WebSVN – Kolibri OS – Blame – /drivers/video/drm/drm_crtc.c

Rev	Author	Line No.	Line
1123	serge	1	/*
		2	* Copyright (c) 2006-2008 Intel Corporation
		3	* Copyright (c) 2007 Dave Airlie
		4	* Copyright (c) 2008 Red Hat Inc.
		5	*
		6	* DRM core CRTC related functions
		7	*
		8	* Permission to use, copy, modify, distribute, and sell this software and its
		9	* documentation for any purpose is hereby granted without fee, provided that
		10	* the above copyright notice appear in all copies and that both that copyright
		11	* notice and this permission notice appear in supporting documentation, and
		12	* that the name of the copyright holders not be used in advertising or
		13	* publicity pertaining to distribution of the software without specific,
		14	* written prior permission. The copyright holders make no representations
		15	* about the suitability of this software for any purpose. It is provided "as
		16	* is" without express or implied warranty.
		17	*
		18	* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
		19	* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
		20	* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
		21	* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
		22	* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
		23	* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
		24	* OF THIS SOFTWARE.
		25	*
		26	* Authors:
		27	* Keith Packard
		28	* Eric Anholt
		29	* Dave Airlie
		30	* Jesse Barnes
		31	*/
4075	Serge	32	#include
1179	serge	33	#include
1963	serge	34	#include
3031	serge	35	#include
		36	#include
		37	#include
		38	#include
		39	#include
5060	serge	40	#include
6084	serge	41	#include
1123	serge	42
5060	serge	43	#include "drm_crtc_internal.h"
5271	serge	44	#include "drm_internal.h"
5060	serge	45
6084	serge	46	static struct drm_framebuffer *
		47	internal_framebuffer_create(struct drm_device *dev,
		48	struct drm_mode_fb_cmd2 *r,
		49	struct drm_file *file_priv);
5060	serge	50
1123	serge	51	/* Avoid boilerplate. I'm tired of typing. */
		52	#define DRM_ENUM_NAME_FN(fnname, list) \
4075	Serge	53	const char *fnname(int val) \
1123	serge	54	{ \
		55	int i; \
		56	for (i = 0; i < ARRAY_SIZE(list); i++) { \
		57	if (list[i].type == val) \
		58	return list[i].name; \
		59	} \
		60	return "(unknown)"; \
		61	}
		62
		63	/*
		64	* Global properties
		65	*/
6084	serge	66	static const struct drm_prop_enum_list drm_dpms_enum_list[] = {
		67	{ DRM_MODE_DPMS_ON, "On" },
1123	serge	68	{ DRM_MODE_DPMS_STANDBY, "Standby" },
		69	{ DRM_MODE_DPMS_SUSPEND, "Suspend" },
		70	{ DRM_MODE_DPMS_OFF, "Off" }
		71	};
		72
		73	DRM_ENUM_NAME_FN(drm_get_dpms_name, drm_dpms_enum_list)
		74
6084	serge	75	static const struct drm_prop_enum_list drm_plane_type_enum_list[] = {
5060	serge	76	{ DRM_PLANE_TYPE_OVERLAY, "Overlay" },
		77	{ DRM_PLANE_TYPE_PRIMARY, "Primary" },
		78	{ DRM_PLANE_TYPE_CURSOR, "Cursor" },
		79	};
		80
1123	serge	81	/*
		82	* Optional properties
		83	*/
6084	serge	84	static const struct drm_prop_enum_list drm_scaling_mode_enum_list[] = {
1179	serge	85	{ DRM_MODE_SCALE_NONE, "None" },
		86	{ DRM_MODE_SCALE_FULLSCREEN, "Full" },
		87	{ DRM_MODE_SCALE_CENTER, "Center" },
		88	{ DRM_MODE_SCALE_ASPECT, "Full aspect" },
1123	serge	89	};
		90
5060	serge	91	static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = {
		92	{ DRM_MODE_PICTURE_ASPECT_NONE, "Automatic" },
		93	{ DRM_MODE_PICTURE_ASPECT_4_3, "4:3" },
		94	{ DRM_MODE_PICTURE_ASPECT_16_9, "16:9" },
		95	};
		96
1123	serge	97	/*
		98	* Non-global properties, but "required" for certain connectors.
		99	*/
6084	serge	100	static const struct drm_prop_enum_list drm_dvi_i_select_enum_list[] = {
1123	serge	101	{ DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
		102	{ DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
		103	{ DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
		104	};
		105
		106	DRM_ENUM_NAME_FN(drm_get_dvi_i_select_name, drm_dvi_i_select_enum_list)
		107
6084	serge	108	static const struct drm_prop_enum_list drm_dvi_i_subconnector_enum_list[] = {
1123	serge	109	{ DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
		110	{ DRM_MODE_SUBCONNECTOR_DVID, "DVI-D" }, /* DVI-I */
		111	{ DRM_MODE_SUBCONNECTOR_DVIA, "DVI-A" }, /* DVI-I */
		112	};
		113
		114	DRM_ENUM_NAME_FN(drm_get_dvi_i_subconnector_name,
		115	drm_dvi_i_subconnector_enum_list)
		116
6084	serge	117	static const struct drm_prop_enum_list drm_tv_select_enum_list[] = {
1123	serge	118	{ DRM_MODE_SUBCONNECTOR_Automatic, "Automatic" }, /* DVI-I and TV-out */
		119	{ DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
		120	{ DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
		121	{ DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
1179	serge	122	{ DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
1123	serge	123	};
		124
		125	DRM_ENUM_NAME_FN(drm_get_tv_select_name, drm_tv_select_enum_list)
		126
6084	serge	127	static const struct drm_prop_enum_list drm_tv_subconnector_enum_list[] = {
1123	serge	128	{ DRM_MODE_SUBCONNECTOR_Unknown, "Unknown" }, /* DVI-I and TV-out */
		129	{ DRM_MODE_SUBCONNECTOR_Composite, "Composite" }, /* TV-out */
		130	{ DRM_MODE_SUBCONNECTOR_SVIDEO, "SVIDEO" }, /* TV-out */
		131	{ DRM_MODE_SUBCONNECTOR_Component, "Component" }, /* TV-out */
1179	serge	132	{ DRM_MODE_SUBCONNECTOR_SCART, "SCART" }, /* TV-out */
1123	serge	133	};
		134
		135	DRM_ENUM_NAME_FN(drm_get_tv_subconnector_name,
		136	drm_tv_subconnector_enum_list)
		137
4075	Serge	138	static const struct drm_prop_enum_list drm_dirty_info_enum_list[] = {
1321	serge	139	{ DRM_MODE_DIRTY_OFF, "Off" },
		140	{ DRM_MODE_DIRTY_ON, "On" },
		141	{ DRM_MODE_DIRTY_ANNOTATE, "Annotate" },
		142	};
		143
1123	serge	144	struct drm_conn_prop_enum_list {
		145	int type;
4075	Serge	146	const char *name;
4104	Serge	147	struct ida ida;
1123	serge	148	};
		149
		150	/*
		151	* Connector and encoder types.
		152	*/
6084	serge	153	static struct drm_conn_prop_enum_list drm_connector_enum_list[] = {
		154	{ DRM_MODE_CONNECTOR_Unknown, "Unknown" },
4104	Serge	155	{ DRM_MODE_CONNECTOR_VGA, "VGA" },
		156	{ DRM_MODE_CONNECTOR_DVII, "DVI-I" },
		157	{ DRM_MODE_CONNECTOR_DVID, "DVI-D" },
		158	{ DRM_MODE_CONNECTOR_DVIA, "DVI-A" },
		159	{ DRM_MODE_CONNECTOR_Composite, "Composite" },
		160	{ DRM_MODE_CONNECTOR_SVIDEO, "SVIDEO" },
		161	{ DRM_MODE_CONNECTOR_LVDS, "LVDS" },
		162	{ DRM_MODE_CONNECTOR_Component, "Component" },
		163	{ DRM_MODE_CONNECTOR_9PinDIN, "DIN" },
		164	{ DRM_MODE_CONNECTOR_DisplayPort, "DP" },
		165	{ DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" },
		166	{ DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" },
		167	{ DRM_MODE_CONNECTOR_TV, "TV" },
		168	{ DRM_MODE_CONNECTOR_eDP, "eDP" },
		169	{ DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" },
4560	Serge	170	{ DRM_MODE_CONNECTOR_DSI, "DSI" },
1123	serge	171	};
		172
6084	serge	173	static const struct drm_prop_enum_list drm_encoder_enum_list[] = {
		174	{ DRM_MODE_ENCODER_NONE, "None" },
1123	serge	175	{ DRM_MODE_ENCODER_DAC, "DAC" },
		176	{ DRM_MODE_ENCODER_TMDS, "TMDS" },
		177	{ DRM_MODE_ENCODER_LVDS, "LVDS" },
		178	{ DRM_MODE_ENCODER_TVDAC, "TV" },
3031	serge	179	{ DRM_MODE_ENCODER_VIRTUAL, "Virtual" },
4560	Serge	180	{ DRM_MODE_ENCODER_DSI, "DSI" },
5060	serge	181	{ DRM_MODE_ENCODER_DPMST, "DP MST" },
1123	serge	182	};
		183
6084	serge	184	static const struct drm_prop_enum_list drm_subpixel_enum_list[] = {
5060	serge	185	{ SubPixelUnknown, "Unknown" },
		186	{ SubPixelHorizontalRGB, "Horizontal RGB" },
		187	{ SubPixelHorizontalBGR, "Horizontal BGR" },
		188	{ SubPixelVerticalRGB, "Vertical RGB" },
		189	{ SubPixelVerticalBGR, "Vertical BGR" },
		190	{ SubPixelNone, "None" },
		191	};
		192
4104	Serge	193	void drm_connector_ida_init(void)
		194	{
		195	int i;
		196
		197	for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
		198	ida_init(&drm_connector_enum_list[i].ida);
		199	}
		200
		201	void drm_connector_ida_destroy(void)
		202	{
		203	int i;
		204
		205	for (i = 0; i < ARRAY_SIZE(drm_connector_enum_list); i++)
		206	ida_destroy(&drm_connector_enum_list[i].ida);
		207	}
		208
5060	serge	209	/**
		210	* drm_get_connector_status_name - return a string for connector status
		211	* @status: connector status to compute name of
		212	*
		213	* In contrast to the other drm_get_*_name functions this one here returns a
		214	* const pointer and hence is threadsafe.
		215	*/
4075	Serge	216	const char *drm_get_connector_status_name(enum drm_connector_status status)
1123	serge	217	{
		218	if (status == connector_status_connected)
		219	return "connected";
		220	else if (status == connector_status_disconnected)
		221	return "disconnected";
		222	else
		223	return "unknown";
		224	}
3764	Serge	225	EXPORT_SYMBOL(drm_get_connector_status_name);
1123	serge	226
5060	serge	227	/**
		228	* drm_get_subpixel_order_name - return a string for a given subpixel enum
		229	* @order: enum of subpixel_order
		230	*
		231	* Note you could abuse this and return something out of bounds, but that
		232	* would be a caller error. No unscrubbed user data should make it here.
		233	*/
		234	const char *drm_get_subpixel_order_name(enum subpixel_order order)
		235	{
		236	return drm_subpixel_enum_list[order].name;
		237	}
		238	EXPORT_SYMBOL(drm_get_subpixel_order_name);
		239
4075	Serge	240	static char printable_char(int c)
		241	{
		242	return isascii(c) && isprint(c) ? c : '?';
		243	}
		244
5060	serge	245	/**
		246	* drm_get_format_name - return a string for drm fourcc format
		247	* @format: format to compute name of
		248	*
		249	* Note that the buffer used by this function is globally shared and owned by
		250	* the function itself.
		251	*
		252	* FIXME: This isn't really multithreading safe.
		253	*/
4075	Serge	254	const char *drm_get_format_name(uint32_t format)
		255	{
		256	static char buf[32];
		257
		258	snprintf(buf, sizeof(buf),
		259	"%c%c%c%c %s-endian (0x%08x)",
		260	printable_char(format & 0xff),
		261	printable_char((format >> 8) & 0xff),
		262	printable_char((format >> 16) & 0xff),
		263	printable_char((format >> 24) & 0x7f),
		264	format & DRM_FORMAT_BIG_ENDIAN ? "big" : "little",
		265	format);
		266
		267	return buf;
		268	}
		269	EXPORT_SYMBOL(drm_get_format_name);
		270
5060	serge	271	/*
		272	* Internal function to assign a slot in the object idr and optionally
		273	* register the object into the idr.
1123	serge	274	*/
5060	serge	275	static int drm_mode_object_get_reg(struct drm_device *dev,
		276	struct drm_mode_object *obj,
		277	uint32_t obj_type,
		278	bool register_obj)
1123	serge	279	{
		280	int ret;
		281
3480	Serge	282	mutex_lock(&dev->mode_config.idr_mutex);
5060	serge	283	ret = idr_alloc(&dev->mode_config.crtc_idr, register_obj ? obj : NULL, 1, 0, GFP_KERNEL);
3480	Serge	284	if (ret >= 0) {
		285	/*
		286	* Set up the object linking under the protection of the idr
		287	* lock so that other users can't see inconsistent state.
		288	*/
		289	obj->id = ret;
		290	obj->type = obj_type;
1123	serge	291	}
1179	serge	292	mutex_unlock(&dev->mode_config.idr_mutex);
1123	serge	293
3480	Serge	294	return ret < 0 ? ret : 0;
1123	serge	295	}
		296
		297	/**
5060	serge	298	* drm_mode_object_get - allocate a new modeset identifier
		299	* @dev: DRM device
		300	* @obj: object pointer, used to generate unique ID
		301	* @obj_type: object type
		302	*
		303	* Create a unique identifier based on @ptr in @dev's identifier space. Used
		304	* for tracking modes, CRTCs and connectors. Note that despite the _get postfix
		305	* modeset identifiers are _not_ reference counted. Hence don't use this for
		306	* reference counted modeset objects like framebuffers.
		307	*
		308	* Returns:
6084	serge	309	* Zero on success, error code on failure.
5060	serge	310	*/
		311	int drm_mode_object_get(struct drm_device *dev,
6084	serge	312	struct drm_mode_object *obj, uint32_t obj_type)
5060	serge	313	{
		314	return drm_mode_object_get_reg(dev, obj, obj_type, true);
		315	}
		316
		317	static void drm_mode_object_register(struct drm_device *dev,
		318	struct drm_mode_object *obj)
		319	{
		320	mutex_lock(&dev->mode_config.idr_mutex);
		321	idr_replace(&dev->mode_config.crtc_idr, obj, obj->id);
		322	mutex_unlock(&dev->mode_config.idr_mutex);
		323	}
		324
		325	/**
3480	Serge	326	* drm_mode_object_put - free a modeset identifer
1123	serge	327	* @dev: DRM device
3480	Serge	328	* @object: object to free
1123	serge	329	*
5060	serge	330	* Free @id from @dev's unique identifier pool. Note that despite the _get
		331	* postfix modeset identifiers are _not_ reference counted. Hence don't use this
		332	* for reference counted modeset objects like framebuffers.
1123	serge	333	*/
5060	serge	334	void drm_mode_object_put(struct drm_device *dev,
6084	serge	335	struct drm_mode_object *object)
1123	serge	336	{
1179	serge	337	mutex_lock(&dev->mode_config.idr_mutex);
1123	serge	338	idr_remove(&dev->mode_config.crtc_idr, object->id);
1179	serge	339	mutex_unlock(&dev->mode_config.idr_mutex);
1123	serge	340	}
		341
5060	serge	342	static struct drm_mode_object _object_find(struct drm_device dev,
		343	uint32_t id, uint32_t type)
		344	{
		345	struct drm_mode_object *obj = NULL;
		346
		347	mutex_lock(&dev->mode_config.idr_mutex);
		348	obj = idr_find(&dev->mode_config.crtc_idr, id);
		349	if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type)
		350	obj = NULL;
		351	if (obj && obj->id != id)
		352	obj = NULL;
		353	/* don't leak out unref'd fb's */
6084	serge	354	if (obj &&
		355	(obj->type == DRM_MODE_OBJECT_FB \|\|
		356	obj->type == DRM_MODE_OBJECT_BLOB))
5060	serge	357	obj = NULL;
		358	mutex_unlock(&dev->mode_config.idr_mutex);
		359
		360	return obj;
		361	}
		362
3480	Serge	363	/**
		364	* drm_mode_object_find - look up a drm object with static lifetime
		365	* @dev: drm device
		366	* @id: id of the mode object
		367	* @type: type of the mode object
		368	*
		369	* Note that framebuffers cannot be looked up with this functions - since those
5060	serge	370	* are reference counted, they need special treatment. Even with
		371	* DRM_MODE_OBJECT_ANY (although that will simply return NULL
		372	* rather than WARN_ON()).
3480	Serge	373	*/
1321	serge	374	struct drm_mode_object drm_mode_object_find(struct drm_device dev,
		375	uint32_t id, uint32_t type)
1123	serge	376	{
		377	struct drm_mode_object *obj = NULL;
		378
3480	Serge	379	/* Framebuffers are reference counted and need their own lookup
		380	* function.*/
6084	serge	381	WARN_ON(type == DRM_MODE_OBJECT_FB \|\| type == DRM_MODE_OBJECT_BLOB);
5060	serge	382	obj = _object_find(dev, id, type);
1123	serge	383	return obj;
		384	}
		385	EXPORT_SYMBOL(drm_mode_object_find);
		386
		387	/**
		388	* drm_framebuffer_init - initialize a framebuffer
		389	* @dev: DRM device
3480	Serge	390	* @fb: framebuffer to be initialized
		391	* @funcs: ... with these functions
1123	serge	392	*
		393	* Allocates an ID for the framebuffer's parent mode object, sets its mode
		394	* functions & device file and adds it to the master fd list.
		395	*
3480	Serge	396	* IMPORTANT:
		397	* This functions publishes the fb and makes it available for concurrent access
		398	* by other users. Which means by this point the fb _must_ be fully set up -
		399	* since all the fb attributes are invariant over its lifetime, no further
		400	* locking but only correct reference counting is required.
		401	*
5060	serge	402	* Returns:
1321	serge	403	* Zero on success, error code on failure.
1123	serge	404	*/
		405	int drm_framebuffer_init(struct drm_device dev, struct drm_framebuffer fb,
		406	const struct drm_framebuffer_funcs *funcs)
		407	{
		408	int ret;
1963	serge	409
3480	Serge	410	mutex_lock(&dev->mode_config.fb_lock);
		411	kref_init(&fb->refcount);
		412	INIT_LIST_HEAD(&fb->filp_head);
		413	fb->dev = dev;
		414	fb->funcs = funcs;
		415
1123	serge	416	ret = drm_mode_object_get(dev, &fb->base, DRM_MODE_OBJECT_FB);
3031	serge	417	if (ret)
3480	Serge	418	goto out;
1123	serge	419
		420	dev->mode_config.num_fb++;
		421	list_add(&fb->head, &dev->mode_config.fb_list);
3480	Serge	422	out:
		423	mutex_unlock(&dev->mode_config.fb_lock);
1123	serge	424
6084	serge	425	return ret;
1123	serge	426	}
		427	EXPORT_SYMBOL(drm_framebuffer_init);
		428
5271	serge	429	/* dev->mode_config.fb_lock must be held! */
		430	static void __drm_framebuffer_unregister(struct drm_device *dev,
		431	struct drm_framebuffer *fb)
		432	{
		433	mutex_lock(&dev->mode_config.idr_mutex);
		434	idr_remove(&dev->mode_config.crtc_idr, fb->base.id);
		435	mutex_unlock(&dev->mode_config.idr_mutex);
		436
		437	fb->base.id = 0;
		438	}
		439
3480	Serge	440	static void drm_framebuffer_free(struct kref *kref)
		441	{
		442	struct drm_framebuffer *fb =
		443	container_of(kref, struct drm_framebuffer, refcount);
5271	serge	444	struct drm_device *dev = fb->dev;
		445
		446	/*
		447	* The lookup idr holds a weak reference, which has not necessarily been
		448	* removed at this point. Check for that.
		449	*/
		450	mutex_lock(&dev->mode_config.fb_lock);
		451	if (fb->base.id) {
		452	/* Mark fb as reaped and drop idr ref. */
		453	__drm_framebuffer_unregister(dev, fb);
		454	}
		455	mutex_unlock(&dev->mode_config.fb_lock);
		456
3480	Serge	457	fb->funcs->destroy(fb);
		458	}
		459
		460	static struct drm_framebuffer __drm_framebuffer_lookup(struct drm_device dev,
		461	uint32_t id)
		462	{
		463	struct drm_mode_object *obj = NULL;
		464	struct drm_framebuffer *fb;
		465
		466	mutex_lock(&dev->mode_config.idr_mutex);
		467	obj = idr_find(&dev->mode_config.crtc_idr, id);
		468	if (!obj \|\| (obj->type != DRM_MODE_OBJECT_FB) \|\| (obj->id != id))
		469	fb = NULL;
		470	else
		471	fb = obj_to_fb(obj);
		472	mutex_unlock(&dev->mode_config.idr_mutex);
		473
		474	return fb;
		475	}
		476
1123	serge	477	/**
3480	Serge	478	* drm_framebuffer_lookup - look up a drm framebuffer and grab a reference
		479	* @dev: drm device
		480	* @id: id of the fb object
		481	*
		482	* If successful, this grabs an additional reference to the framebuffer -
		483	* callers need to make sure to eventually unreference the returned framebuffer
5060	serge	484	* again, using @drm_framebuffer_unreference.
3480	Serge	485	*/
		486	struct drm_framebuffer drm_framebuffer_lookup(struct drm_device dev,
		487	uint32_t id)
		488	{
		489	struct drm_framebuffer *fb;
		490
		491	mutex_lock(&dev->mode_config.fb_lock);
		492	fb = __drm_framebuffer_lookup(dev, id);
6084	serge	493	if (fb) {
		494	if (!kref_get_unless_zero(&fb->refcount))
		495	fb = NULL;
		496	}
3480	Serge	497	mutex_unlock(&dev->mode_config.fb_lock);
		498
		499	return fb;
		500	}
		501	EXPORT_SYMBOL(drm_framebuffer_lookup);
		502
		503	/**
		504	* drm_framebuffer_unreference - unref a framebuffer
		505	* @fb: framebuffer to unref
		506	*
		507	* This functions decrements the fb's refcount and frees it if it drops to zero.
		508	*/
		509	void drm_framebuffer_unreference(struct drm_framebuffer *fb)
		510	{
5060	serge	511	DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount));
3480	Serge	512	kref_put(&fb->refcount, drm_framebuffer_free);
		513	}
		514	EXPORT_SYMBOL(drm_framebuffer_unreference);
		515
		516	/**
		517	* drm_framebuffer_reference - incr the fb refcnt
		518	* @fb: framebuffer
5060	serge	519	*
		520	* This functions increments the fb's refcount.
3480	Serge	521	*/
		522	void drm_framebuffer_reference(struct drm_framebuffer *fb)
		523	{
5060	serge	524	DRM_DEBUG("%p: FB ID: %d (%d)\n", fb, fb->base.id, atomic_read(&fb->refcount.refcount));
3480	Serge	525	kref_get(&fb->refcount);
		526	}
		527	EXPORT_SYMBOL(drm_framebuffer_reference);
		528
		529	/**
		530	* drm_framebuffer_unregister_private - unregister a private fb from the lookup idr
		531	* @fb: fb to unregister
		532	*
		533	* Drivers need to call this when cleaning up driver-private framebuffers, e.g.
		534	* those used for fbdev. Note that the caller must hold a reference of it's own,
		535	* i.e. the object may not be destroyed through this call (since it'll lead to a
		536	* locking inversion).
		537	*/
		538	void drm_framebuffer_unregister_private(struct drm_framebuffer *fb)
		539	{
6084	serge	540	struct drm_device *dev;
3480	Serge	541
6084	serge	542	if (!fb)
		543	return;
		544
		545	dev = fb->dev;
		546
3480	Serge	547	mutex_lock(&dev->mode_config.fb_lock);
		548	/* Mark fb as reaped and drop idr ref. */
		549	__drm_framebuffer_unregister(dev, fb);
		550	mutex_unlock(&dev->mode_config.fb_lock);
		551	}
		552	EXPORT_SYMBOL(drm_framebuffer_unregister_private);
		553
		554	/**
1123	serge	555	* drm_framebuffer_cleanup - remove a framebuffer object
		556	* @fb: framebuffer to remove
		557	*
5060	serge	558	* Cleanup framebuffer. This function is intended to be used from the drivers
		559	* ->destroy callback. It can also be used to clean up driver private
		560	* framebuffers embedded into a larger structure.
1123	serge	561	*
3480	Serge	562	* Note that this function does not remove the fb from active usuage - if it is
		563	* still used anywhere, hilarity can ensue since userspace could call getfb on
		564	* the id and get back -EINVAL. Obviously no concern at driver unload time.
		565	*
		566	* Also, the framebuffer will not be removed from the lookup idr - for
		567	* user-created framebuffers this will happen in in the rmfb ioctl. For
		568	* driver-private objects (e.g. for fbdev) drivers need to explicitly call
		569	* drm_framebuffer_unregister_private.
1123	serge	570	*/
		571	void drm_framebuffer_cleanup(struct drm_framebuffer *fb)
		572	{
		573	struct drm_device *dev = fb->dev;
3480	Serge	574
		575	mutex_lock(&dev->mode_config.fb_lock);
1123	serge	576	list_del(&fb->head);
		577	dev->mode_config.num_fb--;
3480	Serge	578	mutex_unlock(&dev->mode_config.fb_lock);
1123	serge	579	}
		580	EXPORT_SYMBOL(drm_framebuffer_cleanup);
		581
3480	Serge	582	/**
		583	* drm_framebuffer_remove - remove and unreference a framebuffer object
		584	* @fb: framebuffer to remove
		585	*
		586	* Scans all the CRTCs and planes in @dev's mode_config. If they're
		587	* using @fb, removes it, setting it to NULL. Then drops the reference to the
		588	* passed-in framebuffer. Might take the modeset locks.
		589	*
		590	* Note that this function optimizes the cleanup away if the caller holds the
		591	* last reference to the framebuffer. It is also guaranteed to not take the
		592	* modeset locks in this case.
		593	*/
		594	void drm_framebuffer_remove(struct drm_framebuffer *fb)
		595	{
6084	serge	596	struct drm_device *dev;
3480	Serge	597	struct drm_crtc *crtc;
		598	struct drm_plane *plane;
		599	struct drm_mode_set set;
		600	int ret;
3031	serge	601
6084	serge	602	if (!fb)
		603	return;
		604
		605	dev = fb->dev;
		606
3480	Serge	607	WARN_ON(!list_empty(&fb->filp_head));
3031	serge	608
3480	Serge	609	/*
		610	* drm ABI mandates that we remove any deleted framebuffers from active
		611	* useage. But since most sane clients only remove framebuffers they no
		612	* longer need, try to optimize this away.
		613	*
		614	* Since we're holding a reference ourselves, observing a refcount of 1
		615	* means that we're the last holder and can skip it. Also, the refcount
		616	* can never increase from 1 again, so we don't need any barriers or
		617	* locks.
		618	*
		619	* Note that userspace could try to race with use and instate a new
		620	* usage _after_ we've cleared all current ones. End result will be an
		621	* in-use fb with fb-id == 0. Userspace is allowed to shoot its own foot
		622	* in this manner.
