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	*/
5097	serge	27	#include
		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
		335	static int intel_bios_ssc_frequency(struct drm_device *dev,
		336	bool alternate)
		337	{
		338	switch (INTEL_INFO(dev)->gen) {
		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	{
		353	struct drm_device *dev = dev_priv->dev;
6084	serge	354	const struct bdb_general_features *general;
2351	Serge	355
		356	general = find_section(bdb, BDB_GENERAL_FEATURES);
		357	if (general) {
4104	Serge	358	dev_priv->vbt.int_tv_support = general->int_tv_support;
		359	dev_priv->vbt.int_crt_support = general->int_crt_support;
		360	dev_priv->vbt.lvds_use_ssc = general->enable_ssc;
		361	dev_priv->vbt.lvds_ssc_freq =
2351	Serge	362	intel_bios_ssc_frequency(dev, general->ssc_freq);
4104	Serge	363	dev_priv->vbt.display_clock_mode = general->display_clock_mode;
		364	dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
3746	Serge	365	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	366	dev_priv->vbt.int_tv_support,
		367	dev_priv->vbt.int_crt_support,
		368	dev_priv->vbt.lvds_use_ssc,
		369	dev_priv->vbt.lvds_ssc_freq,
		370	dev_priv->vbt.display_clock_mode,
		371	dev_priv->vbt.fdi_rx_polarity_inverted);
2351	Serge	372	}
		373	}
		374
		375	static void
		376	parse_general_definitions(struct drm_i915_private *dev_priv,
6084	serge	377	const struct bdb_header *bdb)
2351	Serge	378	{
6084	serge	379	const struct bdb_general_definitions *general;
2351	Serge	380
		381	general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
		382	if (general) {
		383	u16 block_size = get_blocksize(general);
		384	if (block_size >= sizeof(*general)) {
		385	int bus_pin = general->crt_ddc_gmbus_pin;
		386	DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
6084	serge	387	if (intel_gmbus_is_valid_pin(dev_priv, bus_pin))
4104	Serge	388	dev_priv->vbt.crt_ddc_pin = bus_pin;
2351	Serge	389	} else {
		390	DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
6084	serge	391	block_size);
2351	Serge	392	}
		393	}
		394	}
		395
6084	serge	396	static const union child_device_config *
		397	child_device_ptr(const struct bdb_general_definitions *p_defs, int i)
		398	{
		399	return (const void ) &p_defs->devices[i p_defs->child_dev_size];
		400	}
		401
2351	Serge	402	static void
		403	parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
6084	serge	404	const struct bdb_header *bdb)
2351	Serge	405	{
		406	struct sdvo_device_mapping *p_mapping;
6084	serge	407	const struct bdb_general_definitions *p_defs;
		408	const struct old_child_dev_config child; / legacy */
2351	Serge	409	int i, child_device_num, count;
		410	u16 block_size;
		411
		412	p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
		413	if (!p_defs) {
		414	DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
		415	return;
		416	}
6084	serge	417
		418	/*
		419	* Only parse SDVO mappings when the general definitions block child
		420	* device size matches that of the legacy child device config
		421	* struct. Thus, SDVO mapping will be skipped for newer VBT.
2351	Serge	422	*/
6084	serge	423	if (p_defs->child_dev_size != sizeof(*child)) {
		424	DRM_DEBUG_KMS("Unsupported child device size for SDVO mapping.\n");
2351	Serge	425	return;
		426	}
		427	/* get the block size of general definitions */
		428	block_size = get_blocksize(p_defs);
		429	/* get the number of child device */
		430	child_device_num = (block_size - sizeof(*p_defs)) /
6084	serge	431	p_defs->child_dev_size;
2351	Serge	432	count = 0;
		433	for (i = 0; i < child_device_num; i++) {
6084	serge	434	child = &child_device_ptr(p_defs, i)->old;
		435	if (!child->device_type) {
2351	Serge	436	/* skip the device block if device type is invalid */
		437	continue;
		438	}
6084	serge	439	if (child->slave_addr != SLAVE_ADDR1 &&
		440	child->slave_addr != SLAVE_ADDR2) {
2351	Serge	441	/*
		442	* If the slave address is neither 0x70 nor 0x72,
		443	* it is not a SDVO device. Skip it.
		444	*/
		445	continue;
		446	}
6084	serge	447	if (child->dvo_port != DEVICE_PORT_DVOB &&
		448	child->dvo_port != DEVICE_PORT_DVOC) {
2351	Serge	449	/* skip the incorrect SDVO port */
		450	DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
		451	continue;
		452	}
		453	DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
6084	serge	454	" %s port\n",
		455	child->slave_addr,
		456	(child->dvo_port == DEVICE_PORT_DVOB) ?
