2 * Copyright © 2006 Intel Corporation
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:
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
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
24 * Eric Anholt <eric@anholt.net>
28 #include <drm/drm_dp_helper.h>
30 #include <drm/i915_drm.h>
33 #define _INTEL_BIOS_PRIVATE
34 #include "intel_vbt_defs.h"
37 * DOC: Video BIOS Table (VBT)
39 * The Video BIOS Table, or VBT, provides platform and board specific
40 * configuration information to the driver that is not discoverable or available
41 * through other means. The configuration is mostly related to display
42 * hardware. The VBT is available via the ACPI OpRegion or, on older systems, in
45 * The VBT consists of a VBT Header (defined as &struct vbt_header), a BDB
46 * Header (&struct bdb_header), and a number of BIOS Data Blocks (BDB) that
47 * contain the actual configuration information. The VBT Header, and thus the
48 * VBT, begins with "$VBT" signature. The VBT Header contains the offset of the
49 * BDB Header. The data blocks are concatenated after the BDB Header. The data
50 * blocks have a 1-byte Block ID, 2-byte Block Size, and Block Size bytes of
51 * data. (Block 53, the MIPI Sequence Block is an exception.)
53 * The driver parses the VBT during load. The relevant information is stored in
54 * driver private data for ease of use, and the actual VBT is not read after
58 #define SLAVE_ADDR1 0x70
59 #define SLAVE_ADDR2 0x72
61 /* Get BDB block size given a pointer to Block ID. */
62 static u32 _get_blocksize(const u8 *block_base)
64 /* The MIPI Sequence Block v3+ has a separate size field. */
65 if (*block_base == BDB_MIPI_SEQUENCE && *(block_base + 3) >= 3)
66 return *((const u32 *)(block_base + 4));
68 return *((const u16 *)(block_base + 1));
71 /* Get BDB block size give a pointer to data after Block ID and Block Size. */
72 static u32 get_blocksize(const void *block_data)
74 return _get_blocksize((const char*)block_data - 3);
78 find_section(const void *_bdb, int section_id)
80 const struct bdb_header *bdb = _bdb;
81 const u8 *base = _bdb;
83 u32 total, current_size;
86 /* skip to first section */
87 index += bdb->header_size;
88 total = bdb->bdb_size;
90 /* walk the sections looking for section_id */
91 while (index + 3 < total) {
92 current_id = *(base + index);
93 current_size = _get_blocksize(base + index);
96 if (index + current_size > total)
99 if (current_id == section_id)
102 index += current_size;
109 fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
110 const struct lvds_dvo_timing *dvo_timing)
112 panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
113 dvo_timing->hactive_lo;
114 panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
115 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
116 panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
117 dvo_timing->hsync_pulse_width;
118 panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
119 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
121 panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
122 dvo_timing->vactive_lo;
123 panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
124 dvo_timing->vsync_off;
125 panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
126 dvo_timing->vsync_pulse_width;
127 panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
128 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
129 panel_fixed_mode->clock = dvo_timing->clock * 10;
130 panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
132 if (dvo_timing->hsync_positive)
133 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
135 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
137 if (dvo_timing->vsync_positive)
138 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
140 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
142 panel_fixed_mode->width_mm = (dvo_timing->himage_hi << 8) |
143 dvo_timing->himage_lo;
144 panel_fixed_mode->height_mm = (dvo_timing->vimage_hi << 8) |
145 dvo_timing->vimage_lo;
147 /* Some VBTs have bogus h/vtotal values */
148 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
149 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
150 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
151 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
153 drm_mode_set_name(panel_fixed_mode);
156 static const struct lvds_dvo_timing *
157 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
158 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs,
162 * the size of fp_timing varies on the different platform.
163 * So calculate the DVO timing relative offset in LVDS data
164 * entry to get the DVO timing entry
168 lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
169 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
170 int dvo_timing_offset =
171 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
172 lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
173 const char *entry = (const char *)lvds_lfp_data->data + lfp_data_size * index;
175 return (const struct lvds_dvo_timing *)(entry + dvo_timing_offset);
178 /* get lvds_fp_timing entry
179 * this function may return NULL if the corresponding entry is invalid
181 static const struct lvds_fp_timing *
182 get_lvds_fp_timing(const struct bdb_header *bdb,
183 const struct bdb_lvds_lfp_data *data,
184 const struct bdb_lvds_lfp_data_ptrs *ptrs,
187 size_t data_ofs = (const u8 *)data - (const u8 *)bdb;
188 u16 data_size = ((const u16 *)data)[-1]; /* stored in header */
191 if (index >= ARRAY_SIZE(ptrs->ptr))
193 ofs = ptrs->ptr[index].fp_timing_offset;
194 if (ofs < data_ofs ||
195 ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size)
197 return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs);
200 /* Try to find integrated panel data */
202 parse_lfp_panel_data(struct drm_i915_private *dev_priv,
203 const struct bdb_header *bdb)
205 const struct bdb_lvds_options *lvds_options;
206 const struct bdb_lvds_lfp_data *lvds_lfp_data;
207 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
208 const struct lvds_dvo_timing *panel_dvo_timing;
209 const struct lvds_fp_timing *fp_timing;
210 struct drm_display_mode *panel_fixed_mode;
215 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
219 dev_priv->vbt.lvds_dither = lvds_options->pixel_dither;
221 ret = intel_opregion_get_panel_type(dev_priv->dev);
225 DRM_DEBUG_KMS("Panel type: %d (OpRegion)\n", panel_type);
227 if (lvds_options->panel_type > 0xf) {
228 DRM_DEBUG_KMS("Invalid VBT panel type 0x%x\n",
229 lvds_options->panel_type);
232 panel_type = lvds_options->panel_type;
233 DRM_DEBUG_KMS("Panel type: %d (VBT)\n", panel_type);
236 dev_priv->vbt.panel_type = panel_type;
238 drrs_mode = (lvds_options->dps_panel_type_bits
239 >> (panel_type * 2)) & MODE_MASK;
241 * VBT has static DRRS = 0 and seamless DRRS = 2.