		623	*/
		624	if (atomic_read(&fb->refcount.refcount) > 1) {
		625	drm_modeset_lock_all(dev);
		626	/* remove from any CRTC */
6084	serge	627	drm_for_each_crtc(crtc, dev) {
5060	serge	628	if (crtc->primary->fb == fb) {
3480	Serge	629	/* should turn off the crtc */
		630	memset(&set, 0, sizeof(struct drm_mode_set));
		631	set.crtc = crtc;
		632	set.fb = NULL;
		633	ret = drm_mode_set_config_internal(&set);
		634	if (ret)
		635	DRM_ERROR("failed to reset crtc %p when fb was deleted\n", crtc);
		636	}
		637	}
3031	serge	638
6084	serge	639	drm_for_each_plane(plane, dev) {
4075	Serge	640	if (plane->fb == fb)
		641	drm_plane_force_disable(plane);
3480	Serge	642	}
		643	drm_modeset_unlock_all(dev);
		644	}
3031	serge	645
3480	Serge	646	drm_framebuffer_unreference(fb);
		647	}
		648	EXPORT_SYMBOL(drm_framebuffer_remove);
		649
5060	serge	650	DEFINE_WW_CLASS(crtc_ww_class);
		651
1123	serge	652	/**
5060	serge	653	* drm_crtc_init_with_planes - Initialise a new CRTC object with
		654	* specified primary and cursor planes.
1123	serge	655	* @dev: DRM device
		656	* @crtc: CRTC object to init
5060	serge	657	* @primary: Primary plane for CRTC
		658	* @cursor: Cursor plane for CRTC
1123	serge	659	* @funcs: callbacks for the new CRTC
		660	*
4075	Serge	661	* Inits a new object created as base part of a driver crtc object.
3031	serge	662	*
5060	serge	663	* Returns:
3031	serge	664	* Zero on success, error code on failure.
1123	serge	665	*/
5060	serge	666	int drm_crtc_init_with_planes(struct drm_device dev, struct drm_crtc crtc,
		667	struct drm_plane *primary,
		668	struct drm_plane *cursor,
6084	serge	669	const struct drm_crtc_funcs *funcs)
1123	serge	670	{
5060	serge	671	struct drm_mode_config *config = &dev->mode_config;
3031	serge	672	int ret;
		673
6084	serge	674	WARN_ON(primary && primary->type != DRM_PLANE_TYPE_PRIMARY);
		675	WARN_ON(cursor && cursor->type != DRM_PLANE_TYPE_CURSOR);
		676
1123	serge	677	crtc->dev = dev;
		678	crtc->funcs = funcs;
		679
5060	serge	680	drm_modeset_lock_init(&crtc->mutex);
3031	serge	681	ret = drm_mode_object_get(dev, &crtc->base, DRM_MODE_OBJECT_CRTC);
		682	if (ret)
5271	serge	683	return ret;
3031	serge	684
		685	crtc->base.properties = &crtc->properties;
		686
5060	serge	687	list_add_tail(&crtc->head, &config->crtc_list);
		688	config->num_crtc++;
3031	serge	689
5060	serge	690	crtc->primary = primary;
		691	crtc->cursor = cursor;
		692	if (primary)
		693	primary->possible_crtcs = 1 << drm_crtc_index(crtc);
		694	if (cursor)
		695	cursor->possible_crtcs = 1 << drm_crtc_index(crtc);
		696
6084	serge	697	if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
		698	drm_object_attach_property(&crtc->base, config->prop_active, 0);
		699	drm_object_attach_property(&crtc->base, config->prop_mode_id, 0);
		700	}
		701
5271	serge	702	return 0;
1123	serge	703	}
5060	serge	704	EXPORT_SYMBOL(drm_crtc_init_with_planes);
1123	serge	705
		706	/**
4075	Serge	707	* drm_crtc_cleanup - Clean up the core crtc usage
1123	serge	708	* @crtc: CRTC to cleanup
		709	*
4075	Serge	710	* This function cleans up @crtc and removes it from the DRM mode setting
		711	* core. Note that the function does not free the crtc structure itself,
		712	* this is the responsibility of the caller.
1123	serge	713	*/
		714	void drm_crtc_cleanup(struct drm_crtc *crtc)
		715	{
		716	struct drm_device *dev = crtc->dev;
		717
6084	serge	718	kfree(crtc->gamma_store);
		719	crtc->gamma_store = NULL;
1123	serge	720
5060	serge	721	drm_modeset_lock_fini(&crtc->mutex);
		722
1123	serge	723	drm_mode_object_put(dev, &crtc->base);
		724	list_del(&crtc->head);
		725	dev->mode_config.num_crtc--;
5271	serge	726
		727	WARN_ON(crtc->state && !crtc->funcs->atomic_destroy_state);
		728	if (crtc->state && crtc->funcs->atomic_destroy_state)
		729	crtc->funcs->atomic_destroy_state(crtc, crtc->state);
		730
		731	memset(crtc, 0, sizeof(*crtc));
1123	serge	732	}
		733	EXPORT_SYMBOL(drm_crtc_cleanup);
		734
		735	/**
4560	Serge	736	* drm_crtc_index - find the index of a registered CRTC
		737	* @crtc: CRTC to find index for
		738	*
		739	* Given a registered CRTC, return the index of that CRTC within a DRM
		740	* device's list of CRTCs.
		741	*/
		742	unsigned int drm_crtc_index(struct drm_crtc *crtc)
		743	{
		744	unsigned int index = 0;
		745	struct drm_crtc *tmp;
		746
6084	serge	747	drm_for_each_crtc(tmp, crtc->dev) {
4560	Serge	748	if (tmp == crtc)
		749	return index;
		750
		751	index++;
		752	}
		753
		754	BUG();
		755	}
		756	EXPORT_SYMBOL(drm_crtc_index);
		757
4104	Serge	758	/*
1123	serge	759	* drm_mode_remove - remove and free a mode
		760	* @connector: connector list to modify
		761	* @mode: mode to remove
		762	*
		763	* Remove @mode from @connector's mode list, then free it.
		764	*/
4104	Serge	765	static void drm_mode_remove(struct drm_connector *connector,
6084	serge	766	struct drm_display_mode *mode)
1123	serge	767	{
		768	list_del(&mode->head);
3031	serge	769	drm_mode_destroy(connector->dev, mode);
1123	serge	770	}
		771
		772	/**
6084	serge	773	* drm_display_info_set_bus_formats - set the supported bus formats
		774	* @info: display info to store bus formats in
		775	* @formats: array containing the supported bus formats
		776	* @num_formats: the number of entries in the fmts array
		777	*
		778	* Store the supported bus formats in display info structure.
		779	* See MEDIA_BUS_FMT_* definitions in include/uapi/linux/media-bus-format.h for
		780	* a full list of available formats.
		781	*/
		782	int drm_display_info_set_bus_formats(struct drm_display_info *info,
		783	const u32 *formats,
		784	unsigned int num_formats)
		785	{
		786	u32 *fmts = NULL;
		787
		788	if (!formats && num_formats)
		789	return -EINVAL;
		790
		791	if (formats && num_formats) {
		792	fmts = kmemdup(formats, sizeof(formats) num_formats,
		793	GFP_KERNEL);
		794	if (!fmts)
		795	return -ENOMEM;
		796	}
		797
		798	kfree(info->bus_formats);
		799	info->bus_formats = fmts;
		800	info->num_bus_formats = num_formats;
		801
		802	return 0;
		803	}
		804	EXPORT_SYMBOL(drm_display_info_set_bus_formats);
		805
		806	/**
		807	* drm_connector_get_cmdline_mode - reads the user's cmdline mode
		808	* @connector: connector to quwery
		809	*
		810	* The kernel supports per-connector configration of its consoles through
		811	* use of the video= parameter. This function parses that option and
		812	* extracts the user's specified mode (or enable/disable status) for a
		813	* particular connector. This is typically only used during the early fbdev
		814	* setup.
		815	*/
		816	static void drm_connector_get_cmdline_mode(struct drm_connector *connector)
		817	{
		818	struct drm_cmdline_mode *mode = &connector->cmdline_mode;
		819	char *option = NULL;
		820
		821	return;
		822	#if 0
		823	if (fb_get_options(connector->name, &option))
		824	return;
		825
		826	if (!drm_mode_parse_command_line_for_connector(option,
		827	connector,
		828	mode))
		829	return;
		830
		831	if (mode->force) {
		832	const char *s;
		833
		834	switch (mode->force) {
		835	case DRM_FORCE_OFF:
		836	s = "OFF";
		837	break;
		838	case DRM_FORCE_ON_DIGITAL:
		839	s = "ON - dig";
		840	break;
		841	default:
		842	case DRM_FORCE_ON:
		843	s = "ON";
		844	break;
		845	}
		846
		847	DRM_INFO("forcing %s connector %s\n", connector->name, s);
		848	connector->force = mode->force;
		849	}
		850
		851	DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
		852	connector->name,
		853	mode->xres, mode->yres,
		854	mode->refresh_specified ? mode->refresh : 60,
		855	mode->rb ? " reduced blanking" : "",
		856	mode->margins ? " with margins" : "",
		857	mode->interlace ? " interlaced" : "");
		858	#endif
		859	}
		860
		861	/**
1123	serge	862	* drm_connector_init - Init a preallocated connector
		863	* @dev: DRM device
		864	* @connector: the connector to init
		865	* @funcs: callbacks for this connector
3480	Serge	866	* @connector_type: user visible type of the connector
1123	serge	867	*
		868	* Initialises a preallocated connector. Connectors should be
		869	* subclassed as part of driver connector objects.
3031	serge	870	*
5060	serge	871	* Returns:
3031	serge	872	* Zero on success, error code on failure.
1123	serge	873	*/
3031	serge	874	int drm_connector_init(struct drm_device *dev,
6084	serge	875	struct drm_connector *connector,
		876	const struct drm_connector_funcs *funcs,
		877	int connector_type)
1123	serge	878	{
6084	serge	879	struct drm_mode_config *config = &dev->mode_config;
3031	serge	880	int ret;
4104	Serge	881	struct ida *connector_ida =
		882	&drm_connector_enum_list[connector_type].ida;
3031	serge	883
3480	Serge	884	drm_modeset_lock_all(dev);
1123	serge	885
5060	serge	886	ret = drm_mode_object_get_reg(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false);
3031	serge	887	if (ret)
5060	serge	888	goto out_unlock;
3031	serge	889
		890	connector->base.properties = &connector->properties;
1123	serge	891	connector->dev = dev;
		892	connector->funcs = funcs;
		893	connector->connector_type = connector_type;
		894	connector->connector_type_id =
4104	Serge	895	ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
		896	if (connector->connector_type_id < 0) {
		897	ret = connector->connector_type_id;
5060	serge	898	goto out_put;
4104	Serge	899	}
5060	serge	900	connector->name =
		901	kasprintf(GFP_KERNEL, "%s-%d",
		902	drm_connector_enum_list[connector_type].name,
		903	connector->connector_type_id);
		904	if (!connector->name) {
		905	ret = -ENOMEM;
		906	goto out_put;
		907	}
		908
1123	serge	909	INIT_LIST_HEAD(&connector->probed_modes);
		910	INIT_LIST_HEAD(&connector->modes);
		911	connector->edid_blob_ptr = NULL;
3192	Serge	912	connector->status = connector_status_unknown;
1123	serge	913
6084	serge	914	drm_connector_get_cmdline_mode(connector);
1123	serge	915
6084	serge	916	/* We should add connectors at the end to avoid upsetting the connector
		917	* index too much. */
		918	list_add_tail(&connector->head, &config->connector_list);
		919	config->num_connector++;
		920
3031	serge	921	if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL)
3192	Serge	922	drm_object_attach_property(&connector->base,
6084	serge	923	config->edid_property,
3031	serge	924	0);
1123	serge	925
3192	Serge	926	drm_object_attach_property(&connector->base,
6084	serge	927	config->dpms_property, 0);
1123	serge	928
6084	serge	929	if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
		930	drm_object_attach_property(&connector->base, config->prop_crtc_id, 0);
		931	}
		932
5060	serge	933	connector->debugfs_entry = NULL;
		934
		935	out_put:
		936	if (ret)
		937	drm_mode_object_put(dev, &connector->base);
		938
		939	out_unlock:
3480	Serge	940	drm_modeset_unlock_all(dev);
3031	serge	941
		942	return ret;
1123	serge	943	}
		944	EXPORT_SYMBOL(drm_connector_init);
		945
		946	/**
		947	* drm_connector_cleanup - cleans up an initialised connector
		948	* @connector: connector to cleanup
		949	*
		950	* Cleans up the connector but doesn't free the object.
		951	*/
		952	void drm_connector_cleanup(struct drm_connector *connector)
		953	{
		954	struct drm_device *dev = connector->dev;
		955	struct drm_display_mode mode, t;
		956
6084	serge	957	if (connector->tile_group) {
		958	drm_mode_put_tile_group(dev, connector->tile_group);
		959	connector->tile_group = NULL;
		960	}
		961
1123	serge	962	list_for_each_entry_safe(mode, t, &connector->probed_modes, head)
		963	drm_mode_remove(connector, mode);
		964
		965	list_for_each_entry_safe(mode, t, &connector->modes, head)
		966	drm_mode_remove(connector, mode);
		967
4104	Serge	968	ida_remove(&drm_connector_enum_list[connector->connector_type].ida,
		969	connector->connector_type_id);
		970
6084	serge	971	kfree(connector->display_info.bus_formats);
1123	serge	972	drm_mode_object_put(dev, &connector->base);
5060	serge	973	kfree(connector->name);
		974	connector->name = NULL;
1123	serge	975	list_del(&connector->head);
2160	serge	976	dev->mode_config.num_connector--;
5271	serge	977
		978	WARN_ON(connector->state && !connector->funcs->atomic_destroy_state);
		979	if (connector->state && connector->funcs->atomic_destroy_state)
		980	connector->funcs->atomic_destroy_state(connector,
		981	connector->state);
		982
		983	memset(connector, 0, sizeof(*connector));
1123	serge	984	}
		985	EXPORT_SYMBOL(drm_connector_cleanup);
		986
5060	serge	987	/**
5271	serge	988	* drm_connector_index - find the index of a registered connector
		989	* @connector: connector to find index for
		990	*
		991	* Given a registered connector, return the index of that connector within a DRM
		992	* device's list of connectors.
		993	*/
		994	unsigned int drm_connector_index(struct drm_connector *connector)
		995	{
		996	unsigned int index = 0;
		997	struct drm_connector *tmp;
		998	struct drm_mode_config *config = &connector->dev->mode_config;
		999
		1000	WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
		1001
6084	serge	1002	drm_for_each_connector(tmp, connector->dev) {
5271	serge	1003	if (tmp == connector)
		1004	return index;
		1005
		1006	index++;
		1007	}
		1008
		1009	BUG();
		1010	}
		1011	EXPORT_SYMBOL(drm_connector_index);
		1012
		1013	/**
5060	serge	1014	* drm_connector_register - register a connector
		1015	* @connector: the connector to register
		1016	*
		1017	* Register userspace interfaces for a connector
		1018	*
		1019	* Returns:
		1020	* Zero on success, error code on failure.
		1021	*/
		1022	int drm_connector_register(struct drm_connector *connector)
		1023	{
		1024	int ret;
		1025
		1026	drm_mode_object_register(connector->dev, &connector->base);
		1027
6084	serge	1028	ret = drm_sysfs_connector_add(connector);
		1029	if (ret)
		1030	return ret;
5060	serge	1031	return 0;
		1032	}
		1033	EXPORT_SYMBOL(drm_connector_register);
		1034
		1035	/**
		1036	* drm_connector_unregister - unregister a connector
		1037	* @connector: the connector to unregister
		1038	*
		1039	* Unregister userspace interfaces for a connector
		1040	*/
		1041	void drm_connector_unregister(struct drm_connector *connector)
		1042	{
6084	serge	1043	drm_sysfs_connector_remove(connector);
5060	serge	1044	}
		1045	EXPORT_SYMBOL(drm_connector_unregister);
		1046
		1047
		1048	/**
		1049	* drm_connector_unplug_all - unregister connector userspace interfaces
		1050	* @dev: drm device
		1051	*
		1052	* This function unregisters all connector userspace interfaces in sysfs. Should
		1053	* be call when the device is disconnected, e.g. from an usb driver's
		1054	* ->disconnect callback.
		1055	*/
3031	serge	1056	void drm_connector_unplug_all(struct drm_device *dev)
		1057	{
		1058	struct drm_connector *connector;
		1059
6084	serge	1060	/* FIXME: taking the mode config mutex ends up in a clash with sysfs */
5060	serge	1061	list_for_each_entry(connector, &dev->mode_config.connector_list, head)
		1062	drm_connector_unregister(connector);
3031	serge	1063
		1064	}
		1065	EXPORT_SYMBOL(drm_connector_unplug_all);
		1066
5060	serge	1067	/**
		1068	* drm_encoder_init - Init a preallocated encoder
		1069	* @dev: drm device
		1070	* @encoder: the encoder to init
		1071	* @funcs: callbacks for this encoder
		1072	* @encoder_type: user visible type of the encoder
		1073	*
		1074	* Initialises a preallocated encoder. Encoder should be
		1075	* subclassed as part of driver encoder objects.
		1076	*
		1077	* Returns:
		1078	* Zero on success, error code on failure.
		1079	*/
3031	serge	1080	int drm_encoder_init(struct drm_device *dev,
1123	serge	1081	struct drm_encoder *encoder,
		1082	const struct drm_encoder_funcs *funcs,
		1083	int encoder_type)
		1084	{
3031	serge	1085	int ret;
		1086
3480	Serge	1087	drm_modeset_lock_all(dev);
1123	serge	1088
3031	serge	1089	ret = drm_mode_object_get(dev, &encoder->base, DRM_MODE_OBJECT_ENCODER);
		1090	if (ret)
5060	serge	1091	goto out_unlock;
3031	serge	1092
1123	serge	1093	encoder->dev = dev;
		1094	encoder->encoder_type = encoder_type;
		1095	encoder->funcs = funcs;
5060	serge	1096	encoder->name = kasprintf(GFP_KERNEL, "%s-%d",
		1097	drm_encoder_enum_list[encoder_type].name,
		1098	encoder->base.id);
		1099	if (!encoder->name) {
		1100	ret = -ENOMEM;
		1101	goto out_put;
		1102	}
1123	serge	1103
		1104	list_add_tail(&encoder->head, &dev->mode_config.encoder_list);
		1105	dev->mode_config.num_encoder++;
		1106
5060	serge	1107	out_put:
		1108	if (ret)
		1109	drm_mode_object_put(dev, &encoder->base);
		1110
		1111	out_unlock:
3480	Serge	1112	drm_modeset_unlock_all(dev);
3031	serge	1113
		1114	return ret;
1123	serge	1115	}
		1116	EXPORT_SYMBOL(drm_encoder_init);
		1117
5060	serge	1118	/**
		1119	* drm_encoder_cleanup - cleans up an initialised encoder
		1120	* @encoder: encoder to cleanup
		1121	*
		1122	* Cleans up the encoder but doesn't free the object.
		1123	*/
1123	serge	1124	void drm_encoder_cleanup(struct drm_encoder *encoder)
		1125	{
		1126	struct drm_device *dev = encoder->dev;
6084	serge	1127
3480	Serge	1128	drm_modeset_lock_all(dev);
1123	serge	1129	drm_mode_object_put(dev, &encoder->base);
5060	serge	1130	kfree(encoder->name);
1123	serge	1131	list_del(&encoder->head);
2160	serge	1132	dev->mode_config.num_encoder--;
3480	Serge	1133	drm_modeset_unlock_all(dev);
5271	serge	1134
		1135	memset(encoder, 0, sizeof(*encoder));
1123	serge	1136	}
		1137	EXPORT_SYMBOL(drm_encoder_cleanup);
		1138
4075	Serge	1139	/**
5060	serge	1140	* drm_universal_plane_init - Initialize a new universal plane object
4075	Serge	1141	* @dev: DRM device
		1142	* @plane: plane object to init
		1143	* @possible_crtcs: bitmask of possible CRTCs
		1144	* @funcs: callbacks for the new plane
		1145	* @formats: array of supported formats (%DRM_FORMAT_*)
		1146	* @format_count: number of elements in @formats
5060	serge	1147	* @type: type of plane (overlay, primary, cursor)
4075	Serge	1148	*
5060	serge	1149	* Initializes a plane object of type @type.
4075	Serge	1150	*
5060	serge	1151	* Returns:
4075	Serge	1152	* Zero on success, error code on failure.
		1153	*/
5060	serge	1154	int drm_universal_plane_init(struct drm_device dev, struct drm_plane plane,
6084	serge	1155	unsigned long possible_crtcs,
		1156	const struct drm_plane_funcs *funcs,
		1157	const uint32_t *formats, unsigned int format_count,
5060	serge	1158	enum drm_plane_type type)
3031	serge	1159	{
6084	serge	1160	struct drm_mode_config *config = &dev->mode_config;
3031	serge	1161	int ret;
		1162
		1163	ret = drm_mode_object_get(dev, &plane->base, DRM_MODE_OBJECT_PLANE);
		1164	if (ret)
5271	serge	1165	return ret;
3031	serge	1166
5271	serge	1167	drm_modeset_lock_init(&plane->mutex);
		1168
3031	serge	1169	plane->base.properties = &plane->properties;
		1170	plane->dev = dev;
		1171	plane->funcs = funcs;
6084	serge	1172	plane->format_types = kmalloc_array(format_count, sizeof(uint32_t),
		1173	GFP_KERNEL);
3031	serge	1174	if (!plane->format_types) {
		1175	DRM_DEBUG_KMS("out of memory when allocating plane\n");
		1176	drm_mode_object_put(dev, &plane->base);
5271	serge	1177	return -ENOMEM;
3031	serge	1178	}
		1179
		1180	memcpy(plane->format_types, formats, format_count * sizeof(uint32_t));
		1181	plane->format_count = format_count;
		1182	plane->possible_crtcs = possible_crtcs;
5060	serge	1183	plane->type = type;
3031	serge	1184
6084	serge	1185	list_add_tail(&plane->head, &config->plane_list);
		1186	config->num_total_plane++;
5060	serge	1187	if (plane->type == DRM_PLANE_TYPE_OVERLAY)
6084	serge	1188	config->num_overlay_plane++;
3031	serge	1189
5060	serge	1190	drm_object_attach_property(&plane->base,
6084	serge	1191	config->plane_type_property,
5060	serge	1192	plane->type);
		1193
6084	serge	1194	if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
		1195	drm_object_attach_property(&plane->base, config->prop_fb_id, 0);
		1196	drm_object_attach_property(&plane->base, config->prop_crtc_id, 0);
		1197	drm_object_attach_property(&plane->base, config->prop_crtc_x, 0);
		1198	drm_object_attach_property(&plane->base, config->prop_crtc_y, 0);
		1199	drm_object_attach_property(&plane->base, config->prop_crtc_w, 0);
		1200	drm_object_attach_property(&plane->base, config->prop_crtc_h, 0);
		1201	drm_object_attach_property(&plane->base, config->prop_src_x, 0);
		1202	drm_object_attach_property(&plane->base, config->prop_src_y, 0);
		1203	drm_object_attach_property(&plane->base, config->prop_src_w, 0);
		1204	drm_object_attach_property(&plane->base, config->prop_src_h, 0);
		1205	}
		1206
5271	serge	1207	return 0;
3031	serge	1208	}
5060	serge	1209	EXPORT_SYMBOL(drm_universal_plane_init);
		1210
		1211	/**
		1212	* drm_plane_init - Initialize a legacy plane
		1213	* @dev: DRM device
		1214	* @plane: plane object to init
		1215	* @possible_crtcs: bitmask of possible CRTCs
		1216	* @funcs: callbacks for the new plane
		1217	* @formats: array of supported formats (%DRM_FORMAT_*)
		1218	* @format_count: number of elements in @formats
		1219	* @is_primary: plane type (primary vs overlay)
		1220	*
		1221	* Legacy API to initialize a DRM plane.
		1222	*
		1223	* New drivers should call drm_universal_plane_init() instead.
		1224	*
		1225	* Returns:
		1226	* Zero on success, error code on failure.
		1227	*/
		1228	int drm_plane_init(struct drm_device dev, struct drm_plane plane,
		1229	unsigned long possible_crtcs,
		1230	const struct drm_plane_funcs *funcs,
6084	serge	1231	const uint32_t *formats, unsigned int format_count,
5060	serge	1232	bool is_primary)
		1233	{
		1234	enum drm_plane_type type;
		1235
		1236	type = is_primary ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
		1237	return drm_universal_plane_init(dev, plane, possible_crtcs, funcs,
		1238	formats, format_count, type);
		1239	}
3031	serge	1240	EXPORT_SYMBOL(drm_plane_init);
		1241
4075	Serge	1242	/**
		1243	* drm_plane_cleanup - Clean up the core plane usage
		1244	* @plane: plane to cleanup
		1245	*
		1246	* This function cleans up @plane and removes it from the DRM mode setting
		1247	* core. Note that the function does not free the plane structure itself,
		1248	* this is the responsibility of the caller.
		1249	*/
3031	serge	1250	void drm_plane_cleanup(struct drm_plane *plane)
		1251	{
		1252	struct drm_device *dev = plane->dev;
		1253
3480	Serge	1254	drm_modeset_lock_all(dev);
3031	serge	1255	kfree(plane->format_types);
		1256	drm_mode_object_put(dev, &plane->base);
5060	serge	1257
		1258	BUG_ON(list_empty(&plane->head));
		1259
6084	serge	1260	list_del(&plane->head);
5060	serge	1261	dev->mode_config.num_total_plane--;
		1262	if (plane->type == DRM_PLANE_TYPE_OVERLAY)
		1263	dev->mode_config.num_overlay_plane--;
3480	Serge	1264	drm_modeset_unlock_all(dev);
5271	serge	1265
		1266	WARN_ON(plane->state && !plane->funcs->atomic_destroy_state);
		1267	if (plane->state && plane->funcs->atomic_destroy_state)
		1268	plane->funcs->atomic_destroy_state(plane, plane->state);
		1269
		1270	memset(plane, 0, sizeof(*plane));
3031	serge	1271	}
		1272	EXPORT_SYMBOL(drm_plane_cleanup);
		1273
1123	serge	1274	/**
5271	serge	1275	* drm_plane_index - find the index of a registered plane
		1276	* @plane: plane to find index for
		1277	*
		1278	* Given a registered plane, return the index of that CRTC within a DRM
		1279	* device's list of planes.
		1280	*/
		1281	unsigned int drm_plane_index(struct drm_plane *plane)
		1282	{
		1283	unsigned int index = 0;
		1284	struct drm_plane *tmp;
		1285
6084	serge	1286	drm_for_each_plane(tmp, plane->dev) {
5271	serge	1287	if (tmp == plane)
		1288	return index;
		1289
		1290	index++;
		1291	}
		1292
		1293	BUG();
		1294	}
		1295	EXPORT_SYMBOL(drm_plane_index);
		1296
		1297	/**
6084	serge	1298	* drm_plane_from_index - find the registered plane at an index
		1299	* @dev: DRM device
		1300	* @idx: index of registered plane to find for
		1301	*
		1302	* Given a plane index, return the registered plane from DRM device's
		1303	* list of planes with matching index.
		1304	*/
		1305	struct drm_plane *
		1306	drm_plane_from_index(struct drm_device *dev, int idx)
		1307	{
		1308	struct drm_plane *plane;
		1309	unsigned int i = 0;
		1310
		1311	drm_for_each_plane(plane, dev) {
		1312	if (i == idx)
		1313	return plane;
		1314	i++;
		1315	}
		1316	return NULL;
		1317	}
		1318	EXPORT_SYMBOL(drm_plane_from_index);
		1319
		1320	/**
4075	Serge	1321	* drm_plane_force_disable - Forcibly disable a plane
		1322	* @plane: plane to disable
		1323	*
		1324	* Forces the plane to be disabled.
		1325	*
		1326	* Used when the plane's current framebuffer is destroyed,
		1327	* and when restoring fbdev mode.
