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(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_hi << 8) |
118 dvo_timing->hsync_pulse_width_lo);
119 panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
120 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
122 panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
123 dvo_timing->vactive_lo;
124 panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
125 ((dvo_timing->vsync_off_hi << 4) | dvo_timing->vsync_off_lo);
126 panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
127 ((dvo_timing->vsync_pulse_width_hi << 4) |
128 dvo_timing->vsync_pulse_width_lo);
129 panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
130 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
131 panel_fixed_mode->clock = dvo_timing->clock * 10;
132 panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
134 if (dvo_timing->hsync_positive)
135 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
137 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
139 if (dvo_timing->vsync_positive)
140 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
142 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
144 panel_fixed_mode->width_mm = (dvo_timing->himage_hi << 8) |
145 dvo_timing->himage_lo;
146 panel_fixed_mode->height_mm = (dvo_timing->vimage_hi << 8) |
147 dvo_timing->vimage_lo;
149 /* Some VBTs have bogus h/vtotal values */
150 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
151 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
152 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
153 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
155 drm_mode_set_name(panel_fixed_mode);
158 static const struct lvds_dvo_timing *
159 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
160 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs,
164 * the size of fp_timing varies on the different platform.
165 * So calculate the DVO timing relative offset in LVDS data
166 * entry to get the DVO timing entry
170 lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
171 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
172 int dvo_timing_offset =
173 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
174 lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
175 char *entry = (char *)lvds_lfp_data->data + lfp_data_size * index;
177 return (struct lvds_dvo_timing *)(entry + dvo_timing_offset);
180 /* get lvds_fp_timing entry
181 * this function may return NULL if the corresponding entry is invalid
183 static const struct lvds_fp_timing *
184 get_lvds_fp_timing(const struct bdb_header *bdb,
185 const struct bdb_lvds_lfp_data *data,
186 const struct bdb_lvds_lfp_data_ptrs *ptrs,
189 size_t data_ofs = (const u8 *)data - (const u8 *)bdb;
190 u16 data_size = ((const u16 *)data)[-1]; /* stored in header */
193 if (index >= ARRAY_SIZE(ptrs->ptr))
195 ofs = ptrs->ptr[index].fp_timing_offset;
196 if (ofs < data_ofs ||
197 ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size)
199 return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs);
202 /* Try to find integrated panel data */
204 parse_lfp_panel_data(struct drm_i915_private *dev_priv,
205 const struct bdb_header *bdb)
207 const struct bdb_lvds_options *lvds_options;
208 const struct bdb_lvds_lfp_data *lvds_lfp_data;
209 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
210 const struct lvds_dvo_timing *panel_dvo_timing;
211 const struct lvds_fp_timing *fp_timing;
212 struct drm_display_mode *panel_fixed_mode;
217 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
221 dev_priv->vbt.lvds_dither = lvds_options->pixel_dither;
223 ret = intel_opregion_get_panel_type(dev_priv);
227 DRM_DEBUG_KMS("Panel type: %d (OpRegion)\n", panel_type);
229 if (lvds_options->panel_type > 0xf) {
230 DRM_DEBUG_KMS("Invalid VBT panel type 0x%x\n",
231 lvds_options->panel_type);
234 panel_type = lvds_options->panel_type;
235 DRM_DEBUG_KMS("Panel type: %d (VBT)\n", panel_type);
238 dev_priv->vbt.panel_type = panel_type;
240 drrs_mode = (lvds_options->dps_panel_type_bits
241 >> (panel_type * 2)) & MODE_MASK;
243 * VBT has static DRRS = 0 and seamless DRRS = 2.
244 * The below piece of code is required to adjust vbt.drrs_type
245 * to match the enum drrs_support_type.
249 dev_priv->vbt.drrs_type = STATIC_DRRS_SUPPORT;
250 DRM_DEBUG_KMS("DRRS supported mode is static\n");
253 dev_priv->vbt.drrs_type = SEAMLESS_DRRS_SUPPORT;
254 DRM_DEBUG_KMS("DRRS supported mode is seamless\n");
257 dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
258 DRM_DEBUG_KMS("DRRS not supported (VBT input)\n");
262 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
266 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
267 if (!lvds_lfp_data_ptrs)
270 dev_priv->vbt.lvds_vbt = 1;
272 panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
276 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
277 if (!panel_fixed_mode)
280 fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);
282 dev_priv->vbt.lfp_lvds_vbt_mode = panel_fixed_mode;
284 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
285 drm_mode_debug_printmodeline(panel_fixed_mode);
287 fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data,
291 /* check the resolution, just to be sure */
292 if (fp_timing->x_res == panel_fixed_mode->hdisplay &&
293 fp_timing->y_res == panel_fixed_mode->vdisplay) {
294 dev_priv->vbt.bios_lvds_val = fp_timing->lvds_reg_val;
295 DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
296 dev_priv->vbt.bios_lvds_val);
302 parse_lfp_backlight(struct drm_i915_private *dev_priv,
303 const struct bdb_header *bdb)
305 const struct bdb_lfp_backlight_data *backlight_data;
306 const struct bdb_lfp_backlight_data_entry *entry;
307 int panel_type = dev_priv->vbt.panel_type;
309 backlight_data = find_section(bdb, BDB_LVDS_BACKLIGHT);
313 if (backlight_data->entry_size != sizeof(backlight_data->data[0])) {
314 DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n",
315 backlight_data->entry_size);
319 entry = &backlight_data->data[panel_type];
321 dev_priv->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM;
322 if (!dev_priv->vbt.backlight.present) {
323 DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n",
328 dev_priv->vbt.backlight.type = INTEL_BACKLIGHT_DISPLAY_DDI;
329 if (bdb->version >= 191 &&
330 get_blocksize(backlight_data) >= sizeof(*backlight_data)) {
331 const struct bdb_lfp_backlight_control_method *method;
333 method = &backlight_data->backlight_control[panel_type];