242 * The below piece of code is required to adjust vbt.drrs_type
243 * to match the enum drrs_support_type.
247 dev_priv->vbt.drrs_type = STATIC_DRRS_SUPPORT;
248 DRM_DEBUG_KMS("DRRS supported mode is static\n");
251 dev_priv->vbt.drrs_type = SEAMLESS_DRRS_SUPPORT;
252 DRM_DEBUG_KMS("DRRS supported mode is seamless\n");
255 dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
256 DRM_DEBUG_KMS("DRRS not supported (VBT input)\n");
260 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
264 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
265 if (!lvds_lfp_data_ptrs)
268 dev_priv->vbt.lvds_vbt = 1;
270 panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
274 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
275 if (!panel_fixed_mode)
278 fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);
280 dev_priv->vbt.lfp_lvds_vbt_mode = panel_fixed_mode;
282 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
283 drm_mode_debug_printmodeline(panel_fixed_mode);
285 fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data,
289 /* check the resolution, just to be sure */
290 if (fp_timing->x_res == panel_fixed_mode->hdisplay &&
291 fp_timing->y_res == panel_fixed_mode->vdisplay) {
292 dev_priv->vbt.bios_lvds_val = fp_timing->lvds_reg_val;
293 DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
294 dev_priv->vbt.bios_lvds_val);
300 parse_lfp_backlight(struct drm_i915_private *dev_priv,
301 const struct bdb_header *bdb)
303 const struct bdb_lfp_backlight_data *backlight_data;
304 const struct bdb_lfp_backlight_data_entry *entry;
305 int panel_type = dev_priv->vbt.panel_type;
307 backlight_data = find_section(bdb, BDB_LVDS_BACKLIGHT);
311 if (backlight_data->entry_size != sizeof(backlight_data->data[0])) {
312 DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n",
313 backlight_data->entry_size);
317 entry = &backlight_data->data[panel_type];
319 dev_priv->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM;
320 if (!dev_priv->vbt.backlight.present) {
321 DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n",
326 dev_priv->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz;
327 dev_priv->vbt.backlight.active_low_pwm = entry->active_low_pwm;
328 dev_priv->vbt.backlight.min_brightness = entry->min_brightness;
329 DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, "
330 "active %s, min brightness %u, level %u\n",
331 dev_priv->vbt.backlight.pwm_freq_hz,
332 dev_priv->vbt.backlight.active_low_pwm ? "low" : "high",
333 dev_priv->vbt.backlight.min_brightness,
334 backlight_data->level[panel_type]);
337 /* Try to find sdvo panel data */
339 parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
340 const struct bdb_header *bdb)
342 const struct lvds_dvo_timing *dvo_timing;
343 struct drm_display_mode *panel_fixed_mode;
346 index = i915.vbt_sdvo_panel_type;
348 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
353 const struct bdb_sdvo_lvds_options *sdvo_lvds_options;
355 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
356 if (!sdvo_lvds_options)
359 index = sdvo_lvds_options->panel_type;
362 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
366 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
367 if (!panel_fixed_mode)
370 fill_detail_timing_data(panel_fixed_mode, dvo_timing + index);
372 dev_priv->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode;
374 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
375 drm_mode_debug_printmodeline(panel_fixed_mode);
378 static int intel_bios_ssc_frequency(struct drm_i915_private *dev_priv,
381 switch (INTEL_INFO(dev_priv)->gen) {
383 return alternate ? 66667 : 48000;
386 return alternate ? 100000 : 96000;
388 return alternate ? 100000 : 120000;
393 parse_general_features(struct drm_i915_private *dev_priv,
394 const struct bdb_header *bdb)
396 const struct bdb_general_features *general;
398 general = find_section(bdb, BDB_GENERAL_FEATURES);
402 dev_priv->vbt.int_tv_support = general->int_tv_support;
403 /* int_crt_support can't be trusted on earlier platforms */
404 if (bdb->version >= 155 &&
405 (HAS_DDI(dev_priv) || IS_VALLEYVIEW(dev_priv)))
406 dev_priv->vbt.int_crt_support = general->int_crt_support;
407 dev_priv->vbt.lvds_use_ssc = general->enable_ssc;
408 dev_priv->vbt.lvds_ssc_freq =
409 intel_bios_ssc_frequency(dev_priv, general->ssc_freq);
410 dev_priv->vbt.display_clock_mode = general->display_clock_mode;
411 dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
412 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",
413 dev_priv->vbt.int_tv_support,
414 dev_priv->vbt.int_crt_support,
415 dev_priv->vbt.lvds_use_ssc,
416 dev_priv->vbt.lvds_ssc_freq,
417 dev_priv->vbt.display_clock_mode,
418 dev_priv->vbt.fdi_rx_polarity_inverted);
422 parse_general_definitions(struct drm_i915_private *dev_priv,
423 const struct bdb_header *bdb)
425 const struct bdb_general_definitions *general;
427 general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
429 u16 block_size = get_blocksize(general);
430 if (block_size >= sizeof(*general)) {
431 int bus_pin = general->crt_ddc_gmbus_pin;
432 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
433 if (intel_gmbus_is_valid_pin(dev_priv, bus_pin))
434 dev_priv->vbt.crt_ddc_pin = bus_pin;
436 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
442 static const union child_device_config *
443 child_device_ptr(const struct bdb_general_definitions *p_defs, int i)
445 return (const void *) &p_defs->devices[i * p_defs->child_dev_size];
449 parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
450 const struct bdb_header *bdb)
452 struct sdvo_device_mapping *p_mapping;
453 const struct bdb_general_definitions *p_defs;
454 const struct old_child_dev_config *child; /* legacy */
455 int i, child_device_num, count;
458 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
460 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
465 * Only parse SDVO mappings when the general definitions block child
466 * device size matches that of the *legacy* child device config
467 * struct. Thus, SDVO mapping will be skipped for newer VBT.