		1328	*/
		1329	void drm_plane_force_disable(struct drm_plane *plane)
		1330	{
		1331	int ret;
		1332
5271	serge	1333	if (!plane->fb)
4075	Serge	1334	return;
		1335
5271	serge	1336	plane->old_fb = plane->fb;
4075	Serge	1337	ret = plane->funcs->disable_plane(plane);
5060	serge	1338	if (ret) {
4075	Serge	1339	DRM_ERROR("failed to disable plane with busy fb\n");
5271	serge	1340	plane->old_fb = NULL;
5060	serge	1341	return;
		1342	}
4075	Serge	1343	/* disconnect the plane from the fb and crtc: */
6084	serge	1344	drm_framebuffer_unreference(plane->old_fb);
5271	serge	1345	plane->old_fb = NULL;
4075	Serge	1346	plane->fb = NULL;
		1347	plane->crtc = NULL;
		1348	}
		1349	EXPORT_SYMBOL(drm_plane_force_disable);
		1350
6084	serge	1351	static int drm_mode_create_standard_properties(struct drm_device *dev)
1123	serge	1352	{
6084	serge	1353	struct drm_property *prop;
1123	serge	1354
		1355	/*
		1356	* Standard properties (apply to all connectors)
		1357	*/
6084	serge	1358	prop = drm_property_create(dev, DRM_MODE_PROP_BLOB \|
1123	serge	1359	DRM_MODE_PROP_IMMUTABLE,
		1360	"EDID", 0);
6084	serge	1361	if (!prop)
		1362	return -ENOMEM;
		1363	dev->mode_config.edid_property = prop;
1123	serge	1364
6084	serge	1365	prop = drm_property_create_enum(dev, 0,
3031	serge	1366	"DPMS", drm_dpms_enum_list,
		1367	ARRAY_SIZE(drm_dpms_enum_list));
6084	serge	1368	if (!prop)
		1369	return -ENOMEM;
		1370	dev->mode_config.dpms_property = prop;
1123	serge	1371
6084	serge	1372	prop = drm_property_create(dev,
		1373	DRM_MODE_PROP_BLOB \|
		1374	DRM_MODE_PROP_IMMUTABLE,
		1375	"PATH", 0);
		1376	if (!prop)
		1377	return -ENOMEM;
		1378	dev->mode_config.path_property = prop;
5060	serge	1379
6084	serge	1380	prop = drm_property_create(dev,
		1381	DRM_MODE_PROP_BLOB \|
		1382	DRM_MODE_PROP_IMMUTABLE,
		1383	"TILE", 0);
		1384	if (!prop)
		1385	return -ENOMEM;
		1386	dev->mode_config.tile_property = prop;
5271	serge	1387
6084	serge	1388	prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
5060	serge	1389	"type", drm_plane_type_enum_list,
		1390	ARRAY_SIZE(drm_plane_type_enum_list));
6084	serge	1391	if (!prop)
		1392	return -ENOMEM;
		1393	dev->mode_config.plane_type_property = prop;
5060	serge	1394
6084	serge	1395	prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
		1396	"SRC_X", 0, UINT_MAX);
		1397	if (!prop)
		1398	return -ENOMEM;
		1399	dev->mode_config.prop_src_x = prop;
		1400
		1401	prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
		1402	"SRC_Y", 0, UINT_MAX);
		1403	if (!prop)
		1404	return -ENOMEM;
		1405	dev->mode_config.prop_src_y = prop;
		1406
		1407	prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
		1408	"SRC_W", 0, UINT_MAX);
		1409	if (!prop)
		1410	return -ENOMEM;
		1411	dev->mode_config.prop_src_w = prop;
		1412
		1413	prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
		1414	"SRC_H", 0, UINT_MAX);
		1415	if (!prop)
		1416	return -ENOMEM;
		1417	dev->mode_config.prop_src_h = prop;
		1418
		1419	prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
		1420	"CRTC_X", INT_MIN, INT_MAX);
		1421	if (!prop)
		1422	return -ENOMEM;
		1423	dev->mode_config.prop_crtc_x = prop;
		1424
		1425	prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
		1426	"CRTC_Y", INT_MIN, INT_MAX);
		1427	if (!prop)
		1428	return -ENOMEM;
		1429	dev->mode_config.prop_crtc_y = prop;
		1430
		1431	prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
		1432	"CRTC_W", 0, INT_MAX);
		1433	if (!prop)
		1434	return -ENOMEM;
		1435	dev->mode_config.prop_crtc_w = prop;
		1436
		1437	prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
		1438	"CRTC_H", 0, INT_MAX);
		1439	if (!prop)
		1440	return -ENOMEM;
		1441	dev->mode_config.prop_crtc_h = prop;
		1442
		1443	prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
		1444	"FB_ID", DRM_MODE_OBJECT_FB);
		1445	if (!prop)
		1446	return -ENOMEM;
		1447	dev->mode_config.prop_fb_id = prop;
		1448
		1449	prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
		1450	"CRTC_ID", DRM_MODE_OBJECT_CRTC);
		1451	if (!prop)
		1452	return -ENOMEM;
		1453	dev->mode_config.prop_crtc_id = prop;
		1454
		1455	prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC,
		1456	"ACTIVE");
		1457	if (!prop)
		1458	return -ENOMEM;
		1459	dev->mode_config.prop_active = prop;
		1460
		1461	prop = drm_property_create(dev,
		1462	DRM_MODE_PROP_ATOMIC \| DRM_MODE_PROP_BLOB,
		1463	"MODE_ID", 0);
		1464	if (!prop)
		1465	return -ENOMEM;
		1466	dev->mode_config.prop_mode_id = prop;
		1467
5060	serge	1468	return 0;
		1469	}
		1470
1123	serge	1471	/**
		1472	* drm_mode_create_dvi_i_properties - create DVI-I specific connector properties
		1473	* @dev: DRM device
		1474	*
		1475	* Called by a driver the first time a DVI-I connector is made.
		1476	*/
		1477	int drm_mode_create_dvi_i_properties(struct drm_device *dev)
		1478	{
		1479	struct drm_property *dvi_i_selector;
		1480	struct drm_property *dvi_i_subconnector;
		1481
		1482	if (dev->mode_config.dvi_i_select_subconnector_property)
		1483	return 0;
		1484
		1485	dvi_i_selector =
3031	serge	1486	drm_property_create_enum(dev, 0,
1123	serge	1487	"select subconnector",
3031	serge	1488	drm_dvi_i_select_enum_list,
1123	serge	1489	ARRAY_SIZE(drm_dvi_i_select_enum_list));
		1490	dev->mode_config.dvi_i_select_subconnector_property = dvi_i_selector;
		1491
3031	serge	1492	dvi_i_subconnector = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1123	serge	1493	"subconnector",
3031	serge	1494	drm_dvi_i_subconnector_enum_list,
1123	serge	1495	ARRAY_SIZE(drm_dvi_i_subconnector_enum_list));
		1496	dev->mode_config.dvi_i_subconnector_property = dvi_i_subconnector;
		1497
		1498	return 0;
		1499	}
		1500	EXPORT_SYMBOL(drm_mode_create_dvi_i_properties);
		1501
		1502	/**
		1503	* drm_create_tv_properties - create TV specific connector properties
		1504	* @dev: DRM device
		1505	* @num_modes: number of different TV formats (modes) supported
		1506	* @modes: array of pointers to strings containing name of each format
		1507	*
		1508	* Called by a driver's TV initialization routine, this function creates
		1509	* the TV specific connector properties for a given device. Caller is
		1510	* responsible for allocating a list of format names and passing them to
		1511	* this routine.
		1512	*/
5271	serge	1513	int drm_mode_create_tv_properties(struct drm_device *dev,
		1514	unsigned int num_modes,
6084	serge	1515	const char * const modes[])
1123	serge	1516	{
		1517	struct drm_property *tv_selector;
		1518	struct drm_property *tv_subconnector;
5271	serge	1519	unsigned int i;
1123	serge	1520
		1521	if (dev->mode_config.tv_select_subconnector_property)
		1522	return 0;
		1523
		1524	/*
		1525	* Basic connector properties
		1526	*/
3031	serge	1527	tv_selector = drm_property_create_enum(dev, 0,
1123	serge	1528	"select subconnector",
3031	serge	1529	drm_tv_select_enum_list,
1123	serge	1530	ARRAY_SIZE(drm_tv_select_enum_list));
6084	serge	1531	if (!tv_selector)
		1532	goto nomem;
		1533
1123	serge	1534	dev->mode_config.tv_select_subconnector_property = tv_selector;
		1535
		1536	tv_subconnector =
3031	serge	1537	drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
		1538	"subconnector",
		1539	drm_tv_subconnector_enum_list,
1123	serge	1540	ARRAY_SIZE(drm_tv_subconnector_enum_list));
6084	serge	1541	if (!tv_subconnector)
		1542	goto nomem;
1123	serge	1543	dev->mode_config.tv_subconnector_property = tv_subconnector;
		1544
		1545	/*
		1546	* Other, TV specific properties: margins & TV modes.
		1547	*/
		1548	dev->mode_config.tv_left_margin_property =
3031	serge	1549	drm_property_create_range(dev, 0, "left margin", 0, 100);
6084	serge	1550	if (!dev->mode_config.tv_left_margin_property)
		1551	goto nomem;
1123	serge	1552
		1553	dev->mode_config.tv_right_margin_property =
3031	serge	1554	drm_property_create_range(dev, 0, "right margin", 0, 100);
6084	serge	1555	if (!dev->mode_config.tv_right_margin_property)
		1556	goto nomem;
1123	serge	1557
		1558	dev->mode_config.tv_top_margin_property =
3031	serge	1559	drm_property_create_range(dev, 0, "top margin", 0, 100);
6084	serge	1560	if (!dev->mode_config.tv_top_margin_property)
		1561	goto nomem;
1123	serge	1562
		1563	dev->mode_config.tv_bottom_margin_property =
3031	serge	1564	drm_property_create_range(dev, 0, "bottom margin", 0, 100);
6084	serge	1565	if (!dev->mode_config.tv_bottom_margin_property)
		1566	goto nomem;
1123	serge	1567
		1568	dev->mode_config.tv_mode_property =
		1569	drm_property_create(dev, DRM_MODE_PROP_ENUM,
		1570	"mode", num_modes);
6084	serge	1571	if (!dev->mode_config.tv_mode_property)
		1572	goto nomem;
		1573
1123	serge	1574	for (i = 0; i < num_modes; i++)
		1575	drm_property_add_enum(dev->mode_config.tv_mode_property, i,
		1576	i, modes[i]);
		1577
1179	serge	1578	dev->mode_config.tv_brightness_property =
3031	serge	1579	drm_property_create_range(dev, 0, "brightness", 0, 100);
6084	serge	1580	if (!dev->mode_config.tv_brightness_property)
		1581	goto nomem;
1179	serge	1582
		1583	dev->mode_config.tv_contrast_property =
3031	serge	1584	drm_property_create_range(dev, 0, "contrast", 0, 100);
6084	serge	1585	if (!dev->mode_config.tv_contrast_property)
		1586	goto nomem;
1179	serge	1587
		1588	dev->mode_config.tv_flicker_reduction_property =
3031	serge	1589	drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
6084	serge	1590	if (!dev->mode_config.tv_flicker_reduction_property)
		1591	goto nomem;
1179	serge	1592
		1593	dev->mode_config.tv_overscan_property =
3031	serge	1594	drm_property_create_range(dev, 0, "overscan", 0, 100);
6084	serge	1595	if (!dev->mode_config.tv_overscan_property)
		1596	goto nomem;
1179	serge	1597
		1598	dev->mode_config.tv_saturation_property =
3031	serge	1599	drm_property_create_range(dev, 0, "saturation", 0, 100);
6084	serge	1600	if (!dev->mode_config.tv_saturation_property)
		1601	goto nomem;
1179	serge	1602
		1603	dev->mode_config.tv_hue_property =
3031	serge	1604	drm_property_create_range(dev, 0, "hue", 0, 100);
6084	serge	1605	if (!dev->mode_config.tv_hue_property)
		1606	goto nomem;
1179	serge	1607
1123	serge	1608	return 0;
6084	serge	1609	nomem:
		1610	return -ENOMEM;
1123	serge	1611	}
		1612	EXPORT_SYMBOL(drm_mode_create_tv_properties);
		1613
		1614	/**
		1615	* drm_mode_create_scaling_mode_property - create scaling mode property
		1616	* @dev: DRM device
		1617	*
		1618	* Called by a driver the first time it's needed, must be attached to desired
		1619	* connectors.
		1620	*/
		1621	int drm_mode_create_scaling_mode_property(struct drm_device *dev)
		1622	{
		1623	struct drm_property *scaling_mode;
		1624
		1625	if (dev->mode_config.scaling_mode_property)
		1626	return 0;
		1627
		1628	scaling_mode =
3031	serge	1629	drm_property_create_enum(dev, 0, "scaling mode",
		1630	drm_scaling_mode_enum_list,
1123	serge	1631	ARRAY_SIZE(drm_scaling_mode_enum_list));
		1632
		1633	dev->mode_config.scaling_mode_property = scaling_mode;
		1634
		1635	return 0;
		1636	}
		1637	EXPORT_SYMBOL(drm_mode_create_scaling_mode_property);
		1638
		1639	/**
5060	serge	1640	* drm_mode_create_aspect_ratio_property - create aspect ratio property
		1641	* @dev: DRM device
		1642	*
		1643	* Called by a driver the first time it's needed, must be attached to desired
		1644	* connectors.
		1645	*
		1646	* Returns:
5271	serge	1647	* Zero on success, negative errno on failure.
5060	serge	1648	*/
		1649	int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
		1650	{
		1651	if (dev->mode_config.aspect_ratio_property)
		1652	return 0;
		1653
		1654	dev->mode_config.aspect_ratio_property =
		1655	drm_property_create_enum(dev, 0, "aspect ratio",
		1656	drm_aspect_ratio_enum_list,
		1657	ARRAY_SIZE(drm_aspect_ratio_enum_list));
		1658
		1659	if (dev->mode_config.aspect_ratio_property == NULL)
		1660	return -ENOMEM;
		1661
		1662	return 0;
		1663	}
		1664	EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property);
		1665
		1666	/**
1321	serge	1667	* drm_mode_create_dirty_property - create dirty property
		1668	* @dev: DRM device
		1669	*
		1670	* Called by a driver the first time it's needed, must be attached to desired
		1671	* connectors.
		1672	*/
		1673	int drm_mode_create_dirty_info_property(struct drm_device *dev)
		1674	{
		1675	struct drm_property *dirty_info;
		1676
		1677	if (dev->mode_config.dirty_info_property)
		1678	return 0;
		1679
		1680	dirty_info =
3031	serge	1681	drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
1321	serge	1682	"dirty",
3031	serge	1683	drm_dirty_info_enum_list,
1321	serge	1684	ARRAY_SIZE(drm_dirty_info_enum_list));
		1685	dev->mode_config.dirty_info_property = dirty_info;
		1686
		1687	return 0;
		1688	}
		1689	EXPORT_SYMBOL(drm_mode_create_dirty_info_property);
		1690
5271	serge	1691	/**
		1692	* drm_mode_create_suggested_offset_properties - create suggests offset properties
		1693	* @dev: DRM device
		1694	*
		1695	* Create the the suggested x/y offset property for connectors.
		1696	*/
		1697	int drm_mode_create_suggested_offset_properties(struct drm_device *dev)
		1698	{
		1699	if (dev->mode_config.suggested_x_property && dev->mode_config.suggested_y_property)
		1700	return 0;
		1701
		1702	dev->mode_config.suggested_x_property =
		1703	drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested X", 0, 0xffffffff);
		1704
		1705	dev->mode_config.suggested_y_property =
		1706	drm_property_create_range(dev, DRM_MODE_PROP_IMMUTABLE, "suggested Y", 0, 0xffffffff);
		1707
		1708	if (dev->mode_config.suggested_x_property == NULL \|\|
		1709	dev->mode_config.suggested_y_property == NULL)
		1710	return -ENOMEM;
		1711	return 0;
		1712	}
		1713	EXPORT_SYMBOL(drm_mode_create_suggested_offset_properties);
		1714
1123	serge	1715	#if 0
		1716	/**
		1717	* drm_mode_getresources - get graphics configuration
3480	Serge	1718	* @dev: drm device for the ioctl
		1719	* @data: data pointer for the ioctl
		1720	* @file_priv: drm file for the ioctl call
1123	serge	1721	*
		1722	* Construct a set of configuration description structures and return
		1723	* them to the user, including CRTC, connector and framebuffer configuration.
		1724	*
		1725	* Called by the user via ioctl.
		1726	*
5060	serge	1727	* Returns:
5271	serge	1728	* Zero on success, negative errno on failure.
1123	serge	1729	*/
		1730	int drm_mode_getresources(struct drm_device dev, void data,
		1731	struct drm_file *file_priv)
		1732	{
		1733	struct drm_mode_card_res *card_res = data;
		1734	struct list_head *lh;
		1735	struct drm_framebuffer *fb;
		1736	struct drm_connector *connector;
		1737	struct drm_crtc *crtc;
		1738	struct drm_encoder *encoder;
		1739	int ret = 0;
		1740	int connector_count = 0;
		1741	int crtc_count = 0;
		1742	int fb_count = 0;
		1743	int encoder_count = 0;
6084	serge	1744	int copied = 0;
1123	serge	1745	uint32_t __user *fb_id;
		1746	uint32_t __user *crtc_id;
		1747	uint32_t __user *connector_id;
		1748	uint32_t __user *encoder_id;
		1749
1963	serge	1750	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		1751	return -EINVAL;
		1752
1123	serge	1753
3480	Serge	1754	mutex_lock(&file_priv->fbs_lock);
1123	serge	1755	/*
		1756	* For the non-control nodes we need to limit the list of resources
		1757	* by IDs in the group list for this node
		1758	*/
		1759	list_for_each(lh, &file_priv->fbs)
		1760	fb_count++;
		1761
3480	Serge	1762	/* handle this in 4 parts */
		1763	/* FBs */
		1764	if (card_res->count_fbs >= fb_count) {
		1765	copied = 0;
		1766	fb_id = (uint32_t __user *)(unsigned long)card_res->fb_id_ptr;
		1767	list_for_each_entry(fb, &file_priv->fbs, filp_head) {
		1768	if (put_user(fb->base.id, fb_id + copied)) {
		1769	mutex_unlock(&file_priv->fbs_lock);
		1770	return -EFAULT;
		1771	}
		1772	copied++;
		1773	}
		1774	}
		1775	card_res->count_fbs = fb_count;
		1776	mutex_unlock(&file_priv->fbs_lock);
		1777
5271	serge	1778	/* mode_config.mutex protects the connector list against e.g. DP MST
		1779	* connector hot-adding. CRTC/Plane lists are invariant. */
		1780	mutex_lock(&dev->mode_config.mutex);
6084	serge	1781	drm_for_each_crtc(crtc, dev)
		1782	crtc_count++;
1123	serge	1783
6084	serge	1784	drm_for_each_connector(connector, dev)
		1785	connector_count++;
1123	serge	1786
6084	serge	1787	drm_for_each_encoder(encoder, dev)
		1788	encoder_count++;
1123	serge	1789
		1790	card_res->max_height = dev->mode_config.max_height;
		1791	card_res->min_height = dev->mode_config.min_height;
		1792	card_res->max_width = dev->mode_config.max_width;
		1793	card_res->min_width = dev->mode_config.min_width;
		1794
		1795	/* CRTCs */
		1796	if (card_res->count_crtcs >= crtc_count) {
		1797	copied = 0;
		1798	crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr;
6084	serge	1799	drm_for_each_crtc(crtc, dev) {
		1800	DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
		1801	if (put_user(crtc->base.id, crtc_id + copied)) {
		1802	ret = -EFAULT;
		1803	goto out;
1123	serge	1804	}
6084	serge	1805	copied++;
1123	serge	1806	}
		1807	}
		1808	card_res->count_crtcs = crtc_count;
		1809
		1810	/* Encoders */
		1811	if (card_res->count_encoders >= encoder_count) {
		1812	copied = 0;
		1813	encoder_id = (uint32_t __user *)(unsigned long)card_res->encoder_id_ptr;
6084	serge	1814	drm_for_each_encoder(encoder, dev) {
		1815	DRM_DEBUG_KMS("[ENCODER:%d:%s]\n", encoder->base.id,
		1816	encoder->name);
		1817	if (put_user(encoder->base.id, encoder_id +
		1818	copied)) {
		1819	ret = -EFAULT;
		1820	goto out;
1123	serge	1821	}
6084	serge	1822	copied++;
1123	serge	1823	}
		1824	}
		1825	card_res->count_encoders = encoder_count;
		1826
		1827	/* Connectors */
		1828	if (card_res->count_connectors >= connector_count) {
		1829	copied = 0;
		1830	connector_id = (uint32_t __user *)(unsigned long)card_res->connector_id_ptr;
6084	serge	1831	drm_for_each_connector(connector, dev) {
		1832	DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
		1833	connector->base.id,
		1834	connector->name);
		1835	if (put_user(connector->base.id,
		1836	connector_id + copied)) {
		1837	ret = -EFAULT;
		1838	goto out;
1123	serge	1839	}
6084	serge	1840	copied++;
1123	serge	1841	}
		1842	}
		1843	card_res->count_connectors = connector_count;
		1844
1963	serge	1845	DRM_DEBUG_KMS("CRTC[%d] CONNECTORS[%d] ENCODERS[%d]\n", card_res->count_crtcs,
1123	serge	1846	card_res->count_connectors, card_res->count_encoders);
		1847
		1848	out:
5271	serge	1849	mutex_unlock(&dev->mode_config.mutex);
1123	serge	1850	return ret;
		1851	}
		1852
		1853	/**
		1854	* drm_mode_getcrtc - get CRTC configuration
3480	Serge	1855	* @dev: drm device for the ioctl
		1856	* @data: data pointer for the ioctl
		1857	* @file_priv: drm file for the ioctl call
1123	serge	1858	*
		1859	* Construct a CRTC configuration structure to return to the user.
		1860	*
		1861	* Called by the user via ioctl.
		1862	*
5060	serge	1863	* Returns:
5271	serge	1864	* Zero on success, negative errno on failure.
1123	serge	1865	*/
		1866	int drm_mode_getcrtc(struct drm_device *dev,
		1867	void data, struct drm_file file_priv)
		1868	{
		1869	struct drm_mode_crtc *crtc_resp = data;
		1870	struct drm_crtc *crtc;
		1871
1963	serge	1872	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		1873	return -EINVAL;
		1874
5060	serge	1875	crtc = drm_crtc_find(dev, crtc_resp->crtc_id);
5271	serge	1876	if (!crtc)
		1877	return -ENOENT;
1123	serge	1878
5271	serge	1879	drm_modeset_lock_crtc(crtc, crtc->primary);
1123	serge	1880	crtc_resp->gamma_size = crtc->gamma_size;
5060	serge	1881	if (crtc->primary->fb)
		1882	crtc_resp->fb_id = crtc->primary->fb->base.id;
1123	serge	1883	else
		1884	crtc_resp->fb_id = 0;
		1885
6084	serge	1886	if (crtc->state) {
		1887	crtc_resp->x = crtc->primary->state->src_x >> 16;
		1888	crtc_resp->y = crtc->primary->state->src_y >> 16;
		1889	if (crtc->state->enable) {
		1890	drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->state->mode);
		1891	crtc_resp->mode_valid = 1;
1123	serge	1892
6084	serge	1893	} else {
		1894	crtc_resp->mode_valid = 0;
		1895	}
		1896	} else {
		1897	crtc_resp->x = crtc->x;
		1898	crtc_resp->y = crtc->y;
		1899	if (crtc->enabled) {
		1900	drm_mode_convert_to_umode(&crtc_resp->mode, &crtc->mode);
		1901	crtc_resp->mode_valid = 1;
1123	serge	1902
6084	serge	1903	} else {
		1904	crtc_resp->mode_valid = 0;
		1905	}
1123	serge	1906	}
5271	serge	1907	drm_modeset_unlock_crtc(crtc);
1123	serge	1908
5271	serge	1909	return 0;
1123	serge	1910	}
		1911
4560	Serge	1912	static bool drm_mode_expose_to_userspace(const struct drm_display_mode *mode,
		1913	const struct drm_file *file_priv)
		1914	{
		1915	/*
		1916	* If user-space hasn't configured the driver to expose the stereo 3D
		1917	* modes, don't expose them.
		1918	*/
		1919	if (!file_priv->stereo_allowed && drm_mode_is_stereo(mode))
		1920	return false;
		1921
		1922	return true;
		1923	}
		1924
5271	serge	1925	static struct drm_encoder drm_connector_get_encoder(struct drm_connector connector)
		1926	{
		1927	/* For atomic drivers only state objects are synchronously updated and
		1928	* protected by modeset locks, so check those first. */
		1929	if (connector->state)
		1930	return connector->state->best_encoder;
		1931	return connector->encoder;
		1932	}
		1933
6084	serge	1934	/* helper for getconnector and getproperties ioctls */
		1935	static int get_properties(struct drm_mode_object *obj, bool atomic,
		1936	uint32_t __user prop_ptr, uint64_t __user prop_values,
		1937	uint32_t *arg_count_props)
		1938	{
		1939	int props_count;
		1940	int i, ret, copied;
		1941
		1942	props_count = obj->properties->count;
		1943	if (!atomic)
		1944	props_count -= obj->properties->atomic_count;
		1945
		1946	if ((*arg_count_props >= props_count) && props_count) {
		1947	for (i = 0, copied = 0; copied < props_count; i++) {
		1948	struct drm_property *prop = obj->properties->properties[i];
		1949	uint64_t val;
		1950
		1951	if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic)
		1952	continue;
		1953
		1954	ret = drm_object_property_get_value(obj, prop, &val);
		1955	if (ret)
		1956	return ret;
		1957
		1958	if (put_user(prop->base.id, prop_ptr + copied))
		1959	return -EFAULT;
		1960
		1961	if (put_user(val, prop_values + copied))
		1962	return -EFAULT;
		1963
		1964	copied++;
		1965	}
		1966	}
		1967	*arg_count_props = props_count;
		1968
		1969	return 0;
		1970	}
		1971
1123	serge	1972	/**
		1973	* drm_mode_getconnector - get connector configuration
3480	Serge	1974	* @dev: drm device for the ioctl
		1975	* @data: data pointer for the ioctl
		1976	* @file_priv: drm file for the ioctl call
1123	serge	1977	*
		1978	* Construct a connector configuration structure to return to the user.
		1979	*
		1980	* Called by the user via ioctl.
		1981	*
5060	serge	1982	* Returns:
5271	serge	1983	* Zero on success, negative errno on failure.
1123	serge	1984	*/
		1985	int drm_mode_getconnector(struct drm_device dev, void data,
		1986	struct drm_file *file_priv)
		1987	{
		1988	struct drm_mode_get_connector *out_resp = data;
		1989	struct drm_connector *connector;
5271	serge	1990	struct drm_encoder *encoder;
1123	serge	1991	struct drm_display_mode *mode;
		1992	int mode_count = 0;
		1993	int encoders_count = 0;
		1994	int ret = 0;
		1995	int copied = 0;
		1996	int i;
		1997	struct drm_mode_modeinfo u_mode;
		1998	struct drm_mode_modeinfo __user *mode_ptr;
		1999	uint32_t __user *encoder_ptr;
		2000
1963	serge	2001	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		2002	return -EINVAL;
		2003
1123	serge	2004	memset(&u_mode, 0, sizeof(struct drm_mode_modeinfo));
		2005
1963	serge	2006	DRM_DEBUG_KMS("[CONNECTOR:%d:?]\n", out_resp->connector_id);
1123	serge	2007
		2008	mutex_lock(&dev->mode_config.mutex);
		2009
5060	serge	2010	connector = drm_connector_find(dev, out_resp->connector_id);
		2011	if (!connector) {
4560	Serge	2012	ret = -ENOENT;
6084	serge	2013	goto out_unlock;
1123	serge	2014	}
		2015
6084	serge	2016	for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++)
		2017	if (connector->encoder_ids[i] != 0)
1123	serge	2018	encoders_count++;
		2019
		2020	if (out_resp->count_modes == 0) {
		2021	connector->funcs->fill_modes(connector,
		2022	dev->mode_config.max_width,
		2023	dev->mode_config.max_height);
		2024	}
		2025
		2026	/* delayed so we get modes regardless of pre-fill_modes state */
		2027	list_for_each_entry(mode, &connector->modes, head)
4560	Serge	2028	if (drm_mode_expose_to_userspace(mode, file_priv))
6084	serge	2029	mode_count++;
1123	serge	2030
		2031	out_resp->connector_id = connector->base.id;
		2032	out_resp->connector_type = connector->connector_type;
		2033	out_resp->connector_type_id = connector->connector_type_id;
		2034	out_resp->mm_width = connector->display_info.width_mm;
		2035	out_resp->mm_height = connector->display_info.height_mm;
		2036	out_resp->subpixel = connector->display_info.subpixel_order;
		2037	out_resp->connection = connector->status;
6084	serge	2038
5060	serge	2039	drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
5271	serge	2040	encoder = drm_connector_get_encoder(connector);
		2041	if (encoder)
		2042	out_resp->encoder_id = encoder->base.id;
1123	serge	2043	else
		2044	out_resp->encoder_id = 0;
		2045
		2046	/*
		2047	* This ioctl is called twice, once to determine how much space is
		2048	* needed, and the 2nd time to fill it.
		2049	*/
		2050	if ((out_resp->count_modes >= mode_count) && mode_count) {
		2051	copied = 0;
3031	serge	2052	mode_ptr = (struct drm_mode_modeinfo __user *)(unsigned long)out_resp->modes_ptr;
1123	serge	2053	list_for_each_entry(mode, &connector->modes, head) {
4560	Serge	2054	if (!drm_mode_expose_to_userspace(mode, file_priv))
		2055	continue;
		2056
6084	serge	2057	drm_mode_convert_to_umode(&u_mode, mode);
1123	serge	2058	if (copy_to_user(mode_ptr + copied,
		2059	&u_mode, sizeof(u_mode))) {
		2060	ret = -EFAULT;
		2061	goto out;
		2062	}
		2063	copied++;
		2064	}
		2065	}
		2066	out_resp->count_modes = mode_count;
		2067
6084	serge	2068	ret = get_properties(&connector->base, file_priv->atomic,
		2069	(uint32_t __user *)(unsigned long)(out_resp->props_ptr),
		2070	(uint64_t __user *)(unsigned long)(out_resp->prop_values_ptr),
		2071	&out_resp->count_props);
		2072	if (ret)
		2073	goto out;
1123	serge	2074
		2075	if ((out_resp->count_encoders >= encoders_count) && encoders_count) {
		2076	copied = 0;
3031	serge	2077	encoder_ptr = (uint32_t __user *)(unsigned long)(out_resp->encoders_ptr);
1123	serge	2078	for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
		2079	if (connector->encoder_ids[i] != 0) {
		2080	if (put_user(connector->encoder_ids[i],
		2081	encoder_ptr + copied)) {
		2082	ret = -EFAULT;
		2083	goto out;
		2084	}
		2085	copied++;
		2086	}
		2087	}
		2088	}
		2089	out_resp->count_encoders = encoders_count;
		2090
		2091	out:
6084	serge	2092	drm_modeset_unlock(&dev->mode_config.connection_mutex);
		2093
		2094	out_unlock:
1123	serge	2095	mutex_unlock(&dev->mode_config.mutex);
3480	Serge	2096
1123	serge	2097	return ret;
		2098	}
		2099
5271	serge	2100	static struct drm_crtc drm_encoder_get_crtc(struct drm_encoder encoder)
		2101	{
		2102	struct drm_connector *connector;
		2103	struct drm_device *dev = encoder->dev;
		2104	bool uses_atomic = false;
		2105
		2106	/* For atomic drivers only state objects are synchronously updated and
		2107	* protected by modeset locks, so check those first. */
6084	serge	2108	drm_for_each_connector(connector, dev) {
5271	serge	2109	if (!connector->state)
		2110	continue;
		2111
		2112	uses_atomic = true;
		2113
		2114	if (connector->state->best_encoder != encoder)
		2115	continue;
		2116
		2117	return connector->state->crtc;
		2118	}
		2119
		2120	/* Don't return stale data (e.g. pending async disable). */
		2121	if (uses_atomic)
		2122	return NULL;
		2123
		2124	return encoder->crtc;
		2125	}
		2126
5060	serge	2127	/**
		2128	* drm_mode_getencoder - get encoder configuration
		2129	* @dev: drm device for the ioctl
		2130	* @data: data pointer for the ioctl
		2131	* @file_priv: drm file for the ioctl call
		2132	*
		2133	* Construct a encoder configuration structure to return to the user.
		2134	*
		2135	* Called by the user via ioctl.
		2136	*
		2137	* Returns:
5271	serge	2138	* Zero on success, negative errno on failure.
5060	serge	2139	*/
1123	serge	2140	int drm_mode_getencoder(struct drm_device dev, void data,
		2141	struct drm_file *file_priv)
		2142	{
		2143	struct drm_mode_get_encoder *enc_resp = data;
		2144	struct drm_encoder *encoder;
5271	serge	2145	struct drm_crtc *crtc;
1123	serge	2146
1963	serge	2147	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		2148	return -EINVAL;
		2149
5060	serge	2150	encoder = drm_encoder_find(dev, enc_resp->encoder_id);
5271	serge	2151	if (!encoder)
		2152	return -ENOENT;
1123	serge	2153
5271	serge	2154	drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
		2155	crtc = drm_encoder_get_crtc(encoder);
		2156	if (crtc)
		2157	enc_resp->crtc_id = crtc->base.id;
1123	serge	2158	else
		2159	enc_resp->crtc_id = 0;
5271	serge	2160	drm_modeset_unlock(&dev->mode_config.connection_mutex);
		2161
1123	serge	2162	enc_resp->encoder_type = encoder->encoder_type;
		2163	enc_resp->encoder_id = encoder->base.id;
		2164	enc_resp->possible_crtcs = encoder->possible_crtcs;
		2165	enc_resp->possible_clones = encoder->possible_clones;
		2166
5271	serge	2167	return 0;
1123	serge	2168	}
		2169
		2170	/**
5060	serge	2171	* drm_mode_getplane_res - enumerate all plane resources
3031	serge	2172	* @dev: DRM device
		2173	* @data: ioctl data
		2174	* @file_priv: DRM file info
		2175	*
5060	serge	2176	* Construct a list of plane ids to return to the user.
		2177	*
		2178	* Called by the user via ioctl.
		2179	*
		2180	* Returns:
5271	serge	2181	* Zero on success, negative errno on failure.
3031	serge	2182	*/
		2183	int drm_mode_getplane_res(struct drm_device dev, void data,
6084	serge	2184	struct drm_file *file_priv)
3031	serge	2185	{
		2186	struct drm_mode_get_plane_res *plane_resp = data;
		2187	struct drm_mode_config *config;
		2188	struct drm_plane *plane;
		2189	uint32_t __user *plane_ptr;
5271	serge	2190	int copied = 0;
5060	serge	2191	unsigned num_planes;
3031	serge	2192
		2193	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		2194	return -EINVAL;
		2195
		2196	config = &dev->mode_config;
		2197
5060	serge	2198	if (file_priv->universal_planes)
		2199	num_planes = config->num_total_plane;
		2200	else
		2201	num_planes = config->num_overlay_plane;
		2202
3031	serge	2203	/*
		2204	* This ioctl is called twice, once to determine how much space is
		2205	* needed, and the 2nd time to fill it.
		2206	*/
5060	serge	2207	if (num_planes &&
		2208	(plane_resp->count_planes >= num_planes)) {
3031	serge	2209	plane_ptr = (uint32_t __user *)(unsigned long)plane_resp->plane_id_ptr;
		2210
5271	serge	2211	/* Plane lists are invariant, no locking needed. */
6084	serge	2212	drm_for_each_plane(plane, dev) {
5060	serge	2213	/*
		2214	* Unless userspace set the 'universal planes'
		2215	* capability bit, only advertise overlays.
		2216	*/
		2217	if (plane->type != DRM_PLANE_TYPE_OVERLAY &&
		2218	!file_priv->universal_planes)
		2219	continue;
		2220
5271	serge	2221	if (put_user(plane->base.id, plane_ptr + copied))
		2222	return -EFAULT;
3031	serge	2223	copied++;
		2224	}
		2225	}
5060	serge	2226	plane_resp->count_planes = num_planes;
3031	serge	2227
5271	serge	2228	return 0;
3031	serge	2229	}
		2230
		2231	/**
5060	serge	2232	* drm_mode_getplane - get plane configuration
3031	serge	2233	* @dev: DRM device
		2234	* @data: ioctl data
		2235	* @file_priv: DRM file info
		2236	*
5060	serge	2237	* Construct a plane configuration structure to return to the user.
		2238	*
		2239	* Called by the user via ioctl.
		2240	*
		2241	* Returns:
5271	serge	2242	* Zero on success, negative errno on failure.
3031	serge	2243	*/
		2244	int drm_mode_getplane(struct drm_device dev, void data,
6084	serge	2245	struct drm_file *file_priv)
3031	serge	2246	{
		2247	struct drm_mode_get_plane *plane_resp = data;
		2248	struct drm_plane *plane;
		2249	uint32_t __user *format_ptr;
		2250
		2251	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		2252	return -EINVAL;
		2253
5060	serge	2254	plane = drm_plane_find(dev, plane_resp->plane_id);
5271	serge	2255	if (!plane)
		2256	return -ENOENT;
3031	serge	2257
5271	serge	2258	drm_modeset_lock(&plane->mutex, NULL);
3031	serge	2259	if (plane->crtc)
		2260	plane_resp->crtc_id = plane->crtc->base.id;
		2261	else
		2262	plane_resp->crtc_id = 0;
		2263
		2264	if (plane->fb)
		2265	plane_resp->fb_id = plane->fb->base.id;
		2266	else
		2267	plane_resp->fb_id = 0;
5271	serge	2268	drm_modeset_unlock(&plane->mutex);
3031	serge	2269
		2270	plane_resp->plane_id = plane->base.id;
		2271	plane_resp->possible_crtcs = plane->possible_crtcs;
4075	Serge	2272	plane_resp->gamma_size = 0;
3031	serge	2273
		2274	/*
		2275	* This ioctl is called twice, once to determine how much space is
		2276	* needed, and the 2nd time to fill it.
		2277	*/
		2278	if (plane->format_count &&
		2279	(plane_resp->count_format_types >= plane->format_count)) {
		2280	format_ptr = (uint32_t __user *)(unsigned long)plane_resp->format_type_ptr;
		2281	if (copy_to_user(format_ptr,
		2282	plane->format_types,
		2283	sizeof(uint32_t) * plane->format_count)) {
5271	serge	2284	return -EFAULT;
3031	serge	2285	}
		2286	}
		2287	plane_resp->count_format_types = plane->format_count;
		2288
5271	serge	2289	return 0;
3031	serge	2290	}
6084	serge	2291	#endif
3031	serge	2292
6084	serge	2293	/**
		2294	* drm_plane_check_pixel_format - Check if the plane supports the pixel format
		2295	* @plane: plane to check for format support
		2296	* @format: the pixel format
		2297	*
		2298	* Returns:
		2299	* Zero of @plane has @format in its list of supported pixel formats, -EINVAL
		2300	* otherwise.
		2301	*/
		2302	int drm_plane_check_pixel_format(const struct drm_plane *plane, u32 format)
		2303	{
		2304	unsigned int i;
		2305
		2306	for (i = 0; i < plane->format_count; i++) {
		2307	if (format == plane->format_types[i])
		2308	return 0;
		2309	}
		2310
		2311	return -EINVAL;
		2312	}
		2313
		2314	static int check_src_coords(uint32_t src_x, uint32_t src_y,
		2315	uint32_t src_w, uint32_t src_h,
		2316	const struct drm_framebuffer *fb)
		2317	{
		2318	unsigned int fb_width, fb_height;
		2319
		2320	fb_width = fb->width << 16;
		2321	fb_height = fb->height << 16;
		2322
		2323	/* Make sure source coordinates are inside the fb. */
		2324	if (src_w > fb_width \|\|
		2325	src_x > fb_width - src_w \|\|
		2326	src_h > fb_height \|\|
		2327	src_y > fb_height - src_h) {
		2328	DRM_DEBUG_KMS("Invalid source coordinates "
		2329	"%u.%06ux%u.%06u+%u.%06u+%u.%06u\n",
		2330	src_w >> 16, ((src_w & 0xffff) * 15625) >> 10,
		2331	src_h >> 16, ((src_h & 0xffff) * 15625) >> 10,
		2332	src_x >> 16, ((src_x & 0xffff) * 15625) >> 10,
		2333	src_y >> 16, ((src_y & 0xffff) * 15625) >> 10);
		2334	return -ENOSPC;
		2335	}
		2336
		2337	return 0;
		2338	}
		2339
5060	serge	2340	/*
		2341	* setplane_internal - setplane handler for internal callers
3031	serge	2342	*
5060	serge	2343	* Note that we assume an extra reference has already been taken on fb. If the
		2344	* update fails, this reference will be dropped before return; if it succeeds,
		2345	* the previous framebuffer (if any) will be unreferenced instead.
		2346	*
		2347	* src_{x,y,w,h} are provided in 16.16 fixed point format
3031	serge	2348	*/
5271	serge	2349	static int __setplane_internal(struct drm_plane *plane,
6084	serge	2350	struct drm_crtc *crtc,
		2351	struct drm_framebuffer *fb,
		2352	int32_t crtc_x, int32_t crtc_y,
		2353	uint32_t crtc_w, uint32_t crtc_h,
		2354	/* src_{x,y,w,h} values are 16.16 fixed point */
		2355	uint32_t src_x, uint32_t src_y,
		2356	uint32_t src_w, uint32_t src_h)
3031	serge	2357	{
		2358	int ret = 0;
		2359
		2360	/* No fb means shut it down */
5060	serge	2361	if (!fb) {
5271	serge	2362	plane->old_fb = plane->fb;
5060	serge	2363	ret = plane->funcs->disable_plane(plane);
		2364	if (!ret) {
6084	serge	2365	plane->crtc = NULL;
		2366	plane->fb = NULL;
5060	serge	2367	} else {
5271	serge	2368	plane->old_fb = NULL;
5060	serge	2369	}
3031	serge	2370	goto out;
		2371	}
		2372
5060	serge	2373	/* Check whether this plane is usable on this CRTC */
		2374	if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) {
		2375	DRM_DEBUG_KMS("Invalid crtc for plane\n");
		2376	ret = -EINVAL;
3031	serge	2377	goto out;
		2378	}
		2379
		2380	/* Check whether this plane supports the fb pixel format. */
6084	serge	2381	ret = drm_plane_check_pixel_format(plane, fb->pixel_format);
		2382	if (ret) {
4075	Serge	2383	DRM_DEBUG_KMS("Invalid pixel format %s\n",
		2384	drm_get_format_name(fb->pixel_format));
3031	serge	2385	goto out;
		2386	}
		2387
6084	serge	2388	/* Give drivers some help against integer overflows */
		2389	if (crtc_w > INT_MAX \|\|
		2390	crtc_x > INT_MAX - (int32_t) crtc_w \|\|
		2391	crtc_h > INT_MAX \|\|
		2392	crtc_y > INT_MAX - (int32_t) crtc_h) {
		2393	DRM_DEBUG_KMS("Invalid CRTC coordinates %ux%u+%d+%d\n",
		2394	crtc_w, crtc_h, crtc_x, crtc_y);
		2395	ret = -ERANGE;
3031	serge	2396	goto out;
		2397	}
		2398
6084	serge	2399	ret = check_src_coords(src_x, src_y, src_w, src_h, fb);
		2400	if (ret)
		2401	goto out;
		2402
5271	serge	2403	plane->old_fb = plane->fb;
3031	serge	2404	ret = plane->funcs->update_plane(plane, crtc, fb,
5060	serge	2405	crtc_x, crtc_y, crtc_w, crtc_h,
		2406	src_x, src_y, src_w, src_h);
3031	serge	2407	if (!ret) {
		2408	plane->crtc = crtc;
		2409	plane->fb = fb;
3480	Serge	2410	fb = NULL;
5060	serge	2411	} else {
5271	serge	2412	plane->old_fb = NULL;
3031	serge	2413	}
		2414
		2415	out:
3480	Serge	2416	if (fb)
		2417	drm_framebuffer_unreference(fb);
5271	serge	2418	if (plane->old_fb)
		2419	drm_framebuffer_unreference(plane->old_fb);
		2420	plane->old_fb = NULL;
3031	serge	2421
		2422	return ret;
5271	serge	2423	}
5060	serge	2424
5271	serge	2425	static int setplane_internal(struct drm_plane *plane,
		2426	struct drm_crtc *crtc,
		2427	struct drm_framebuffer *fb,
		2428	int32_t crtc_x, int32_t crtc_y,
		2429	uint32_t crtc_w, uint32_t crtc_h,
		2430	/* src_{x,y,w,h} values are 16.16 fixed point */
		2431	uint32_t src_x, uint32_t src_y,
		2432	uint32_t src_w, uint32_t src_h)
		2433	{
		2434	int ret;
		2435
		2436	drm_modeset_lock_all(plane->dev);
		2437	ret = __setplane_internal(plane, crtc, fb,
		2438	crtc_x, crtc_y, crtc_w, crtc_h,
		2439	src_x, src_y, src_w, src_h);
		2440	drm_modeset_unlock_all(plane->dev);
		2441
		2442	return ret;
3031	serge	2443	}
5060	serge	2444
		2445	/**
		2446	* drm_mode_setplane - configure a plane's configuration
		2447	* @dev: DRM device
		2448	* @data: ioctl data*
		2449	* @file_priv: DRM file info
		2450	*
		2451	* Set plane configuration, including placement, fb, scaling, and other factors.
		2452	* Or pass a NULL fb to disable (planes may be disabled without providing a
		2453	* valid crtc).
		2454	*
		2455	* Returns:
5271	serge	2456	* Zero on success, negative errno on failure.
5060	serge	2457	*/
		2458	int drm_mode_setplane(struct drm_device dev, void data,
		2459	struct drm_file *file_priv)
		2460	{
		2461	struct drm_mode_set_plane *plane_req = data;
		2462	struct drm_plane *plane;
		2463	struct drm_crtc *crtc = NULL;
		2464	struct drm_framebuffer *fb = NULL;
		2465
		2466	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		2467	return -EINVAL;
		2468
		2469	/*
		2470	* First, find the plane, crtc, and fb objects. If not available,
		2471	* we don't bother to call the driver.
		2472	*/
5271	serge	2473	plane = drm_plane_find(dev, plane_req->plane_id);
		2474	if (!plane) {
5060	serge	2475	DRM_DEBUG_KMS("Unknown plane ID %d\n",
		2476	plane_req->plane_id);
		2477	return -ENOENT;
		2478	}
		2479
		2480	if (plane_req->fb_id) {
		2481	fb = drm_framebuffer_lookup(dev, plane_req->fb_id);
		2482	if (!fb) {
		2483	DRM_DEBUG_KMS("Unknown framebuffer ID %d\n",
		2484	plane_req->fb_id);
		2485	return -ENOENT;
		2486	}
		2487
5271	serge	2488	crtc = drm_crtc_find(dev, plane_req->crtc_id);
		2489	if (!crtc) {
5060	serge	2490	DRM_DEBUG_KMS("Unknown crtc ID %d\n",
		2491	plane_req->crtc_id);
		2492	return -ENOENT;
		2493	}
		2494	}
		2495
		2496	/*
		2497	* setplane_internal will take care of deref'ing either the old or new
		2498	* framebuffer depending on success.
		2499	*/
		2500	return setplane_internal(plane, crtc, fb,
		2501	plane_req->crtc_x, plane_req->crtc_y,
		2502	plane_req->crtc_w, plane_req->crtc_h,
		2503	plane_req->src_x, plane_req->src_y,
		2504	plane_req->src_w, plane_req->src_h);
		2505	}
3031	serge	2506
		2507	/**
3480	Serge	2508	* drm_mode_set_config_internal - helper to call ->set_config
		2509	* @set: modeset config to set
		2510	*
		2511	* This is a little helper to wrap internal calls to the ->set_config driver
		2512	* interface. The only thing it adds is correct refcounting dance.
5060	serge	2513	*
		2514	* Returns:
5271	serge	2515	* Zero on success, negative errno on failure.
3480	Serge	2516	*/
		2517	int drm_mode_set_config_internal(struct drm_mode_set *set)
		2518	{
		2519	struct drm_crtc *crtc = set->crtc;
4075	Serge	2520	struct drm_framebuffer *fb;
		2521	struct drm_crtc *tmp;
3480	Serge	2522	int ret;
		2523
4075	Serge	2524	/*
		2525	* NOTE: ->set_config can also disable other crtcs (if we steal all
		2526	* connectors from it), hence we need to refcount the fbs across all
		2527	* crtcs. Atomic modeset will have saner semantics ...
		2528	*/
6084	serge	2529	drm_for_each_crtc(tmp, crtc->dev)
5271	serge	2530	tmp->primary->old_fb = tmp->primary->fb;
4075	Serge	2531
3480	Serge	2532	fb = set->fb;
		2533
		2534	ret = crtc->funcs->set_config(set);
		2535	if (ret == 0) {
5060	serge	2536	crtc->primary->crtc = crtc;
		2537	crtc->primary->fb = fb;
3480	Serge	2538	}
		2539
6084	serge	2540	drm_for_each_crtc(tmp, crtc->dev) {
5060	serge	2541	if (tmp->primary->fb)
		2542	drm_framebuffer_reference(tmp->primary->fb);
4075	Serge	2543	// if (tmp->old_fb)
		2544	// drm_framebuffer_unreference(tmp->old_fb);
		2545	}
		2546
3480	Serge	2547	return ret;
		2548	}
		2549	EXPORT_SYMBOL(drm_mode_set_config_internal);
		2550
5060	serge	2551	/**
6084	serge	2552	* drm_crtc_get_hv_timing - Fetches hdisplay/vdisplay for given mode
		2553	* @mode: mode to query
		2554	* @hdisplay: hdisplay value to fill in
		2555	* @vdisplay: vdisplay value to fill in
		2556	*
		2557	* The vdisplay value will be doubled if the specified mode is a stereo mode of
		2558	* the appropriate layout.
		2559	*/
		2560	void drm_crtc_get_hv_timing(const struct drm_display_mode *mode,
		2561	int hdisplay, int vdisplay)
		2562	{
		2563	struct drm_display_mode adjusted;
		2564
		2565	drm_mode_copy(&adjusted, mode);
		2566	drm_mode_set_crtcinfo(&adjusted, CRTC_STEREO_DOUBLE_ONLY);
		2567	*hdisplay = adjusted.crtc_hdisplay;
		2568	*vdisplay = adjusted.crtc_vdisplay;
		2569	}
		2570	EXPORT_SYMBOL(drm_crtc_get_hv_timing);
		2571
		2572	/**
5060	serge	2573	* drm_crtc_check_viewport - Checks that a framebuffer is big enough for the
		2574	* CRTC viewport
		2575	* @crtc: CRTC that framebuffer will be displayed on
		2576	* @x: x panning
		2577	* @y: y panning
		2578	* @mode: mode that framebuffer will be displayed under
		2579	* @fb: framebuffer to check size of
4560	Serge	2580	*/
5060	serge	2581	int drm_crtc_check_viewport(const struct drm_crtc *crtc,
6084	serge	2582	int x, int y,
		2583	const struct drm_display_mode *mode,
		2584	const struct drm_framebuffer *fb)
4560	Serge	2585
		2586	{
		2587	int hdisplay, vdisplay;
		2588
6084	serge	2589	drm_crtc_get_hv_timing(mode, &hdisplay, &vdisplay);
4560	Serge	2590
6084	serge	2591	if (crtc->state &&
		2592	crtc->primary->state->rotation & (BIT(DRM_ROTATE_90) \|
		2593	BIT(DRM_ROTATE_270)))
4560	Serge	2594	swap(hdisplay, vdisplay);
		2595
6084	serge	2596	return check_src_coords(x << 16, y << 16,
		2597	hdisplay << 16, vdisplay << 16, fb);
4560	Serge	2598	}
5060	serge	2599	EXPORT_SYMBOL(drm_crtc_check_viewport);
4560	Serge	2600
6084	serge	2601	#if 0
3480	Serge	2602	/**
1123	serge	2603	* drm_mode_setcrtc - set CRTC configuration
3480	Serge	2604	* @dev: drm device for the ioctl
		2605	* @data: data pointer for the ioctl
		2606	* @file_priv: drm file for the ioctl call
1123	serge	2607	*
		2608	* Build a new CRTC configuration based on user request.
		2609	*
		2610	* Called by the user via ioctl.
		2611	*
5060	serge	2612	* Returns:
5271	serge	2613	* Zero on success, negative errno on failure.
1123	serge	2614	*/
		2615	int drm_mode_setcrtc(struct drm_device dev, void data,
		2616	struct drm_file *file_priv)
		2617	{
		2618	struct drm_mode_config *config = &dev->mode_config;
		2619	struct drm_mode_crtc *crtc_req = data;
3031	serge	2620	struct drm_crtc *crtc;
1123	serge	2621	struct drm_connector *connector_set = NULL, connector;
		2622	struct drm_framebuffer *fb = NULL;
		2623	struct drm_display_mode *mode = NULL;
		2624	struct drm_mode_set set;
		2625	uint32_t __user *set_connectors_ptr;
3031	serge	2626	int ret;
1123	serge	2627	int i;
		2628
1963	serge	2629	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		2630	return -EINVAL;
		2631
6084	serge	2632	/*
		2633	* Universal plane src offsets are only 16.16, prevent havoc for
		2634	* drivers using universal plane code internally.
		2635	*/
		2636	if (crtc_req->x & 0xffff0000 \|\| crtc_req->y & 0xffff0000)
3031	serge	2637	return -ERANGE;
		2638
3480	Serge	2639	drm_modeset_lock_all(dev);
5060	serge	2640	crtc = drm_crtc_find(dev, crtc_req->crtc_id);
		2641	if (!crtc) {
1179	serge	2642	DRM_DEBUG_KMS("Unknown CRTC ID %d\n", crtc_req->crtc_id);
4560	Serge	2643	ret = -ENOENT;
1123	serge	2644	goto out;
		2645	}
1963	serge	2646	DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
1123	serge	2647
		2648	if (crtc_req->mode_valid) {
		2649	/* If we have a mode we need a framebuffer. */
		2650	/* If we pass -1, set the mode with the currently bound fb */
		2651	if (crtc_req->fb_id == -1) {
5060	serge	2652	if (!crtc->primary->fb) {
3031	serge	2653	DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
		2654	ret = -EINVAL;
		2655	goto out;
		2656	}
5060	serge	2657	fb = crtc->primary->fb;
3480	Serge	2658	/* Make refcounting symmetric with the lookup path. */
		2659	drm_framebuffer_reference(fb);
1123	serge	2660	} else {
3480	Serge	2661	fb = drm_framebuffer_lookup(dev, crtc_req->fb_id);
		2662	if (!fb) {
1179	serge	2663	DRM_DEBUG_KMS("Unknown FB ID%d\n",
		2664	crtc_req->fb_id);
4560	Serge	2665	ret = -ENOENT;
1123	serge	2666	goto out;
		2667	}
		2668	}
		2669
		2670	mode = drm_mode_create(dev);
3031	serge	2671	if (!mode) {
		2672	ret = -ENOMEM;
		2673	goto out;
		2674	}
		2675
6084	serge	2676	ret = drm_mode_convert_umode(mode, &crtc_req->mode);
3031	serge	2677	if (ret) {
		2678	DRM_DEBUG_KMS("Invalid mode\n");
		2679	goto out;
		2680	}
		2681
1123	serge	2682	drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
3031	serge	2683
6084	serge	2684	/*
		2685	* Check whether the primary plane supports the fb pixel format.
		2686	* Drivers not implementing the universal planes API use a
		2687	* default formats list provided by the DRM core which doesn't
		2688	* match real hardware capabilities. Skip the check in that
		2689	* case.
		2690	*/
		2691	if (!crtc->primary->format_default) {
		2692	ret = drm_plane_check_pixel_format(crtc->primary,
		2693	fb->pixel_format);
		2694	if (ret) {
		2695	DRM_DEBUG_KMS("Invalid pixel format %s\n",
		2696	drm_get_format_name(fb->pixel_format));
		2697	goto out;
		2698	}
		2699	}
		2700
4560	Serge	2701	ret = drm_crtc_check_viewport(crtc, crtc_req->x, crtc_req->y,
		2702	mode, fb);
		2703	if (ret)
		2704	goto out;
3031	serge	2705
1123	serge	2706	}
		2707
		2708	if (crtc_req->count_connectors == 0 && mode) {
1179	serge	2709	DRM_DEBUG_KMS("Count connectors is 0 but mode set\n");
1123	serge	2710	ret = -EINVAL;
		2711	goto out;
		2712	}
		2713
1179	serge	2714	if (crtc_req->count_connectors > 0 && (!mode \|\| !fb)) {
		2715	DRM_DEBUG_KMS("Count connectors is %d but no mode or fb set\n",
1123	serge	2716	crtc_req->count_connectors);
		2717	ret = -EINVAL;
		2718	goto out;
		2719	}
		2720
		2721	if (crtc_req->count_connectors > 0) {
		2722	u32 out_id;
		2723
		2724	/* Avoid unbounded kernel memory allocation */
		2725	if (crtc_req->count_connectors > config->num_connector) {
		2726	ret = -EINVAL;
		2727	goto out;
		2728	}
		2729
6084	serge	2730	connector_set = kmalloc_array(crtc_req->count_connectors,
		2731	sizeof(struct drm_connector *),
		2732	GFP_KERNEL);
1123	serge	2733	if (!connector_set) {
		2734	ret = -ENOMEM;
		2735	goto out;
		2736	}
		2737
		2738	for (i = 0; i < crtc_req->count_connectors; i++) {
3031	serge	2739	set_connectors_ptr = (uint32_t __user *)(unsigned long)crtc_req->set_connectors_ptr;
6084	serge	2740	// if (get_user(out_id, &set_connectors_ptr[i])) {
		2741	// ret = -EFAULT;
		2742	// goto out;
		2743	// }
1123	serge	2744
5060	serge	2745	connector = drm_connector_find(dev, out_id);
		2746	if (!connector) {
1179	serge	2747	DRM_DEBUG_KMS("Connector id %d unknown\n",
		2748	out_id);
4560	Serge	2749	ret = -ENOENT;
1123	serge	2750	goto out;
		2751	}
1963	serge	2752	DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
		2753	connector->base.id,
5060	serge	2754	connector->name);
1123	serge	2755
		2756	connector_set[i] = connector;
		2757	}
		2758	}
		2759
		2760	set.crtc = crtc;
		2761	set.x = crtc_req->x;
		2762	set.y = crtc_req->y;
		2763	set.mode = mode;
		2764	set.connectors = connector_set;
		2765	set.num_connectors = crtc_req->count_connectors;
1179	serge	2766	set.fb = fb;
3480	Serge	2767	ret = drm_mode_set_config_internal(&set);
1123	serge	2768
		2769	out:
3480	Serge	2770	if (fb)
		2771	drm_framebuffer_unreference(fb);
		2772
1123	serge	2773	kfree(connector_set);
3031	serge	2774	drm_mode_destroy(dev, mode);
3480	Serge	2775	drm_modeset_unlock_all(dev);
1123	serge	2776	return ret;
		2777	}
		2778
4075	Serge	2779	static int drm_mode_cursor_common(struct drm_device *dev,
		2780	struct drm_mode_cursor2 *req,
		2781	struct drm_file *file_priv)
1123	serge	2782	{
		2783	struct drm_crtc *crtc;
		2784	int ret = 0;
		2785
1963	serge	2786	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		2787	return -EINVAL;
		2788
3031	serge	2789	if (!req->flags \|\| (~DRM_MODE_CURSOR_FLAGS & req->flags))
1123	serge	2790	return -EINVAL;
		2791
5060	serge	2792	crtc = drm_crtc_find(dev, req->crtc_id);
		2793	if (!crtc) {
1179	serge	2794	DRM_DEBUG_KMS("Unknown CRTC ID %d\n", req->crtc_id);
4560	Serge	2795	return -ENOENT;
1123	serge	2796	}
		2797
5060	serge	2798	/*
		2799	* If this crtc has a universal cursor plane, call that plane's update
		2800	* handler rather than using legacy cursor handlers.
		2801	*/
5271	serge	2802	drm_modeset_lock_crtc(crtc, crtc->cursor);
		2803	if (crtc->cursor) {
		2804	ret = drm_mode_cursor_universal(crtc, req, file_priv);
		2805	goto out;
		2806	}
5060	serge	2807
1123	serge	2808	if (req->flags & DRM_MODE_CURSOR_BO) {
4075	Serge	2809	if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) {
1123	serge	2810	ret = -ENXIO;
		2811	goto out;
		2812	}
		2813	/* Turns off the cursor if handle is 0 */
4075	Serge	2814	if (crtc->funcs->cursor_set2)
		2815	ret = crtc->funcs->cursor_set2(crtc, file_priv, req->handle,
		2816	req->width, req->height, req->hot_x, req->hot_y);
		2817	else
6084	serge	2818	ret = crtc->funcs->cursor_set(crtc, file_priv, req->handle,
		2819	req->width, req->height);
1123	serge	2820	}
		2821
		2822	if (req->flags & DRM_MODE_CURSOR_MOVE) {
		2823	if (crtc->funcs->cursor_move) {
		2824	ret = crtc->funcs->cursor_move(crtc, req->x, req->y);
		2825	} else {
		2826	ret = -EFAULT;
		2827	goto out;
		2828	}
		2829	}
		2830	out:
5271	serge	2831	drm_modeset_unlock_crtc(crtc);
3480	Serge	2832
1123	serge	2833	return ret;
4075	Serge	2834
1123	serge	2835	}
5060	serge	2836
		2837
		2838	/**
		2839	* drm_mode_cursor_ioctl - set CRTC's cursor configuration
		2840	* @dev: drm device for the ioctl
		2841	* @data: data pointer for the ioctl
		2842	* @file_priv: drm file for the ioctl call
		2843	*
		2844	* Set the cursor configuration based on user request.
		2845	*
		2846	* Called by the user via ioctl.
		2847	*
		2848	* Returns:
5271	serge	2849	* Zero on success, negative errno on failure.
5060	serge	2850	*/
4075	Serge	2851	int drm_mode_cursor_ioctl(struct drm_device *dev,
6084	serge	2852	void data, struct drm_file file_priv)
4075	Serge	2853	{
		2854	struct drm_mode_cursor *req = data;
		2855	struct drm_mode_cursor2 new_req;
		2856
		2857	memcpy(&new_req, req, sizeof(struct drm_mode_cursor));
		2858	new_req.hot_x = new_req.hot_y = 0;
		2859
		2860	return drm_mode_cursor_common(dev, &new_req, file_priv);
		2861	}
		2862
5060	serge	2863	/**
		2864	* drm_mode_cursor2_ioctl - set CRTC's cursor configuration
		2865	* @dev: drm device for the ioctl
		2866	* @data: data pointer for the ioctl
		2867	* @file_priv: drm file for the ioctl call
		2868	*
		2869	* Set the cursor configuration based on user request. This implements the 2nd
		2870	* version of the cursor ioctl, which allows userspace to additionally specify
		2871	* the hotspot of the pointer.
		2872	*
		2873	* Called by the user via ioctl.
		2874	*
		2875	* Returns:
5271	serge	2876	* Zero on success, negative errno on failure.
5060	serge	2877	*/
4075	Serge	2878	int drm_mode_cursor2_ioctl(struct drm_device *dev,
		2879	void data, struct drm_file file_priv)
		2880	{
		2881	struct drm_mode_cursor2 *req = data;
6084	serge	2882
4075	Serge	2883	return drm_mode_cursor_common(dev, req, file_priv);
		2884	}
3031	serge	2885	#endif
4560	Serge	2886
5060	serge	2887	/**
		2888	* drm_mode_legacy_fb_format - compute drm fourcc code from legacy description
		2889	* @bpp: bits per pixels
		2890	* @depth: bit depth per pixel
		2891	*
		2892	* Computes a drm fourcc pixel format code for the given @bpp/@depth values.
		2893	* Useful in fbdev emulation code, since that deals in those values.
		2894	*/
3031	serge	2895	uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth)
		2896	{
		2897	uint32_t fmt;
1123	serge	2898
3031	serge	2899	switch (bpp) {
		2900	case 8:
3480	Serge	2901	fmt = DRM_FORMAT_C8;
3031	serge	2902	break;
		2903	case 16:
		2904	if (depth == 15)
		2905	fmt = DRM_FORMAT_XRGB1555;
		2906	else
		2907	fmt = DRM_FORMAT_RGB565;
		2908	break;
		2909	case 24:
		2910	fmt = DRM_FORMAT_RGB888;
		2911	break;
		2912	case 32:
		2913	if (depth == 24)
		2914	fmt = DRM_FORMAT_XRGB8888;
		2915	else if (depth == 30)
		2916	fmt = DRM_FORMAT_XRGB2101010;
		2917	else
		2918	fmt = DRM_FORMAT_ARGB8888;
		2919	break;
		2920	default:
		2921	DRM_ERROR("bad bpp, assuming x8r8g8b8 pixel format\n");
		2922	fmt = DRM_FORMAT_XRGB8888;
		2923	break;
		2924	}
		2925
		2926	return fmt;
		2927	}
		2928	EXPORT_SYMBOL(drm_mode_legacy_fb_format);
		2929	#if 0
1123	serge	2930	/**
		2931	* drm_mode_addfb - add an FB to the graphics configuration
3480	Serge	2932	* @dev: drm device for the ioctl
		2933	* @data: data pointer for the ioctl
		2934	* @file_priv: drm file for the ioctl call
1123	serge	2935	*
5060	serge	2936	* Add a new FB to the specified CRTC, given a user request. This is the
5271	serge	2937	* original addfb ioctl which only supported RGB formats.
1123	serge	2938	*
		2939	* Called by the user via ioctl.
		2940	*
5060	serge	2941	* Returns:
5271	serge	2942	* Zero on success, negative errno on failure.
1123	serge	2943	*/
		2944	int drm_mode_addfb(struct drm_device *dev,
		2945	void data, struct drm_file file_priv)
		2946	{
3031	serge	2947	struct drm_mode_fb_cmd *or = data;
		2948	struct drm_mode_fb_cmd2 r = {};
5271	serge	2949	int ret;
1123	serge	2950
5271	serge	2951	/* convert to new format and call new ioctl */
3031	serge	2952	r.fb_id = or->fb_id;
		2953	r.width = or->width;
		2954	r.height = or->height;
		2955	r.pitches[0] = or->pitch;
		2956	r.pixel_format = drm_mode_legacy_fb_format(or->bpp, or->depth);
		2957	r.handles[0] = or->handle;
		2958
5271	serge	2959	ret = drm_mode_addfb2(dev, &r, file_priv);
		2960	if (ret)
		2961	return ret;
1963	serge	2962
5271	serge	2963	or->fb_id = r.fb_id;
3031	serge	2964
5271	serge	2965	return 0;
3031	serge	2966	}
		2967
		2968	static int format_check(const struct drm_mode_fb_cmd2 *r)
		2969	{
		2970	uint32_t format = r->pixel_format & ~DRM_FORMAT_BIG_ENDIAN;
		2971
		2972	switch (format) {
		2973	case DRM_FORMAT_C8:
		2974	case DRM_FORMAT_RGB332:
		2975	case DRM_FORMAT_BGR233:
		2976	case DRM_FORMAT_XRGB4444:
		2977	case DRM_FORMAT_XBGR4444:
		2978	case DRM_FORMAT_RGBX4444:
		2979	case DRM_FORMAT_BGRX4444:
		2980	case DRM_FORMAT_ARGB4444:
		2981	case DRM_FORMAT_ABGR4444:
		2982	case DRM_FORMAT_RGBA4444:
		2983	case DRM_FORMAT_BGRA4444:
		2984	case DRM_FORMAT_XRGB1555:
		2985	case DRM_FORMAT_XBGR1555:
		2986	case DRM_FORMAT_RGBX5551:
		2987	case DRM_FORMAT_BGRX5551:
		2988	case DRM_FORMAT_ARGB1555:
		2989	case DRM_FORMAT_ABGR1555:
		2990	case DRM_FORMAT_RGBA5551:
		2991	case DRM_FORMAT_BGRA5551:
		2992	case DRM_FORMAT_RGB565:
		2993	case DRM_FORMAT_BGR565:
		2994	case DRM_FORMAT_RGB888:
		2995	case DRM_FORMAT_BGR888:
		2996	case DRM_FORMAT_XRGB8888:
		2997	case DRM_FORMAT_XBGR8888:
		2998	case DRM_FORMAT_RGBX8888:
		2999	case DRM_FORMAT_BGRX8888:
		3000	case DRM_FORMAT_ARGB8888:
		3001	case DRM_FORMAT_ABGR8888:
		3002	case DRM_FORMAT_RGBA8888:
		3003	case DRM_FORMAT_BGRA8888:
		3004	case DRM_FORMAT_XRGB2101010:
		3005	case DRM_FORMAT_XBGR2101010:
		3006	case DRM_FORMAT_RGBX1010102:
		3007	case DRM_FORMAT_BGRX1010102:
		3008	case DRM_FORMAT_ARGB2101010:
		3009	case DRM_FORMAT_ABGR2101010:
		3010	case DRM_FORMAT_RGBA1010102:
		3011	case DRM_FORMAT_BGRA1010102:
		3012	case DRM_FORMAT_YUYV:
		3013	case DRM_FORMAT_YVYU:
		3014	case DRM_FORMAT_UYVY:
		3015	case DRM_FORMAT_VYUY:
		3016	case DRM_FORMAT_AYUV:
		3017	case DRM_FORMAT_NV12:
		3018	case DRM_FORMAT_NV21:
		3019	case DRM_FORMAT_NV16:
		3020	case DRM_FORMAT_NV61:
		3021	case DRM_FORMAT_NV24:
		3022	case DRM_FORMAT_NV42:
		3023	case DRM_FORMAT_YUV410:
		3024	case DRM_FORMAT_YVU410:
		3025	case DRM_FORMAT_YUV411:
		3026	case DRM_FORMAT_YVU411:
		3027	case DRM_FORMAT_YUV420:
		3028	case DRM_FORMAT_YVU420:
		3029	case DRM_FORMAT_YUV422:
		3030	case DRM_FORMAT_YVU422:
		3031	case DRM_FORMAT_YUV444:
		3032	case DRM_FORMAT_YVU444:
		3033	return 0;
		3034	default:
4560	Serge	3035	DRM_DEBUG_KMS("invalid pixel format %s\n",
		3036	drm_get_format_name(r->pixel_format));
3031	serge	3037	return -EINVAL;
		3038	}
		3039	}
		3040
		3041	static int framebuffer_check(const struct drm_mode_fb_cmd2 *r)
		3042	{
		3043	int ret, hsub, vsub, num_planes, i;
		3044
		3045	ret = format_check(r);
		3046	if (ret) {
4075	Serge	3047	DRM_DEBUG_KMS("bad framebuffer format %s\n",
		3048	drm_get_format_name(r->pixel_format));
3031	serge	3049	return ret;
		3050	}
		3051
		3052	hsub = drm_format_horz_chroma_subsampling(r->pixel_format);
		3053	vsub = drm_format_vert_chroma_subsampling(r->pixel_format);
		3054	num_planes = drm_format_num_planes(r->pixel_format);
		3055
		3056	if (r->width == 0 \|\| r->width % hsub) {
5271	serge	3057	DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width);
3031	serge	3058	return -EINVAL;
		3059	}
		3060
		3061	if (r->height == 0 \|\| r->height % vsub) {
		3062	DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height);
		3063	return -EINVAL;
		3064	}
		3065
		3066	for (i = 0; i < num_planes; i++) {
		3067	unsigned int width = r->width / (i != 0 ? hsub : 1);
3192	Serge	3068	unsigned int height = r->height / (i != 0 ? vsub : 1);
		3069	unsigned int cpp = drm_format_plane_cpp(r->pixel_format, i);
3031	serge	3070
		3071	if (!r->handles[i]) {
		3072	DRM_DEBUG_KMS("no buffer object handle for plane %d\n", i);
		3073	return -EINVAL;
		3074	}
		3075
3192	Serge	3076	if ((uint64_t) width * cpp > UINT_MAX)
		3077	return -ERANGE;
		3078
		3079	if ((uint64_t) height * r->pitches[i] + r->offsets[i] > UINT_MAX)
		3080	return -ERANGE;
		3081
		3082	if (r->pitches[i] < width * cpp) {
3031	serge	3083	DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[i], i);
		3084	return -EINVAL;
		3085	}
6084	serge	3086
		3087	if (r->modifier[i] && !(r->flags & DRM_MODE_FB_MODIFIERS)) {
		3088	DRM_DEBUG_KMS("bad fb modifier %llu for plane %d\n",
		3089	r->modifier[i], i);
		3090	return -EINVAL;
		3091	}
		3092
		3093	/* modifier specific checks: */
		3094	switch (r->modifier[i]) {
		3095	case DRM_FORMAT_MOD_SAMSUNG_64_32_TILE:
		3096	/* NOTE: the pitch restriction may be lifted later if it turns
		3097	* out that no hw has this restriction:
		3098	*/
		3099	if (r->pixel_format != DRM_FORMAT_NV12 \|\|
		3100	width % 128 \|\| height % 32 \|\|
		3101	r->pitches[i] % 128) {
		3102	DRM_DEBUG_KMS("bad modifier data for plane %d\n", i);
		3103	return -EINVAL;
		3104	}
		3105	break;
		3106
		3107	default:
		3108	break;
		3109	}
3031	serge	3110	}
		3111
6084	serge	3112	for (i = num_planes; i < 4; i++) {
		3113	if (r->modifier[i]) {
		3114	DRM_DEBUG_KMS("non-zero modifier for unused plane %d\n", i);
		3115	return -EINVAL;
		3116	}
		3117
		3118	/* Pre-FB_MODIFIERS userspace didn't clear the structs properly. */
		3119	if (!(r->flags & DRM_MODE_FB_MODIFIERS))
		3120	continue;
		3121
		3122	if (r->handles[i]) {
		3123	DRM_DEBUG_KMS("buffer object handle for unused plane %d\n", i);
		3124	return -EINVAL;
		3125	}
		3126
		3127	if (r->pitches[i]) {
		3128	DRM_DEBUG_KMS("non-zero pitch for unused plane %d\n", i);
		3129	return -EINVAL;
		3130	}
		3131
		3132	if (r->offsets[i]) {
		3133	DRM_DEBUG_KMS("non-zero offset for unused plane %d\n", i);
		3134	return -EINVAL;
		3135	}
		3136	}
		3137
3031	serge	3138	return 0;
		3139	}
		3140
6084	serge	3141	static struct drm_framebuffer *
		3142	internal_framebuffer_create(struct drm_device *dev,
		3143	struct drm_mode_fb_cmd2 *r,
		3144	struct drm_file *file_priv)
3031	serge	3145	{
		3146	struct drm_mode_config *config = &dev->mode_config;
		3147	struct drm_framebuffer *fb;
		3148	int ret;
		3149
6084	serge	3150	if (r->flags & ~(DRM_MODE_FB_INTERLACED \| DRM_MODE_FB_MODIFIERS)) {
3192	Serge	3151	DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags);
5060	serge	3152	return ERR_PTR(-EINVAL);
3192	Serge	3153	}
		3154
1123	serge	3155	if ((config->min_width > r->width) \|\| (r->width > config->max_width)) {
3031	serge	3156	DRM_DEBUG_KMS("bad framebuffer width %d, should be >= %d && <= %d\n",
		3157	r->width, config->min_width, config->max_width);
5060	serge	3158	return ERR_PTR(-EINVAL);
1123	serge	3159	}
		3160	if ((config->min_height > r->height) \|\| (r->height > config->max_height)) {
3031	serge	3161	DRM_DEBUG_KMS("bad framebuffer height %d, should be >= %d && <= %d\n",
		3162	r->height, config->min_height, config->max_height);
5060	serge	3163	return ERR_PTR(-EINVAL);
1123	serge	3164	}
		3165
6084	serge	3166	if (r->flags & DRM_MODE_FB_MODIFIERS &&
		3167	!dev->mode_config.allow_fb_modifiers) {
		3168	DRM_DEBUG_KMS("driver does not support fb modifiers\n");
		3169	return ERR_PTR(-EINVAL);
		3170	}
		3171
3031	serge	3172	ret = framebuffer_check(r);
		3173	if (ret)
5060	serge	3174	return ERR_PTR(ret);
3031	serge	3175
1123	serge	3176	fb = dev->mode_config.funcs->fb_create(dev, file_priv, r);
1963	serge	3177	if (IS_ERR(fb)) {
3031	serge	3178	DRM_DEBUG_KMS("could not create framebuffer\n");
5060	serge	3179	return fb;
1123	serge	3180	}
		3181
5060	serge	3182	return fb;
		3183	}
3480	Serge	3184
5060	serge	3185	/**
		3186	* drm_mode_addfb2 - add an FB to the graphics configuration
		3187	* @dev: drm device for the ioctl
		3188	* @data: data pointer for the ioctl
		3189	* @file_priv: drm file for the ioctl call
		3190	*
		3191	* Add a new FB to the specified CRTC, given a user request with format. This is
		3192	* the 2nd version of the addfb ioctl, which supports multi-planar framebuffers
		3193	* and uses fourcc codes as pixel format specifiers.
		3194	*
		3195	* Called by the user via ioctl.
		3196	*
		3197	* Returns:
5271	serge	3198	* Zero on success, negative errno on failure.
5060	serge	3199	*/
		3200	int drm_mode_addfb2(struct drm_device *dev,
		3201	void data, struct drm_file file_priv)
		3202	{
6084	serge	3203	struct drm_mode_fb_cmd2 *r = data;
5060	serge	3204	struct drm_framebuffer *fb;
		3205
		3206	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		3207	return -EINVAL;
		3208
6084	serge	3209	fb = internal_framebuffer_create(dev, r, file_priv);
5060	serge	3210	if (IS_ERR(fb))
		3211	return PTR_ERR(fb);
		3212
6084	serge	3213	/* Transfer ownership to the filp for reaping on close */
		3214
		3215	DRM_DEBUG_KMS("[FB:%d]\n", fb->base.id);
		3216	mutex_lock(&file_priv->fbs_lock);
		3217	r->fb_id = fb->base.id;
		3218	list_add(&fb->filp_head, &file_priv->fbs);
		3219	mutex_unlock(&file_priv->fbs_lock);
		3220
5060	serge	3221	return 0;
1123	serge	3222	}
		3223
		3224	/**
		3225	* drm_mode_rmfb - remove an FB from the configuration
3480	Serge	3226	* @dev: drm device for the ioctl
		3227	* @data: data pointer for the ioctl
		3228	* @file_priv: drm file for the ioctl call
1123	serge	3229	*
		3230	* Remove the FB specified by the user.
		3231	*
		3232	* Called by the user via ioctl.
		3233	*
5060	serge	3234	* Returns:
5271	serge	3235	* Zero on success, negative errno on failure.
1123	serge	3236	*/
		3237	int drm_mode_rmfb(struct drm_device *dev,
		3238	void data, struct drm_file file_priv)
		3239	{
		3240	struct drm_framebuffer *fb = NULL;
		3241	struct drm_framebuffer *fbl = NULL;
		3242	uint32_t *id = data;
		3243	int found = 0;
		3244
1963	serge	3245	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		3246	return -EINVAL;
		3247
3480	Serge	3248	mutex_lock(&file_priv->fbs_lock);
		3249	mutex_lock(&dev->mode_config.fb_lock);
		3250	fb = __drm_framebuffer_lookup(dev, *id);
		3251	if (!fb)
		3252	goto fail_lookup;
1123	serge	3253
		3254	list_for_each_entry(fbl, &file_priv->fbs, filp_head)
		3255	if (fb == fbl)
		3256	found = 1;
3480	Serge	3257	if (!found)
		3258	goto fail_lookup;
1123	serge	3259
3480	Serge	3260	list_del_init(&fb->filp_head);
		3261	mutex_unlock(&dev->mode_config.fb_lock);
		3262	mutex_unlock(&file_priv->fbs_lock);
		3263
6084	serge	3264	drm_framebuffer_unreference(fb);
1123	serge	3265
3480	Serge	3266	return 0;
		3267
		3268	fail_lookup:
		3269	mutex_unlock(&dev->mode_config.fb_lock);
		3270	mutex_unlock(&file_priv->fbs_lock);
		3271
4560	Serge	3272	return -ENOENT;
1123	serge	3273	}
		3274
		3275	/**
		3276	* drm_mode_getfb - get FB info
3480	Serge	3277	* @dev: drm device for the ioctl
		3278	* @data: data pointer for the ioctl
		3279	* @file_priv: drm file for the ioctl call
1123	serge	3280	*
		3281	* Lookup the FB given its ID and return info about it.
		3282	*
		3283	* Called by the user via ioctl.
		3284	*
5060	serge	3285	* Returns:
5271	serge	3286	* Zero on success, negative errno on failure.
1123	serge	3287	*/
		3288	int drm_mode_getfb(struct drm_device *dev,
		3289	void data, struct drm_file file_priv)
		3290	{
		3291	struct drm_mode_fb_cmd *r = data;
		3292	struct drm_framebuffer *fb;
3480	Serge	3293	int ret;
1123	serge	3294
1963	serge	3295	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		3296	return -EINVAL;
		3297
3480	Serge	3298	fb = drm_framebuffer_lookup(dev, r->fb_id);
		3299	if (!fb)
4560	Serge	3300	return -ENOENT;
1123	serge	3301
		3302	r->height = fb->height;
		3303	r->width = fb->width;
		3304	r->depth = fb->depth;
		3305	r->bpp = fb->bits_per_pixel;
3031	serge	3306	r->pitch = fb->pitches[0];
4104	Serge	3307	if (fb->funcs->create_handle) {
5271	serge	3308	if (file_priv->is_master \|\| capable(CAP_SYS_ADMIN) \|\|
		3309	drm_is_control_client(file_priv)) {
4104	Serge	3310	ret = fb->funcs->create_handle(fb, file_priv,
		3311	&r->handle);
		3312	} else {
		3313	/* GET_FB() is an unprivileged ioctl so we must not
		3314	* return a buffer-handle to non-master processes! For
		3315	* backwards-compatibility reasons, we cannot make
		3316	* GET_FB() privileged, so just return an invalid handle
		3317	* for non-masters. */
		3318	r->handle = 0;
		3319	ret = 0;
		3320	}
		3321	} else {
3480	Serge	3322	ret = -ENODEV;
4104	Serge	3323	}
1123	serge	3324
3480	Serge	3325	drm_framebuffer_unreference(fb);
		3326
1123	serge	3327	return ret;
		3328	}
		3329
5060	serge	3330	/**
		3331	* drm_mode_dirtyfb_ioctl - flush frontbuffer rendering on an FB
		3332	* @dev: drm device for the ioctl
		3333	* @data: data pointer for the ioctl
		3334	* @file_priv: drm file for the ioctl call
		3335	*
		3336	* Lookup the FB and flush out the damaged area supplied by userspace as a clip
		3337	* rectangle list. Generic userspace which does frontbuffer rendering must call
		3338	* this ioctl to flush out the changes on manual-update display outputs, e.g.
		3339	* usb display-link, mipi manual update panels or edp panel self refresh modes.
		3340	*
		3341	* Modesetting drivers which always update the frontbuffer do not need to
		3342	* implement the corresponding ->dirty framebuffer callback.
		3343	*
		3344	* Called by the user via ioctl.
		3345	*
		3346	* Returns:
5271	serge	3347	* Zero on success, negative errno on failure.
5060	serge	3348	*/
1412	serge	3349	int drm_mode_dirtyfb_ioctl(struct drm_device *dev,
		3350	void data, struct drm_file file_priv)
		3351	{
		3352	struct drm_clip_rect __user *clips_ptr;
		3353	struct drm_clip_rect *clips = NULL;
		3354	struct drm_mode_fb_dirty_cmd *r = data;
		3355	struct drm_framebuffer *fb;
		3356	unsigned flags;
		3357	int num_clips;
3031	serge	3358	int ret;
1412	serge	3359
1963	serge	3360	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		3361	return -EINVAL;
		3362
3480	Serge	3363	fb = drm_framebuffer_lookup(dev, r->fb_id);
		3364	if (!fb)
4560	Serge	3365	return -ENOENT;
1412	serge	3366
		3367	num_clips = r->num_clips;
3031	serge	3368	clips_ptr = (struct drm_clip_rect __user *)(unsigned long)r->clips_ptr;
1412	serge	3369
		3370	if (!num_clips != !clips_ptr) {
		3371	ret = -EINVAL;
		3372	goto out_err1;
		3373	}
		3374
		3375	flags = DRM_MODE_FB_DIRTY_FLAGS & r->flags;
		3376
		3377	/* If userspace annotates copy, clips must come in pairs */
		3378	if (flags & DRM_MODE_FB_DIRTY_ANNOTATE_COPY && (num_clips % 2)) {
		3379	ret = -EINVAL;
		3380	goto out_err1;
		3381	}
		3382
		3383	if (num_clips && clips_ptr) {
3031	serge	3384	if (num_clips < 0 \|\| num_clips > DRM_MODE_FB_DIRTY_MAX_CLIPS) {
		3385	ret = -EINVAL;
		3386	goto out_err1;
		3387	}
6084	serge	3388	clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
1412	serge	3389	if (!clips) {
		3390	ret = -ENOMEM;
		3391	goto out_err1;
		3392	}
		3393
		3394	ret = copy_from_user(clips, clips_ptr,
		3395	num_clips * sizeof(*clips));
1963	serge	3396	if (ret) {
		3397	ret = -EFAULT;
1412	serge	3398	goto out_err2;
6084	serge	3399	}
1412	serge	3400	}
		3401
		3402	if (fb->funcs->dirty) {
1963	serge	3403	ret = fb->funcs->dirty(fb, file_priv, flags, r->color,
		3404	clips, num_clips);
1412	serge	3405	} else {
		3406	ret = -ENOSYS;
		3407	}
		3408
		3409	out_err2:
		3410	kfree(clips);
		3411	out_err1:
3480	Serge	3412	drm_framebuffer_unreference(fb);
		3413
1412	serge	3414	return ret;
		3415	}
		3416
		3417
1123	serge	3418	/**
		3419	* drm_fb_release - remove and free the FBs on this file
3480	Serge	3420	* @priv: drm file for the ioctl
1123	serge	3421	*
		3422	* Destroy all the FBs associated with @filp.
		3423	*
		3424	* Called by the user via ioctl.
		3425	*
5060	serge	3426	* Returns:
5271	serge	3427	* Zero on success, negative errno on failure.
1123	serge	3428	*/
		3429	void drm_fb_release(struct drm_file *priv)
		3430	{
		3431	struct drm_framebuffer fb, tfb;
		3432
5271	serge	3433	/*
		3434	* When the file gets released that means no one else can access the fb
		3435	* list any more, so no need to grab fpriv->fbs_lock. And we need to
		3436	* avoid upsetting lockdep since the universal cursor code adds a
		3437	* framebuffer while holding mutex locks.
		3438	*
		3439	* Note that a real deadlock between fpriv->fbs_lock and the modeset
		3440	* locks is impossible here since no one else but this function can get
		3441	* at it any more.
		3442	*/
1123	serge	3443	list_for_each_entry_safe(fb, tfb, &priv->fbs, filp_head) {
3480	Serge	3444	list_del_init(&fb->filp_head);
		3445
6084	serge	3446	/* This drops the fpriv->fbs reference. */
		3447	drm_framebuffer_unreference(fb);
1123	serge	3448	}
		3449	}
		3450	#endif
		3451
		3452
5060	serge	3453	/**
		3454	* drm_property_create - create a new property type
		3455	* @dev: drm device
		3456	* @flags: flags specifying the property type
		3457	* @name: name of the property
		3458	* @num_values: number of pre-defined values
		3459	*
		3460	* This creates a new generic drm property which can then be attached to a drm
		3461	* object with drm_object_attach_property. The returned property object must be
		3462	* freed with drm_property_destroy.
		3463	*
5271	serge	3464	* Note that the DRM core keeps a per-device list of properties and that, if
		3465	* drm_mode_config_cleanup() is called, it will destroy all properties created
		3466	* by the driver.
		3467	*
5060	serge	3468	* Returns:
		3469	* A pointer to the newly created property on success, NULL on failure.
		3470	*/
1123	serge	3471	struct drm_property drm_property_create(struct drm_device dev, int flags,
		3472	const char *name, int num_values)
		3473	{
		3474	struct drm_property *property = NULL;
3031	serge	3475	int ret;
1123	serge	3476
		3477	property = kzalloc(sizeof(struct drm_property), GFP_KERNEL);
		3478	if (!property)
		3479	return NULL;
		3480
5060	serge	3481	property->dev = dev;
		3482
1123	serge	3483	if (num_values) {
6084	serge	3484	property->values = kcalloc(num_values, sizeof(uint64_t),
		3485	GFP_KERNEL);
1123	serge	3486	if (!property->values)
		3487	goto fail;
		3488	}
		3489
3031	serge	3490	ret = drm_mode_object_get(dev, &property->base, DRM_MODE_OBJECT_PROPERTY);
		3491	if (ret)
		3492	goto fail;
		3493
1123	serge	3494	property->flags = flags;
		3495	property->num_values = num_values;
5271	serge	3496	INIT_LIST_HEAD(&property->enum_list);
1123	serge	3497
3031	serge	3498	if (name) {
1123	serge	3499	strncpy(property->name, name, DRM_PROP_NAME_LEN);
3031	serge	3500	property->name[DRM_PROP_NAME_LEN-1] = '\0';
		3501	}
1123	serge	3502
		3503	list_add_tail(&property->head, &dev->mode_config.property_list);
5060	serge	3504
		3505	WARN_ON(!drm_property_type_valid(property));
		3506
1123	serge	3507	return property;
		3508	fail:
3031	serge	3509	kfree(property->values);
1123	serge	3510	kfree(property);
		3511	return NULL;
		3512	}
		3513	EXPORT_SYMBOL(drm_property_create);
		3514
5060	serge	3515	/**
		3516	* drm_property_create_enum - create a new enumeration property type
		3517	* @dev: drm device
		3518	* @flags: flags specifying the property type
		3519	* @name: name of the property
		3520	* @props: enumeration lists with property values
		3521	* @num_values: number of pre-defined values
		3522	*
		3523	* This creates a new generic drm property which can then be attached to a drm
		3524	* object with drm_object_attach_property. The returned property object must be
		3525	* freed with drm_property_destroy.
		3526	*
		3527	* Userspace is only allowed to set one of the predefined values for enumeration
		3528	* properties.
		3529	*
		3530	* Returns:
		3531	* A pointer to the newly created property on success, NULL on failure.
		3532	*/
3031	serge	3533	struct drm_property drm_property_create_enum(struct drm_device dev, int flags,
		3534	const char *name,
		3535	const struct drm_prop_enum_list *props,
		3536	int num_values)
		3537	{
		3538	struct drm_property *property;
		3539	int i, ret;
		3540
		3541	flags \|= DRM_MODE_PROP_ENUM;
		3542
		3543	property = drm_property_create(dev, flags, name, num_values);
		3544	if (!property)
		3545	return NULL;
		3546
		3547	for (i = 0; i < num_values; i++) {
		3548	ret = drm_property_add_enum(property, i,
		3549	props[i].type,
		3550	props[i].name);
		3551	if (ret) {
		3552	drm_property_destroy(dev, property);
		3553	return NULL;
		3554	}
		3555	}
		3556
		3557	return property;
		3558	}
		3559	EXPORT_SYMBOL(drm_property_create_enum);
		3560
5060	serge	3561	/**
		3562	* drm_property_create_bitmask - create a new bitmask property type
		3563	* @dev: drm device
		3564	* @flags: flags specifying the property type
		3565	* @name: name of the property
		3566	* @props: enumeration lists with property bitflags
5271	serge	3567	* @num_props: size of the @props array
		3568	* @supported_bits: bitmask of all supported enumeration values
5060	serge	3569	*
5271	serge	3570	* This creates a new bitmask drm property which can then be attached to a drm
5060	serge	3571	* object with drm_object_attach_property. The returned property object must be
		3572	* freed with drm_property_destroy.
		3573	*
		3574	* Compared to plain enumeration properties userspace is allowed to set any
		3575	* or'ed together combination of the predefined property bitflag values
		3576	*
		3577	* Returns:
		3578	* A pointer to the newly created property on success, NULL on failure.
		3579	*/
3031	serge	3580	struct drm_property drm_property_create_bitmask(struct drm_device dev,
		3581	int flags, const char *name,
		3582	const struct drm_prop_enum_list *props,
5060	serge	3583	int num_props,
		3584	uint64_t supported_bits)
3031	serge	3585	{
		3586	struct drm_property *property;
5060	serge	3587	int i, ret, index = 0;
		3588	int num_values = hweight64(supported_bits);
3031	serge	3589
		3590	flags \|= DRM_MODE_PROP_BITMASK;
		3591
		3592	property = drm_property_create(dev, flags, name, num_values);
		3593	if (!property)
		3594	return NULL;
5060	serge	3595	for (i = 0; i < num_props; i++) {
		3596	if (!(supported_bits & (1ULL << props[i].type)))
		3597	continue;
3031	serge	3598
5060	serge	3599	if (WARN_ON(index >= num_values)) {
		3600	drm_property_destroy(dev, property);
		3601	return NULL;
		3602	}
		3603
		3604	ret = drm_property_add_enum(property, index++,
3031	serge	3605	props[i].type,
		3606	props[i].name);
		3607	if (ret) {
		3608	drm_property_destroy(dev, property);
		3609	return NULL;
		3610	}
		3611	}
		3612
		3613	return property;
		3614	}
		3615	EXPORT_SYMBOL(drm_property_create_bitmask);
		3616
5060	serge	3617	static struct drm_property property_create_range(struct drm_device dev,
		3618	int flags, const char *name,
3031	serge	3619	uint64_t min, uint64_t max)
		3620	{
		3621	struct drm_property *property;
		3622
		3623	property = drm_property_create(dev, flags, name, 2);
		3624	if (!property)
		3625	return NULL;
		3626
		3627	property->values[0] = min;
		3628	property->values[1] = max;
		3629
		3630	return property;
		3631	}
5060	serge	3632
		3633	/**
6084	serge	3634	* drm_property_create_range - create a new unsigned ranged property type
5060	serge	3635	* @dev: drm device
		3636	* @flags: flags specifying the property type
		3637	* @name: name of the property
		3638	* @min: minimum value of the property
		3639	* @max: maximum value of the property
		3640	*
		3641	* This creates a new generic drm property which can then be attached to a drm
		3642	* object with drm_object_attach_property. The returned property object must be
		3643	* freed with drm_property_destroy.
		3644	*
6084	serge	3645	* Userspace is allowed to set any unsigned integer value in the (min, max)
		3646	* range inclusive.
5060	serge	3647	*
		3648	* Returns:
		3649	* A pointer to the newly created property on success, NULL on failure.
		3650	*/
		3651	struct drm_property drm_property_create_range(struct drm_device dev, int flags,
		3652	const char *name,
		3653	uint64_t min, uint64_t max)
		3654	{
		3655	return property_create_range(dev, DRM_MODE_PROP_RANGE \| flags,
		3656	name, min, max);
		3657	}
3031	serge	3658	EXPORT_SYMBOL(drm_property_create_range);
		3659
6084	serge	3660	/**
		3661	* drm_property_create_signed_range - create a new signed ranged property type
		3662	* @dev: drm device
		3663	* @flags: flags specifying the property type
		3664	* @name: name of the property
		3665	* @min: minimum value of the property
		3666	* @max: maximum value of the property
		3667	*
		3668	* This creates a new generic drm property which can then be attached to a drm
		3669	* object with drm_object_attach_property. The returned property object must be
		3670	* freed with drm_property_destroy.
		3671	*
		3672	* Userspace is allowed to set any signed integer value in the (min, max)
		3673	* range inclusive.
		3674	*
		3675	* Returns:
		3676	* A pointer to the newly created property on success, NULL on failure.
		3677	*/
5060	serge	3678	struct drm_property drm_property_create_signed_range(struct drm_device dev,
		3679	int flags, const char *name,
		3680	int64_t min, int64_t max)
		3681	{
		3682	return property_create_range(dev, DRM_MODE_PROP_SIGNED_RANGE \| flags,
		3683	name, I642U64(min), I642U64(max));
		3684	}
		3685	EXPORT_SYMBOL(drm_property_create_signed_range);
		3686
6084	serge	3687	/**
		3688	* drm_property_create_object - create a new object property type
		3689	* @dev: drm device
		3690	* @flags: flags specifying the property type
		3691	* @name: name of the property
		3692	* @type: object type from DRM_MODE_OBJECT_* defines
		3693	*
		3694	* This creates a new generic drm property which can then be attached to a drm
		3695	* object with drm_object_attach_property. The returned property object must be
		3696	* freed with drm_property_destroy.
		3697	*
		3698	* Userspace is only allowed to set this to any property value of the given
		3699	* @type. Only useful for atomic properties, which is enforced.
		3700	*
		3701	* Returns:
		3702	* A pointer to the newly created property on success, NULL on failure.
		3703	*/
5060	serge	3704	struct drm_property drm_property_create_object(struct drm_device dev,
		3705	int flags, const char *name, uint32_t type)
		3706	{
		3707	struct drm_property *property;
		3708
		3709	flags \|= DRM_MODE_PROP_OBJECT;
		3710
6084	serge	3711	if (WARN_ON(!(flags & DRM_MODE_PROP_ATOMIC)))
		3712	return NULL;
		3713
5060	serge	3714	property = drm_property_create(dev, flags, name, 1);
		3715	if (!property)
		3716	return NULL;
		3717
		3718	property->values[0] = type;
		3719
		3720	return property;
		3721	}
		3722	EXPORT_SYMBOL(drm_property_create_object);
		3723
		3724	/**
6084	serge	3725	* drm_property_create_bool - create a new boolean property type
		3726	* @dev: drm device
		3727	* @flags: flags specifying the property type
		3728	* @name: name of the property
		3729	*
		3730	* This creates a new generic drm property which can then be attached to a drm
		3731	* object with drm_object_attach_property. The returned property object must be
		3732	* freed with drm_property_destroy.
		3733	*
		3734	* This is implemented as a ranged property with only {0, 1} as valid values.
		3735	*
		3736	* Returns:
		3737	* A pointer to the newly created property on success, NULL on failure.
		3738	*/
		3739	struct drm_property drm_property_create_bool(struct drm_device dev, int flags,
		3740	const char *name)
		3741	{
		3742	return drm_property_create_range(dev, flags, name, 0, 1);
		3743	}
		3744	EXPORT_SYMBOL(drm_property_create_bool);
		3745
		3746	/**
5060	serge	3747	* drm_property_add_enum - add a possible value to an enumeration property
		3748	* @property: enumeration property to change
		3749	* @index: index of the new enumeration
		3750	* @value: value of the new enumeration
		3751	* @name: symbolic name of the new enumeration
		3752	*
		3753	* This functions adds enumerations to a property.
		3754	*
		3755	* It's use is deprecated, drivers should use one of the more specific helpers
		3756	* to directly create the property with all enumerations already attached.
		3757	*
		3758	* Returns:
		3759	* Zero on success, error code on failure.
		3760	*/
1123	serge	3761	int drm_property_add_enum(struct drm_property *property, int index,
		3762	uint64_t value, const char *name)
		3763	{
		3764	struct drm_property_enum *prop_enum;
		3765
5060	serge	3766	if (!(drm_property_type_is(property, DRM_MODE_PROP_ENUM) \|\|
		3767	drm_property_type_is(property, DRM_MODE_PROP_BITMASK)))
1123	serge	3768	return -EINVAL;
		3769
3031	serge	3770	/*
		3771	* Bitmask enum properties have the additional constraint of values
		3772	* from 0 to 63
		3773	*/
5060	serge	3774	if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) &&
		3775	(value > 63))
3031	serge	3776	return -EINVAL;
		3777
5271	serge	3778	if (!list_empty(&property->enum_list)) {
		3779	list_for_each_entry(prop_enum, &property->enum_list, head) {
1123	serge	3780	if (prop_enum->value == value) {
		3781	strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
		3782	prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
		3783	return 0;
		3784	}
		3785	}
		3786	}
		3787
		3788	prop_enum = kzalloc(sizeof(struct drm_property_enum), GFP_KERNEL);
		3789	if (!prop_enum)
		3790	return -ENOMEM;
		3791
		3792	strncpy(prop_enum->name, name, DRM_PROP_NAME_LEN);
		3793	prop_enum->name[DRM_PROP_NAME_LEN-1] = '\0';
		3794	prop_enum->value = value;
		3795
		3796	property->values[index] = value;
5271	serge	3797	list_add_tail(&prop_enum->head, &property->enum_list);
1123	serge	3798	return 0;
		3799	}
		3800	EXPORT_SYMBOL(drm_property_add_enum);
		3801
5060	serge	3802	/**
		3803	* drm_property_destroy - destroy a drm property
		3804	* @dev: drm device
		3805	* @property: property to destry
		3806	*
		3807	* This function frees a property including any attached resources like
		3808	* enumeration values.
		3809	*/
1123	serge	3810	void drm_property_destroy(struct drm_device dev, struct drm_property property)
		3811	{
		3812	struct drm_property_enum prop_enum, pt;
		3813
5271	serge	3814	list_for_each_entry_safe(prop_enum, pt, &property->enum_list, head) {
1123	serge	3815	list_del(&prop_enum->head);
		3816	kfree(prop_enum);
		3817	}
		3818
		3819	if (property->num_values)
		3820	kfree(property->values);
		3821	drm_mode_object_put(dev, &property->base);
		3822	list_del(&property->head);
		3823	kfree(property);
		3824	}
		3825	EXPORT_SYMBOL(drm_property_destroy);
		3826
5060	serge	3827	/**
		3828	* drm_object_attach_property - attach a property to a modeset object
		3829	* @obj: drm modeset object
		3830	* @property: property to attach
		3831	* @init_val: initial value of the property
		3832	*
		3833	* This attaches the given property to the modeset object with the given initial
		3834	* value. Currently this function cannot fail since the properties are stored in
		3835	* a statically sized array.
		3836	*/
3031	serge	3837	void drm_object_attach_property(struct drm_mode_object *obj,
		3838	struct drm_property *property,
		3839	uint64_t init_val)
		3840	{
		3841	int count = obj->properties->count;
		3842
		3843	if (count == DRM_OBJECT_MAX_PROPERTY) {
		3844	WARN(1, "Failed to attach object property (type: 0x%x). Please "
		3845	"increase DRM_OBJECT_MAX_PROPERTY by 1 for each time "
		3846	"you see this message on the same object type.\n",
		3847	obj->type);
		3848	return;
		3849	}
		3850
6084	serge	3851	obj->properties->properties[count] = property;
3031	serge	3852	obj->properties->values[count] = init_val;
		3853	obj->properties->count++;
6084	serge	3854	if (property->flags & DRM_MODE_PROP_ATOMIC)
		3855	obj->properties->atomic_count++;
3031	serge	3856	}
		3857	EXPORT_SYMBOL(drm_object_attach_property);
		3858
5060	serge	3859	/**
		3860	* drm_object_property_set_value - set the value of a property
		3861	* @obj: drm mode object to set property value for
		3862	* @property: property to set
		3863	* @val: value the property should be set to
		3864	*
		3865	* This functions sets a given property on a given object. This function only
		3866	* changes the software state of the property, it does not call into the
		3867	* driver's ->set_property callback.
		3868	*
		3869	* Returns:
		3870	* Zero on success, error code on failure.
		3871	*/
3031	serge	3872	int drm_object_property_set_value(struct drm_mode_object *obj,
		3873	struct drm_property *property, uint64_t val)
		3874	{
1123	serge	3875	int i;
		3876
3031	serge	3877	for (i = 0; i < obj->properties->count; i++) {
6084	serge	3878	if (obj->properties->properties[i] == property) {
3031	serge	3879	obj->properties->values[i] = val;
		3880	return 0;
1123	serge	3881	}
		3882	}
		3883
6084	serge	3884	return -EINVAL;
1123	serge	3885	}
3031	serge	3886	EXPORT_SYMBOL(drm_object_property_set_value);
1123	serge	3887
5060	serge	3888	/**
		3889	* drm_object_property_get_value - retrieve the value of a property
		3890	* @obj: drm mode object to get property value from
		3891	* @property: property to retrieve
		3892	* @val: storage for the property value
		3893	*
		3894	* This function retrieves the softare state of the given property for the given
		3895	* property. Since there is no driver callback to retrieve the current property
		3896	* value this might be out of sync with the hardware, depending upon the driver
		3897	* and property.
		3898	*
		3899	* Returns:
		3900	* Zero on success, error code on failure.
		3901	*/
3031	serge	3902	int drm_object_property_get_value(struct drm_mode_object *obj,
1123	serge	3903	struct drm_property property, uint64_t val)
		3904	{
		3905	int i;
		3906
6084	serge	3907	/* read-only properties bypass atomic mechanism and still store
		3908	* their value in obj->properties->values[].. mostly to avoid
		3909	* having to deal w/ EDID and similar props in atomic paths:
		3910	*/
		3911	if (drm_core_check_feature(property->dev, DRIVER_ATOMIC) &&
		3912	!(property->flags & DRM_MODE_PROP_IMMUTABLE))
		3913	return drm_atomic_get_property(obj, property, val);
		3914
3031	serge	3915	for (i = 0; i < obj->properties->count; i++) {
6084	serge	3916	if (obj->properties->properties[i] == property) {
3031	serge	3917	*val = obj->properties->values[i];
		3918	return 0;
1123	serge	3919	}
		3920	}
		3921
6084	serge	3922	return -EINVAL;
1123	serge	3923	}
3031	serge	3924	EXPORT_SYMBOL(drm_object_property_get_value);
1123	serge	3925
		3926	#if 0
5060	serge	3927	/**
5271	serge	3928	* drm_mode_getproperty_ioctl - get the property metadata
5060	serge	3929	* @dev: DRM device
		3930	* @data: ioctl data
		3931	* @file_priv: DRM file info
		3932	*
5271	serge	3933	* This function retrieves the metadata for a given property, like the different
		3934	* possible values for an enum property or the limits for a range property.
5060	serge	3935	*
5271	serge	3936	* Blob properties are special
		3937	*
5060	serge	3938	* Called by the user via ioctl.
		3939	*
		3940	* Returns:
5271	serge	3941	* Zero on success, negative errno on failure.
5060	serge	3942	*/
1123	serge	3943	int drm_mode_getproperty_ioctl(struct drm_device *dev,
		3944	void data, struct drm_file file_priv)
		3945	{
		3946	struct drm_mode_get_property *out_resp = data;
		3947	struct drm_property *property;
		3948	int enum_count = 0;
		3949	int value_count = 0;
		3950	int ret = 0, i;
		3951	int copied;
		3952	struct drm_property_enum *prop_enum;
		3953	struct drm_mode_property_enum __user *enum_ptr;
		3954	uint64_t __user *values_ptr;
		3955
1963	serge	3956	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		3957	return -EINVAL;
		3958
3480	Serge	3959	drm_modeset_lock_all(dev);
5060	serge	3960	property = drm_property_find(dev, out_resp->prop_id);
		3961	if (!property) {
4560	Serge	3962	ret = -ENOENT;
1123	serge	3963	goto done;
		3964	}
		3965
5060	serge	3966	if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) \|\|
		3967	drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
5271	serge	3968	list_for_each_entry(prop_enum, &property->enum_list, head)
1123	serge	3969	enum_count++;
		3970	}
		3971
		3972	value_count = property->num_values;
		3973
		3974	strncpy(out_resp->name, property->name, DRM_PROP_NAME_LEN);
		3975	out_resp->name[DRM_PROP_NAME_LEN-1] = 0;
		3976	out_resp->flags = property->flags;
		3977
		3978	if ((out_resp->count_values >= value_count) && value_count) {
3031	serge	3979	values_ptr = (uint64_t __user *)(unsigned long)out_resp->values_ptr;
1123	serge	3980	for (i = 0; i < value_count; i++) {
		3981	if (copy_to_user(values_ptr + i, &property->values[i], sizeof(uint64_t))) {
		3982	ret = -EFAULT;
		3983	goto done;
		3984	}
		3985	}
		3986	}
		3987	out_resp->count_values = value_count;
		3988
5060	serge	3989	if (drm_property_type_is(property, DRM_MODE_PROP_ENUM) \|\|
		3990	drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
1123	serge	3991	if ((out_resp->count_enum_blobs >= enum_count) && enum_count) {
		3992	copied = 0;
3031	serge	3993	enum_ptr = (struct drm_mode_property_enum __user *)(unsigned long)out_resp->enum_blob_ptr;
5271	serge	3994	list_for_each_entry(prop_enum, &property->enum_list, head) {
1123	serge	3995
		3996	if (copy_to_user(&enum_ptr[copied].value, &prop_enum->value, sizeof(uint64_t))) {
		3997	ret = -EFAULT;
		3998	goto done;
		3999	}
		4000
		4001	if (copy_to_user(&enum_ptr[copied].name,
		4002	&prop_enum->name, DRM_PROP_NAME_LEN)) {
		4003	ret = -EFAULT;
		4004	goto done;
		4005	}
		4006	copied++;
		4007	}
		4008	}
		4009	out_resp->count_enum_blobs = enum_count;
		4010	}
		4011
5271	serge	4012	/*
		4013	* NOTE: The idea seems to have been to use this to read all the blob
		4014	* property values. But nothing ever added them to the corresponding
		4015	* list, userspace always used the special-purpose get_blob ioctl to
		4016	* read the value for a blob property. It also doesn't make a lot of
		4017	* sense to return values here when everything else is just metadata for
		4018	* the property itself.
		4019	*/
		4020	if (drm_property_type_is(property, DRM_MODE_PROP_BLOB))
		4021	out_resp->count_enum_blobs = 0;
1123	serge	4022	done:
3480	Serge	4023	drm_modeset_unlock_all(dev);
1123	serge	4024	return ret;
		4025	}
		4026	#endif
		4027
6084	serge	4028	/**
		4029	* drm_property_create_blob - Create new blob property
		4030	*
		4031	* Creates a new blob property for a specified DRM device, optionally
		4032	* copying data.
		4033	*
		4034	* @dev: DRM device to create property for
		4035	* @length: Length to allocate for blob data
		4036	* @data: If specified, copies data into blob
		4037	*
		4038	* Returns:
		4039	* New blob property with a single reference on success, or an ERR_PTR
		4040	* value on failure.
		4041	*/
		4042	struct drm_property_blob *
5271	serge	4043	drm_property_create_blob(struct drm_device *dev, size_t length,
		4044	const void *data)
1123	serge	4045	{
		4046	struct drm_property_blob *blob;
3031	serge	4047	int ret;
1123	serge	4048
6084	serge	4049	if (!length \|\| length > ULONG_MAX - sizeof(struct drm_property_blob))
		4050	return ERR_PTR(-EINVAL);
1123	serge	4051
		4052	blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL);
		4053	if (!blob)
6084	serge	4054	return ERR_PTR(-ENOMEM);
1123	serge	4055
6084	serge	4056	/* This must be explicitly initialised, so we can safely call list_del
		4057	* on it in the removal handler, even if it isn't in a file list. */
		4058	INIT_LIST_HEAD(&blob->head_file);
		4059	blob->length = length;
		4060	blob->dev = dev;
		4061
		4062	if (data)
		4063	memcpy(blob->data, data, length);
		4064
		4065	mutex_lock(&dev->mode_config.blob_lock);
		4066
3031	serge	4067	ret = drm_mode_object_get(dev, &blob->base, DRM_MODE_OBJECT_BLOB);
		4068	if (ret) {
		4069	kfree(blob);
6084	serge	4070	mutex_unlock(&dev->mode_config.blob_lock);
		4071	return ERR_PTR(-EINVAL);
3031	serge	4072	}
		4073
6084	serge	4074	kref_init(&blob->refcount);
1123	serge	4075
6084	serge	4076	list_add_tail(&blob->head_global,
		4077	&dev->mode_config.property_blob_list);
1123	serge	4078
6084	serge	4079	mutex_unlock(&dev->mode_config.blob_lock);
		4080
1123	serge	4081	return blob;
		4082	}
6084	serge	4083	EXPORT_SYMBOL(drm_property_create_blob);
1123	serge	4084
6084	serge	4085	/**
		4086	* drm_property_free_blob - Blob property destructor
		4087	*
		4088	* Internal free function for blob properties; must not be used directly.
		4089	*
		4090	* @kref: Reference
		4091	*/
		4092	static void drm_property_free_blob(struct kref *kref)
1123	serge	4093	{
6084	serge	4094	struct drm_property_blob *blob =
		4095	container_of(kref, struct drm_property_blob, refcount);
		4096
		4097	WARN_ON(!mutex_is_locked(&blob->dev->mode_config.blob_lock));
		4098
		4099	list_del(&blob->head_global);
		4100	list_del(&blob->head_file);
		4101	drm_mode_object_put(blob->dev, &blob->base);
		4102
1123	serge	4103	kfree(blob);
		4104	}
		4105
6084	serge	4106	/**
		4107	* drm_property_unreference_blob - Unreference a blob property
		4108	*
		4109	* Drop a reference on a blob property. May free the object.
		4110	*
		4111	* @blob: Pointer to blob property
		4112	*/
		4113	void drm_property_unreference_blob(struct drm_property_blob *blob)
		4114	{
		4115	struct drm_device *dev;
		4116
		4117	if (!blob)
		4118	return;
		4119
		4120	dev = blob->dev;
		4121
		4122	DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount));
		4123
		4124	if (kref_put_mutex(&blob->refcount, drm_property_free_blob,
		4125	&dev->mode_config.blob_lock))
		4126	mutex_unlock(&dev->mode_config.blob_lock);
		4127	else
		4128	might_lock(&dev->mode_config.blob_lock);
		4129	}
		4130	EXPORT_SYMBOL(drm_property_unreference_blob);
		4131
		4132	/**
		4133	* drm_property_unreference_blob_locked - Unreference a blob property with blob_lock held
		4134	*
		4135	* Drop a reference on a blob property. May free the object. This must be
		4136	* called with blob_lock held.
		4137	*
		4138	* @blob: Pointer to blob property
		4139	*/
		4140	static void drm_property_unreference_blob_locked(struct drm_property_blob *blob)
		4141	{
		4142	if (!blob)
		4143	return;
		4144
		4145	DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount));
		4146
		4147	kref_put(&blob->refcount, drm_property_free_blob);
		4148	}
		4149
		4150	/**
		4151	* drm_property_destroy_user_blobs - destroy all blobs created by this client
		4152	* @dev: DRM device
		4153	* @file_priv: destroy all blobs owned by this file handle
		4154	*/
		4155	void drm_property_destroy_user_blobs(struct drm_device *dev,
		4156	struct drm_file *file_priv)
		4157	{
		4158	struct drm_property_blob blob, bt;
		4159
		4160	mutex_lock(&dev->mode_config.blob_lock);
		4161
		4162	list_for_each_entry_safe(blob, bt, &file_priv->blobs, head_file) {
		4163	list_del_init(&blob->head_file);
		4164	drm_property_unreference_blob_locked(blob);
		4165	}
		4166
		4167	mutex_unlock(&dev->mode_config.blob_lock);
		4168	}
		4169
		4170	/**
		4171	* drm_property_reference_blob - Take a reference on an existing property
		4172	*
		4173	* Take a new reference on an existing blob property.
		4174	*
		4175	* @blob: Pointer to blob property
		4176	*/
		4177	struct drm_property_blob drm_property_reference_blob(struct drm_property_blob blob)
		4178	{
		4179	DRM_DEBUG("%p: blob ID: %d (%d)\n", blob, blob->base.id, atomic_read(&blob->refcount.refcount));
		4180	kref_get(&blob->refcount);
		4181	return blob;
		4182	}
		4183	EXPORT_SYMBOL(drm_property_reference_blob);
		4184
		4185	/*
		4186	* Like drm_property_lookup_blob, but does not return an additional reference.
		4187	* Must be called with blob_lock held.
		4188	*/
		4189	static struct drm_property_blob __drm_property_lookup_blob(struct drm_device dev,
		4190	uint32_t id)
		4191	{
		4192	struct drm_mode_object *obj = NULL;
		4193	struct drm_property_blob *blob;
		4194
		4195	WARN_ON(!mutex_is_locked(&dev->mode_config.blob_lock));
		4196
		4197	mutex_lock(&dev->mode_config.idr_mutex);
		4198	obj = idr_find(&dev->mode_config.crtc_idr, id);
		4199	if (!obj \|\| (obj->type != DRM_MODE_OBJECT_BLOB) \|\| (obj->id != id))
		4200	blob = NULL;
		4201	else
		4202	blob = obj_to_blob(obj);
		4203	mutex_unlock(&dev->mode_config.idr_mutex);
		4204
		4205	return blob;
		4206	}
		4207
		4208	/**
		4209	* drm_property_lookup_blob - look up a blob property and take a reference
		4210	* @dev: drm device
		4211	* @id: id of the blob property
		4212	*
		4213	* If successful, this takes an additional reference to the blob property.
		4214	* callers need to make sure to eventually unreference the returned property
		4215	* again, using @drm_property_unreference_blob.
		4216	*/
		4217	struct drm_property_blob drm_property_lookup_blob(struct drm_device dev,
		4218	uint32_t id)
		4219	{
		4220	struct drm_property_blob *blob;
		4221
		4222	mutex_lock(&dev->mode_config.blob_lock);
		4223	blob = __drm_property_lookup_blob(dev, id);
		4224	if (blob) {
		4225	if (!kref_get_unless_zero(&blob->refcount))
		4226	blob = NULL;
		4227	}
		4228	mutex_unlock(&dev->mode_config.blob_lock);
		4229
		4230	return blob;
		4231	}
		4232	EXPORT_SYMBOL(drm_property_lookup_blob);
		4233
		4234	/**
		4235	* drm_property_replace_global_blob - atomically replace existing blob property
		4236	* @dev: drm device
		4237	* @replace: location of blob property pointer to be replaced
		4238	* @length: length of data for new blob, or 0 for no data
		4239	* @data: content for new blob, or NULL for no data
		4240	* @obj_holds_id: optional object for property holding blob ID
		4241	* @prop_holds_id: optional property holding blob ID
		4242	* @return 0 on success or error on failure
		4243	*
		4244	* This function will atomically replace a global property in the blob list,
		4245	* optionally updating a property which holds the ID of that property. It is
		4246	* guaranteed to be atomic: no caller will be allowed to see intermediate
		4247	* results, and either the entire operation will succeed and clean up the
		4248	* previous property, or it will fail and the state will be unchanged.
		4249	*
		4250	* If length is 0 or data is NULL, no new blob will be created, and the holding
		4251	* property, if specified, will be set to 0.
		4252	*
		4253	* Access to the replace pointer is assumed to be protected by the caller, e.g.
		4254	* by holding the relevant modesetting object lock for its parent.
		4255	*
		4256	* For example, a drm_connector has a 'PATH' property, which contains the ID
		4257	* of a blob property with the value of the MST path information. Calling this
		4258	* function with replace pointing to the connector's path_blob_ptr, length and
		4259	* data set for the new path information, obj_holds_id set to the connector's
		4260	* base object, and prop_holds_id set to the path property name, will perform
		4261	* a completely atomic update. The access to path_blob_ptr is protected by the
		4262	* caller holding a lock on the connector.
		4263	*/
		4264	static int drm_property_replace_global_blob(struct drm_device *dev,
		4265	struct drm_property_blob **replace,
		4266	size_t length,
		4267	const void *data,
		4268	struct drm_mode_object *obj_holds_id,
		4269	struct drm_property *prop_holds_id)
		4270	{
		4271	struct drm_property_blob *new_blob = NULL;
		4272	struct drm_property_blob *old_blob = NULL;
		4273	int ret;
		4274
		4275	WARN_ON(replace == NULL);
		4276
		4277	old_blob = *replace;
		4278
		4279	if (length && data) {
		4280	new_blob = drm_property_create_blob(dev, length, data);
		4281	if (IS_ERR(new_blob))
		4282	return PTR_ERR(new_blob);
		4283	}
		4284
		4285	/* This does not need to be synchronised with blob_lock, as the
		4286	* get_properties ioctl locks all modesetting objects, and
		4287	* obj_holds_id must be locked before calling here, so we cannot
		4288	* have its value out of sync with the list membership modified
		4289	* below under blob_lock. */
		4290	if (obj_holds_id) {
		4291	ret = drm_object_property_set_value(obj_holds_id,
		4292	prop_holds_id,
		4293	new_blob ?
		4294	new_blob->base.id : 0);
		4295	if (ret != 0)
		4296	goto err_created;
		4297	}
		4298
		4299	drm_property_unreference_blob(old_blob);
		4300	*replace = new_blob;
		4301
		4302	return 0;
		4303
		4304	err_created:
		4305	drm_property_unreference_blob(new_blob);
		4306	return ret;
		4307	}
		4308
		4309
1123	serge	4310	#if 0
5060	serge	4311	/**
		4312	* drm_mode_getblob_ioctl - get the contents of a blob property value
		4313	* @dev: DRM device
		4314	* @data: ioctl data
		4315	* @file_priv: DRM file info
		4316	*
		4317	* This function retrieves the contents of a blob property. The value stored in
		4318	* an object's blob property is just a normal modeset object id.
		4319	*
		4320	* Called by the user via ioctl.
		4321	*
		4322	* Returns:
5271	serge	4323	* Zero on success, negative errno on failure.
5060	serge	4324	*/
1123	serge	4325	int drm_mode_getblob_ioctl(struct drm_device *dev,
		4326	void data, struct drm_file file_priv)
		4327	{
		4328	struct drm_mode_get_blob *out_resp = data;
		4329	struct drm_property_blob *blob;
		4330	int ret = 0;
3031	serge	4331	void __user *blob_ptr;
1123	serge	4332
1963	serge	4333	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		4334	return -EINVAL;
		4335
3480	Serge	4336	drm_modeset_lock_all(dev);
6084	serge	4337	mutex_lock(&dev->mode_config.blob_lock);
		4338	blob = __drm_property_lookup_blob(dev, out_resp->blob_id);
5060	serge	4339	if (!blob) {
4560	Serge	4340	ret = -ENOENT;
1123	serge	4341	goto done;
		4342	}
		4343
		4344	if (out_resp->length == blob->length) {
3031	serge	4345	blob_ptr = (void __user *)(unsigned long)out_resp->data;
6084	serge	4346	if (copy_to_user(blob_ptr, blob->data, blob->length)) {
1123	serge	4347	ret = -EFAULT;
		4348	goto done;
		4349	}
		4350	}
		4351	out_resp->length = blob->length;
		4352
		4353	done:
6084	serge	4354	mutex_unlock(&dev->mode_config.blob_lock);
3480	Serge	4355	drm_modeset_unlock_all(dev);
1123	serge	4356	return ret;
		4357	}
		4358	#endif
		4359
5271	serge	4360	/**
		4361	* drm_mode_connector_set_path_property - set tile property on connector
		4362	* @connector: connector to set property on.
6084	serge	4363	* @path: path to use for property; must not be NULL.
5271	serge	4364	*
		4365	* This creates a property to expose to userspace to specify a
		4366	* connector path. This is mainly used for DisplayPort MST where
		4367	* connectors have a topology and we want to allow userspace to give
		4368	* them more meaningful names.
		4369	*
		4370	* Returns:
		4371	* Zero on success, negative errno on failure.
		4372	*/
5060	serge	4373	int drm_mode_connector_set_path_property(struct drm_connector *connector,
5271	serge	4374	const char *path)
5060	serge	4375	{
		4376	struct drm_device *dev = connector->dev;
5271	serge	4377	int ret;
5060	serge	4378
6084	serge	4379	ret = drm_property_replace_global_blob(dev,
		4380	&connector->path_blob_ptr,
		4381	strlen(path) + 1,
		4382	path,
		4383	&connector->base,
		4384	dev->mode_config.path_property);
5060	serge	4385	return ret;
		4386	}
		4387	EXPORT_SYMBOL(drm_mode_connector_set_path_property);
		4388
		4389	/**
5271	serge	4390	* drm_mode_connector_set_tile_property - set tile property on connector
		4391	* @connector: connector to set property on.
		4392	*
		4393	* This looks up the tile information for a connector, and creates a
		4394	* property for userspace to parse if it exists. The property is of
		4395	* the form of 8 integers using ':' as a separator.
		4396	*
		4397	* Returns:
		4398	* Zero on success, errno on failure.
		4399	*/
		4400	int drm_mode_connector_set_tile_property(struct drm_connector *connector)
		4401	{
		4402	struct drm_device *dev = connector->dev;
		4403	char tile[256];
6084	serge	4404	int ret;
5271	serge	4405
		4406	if (!connector->has_tile) {
6084	serge	4407	ret = drm_property_replace_global_blob(dev,
		4408	&connector->tile_blob_ptr,
		4409	0,
		4410	NULL,
		4411	&connector->base,
		4412	dev->mode_config.tile_property);
5271	serge	4413	return ret;
		4414	}
		4415
		4416	snprintf(tile, 256, "%d:%d:%d:%d:%d:%d:%d:%d",
		4417	connector->tile_group->id, connector->tile_is_single_monitor,
		4418	connector->num_h_tile, connector->num_v_tile,
		4419	connector->tile_h_loc, connector->tile_v_loc,
		4420	connector->tile_h_size, connector->tile_v_size);
		4421
6084	serge	4422	ret = drm_property_replace_global_blob(dev,
		4423	&connector->tile_blob_ptr,
		4424	strlen(tile) + 1,
		4425	tile,
		4426	&connector->base,
		4427	dev->mode_config.tile_property);
5271	serge	4428	return ret;
		4429	}
		4430	EXPORT_SYMBOL(drm_mode_connector_set_tile_property);
		4431
		4432	/**
5060	serge	4433	* drm_mode_connector_update_edid_property - update the edid property of a connector
		4434	* @connector: drm connector
		4435	* @edid: new value of the edid property
		4436	*
		4437	* This function creates a new blob modeset object and assigns its id to the
		4438	* connector's edid property.
		4439	*
		4440	* Returns:
5367	serge	4441	* Zero on success, negative errno on failure.
5060	serge	4442	*/
1123	serge	4443	int drm_mode_connector_update_edid_property(struct drm_connector *connector,
5271	serge	4444	const struct edid *edid)
1123	serge	4445	{
		4446	struct drm_device *dev = connector->dev;
6084	serge	4447	size_t size = 0;
5271	serge	4448	int ret;
1123	serge	4449
5060	serge	4450	/* ignore requests to set edid when overridden */
		4451	if (connector->override_edid)
		4452	return 0;
		4453
6084	serge	4454	if (edid)
		4455	size = EDID_LENGTH * (1 + edid->extensions);
1123	serge	4456
6084	serge	4457	ret = drm_property_replace_global_blob(dev,
		4458	&connector->edid_blob_ptr,
		4459	size,
		4460	edid,
		4461	&connector->base,
		4462	dev->mode_config.edid_property);
		4463	return ret;
		4464	}
		4465	EXPORT_SYMBOL(drm_mode_connector_update_edid_property);
		4466
		4467	/* Some properties could refer to dynamic refcnt'd objects, or things that
		4468	* need special locking to handle lifetime issues (ie. to ensure the prop
		4469	* value doesn't become invalid part way through the property update due to
		4470	* race). The value returned by reference via 'obj' should be passed back
		4471	* to drm_property_change_valid_put() after the property is set (and the
		4472	* object to which the property is attached has a chance to take it's own
		4473	* reference).
		4474	*/
		4475	bool drm_property_change_valid_get(struct drm_property *property,
		4476	uint64_t value, struct drm_mode_object **ref)
		4477	{
		4478	int i;
		4479
		4480	if (property->flags & DRM_MODE_PROP_IMMUTABLE)
		4481	return false;
		4482
		4483	*ref = NULL;
		4484
		4485	if (drm_property_type_is(property, DRM_MODE_PROP_RANGE)) {
		4486	if (value < property->values[0] \|\| value > property->values[1])
		4487	return false;
		4488	return true;
		4489	} else if (drm_property_type_is(property, DRM_MODE_PROP_SIGNED_RANGE)) {
		4490	int64_t svalue = U642I64(value);
		4491
		4492	if (svalue < U642I64(property->values[0]) \|\|
		4493	svalue > U642I64(property->values[1]))
		4494	return false;
		4495	return true;
		4496	} else if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK)) {
		4497	uint64_t valid_mask = 0;
		4498
		4499	for (i = 0; i < property->num_values; i++)
		4500	valid_mask \|= (1ULL << property->values[i]);
		4501	return !(value & ~valid_mask);
		4502	} else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB)) {
		4503	struct drm_property_blob *blob;
		4504
		4505	if (value == 0)
		4506	return true;
		4507
		4508	blob = drm_property_lookup_blob(property->dev, value);
		4509	if (blob) {
		4510	*ref = &blob->base;
		4511	return true;
		4512	} else {
		4513	return false;
		4514	}
		4515	} else if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
		4516	/* a zero value for an object property translates to null: */
		4517	if (value == 0)
		4518	return true;
		4519
		4520	/* handle refcnt'd objects specially: */
		4521	if (property->values[0] == DRM_MODE_OBJECT_FB) {
		4522	struct drm_framebuffer *fb;
		4523	fb = drm_framebuffer_lookup(property->dev, value);
		4524	if (fb) {
		4525	*ref = &fb->base;
		4526	return true;
		4527	} else {
		4528	return false;
		4529	}
		4530	} else {
		4531	return _object_find(property->dev, value, property->values[0]) != NULL;
		4532	}
1123	serge	4533	}
		4534
6084	serge	4535	for (i = 0; i < property->num_values; i++)
		4536	if (property->values[i] == value)
		4537	return true;
		4538	return false;
		4539	}
1123	serge	4540
6084	serge	4541	void drm_property_change_valid_put(struct drm_property *property,
		4542	struct drm_mode_object *ref)
		4543	{
		4544	if (!ref)
		4545	return;
1123	serge	4546
6084	serge	4547	if (drm_property_type_is(property, DRM_MODE_PROP_OBJECT)) {
		4548	if (property->values[0] == DRM_MODE_OBJECT_FB)
		4549	drm_framebuffer_unreference(obj_to_fb(ref));
		4550	} else if (drm_property_type_is(property, DRM_MODE_PROP_BLOB))
		4551	drm_property_unreference_blob(obj_to_blob(ref));
1123	serge	4552	}
		4553
3031	serge	4554
5271	serge	4555
3031	serge	4556	static int drm_mode_connector_set_obj_prop(struct drm_mode_object *obj,
		4557	struct drm_property *property,
		4558	uint64_t value)
1123	serge	4559	{
3031	serge	4560	int ret = -EINVAL;
		4561	struct drm_connector *connector = obj_to_connector(obj);
		4562
		4563	/* Do DPMS ourselves */
		4564	if (property == connector->dev->mode_config.dpms_property) {
6084	serge	4565	ret = 0;
3031	serge	4566	if (connector->funcs->dpms)
6084	serge	4567	ret = (*connector->funcs->dpms)(connector, (int)value);
3031	serge	4568	} else if (connector->funcs->set_property)
		4569	ret = connector->funcs->set_property(connector, property, value);
		4570
		4571	/* store the property value if successful */
		4572	if (!ret)
3192	Serge	4573	drm_object_property_set_value(&connector->base, property, value);
3031	serge	4574	return ret;
		4575	}
		4576
		4577	static int drm_mode_crtc_set_obj_prop(struct drm_mode_object *obj,
		4578	struct drm_property *property,
		4579	uint64_t value)
		4580	{
		4581	int ret = -EINVAL;
		4582	struct drm_crtc *crtc = obj_to_crtc(obj);
		4583
		4584	if (crtc->funcs->set_property)
		4585	ret = crtc->funcs->set_property(crtc, property, value);
		4586	if (!ret)
		4587	drm_object_property_set_value(obj, property, value);
		4588
		4589	return ret;
		4590	}
		4591
5271	serge	4592	/**
		4593	* drm_mode_plane_set_obj_prop - set the value of a property
		4594	* @plane: drm plane object to set property value for
		4595	* @property: property to set
		4596	* @value: value the property should be set to
		4597	*
		4598	* This functions sets a given property on a given plane object. This function
		4599	* calls the driver's ->set_property callback and changes the software state of
		4600	* the property if the callback succeeds.
		4601	*
		4602	* Returns:
		4603	* Zero on success, error code on failure.
		4604	*/
		4605	int drm_mode_plane_set_obj_prop(struct drm_plane *plane,
6084	serge	4606	struct drm_property *property,
		4607	uint64_t value)
3031	serge	4608	{
		4609	int ret = -EINVAL;
5271	serge	4610	struct drm_mode_object *obj = &plane->base;
3031	serge	4611
		4612	if (plane->funcs->set_property)
		4613	ret = plane->funcs->set_property(plane, property, value);
		4614	if (!ret)
		4615	drm_object_property_set_value(obj, property, value);
		4616
		4617	return ret;
		4618	}
5271	serge	4619	EXPORT_SYMBOL(drm_mode_plane_set_obj_prop);
3031	serge	4620
5271	serge	4621	#if 0
5060	serge	4622	/**
5271	serge	4623	* drm_mode_obj_get_properties_ioctl - get the current value of a object's property
5060	serge	4624	* @dev: DRM device
		4625	* @data: ioctl data
		4626	* @file_priv: DRM file info
		4627	*
		4628	* This function retrieves the current value for an object's property. Compared
		4629	* to the connector specific ioctl this one is extended to also work on crtc and
		4630	* plane objects.
		4631	*
		4632	* Called by the user via ioctl.
		4633	*
		4634	* Returns:
5271	serge	4635	* Zero on success, negative errno on failure.
5060	serge	4636	*/
3031	serge	4637	int drm_mode_obj_get_properties_ioctl(struct drm_device dev, void data,
		4638	struct drm_file *file_priv)
		4639	{
		4640	struct drm_mode_obj_get_properties *arg = data;
1123	serge	4641	struct drm_mode_object *obj;
3031	serge	4642	int ret = 0;
1123	serge	4643
1963	serge	4644	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		4645	return -EINVAL;
		4646
3480	Serge	4647	drm_modeset_lock_all(dev);
1123	serge	4648
3031	serge	4649	obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
1123	serge	4650	if (!obj) {
4560	Serge	4651	ret = -ENOENT;
1123	serge	4652	goto out;
		4653	}
3031	serge	4654	if (!obj->properties) {
		4655	ret = -EINVAL;
		4656	goto out;
		4657	}
1123	serge	4658
6084	serge	4659	ret = get_properties(obj, file_priv->atomic,
		4660	(uint32_t __user *)(unsigned long)(arg->props_ptr),
		4661	(uint64_t __user *)(unsigned long)(arg->prop_values_ptr),
		4662	&arg->count_props);
3031	serge	4663
		4664	out:
3480	Serge	4665	drm_modeset_unlock_all(dev);
3031	serge	4666	return ret;
		4667	}
1123	serge	4668
5060	serge	4669	/**
		4670	* drm_mode_obj_set_property_ioctl - set the current value of an object's property
		4671	* @dev: DRM device
		4672	* @data: ioctl data
		4673	* @file_priv: DRM file info
		4674	*
		4675	* This function sets the current value for an object's property. It also calls
		4676	* into a driver's ->set_property callback to update the hardware state.
		4677	* Compared to the connector specific ioctl this one is extended to also work on
		4678	* crtc and plane objects.
		4679	*
		4680	* Called by the user via ioctl.
		4681	*
		4682	* Returns:
5271	serge	4683	* Zero on success, negative errno on failure.
5060	serge	4684	*/
3031	serge	4685	int drm_mode_obj_set_property_ioctl(struct drm_device dev, void data,
		4686	struct drm_file *file_priv)
		4687	{
		4688	struct drm_mode_obj_set_property *arg = data;
		4689	struct drm_mode_object *arg_obj;
		4690	struct drm_mode_object *prop_obj;
		4691	struct drm_property *property;
6084	serge	4692	int i, ret = -EINVAL;
		4693	struct drm_mode_object *ref;
3031	serge	4694
		4695	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		4696	return -EINVAL;
		4697
3480	Serge	4698	drm_modeset_lock_all(dev);
3031	serge	4699
		4700	arg_obj = drm_mode_object_find(dev, arg->obj_id, arg->obj_type);
4560	Serge	4701	if (!arg_obj) {
		4702	ret = -ENOENT;
1123	serge	4703	goto out;
4560	Serge	4704	}
3031	serge	4705	if (!arg_obj->properties)
		4706	goto out;
1123	serge	4707
3031	serge	4708	for (i = 0; i < arg_obj->properties->count; i++)
6084	serge	4709	if (arg_obj->properties->properties[i]->base.id == arg->prop_id)
3031	serge	4710	break;
		4711
		4712	if (i == arg_obj->properties->count)
1123	serge	4713	goto out;
		4714
3031	serge	4715	prop_obj = drm_mode_object_find(dev, arg->prop_id,
		4716	DRM_MODE_OBJECT_PROPERTY);
4560	Serge	4717	if (!prop_obj) {
		4718	ret = -ENOENT;
6084	serge	4719	goto out;
4560	Serge	4720	}
3031	serge	4721	property = obj_to_property(prop_obj);
1123	serge	4722
6084	serge	4723	if (!drm_property_change_valid_get(property, arg->value, &ref))
		4724	goto out;
3031	serge	4725
		4726	switch (arg_obj->type) {
		4727	case DRM_MODE_OBJECT_CONNECTOR:
		4728	ret = drm_mode_connector_set_obj_prop(arg_obj, property,
		4729	arg->value);
		4730	break;
		4731	case DRM_MODE_OBJECT_CRTC:
		4732	ret = drm_mode_crtc_set_obj_prop(arg_obj, property, arg->value);
		4733	break;
		4734	case DRM_MODE_OBJECT_PLANE:
5271	serge	4735	ret = drm_mode_plane_set_obj_prop(obj_to_plane(arg_obj),
		4736	property, arg->value);
6084	serge	4737	break;
		4738	}
1123	serge	4739
6084	serge	4740	drm_property_change_valid_put(property, ref);
		4741
1123	serge	4742	out:
3480	Serge	4743	drm_modeset_unlock_all(dev);
1123	serge	4744	return ret;
		4745	}
		4746	#endif
		4747
5060	serge	4748	/**
		4749	* drm_mode_connector_attach_encoder - attach a connector to an encoder
		4750	* @connector: connector to attach
		4751	* @encoder: encoder to attach @connector to
		4752	*
		4753	* This function links up a connector to an encoder. Note that the routing
		4754	* restrictions between encoders and crtcs are exposed to userspace through the
		4755	* possible_clones and possible_crtcs bitmasks.
		4756	*
		4757	* Returns:
5271	serge	4758	* Zero on success, negative errno on failure.
5060	serge	4759	*/
1123	serge	4760	int drm_mode_connector_attach_encoder(struct drm_connector *connector,
		4761	struct drm_encoder *encoder)
		4762	{
		4763	int i;
		4764
		4765	for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
		4766	if (connector->encoder_ids[i] == 0) {
		4767	connector->encoder_ids[i] = encoder->base.id;
		4768	return 0;
		4769	}
		4770	}
		4771	return -ENOMEM;
		4772	}
		4773	EXPORT_SYMBOL(drm_mode_connector_attach_encoder);
		4774
5060	serge	4775	/**
		4776	* drm_mode_crtc_set_gamma_size - set the gamma table size
		4777	* @crtc: CRTC to set the gamma table size for
		4778	* @gamma_size: size of the gamma table
		4779	*
		4780	* Drivers which support gamma tables should set this to the supported gamma
		4781	* table size when initializing the CRTC. Currently the drm core only supports a
		4782	* fixed gamma table size.
		4783	*
		4784	* Returns:
5271	serge	4785	* Zero on success, negative errno on failure.
5060	serge	4786	*/
3031	serge	4787	int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc,
6084	serge	4788	int gamma_size)
1123	serge	4789	{
		4790	crtc->gamma_size = gamma_size;
		4791
6084	serge	4792	crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3,
		4793	GFP_KERNEL);
1123	serge	4794	if (!crtc->gamma_store) {
		4795	crtc->gamma_size = 0;
3031	serge	4796	return -ENOMEM;
1123	serge	4797	}
		4798
3031	serge	4799	return 0;
1123	serge	4800	}
		4801	EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size);
		4802
		4803	#if 0
5060	serge	4804	/**
		4805	* drm_mode_gamma_set_ioctl - set the gamma table
		4806	* @dev: DRM device
		4807	* @data: ioctl data
		4808	* @file_priv: DRM file info
		4809	*
		4810	* Set the gamma table of a CRTC to the one passed in by the user. Userspace can
		4811	* inquire the required gamma table size through drm_mode_gamma_get_ioctl.
		4812	*
		4813	* Called by the user via ioctl.
		4814	*
		4815	* Returns:
5271	serge	4816	* Zero on success, negative errno on failure.
5060	serge	4817	*/
1123	serge	4818	int drm_mode_gamma_set_ioctl(struct drm_device *dev,
		4819	void data, struct drm_file file_priv)
		4820	{
		4821	struct drm_mode_crtc_lut *crtc_lut = data;
		4822	struct drm_crtc *crtc;
		4823	void r_base, g_base, *b_base;
		4824	int size;
		4825	int ret = 0;
		4826
1963	serge	4827	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		4828	return -EINVAL;
		4829
3480	Serge	4830	drm_modeset_lock_all(dev);
5060	serge	4831	crtc = drm_crtc_find(dev, crtc_lut->crtc_id);
		4832	if (!crtc) {
4560	Serge	4833	ret = -ENOENT;
1123	serge	4834	goto out;
		4835	}
		4836
3031	serge	4837	if (crtc->funcs->gamma_set == NULL) {
		4838	ret = -ENOSYS;
		4839	goto out;
		4840	}
		4841
1123	serge	4842	/* memcpy into gamma store */
		4843	if (crtc_lut->gamma_size != crtc->gamma_size) {
		4844	ret = -EINVAL;
		4845	goto out;
		4846	}
		4847
		4848	size = crtc_lut->gamma_size * (sizeof(uint16_t));
		4849	r_base = crtc->gamma_store;
		4850	if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) {
		4851	ret = -EFAULT;
		4852	goto out;
		4853	}
		4854
		4855	g_base = r_base + size;
		4856	if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) {
		4857	ret = -EFAULT;
		4858	goto out;
		4859	}
		4860
		4861	b_base = g_base + size;
		4862	if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) {
		4863	ret = -EFAULT;
		4864	goto out;
		4865	}
		4866
1963	serge	4867	crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
1123	serge	4868
		4869	out:
3480	Serge	4870	drm_modeset_unlock_all(dev);
1123	serge	4871	return ret;
		4872
		4873	}
		4874
5060	serge	4875	/**
		4876	* drm_mode_gamma_get_ioctl - get the gamma table
		4877	* @dev: DRM device
		4878	* @data: ioctl data
		4879	* @file_priv: DRM file info
		4880	*
		4881	* Copy the current gamma table into the storage provided. This also provides
		4882	* the gamma table size the driver expects, which can be used to size the
		4883	* allocated storage.
		4884	*
		4885	* Called by the user via ioctl.
		4886	*
		4887	* Returns:
5271	serge	4888	* Zero on success, negative errno on failure.
5060	serge	4889	*/
1123	serge	4890	int drm_mode_gamma_get_ioctl(struct drm_device *dev,
		4891	void data, struct drm_file file_priv)
		4892	{
		4893	struct drm_mode_crtc_lut *crtc_lut = data;
		4894	struct drm_crtc *crtc;
		4895	void r_base, g_base, *b_base;
		4896	int size;
		4897	int ret = 0;
		4898
1963	serge	4899	if (!drm_core_check_feature(dev, DRIVER_MODESET))
		4900	return -EINVAL;
		4901
3480	Serge	4902	drm_modeset_lock_all(dev);
5060	serge	4903	crtc = drm_crtc_find(dev, crtc_lut->crtc_id);
		4904	if (!crtc) {
4560	Serge	4905	ret = -ENOENT;
1123	serge	4906	goto out;
		4907	}
		4908
		4909	/* memcpy into gamma store */
		4910	if (crtc_lut->gamma_size != crtc->gamma_size) {
		4911	ret = -EINVAL;
		4912	goto out;
		4913	}
		4914
		4915	size = crtc_lut->gamma_size * (sizeof(uint16_t));
		4916	r_base = crtc->gamma_store;
		4917	if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) {
		4918	ret = -EFAULT;
		4919	goto out;
		4920	}
		4921
		4922	g_base = r_base + size;
		4923	if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) {
		4924	ret = -EFAULT;
		4925	goto out;
		4926	}
		4927
		4928	b_base = g_base + size;
		4929	if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) {
		4930	ret = -EFAULT;
		4931	goto out;
		4932	}
		4933	out:
3480	Serge	4934	drm_modeset_unlock_all(dev);
1123	serge	4935	return ret;
		4936	}
		4937
		4938	#endif
1179	serge	4939
		4940
5060	serge	4941	/**
		4942	* drm_mode_config_reset - call ->reset callbacks
		4943	* @dev: drm device
		4944	*
		4945	* This functions calls all the crtc's, encoder's and connector's ->reset
		4946	* callback. Drivers can use this in e.g. their driver load or resume code to
		4947	* reset hardware and software state.
		4948	*/
1963	serge	4949	void drm_mode_config_reset(struct drm_device *dev)
		4950	{
		4951	struct drm_crtc *crtc;
5271	serge	4952	struct drm_plane *plane;
1963	serge	4953	struct drm_encoder *encoder;
		4954	struct drm_connector *connector;
		4955
6084	serge	4956	drm_for_each_plane(plane, dev)
5271	serge	4957	if (plane->funcs->reset)
		4958	plane->funcs->reset(plane);
		4959
6084	serge	4960	drm_for_each_crtc(crtc, dev)
1963	serge	4961	if (crtc->funcs->reset)
		4962	crtc->funcs->reset(crtc);
		4963
6084	serge	4964	drm_for_each_encoder(encoder, dev)
1963	serge	4965	if (encoder->funcs->reset)
		4966	encoder->funcs->reset(encoder);
		4967
6084	serge	4968	mutex_lock(&dev->mode_config.mutex);
		4969	drm_for_each_connector(connector, dev)
1963	serge	4970	if (connector->funcs->reset)
		4971	connector->funcs->reset(connector);
6084	serge	4972	mutex_unlock(&dev->mode_config.mutex);
1963	serge	4973	}
		4974	EXPORT_SYMBOL(drm_mode_config_reset);
3031	serge	4975	/*
		4976	* Just need to support RGB formats here for compat with code that doesn't
		4977	* use pixel formats directly yet.
		4978	*/
		4979	void drm_fb_get_bpp_depth(uint32_t format, unsigned int *depth,
		4980	int *bpp)
		4981	{
		4982	switch (format) {
3480	Serge	4983	case DRM_FORMAT_C8:
3031	serge	4984	case DRM_FORMAT_RGB332:
		4985	case DRM_FORMAT_BGR233:
		4986	*depth = 8;
		4987	*bpp = 8;
		4988	break;
		4989	case DRM_FORMAT_XRGB1555:
		4990	case DRM_FORMAT_XBGR1555:
		4991	case DRM_FORMAT_RGBX5551:
		4992	case DRM_FORMAT_BGRX5551:
		4993	case DRM_FORMAT_ARGB1555:
		4994	case DRM_FORMAT_ABGR1555:
		4995	case DRM_FORMAT_RGBA5551:
		4996	case DRM_FORMAT_BGRA5551:
		4997	*depth = 15;
		4998	*bpp = 16;
		4999	break;
		5000	case DRM_FORMAT_RGB565:
		5001	case DRM_FORMAT_BGR565:
		5002	*depth = 16;
		5003	*bpp = 16;
		5004	break;
		5005	case DRM_FORMAT_RGB888:
		5006	case DRM_FORMAT_BGR888:
		5007	*depth = 24;
		5008	*bpp = 24;
		5009	break;
		5010	case DRM_FORMAT_XRGB8888:
		5011	case DRM_FORMAT_XBGR8888:
		5012	case DRM_FORMAT_RGBX8888:
		5013	case DRM_FORMAT_BGRX8888:
		5014	*depth = 24;
		5015	*bpp = 32;
		5016	break;
		5017	case DRM_FORMAT_XRGB2101010:
		5018	case DRM_FORMAT_XBGR2101010:
		5019	case DRM_FORMAT_RGBX1010102:
		5020	case DRM_FORMAT_BGRX1010102:
		5021	case DRM_FORMAT_ARGB2101010:
		5022	case DRM_FORMAT_ABGR2101010:
		5023	case DRM_FORMAT_RGBA1010102:
		5024	case DRM_FORMAT_BGRA1010102:
		5025	*depth = 30;
		5026	*bpp = 32;
		5027	break;
		5028	case DRM_FORMAT_ARGB8888:
		5029	case DRM_FORMAT_ABGR8888:
		5030	case DRM_FORMAT_RGBA8888:
		5031	case DRM_FORMAT_BGRA8888:
		5032	*depth = 32;
		5033	*bpp = 32;
		5034	break;
		5035	default:
4560	Serge	5036	DRM_DEBUG_KMS("unsupported pixel format %s\n",
		5037	drm_get_format_name(format));
3031	serge	5038	*depth = 0;
		5039	*bpp = 0;
		5040	break;
		5041	}
		5042	}
		5043	EXPORT_SYMBOL(drm_fb_get_bpp_depth);
		5044
		5045	/**
		5046	* drm_format_num_planes - get the number of planes for format
		5047	* @format: pixel format (DRM_FORMAT_*)
		5048	*
5060	serge	5049	* Returns:
3031	serge	5050	* The number of planes used by the specified pixel format.
		5051	*/
		5052	int drm_format_num_planes(uint32_t format)
		5053	{
		5054	switch (format) {
		5055	case DRM_FORMAT_YUV410:
		5056	case DRM_FORMAT_YVU410:
		5057	case DRM_FORMAT_YUV411:
		5058	case DRM_FORMAT_YVU411:
		5059	case DRM_FORMAT_YUV420:
		5060	case DRM_FORMAT_YVU420:
		5061	case DRM_FORMAT_YUV422:
		5062	case DRM_FORMAT_YVU422:
		5063	case DRM_FORMAT_YUV444:
		5064	case DRM_FORMAT_YVU444:
		5065	return 3;
		5066	case DRM_FORMAT_NV12:
		5067	case DRM_FORMAT_NV21:
		5068	case DRM_FORMAT_NV16:
		5069	case DRM_FORMAT_NV61:
		5070	case DRM_FORMAT_NV24:
		5071	case DRM_FORMAT_NV42:
		5072	return 2;
		5073	default:
		5074	return 1;
		5075	}
		5076	}
		5077	EXPORT_SYMBOL(drm_format_num_planes);
		5078
		5079	/**
		5080	* drm_format_plane_cpp - determine the bytes per pixel value
		5081	* @format: pixel format (DRM_FORMAT_*)
		5082	* @plane: plane index
		5083	*
5060	serge	5084	* Returns:
3031	serge	5085	* The bytes per pixel value for the specified plane.
		5086	*/
		5087	int drm_format_plane_cpp(uint32_t format, int plane)
		5088	{
		5089	unsigned int depth;
		5090	int bpp;
		5091
		5092	if (plane >= drm_format_num_planes(format))
		5093	return 0;
		5094
		5095	switch (format) {
		5096	case DRM_FORMAT_YUYV:
		5097	case DRM_FORMAT_YVYU:
		5098	case DRM_FORMAT_UYVY:
		5099	case DRM_FORMAT_VYUY:
		5100	return 2;
		5101	case DRM_FORMAT_NV12:
		5102	case DRM_FORMAT_NV21:
		5103	case DRM_FORMAT_NV16:
		5104	case DRM_FORMAT_NV61:
		5105	case DRM_FORMAT_NV24:
		5106	case DRM_FORMAT_NV42:
		5107	return plane ? 2 : 1;
		5108	case DRM_FORMAT_YUV410:
		5109	case DRM_FORMAT_YVU410:
		5110	case DRM_FORMAT_YUV411:
		5111	case DRM_FORMAT_YVU411:
		5112	case DRM_FORMAT_YUV420:
		5113	case DRM_FORMAT_YVU420:
		5114	case DRM_FORMAT_YUV422:
		5115	case DRM_FORMAT_YVU422:
		5116	case DRM_FORMAT_YUV444:
		5117	case DRM_FORMAT_YVU444:
		5118	return 1;
		5119	default:
		5120	drm_fb_get_bpp_depth(format, &depth, &bpp);
		5121	return bpp >> 3;
		5122	}
		5123	}
		5124	EXPORT_SYMBOL(drm_format_plane_cpp);
		5125
		5126	/**
		5127	* drm_format_horz_chroma_subsampling - get the horizontal chroma subsampling factor
		5128	* @format: pixel format (DRM_FORMAT_*)
		5129	*
5060	serge	5130	* Returns:
3031	serge	5131	* The horizontal chroma subsampling factor for the
		5132	* specified pixel format.
		5133	*/
		5134	int drm_format_horz_chroma_subsampling(uint32_t format)
		5135	{
		5136	switch (format) {
		5137	case DRM_FORMAT_YUV411:
		5138	case DRM_FORMAT_YVU411:
		5139	case DRM_FORMAT_YUV410:
		5140	case DRM_FORMAT_YVU410:
		5141	return 4;
		5142	case DRM_FORMAT_YUYV:
		5143	case DRM_FORMAT_YVYU:
		5144	case DRM_FORMAT_UYVY:
		5145	case DRM_FORMAT_VYUY:
		5146	case DRM_FORMAT_NV12:
		5147	case DRM_FORMAT_NV21:
		5148	case DRM_FORMAT_NV16:
		5149	case DRM_FORMAT_NV61:
		5150	case DRM_FORMAT_YUV422:
		5151	case DRM_FORMAT_YVU422:
		5152	case DRM_FORMAT_YUV420:
		5153	case DRM_FORMAT_YVU420:
		5154	return 2;
		5155	default:
		5156	return 1;
		5157	}
		5158	}
		5159	EXPORT_SYMBOL(drm_format_horz_chroma_subsampling);
		5160
		5161	/**
		5162	* drm_format_vert_chroma_subsampling - get the vertical chroma subsampling factor
		5163	* @format: pixel format (DRM_FORMAT_*)
		5164	*
5060	serge	5165	* Returns:
3031	serge	5166	* The vertical chroma subsampling factor for the
		5167	* specified pixel format.
		5168	*/
		5169	int drm_format_vert_chroma_subsampling(uint32_t format)
		5170	{
		5171	switch (format) {
		5172	case DRM_FORMAT_YUV410:
		5173	case DRM_FORMAT_YVU410:
		5174	return 4;
		5175	case DRM_FORMAT_YUV420:
		5176	case DRM_FORMAT_YVU420:
		5177	case DRM_FORMAT_NV12:
		5178	case DRM_FORMAT_NV21:
		5179	return 2;
		5180	default:
		5181	return 1;
		5182	}
		5183	}
		5184	EXPORT_SYMBOL(drm_format_vert_chroma_subsampling);
3746	Serge	5185
		5186	/**
5271	serge	5187	* drm_rotation_simplify() - Try to simplify the rotation
		5188	* @rotation: Rotation to be simplified
		5189	* @supported_rotations: Supported rotations
		5190	*
		5191	* Attempt to simplify the rotation to a form that is supported.
		5192	* Eg. if the hardware supports everything except DRM_REFLECT_X
		5193	* one could call this function like this:
		5194	*
		5195	* drm_rotation_simplify(rotation, BIT(DRM_ROTATE_0) \|
		5196	* BIT(DRM_ROTATE_90) \| BIT(DRM_ROTATE_180) \|
		5197	* BIT(DRM_ROTATE_270) \| BIT(DRM_REFLECT_Y));
		5198	*
		5199	* to eliminate the DRM_ROTATE_X flag. Depending on what kind of
		5200	* transforms the hardware supports, this function may not
		5201	* be able to produce a supported transform, so the caller should
		5202	* check the result afterwards.
		5203	*/
		5204	unsigned int drm_rotation_simplify(unsigned int rotation,
		5205	unsigned int supported_rotations)
		5206	{
		5207	if (rotation & ~supported_rotations) {
		5208	rotation ^= BIT(DRM_REFLECT_X) \| BIT(DRM_REFLECT_Y);
6084	serge	5209	rotation = (rotation & DRM_REFLECT_MASK) \|
		5210	BIT((ffs(rotation & DRM_ROTATE_MASK) + 1) % 4);
5271	serge	5211	}
		5212
		5213	return rotation;
		5214	}
		5215	EXPORT_SYMBOL(drm_rotation_simplify);
		5216
		5217	/**
3746	Serge	5218	* drm_mode_config_init - initialize DRM mode_configuration structure
		5219	* @dev: DRM device
		5220	*
		5221	* Initialize @dev's mode_config structure, used for tracking the graphics
		5222	* configuration of @dev.
		5223	*
		5224	* Since this initializes the modeset locks, no locking is possible. Which is no
		5225	* problem, since this should happen single threaded at init time. It is the
		5226	* driver's problem to ensure this guarantee.
		5227	*
		5228	*/
		5229	void drm_mode_config_init(struct drm_device *dev)
		5230	{
		5231	mutex_init(&dev->mode_config.mutex);
5060	serge	5232	drm_modeset_lock_init(&dev->mode_config.connection_mutex);
3746	Serge	5233	mutex_init(&dev->mode_config.idr_mutex);
		5234	mutex_init(&dev->mode_config.fb_lock);
6084	serge	5235	mutex_init(&dev->mode_config.blob_lock);
3746	Serge	5236	INIT_LIST_HEAD(&dev->mode_config.fb_list);
		5237	INIT_LIST_HEAD(&dev->mode_config.crtc_list);
		5238	INIT_LIST_HEAD(&dev->mode_config.connector_list);
		5239	INIT_LIST_HEAD(&dev->mode_config.encoder_list);
		5240	INIT_LIST_HEAD(&dev->mode_config.property_list);
		5241	INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
		5242	INIT_LIST_HEAD(&dev->mode_config.plane_list);
		5243	idr_init(&dev->mode_config.crtc_idr);
5271	serge	5244	idr_init(&dev->mode_config.tile_idr);
3746	Serge	5245
		5246	drm_modeset_lock_all(dev);
6084	serge	5247	drm_mode_create_standard_properties(dev);
3746	Serge	5248	drm_modeset_unlock_all(dev);
		5249
		5250	/* Just to be sure */
		5251	dev->mode_config.num_fb = 0;
		5252	dev->mode_config.num_connector = 0;
		5253	dev->mode_config.num_crtc = 0;
		5254	dev->mode_config.num_encoder = 0;
5060	serge	5255	dev->mode_config.num_overlay_plane = 0;
		5256	dev->mode_config.num_total_plane = 0;
3746	Serge	5257	}
		5258	EXPORT_SYMBOL(drm_mode_config_init);
		5259
5060	serge	5260	/**
		5261	* drm_mode_config_cleanup - free up DRM mode_config info
		5262	* @dev: DRM device
		5263	*
		5264	* Free up all the connectors and CRTCs associated with this DRM device, then
		5265	* free up the framebuffers and associated buffer objects.
		5266	*
		5267	* Note that since this /should/ happen single-threaded at driver/device
		5268	* teardown time, no locking is required. It's the driver's job to ensure that
		5269	* this guarantee actually holds true.
		5270	*
		5271	* FIXME: cleanup any dangling user buffer objects too
		5272	*/
5271	serge	5273	void drm_mode_config_cleanup(struct drm_device *dev)
		5274	{
		5275	struct drm_connector connector, ot;
		5276	struct drm_crtc crtc, ct;
		5277	struct drm_encoder encoder, enct;
		5278	struct drm_framebuffer fb, fbt;
		5279	struct drm_property property, pt;
		5280	struct drm_property_blob blob, bt;
		5281	struct drm_plane plane, plt;
		5282
		5283	list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
		5284	head) {
		5285	encoder->funcs->destroy(encoder);
		5286	}
		5287
		5288	list_for_each_entry_safe(connector, ot,
		5289	&dev->mode_config.connector_list, head) {
		5290	connector->funcs->destroy(connector);
		5291	}
		5292
		5293	list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
		5294	head) {
		5295	drm_property_destroy(dev, property);
		5296	}
		5297
		5298	list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
6084	serge	5299	head_global) {
		5300	drm_property_unreference_blob(blob);
5271	serge	5301	}
		5302
		5303	/*
		5304	* Single-threaded teardown context, so it's not required to grab the
		5305	* fb_lock to protect against concurrent fb_list access. Contrary, it
		5306	* would actually deadlock with the drm_framebuffer_cleanup function.
		5307	*
		5308	* Also, if there are any framebuffers left, that's a driver leak now,
		5309	* so politely WARN about this.
		5310	*/
		5311	WARN_ON(!list_empty(&dev->mode_config.fb_list));
		5312	list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
6084	serge	5313	drm_framebuffer_free(&fb->refcount);
5271	serge	5314	}
		5315
		5316	list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
		5317	head) {
		5318	plane->funcs->destroy(plane);
		5319	}
		5320
		5321	list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
		5322	crtc->funcs->destroy(crtc);
		5323	}
		5324
		5325	idr_destroy(&dev->mode_config.tile_idr);
		5326	idr_destroy(&dev->mode_config.crtc_idr);
		5327	drm_modeset_lock_fini(&dev->mode_config.connection_mutex);
		5328	}
		5329	EXPORT_SYMBOL(drm_mode_config_cleanup);
		5330
		5331	struct drm_property drm_mode_create_rotation_property(struct drm_device dev,
		5332	unsigned int supported_rotations)
		5333	{
		5334	static const struct drm_prop_enum_list props[] = {
		5335	{ DRM_ROTATE_0, "rotate-0" },
		5336	{ DRM_ROTATE_90, "rotate-90" },
		5337	{ DRM_ROTATE_180, "rotate-180" },
		5338	{ DRM_ROTATE_270, "rotate-270" },
		5339	{ DRM_REFLECT_X, "reflect-x" },
		5340	{ DRM_REFLECT_Y, "reflect-y" },
		5341	};
		5342
		5343	return drm_property_create_bitmask(dev, 0, "rotation",
		5344	props, ARRAY_SIZE(props),
		5345	supported_rotations);
		5346	}
		5347	EXPORT_SYMBOL(drm_mode_create_rotation_property);
		5348
		5349	/**
		5350	* DOC: Tile group
		5351	*
		5352	* Tile groups are used to represent tiled monitors with a unique
		5353	* integer identifier. Tiled monitors using DisplayID v1.3 have
		5354	* a unique 8-byte handle, we store this in a tile group, so we
		5355	* have a common identifier for all tiles in a monitor group.
		5356	*/
		5357	static void drm_tile_group_free(struct kref *kref)
		5358	{
		5359	struct drm_tile_group *tg = container_of(kref, struct drm_tile_group, refcount);
		5360	struct drm_device *dev = tg->dev;
		5361	mutex_lock(&dev->mode_config.idr_mutex);
		5362	idr_remove(&dev->mode_config.tile_idr, tg->id);
		5363	mutex_unlock(&dev->mode_config.idr_mutex);
		5364	kfree(tg);
		5365	}
		5366
		5367	/**
		5368	* drm_mode_put_tile_group - drop a reference to a tile group.
		5369	* @dev: DRM device
		5370	* @tg: tile group to drop reference to.
		5371	*
		5372	* drop reference to tile group and free if 0.
		5373	*/
		5374	void drm_mode_put_tile_group(struct drm_device *dev,
		5375	struct drm_tile_group *tg)
		5376	{
		5377	kref_put(&tg->refcount, drm_tile_group_free);
		5378	}
		5379
		5380	/**
		5381	* drm_mode_get_tile_group - get a reference to an existing tile group
		5382	* @dev: DRM device
		5383	* @topology: 8-bytes unique per monitor.
		5384	*
		5385	* Use the unique bytes to get a reference to an existing tile group.
		5386	*
		5387	* RETURNS:
		5388	* tile group or NULL if not found.
		5389	*/
		5390	struct drm_tile_group drm_mode_get_tile_group(struct drm_device dev,
		5391	char topology[8])
		5392	{
		5393	struct drm_tile_group *tg;
		5394	int id;
		5395	mutex_lock(&dev->mode_config.idr_mutex);
		5396	idr_for_each_entry(&dev->mode_config.tile_idr, tg, id) {
		5397	if (!memcmp(tg->group_data, topology, 8)) {
6084	serge	5398	if (!kref_get_unless_zero(&tg->refcount))
		5399	tg = NULL;
5271	serge	5400	mutex_unlock(&dev->mode_config.idr_mutex);
		5401	return tg;
		5402	}
		5403	}
		5404	mutex_unlock(&dev->mode_config.idr_mutex);
		5405	return NULL;
		5406	}
6084	serge	5407	EXPORT_SYMBOL(drm_mode_get_tile_group);
5271	serge	5408
		5409	/**
		5410	* drm_mode_create_tile_group - create a tile group from a displayid description
		5411	* @dev: DRM device
		5412	* @topology: 8-bytes unique per monitor.
		5413	*
		5414	* Create a tile group for the unique monitor, and get a unique
		5415	* identifier for the tile group.
		5416	*
		5417	* RETURNS:
		5418	* new tile group or error.
		5419	*/
		5420	struct drm_tile_group drm_mode_create_tile_group(struct drm_device dev,
		5421	char topology[8])
		5422	{
		5423	struct drm_tile_group *tg;
		5424	int ret;
		5425
		5426	tg = kzalloc(sizeof(*tg), GFP_KERNEL);
		5427	if (!tg)
		5428	return ERR_PTR(-ENOMEM);
		5429
		5430	kref_init(&tg->refcount);
		5431	memcpy(tg->group_data, topology, 8);
		5432	tg->dev = dev;
		5433
		5434	mutex_lock(&dev->mode_config.idr_mutex);
		5435	ret = idr_alloc(&dev->mode_config.tile_idr, tg, 1, 0, GFP_KERNEL);
		5436	if (ret >= 0) {
		5437	tg->id = ret;
		5438	} else {
		5439	kfree(tg);
		5440	tg = ERR_PTR(ret);
		5441	}
		5442
		5443	mutex_unlock(&dev->mode_config.idr_mutex);
		5444	return tg;
		5445	}
6084	serge	5446	EXPORT_SYMBOL(drm_mode_create_tile_group);

Subversion Repositories Kolibri OS

(root)/drivers/video/drm/drm_crtc.c – Rev 6084