		457	"SDVOB" : "SDVOC");
		458	p_mapping = &(dev_priv->sdvo_mappings[child->dvo_port - 1]);
2351	Serge	459	if (!p_mapping->initialized) {
6084	serge	460	p_mapping->dvo_port = child->dvo_port;
		461	p_mapping->slave_addr = child->slave_addr;
		462	p_mapping->dvo_wiring = child->dvo_wiring;
		463	p_mapping->ddc_pin = child->ddc_pin;
		464	p_mapping->i2c_pin = child->i2c_pin;
2351	Serge	465	p_mapping->initialized = 1;
		466	DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
		467	p_mapping->dvo_port,
		468	p_mapping->slave_addr,
		469	p_mapping->dvo_wiring,
		470	p_mapping->ddc_pin,
		471	p_mapping->i2c_pin);
		472	} else {
		473	DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
		474	"two SDVO device.\n");
		475	}
6084	serge	476	if (child->slave2_addr) {
2351	Serge	477	/* Maybe this is a SDVO device with multiple inputs */
		478	/* And the mapping info is not added */
		479	DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
		480	" is a SDVO device with multiple inputs.\n");
		481	}
		482	count++;
		483	}
		484
		485	if (!count) {
		486	/* No SDVO device info is found */
		487	DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
		488	}
		489	return;
		490	}
		491
		492	static void
		493	parse_driver_features(struct drm_i915_private *dev_priv,
6084	serge	494	const struct bdb_header *bdb)
2351	Serge	495	{
6084	serge	496	const struct bdb_driver_features *driver;
2351	Serge	497
		498	driver = find_section(bdb, BDB_DRIVER_FEATURES);
		499	if (!driver)
		500	return;
		501
4560	Serge	502	if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
4104	Serge	503	dev_priv->vbt.edp_support = 1;
2351	Serge	504
		505	if (driver->dual_frequency)
		506	dev_priv->render_reclock_avail = true;
5060	serge	507
		508	DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver->drrs_enabled);
		509	/*
		510	* If DRRS is not supported, drrs_type has to be set to 0.
		511	* This is because, VBT is configured in such a way that
		512	* static DRRS is 0 and DRRS not supported is represented by
		513	* driver->drrs_enabled=false
		514	*/
		515	if (!driver->drrs_enabled)
		516	dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
2351	Serge	517	}
		518
		519	static void
6084	serge	520	parse_edp(struct drm_i915_private dev_priv, const struct bdb_header bdb)
2351	Serge	521	{
6084	serge	522	const struct bdb_edp *edp;
		523	const struct edp_power_seq *edp_pps;
		524	const struct edp_link_params *edp_link_params;
2351	Serge	525
		526	edp = find_section(bdb, BDB_EDP);
		527	if (!edp) {
4560	Serge	528	if (dev_priv->vbt.edp_support)
3120	serge	529	DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
2351	Serge	530	return;
		531	}
		532
		533	switch ((edp->color_depth >> (panel_type * 2)) & 3) {
		534	case EDP_18BPP:
4104	Serge	535	dev_priv->vbt.edp_bpp = 18;
2351	Serge	536	break;
		537	case EDP_24BPP:
4104	Serge	538	dev_priv->vbt.edp_bpp = 24;
2351	Serge	539	break;
		540	case EDP_30BPP:
4104	Serge	541	dev_priv->vbt.edp_bpp = 30;
2351	Serge	542	break;
		543	}
		544
		545	/* Get the eDP sequencing and link info */
		546	edp_pps = &edp->power_seqs[panel_type];
		547	edp_link_params = &edp->link_params[panel_type];
		548
4104	Serge	549	dev_priv->vbt.edp_pps = *edp_pps;
2351	Serge	550
5060	serge	551	switch (edp_link_params->rate) {
		552	case EDP_RATE_1_62:
		553	dev_priv->vbt.edp_rate = DP_LINK_BW_1_62;
		554	break;
		555	case EDP_RATE_2_7:
		556	dev_priv->vbt.edp_rate = DP_LINK_BW_2_7;
		557	break;
		558	default:
		559	DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n",
		560	edp_link_params->rate);
		561	break;
		562	}
		563
2351	Serge	564	switch (edp_link_params->lanes) {
5060	serge	565	case EDP_LANE_1:
4104	Serge	566	dev_priv->vbt.edp_lanes = 1;
2351	Serge	567	break;
5060	serge	568	case EDP_LANE_2:
4104	Serge	569	dev_priv->vbt.edp_lanes = 2;
2351	Serge	570	break;
5060	serge	571	case EDP_LANE_4:
4104	Serge	572	dev_priv->vbt.edp_lanes = 4;
2351	Serge	573	break;
5060	serge	574	default:
		575	DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n",
		576	edp_link_params->lanes);
		577	break;
2351	Serge	578	}
5060	serge	579
2351	Serge	580	switch (edp_link_params->preemphasis) {
5060	serge	581	case EDP_PREEMPHASIS_NONE:
5354	serge	582	dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_0;
2351	Serge	583	break;
5060	serge	584	case EDP_PREEMPHASIS_3_5dB:
5354	serge	585	dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_1;