334 dev_priv->vbt.backlight.type = method->type;
335 dev_priv->vbt.backlight.controller = method->controller;
338 dev_priv->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz;
339 dev_priv->vbt.backlight.active_low_pwm = entry->active_low_pwm;
340 dev_priv->vbt.backlight.min_brightness = entry->min_brightness;
341 DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, "
342 "active %s, min brightness %u, level %u, controller %u\n",
343 dev_priv->vbt.backlight.pwm_freq_hz,
344 dev_priv->vbt.backlight.active_low_pwm ? "low" : "high",
345 dev_priv->vbt.backlight.min_brightness,
346 backlight_data->level[panel_type],
347 dev_priv->vbt.backlight.controller);
350 /* Try to find sdvo panel data */
352 parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
353 const struct bdb_header *bdb)
355 const struct lvds_dvo_timing *dvo_timing;
356 struct drm_display_mode *panel_fixed_mode;
359 index = i915.vbt_sdvo_panel_type;
361 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
366 const struct bdb_sdvo_lvds_options *sdvo_lvds_options;
368 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
369 if (!sdvo_lvds_options)
372 index = sdvo_lvds_options->panel_type;
375 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
379 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
380 if (!panel_fixed_mode)
383 fill_detail_timing_data(panel_fixed_mode, dvo_timing + index);
385 dev_priv->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode;
387 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
388 drm_mode_debug_printmodeline(panel_fixed_mode);
391 static int intel_bios_ssc_frequency(struct drm_i915_private *dev_priv,
394 switch (INTEL_INFO(dev_priv)->gen) {
396 return alternate ? 66667 : 48000;
399 return alternate ? 100000 : 96000;
401 return alternate ? 100000 : 120000;
406 parse_general_features(struct drm_i915_private *dev_priv,
407 const struct bdb_header *bdb)
409 const struct bdb_general_features *general;
411 general = find_section(bdb, BDB_GENERAL_FEATURES);
415 dev_priv->vbt.int_tv_support = general->int_tv_support;
416 /* int_crt_support can't be trusted on earlier platforms */
417 if (bdb->version >= 155 &&
418 (HAS_DDI(dev_priv) || IS_VALLEYVIEW(dev_priv)))
419 dev_priv->vbt.int_crt_support = general->int_crt_support;
420 dev_priv->vbt.lvds_use_ssc = general->enable_ssc;
421 dev_priv->vbt.lvds_ssc_freq =
422 intel_bios_ssc_frequency(dev_priv, general->ssc_freq);
423 dev_priv->vbt.display_clock_mode = general->display_clock_mode;
424 dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
425 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",
426 dev_priv->vbt.int_tv_support,
427 dev_priv->vbt.int_crt_support,
428 dev_priv->vbt.lvds_use_ssc,
429 dev_priv->vbt.lvds_ssc_freq,
430 dev_priv->vbt.display_clock_mode,
431 dev_priv->vbt.fdi_rx_polarity_inverted);
435 parse_general_definitions(struct drm_i915_private *dev_priv,
436 const struct bdb_header *bdb)
438 const struct bdb_general_definitions *general;
440 general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
442 u16 block_size = get_blocksize(general);
443 if (block_size >= sizeof(*general)) {
444 int bus_pin = general->crt_ddc_gmbus_pin;
445 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
446 if (intel_gmbus_is_valid_pin(dev_priv, bus_pin))
447 dev_priv->vbt.crt_ddc_pin = bus_pin;
449 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
455 static const union child_device_config *
456 child_device_ptr(const struct bdb_general_definitions *p_defs, int i)
458 return (const void *) &p_defs->devices[i * p_defs->child_dev_size];
462 parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
463 const struct bdb_header *bdb)
465 struct sdvo_device_mapping *p_mapping;
466 const struct bdb_general_definitions *p_defs;
467 const struct old_child_dev_config *child; /* legacy */
468 int i, child_device_num, count;
471 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
473 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
478 * Only parse SDVO mappings when the general definitions block child
479 * device size matches that of the *legacy* child device config
480 * struct. Thus, SDVO mapping will be skipped for newer VBT.
482 if (p_defs->child_dev_size != sizeof(*child)) {
483 DRM_DEBUG_KMS("Unsupported child device size for SDVO mapping.\n");
486 /* get the block size of general definitions */
487 block_size = get_blocksize(p_defs);
488 /* get the number of child device */
489 child_device_num = (block_size - sizeof(*p_defs)) /
490 p_defs->child_dev_size;
492 for (i = 0; i < child_device_num; i++) {
493 child = &child_device_ptr(p_defs, i)->old;
494 if (!child->device_type) {
495 /* skip the device block if device type is invalid */
498 if (child->slave_addr != SLAVE_ADDR1 &&
499 child->slave_addr != SLAVE_ADDR2) {
501 * If the slave address is neither 0x70 nor 0x72,
502 * it is not a SDVO device. Skip it.
506 if (child->dvo_port != DEVICE_PORT_DVOB &&
507 child->dvo_port != DEVICE_PORT_DVOC) {
508 /* skip the incorrect SDVO port */
509 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
512 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
515 (child->dvo_port == DEVICE_PORT_DVOB) ?
517 p_mapping = &dev_priv->vbt.sdvo_mappings[child->dvo_port - 1];
518 if (!p_mapping->initialized) {
519 p_mapping->dvo_port = child->dvo_port;
520 p_mapping->slave_addr = child->slave_addr;
521 p_mapping->dvo_wiring = child->dvo_wiring;
522 p_mapping->ddc_pin = child->ddc_pin;
523 p_mapping->i2c_pin = child->i2c_pin;
524 p_mapping->initialized = 1;
525 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
527 p_mapping->slave_addr,
528 p_mapping->dvo_wiring,
532 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
533 "two SDVO device.\n");
535 if (child->slave2_addr) {
536 /* Maybe this is a SDVO device with multiple inputs */
537 /* And the mapping info is not added */
538 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
539 " is a SDVO device with multiple inputs.\n");
545 /* No SDVO device info is found */
546 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
552 parse_driver_features(struct drm_i915_private *dev_priv,
553 const struct bdb_header *bdb)
555 const struct bdb_driver_features *driver;
557 driver = find_section(bdb, BDB_DRIVER_FEATURES);
561 if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
562 dev_priv->vbt.edp.support = 1;
564 DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver->drrs_enabled);
566 * If DRRS is not supported, drrs_type has to be set to 0.
567 * This is because, VBT is configured in such a way that
568 * static DRRS is 0 and DRRS not supported is represented by
569 * driver->drrs_enabled=false
571 if (!driver->drrs_enabled)
572 dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
576 parse_edp(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
578 const struct bdb_edp *edp;
579 const struct edp_power_seq *edp_pps;
580 const struct edp_link_params *edp_link_params;
581 int panel_type = dev_priv->vbt.panel_type;
583 edp = find_section(bdb, BDB_EDP);
585 if (dev_priv->vbt.edp.support)
586 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
590 switch ((edp->color_depth >> (panel_type * 2)) & 3) {
592 dev_priv->vbt.edp.bpp = 18;
595 dev_priv->vbt.edp.bpp = 24;
598 dev_priv->vbt.edp.bpp = 30;
602 /* Get the eDP sequencing and link info */
603 edp_pps = &edp->power_seqs[panel_type];
604 edp_link_params = &edp->link_params[panel_type];
606 dev_priv->vbt.edp.pps = *edp_pps;
608 switch (edp_link_params->rate) {
610 dev_priv->vbt.edp.rate = DP_LINK_BW_1_62;
613 dev_priv->vbt.edp.rate = DP_LINK_BW_2_7;
616 DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n",
617 edp_link_params->rate);
621 switch (edp_link_params->lanes) {
623 dev_priv->vbt.edp.lanes = 1;
626 dev_priv->vbt.edp.lanes = 2;
629 dev_priv->vbt.edp.lanes = 4;
632 DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n",
633 edp_link_params->lanes);
637 switch (edp_link_params->preemphasis) {
638 case EDP_PREEMPHASIS_NONE:
639 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_0;
641 case EDP_PREEMPHASIS_3_5dB:
642 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_1;
644 case EDP_PREEMPHASIS_6dB:
645 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_2;
647 case EDP_PREEMPHASIS_9_5dB:
648 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_3;
651 DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n",
652 edp_link_params->preemphasis);
656 switch (edp_link_params->vswing) {
657 case EDP_VSWING_0_4V:
658 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
660 case EDP_VSWING_0_6V:
661 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_1;
663 case EDP_VSWING_0_8V:
664 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
666 case EDP_VSWING_1_2V:
667 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
670 DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n",
671 edp_link_params->vswing);
675 if (bdb->version >= 173) {
678 /* Don't read from VBT if module parameter has valid value*/
679 if (i915.edp_vswing) {
680 dev_priv->vbt.edp.low_vswing = i915.edp_vswing == 1;
682 vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF;
683 dev_priv->vbt.edp.low_vswing = vswing == 0;
689 parse_psr(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
691 const struct bdb_psr *psr;
692 const struct psr_table *psr_table;
693 int panel_type = dev_priv->vbt.panel_type;
695 psr = find_section(bdb, BDB_PSR);
697 DRM_DEBUG_KMS("No PSR BDB found.\n");
701 psr_table = &psr->psr_table[panel_type];
703 dev_priv->vbt.psr.full_link = psr_table->full_link;
704 dev_priv->vbt.psr.require_aux_wakeup = psr_table->require_aux_to_wakeup;
706 /* Allowed VBT values goes from 0 to 15 */
707 dev_priv->vbt.psr.idle_frames = psr_table->idle_frames < 0 ? 0 :
708 psr_table->idle_frames > 15 ? 15 : psr_table->idle_frames;
710 switch (psr_table->lines_to_wait) {
712 dev_priv->vbt.psr.lines_to_wait = PSR_0_LINES_TO_WAIT;
715 dev_priv->vbt.psr.lines_to_wait = PSR_1_LINE_TO_WAIT;
718 dev_priv->vbt.psr.lines_to_wait = PSR_4_LINES_TO_WAIT;
721 dev_priv->vbt.psr.lines_to_wait = PSR_8_LINES_TO_WAIT;
724 DRM_DEBUG_KMS("VBT has unknown PSR lines to wait %u\n",
725 psr_table->lines_to_wait);
729 dev_priv->vbt.psr.tp1_wakeup_time = psr_table->tp1_wakeup_time;
730 dev_priv->vbt.psr.tp2_tp3_wakeup_time = psr_table->tp2_tp3_wakeup_time;
734 parse_mipi_config(struct drm_i915_private *dev_priv,
735 const struct bdb_header *bdb)
737 const struct bdb_mipi_config *start;
738 const struct mipi_config *config;
739 const struct mipi_pps_data *pps;
740 int panel_type = dev_priv->vbt.panel_type;
742 /* parse MIPI blocks only if LFP type is MIPI */
743 if (!intel_bios_is_dsi_present(dev_priv, NULL))
746 /* Initialize this to undefined indicating no generic MIPI support */
747 dev_priv->vbt.dsi.panel_id = MIPI_DSI_UNDEFINED_PANEL_ID;
749 /* Block #40 is already parsed and panel_fixed_mode is
750 * stored in dev_priv->lfp_lvds_vbt_mode
751 * resuse this when needed
754 /* Parse #52 for panel index used from panel_type already
757 start = find_section(bdb, BDB_MIPI_CONFIG);
759 DRM_DEBUG_KMS("No MIPI config BDB found");
763 DRM_DEBUG_DRIVER("Found MIPI Config block, panel index = %d\n",
767 * get hold of the correct configuration block and pps data as per
768 * the panel_type as index
770 config = &start->config[panel_type];
771 pps = &start->pps[panel_type];
773 /* store as of now full data. Trim when we realise all is not needed */
774 dev_priv->vbt.dsi.config = kmemdup(config, sizeof(struct mipi_config), GFP_KERNEL);
775 if (!dev_priv->vbt.dsi.config)
778 dev_priv->vbt.dsi.pps = kmemdup(pps, sizeof(struct mipi_pps_data), GFP_KERNEL);
779 if (!dev_priv->vbt.dsi.pps) {
780 kfree(dev_priv->vbt.dsi.config);
785 * These fields are introduced from the VBT version 197 onwards,
786 * so making sure that these bits are set zero in the previous
789 if (dev_priv->vbt.dsi.config->dual_link && bdb->version < 197) {
790 dev_priv->vbt.dsi.config->dl_dcs_cabc_ports = 0;
791 dev_priv->vbt.dsi.config->dl_dcs_backlight_ports = 0;
794 /* We have mandatory mipi config blocks. Initialize as generic panel */
795 dev_priv->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID;
798 /* Find the sequence block and size for the given panel. */
800 find_panel_sequence_block(const struct bdb_mipi_sequence *sequence,
801 u16 panel_id, u32 *seq_size)
803 u32 total = get_blocksize(sequence);
804 const u8 *data = &sequence->data[0];
807 int header_size = sequence->version >= 3 ? 5 : 3;
811 /* skip new block size */
812 if (sequence->version >= 3)
815 for (i = 0; i < MAX_MIPI_CONFIGURATIONS && index < total; i++) {
816 if (index + header_size > total) {
817 DRM_ERROR("Invalid sequence block (header)\n");
821 current_id = *(data + index);
822 if (sequence->version >= 3)
823 current_size = *((const u32 *)(data + index + 1));
825 current_size = *((const u16 *)(data + index + 1));
827 index += header_size;
829 if (index + current_size > total) {
830 DRM_ERROR("Invalid sequence block\n");
834 if (current_id == panel_id) {
835 *seq_size = current_size;
839 index += current_size;
842 DRM_ERROR("Sequence block detected but no valid configuration\n");
847 static int goto_next_sequence(const u8 *data, int index, int total)
851 /* Skip Sequence Byte. */
852 for (index = index + 1; index < total; index += len) {
853 u8 operation_byte = *(data + index);
856 switch (operation_byte) {
857 case MIPI_SEQ_ELEM_END:
859 case MIPI_SEQ_ELEM_SEND_PKT:
860 if (index + 4 > total)
863 len = *((const u16 *)(data + index + 2)) + 4;
865 case MIPI_SEQ_ELEM_DELAY:
868 case MIPI_SEQ_ELEM_GPIO:
871 case MIPI_SEQ_ELEM_I2C:
872 if (index + 7 > total)
874 len = *(data + index + 6) + 7;
877 DRM_ERROR("Unknown operation byte\n");
885 static int goto_next_sequence_v3(const u8 *data, int index, int total)
889 u32 size_of_sequence;
892 * Could skip sequence based on Size of Sequence alone, but also do some
893 * checking on the structure.
896 DRM_ERROR("Too small sequence size\n");
900 /* Skip Sequence Byte. */
904 * Size of Sequence. Excludes the Sequence Byte and the size itself,
905 * includes MIPI_SEQ_ELEM_END byte, excludes the final MIPI_SEQ_END
908 size_of_sequence = *((const uint32_t *)(data + index));
911 seq_end = index + size_of_sequence;
912 if (seq_end > total) {
913 DRM_ERROR("Invalid sequence size\n");
917 for (; index < total; index += len) {
918 u8 operation_byte = *(data + index);
921 if (operation_byte == MIPI_SEQ_ELEM_END) {
922 if (index != seq_end) {
923 DRM_ERROR("Invalid element structure\n");
929 len = *(data + index);
933 * FIXME: Would be nice to check elements like for v1/v2 in
934 * goto_next_sequence() above.
936 switch (operation_byte) {
937 case MIPI_SEQ_ELEM_SEND_PKT:
938 case MIPI_SEQ_ELEM_DELAY:
939 case MIPI_SEQ_ELEM_GPIO:
940 case MIPI_SEQ_ELEM_I2C:
941 case MIPI_SEQ_ELEM_SPI:
942 case MIPI_SEQ_ELEM_PMIC:
945 DRM_ERROR("Unknown operation byte %u\n",
955 parse_mipi_sequence(struct drm_i915_private *dev_priv,
956 const struct bdb_header *bdb)
958 int panel_type = dev_priv->vbt.panel_type;
959 const struct bdb_mipi_sequence *sequence;
965 /* Only our generic panel driver uses the sequence block. */
966 if (dev_priv->vbt.dsi.panel_id != MIPI_DSI_GENERIC_PANEL_ID)
969 sequence = find_section(bdb, BDB_MIPI_SEQUENCE);
971 DRM_DEBUG_KMS("No MIPI Sequence found, parsing complete\n");
975 /* Fail gracefully for forward incompatible sequence block. */
976 if (sequence->version >= 4) {
977 DRM_ERROR("Unable to parse MIPI Sequence Block v%u\n",
982 DRM_DEBUG_DRIVER("Found MIPI sequence block v%u\n", sequence->version);
984 seq_data = find_panel_sequence_block(sequence, panel_type, &seq_size);
988 data = kmemdup(seq_data, seq_size, GFP_KERNEL);
992 /* Parse the sequences, store pointers to each sequence. */
994 u8 seq_id = *(data + index);
995 if (seq_id == MIPI_SEQ_END)
998 if (seq_id >= MIPI_SEQ_MAX) {
999 DRM_ERROR("Unknown sequence %u\n", seq_id);
1003 /* Log about presence of sequences we won't run. */
1004 if (seq_id == MIPI_SEQ_TEAR_ON || seq_id == MIPI_SEQ_TEAR_OFF)
1005 DRM_DEBUG_KMS("Unsupported sequence %u\n", seq_id);
1007 dev_priv->vbt.dsi.sequence[seq_id] = data + index;
1009 if (sequence->version >= 3)
1010 index = goto_next_sequence_v3(data, index, seq_size);
1012 index = goto_next_sequence(data, index, seq_size);
1014 DRM_ERROR("Invalid sequence %u\n", seq_id);
1019 dev_priv->vbt.dsi.data = data;
1020 dev_priv->vbt.dsi.size = seq_size;
1021 dev_priv->vbt.dsi.seq_version = sequence->version;
1023 DRM_DEBUG_DRIVER("MIPI related VBT parsing complete\n");
1028 memset(dev_priv->vbt.dsi.sequence, 0, sizeof(dev_priv->vbt.dsi.sequence));
1031 static u8 translate_iboost(u8 val)
1033 static const u8 mapping[] = { 1, 3, 7 }; /* See VBT spec */
1035 if (val >= ARRAY_SIZE(mapping)) {
1036 DRM_DEBUG_KMS("Unsupported I_boost value found in VBT (%d), display may not work properly\n", val);
1039 return mapping[val];
1042 static void sanitize_ddc_pin(struct drm_i915_private *dev_priv,
1045 const struct ddi_vbt_port_info *info =
1046 &dev_priv->vbt.ddi_port_info[port];
1049 if (!info->alternate_ddc_pin)
1052 for_each_port_masked(p, (1 << port) - 1) {
1053 struct ddi_vbt_port_info *i = &dev_priv->vbt.ddi_port_info[p];
1055 if (info->alternate_ddc_pin != i->alternate_ddc_pin)
1058 DRM_DEBUG_KMS("port %c trying to use the same DDC pin (0x%x) as port %c, "
1059 "disabling port %c DVI/HDMI support\n",
1060 port_name(p), i->alternate_ddc_pin,
1061 port_name(port), port_name(p));
1064 * If we have multiple ports supposedly sharing the
1065 * pin, then dvi/hdmi couldn't exist on the shared
1066 * port. Otherwise they share the same ddc bin and
1067 * system couldn't communicate with them separately.
1069 * Due to parsing the ports in alphabetical order,
1070 * a higher port will always clobber a lower one.
1072 i->supports_dvi = false;
1073 i->supports_hdmi = false;
1074 i->alternate_ddc_pin = 0;
1078 static void sanitize_aux_ch(struct drm_i915_private *dev_priv,
1081 const struct ddi_vbt_port_info *info =
1082 &dev_priv->vbt.ddi_port_info[port];
1085 if (!info->alternate_aux_channel)
1088 for_each_port_masked(p, (1 << port) - 1) {
1089 struct ddi_vbt_port_info *i = &dev_priv->vbt.ddi_port_info[p];
1091 if (info->alternate_aux_channel != i->alternate_aux_channel)
1094 DRM_DEBUG_KMS("port %c trying to use the same AUX CH (0x%x) as port %c, "
1095 "disabling port %c DP support\n",
1096 port_name(p), i->alternate_aux_channel,
1097 port_name(port), port_name(p));
1100 * If we have multiple ports supposedlt sharing the
1101 * aux channel, then DP couldn't exist on the shared
1102 * port. Otherwise they share the same aux channel
1103 * and system couldn't communicate with them separately.
1105 * Due to parsing the ports in alphabetical order,
1106 * a higher port will always clobber a lower one.
1108 i->supports_dp = false;
1109 i->alternate_aux_channel = 0;
1113 static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
1114 const struct bdb_header *bdb)
1116 union child_device_config *it, *child = NULL;
1117 struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port];
1118 uint8_t hdmi_level_shift;
1120 bool is_dvi, is_hdmi, is_dp, is_edp, is_crt;
1121 uint8_t aux_channel, ddc_pin;
1122 /* Each DDI port can have more than one value on the "DVO Port" field,
1123 * so look for all the possible values for each port.
1125 int dvo_ports[][3] = {
1126 {DVO_PORT_HDMIA, DVO_PORT_DPA, -1},
1127 {DVO_PORT_HDMIB, DVO_PORT_DPB, -1},
1128 {DVO_PORT_HDMIC, DVO_PORT_DPC, -1},
1129 {DVO_PORT_HDMID, DVO_PORT_DPD, -1},
1130 {DVO_PORT_CRT, DVO_PORT_HDMIE, DVO_PORT_DPE},
1134 * Find the first child device to reference the port, report if more
1137 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1138 it = dev_priv->vbt.child_dev + i;
1140 for (j = 0; j < 3; j++) {
1141 if (dvo_ports[port][j] == -1)
1144 if (it->common.dvo_port == dvo_ports[port][j]) {
1146 DRM_DEBUG_KMS("More than one child device for port %c in VBT, using the first.\n",
1157 aux_channel = child->common.aux_channel;
1158 ddc_pin = child->common.ddc_pin;
1160 is_dvi = child->common.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
1161 is_dp = child->common.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
1162 is_crt = child->common.device_type & DEVICE_TYPE_ANALOG_OUTPUT;
1163 is_hdmi = is_dvi && (child->common.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
1164 is_edp = is_dp && (child->common.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR);
1166 info->supports_dvi = is_dvi;
1167 info->supports_hdmi = is_hdmi;
1168 info->supports_dp = is_dp;
1169 info->supports_edp = is_edp;
1171 DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n",
1172 port_name(port), is_dp, is_hdmi, is_dvi, is_edp, is_crt);
1174 if (is_edp && is_dvi)
1175 DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
1177 if (is_crt && port != PORT_E)
1178 DRM_DEBUG_KMS("Port %c is analog\n", port_name(port));
1179 if (is_crt && (is_dvi || is_dp))
1180 DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
1182 if (is_dvi && (port == PORT_A || port == PORT_E))
1183 DRM_DEBUG_KMS("Port %c is TMDS compatible\n", port_name(port));
1184 if (!is_dvi && !is_dp && !is_crt)
1185 DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
1187 if (is_edp && (port == PORT_B || port == PORT_C || port == PORT_E))
1188 DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port));
1191 info->alternate_ddc_pin = ddc_pin;
1193 sanitize_ddc_pin(dev_priv, port);
1197 info->alternate_aux_channel = aux_channel;
1199 sanitize_aux_ch(dev_priv, port);
1202 if (bdb->version >= 158) {
1203 /* The VBT HDMI level shift values match the table we have. */
1204 hdmi_level_shift = child->raw[7] & 0xF;
1205 DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
1208 info->hdmi_level_shift = hdmi_level_shift;
1211 /* Parse the I_boost config for SKL and above */
1212 if (bdb->version >= 196 && child->common.iboost) {
1213 info->dp_boost_level = translate_iboost(child->common.iboost_level & 0xF);
1214 DRM_DEBUG_KMS("VBT (e)DP boost level for port %c: %d\n",
1215 port_name(port), info->dp_boost_level);
1216 info->hdmi_boost_level = translate_iboost(child->common.iboost_level >> 4);
1217 DRM_DEBUG_KMS("VBT HDMI boost level for port %c: %d\n",
1218 port_name(port), info->hdmi_boost_level);
1222 static void parse_ddi_ports(struct drm_i915_private *dev_priv,
1223 const struct bdb_header *bdb)
1227 if (!HAS_DDI(dev_priv))
1230 if (!dev_priv->vbt.child_dev_num)
1233 if (bdb->version < 155)
1236 for (port = PORT_A; port < I915_MAX_PORTS; port++)
1237 parse_ddi_port(dev_priv, port, bdb);
1241 parse_device_mapping(struct drm_i915_private *dev_priv,
1242 const struct bdb_header *bdb)
1244 const struct bdb_general_definitions *p_defs;
1245 const union child_device_config *p_child;
1246 union child_device_config *child_dev_ptr;
1247 int i, child_device_num, count;
1251 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
1253 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
1256 if (bdb->version < 106) {
1258 } else if (bdb->version < 111) {
1260 } else if (bdb->version < 195) {
1261 BUILD_BUG_ON(sizeof(struct old_child_dev_config) != 33);
1262 expected_size = sizeof(struct old_child_dev_config);
1263 } else if (bdb->version == 195) {
1265 } else if (bdb->version <= 197) {
1269 BUILD_BUG_ON(sizeof(*p_child) < 38);
1270 DRM_DEBUG_DRIVER("Expected child device config size for VBT version %u not known; assuming %u\n",
1271 bdb->version, expected_size);
1274 /* Flag an error for unexpected size, but continue anyway. */
1275 if (p_defs->child_dev_size != expected_size)
1276 DRM_ERROR("Unexpected child device config size %u (expected %u for VBT version %u)\n",
1277 p_defs->child_dev_size, expected_size, bdb->version);
1279 /* The legacy sized child device config is the minimum we need. */
1280 if (p_defs->child_dev_size < sizeof(struct old_child_dev_config)) {
1281 DRM_DEBUG_KMS("Child device config size %u is too small.\n",
1282 p_defs->child_dev_size);
1286 /* get the block size of general definitions */
1287 block_size = get_blocksize(p_defs);
1288 /* get the number of child device */
1289 child_device_num = (block_size - sizeof(*p_defs)) /
1290 p_defs->child_dev_size;
1292 /* get the number of child device that is present */
1293 for (i = 0; i < child_device_num; i++) {
1294 p_child = child_device_ptr(p_defs, i);
1295 if (!p_child->common.device_type) {
1296 /* skip the device block if device type is invalid */
1302 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
1305 dev_priv->vbt.child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL);
1306 if (!dev_priv->vbt.child_dev) {
1307 DRM_DEBUG_KMS("No memory space for child device\n");
1311 dev_priv->vbt.child_dev_num = count;
1313 for (i = 0; i < child_device_num; i++) {
1314 p_child = child_device_ptr(p_defs, i);
1315 if (!p_child->common.device_type) {
1316 /* skip the device block if device type is invalid */
1320 child_dev_ptr = dev_priv->vbt.child_dev + count;
1324 * Copy as much as we know (sizeof) and is available
1325 * (child_dev_size) of the child device. Accessing the data must
1326 * depend on VBT version.
1328 memcpy(child_dev_ptr, p_child,
1329 min_t(size_t, p_defs->child_dev_size, sizeof(*p_child)));
1332 * copied full block, now init values when they are not
1333 * available in current version
1335 if (bdb->version < 196) {
1336 /* Set default values for bits added from v196 */
1337 child_dev_ptr->common.iboost = 0;
1338 child_dev_ptr->common.hpd_invert = 0;
1341 if (bdb->version < 192)
1342 child_dev_ptr->common.lspcon = 0;
1347 /* Common defaults which may be overridden by VBT. */
1349 init_vbt_defaults(struct drm_i915_private *dev_priv)
1353 dev_priv->vbt.crt_ddc_pin = GMBUS_PIN_VGADDC;
1355 /* Default to having backlight */
1356 dev_priv->vbt.backlight.present = true;
1358 /* LFP panel data */
1359 dev_priv->vbt.lvds_dither = 1;
1360 dev_priv->vbt.lvds_vbt = 0;
1362 /* SDVO panel data */
1363 dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
1365 /* general features */
1366 dev_priv->vbt.int_tv_support = 1;
1367 dev_priv->vbt.int_crt_support = 1;
1369 /* Default to using SSC */
1370 dev_priv->vbt.lvds_use_ssc = 1;
1372 * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
1375 dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev_priv,
1376 !HAS_PCH_SPLIT(dev_priv));
1377 DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv->vbt.lvds_ssc_freq);
1379 for (port = PORT_A; port < I915_MAX_PORTS; port++) {
1380 struct ddi_vbt_port_info *info =
1381 &dev_priv->vbt.ddi_port_info[port];
1383 info->hdmi_level_shift = HDMI_LEVEL_SHIFT_UNKNOWN;
1387 /* Defaults to initialize only if there is no VBT. */
1389 init_vbt_missing_defaults(struct drm_i915_private *dev_priv)
1393 for (port = PORT_A; port < I915_MAX_PORTS; port++) {
1394 struct ddi_vbt_port_info *info =
1395 &dev_priv->vbt.ddi_port_info[port];
1397 info->supports_dvi = (port != PORT_A && port != PORT_E);
1398 info->supports_hdmi = info->supports_dvi;
1399 info->supports_dp = (port != PORT_E);
1403 static const struct bdb_header *get_bdb_header(const struct vbt_header *vbt)
1405 const void *_vbt = vbt;
1407 return _vbt + vbt->bdb_offset;
1411 * intel_bios_is_valid_vbt - does the given buffer contain a valid VBT
1412 * @buf: pointer to a buffer to validate
1413 * @size: size of the buffer
1415 * Returns true on valid VBT.
1417 bool intel_bios_is_valid_vbt(const void *buf, size_t size)
1419 const struct vbt_header *vbt = buf;
1420 const struct bdb_header *bdb;
1425 if (sizeof(struct vbt_header) > size) {
1426 DRM_DEBUG_DRIVER("VBT header incomplete\n");
1430 if (memcmp(vbt->signature, "$VBT", 4)) {
1431 DRM_DEBUG_DRIVER("VBT invalid signature\n");
1435 if (range_overflows_t(size_t,
1437 sizeof(struct bdb_header),
1439 DRM_DEBUG_DRIVER("BDB header incomplete\n");
1443 bdb = get_bdb_header(vbt);
1444 if (range_overflows_t(size_t, vbt->bdb_offset, bdb->bdb_size, size)) {
1445 DRM_DEBUG_DRIVER("BDB incomplete\n");
1452 static const struct vbt_header *find_vbt(void __iomem *bios, size_t size)
1456 /* Scour memory looking for the VBT signature. */
1457 for (i = 0; i + 4 < size; i++) {
1460 if (ioread32(bios + i) != *((const u32 *) "$VBT"))
1464 * This is the one place where we explicitly discard the address
1465 * space (__iomem) of the BIOS/VBT.
1467 vbt = (void __force *) bios + i;
1468 if (intel_bios_is_valid_vbt(vbt, size - i))
1478 * intel_bios_init - find VBT and initialize settings from the BIOS
1479 * @dev_priv: i915 device instance
1481 * Parse and initialize settings from the Video BIOS Tables (VBT). If the VBT
1482 * was not found in ACPI OpRegion, try to find it in PCI ROM first. Also
1483 * initialize some defaults if the VBT is not present at all.
1485 void intel_bios_init(struct drm_i915_private *dev_priv)
1487 struct pci_dev *pdev = dev_priv->drm.pdev;
1488 const struct vbt_header *vbt = dev_priv->opregion.vbt;
1489 const struct bdb_header *bdb;
1490 u8 __iomem *bios = NULL;
1492 if (HAS_PCH_NOP(dev_priv)) {
1493 DRM_DEBUG_KMS("Skipping VBT init due to disabled display.\n");
1497 init_vbt_defaults(dev_priv);
1499 /* If the OpRegion does not have VBT, look in PCI ROM. */
1503 bios = pci_map_rom(pdev, &size);
1507 vbt = find_vbt(bios, size);
1511 DRM_DEBUG_KMS("Found valid VBT in PCI ROM\n");
1514 bdb = get_bdb_header(vbt);
1516 DRM_DEBUG_KMS("VBT signature \"%.*s\", BDB version %d\n",
1517 (int)sizeof(vbt->signature), vbt->signature, bdb->version);
1519 /* Grab useful general definitions */
1520 parse_general_features(dev_priv, bdb);
1521 parse_general_definitions(dev_priv, bdb);
1522 parse_lfp_panel_data(dev_priv, bdb);
1523 parse_lfp_backlight(dev_priv, bdb);
1524 parse_sdvo_panel_data(dev_priv, bdb);
1525 parse_sdvo_device_mapping(dev_priv, bdb);
1526 parse_device_mapping(dev_priv, bdb);
1527 parse_driver_features(dev_priv, bdb);
1528 parse_edp(dev_priv, bdb);
1529 parse_psr(dev_priv, bdb);
1530 parse_mipi_config(dev_priv, bdb);
1531 parse_mipi_sequence(dev_priv, bdb);
1532 parse_ddi_ports(dev_priv, bdb);
1536 DRM_INFO("Failed to find VBIOS tables (VBT)\n");
1537 init_vbt_missing_defaults(dev_priv);
1541 pci_unmap_rom(pdev, bios);
1545 * intel_bios_is_tv_present - is integrated TV present in VBT
1546 * @dev_priv: i915 device instance
1548 * Return true if TV is present. If no child devices were parsed from VBT,
1549 * assume TV is present.
1551 bool intel_bios_is_tv_present(struct drm_i915_private *dev_priv)
1553 union child_device_config *p_child;
1556 if (!dev_priv->vbt.int_tv_support)
1559 if (!dev_priv->vbt.child_dev_num)
1562 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1563 p_child = dev_priv->vbt.child_dev + i;
1565 * If the device type is not TV, continue.
1567 switch (p_child->old.device_type) {
1568 case DEVICE_TYPE_INT_TV:
1569 case DEVICE_TYPE_TV:
1570 case DEVICE_TYPE_TV_SVIDEO_COMPOSITE:
1575 /* Only when the addin_offset is non-zero, it is regarded
1578 if (p_child->old.addin_offset)
1586 * intel_bios_is_lvds_present - is LVDS present in VBT
1587 * @dev_priv: i915 device instance
1588 * @i2c_pin: i2c pin for LVDS if present
1590 * Return true if LVDS is present. If no child devices were parsed from VBT,
1591 * assume LVDS is present.
1593 bool intel_bios_is_lvds_present(struct drm_i915_private *dev_priv, u8 *i2c_pin)
1597 if (!dev_priv->vbt.child_dev_num)
1600 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1601 union child_device_config *uchild = dev_priv->vbt.child_dev + i;
1602 struct old_child_dev_config *child = &uchild->old;
1604 /* If the device type is not LFP, continue.
1605 * We have to check both the new identifiers as well as the
1606 * old for compatibility with some BIOSes.
1608 if (child->device_type != DEVICE_TYPE_INT_LFP &&
1609 child->device_type != DEVICE_TYPE_LFP)
1612 if (intel_gmbus_is_valid_pin(dev_priv, child->i2c_pin))
1613 *i2c_pin = child->i2c_pin;
1615 /* However, we cannot trust the BIOS writers to populate
1616 * the VBT correctly. Since LVDS requires additional
1617 * information from AIM blocks, a non-zero addin offset is
1618 * a good indicator that the LVDS is actually present.
1620 if (child->addin_offset)
1623 /* But even then some BIOS writers perform some black magic
1624 * and instantiate the device without reference to any
1625 * additional data. Trust that if the VBT was written into
1626 * the OpRegion then they have validated the LVDS's existence.
1628 if (dev_priv->opregion.vbt)
1636 * intel_bios_is_port_present - is the specified digital port present
1637 * @dev_priv: i915 device instance
1638 * @port: port to check
1640 * Return true if the device in %port is present.
1642 bool intel_bios_is_port_present(struct drm_i915_private *dev_priv, enum port port)
1644 static const struct {
1646 } port_mapping[] = {
1647 [PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, },
1648 [PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, },
1649 [PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, },
1650 [PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, },
1654 /* FIXME maybe deal with port A as well? */
1655 if (WARN_ON(port == PORT_A) || port >= ARRAY_SIZE(port_mapping))
1658 if (!dev_priv->vbt.child_dev_num)
1661 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1662 const union child_device_config *p_child =
1663 &dev_priv->vbt.child_dev[i];
1664 if ((p_child->common.dvo_port == port_mapping[port].dp ||
1665 p_child->common.dvo_port == port_mapping[port].hdmi) &&
1666 (p_child->common.device_type & (DEVICE_TYPE_TMDS_DVI_SIGNALING |
1667 DEVICE_TYPE_DISPLAYPORT_OUTPUT)))
1675 * intel_bios_is_port_edp - is the device in given port eDP
1676 * @dev_priv: i915 device instance
1677 * @port: port to check
1679 * Return true if the device in %port is eDP.
1681 bool intel_bios_is_port_edp(struct drm_i915_private *dev_priv, enum port port)
1683 union child_device_config *p_child;
1684 static const short port_mapping[] = {
1685 [PORT_B] = DVO_PORT_DPB,
1686 [PORT_C] = DVO_PORT_DPC,
1687 [PORT_D] = DVO_PORT_DPD,
1688 [PORT_E] = DVO_PORT_DPE,
1692 if (HAS_DDI(dev_priv))
1693 return dev_priv->vbt.ddi_port_info[port].supports_edp;
1695 if (!dev_priv->vbt.child_dev_num)
1698 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1699 p_child = dev_priv->vbt.child_dev + i;
1701 if (p_child->common.dvo_port == port_mapping[port] &&
1702 (p_child->common.device_type & DEVICE_TYPE_eDP_BITS) ==
1703 (DEVICE_TYPE_eDP & DEVICE_TYPE_eDP_BITS))
1710 static bool child_dev_is_dp_dual_mode(const union child_device_config *p_child,
1713 static const struct {
1715 } port_mapping[] = {
1717 * Buggy VBTs may declare DP ports as having
1718 * HDMI type dvo_port :( So let's check both.
1720 [PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, },
1721 [PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, },
1722 [PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, },
1723 [PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, },
1726 if (port == PORT_A || port >= ARRAY_SIZE(port_mapping))
1729 if ((p_child->common.device_type & DEVICE_TYPE_DP_DUAL_MODE_BITS) !=
1730 (DEVICE_TYPE_DP_DUAL_MODE & DEVICE_TYPE_DP_DUAL_MODE_BITS))
1733 if (p_child->common.dvo_port == port_mapping[port].dp)
1736 /* Only accept a HDMI dvo_port as DP++ if it has an AUX channel */
1737 if (p_child->common.dvo_port == port_mapping[port].hdmi &&
1738 p_child->common.aux_channel != 0)
1744 bool intel_bios_is_port_dp_dual_mode(struct drm_i915_private *dev_priv,
1749 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1750 const union child_device_config *p_child =
1751 &dev_priv->vbt.child_dev[i];
1753 if (child_dev_is_dp_dual_mode(p_child, port))
1761 * intel_bios_is_dsi_present - is DSI present in VBT
1762 * @dev_priv: i915 device instance
1763 * @port: port for DSI if present
1765 * Return true if DSI is present, and return the port in %port.
1767 bool intel_bios_is_dsi_present(struct drm_i915_private *dev_priv,
1770 union child_device_config *p_child;
1774 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1775 p_child = dev_priv->vbt.child_dev + i;
1777 if (!(p_child->common.device_type & DEVICE_TYPE_MIPI_OUTPUT))
1780 dvo_port = p_child->common.dvo_port;
1783 case DVO_PORT_MIPIA:
1784 case DVO_PORT_MIPIC:
1786 *port = dvo_port - DVO_PORT_MIPIA;
1788 case DVO_PORT_MIPIB:
1789 case DVO_PORT_MIPID:
1790 DRM_DEBUG_KMS("VBT has unsupported DSI port %c\n",
1791 port_name(dvo_port - DVO_PORT_MIPIA));
1800 * intel_bios_is_port_hpd_inverted - is HPD inverted for %port
1801 * @dev_priv: i915 device instance
1802 * @port: port to check
1804 * Return true if HPD should be inverted for %port.
1807 intel_bios_is_port_hpd_inverted(struct drm_i915_private *dev_priv,
1812 if (WARN_ON_ONCE(!IS_GEN9_LP(dev_priv)))
1815 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1816 if (!dev_priv->vbt.child_dev[i].common.hpd_invert)
1819 switch (dev_priv->vbt.child_dev[i].common.dvo_port) {
1821 case DVO_PORT_HDMIA:
1826 case DVO_PORT_HDMIB:
1831 case DVO_PORT_HDMIC:
1844 * intel_bios_is_lspcon_present - if LSPCON is attached on %port
1845 * @dev_priv: i915 device instance
1846 * @port: port to check
1848 * Return true if LSPCON is present on this port
1851 intel_bios_is_lspcon_present(struct drm_i915_private *dev_priv,
1856 if (!HAS_LSPCON(dev_priv))
1859 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1860 if (!dev_priv->vbt.child_dev[i].common.lspcon)
1863 switch (dev_priv->vbt.child_dev[i].common.dvo_port) {
1865 case DVO_PORT_HDMIA:
1870 case DVO_PORT_HDMIB:
1875 case DVO_PORT_HDMIC:
1880 case DVO_PORT_HDMID: