WebSVN – Kolibri OS – Blame – /drivers/video/drm/i915/intel_bios.c

Rev	Author	Line No.	Line
2351	Serge	1	/*
		2	* Copyright © 2006 Intel Corporation
		3	*
		4	* Permission is hereby granted, free of charge, to any person obtaining a
		5	* copy of this software and associated documentation files (the "Software"),
		6	* to deal in the Software without restriction, including without limitation
		7	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
		8	* and/or sell copies of the Software, and to permit persons to whom the
		9	* Software is furnished to do so, subject to the following conditions:
		10	*
		11	* The above copyright notice and this permission notice (including the next
		12	* paragraph) shall be included in all copies or substantial portions of the
		13	* Software.
		14	*
		15	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
		16	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
		17	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
		18	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
		19	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
		20	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
		21	* SOFTWARE.
		22	*
		23	* Authors:
		24	* Eric Anholt
		25	*
		26	*/
6937	serge	27
5097	serge	28	#include
5060	serge	29	#include
3031	serge	30	#include
2351	Serge	31	#include "i915_drv.h"
		32	#include "intel_bios.h"
		33
		34	#define SLAVE_ADDR1 0x70
		35	#define SLAVE_ADDR2 0x72
		36
		37	static int panel_type;
		38
6084	serge	39	static const void *
		40	find_section(const void *_bdb, int section_id)
2351	Serge	41	{
6084	serge	42	const struct bdb_header *bdb = _bdb;
		43	const u8 *base = _bdb;
2351	Serge	44	int index = 0;
6084	serge	45	u32 total, current_size;
2351	Serge	46	u8 current_id;
		47
		48	/* skip to first section */
		49	index += bdb->header_size;
		50	total = bdb->bdb_size;
		51
		52	/* walk the sections looking for section_id */
5060	serge	53	while (index + 3 < total) {
2351	Serge	54	current_id = *(base + index);
		55	index++;
5060	serge	56
6084	serge	57	current_size = ((const u16 )(base + index));
2351	Serge	58	index += 2;
5060	serge	59
6084	serge	60	/* The MIPI Sequence Block v3+ has a separate size field. */
		61	if (current_id == BDB_MIPI_SEQUENCE && *(base + index) >= 3)
		62	current_size = ((const u32 )(base + index + 1));
		63
5060	serge	64	if (index + current_size > total)
		65	return NULL;
		66
2351	Serge	67	if (current_id == section_id)
		68	return base + index;
5060	serge	69
2351	Serge	70	index += current_size;
		71	}
		72
		73	return NULL;
		74	}
		75
		76	static u16
6084	serge	77	get_blocksize(const void *p)
2351	Serge	78	{
		79	u16 *block_ptr, block_size;
		80
		81	block_ptr = (u16 )((char )p - 2);
		82	block_size = *block_ptr;
		83	return block_size;
		84	}
		85
		86	static void
		87	fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
		88	const struct lvds_dvo_timing *dvo_timing)
		89	{
		90	panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) \|
		91	dvo_timing->hactive_lo;
		92	panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
		93	((dvo_timing->hsync_off_hi << 8) \| dvo_timing->hsync_off_lo);
		94	panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
		95	dvo_timing->hsync_pulse_width;
		96	panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
		97	((dvo_timing->hblank_hi << 8) \| dvo_timing->hblank_lo);
		98
		99	panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) \|
		100	dvo_timing->vactive_lo;
		101	panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
		102	dvo_timing->vsync_off;
		103	panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
		104	dvo_timing->vsync_pulse_width;
		105	panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
		106	((dvo_timing->vblank_hi << 8) \| dvo_timing->vblank_lo);
		107	panel_fixed_mode->clock = dvo_timing->clock * 10;
		108	panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
		109
		110	if (dvo_timing->hsync_positive)
		111	panel_fixed_mode->flags \|= DRM_MODE_FLAG_PHSYNC;
		112	else
		113	panel_fixed_mode->flags \|= DRM_MODE_FLAG_NHSYNC;
		114
		115	if (dvo_timing->vsync_positive)
		116	panel_fixed_mode->flags \|= DRM_MODE_FLAG_PVSYNC;
		117	else
		118	panel_fixed_mode->flags \|= DRM_MODE_FLAG_NVSYNC;
		119
		120	/* Some VBTs have bogus h/vtotal values */
		121	if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
		122	panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
		123	if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
		124	panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
		125
		126	drm_mode_set_name(panel_fixed_mode);
		127	}
		128
		129	static const struct lvds_dvo_timing *
		130	get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
		131	const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs,
		132	int index)
		133	{
		134	/*
		135	* the size of fp_timing varies on the different platform.
		136	* So calculate the DVO timing relative offset in LVDS data
		137	* entry to get the DVO timing entry
		138	*/
		139
		140	int lfp_data_size =
		141	lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
		142	lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
		143	int dvo_timing_offset =
		144	lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
		145	lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
		146	char entry = (char )lvds_lfp_data->data + lfp_data_size * index;
		147
		148	return (struct lvds_dvo_timing *)(entry + dvo_timing_offset);
		149	}
		150
3031	serge	151	/* get lvds_fp_timing entry
		152	* this function may return NULL if the corresponding entry is invalid
		153	*/
		154	static const struct lvds_fp_timing *
		155	get_lvds_fp_timing(const struct bdb_header *bdb,
		156	const struct bdb_lvds_lfp_data *data,
		157	const struct bdb_lvds_lfp_data_ptrs *ptrs,
		158	int index)
		159	{
		160	size_t data_ofs = (const u8 )data - (const u8 )bdb;
		161	u16 data_size = ((const u16 )data)[-1]; / stored in header */
		162	size_t ofs;
		163
		164	if (index >= ARRAY_SIZE(ptrs->ptr))
		165	return NULL;
		166	ofs = ptrs->ptr[index].fp_timing_offset;
		167	if (ofs < data_ofs \|\|
		168	ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size)
		169	return NULL;
		170	return (const struct lvds_fp_timing )((const u8 )bdb + ofs);
		171	}
		172
2351	Serge	173	/* Try to find integrated panel data */
		174	static void
		175	parse_lfp_panel_data(struct drm_i915_private *dev_priv,
6084	serge	176	const struct bdb_header *bdb)
2351	Serge	177	{
		178	const struct bdb_lvds_options *lvds_options;
		179	const struct bdb_lvds_lfp_data *lvds_lfp_data;
		180	const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
		181	const struct lvds_dvo_timing *panel_dvo_timing;
3031	serge	182	const struct lvds_fp_timing *fp_timing;
2351	Serge	183	struct drm_display_mode *panel_fixed_mode;
6084	serge	184	int drrs_mode;
2351	Serge	185
		186	lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
		187	if (!lvds_options)
		188	return;
		189
4104	Serge	190	dev_priv->vbt.lvds_dither = lvds_options->pixel_dither;
2351	Serge	191	if (lvds_options->panel_type == 0xff)
		192	return;
		193
		194	panel_type = lvds_options->panel_type;
		195
5060	serge	196	drrs_mode = (lvds_options->dps_panel_type_bits
		197	>> (panel_type * 2)) & MODE_MASK;
		198	/*
		199	* VBT has static DRRS = 0 and seamless DRRS = 2.
		200	* The below piece of code is required to adjust vbt.drrs_type
		201	* to match the enum drrs_support_type.
		202	*/
		203	switch (drrs_mode) {
		204	case 0:
		205	dev_priv->vbt.drrs_type = STATIC_DRRS_SUPPORT;
		206	DRM_DEBUG_KMS("DRRS supported mode is static\n");
		207	break;
		208	case 2:
		209	dev_priv->vbt.drrs_type = SEAMLESS_DRRS_SUPPORT;
		210	DRM_DEBUG_KMS("DRRS supported mode is seamless\n");
		211	break;
		212	default:
		213	dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
		214	DRM_DEBUG_KMS("DRRS not supported (VBT input)\n");
		215	break;
		216	}
		217
2351	Serge	218	lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
		219	if (!lvds_lfp_data)
		220	return;
		221
		222	lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
		223	if (!lvds_lfp_data_ptrs)
		224	return;
		225
4104	Serge	226	dev_priv->vbt.lvds_vbt = 1;
2351	Serge	227
		228	panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
		229	lvds_lfp_data_ptrs,
		230	lvds_options->panel_type);
		231
		232	panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
		233	if (!panel_fixed_mode)
		234	return;
		235
		236	fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);
		237
4104	Serge	238	dev_priv->vbt.lfp_lvds_vbt_mode = panel_fixed_mode;
2351	Serge	239
		240	DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
		241	drm_mode_debug_printmodeline(panel_fixed_mode);
		242
3031	serge	243	fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data,
		244	lvds_lfp_data_ptrs,
		245	lvds_options->panel_type);
		246	if (fp_timing) {
		247	/* check the resolution, just to be sure */
		248	if (fp_timing->x_res == panel_fixed_mode->hdisplay &&
		249	fp_timing->y_res == panel_fixed_mode->vdisplay) {
4104	Serge	250	dev_priv->vbt.bios_lvds_val = fp_timing->lvds_reg_val;
3031	serge	251	DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
4104	Serge	252	dev_priv->vbt.bios_lvds_val);
3031	serge	253	}
		254	}
2351	Serge	255	}
		256
4560	Serge	257	static void
6084	serge	258	parse_lfp_backlight(struct drm_i915_private *dev_priv,
		259	const struct bdb_header *bdb)
4560	Serge	260	{
		261	const struct bdb_lfp_backlight_data *backlight_data;
		262	const struct bdb_lfp_backlight_data_entry *entry;
		263
		264	backlight_data = find_section(bdb, BDB_LVDS_BACKLIGHT);
		265	if (!backlight_data)
		266	return;
		267
		268	if (backlight_data->entry_size != sizeof(backlight_data->data[0])) {
		269	DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n",
		270	backlight_data->entry_size);
		271	return;
		272	}
		273
		274	entry = &backlight_data->data[panel_type];
		275
5060	serge	276	dev_priv->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM;
		277	if (!dev_priv->vbt.backlight.present) {
		278	DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n",
		279	entry->type);
		280	return;
		281	}
		282
4560	Serge	283	dev_priv->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz;
		284	dev_priv->vbt.backlight.active_low_pwm = entry->active_low_pwm;
5060	serge	285	dev_priv->vbt.backlight.min_brightness = entry->min_brightness;
4560	Serge	286	DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, "
		287	"active %s, min brightness %u, level %u\n",
		288	dev_priv->vbt.backlight.pwm_freq_hz,
		289	dev_priv->vbt.backlight.active_low_pwm ? "low" : "high",
5060	serge	290	dev_priv->vbt.backlight.min_brightness,
4560	Serge	291	backlight_data->level[panel_type]);
		292	}
		293
2351	Serge	294	/* Try to find sdvo panel data */
		295	static void
		296	parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
6084	serge	297	const struct bdb_header *bdb)
2351	Serge	298	{
6084	serge	299	const struct lvds_dvo_timing *dvo_timing;
2351	Serge	300	struct drm_display_mode *panel_fixed_mode;
		301	int index;
		302
5060	serge	303	index = i915.vbt_sdvo_panel_type;
3031	serge	304	if (index == -2) {
		305	DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
		306	return;
		307	}
		308
2351	Serge	309	if (index == -1) {
6084	serge	310	const struct bdb_sdvo_lvds_options *sdvo_lvds_options;
2351	Serge	311
		312	sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
		313	if (!sdvo_lvds_options)
		314	return;
		315
		316	index = sdvo_lvds_options->panel_type;
		317	}
		318
		319	dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
		320	if (!dvo_timing)
		321	return;
		322
		323	panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
		324	if (!panel_fixed_mode)
		325	return;
		326
		327	fill_detail_timing_data(panel_fixed_mode, dvo_timing + index);
		328
4104	Serge	329	dev_priv->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode;
2351	Serge	330
		331	DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
		332	drm_mode_debug_printmodeline(panel_fixed_mode);
		333	}
		334
6937	serge	335	static int intel_bios_ssc_frequency(struct drm_i915_private *dev_priv,
2351	Serge	336	bool alternate)
		337	{
6937	serge	338	switch (INTEL_INFO(dev_priv)->gen) {
2351	Serge	339	case 2:
4560	Serge	340	return alternate ? 66667 : 48000;
2351	Serge	341	case 3:
		342	case 4:
4560	Serge	343	return alternate ? 100000 : 96000;
2351	Serge	344	default:
4560	Serge	345	return alternate ? 100000 : 120000;
2351	Serge	346	}
		347	}
		348
		349	static void
		350	parse_general_features(struct drm_i915_private *dev_priv,
6084	serge	351	const struct bdb_header *bdb)
2351	Serge	352	{
6084	serge	353	const struct bdb_general_features *general;
2351	Serge	354
		355	general = find_section(bdb, BDB_GENERAL_FEATURES);
6937	serge	356	if (!general)
		357	return;
		358
4104	Serge	359	dev_priv->vbt.int_tv_support = general->int_tv_support;
6937	serge	360	/* int_crt_support can't be trusted on earlier platforms */
		361	if (bdb->version >= 155 &&
		362	(HAS_DDI(dev_priv) \|\| IS_VALLEYVIEW(dev_priv)))
4104	Serge	363	dev_priv->vbt.int_crt_support = general->int_crt_support;
		364	dev_priv->vbt.lvds_use_ssc = general->enable_ssc;
		365	dev_priv->vbt.lvds_ssc_freq =
6937	serge	366	intel_bios_ssc_frequency(dev_priv, general->ssc_freq);
4104	Serge	367	dev_priv->vbt.display_clock_mode = general->display_clock_mode;
		368	dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
3746	Serge	369	DRM_DEBUG_KMS("BDB_GENERAL_FEATURES int_tv_support %d int_crt_support %d lvds_use_ssc %d lvds_ssc_freq %d display_clock_mode %d fdi_rx_polarity_inverted %d\n",
4104	Serge	370	dev_priv->vbt.int_tv_support,
		371	dev_priv->vbt.int_crt_support,
		372	dev_priv->vbt.lvds_use_ssc,
		373	dev_priv->vbt.lvds_ssc_freq,
		374	dev_priv->vbt.display_clock_mode,
		375	dev_priv->vbt.fdi_rx_polarity_inverted);
2351	Serge	376	}
		377
		378	static void
		379	parse_general_definitions(struct drm_i915_private *dev_priv,
6084	serge	380	const struct bdb_header *bdb)
2351	Serge	381	{
6084	serge	382	const struct bdb_general_definitions *general;
2351	Serge	383
		384	general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
		385	if (general) {
		386	u16 block_size = get_blocksize(general);
		387	if (block_size >= sizeof(*general)) {
		388	int bus_pin = general->crt_ddc_gmbus_pin;
		389	DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
6084	serge	390	if (intel_gmbus_is_valid_pin(dev_priv, bus_pin))
4104	Serge	391	dev_priv->vbt.crt_ddc_pin = bus_pin;
2351	Serge	392	} else {
		393	DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
6084	serge	394	block_size);
2351	Serge	395	}
		396	}
		397	}
		398
6084	serge	399	static const union child_device_config *
		400	child_device_ptr(const struct bdb_general_definitions *p_defs, int i)
		401	{
		402	return (const void ) &p_defs->devices[i p_defs->child_dev_size];
		403	}
		404
2351	Serge	405	static void
		406	parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
6084	serge	407	const struct bdb_header *bdb)
2351	Serge	408	{
		409	struct sdvo_device_mapping *p_mapping;
6084	serge	410	const struct bdb_general_definitions *p_defs;
		411	const struct old_child_dev_config child; / legacy */
2351	Serge	412	int i, child_device_num, count;
		413	u16 block_size;
		414
		415	p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
		416	if (!p_defs) {
		417	DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
		418	return;
		419	}
6084	serge	420
		421	/*
		422	* Only parse SDVO mappings when the general definitions block child
		423	* device size matches that of the legacy child device config
		424	* struct. Thus, SDVO mapping will be skipped for newer VBT.
2351	Serge	425	*/
6084	serge	426	if (p_defs->child_dev_size != sizeof(*child)) {
		427	DRM_DEBUG_KMS("Unsupported child device size for SDVO mapping.\n");
2351	Serge	428	return;
		429	}
		430	/* get the block size of general definitions */
		431	block_size = get_blocksize(p_defs);
		432	/* get the number of child device */
		433	child_device_num = (block_size - sizeof(*p_defs)) /
6084	serge	434	p_defs->child_dev_size;
2351	Serge	435	count = 0;
		436	for (i = 0; i < child_device_num; i++) {
6084	serge	437	child = &child_device_ptr(p_defs, i)->old;
		438	if (!child->device_type) {
2351	Serge	439	/* skip the device block if device type is invalid */
		440	continue;
		441	}
6084	serge	442	if (child->slave_addr != SLAVE_ADDR1 &&
		443	child->slave_addr != SLAVE_ADDR2) {
2351	Serge	444	/*
		445	* If the slave address is neither 0x70 nor 0x72,
		446	* it is not a SDVO device. Skip it.
		447	*/
		448	continue;
		449	}
6084	serge	450	if (child->dvo_port != DEVICE_PORT_DVOB &&
		451	child->dvo_port != DEVICE_PORT_DVOC) {
2351	Serge	452	/* skip the incorrect SDVO port */
		453	DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
		454	continue;
		455	}
		456	DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
6084	serge	457	" %s port\n",
		458	child->slave_addr,
		459	(child->dvo_port == DEVICE_PORT_DVOB) ?
		460	"SDVOB" : "SDVOC");
		461	p_mapping = &(dev_priv->sdvo_mappings[child->dvo_port - 1]);
2351	Serge	462	if (!p_mapping->initialized) {
6084	serge	463	p_mapping->dvo_port = child->dvo_port;
		464	p_mapping->slave_addr = child->slave_addr;
		465	p_mapping->dvo_wiring = child->dvo_wiring;
		466	p_mapping->ddc_pin = child->ddc_pin;
		467	p_mapping->i2c_pin = child->i2c_pin;
2351	Serge	468	p_mapping->initialized = 1;
		469	DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
		470	p_mapping->dvo_port,
		471	p_mapping->slave_addr,
		472	p_mapping->dvo_wiring,
		473	p_mapping->ddc_pin,
		474	p_mapping->i2c_pin);
		475	} else {
		476	DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
		477	"two SDVO device.\n");
		478	}
6084	serge	479	if (child->slave2_addr) {
2351	Serge	480	/* Maybe this is a SDVO device with multiple inputs */
		481	/* And the mapping info is not added */
		482	DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
		483	" is a SDVO device with multiple inputs.\n");
		484	}
		485	count++;
		486	}
		487
		488	if (!count) {
		489	/* No SDVO device info is found */
		490	DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
		491	}
		492	return;
		493	}
		494
		495	static void
		496	parse_driver_features(struct drm_i915_private *dev_priv,
6084	serge	497	const struct bdb_header *bdb)
2351	Serge	498	{
6084	serge	499	const struct bdb_driver_features *driver;
2351	Serge	500
		501	driver = find_section(bdb, BDB_DRIVER_FEATURES);
		502	if (!driver)
		503	return;
		504
4560	Serge	505	if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
4104	Serge	506	dev_priv->vbt.edp_support = 1;
2351	Serge	507
		508	if (driver->dual_frequency)
		509	dev_priv->render_reclock_avail = true;
5060	serge	510
		511	DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver->drrs_enabled);
		512	/*
		513	* If DRRS is not supported, drrs_type has to be set to 0.
		514	* This is because, VBT is configured in such a way that
		515	* static DRRS is 0 and DRRS not supported is represented by
		516	* driver->drrs_enabled=false
		517	*/
		518	if (!driver->drrs_enabled)
		519	dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
2351	Serge	520	}
		521
		522	static void
6084	serge	523	parse_edp(struct drm_i915_private dev_priv, const struct bdb_header bdb)
2351	Serge	524	{
6084	serge	525	const struct bdb_edp *edp;
		526	const struct edp_power_seq *edp_pps;
		527	const struct edp_link_params *edp_link_params;
2351	Serge	528
		529	edp = find_section(bdb, BDB_EDP);
		530	if (!edp) {
4560	Serge	531	if (dev_priv->vbt.edp_support)
3120	serge	532	DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
2351	Serge	533	return;
		534	}
		535
		536	switch ((edp->color_depth >> (panel_type * 2)) & 3) {
		537	case EDP_18BPP:
4104	Serge	538	dev_priv->vbt.edp_bpp = 18;
2351	Serge	539	break;
		540	case EDP_24BPP:
4104	Serge	541	dev_priv->vbt.edp_bpp = 24;
2351	Serge	542	break;
		543	case EDP_30BPP:
4104	Serge	544	dev_priv->vbt.edp_bpp = 30;
2351	Serge	545	break;
		546	}
		547
		548	/* Get the eDP sequencing and link info */
		549	edp_pps = &edp->power_seqs[panel_type];
		550	edp_link_params = &edp->link_params[panel_type];
		551
4104	Serge	552	dev_priv->vbt.edp_pps = *edp_pps;
2351	Serge	553
5060	serge	554	switch (edp_link_params->rate) {
		555	case EDP_RATE_1_62:
		556	dev_priv->vbt.edp_rate = DP_LINK_BW_1_62;
		557	break;
		558	case EDP_RATE_2_7:
		559	dev_priv->vbt.edp_rate = DP_LINK_BW_2_7;
		560	break;
		561	default:
		562	DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n",
		563	edp_link_params->rate);
		564	break;
		565	}
		566
2351	Serge	567	switch (edp_link_params->lanes) {
5060	serge	568	case EDP_LANE_1:
4104	Serge	569	dev_priv->vbt.edp_lanes = 1;
2351	Serge	570	break;
5060	serge	571	case EDP_LANE_2:
4104	Serge	572	dev_priv->vbt.edp_lanes = 2;
2351	Serge	573	break;
5060	serge	574	case EDP_LANE_4:
4104	Serge	575	dev_priv->vbt.edp_lanes = 4;
2351	Serge	576	break;
5060	serge	577	default:
		578	DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n",
		579	edp_link_params->lanes);
		580	break;
2351	Serge	581	}
5060	serge	582
2351	Serge	583	switch (edp_link_params->preemphasis) {
5060	serge	584	case EDP_PREEMPHASIS_NONE:
5354	serge	585	dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_0;
2351	Serge	586	break;
5060	serge	587	case EDP_PREEMPHASIS_3_5dB:
5354	serge	588	dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_1;
2351	Serge	589	break;
5060	serge	590	case EDP_PREEMPHASIS_6dB:
5354	serge	591	dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_2;
2351	Serge	592	break;
5060	serge	593	case EDP_PREEMPHASIS_9_5dB:
5354	serge	594	dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_3;
2351	Serge	595	break;
5060	serge	596	default:
		597	DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n",
		598	edp_link_params->preemphasis);
		599	break;
2351	Serge	600	}
5060	serge	601
2351	Serge	602	switch (edp_link_params->vswing) {
5060	serge	603	case EDP_VSWING_0_4V:
5354	serge	604	dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
2351	Serge	605	break;
5060	serge	606	case EDP_VSWING_0_6V:
5354	serge	607	dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_1;
2351	Serge	608	break;
5060	serge	609	case EDP_VSWING_0_8V:
5354	serge	610	dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
2351	Serge	611	break;
5060	serge	612	case EDP_VSWING_1_2V:
5354	serge	613	dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
2351	Serge	614	break;
5060	serge	615	default:
		616	DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n",
		617	edp_link_params->vswing);
		618	break;
2351	Serge	619	}
6084	serge	620
		621	if (bdb->version >= 173) {
		622	uint8_t vswing;
		623
		624	/* Don't read from VBT if module parameter has valid value*/
		625	if (i915.edp_vswing) {
		626	dev_priv->edp_low_vswing = i915.edp_vswing == 1;
		627	} else {
		628	vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF;
		629	dev_priv->edp_low_vswing = vswing == 0;
		630	}
		631	}
2351	Serge	632	}
		633
6084	serge	634	static void
		635	parse_psr(struct drm_i915_private dev_priv, const struct bdb_header bdb)
		636	{
		637	const struct bdb_psr *psr;
		638	const struct psr_table *psr_table;
		639
		640	psr = find_section(bdb, BDB_PSR);
		641	if (!psr) {
		642	DRM_DEBUG_KMS("No PSR BDB found.\n");
		643	return;
		644	}
		645
		646	psr_table = &psr->psr_table[panel_type];
		647
		648	dev_priv->vbt.psr.full_link = psr_table->full_link;
		649	dev_priv->vbt.psr.require_aux_wakeup = psr_table->require_aux_to_wakeup;
		650
		651	/* Allowed VBT values goes from 0 to 15 */
		652	dev_priv->vbt.psr.idle_frames = psr_table->idle_frames < 0 ? 0 :
		653	psr_table->idle_frames > 15 ? 15 : psr_table->idle_frames;
		654
		655	switch (psr_table->lines_to_wait) {
		656	case 0:
		657	dev_priv->vbt.psr.lines_to_wait = PSR_0_LINES_TO_WAIT;
		658	break;
		659	case 1:
		660	dev_priv->vbt.psr.lines_to_wait = PSR_1_LINE_TO_WAIT;
		661	break;
		662	case 2:
		663	dev_priv->vbt.psr.lines_to_wait = PSR_4_LINES_TO_WAIT;
		664	break;
		665	case 3:
		666	dev_priv->vbt.psr.lines_to_wait = PSR_8_LINES_TO_WAIT;
		667	break;
		668	default:
		669	DRM_DEBUG_KMS("VBT has unknown PSR lines to wait %u\n",
		670	psr_table->lines_to_wait);
		671	break;
		672	}
		673
		674	dev_priv->vbt.psr.tp1_wakeup_time = psr_table->tp1_wakeup_time;
		675	dev_priv->vbt.psr.tp2_tp3_wakeup_time = psr_table->tp2_tp3_wakeup_time;
		676	}
		677
5060	serge	678	static u8 goto_next_sequence(u8 data, int *size)
		679	{
		680	u16 len;
		681	int tmp = *size;
		682
		683	if (--tmp < 0)
		684	return NULL;
		685
		686	/* goto first element */
		687	data++;
		688	while (1) {
		689	switch (*data) {
		690	case MIPI_SEQ_ELEM_SEND_PKT:
		691	/*
		692	* skip by this element payload size
		693	* skip elem id, command flag and data type
		694	*/
		695	tmp -= 5;
		696	if (tmp < 0)
		697	return NULL;
		698
		699	data += 3;
		700	len = ((u16 )data);
		701
		702	tmp -= len;
		703	if (tmp < 0)
		704	return NULL;
		705
		706	/* skip by len */
		707	data = data + 2 + len;
		708	break;
		709	case MIPI_SEQ_ELEM_DELAY:
		710	/* skip by elem id, and delay is 4 bytes */
		711	tmp -= 5;
		712	if (tmp < 0)
		713	return NULL;
		714
		715	data += 5;
		716	break;
		717	case MIPI_SEQ_ELEM_GPIO:
		718	tmp -= 3;
		719	if (tmp < 0)
		720	return NULL;
		721
		722	data += 3;
		723	break;
		724	default:
		725	DRM_ERROR("Unknown element\n");
		726	return NULL;
		727	}
		728
		729	/* end of sequence ? */
		730	if (*data == 0)
		731	break;
		732	}
		733
		734	/* goto next sequence or end of block byte */
		735	if (--tmp < 0)
		736	return NULL;
		737
		738	data++;
		739
		740	/* update amount of data left for the sequence block to be parsed */
		741	*size = tmp;
		742	return data;
		743	}
		744
2351	Serge	745	static void
6084	serge	746	parse_mipi(struct drm_i915_private dev_priv, const struct bdb_header bdb)
4560	Serge	747	{
6084	serge	748	const struct bdb_mipi_config *start;
		749	const struct bdb_mipi_sequence *sequence;
		750	const struct mipi_config *config;
		751	const struct mipi_pps_data *pps;
		752	u8 *data;
		753	const u8 *seq_data;
5060	serge	754	int i, panel_id, seq_size;
		755	u16 block_size;
4560	Serge	756
5060	serge	757	/* parse MIPI blocks only if LFP type is MIPI */
		758	if (!dev_priv->vbt.has_mipi)
4560	Serge	759	return;
5060	serge	760
		761	/* Initialize this to undefined indicating no generic MIPI support */
		762	dev_priv->vbt.dsi.panel_id = MIPI_DSI_UNDEFINED_PANEL_ID;
		763
		764	/* Block #40 is already parsed and panel_fixed_mode is
		765	* stored in dev_priv->lfp_lvds_vbt_mode
		766	* resuse this when needed
		767	*/
		768
		769	/* Parse #52 for panel index used from panel_type already
		770	* parsed
		771	*/
		772	start = find_section(bdb, BDB_MIPI_CONFIG);
		773	if (!start) {
		774	DRM_DEBUG_KMS("No MIPI config BDB found");
		775	return;
4560	Serge	776	}
		777
5060	serge	778	DRM_DEBUG_DRIVER("Found MIPI Config block, panel index = %d\n",
		779	panel_type);
		780
		781	/*
		782	* get hold of the correct configuration block and pps data as per
		783	* the panel_type as index
		784	*/
		785	config = &start->config[panel_type];
		786	pps = &start->pps[panel_type];
		787
		788	/* store as of now full data. Trim when we realise all is not needed */
		789	dev_priv->vbt.dsi.config = kmemdup(config, sizeof(struct mipi_config), GFP_KERNEL);
		790	if (!dev_priv->vbt.dsi.config)
		791	return;
		792
		793	dev_priv->vbt.dsi.pps = kmemdup(pps, sizeof(struct mipi_pps_data), GFP_KERNEL);
		794	if (!dev_priv->vbt.dsi.pps) {
		795	kfree(dev_priv->vbt.dsi.config);
		796	return;
		797	}
		798
		799	/* We have mandatory mipi config blocks. Initialize as generic panel */
		800	dev_priv->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID;
		801
		802	/* Check if we have sequence block as well */
		803	sequence = find_section(bdb, BDB_MIPI_SEQUENCE);
		804	if (!sequence) {
		805	DRM_DEBUG_KMS("No MIPI Sequence found, parsing complete\n");
		806	return;
		807	}
		808
6084	serge	809	/* Fail gracefully for forward incompatible sequence block. */
		810	if (sequence->version >= 3) {
		811	DRM_ERROR("Unable to parse MIPI Sequence Block v3+\n");
		812	return;
		813	}
		814
5060	serge	815	DRM_DEBUG_DRIVER("Found MIPI sequence block\n");
		816
		817	block_size = get_blocksize(sequence);
		818
		819	/*
		820	* parse the sequence block for individual sequences
		821	*/
		822	dev_priv->vbt.dsi.seq_version = sequence->version;
		823
		824	seq_data = &sequence->data[0];
		825
		826	/*
		827	* sequence block is variable length and hence we need to parse and
		828	* get the sequence data for specific panel id
		829	*/
		830	for (i = 0; i < MAX_MIPI_CONFIGURATIONS; i++) {
		831	panel_id = *seq_data;
		832	seq_size = ((u16 ) (seq_data + 1));
		833	if (panel_id == panel_type)
		834	break;
		835
		836	/* skip the sequence including seq header of 3 bytes */
		837	seq_data = seq_data + 3 + seq_size;
		838	if ((seq_data - &sequence->data[0]) > block_size) {
		839	DRM_ERROR("Sequence start is beyond sequence block size, corrupted sequence block\n");
		840	return;
		841	}
		842	}
		843
		844	if (i == MAX_MIPI_CONFIGURATIONS) {
		845	DRM_ERROR("Sequence block detected but no valid configuration\n");
		846	return;
		847	}
		848
		849	/* check if found sequence is completely within the sequence block
		850	* just being paranoid */
		851	if (seq_size > block_size) {
		852	DRM_ERROR("Corrupted sequence/size, bailing out\n");
		853	return;
		854	}
		855
		856	/* skip the panel id(1 byte) and seq size(2 bytes) */
		857	dev_priv->vbt.dsi.data = kmemdup(seq_data + 3, seq_size, GFP_KERNEL);
		858	if (!dev_priv->vbt.dsi.data)
		859	return;
		860
		861	/*
		862	* loop into the sequence data and split into multiple sequneces
		863	* There are only 5 types of sequences as of now
		864	*/
		865	data = dev_priv->vbt.dsi.data;
		866	dev_priv->vbt.dsi.size = seq_size;
		867
		868	/* two consecutive 0x00 indicate end of all sequences */
		869	while (1) {
		870	int seq_id = *data;
		871	if (MIPI_SEQ_MAX > seq_id && seq_id > MIPI_SEQ_UNDEFINED) {
		872	dev_priv->vbt.dsi.sequence[seq_id] = data;
		873	DRM_DEBUG_DRIVER("Found mipi sequence - %d\n", seq_id);
		874	} else {
		875	DRM_ERROR("undefined sequence\n");
		876	goto err;
		877	}
		878
		879	/* partial parsing to skip elements */
		880	data = goto_next_sequence(data, &seq_size);
		881
		882	if (data == NULL) {
		883	DRM_ERROR("Sequence elements going beyond block itself. Sequence block parsing failed\n");
		884	goto err;
		885	}
		886
		887	if (*data == 0)
		888	break; /* end of sequence reached */
		889	}
		890
		891	DRM_DEBUG_DRIVER("MIPI related vbt parsing complete\n");
		892	return;
		893	err:
		894	kfree(dev_priv->vbt.dsi.data);
		895	dev_priv->vbt.dsi.data = NULL;
		896
		897	/* error during parsing so set all pointers to null
		898	* because of partial parsing */
		899	memset(dev_priv->vbt.dsi.sequence, 0, sizeof(dev_priv->vbt.dsi.sequence));
4560	Serge	900	}
		901
6084	serge	902	static u8 translate_iboost(u8 val)
		903	{
		904	static const u8 mapping[] = { 1, 3, 7 }; /* See VBT spec */
		905
		906	if (val >= ARRAY_SIZE(mapping)) {
		907	DRM_DEBUG_KMS("Unsupported I_boost value found in VBT (%d), display may not work properly\n", val);
		908	return 0;
		909	}
		910	return mapping[val];
		911	}
		912
4560	Serge	913	static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
6084	serge	914	const struct bdb_header *bdb)
4560	Serge	915	{
		916	union child_device_config it, child = NULL;
		917	struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port];
		918	uint8_t hdmi_level_shift;
		919	int i, j;
		920	bool is_dvi, is_hdmi, is_dp, is_edp, is_crt;
6084	serge	921	uint8_t aux_channel, ddc_pin;
4560	Serge	922	/* Each DDI port can have more than one value on the "DVO Port" field,
		923	* so look for all the possible values for each port and abort if more
		924	* than one is found. */
6084	serge	925	int dvo_ports[][3] = {
		926	{DVO_PORT_HDMIA, DVO_PORT_DPA, -1},
		927	{DVO_PORT_HDMIB, DVO_PORT_DPB, -1},
		928	{DVO_PORT_HDMIC, DVO_PORT_DPC, -1},
		929	{DVO_PORT_HDMID, DVO_PORT_DPD, -1},
		930	{DVO_PORT_CRT, DVO_PORT_HDMIE, DVO_PORT_DPE},
4560	Serge	931	};
		932
		933	/* Find the child device to use, abort if more than one found. */
		934	for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
		935	it = dev_priv->vbt.child_dev + i;
		936
6084	serge	937	for (j = 0; j < 3; j++) {
4560	Serge	938	if (dvo_ports[port][j] == -1)
		939	break;
		940
		941	if (it->common.dvo_port == dvo_ports[port][j]) {
		942	if (child) {
		943	DRM_DEBUG_KMS("More than one child device for port %c in VBT.\n",
		944	port_name(port));
		945	return;
		946	}
		947	child = it;
		948	}
		949	}
		950	}
		951	if (!child)
		952	return;
		953
		954	aux_channel = child->raw[25];
6084	serge	955	ddc_pin = child->common.ddc_pin;
4560	Serge	956
		957	is_dvi = child->common.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
		958	is_dp = child->common.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
		959	is_crt = child->common.device_type & DEVICE_TYPE_ANALOG_OUTPUT;
		960	is_hdmi = is_dvi && (child->common.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
		961	is_edp = is_dp && (child->common.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR);
		962
		963	info->supports_dvi = is_dvi;
		964	info->supports_hdmi = is_hdmi;
		965	info->supports_dp = is_dp;
		966
		967	DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n",
		968	port_name(port), is_dp, is_hdmi, is_dvi, is_edp, is_crt);
		969
		970	if (is_edp && is_dvi)
		971	DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
		972	port_name(port));
		973	if (is_crt && port != PORT_E)
		974	DRM_DEBUG_KMS("Port %c is analog\n", port_name(port));
		975	if (is_crt && (is_dvi \|\| is_dp))
		976	DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
		977	port_name(port));
		978	if (is_dvi && (port == PORT_A \|\| port == PORT_E))
5354	serge	979	DRM_DEBUG_KMS("Port %c is TMDS compatible\n", port_name(port));
4560	Serge	980	if (!is_dvi && !is_dp && !is_crt)
		981	DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
		982	port_name(port));
		983	if (is_edp && (port == PORT_B \|\| port == PORT_C \|\| port == PORT_E))
		984	DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port));
		985
		986	if (is_dvi) {
6084	serge	987	if (port == PORT_E) {
		988	info->alternate_ddc_pin = ddc_pin;
		989	/* if DDIE share ddc pin with other port, then
		990	* dvi/hdmi couldn't exist on the shared port.
		991	* Otherwise they share the same ddc bin and system
		992	* couldn't communicate with them seperately. */
		993	if (ddc_pin == DDC_PIN_B) {
		994	dev_priv->vbt.ddi_port_info[PORT_B].supports_dvi = 0;
		995	dev_priv->vbt.ddi_port_info[PORT_B].supports_hdmi = 0;
		996	} else if (ddc_pin == DDC_PIN_C) {
		997	dev_priv->vbt.ddi_port_info[PORT_C].supports_dvi = 0;
		998	dev_priv->vbt.ddi_port_info[PORT_C].supports_hdmi = 0;
		999	} else if (ddc_pin == DDC_PIN_D) {
		1000	dev_priv->vbt.ddi_port_info[PORT_D].supports_dvi = 0;
		1001	dev_priv->vbt.ddi_port_info[PORT_D].supports_hdmi = 0;
		1002	}
		1003	} else if (ddc_pin == DDC_PIN_B && port != PORT_B)
4560	Serge	1004	DRM_DEBUG_KMS("Unexpected DDC pin for port B\n");
6084	serge	1005	else if (ddc_pin == DDC_PIN_C && port != PORT_C)
4560	Serge	1006	DRM_DEBUG_KMS("Unexpected DDC pin for port C\n");
6084	serge	1007	else if (ddc_pin == DDC_PIN_D && port != PORT_D)
4560	Serge	1008	DRM_DEBUG_KMS("Unexpected DDC pin for port D\n");
		1009	}
		1010
		1011	if (is_dp) {
6084	serge	1012	if (port == PORT_E) {
		1013	info->alternate_aux_channel = aux_channel;
		1014	/* if DDIE share aux channel with other port, then
		1015	* DP couldn't exist on the shared port. Otherwise
		1016	* they share the same aux channel and system
		1017	* couldn't communicate with them seperately. */
		1018	if (aux_channel == DP_AUX_A)
		1019	dev_priv->vbt.ddi_port_info[PORT_A].supports_dp = 0;
		1020	else if (aux_channel == DP_AUX_B)
		1021	dev_priv->vbt.ddi_port_info[PORT_B].supports_dp = 0;
		1022	else if (aux_channel == DP_AUX_C)
		1023	dev_priv->vbt.ddi_port_info[PORT_C].supports_dp = 0;
		1024	else if (aux_channel == DP_AUX_D)
		1025	dev_priv->vbt.ddi_port_info[PORT_D].supports_dp = 0;
		1026	}
		1027	else if (aux_channel == DP_AUX_A && port != PORT_A)
4560	Serge	1028	DRM_DEBUG_KMS("Unexpected AUX channel for port A\n");
6084	serge	1029	else if (aux_channel == DP_AUX_B && port != PORT_B)
4560	Serge	1030	DRM_DEBUG_KMS("Unexpected AUX channel for port B\n");
6084	serge	1031	else if (aux_channel == DP_AUX_C && port != PORT_C)
4560	Serge	1032	DRM_DEBUG_KMS("Unexpected AUX channel for port C\n");
6084	serge	1033	else if (aux_channel == DP_AUX_D && port != PORT_D)
4560	Serge	1034	DRM_DEBUG_KMS("Unexpected AUX channel for port D\n");
		1035	}
		1036
		1037	if (bdb->version >= 158) {
		1038	/* The VBT HDMI level shift values match the table we have. */
		1039	hdmi_level_shift = child->raw[7] & 0xF;
6084	serge	1040	DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
		1041	port_name(port),
		1042	hdmi_level_shift);
		1043	info->hdmi_level_shift = hdmi_level_shift;
		1044	}
		1045
		1046	/* Parse the I_boost config for SKL and above */
		1047	if (bdb->version >= 196 && (child->common.flags_1 & IBOOST_ENABLE)) {
		1048	info->dp_boost_level = translate_iboost(child->common.iboost_level & 0xF);
		1049	DRM_DEBUG_KMS("VBT (e)DP boost level for port %c: %d\n",
		1050	port_name(port), info->dp_boost_level);
		1051	info->hdmi_boost_level = translate_iboost(child->common.iboost_level >> 4);
		1052	DRM_DEBUG_KMS("VBT HDMI boost level for port %c: %d\n",
		1053	port_name(port), info->hdmi_boost_level);
		1054	}
4560	Serge	1055	}
		1056
		1057	static void parse_ddi_ports(struct drm_i915_private *dev_priv,
6084	serge	1058	const struct bdb_header *bdb)
4560	Serge	1059	{
		1060	enum port port;
		1061
6937	serge	1062	if (!HAS_DDI(dev_priv))
4560	Serge	1063	return;
		1064
		1065	if (!dev_priv->vbt.child_dev_num)
		1066	return;
		1067
		1068	if (bdb->version < 155)
		1069	return;
		1070
		1071	for (port = PORT_A; port < I915_MAX_PORTS; port++)
		1072	parse_ddi_port(dev_priv, port, bdb);
		1073	}
		1074
		1075	static void
2351	Serge	1076	parse_device_mapping(struct drm_i915_private *dev_priv,
6084	serge	1077	const struct bdb_header *bdb)
2351	Serge	1078	{
6084	serge	1079	const struct bdb_general_definitions *p_defs;
		1080	const union child_device_config *p_child;
		1081	union child_device_config *child_dev_ptr;
2351	Serge	1082	int i, child_device_num, count;
6084	serge	1083	u8 expected_size;
		1084	u16 block_size;
2351	Serge	1085
		1086	p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
		1087	if (!p_defs) {
		1088	DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
		1089	return;
		1090	}
6084	serge	1091	if (bdb->version < 195) {
		1092	expected_size = sizeof(struct old_child_dev_config);
		1093	} else if (bdb->version == 195) {
		1094	expected_size = 37;
		1095	} else if (bdb->version <= 197) {
		1096	expected_size = 38;
		1097	} else {
		1098	expected_size = 38;
		1099	BUILD_BUG_ON(sizeof(*p_child) < 38);
		1100	DRM_DEBUG_DRIVER("Expected child device config size for VBT version %u not known; assuming %u\n",
		1101	bdb->version, expected_size);
		1102	}
		1103
		1104	/* The legacy sized child device config is the minimum we need. */
		1105	if (p_defs->child_dev_size < sizeof(struct old_child_dev_config)) {
		1106	DRM_ERROR("Child device config size %u is too small.\n",
		1107	p_defs->child_dev_size);
2351	Serge	1108	return;
		1109	}
6084	serge	1110
		1111	/* Flag an error for unexpected size, but continue anyway. */
		1112	if (p_defs->child_dev_size != expected_size)
		1113	DRM_ERROR("Unexpected child device config size %u (expected %u for VBT version %u)\n",
		1114	p_defs->child_dev_size, expected_size, bdb->version);
		1115
2351	Serge	1116	/* get the block size of general definitions */
		1117	block_size = get_blocksize(p_defs);
		1118	/* get the number of child device */
		1119	child_device_num = (block_size - sizeof(*p_defs)) /
6084	serge	1120	p_defs->child_dev_size;
2351	Serge	1121	count = 0;
		1122	/* get the number of child device that is present */
		1123	for (i = 0; i < child_device_num; i++) {
6084	serge	1124	p_child = child_device_ptr(p_defs, i);
4560	Serge	1125	if (!p_child->common.device_type) {
2351	Serge	1126	/* skip the device block if device type is invalid */
		1127	continue;
		1128	}
		1129	count++;
		1130	}
		1131	if (!count) {
		1132	DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
		1133	return;
		1134	}
4104	Serge	1135	dev_priv->vbt.child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL);
		1136	if (!dev_priv->vbt.child_dev) {
2351	Serge	1137	DRM_DEBUG_KMS("No memory space for child device\n");
		1138	return;
		1139	}
		1140
4104	Serge	1141	dev_priv->vbt.child_dev_num = count;
2351	Serge	1142	count = 0;
		1143	for (i = 0; i < child_device_num; i++) {
6084	serge	1144	p_child = child_device_ptr(p_defs, i);
4560	Serge	1145	if (!p_child->common.device_type) {
2351	Serge	1146	/* skip the device block if device type is invalid */
		1147	continue;
		1148	}
5060	serge	1149
		1150	if (p_child->common.dvo_port >= DVO_PORT_MIPIA
		1151	&& p_child->common.dvo_port <= DVO_PORT_MIPID
		1152	&&p_child->common.device_type & DEVICE_TYPE_MIPI_OUTPUT) {
		1153	DRM_DEBUG_KMS("Found MIPI as LFP\n");
		1154	dev_priv->vbt.has_mipi = 1;
		1155	dev_priv->vbt.dsi.port = p_child->common.dvo_port;
		1156	}
		1157
4104	Serge	1158	child_dev_ptr = dev_priv->vbt.child_dev + count;
2351	Serge	1159	count++;
6084	serge	1160
		1161	/*
		1162	* Copy as much as we know (sizeof) and is available
		1163	* (child_dev_size) of the child device. Accessing the data must
		1164	* depend on VBT version.
		1165	*/
		1166	memcpy(child_dev_ptr, p_child,
		1167	min_t(size_t, p_defs->child_dev_size, sizeof(*p_child)));
2351	Serge	1168	}
		1169	return;
		1170	}
		1171
		1172	static void
		1173	init_vbt_defaults(struct drm_i915_private *dev_priv)
		1174	{
4560	Serge	1175	enum port port;
2351	Serge	1176
6084	serge	1177	dev_priv->vbt.crt_ddc_pin = GMBUS_PIN_VGADDC;
2351	Serge	1178
5060	serge	1179	/* Default to having backlight */
		1180	dev_priv->vbt.backlight.present = true;
		1181
2351	Serge	1182	/* LFP panel data */
4104	Serge	1183	dev_priv->vbt.lvds_dither = 1;
		1184	dev_priv->vbt.lvds_vbt = 0;
2351	Serge	1185
		1186	/* SDVO panel data */
4104	Serge	1187	dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
2351	Serge	1188
		1189	/* general features */
4104	Serge	1190	dev_priv->vbt.int_tv_support = 1;
		1191	dev_priv->vbt.int_crt_support = 1;
2351	Serge	1192
		1193	/* Default to using SSC */
4104	Serge	1194	dev_priv->vbt.lvds_use_ssc = 1;
4560	Serge	1195	/*
		1196	* Core/SandyBridge/IvyBridge use alternative (120MHz) reference
		1197	* clock for LVDS.
		1198	*/
6937	serge	1199	dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev_priv,
		1200	!HAS_PCH_SPLIT(dev_priv));
4560	Serge	1201	DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv->vbt.lvds_ssc_freq);
		1202
		1203	for (port = PORT_A; port < I915_MAX_PORTS; port++) {
		1204	struct ddi_vbt_port_info *info =
		1205	&dev_priv->vbt.ddi_port_info[port];
		1206
5354	serge	1207	info->hdmi_level_shift = HDMI_LEVEL_SHIFT_UNKNOWN;
4560	Serge	1208
		1209	info->supports_dvi = (port != PORT_A && port != PORT_E);
		1210	info->supports_hdmi = info->supports_dvi;
		1211	info->supports_dp = (port != PORT_E);
		1212	}
2351	Serge	1213	}
		1214
6937	serge	1215	static const struct bdb_header get_bdb_header(const struct vbt_header vbt)
5097	serge	1216	{
6937	serge	1217	const void *_vbt = vbt;
		1218
		1219	return _vbt + vbt->bdb_offset;
5097	serge	1220	}
		1221
6937	serge	1222	/**
		1223	* intel_bios_is_valid_vbt - does the given buffer contain a valid VBT
		1224	* @buf: pointer to a buffer to validate
		1225	* @size: size of the buffer
		1226	*
		1227	* Returns true on valid VBT.
		1228	*/
		1229	bool intel_bios_is_valid_vbt(const void *buf, size_t size)
5097	serge	1230	{
6937	serge	1231	const struct vbt_header *vbt = buf;
6084	serge	1232	const struct bdb_header *bdb;
3120	serge	1233
6937	serge	1234	if (!vbt)
		1235	return false;
		1236
		1237	if (sizeof(struct vbt_header) > size) {
5060	serge	1238	DRM_DEBUG_DRIVER("VBT header incomplete\n");
6937	serge	1239	return false;
5060	serge	1240	}
		1241
		1242	if (memcmp(vbt->signature, "$VBT", 4)) {
		1243	DRM_DEBUG_DRIVER("VBT invalid signature\n");
6937	serge	1244	return false;
5060	serge	1245	}
		1246
6937	serge	1247	if (vbt->bdb_offset + sizeof(struct bdb_header) > size) {
5060	serge	1248	DRM_DEBUG_DRIVER("BDB header incomplete\n");
6937	serge	1249	return false;
5060	serge	1250	}
		1251
6937	serge	1252	bdb = get_bdb_header(vbt);
		1253	if (vbt->bdb_offset + bdb->bdb_size > size) {
5060	serge	1254	DRM_DEBUG_DRIVER("BDB incomplete\n");
6937	serge	1255	return false;
5060	serge	1256	}
		1257
6937	serge	1258	return vbt;
5060	serge	1259	}
		1260
6937	serge	1261	static const struct vbt_header find_vbt(void __iomem bios, size_t size)
6084	serge	1262	{
		1263	size_t i;
		1264
		1265	/* Scour memory looking for the VBT signature. */
		1266	for (i = 0; i + 4 < size; i++) {
6937	serge	1267	void *vbt;
		1268
		1269	if (ioread32(bios + i) != ((const u32 ) "$VBT"))
		1270	continue;
		1271
6084	serge	1272	/*
6937	serge	1273	* This is the one place where we explicitly discard the address
		1274	* space (__iomem) of the BIOS/VBT.
6084	serge	1275	*/
6937	serge	1276	vbt = (void __force *) bios + i;
		1277	if (intel_bios_is_valid_vbt(vbt, size - i))
		1278	return vbt;
6084	serge	1279
		1280	break;
		1281	}
		1282
6937	serge	1283	return NULL;
6084	serge	1284	}
		1285
2351	Serge	1286	/**
6937	serge	1287	* intel_bios_init - find VBT and initialize settings from the BIOS
2351	Serge	1288	* @dev: DRM device
		1289	*
		1290	* Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
		1291	* to appropriate values.
		1292	*
		1293	* Returns 0 on success, nonzero on failure.
		1294	*/
3031	serge	1295	int
6937	serge	1296	intel_bios_init(struct drm_i915_private *dev_priv)
2351	Serge	1297	{
6937	serge	1298	struct pci_dev *pdev = dev_priv->dev->pdev;
		1299	const struct vbt_header *vbt = dev_priv->opregion.vbt;
		1300	const struct bdb_header *bdb;
2351	Serge	1301	u8 __iomem *bios = NULL;
		1302
6937	serge	1303	if (HAS_PCH_NOP(dev_priv))
3746	Serge	1304	return -ENODEV;
		1305
2351	Serge	1306	init_vbt_defaults(dev_priv);
		1307
6937	serge	1308	if (!vbt) {
6084	serge	1309	size_t size;
2351	Serge	1310
2360	Serge	1311	bios = pci_map_rom(pdev, &size);
2351	Serge	1312	if (!bios)
		1313	return -1;
		1314
6937	serge	1315	vbt = find_vbt(bios, size);
		1316	if (!vbt) {
2351	Serge	1317	pci_unmap_rom(pdev, bios);
		1318	return -1;
		1319	}
6937	serge	1320
		1321	DRM_DEBUG_KMS("Found valid VBT in PCI ROM\n");
2351	Serge	1322	}
		1323
6937	serge	1324	bdb = get_bdb_header(vbt);
		1325
		1326	DRM_DEBUG_KMS("VBT signature \"%.*s\", BDB version %d\n",
		1327	(int)sizeof(vbt->signature), vbt->signature, bdb->version);
		1328
2351	Serge	1329	/* Grab useful general definitions */
		1330	parse_general_features(dev_priv, bdb);
		1331	parse_general_definitions(dev_priv, bdb);
		1332	parse_lfp_panel_data(dev_priv, bdb);
4560	Serge	1333	parse_lfp_backlight(dev_priv, bdb);
2351	Serge	1334	parse_sdvo_panel_data(dev_priv, bdb);
		1335	parse_sdvo_device_mapping(dev_priv, bdb);
		1336	parse_device_mapping(dev_priv, bdb);
		1337	parse_driver_features(dev_priv, bdb);
		1338	parse_edp(dev_priv, bdb);
6084	serge	1339	parse_psr(dev_priv, bdb);
4560	Serge	1340	parse_mipi(dev_priv, bdb);
		1341	parse_ddi_ports(dev_priv, bdb);
2351	Serge	1342
		1343	if (bios)
		1344	pci_unmap_rom(pdev, bios);
		1345
		1346	return 0;
		1347	}

Subversion Repositories Kolibri OS

(root)/drivers/video/drm/i915/intel_bios.c – Rev 6937