2351	Serge	586	break;
5060	serge	587	case EDP_PREEMPHASIS_6dB:
5354	serge	588	dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_2;
2351	Serge	589	break;
5060	serge	590	case EDP_PREEMPHASIS_9_5dB:
5354	serge	591	dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_3;
2351	Serge	592	break;
5060	serge	593	default:
		594	DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n",
		595	edp_link_params->preemphasis);
		596	break;
2351	Serge	597	}
5060	serge	598
2351	Serge	599	switch (edp_link_params->vswing) {
5060	serge	600	case EDP_VSWING_0_4V:
5354	serge	601	dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
2351	Serge	602	break;
5060	serge	603	case EDP_VSWING_0_6V:
5354	serge	604	dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_1;
2351	Serge	605	break;
5060	serge	606	case EDP_VSWING_0_8V:
5354	serge	607	dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
2351	Serge	608	break;
5060	serge	609	case EDP_VSWING_1_2V:
5354	serge	610	dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
2351	Serge	611	break;
5060	serge	612	default:
		613	DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n",
		614	edp_link_params->vswing);
		615	break;
2351	Serge	616	}
6084	serge	617
		618	if (bdb->version >= 173) {
		619	uint8_t vswing;
		620
		621	/* Don't read from VBT if module parameter has valid value*/
		622	if (i915.edp_vswing) {
		623	dev_priv->edp_low_vswing = i915.edp_vswing == 1;
		624	} else {
		625	vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF;
		626	dev_priv->edp_low_vswing = vswing == 0;
		627	}
		628	}
2351	Serge	629	}
		630
6084	serge	631	static void
		632	parse_psr(struct drm_i915_private dev_priv, const struct bdb_header bdb)
		633	{
		634	const struct bdb_psr *psr;
		635	const struct psr_table *psr_table;
		636
		637	psr = find_section(bdb, BDB_PSR);
		638	if (!psr) {
		639	DRM_DEBUG_KMS("No PSR BDB found.\n");
		640	return;
		641	}
		642
		643	psr_table = &psr->psr_table[panel_type];
		644
		645	dev_priv->vbt.psr.full_link = psr_table->full_link;
		646	dev_priv->vbt.psr.require_aux_wakeup = psr_table->require_aux_to_wakeup;
		647
		648	/* Allowed VBT values goes from 0 to 15 */
		649	dev_priv->vbt.psr.idle_frames = psr_table->idle_frames < 0 ? 0 :
		650	psr_table->idle_frames > 15 ? 15 : psr_table->idle_frames;
		651
		652	switch (psr_table->lines_to_wait) {
		653	case 0:
		654	dev_priv->vbt.psr.lines_to_wait = PSR_0_LINES_TO_WAIT;
		655	break;
		656	case 1:
		657	dev_priv->vbt.psr.lines_to_wait = PSR_1_LINE_TO_WAIT;
		658	break;
		659	case 2:
		660	dev_priv->vbt.psr.lines_to_wait = PSR_4_LINES_TO_WAIT;
		661	break;
		662	case 3:
		663	dev_priv->vbt.psr.lines_to_wait = PSR_8_LINES_TO_WAIT;
		664	break;
		665	default:
		666	DRM_DEBUG_KMS("VBT has unknown PSR lines to wait %u\n",
		667	psr_table->lines_to_wait);
		668	break;
		669	}
		670
		671	dev_priv->vbt.psr.tp1_wakeup_time = psr_table->tp1_wakeup_time;
		672	dev_priv->vbt.psr.tp2_tp3_wakeup_time = psr_table->tp2_tp3_wakeup_time;
		673	}
		674
5060	serge	675	static u8 goto_next_sequence(u8 data, int *size)
		676	{
		677	u16 len;
		678	int tmp = *size;
		679
		680	if (--tmp < 0)
		681	return NULL;
		682
		683	/* goto first element */
		684	data++;
		685	while (1) {
		686	switch (*data) {
		687	case MIPI_SEQ_ELEM_SEND_PKT:
		688	/*
		689	* skip by this element payload size
		690	* skip elem id, command flag and data type
		691	*/
		692	tmp -= 5;
		693	if (tmp < 0)
		694	return NULL;
		695
		696	data += 3;
		697	len = ((u16 )data);
		698
		699	tmp -= len;
		700	if (tmp < 0)
		701	return NULL;
		702
		703	/* skip by len */
		704	data = data + 2 + len;
		705	break;
		706	case MIPI_SEQ_ELEM_DELAY:
		707	/* skip by elem id, and delay is 4 bytes */
		708	tmp -= 5;
		709	if (tmp < 0)
		710	return NULL;
		711
		712	data += 5;
		713	break;
		714	case MIPI_SEQ_ELEM_GPIO:
		715	tmp -= 3;
		716	if (tmp < 0)
		717	return NULL;
		718
		719	data += 3;
		720	break;
		721	default:
		722	DRM_ERROR("Unknown element\n");
		723	return NULL;
		724	}
		725
		726	/* end of sequence ? */
		727	if (*data == 0)
		728	break;
		729	}
		730
		731	/* goto next sequence or end of block byte */
		732	if (--tmp < 0)
		733	return NULL;
		734
		735	data++;
		736
		737	/* update amount of data left for the sequence block to be parsed */
		738	*size = tmp;
		739	return data;
		740	}
		741
2351	Serge	742	static void
6084	serge	743	parse_mipi(struct drm_i915_private dev_priv, const struct bdb_header bdb)
4560	Serge	744	{
6084	serge	745	const struct bdb_mipi_config *start;
		746	const struct bdb_mipi_sequence *sequence;
		747	const struct mipi_config *config;
		748	const struct mipi_pps_data *pps;
		749	u8 *data;
		750	const u8 *seq_data;
5060	serge	751	int i, panel_id, seq_size;
		752	u16 block_size;
4560	Serge	753
5060	serge	754	/* parse MIPI blocks only if LFP type is MIPI */
		755	if (!dev_priv->vbt.has_mipi)
4560	Serge	756	return;
5060	serge	757
		758	/* Initialize this to undefined indicating no generic MIPI support */
		759	dev_priv->vbt.dsi.panel_id = MIPI_DSI_UNDEFINED_PANEL_ID;
		760
		761	/* Block #40 is already parsed and panel_fixed_mode is
		762	* stored in dev_priv->lfp_lvds_vbt_mode
		763	* resuse this when needed
		764	*/
		765
		766	/* Parse #52 for panel index used from panel_type already
		767	* parsed
		768	*/
		769	start = find_section(bdb, BDB_MIPI_CONFIG);
		770	if (!start) {
		771	DRM_DEBUG_KMS("No MIPI config BDB found");
		772	return;
4560	Serge	773	}
		774
5060	serge	775	DRM_DEBUG_DRIVER("Found MIPI Config block, panel index = %d\n",
		776	panel_type);
		777
		778	/*
		779	* get hold of the correct configuration block and pps data as per
		780	* the panel_type as index
		781	*/
		782	config = &start->config[panel_type];
		783	pps = &start->pps[panel_type];
		784
		785	/* store as of now full data. Trim when we realise all is not needed */
		786	dev_priv->vbt.dsi.config = kmemdup(config, sizeof(struct mipi_config), GFP_KERNEL);
		787	if (!dev_priv->vbt.dsi.config)
		788	return;
		789
		790	dev_priv->vbt.dsi.pps = kmemdup(pps, sizeof(struct mipi_pps_data), GFP_KERNEL);
		791	if (!dev_priv->vbt.dsi.pps) {
		792	kfree(dev_priv->vbt.dsi.config);
		793	return;
		794	}
		795
		796	/* We have mandatory mipi config blocks. Initialize as generic panel */
		797	dev_priv->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID;
		798
		799	/* Check if we have sequence block as well */
		800	sequence = find_section(bdb, BDB_MIPI_SEQUENCE);
		801	if (!sequence) {
		802	DRM_DEBUG_KMS("No MIPI Sequence found, parsing complete\n");
		803	return;
		804	}
		805
6084	serge	806	/* Fail gracefully for forward incompatible sequence block. */
		807	if (sequence->version >= 3) {
		808	DRM_ERROR("Unable to parse MIPI Sequence Block v3+\n");
		809	return;
		810	}
		811
5060	serge	812	DRM_DEBUG_DRIVER("Found MIPI sequence block\n");
		813
		814	block_size = get_blocksize(sequence);
		815
		816	/*
		817	* parse the sequence block for individual sequences
		818	*/
		819	dev_priv->vbt.dsi.seq_version = sequence->version;
		820
		821	seq_data = &sequence->data[0];
		822
		823	/*
		824	* sequence block is variable length and hence we need to parse and
		825	* get the sequence data for specific panel id
		826	*/
		827	for (i = 0; i < MAX_MIPI_CONFIGURATIONS; i++) {
		828	panel_id = *seq_data;
		829	seq_size = ((u16 ) (seq_data + 1));
		830	if (panel_id == panel_type)
		831	break;
		832
		833	/* skip the sequence including seq header of 3 bytes */
		834	seq_data = seq_data + 3 + seq_size;
		835	if ((seq_data - &sequence->data[0]) > block_size) {
		836	DRM_ERROR("Sequence start is beyond sequence block size, corrupted sequence block\n");
		837	return;
		838	}
		839	}
		840
		841	if (i == MAX_MIPI_CONFIGURATIONS) {
		842	DRM_ERROR("Sequence block detected but no valid configuration\n");
		843	return;
		844	}
		845
		846	/* check if found sequence is completely within the sequence block
		847	* just being paranoid */
		848	if (seq_size > block_size) {
		849	DRM_ERROR("Corrupted sequence/size, bailing out\n");
		850	return;
		851	}
		852
		853	/* skip the panel id(1 byte) and seq size(2 bytes) */
		854	dev_priv->vbt.dsi.data = kmemdup(seq_data + 3, seq_size, GFP_KERNEL);
		855	if (!dev_priv->vbt.dsi.data)
		856	return;
		857
		858	/*
		859	* loop into the sequence data and split into multiple sequneces
		860	* There are only 5 types of sequences as of now
		861	*/
		862	data = dev_priv->vbt.dsi.data;
		863	dev_priv->vbt.dsi.size = seq_size;
		864
		865	/* two consecutive 0x00 indicate end of all sequences */
		866	while (1) {
		867	int seq_id = *data;
		868	if (MIPI_SEQ_MAX > seq_id && seq_id > MIPI_SEQ_UNDEFINED) {
		869	dev_priv->vbt.dsi.sequence[seq_id] = data;
		870	DRM_DEBUG_DRIVER("Found mipi sequence - %d\n", seq_id);
		871	} else {
		872	DRM_ERROR("undefined sequence\n");
		873	goto err;
		874	}
		875
		876	/* partial parsing to skip elements */
		877	data = goto_next_sequence(data, &seq_size);
		878
		879	if (data == NULL) {
		880	DRM_ERROR("Sequence elements going beyond block itself. Sequence block parsing failed\n");
		881	goto err;
		882	}
		883
		884	if (*data == 0)
		885	break; /* end of sequence reached */
		886	}
		887
		888	DRM_DEBUG_DRIVER("MIPI related vbt parsing complete\n");
		889	return;
		890	err:
		891	kfree(dev_priv->vbt.dsi.data);
		892	dev_priv->vbt.dsi.data = NULL;
		893
		894	/* error during parsing so set all pointers to null
		895	* because of partial parsing */
		896	memset(dev_priv->vbt.dsi.sequence, 0, sizeof(dev_priv->vbt.dsi.sequence));
4560	Serge	897	}
		898
6084	serge	899	static u8 translate_iboost(u8 val)
		900	{
		901	static const u8 mapping[] = { 1, 3, 7 }; /* See VBT spec */
		902
		903	if (val >= ARRAY_SIZE(mapping)) {
		904	DRM_DEBUG_KMS("Unsupported I_boost value found in VBT (%d), display may not work properly\n", val);
		905	return 0;
		906	}
		907	return mapping[val];
		908	}
		909
4560	Serge	910	static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
6084	serge	911	const struct bdb_header *bdb)
4560	Serge	912	{
		913	union child_device_config it, child = NULL;
		914	struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port];
		915	uint8_t hdmi_level_shift;
		916	int i, j;
		917	bool is_dvi, is_hdmi, is_dp, is_edp, is_crt;
6084	serge	918	uint8_t aux_channel, ddc_pin;
4560	Serge	919	/* Each DDI port can have more than one value on the "DVO Port" field,
		920	* so look for all the possible values for each port and abort if more
		921	* than one is found. */
6084	serge	922	int dvo_ports[][3] = {
		923	{DVO_PORT_HDMIA, DVO_PORT_DPA, -1},
		924	{DVO_PORT_HDMIB, DVO_PORT_DPB, -1},
		925	{DVO_PORT_HDMIC, DVO_PORT_DPC, -1},
		926	{DVO_PORT_HDMID, DVO_PORT_DPD, -1},
		927	{DVO_PORT_CRT, DVO_PORT_HDMIE, DVO_PORT_DPE},
4560	Serge	928	};
		929
		930	/* Find the child device to use, abort if more than one found. */
		931	for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
		932	it = dev_priv->vbt.child_dev + i;
		933
6084	serge	934	for (j = 0; j < 3; j++) {
4560	Serge	935	if (dvo_ports[port][j] == -1)
		936	break;
		937
		938	if (it->common.dvo_port == dvo_ports[port][j]) {
		939	if (child) {
		940	DRM_DEBUG_KMS("More than one child device for port %c in VBT.\n",
		941	port_name(port));
		942	return;
		943	}
		944	child = it;
		945	}
		946	}
		947	}
		948	if (!child)
		949	return;
		950
		951	aux_channel = child->raw[25];
6084	serge	952	ddc_pin = child->common.ddc_pin;
4560	Serge	953
		954	is_dvi = child->common.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
		955	is_dp = child->common.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
		956	is_crt = child->common.device_type & DEVICE_TYPE_ANALOG_OUTPUT;
		957	is_hdmi = is_dvi && (child->common.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
		958	is_edp = is_dp && (child->common.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR);
		959
		960	info->supports_dvi = is_dvi;
		961	info->supports_hdmi = is_hdmi;
		962	info->supports_dp = is_dp;
		963
		964	DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n",
		965	port_name(port), is_dp, is_hdmi, is_dvi, is_edp, is_crt);
		966
		967	if (is_edp && is_dvi)
		968	DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
		969	port_name(port));
		970	if (is_crt && port != PORT_E)
		971	DRM_DEBUG_KMS("Port %c is analog\n", port_name(port));
		972	if (is_crt && (is_dvi \|\| is_dp))
		973	DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
		974	port_name(port));
		975	if (is_dvi && (port == PORT_A \|\| port == PORT_E))
5354	serge	976	DRM_DEBUG_KMS("Port %c is TMDS compatible\n", port_name(port));
4560	Serge	977	if (!is_dvi && !is_dp && !is_crt)
		978	DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
		979	port_name(port));
		980	if (is_edp && (port == PORT_B \|\| port == PORT_C \|\| port == PORT_E))
		981	DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port));
		982
		983	if (is_dvi) {
6084	serge	984	if (port == PORT_E) {
		985	info->alternate_ddc_pin = ddc_pin;
		986	/* if DDIE share ddc pin with other port, then
		987	* dvi/hdmi couldn't exist on the shared port.
		988	* Otherwise they share the same ddc bin and system
		989	* couldn't communicate with them seperately. */
		990	if (ddc_pin == DDC_PIN_B) {
		991	dev_priv->vbt.ddi_port_info[PORT_B].supports_dvi = 0;
		992	dev_priv->vbt.ddi_port_info[PORT_B].supports_hdmi = 0;
		993	} else if (ddc_pin == DDC_PIN_C) {
		994	dev_priv->vbt.ddi_port_info[PORT_C].supports_dvi = 0;
		995	dev_priv->vbt.ddi_port_info[PORT_C].supports_hdmi = 0;
		996	} else if (ddc_pin == DDC_PIN_D) {
		997	dev_priv->vbt.ddi_port_info[PORT_D].supports_dvi = 0;
		998	dev_priv->vbt.ddi_port_info[PORT_D].supports_hdmi = 0;
		999	}
		1000	} else if (ddc_pin == DDC_PIN_B && port != PORT_B)
4560	Serge	1001	DRM_DEBUG_KMS("Unexpected DDC pin for port B\n");
6084	serge	1002	else if (ddc_pin == DDC_PIN_C && port != PORT_C)
4560	Serge	1003	DRM_DEBUG_KMS("Unexpected DDC pin for port C\n");
6084	serge	1004	else if (ddc_pin == DDC_PIN_D && port != PORT_D)
4560	Serge	1005	DRM_DEBUG_KMS("Unexpected DDC pin for port D\n");
		1006	}
		1007
		1008	if (is_dp) {
6084	serge	1009	if (port == PORT_E) {
		1010	info->alternate_aux_channel = aux_channel;
		1011	/* if DDIE share aux channel with other port, then
		1012	* DP couldn't exist on the shared port. Otherwise
		1013	* they share the same aux channel and system
		1014	* couldn't communicate with them seperately. */
		1015	if (aux_channel == DP_AUX_A)
		1016	dev_priv->vbt.ddi_port_info[PORT_A].supports_dp = 0;
		1017	else if (aux_channel == DP_AUX_B)
		1018	dev_priv->vbt.ddi_port_info[PORT_B].supports_dp = 0;
		1019	else if (aux_channel == DP_AUX_C)
		1020	dev_priv->vbt.ddi_port_info[PORT_C].supports_dp = 0;
		1021	else if (aux_channel == DP_AUX_D)
		1022	dev_priv->vbt.ddi_port_info[PORT_D].supports_dp = 0;
		1023	}
		1024	else if (aux_channel == DP_AUX_A && port != PORT_A)
4560	Serge	1025	DRM_DEBUG_KMS("Unexpected AUX channel for port A\n");
6084	serge	1026	else if (aux_channel == DP_AUX_B && port != PORT_B)
4560	Serge	1027	DRM_DEBUG_KMS("Unexpected AUX channel for port B\n");
6084	serge	1028	else if (aux_channel == DP_AUX_C && port != PORT_C)
4560	Serge	1029	DRM_DEBUG_KMS("Unexpected AUX channel for port C\n");
6084	serge	1030	else if (aux_channel == DP_AUX_D && port != PORT_D)
4560	Serge	1031	DRM_DEBUG_KMS("Unexpected AUX channel for port D\n");
		1032	}
		1033
		1034	if (bdb->version >= 158) {
		1035	/* The VBT HDMI level shift values match the table we have. */
		1036	hdmi_level_shift = child->raw[7] & 0xF;
6084	serge	1037	DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
		1038	port_name(port),
		1039	hdmi_level_shift);
		1040	info->hdmi_level_shift = hdmi_level_shift;
		1041	}
		1042
		1043	/* Parse the I_boost config for SKL and above */
		1044	if (bdb->version >= 196 && (child->common.flags_1 & IBOOST_ENABLE)) {
		1045	info->dp_boost_level = translate_iboost(child->common.iboost_level & 0xF);
		1046	DRM_DEBUG_KMS("VBT (e)DP boost level for port %c: %d\n",
		1047	port_name(port), info->dp_boost_level);
		1048	info->hdmi_boost_level = translate_iboost(child->common.iboost_level >> 4);
		1049	DRM_DEBUG_KMS("VBT HDMI boost level for port %c: %d\n",
		1050	port_name(port), info->hdmi_boost_level);
		1051	}
4560	Serge	1052	}
		1053
		1054	static void parse_ddi_ports(struct drm_i915_private *dev_priv,
6084	serge	1055	const struct bdb_header *bdb)
4560	Serge	1056	{
		1057	struct drm_device *dev = dev_priv->dev;
		1058	enum port port;
		1059
		1060	if (!HAS_DDI(dev))
		1061	return;
		1062
		1063	if (!dev_priv->vbt.child_dev_num)
		1064	return;
		1065
		1066	if (bdb->version < 155)
		1067	return;
		1068
		1069	for (port = PORT_A; port < I915_MAX_PORTS; port++)
		1070	parse_ddi_port(dev_priv, port, bdb);
		1071	}
		1072
		1073	static void
2351	Serge	1074	parse_device_mapping(struct drm_i915_private *dev_priv,
6084	serge	1075	const struct bdb_header *bdb)
2351	Serge	1076	{
6084	serge	1077	const struct bdb_general_definitions *p_defs;
		1078	const union child_device_config *p_child;
		1079	union child_device_config *child_dev_ptr;
2351	Serge	1080	int i, child_device_num, count;
6084	serge	1081	u8 expected_size;
		1082	u16 block_size;
2351	Serge	1083
		1084	p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
		1085	if (!p_defs) {
		1086	DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
		1087	return;
		1088	}
6084	serge	1089	if (bdb->version < 195) {
		1090	expected_size = sizeof(struct old_child_dev_config);
		1091	} else if (bdb->version == 195) {
		1092	expected_size = 37;
		1093	} else if (bdb->version <= 197) {
		1094	expected_size = 38;
		1095	} else {
		1096	expected_size = 38;
		1097	BUILD_BUG_ON(sizeof(*p_child) < 38);
		1098	DRM_DEBUG_DRIVER("Expected child device config size for VBT version %u not known; assuming %u\n",
		1099	bdb->version, expected_size);
		1100	}
		1101
		1102	/* The legacy sized child device config is the minimum we need. */
		1103	if (p_defs->child_dev_size < sizeof(struct old_child_dev_config)) {
		1104	DRM_ERROR("Child device config size %u is too small.\n",
		1105	p_defs->child_dev_size);
2351	Serge	1106	return;
		1107	}
6084	serge	1108
		1109	/* Flag an error for unexpected size, but continue anyway. */
		1110	if (p_defs->child_dev_size != expected_size)
		1111	DRM_ERROR("Unexpected child device config size %u (expected %u for VBT version %u)\n",
		1112	p_defs->child_dev_size, expected_size, bdb->version);
		1113
2351	Serge	1114	/* get the block size of general definitions */
		1115	block_size = get_blocksize(p_defs);
		1116	/* get the number of child device */
		1117	child_device_num = (block_size - sizeof(*p_defs)) /
6084	serge	1118	p_defs->child_dev_size;
2351	Serge	1119	count = 0;
		1120	/* get the number of child device that is present */
		1121	for (i = 0; i < child_device_num; i++) {
6084	serge	1122	p_child = child_device_ptr(p_defs, i);
4560	Serge	1123	if (!p_child->common.device_type) {
2351	Serge	1124	/* skip the device block if device type is invalid */
		1125	continue;
		1126	}
		1127	count++;
		1128	}
		1129	if (!count) {
		1130	DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
		1131	return;
		1132	}
4104	Serge	1133	dev_priv->vbt.child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL);
		1134	if (!dev_priv->vbt.child_dev) {
2351	Serge	1135	DRM_DEBUG_KMS("No memory space for child device\n");
		1136	return;
		1137	}
		1138
4104	Serge	1139	dev_priv->vbt.child_dev_num = count;
2351	Serge	1140	count = 0;
		1141	for (i = 0; i < child_device_num; i++) {
6084	serge	1142	p_child = child_device_ptr(p_defs, i);
4560	Serge	1143	if (!p_child->common.device_type) {
2351	Serge	1144	/* skip the device block if device type is invalid */
		1145	continue;
		1146	}
5060	serge	1147
		1148	if (p_child->common.dvo_port >= DVO_PORT_MIPIA
		1149	&& p_child->common.dvo_port <= DVO_PORT_MIPID
		1150	&&p_child->common.device_type & DEVICE_TYPE_MIPI_OUTPUT) {
		1151	DRM_DEBUG_KMS("Found MIPI as LFP\n");
		1152	dev_priv->vbt.has_mipi = 1;
		1153	dev_priv->vbt.dsi.port = p_child->common.dvo_port;
		1154	}
		1155
4104	Serge	1156	child_dev_ptr = dev_priv->vbt.child_dev + count;
2351	Serge	1157	count++;
6084	serge	1158
		1159	/*
		1160	* Copy as much as we know (sizeof) and is available
		1161	* (child_dev_size) of the child device. Accessing the data must
		1162	* depend on VBT version.
		1163	*/
		1164	memcpy(child_dev_ptr, p_child,
		1165	min_t(size_t, p_defs->child_dev_size, sizeof(*p_child)));
2351	Serge	1166	}
		1167	return;
		1168	}
		1169
		1170	static void
		1171	init_vbt_defaults(struct drm_i915_private *dev_priv)
		1172	{
		1173	struct drm_device *dev = dev_priv->dev;
4560	Serge	1174	enum port port;
2351	Serge	1175
6084	serge	1176	dev_priv->vbt.crt_ddc_pin = GMBUS_PIN_VGADDC;
2351	Serge	1177
5060	serge	1178	/* Default to having backlight */
		1179	dev_priv->vbt.backlight.present = true;
		1180
2351	Serge	1181	/* LFP panel data */
4104	Serge	1182	dev_priv->vbt.lvds_dither = 1;
		1183	dev_priv->vbt.lvds_vbt = 0;
2351	Serge	1184
		1185	/* SDVO panel data */
4104	Serge	1186	dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
2351	Serge	1187
		1188	/* general features */
4104	Serge	1189	dev_priv->vbt.int_tv_support = 1;
		1190	dev_priv->vbt.int_crt_support = 1;
2351	Serge	1191
		1192	/* Default to using SSC */
4104	Serge	1193	dev_priv->vbt.lvds_use_ssc = 1;
4560	Serge	1194	/*
		1195	* Core/SandyBridge/IvyBridge use alternative (120MHz) reference
		1196	* clock for LVDS.
		1197	*/
		1198	dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev,
		1199	!HAS_PCH_SPLIT(dev));
		1200	DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv->vbt.lvds_ssc_freq);
		1201
		1202	for (port = PORT_A; port < I915_MAX_PORTS; port++) {
		1203	struct ddi_vbt_port_info *info =
		1204	&dev_priv->vbt.ddi_port_info[port];
		1205
5354	serge	1206	info->hdmi_level_shift = HDMI_LEVEL_SHIFT_UNKNOWN;
4560	Serge	1207
		1208	info->supports_dvi = (port != PORT_A && port != PORT_E);
		1209	info->supports_hdmi = info->supports_dvi;
		1210	info->supports_dp = (port != PORT_E);
		1211	}
2351	Serge	1212	}
		1213
5097	serge	1214	static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
		1215	{
		1216	DRM_DEBUG_KMS("Falling back to manually reading VBT from "
		1217	"VBIOS ROM for %s\n",
		1218	id->ident);
		1219	return 1;
		1220	}
		1221
		1222	static const struct dmi_system_id intel_no_opregion_vbt[] = {
		1223	{
		1224	.callback = intel_no_opregion_vbt_callback,
		1225	.ident = "ThinkCentre A57",
		1226	.matches = {
		1227	DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
		1228	DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
		1229	},
		1230	},
		1231	{ }
		1232	};
		1233
6084	serge	1234	static const struct bdb_header validate_vbt(const void base,
		1235	size_t size,
		1236	const void *_vbt,
		1237	const char *source)
5060	serge	1238	{
6084	serge	1239	size_t offset = _vbt - base;
		1240	const struct vbt_header *vbt = _vbt;
		1241	const struct bdb_header *bdb;
3120	serge	1242
5060	serge	1243	if (offset + sizeof(struct vbt_header) > size) {
		1244	DRM_DEBUG_DRIVER("VBT header incomplete\n");
		1245	return NULL;
		1246	}
		1247
		1248	if (memcmp(vbt->signature, "$VBT", 4)) {
		1249	DRM_DEBUG_DRIVER("VBT invalid signature\n");
		1250	return NULL;
		1251	}
		1252
		1253	offset += vbt->bdb_offset;
		1254	if (offset + sizeof(struct bdb_header) > size) {
		1255	DRM_DEBUG_DRIVER("BDB header incomplete\n");
		1256	return NULL;
		1257	}
		1258
6084	serge	1259	bdb = base + offset;
5060	serge	1260	if (offset + bdb->bdb_size > size) {
		1261	DRM_DEBUG_DRIVER("BDB incomplete\n");
		1262	return NULL;
		1263	}
		1264
		1265	DRM_DEBUG_KMS("Using VBT from %s: %20s\n",
		1266	source, vbt->signature);
		1267	return bdb;
		1268	}
		1269
6084	serge	1270	static const struct bdb_header find_vbt(void __iomem bios, size_t size)
		1271	{
		1272	const struct bdb_header *bdb = NULL;
		1273	size_t i;
		1274
		1275	/* Scour memory looking for the VBT signature. */
		1276	for (i = 0; i + 4 < size; i++) {
		1277	if (ioread32(bios + i) == ((const u32 ) "$VBT")) {
		1278	/*
		1279	* This is the one place where we explicitly discard the
		1280	* address space (__iomem) of the BIOS/VBT. From now on
		1281	* everything is based on 'base', and treated as regular
		1282	* memory.
		1283	*/
		1284	void _bios = (void __force ) bios;
		1285
		1286	bdb = validate_vbt(_bios, size, _bios + i, "PCI ROM");
		1287	break;
		1288	}
		1289	}
		1290
		1291	return bdb;
		1292	}
		1293
2351	Serge	1294	/**
		1295	* intel_parse_bios - find VBT and initialize settings from the BIOS
		1296	* @dev: DRM device
		1297	*
		1298	* Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
		1299	* to appropriate values.
		1300	*
		1301	* Returns 0 on success, nonzero on failure.
		1302	*/
3031	serge	1303	int
2351	Serge	1304	intel_parse_bios(struct drm_device *dev)
		1305	{
		1306	struct drm_i915_private *dev_priv = dev->dev_private;
		1307	struct pci_dev *pdev = dev->pdev;
6084	serge	1308	const struct bdb_header *bdb = NULL;
2351	Serge	1309	u8 __iomem *bios = NULL;
		1310
3746	Serge	1311	if (HAS_PCH_NOP(dev))
		1312	return -ENODEV;
		1313
2351	Serge	1314	init_vbt_defaults(dev_priv);
		1315
		1316	/* XXX Should this validation be moved to intel_opregion.c? */
5097	serge	1317	if (!dmi_check_system(intel_no_opregion_vbt) && dev_priv->opregion.vbt)
6084	serge	1318	bdb = validate_vbt(dev_priv->opregion.header, OPREGION_SIZE,
		1319	dev_priv->opregion.vbt, "OpRegion");
2351	Serge	1320
		1321	if (bdb == NULL) {
6084	serge	1322	size_t size;
2351	Serge	1323
2360	Serge	1324	bios = pci_map_rom(pdev, &size);
2351	Serge	1325	if (!bios)
		1326	return -1;
		1327
6084	serge	1328	bdb = find_vbt(bios, size);
5060	serge	1329	if (!bdb) {
2351	Serge	1330	pci_unmap_rom(pdev, bios);
		1331	return -1;
		1332	}
		1333	}
		1334
		1335	/* Grab useful general definitions */
		1336	parse_general_features(dev_priv, bdb);
		1337	parse_general_definitions(dev_priv, bdb);
		1338	parse_lfp_panel_data(dev_priv, bdb);
4560	Serge	1339	parse_lfp_backlight(dev_priv, bdb);
2351	Serge	1340	parse_sdvo_panel_data(dev_priv, bdb);
		1341	parse_sdvo_device_mapping(dev_priv, bdb);
		1342	parse_device_mapping(dev_priv, bdb);
		1343	parse_driver_features(dev_priv, bdb);
		1344	parse_edp(dev_priv, bdb);
6084	serge	1345	parse_psr(dev_priv, bdb);
4560	Serge	1346	parse_mipi(dev_priv, bdb);
		1347	parse_ddi_ports(dev_priv, bdb);
2351	Serge	1348
		1349	if (bios)
		1350	pci_unmap_rom(pdev, bios);
		1351
		1352	return 0;
		1353	}

Subversion Repositories Kolibri OS

(root)/drivers/video/drm/i915/intel_bios.c – Rev 6084