469 if (p_defs->child_dev_size != sizeof(*child)) {
470 DRM_DEBUG_KMS("Unsupported child device size for SDVO mapping.\n");
473 /* get the block size of general definitions */
474 block_size = get_blocksize(p_defs);
475 /* get the number of child device */
476 child_device_num = (block_size - sizeof(*p_defs)) /
477 p_defs->child_dev_size;
479 for (i = 0; i < child_device_num; i++) {
480 child = &child_device_ptr(p_defs, i)->old;
481 if (!child->device_type) {
482 /* skip the device block if device type is invalid */
485 if (child->slave_addr != SLAVE_ADDR1 &&
486 child->slave_addr != SLAVE_ADDR2) {
488 * If the slave address is neither 0x70 nor 0x72,
489 * it is not a SDVO device. Skip it.
493 if (child->dvo_port != DEVICE_PORT_DVOB &&
494 child->dvo_port != DEVICE_PORT_DVOC) {
495 /* skip the incorrect SDVO port */
496 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
499 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
502 (child->dvo_port == DEVICE_PORT_DVOB) ?
504 p_mapping = &dev_priv->vbt.sdvo_mappings[child->dvo_port - 1];
505 if (!p_mapping->initialized) {
506 p_mapping->dvo_port = child->dvo_port;
507 p_mapping->slave_addr = child->slave_addr;
508 p_mapping->dvo_wiring = child->dvo_wiring;
509 p_mapping->ddc_pin = child->ddc_pin;
510 p_mapping->i2c_pin = child->i2c_pin;
511 p_mapping->initialized = 1;
512 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
514 p_mapping->slave_addr,
515 p_mapping->dvo_wiring,
519 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
520 "two SDVO device.\n");
522 if (child->slave2_addr) {
523 /* Maybe this is a SDVO device with multiple inputs */
524 /* And the mapping info is not added */
525 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
526 " is a SDVO device with multiple inputs.\n");
532 /* No SDVO device info is found */
533 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
539 parse_driver_features(struct drm_i915_private *dev_priv,
540 const struct bdb_header *bdb)
542 const struct bdb_driver_features *driver;
544 driver = find_section(bdb, BDB_DRIVER_FEATURES);
548 if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
549 dev_priv->vbt.edp.support = 1;
551 DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver->drrs_enabled);
553 * If DRRS is not supported, drrs_type has to be set to 0.
554 * This is because, VBT is configured in such a way that
555 * static DRRS is 0 and DRRS not supported is represented by
556 * driver->drrs_enabled=false
558 if (!driver->drrs_enabled)
559 dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
563 parse_edp(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
565 const struct bdb_edp *edp;
566 const struct edp_power_seq *edp_pps;
567 const struct edp_link_params *edp_link_params;
568 int panel_type = dev_priv->vbt.panel_type;
570 edp = find_section(bdb, BDB_EDP);
572 if (dev_priv->vbt.edp.support)
573 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
577 switch ((edp->color_depth >> (panel_type * 2)) & 3) {
579 dev_priv->vbt.edp.bpp = 18;
582 dev_priv->vbt.edp.bpp = 24;
585 dev_priv->vbt.edp.bpp = 30;
589 /* Get the eDP sequencing and link info */
590 edp_pps = &edp->power_seqs[panel_type];
591 edp_link_params = &edp->link_params[panel_type];
593 dev_priv->vbt.edp.pps = *edp_pps;
595 switch (edp_link_params->rate) {
597 dev_priv->vbt.edp.rate = DP_LINK_BW_1_62;
600 dev_priv->vbt.edp.rate = DP_LINK_BW_2_7;
603 DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n",
604 edp_link_params->rate);
608 switch (edp_link_params->lanes) {
610 dev_priv->vbt.edp.lanes = 1;
613 dev_priv->vbt.edp.lanes = 2;
616 dev_priv->vbt.edp.lanes = 4;
619 DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n",
620 edp_link_params->lanes);
624 switch (edp_link_params->preemphasis) {
625 case EDP_PREEMPHASIS_NONE:
626 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_0;
628 case EDP_PREEMPHASIS_3_5dB:
629 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_1;
631 case EDP_PREEMPHASIS_6dB:
632 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_2;
634 case EDP_PREEMPHASIS_9_5dB:
635 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_3;
638 DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n",
639 edp_link_params->preemphasis);
643 switch (edp_link_params->vswing) {
644 case EDP_VSWING_0_4V:
645 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
647 case EDP_VSWING_0_6V:
648 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_1;
650 case EDP_VSWING_0_8V:
651 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
653 case EDP_VSWING_1_2V:
654 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
657 DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n",
658 edp_link_params->vswing);
662 if (bdb->version >= 173) {
665 /* Don't read from VBT if module parameter has valid value*/
666 if (i915.edp_vswing) {
667 dev_priv->vbt.edp.low_vswing = i915.edp_vswing == 1;
669 vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF;
670 dev_priv->vbt.edp.low_vswing = vswing == 0;
676 parse_psr(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
678 const struct bdb_psr *psr;
679 const struct psr_table *psr_table;
680 int panel_type = dev_priv->vbt.panel_type;
682 psr = find_section(bdb, BDB_PSR);
684 DRM_DEBUG_KMS("No PSR BDB found.\n");
688 psr_table = &psr->psr_table[panel_type];
690 dev_priv->vbt.psr.full_link = psr_table->full_link;
691 dev_priv->vbt.psr.require_aux_wakeup = psr_table->require_aux_to_wakeup;
693 /* Allowed VBT values goes from 0 to 15 */
694 dev_priv->vbt.psr.idle_frames = psr_table->idle_frames < 0 ? 0 :
695 psr_table->idle_frames > 15 ? 15 : psr_table->idle_frames;
697 switch (psr_table->lines_to_wait) {
699 dev_priv->vbt.psr.lines_to_wait = PSR_0_LINES_TO_WAIT;
702 dev_priv->vbt.psr.lines_to_wait = PSR_1_LINE_TO_WAIT;
705 dev_priv->vbt.psr.lines_to_wait = PSR_4_LINES_TO_WAIT;
708 dev_priv->vbt.psr.lines_to_wait = PSR_8_LINES_TO_WAIT;
711 DRM_DEBUG_KMS("VBT has unknown PSR lines to wait %u\n",
712 psr_table->lines_to_wait);
716 dev_priv->vbt.psr.tp1_wakeup_time = psr_table->tp1_wakeup_time;
717 dev_priv->vbt.psr.tp2_tp3_wakeup_time = psr_table->tp2_tp3_wakeup_time;
721 parse_mipi_config(struct drm_i915_private *dev_priv,
722 const struct bdb_header *bdb)
724 const struct bdb_mipi_config *start;
725 const struct mipi_config *config;
726 const struct mipi_pps_data *pps;
727 int panel_type = dev_priv->vbt.panel_type;
729 /* parse MIPI blocks only if LFP type is MIPI */
730 if (!intel_bios_is_dsi_present(dev_priv, NULL))
733 /* Initialize this to undefined indicating no generic MIPI support */
734 dev_priv->vbt.dsi.panel_id = MIPI_DSI_UNDEFINED_PANEL_ID;
736 /* Block #40 is already parsed and panel_fixed_mode is
737 * stored in dev_priv->lfp_lvds_vbt_mode
738 * resuse this when needed
741 /* Parse #52 for panel index used from panel_type already
744 start = find_section(bdb, BDB_MIPI_CONFIG);
746 DRM_DEBUG_KMS("No MIPI config BDB found");
750 DRM_DEBUG_DRIVER("Found MIPI Config block, panel index = %d\n",
754 * get hold of the correct configuration block and pps data as per
755 * the panel_type as index
757 config = &start->config[panel_type];
758 pps = &start->pps[panel_type];
760 /* store as of now full data. Trim when we realise all is not needed */
761 dev_priv->vbt.dsi.config = kmemdup(config, sizeof(struct mipi_config), GFP_KERNEL);
762 if (!dev_priv->vbt.dsi.config)
765 dev_priv->vbt.dsi.pps = kmemdup(pps, sizeof(struct mipi_pps_data), GFP_KERNEL);
766 if (!dev_priv->vbt.dsi.pps) {
767 kfree(dev_priv->vbt.dsi.config);
771 /* We have mandatory mipi config blocks. Initialize as generic panel */
772 dev_priv->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID;
775 /* Find the sequence block and size for the given panel. */
777 find_panel_sequence_block(const struct bdb_mipi_sequence *sequence,
778 u16 panel_id, u32 *seq_size)
780 u32 total = get_blocksize(sequence);
781 const u8 *data = &sequence->data[0];
784 int header_size = sequence->version >= 3 ? 5 : 3;
788 /* skip new block size */
789 if (sequence->version >= 3)
792 for (i = 0; i < MAX_MIPI_CONFIGURATIONS && index < total; i++) {
793 if (index + header_size > total) {
794 DRM_ERROR("Invalid sequence block (header)\n");
798 current_id = *(data + index);
799 if (sequence->version >= 3)
800 current_size = *((const u32 *)(data + index + 1));
802 current_size = *((const u16 *)(data + index + 1));
804 index += header_size;
806 if (index + current_size > total) {
807 DRM_ERROR("Invalid sequence block\n");
811 if (current_id == panel_id) {
812 *seq_size = current_size;
816 index += current_size;
819 DRM_ERROR("Sequence block detected but no valid configuration\n");
824 static int goto_next_sequence(const u8 *data, int index, int total)
828 /* Skip Sequence Byte. */
829 for (index = index + 1; index < total; index += len) {
830 u8 operation_byte = *(data + index);
833 switch (operation_byte) {
834 case MIPI_SEQ_ELEM_END:
836 case MIPI_SEQ_ELEM_SEND_PKT:
837 if (index + 4 > total)
840 len = *((const u16 *)(data + index + 2)) + 4;
842 case MIPI_SEQ_ELEM_DELAY:
845 case MIPI_SEQ_ELEM_GPIO:
848 case MIPI_SEQ_ELEM_I2C:
849 if (index + 7 > total)
851 len = *(data + index + 6) + 7;
854 DRM_ERROR("Unknown operation byte\n");
862 static int goto_next_sequence_v3(const u8 *data, int index, int total)
866 u32 size_of_sequence;
869 * Could skip sequence based on Size of Sequence alone, but also do some
870 * checking on the structure.
873 DRM_ERROR("Too small sequence size\n");
877 /* Skip Sequence Byte. */
881 * Size of Sequence. Excludes the Sequence Byte and the size itself,
882 * includes MIPI_SEQ_ELEM_END byte, excludes the final MIPI_SEQ_END
885 size_of_sequence = *((const uint32_t *)(data + index));
888 seq_end = index + size_of_sequence;
889 if (seq_end > total) {
890 DRM_ERROR("Invalid sequence size\n");
894 for (; index < total; index += len) {
895 u8 operation_byte = *(data + index);
898 if (operation_byte == MIPI_SEQ_ELEM_END) {
899 if (index != seq_end) {
900 DRM_ERROR("Invalid element structure\n");
906 len = *(data + index);
910 * FIXME: Would be nice to check elements like for v1/v2 in
911 * goto_next_sequence() above.
913 switch (operation_byte) {
914 case MIPI_SEQ_ELEM_SEND_PKT:
915 case MIPI_SEQ_ELEM_DELAY:
916 case MIPI_SEQ_ELEM_GPIO:
917 case MIPI_SEQ_ELEM_I2C:
918 case MIPI_SEQ_ELEM_SPI:
919 case MIPI_SEQ_ELEM_PMIC:
922 DRM_ERROR("Unknown operation byte %u\n",
932 parse_mipi_sequence(struct drm_i915_private *dev_priv,
933 const struct bdb_header *bdb)
935 int panel_type = dev_priv->vbt.panel_type;
936 const struct bdb_mipi_sequence *sequence;
942 /* Only our generic panel driver uses the sequence block. */
943 if (dev_priv->vbt.dsi.panel_id != MIPI_DSI_GENERIC_PANEL_ID)
946 sequence = find_section(bdb, BDB_MIPI_SEQUENCE);
948 DRM_DEBUG_KMS("No MIPI Sequence found, parsing complete\n");
952 /* Fail gracefully for forward incompatible sequence block. */
953 if (sequence->version >= 4) {
954 DRM_ERROR("Unable to parse MIPI Sequence Block v%u\n",
959 DRM_DEBUG_DRIVER("Found MIPI sequence block v%u\n", sequence->version);
961 seq_data = find_panel_sequence_block(sequence, panel_type, &seq_size);
965 data = kmemdup(seq_data, seq_size, GFP_KERNEL);
969 /* Parse the sequences, store pointers to each sequence. */
971 u8 seq_id = *(data + index);
972 if (seq_id == MIPI_SEQ_END)
975 if (seq_id >= MIPI_SEQ_MAX) {
976 DRM_ERROR("Unknown sequence %u\n", seq_id);
980 dev_priv->vbt.dsi.sequence[seq_id] = data + index;
982 if (sequence->version >= 3)
983 index = goto_next_sequence_v3(data, index, seq_size);
985 index = goto_next_sequence(data, index, seq_size);
987 DRM_ERROR("Invalid sequence %u\n", seq_id);
992 dev_priv->vbt.dsi.data = data;
993 dev_priv->vbt.dsi.size = seq_size;
994 dev_priv->vbt.dsi.seq_version = sequence->version;
996 DRM_DEBUG_DRIVER("MIPI related VBT parsing complete\n");
1001 memset(dev_priv->vbt.dsi.sequence, 0, sizeof(dev_priv->vbt.dsi.sequence));
1004 static u8 translate_iboost(u8 val)
1006 static const u8 mapping[] = { 1, 3, 7 }; /* See VBT spec */
1008 if (val >= ARRAY_SIZE(mapping)) {
1009 DRM_DEBUG_KMS("Unsupported I_boost value found in VBT (%d), display may not work properly\n", val);
1012 return mapping[val];
1015 static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
1016 const struct bdb_header *bdb)
1018 union child_device_config *it, *child = NULL;
1019 struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port];
1020 uint8_t hdmi_level_shift;
1022 bool is_dvi, is_hdmi, is_dp, is_edp, is_crt;
1023 uint8_t aux_channel, ddc_pin;
1024 /* Each DDI port can have more than one value on the "DVO Port" field,
1025 * so look for all the possible values for each port and abort if more
1026 * than one is found. */
1027 int dvo_ports[][3] = {
1028 {DVO_PORT_HDMIA, DVO_PORT_DPA, -1},
1029 {DVO_PORT_HDMIB, DVO_PORT_DPB, -1},
1030 {DVO_PORT_HDMIC, DVO_PORT_DPC, -1},
1031 {DVO_PORT_HDMID, DVO_PORT_DPD, -1},
1032 {DVO_PORT_CRT, DVO_PORT_HDMIE, DVO_PORT_DPE},
1035 /* Find the child device to use, abort if more than one found. */
1036 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1037 it = dev_priv->vbt.child_dev + i;
1039 for (j = 0; j < 3; j++) {
1040 if (dvo_ports[port][j] == -1)
1043 if (it->common.dvo_port == dvo_ports[port][j]) {
1045 DRM_DEBUG_KMS("More than one child device for port %c in VBT.\n",
1056 aux_channel = child->raw[25];
1057 ddc_pin = child->common.ddc_pin;
1059 is_dvi = child->common.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
1060 is_dp = child->common.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
1061 is_crt = child->common.device_type & DEVICE_TYPE_ANALOG_OUTPUT;
1062 is_hdmi = is_dvi && (child->common.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
1063 is_edp = is_dp && (child->common.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR);
1065 info->supports_dvi = is_dvi;
1066 info->supports_hdmi = is_hdmi;
1067 info->supports_dp = is_dp;
1069 DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n",
1070 port_name(port), is_dp, is_hdmi, is_dvi, is_edp, is_crt);
1072 if (is_edp && is_dvi)
1073 DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
1075 if (is_crt && port != PORT_E)
1076 DRM_DEBUG_KMS("Port %c is analog\n", port_name(port));
1077 if (is_crt && (is_dvi || is_dp))
1078 DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
1080 if (is_dvi && (port == PORT_A || port == PORT_E))
1081 DRM_DEBUG_KMS("Port %c is TMDS compatible\n", port_name(port));
1082 if (!is_dvi && !is_dp && !is_crt)
1083 DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
1085 if (is_edp && (port == PORT_B || port == PORT_C || port == PORT_E))
1086 DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port));
1089 if (port == PORT_E) {
1090 info->alternate_ddc_pin = ddc_pin;
1091 /* if DDIE share ddc pin with other port, then
1092 * dvi/hdmi couldn't exist on the shared port.
1093 * Otherwise they share the same ddc bin and system
1094 * couldn't communicate with them seperately. */
1095 if (ddc_pin == DDC_PIN_B) {
1096 dev_priv->vbt.ddi_port_info[PORT_B].supports_dvi = 0;
1097 dev_priv->vbt.ddi_port_info[PORT_B].supports_hdmi = 0;
1098 } else if (ddc_pin == DDC_PIN_C) {
1099 dev_priv->vbt.ddi_port_info[PORT_C].supports_dvi = 0;
1100 dev_priv->vbt.ddi_port_info[PORT_C].supports_hdmi = 0;
1101 } else if (ddc_pin == DDC_PIN_D) {
1102 dev_priv->vbt.ddi_port_info[PORT_D].supports_dvi = 0;
1103 dev_priv->vbt.ddi_port_info[PORT_D].supports_hdmi = 0;
1105 } else if (ddc_pin == DDC_PIN_B && port != PORT_B)
1106 DRM_DEBUG_KMS("Unexpected DDC pin for port B\n");
1107 else if (ddc_pin == DDC_PIN_C && port != PORT_C)
1108 DRM_DEBUG_KMS("Unexpected DDC pin for port C\n");
1109 else if (ddc_pin == DDC_PIN_D && port != PORT_D)
1110 DRM_DEBUG_KMS("Unexpected DDC pin for port D\n");
1114 if (port == PORT_E) {
1115 info->alternate_aux_channel = aux_channel;
1116 /* if DDIE share aux channel with other port, then
1117 * DP couldn't exist on the shared port. Otherwise
1118 * they share the same aux channel and system
1119 * couldn't communicate with them seperately. */
1120 if (aux_channel == DP_AUX_A)
1121 dev_priv->vbt.ddi_port_info[PORT_A].supports_dp = 0;
1122 else if (aux_channel == DP_AUX_B)
1123 dev_priv->vbt.ddi_port_info[PORT_B].supports_dp = 0;
1124 else if (aux_channel == DP_AUX_C)
1125 dev_priv->vbt.ddi_port_info[PORT_C].supports_dp = 0;
1126 else if (aux_channel == DP_AUX_D)
1127 dev_priv->vbt.ddi_port_info[PORT_D].supports_dp = 0;
1129 else if (aux_channel == DP_AUX_A && port != PORT_A)
1130 DRM_DEBUG_KMS("Unexpected AUX channel for port A\n");
1131 else if (aux_channel == DP_AUX_B && port != PORT_B)
1132 DRM_DEBUG_KMS("Unexpected AUX channel for port B\n");
1133 else if (aux_channel == DP_AUX_C && port != PORT_C)
1134 DRM_DEBUG_KMS("Unexpected AUX channel for port C\n");
1135 else if (aux_channel == DP_AUX_D && port != PORT_D)
1136 DRM_DEBUG_KMS("Unexpected AUX channel for port D\n");
1139 if (bdb->version >= 158) {
1140 /* The VBT HDMI level shift values match the table we have. */
1141 hdmi_level_shift = child->raw[7] & 0xF;
1142 DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
1145 info->hdmi_level_shift = hdmi_level_shift;
1148 /* Parse the I_boost config for SKL and above */
1149 if (bdb->version >= 196 && child->common.iboost) {
1150 info->dp_boost_level = translate_iboost(child->common.iboost_level & 0xF);
1151 DRM_DEBUG_KMS("VBT (e)DP boost level for port %c: %d\n",
1152 port_name(port), info->dp_boost_level);
1153 info->hdmi_boost_level = translate_iboost(child->common.iboost_level >> 4);
1154 DRM_DEBUG_KMS("VBT HDMI boost level for port %c: %d\n",
1155 port_name(port), info->hdmi_boost_level);
1159 static void parse_ddi_ports(struct drm_i915_private *dev_priv,
1160 const struct bdb_header *bdb)
1164 if (!HAS_DDI(dev_priv))
1167 if (!dev_priv->vbt.child_dev_num)
1170 if (bdb->version < 155)
1173 for (port = PORT_A; port < I915_MAX_PORTS; port++)
1174 parse_ddi_port(dev_priv, port, bdb);
1178 parse_device_mapping(struct drm_i915_private *dev_priv,
1179 const struct bdb_header *bdb)
1181 const struct bdb_general_definitions *p_defs;
1182 const union child_device_config *p_child;
1183 union child_device_config *child_dev_ptr;
1184 int i, child_device_num, count;
1188 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
1190 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
1193 if (bdb->version < 106) {
1195 } else if (bdb->version < 111) {
1197 } else if (bdb->version < 195) {
1198 BUILD_BUG_ON(sizeof(struct old_child_dev_config) != 33);
1199 expected_size = sizeof(struct old_child_dev_config);
1200 } else if (bdb->version == 195) {
1202 } else if (bdb->version <= 197) {
1206 BUILD_BUG_ON(sizeof(*p_child) < 38);
1207 DRM_DEBUG_DRIVER("Expected child device config size for VBT version %u not known; assuming %u\n",
1208 bdb->version, expected_size);
1211 /* Flag an error for unexpected size, but continue anyway. */
1212 if (p_defs->child_dev_size != expected_size)
1213 DRM_ERROR("Unexpected child device config size %u (expected %u for VBT version %u)\n",
1214 p_defs->child_dev_size, expected_size, bdb->version);
1216 /* The legacy sized child device config is the minimum we need. */
1217 if (p_defs->child_dev_size < sizeof(struct old_child_dev_config)) {
1218 DRM_DEBUG_KMS("Child device config size %u is too small.\n",
1219 p_defs->child_dev_size);
1223 /* get the block size of general definitions */
1224 block_size = get_blocksize(p_defs);
1225 /* get the number of child device */
1226 child_device_num = (block_size - sizeof(*p_defs)) /
1227 p_defs->child_dev_size;
1229 /* get the number of child device that is present */
1230 for (i = 0; i < child_device_num; i++) {
1231 p_child = child_device_ptr(p_defs, i);
1232 if (!p_child->common.device_type) {
1233 /* skip the device block if device type is invalid */
1239 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
1242 dev_priv->vbt.child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL);
1243 if (!dev_priv->vbt.child_dev) {
1244 DRM_DEBUG_KMS("No memory space for child device\n");
1248 dev_priv->vbt.child_dev_num = count;
1250 for (i = 0; i < child_device_num; i++) {
1251 p_child = child_device_ptr(p_defs, i);
1252 if (!p_child->common.device_type) {
1253 /* skip the device block if device type is invalid */
1257 child_dev_ptr = dev_priv->vbt.child_dev + count;
1261 * Copy as much as we know (sizeof) and is available
1262 * (child_dev_size) of the child device. Accessing the data must
1263 * depend on VBT version.
1265 memcpy(child_dev_ptr, p_child,
1266 min_t(size_t, p_defs->child_dev_size, sizeof(*p_child)));
1269 * copied full block, now init values when they are not
1270 * available in current version
1272 if (bdb->version < 196) {
1273 /* Set default values for bits added from v196 */
1274 child_dev_ptr->common.iboost = 0;
1275 child_dev_ptr->common.hpd_invert = 0;
1278 if (bdb->version < 192)
1279 child_dev_ptr->common.lspcon = 0;
1285 init_vbt_defaults(struct drm_i915_private *dev_priv)
1289 dev_priv->vbt.crt_ddc_pin = GMBUS_PIN_VGADDC;
1291 /* Default to having backlight */
1292 dev_priv->vbt.backlight.present = true;
1294 /* LFP panel data */
1295 dev_priv->vbt.lvds_dither = 1;
1296 dev_priv->vbt.lvds_vbt = 0;
1298 /* SDVO panel data */
1299 dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
1301 /* general features */
1302 dev_priv->vbt.int_tv_support = 1;
1303 dev_priv->vbt.int_crt_support = 1;
1305 /* Default to using SSC */
1306 dev_priv->vbt.lvds_use_ssc = 1;
1308 * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
1311 dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev_priv,
1312 !HAS_PCH_SPLIT(dev_priv));
1313 DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv->vbt.lvds_ssc_freq);
1315 for (port = PORT_A; port < I915_MAX_PORTS; port++) {
1316 struct ddi_vbt_port_info *info =
1317 &dev_priv->vbt.ddi_port_info[port];
1319 info->hdmi_level_shift = HDMI_LEVEL_SHIFT_UNKNOWN;
1321 info->supports_dvi = (port != PORT_A && port != PORT_E);
1322 info->supports_hdmi = info->supports_dvi;
1323 info->supports_dp = (port != PORT_E);
1327 static const struct bdb_header *get_bdb_header(const struct vbt_header *vbt)
1329 const char *_vbt = (const char *)vbt;
1331 return (const struct bdb_header *)(_vbt + vbt->bdb_offset);
1335 * intel_bios_is_valid_vbt - does the given buffer contain a valid VBT
1336 * @buf: pointer to a buffer to validate
1337 * @size: size of the buffer
1339 * Returns true on valid VBT.
1341 bool intel_bios_is_valid_vbt(const void *buf, size_t size)
1343 const struct vbt_header *vbt = buf;
1344 const struct bdb_header *bdb;
1349 if (sizeof(struct vbt_header) > size) {
1350 DRM_DEBUG_DRIVER("VBT header incomplete\n");
1354 if (memcmp(vbt->signature, "$VBT", 4)) {
1355 DRM_DEBUG_DRIVER("VBT invalid signature\n");
1359 if (vbt->bdb_offset + sizeof(struct bdb_header) > size) {
1360 DRM_DEBUG_DRIVER("BDB header incomplete\n");
1364 bdb = get_bdb_header(vbt);
1365 if (vbt->bdb_offset + bdb->bdb_size > size) {
1366 DRM_DEBUG_DRIVER("BDB incomplete\n");
1373 static const struct vbt_header *find_vbt(void __iomem *bios, size_t size)
1377 /* Scour memory looking for the VBT signature. */
1378 for (i = 0; i + 4 < size; i++) {
1381 if (ioread32(bios + i) != *((const u32 *) "$VBT"))
1385 * This is the one place where we explicitly discard the address
1386 * space (__iomem) of the BIOS/VBT.
1388 vbt = (char __force *) bios + i;
1389 if (intel_bios_is_valid_vbt(vbt, size - i))
1399 * intel_bios_init - find VBT and initialize settings from the BIOS
1400 * @dev_priv: i915 device instance
1402 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
1403 * to appropriate values.
1405 * Returns 0 on success, nonzero on failure.
1408 intel_bios_init(struct drm_i915_private *dev_priv)
1411 struct pci_dev *pdev = dev_priv->dev->pdev;
1413 const struct vbt_header *vbt = dev_priv->opregion.vbt;
1414 const struct bdb_header *bdb;
1415 u8 __iomem *bios = NULL;
1417 if (HAS_PCH_NOP(dev_priv))
1420 init_vbt_defaults(dev_priv);
1426 bios = pci_map_rom(pdev, &size);
1431 vbt = find_vbt(bios, size);
1434 pci_unmap_rom(pdev, bios);
1439 DRM_DEBUG_KMS("Found valid VBT in PCI ROM\n");
1442 bdb = get_bdb_header(vbt);
1444 DRM_DEBUG_KMS("VBT signature \"%.*s\", BDB version %d\n",
1445 (int)sizeof(vbt->signature), vbt->signature, bdb->version);
1447 /* Grab useful general definitions */
1448 parse_general_features(dev_priv, bdb);
1449 parse_general_definitions(dev_priv, bdb);
1450 parse_lfp_panel_data(dev_priv, bdb);
1451 parse_lfp_backlight(dev_priv, bdb);
1452 parse_sdvo_panel_data(dev_priv, bdb);
1453 parse_sdvo_device_mapping(dev_priv, bdb);
1454 parse_device_mapping(dev_priv, bdb);
1455 parse_driver_features(dev_priv, bdb);
1456 parse_edp(dev_priv, bdb);
1457 parse_psr(dev_priv, bdb);
1458 parse_mipi_config(dev_priv, bdb);
1459 parse_mipi_sequence(dev_priv, bdb);
1460 parse_ddi_ports(dev_priv, bdb);
1464 pci_unmap_rom(pdev, bios);
1471 * intel_bios_is_tv_present - is integrated TV present in VBT
1472 * @dev_priv: i915 device instance
1474 * Return true if TV is present. If no child devices were parsed from VBT,
1475 * assume TV is present.
1477 bool intel_bios_is_tv_present(struct drm_i915_private *dev_priv)
1479 union child_device_config *p_child;
1482 if (!dev_priv->vbt.int_tv_support)
1485 if (!dev_priv->vbt.child_dev_num)
1488 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1489 p_child = dev_priv->vbt.child_dev + i;
1491 * If the device type is not TV, continue.
1493 switch (p_child->old.device_type) {
1494 case DEVICE_TYPE_INT_TV:
1495 case DEVICE_TYPE_TV:
1496 case DEVICE_TYPE_TV_SVIDEO_COMPOSITE:
1501 /* Only when the addin_offset is non-zero, it is regarded
1504 if (p_child->old.addin_offset)
1512 * intel_bios_is_lvds_present - is LVDS present in VBT
1513 * @dev_priv: i915 device instance
1514 * @i2c_pin: i2c pin for LVDS if present
1516 * Return true if LVDS is present. If no child devices were parsed from VBT,
1517 * assume LVDS is present.
1519 bool intel_bios_is_lvds_present(struct drm_i915_private *dev_priv, u8 *i2c_pin)
1523 if (!dev_priv->vbt.child_dev_num)
1526 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1527 union child_device_config *uchild = dev_priv->vbt.child_dev + i;
1528 struct old_child_dev_config *child = &uchild->old;
1530 /* If the device type is not LFP, continue.
1531 * We have to check both the new identifiers as well as the
1532 * old for compatibility with some BIOSes.
1534 if (child->device_type != DEVICE_TYPE_INT_LFP &&
1535 child->device_type != DEVICE_TYPE_LFP)
1538 if (intel_gmbus_is_valid_pin(dev_priv, child->i2c_pin))
1539 *i2c_pin = child->i2c_pin;
1541 /* However, we cannot trust the BIOS writers to populate
1542 * the VBT correctly. Since LVDS requires additional
1543 * information from AIM blocks, a non-zero addin offset is
1544 * a good indicator that the LVDS is actually present.
1546 if (child->addin_offset)
1549 /* But even then some BIOS writers perform some black magic
1550 * and instantiate the device without reference to any
1551 * additional data. Trust that if the VBT was written into
1552 * the OpRegion then they have validated the LVDS's existence.
1554 if (dev_priv->opregion.vbt)
1562 * intel_bios_is_port_present - is the specified digital port present
1563 * @dev_priv: i915 device instance
1564 * @port: port to check
1566 * Return true if the device in %port is present.
1568 bool intel_bios_is_port_present(struct drm_i915_private *dev_priv, enum port port)
1570 static const struct {
1572 } port_mapping[] = {
1573 [PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, },
1574 [PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, },
1575 [PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, },
1576 [PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, },
1580 /* FIXME maybe deal with port A as well? */
1581 if (WARN_ON(port == PORT_A) || port >= ARRAY_SIZE(port_mapping))
1584 if (!dev_priv->vbt.child_dev_num)
1587 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1588 const union child_device_config *p_child =
1589 &dev_priv->vbt.child_dev[i];
1590 if ((p_child->common.dvo_port == port_mapping[port].dp ||
1591 p_child->common.dvo_port == port_mapping[port].hdmi) &&
1592 (p_child->common.device_type & (DEVICE_TYPE_TMDS_DVI_SIGNALING |
1593 DEVICE_TYPE_DISPLAYPORT_OUTPUT)))
1601 * intel_bios_is_port_edp - is the device in given port eDP
1602 * @dev_priv: i915 device instance
1603 * @port: port to check
1605 * Return true if the device in %port is eDP.
1607 bool intel_bios_is_port_edp(struct drm_i915_private *dev_priv, enum port port)
1609 union child_device_config *p_child;
1610 static const short port_mapping[] = {
1611 [PORT_B] = DVO_PORT_DPB,
1612 [PORT_C] = DVO_PORT_DPC,
1613 [PORT_D] = DVO_PORT_DPD,
1614 [PORT_E] = DVO_PORT_DPE,
1618 if (!dev_priv->vbt.child_dev_num)
1621 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1622 p_child = dev_priv->vbt.child_dev + i;
1624 if (p_child->common.dvo_port == port_mapping[port] &&
1625 (p_child->common.device_type & DEVICE_TYPE_eDP_BITS) ==
1626 (DEVICE_TYPE_eDP & DEVICE_TYPE_eDP_BITS))
1633 bool intel_bios_is_port_dp_dual_mode(struct drm_i915_private *dev_priv, enum port port)
1635 static const struct {
1637 } port_mapping[] = {
1639 * Buggy VBTs may declare DP ports as having
1640 * HDMI type dvo_port :( So let's check both.
1642 [PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, },
1643 [PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, },
1644 [PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, },
1645 [PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, },
1649 if (port == PORT_A || port >= ARRAY_SIZE(port_mapping))
1652 if (!dev_priv->vbt.child_dev_num)
1655 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1656 const union child_device_config *p_child =
1657 &dev_priv->vbt.child_dev[i];
1659 if ((p_child->common.dvo_port == port_mapping[port].dp ||
1660 p_child->common.dvo_port == port_mapping[port].hdmi) &&
1661 (p_child->common.device_type & DEVICE_TYPE_DP_DUAL_MODE_BITS) ==
1662 (DEVICE_TYPE_DP_DUAL_MODE & DEVICE_TYPE_DP_DUAL_MODE_BITS))
1670 * intel_bios_is_dsi_present - is DSI present in VBT
1671 * @dev_priv: i915 device instance
1672 * @port: port for DSI if present
1674 * Return true if DSI is present, and return the port in %port.
1676 bool intel_bios_is_dsi_present(struct drm_i915_private *dev_priv,
1679 union child_device_config *p_child;
1683 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1684 p_child = dev_priv->vbt.child_dev + i;
1686 if (!(p_child->common.device_type & DEVICE_TYPE_MIPI_OUTPUT))
1689 dvo_port = p_child->common.dvo_port;
1692 case DVO_PORT_MIPIA:
1693 case DVO_PORT_MIPIC:
1695 *port = dvo_port - DVO_PORT_MIPIA;
1697 case DVO_PORT_MIPIB:
1698 case DVO_PORT_MIPID:
1699 DRM_DEBUG_KMS("VBT has unsupported DSI port %c\n",
1700 port_name(dvo_port - DVO_PORT_MIPIA));
1709 * intel_bios_is_port_hpd_inverted - is HPD inverted for %port
1710 * @dev_priv: i915 device instance
1711 * @port: port to check
1713 * Return true if HPD should be inverted for %port.
1716 intel_bios_is_port_hpd_inverted(struct drm_i915_private *dev_priv,
1721 if (WARN_ON_ONCE(!IS_BROXTON(dev_priv)))
1724 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1725 if (!dev_priv->vbt.child_dev[i].common.hpd_invert)
1728 switch (dev_priv->vbt.child_dev[i].common.dvo_port) {
1730 case DVO_PORT_HDMIA:
1735 case DVO_PORT_HDMIB:
1740 case DVO_PORT_HDMIC: