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
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;
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 /* Some VBTs have bogus h/vtotal values */
143 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
144 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
145 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
146 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
148 drm_mode_set_name(panel_fixed_mode);
151 static const struct lvds_dvo_timing *
152 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
153 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs,
157 * the size of fp_timing varies on the different platform.
158 * So calculate the DVO timing relative offset in LVDS data
159 * entry to get the DVO timing entry
163 lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
164 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
165 int dvo_timing_offset =
166 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
167 lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
168 char *entry = (char *)lvds_lfp_data->data + lfp_data_size * index;
170 return (struct lvds_dvo_timing *)(entry + dvo_timing_offset);
173 /* get lvds_fp_timing entry
174 * this function may return NULL if the corresponding entry is invalid
176 static const struct lvds_fp_timing *
177 get_lvds_fp_timing(const struct bdb_header *bdb,
178 const struct bdb_lvds_lfp_data *data,
179 const struct bdb_lvds_lfp_data_ptrs *ptrs,
182 size_t data_ofs = (const u8 *)data - (const u8 *)bdb;
183 u16 data_size = ((const u16 *)data)[-1]; /* stored in header */
186 if (index >= ARRAY_SIZE(ptrs->ptr))
188 ofs = ptrs->ptr[index].fp_timing_offset;
189 if (ofs < data_ofs ||
190 ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size)
192 return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs);
195 /* Try to find integrated panel data */
197 parse_lfp_panel_data(struct drm_i915_private *dev_priv,
198 const struct bdb_header *bdb)
200 const struct bdb_lvds_options *lvds_options;
201 const struct bdb_lvds_lfp_data *lvds_lfp_data;
202 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
203 const struct lvds_dvo_timing *panel_dvo_timing;
204 const struct lvds_fp_timing *fp_timing;
205 struct drm_display_mode *panel_fixed_mode;
210 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
214 dev_priv->vbt.lvds_dither = lvds_options->pixel_dither;
216 ret = intel_opregion_get_panel_type(dev_priv->dev);
220 DRM_DEBUG_KMS("Panel type: %d (OpRegion)\n", panel_type);
222 if (lvds_options->panel_type > 0xf) {
223 DRM_DEBUG_KMS("Invalid VBT panel type 0x%x\n",
224 lvds_options->panel_type);
227 panel_type = lvds_options->panel_type;
228 DRM_DEBUG_KMS("Panel type: %d (VBT)\n", panel_type);
231 dev_priv->vbt.panel_type = panel_type;
233 drrs_mode = (lvds_options->dps_panel_type_bits
234 >> (panel_type * 2)) & MODE_MASK;
236 * VBT has static DRRS = 0 and seamless DRRS = 2.
237 * The below piece of code is required to adjust vbt.drrs_type
238 * to match the enum drrs_support_type.
242 dev_priv->vbt.drrs_type = STATIC_DRRS_SUPPORT;
243 DRM_DEBUG_KMS("DRRS supported mode is static\n");
246 dev_priv->vbt.drrs_type = SEAMLESS_DRRS_SUPPORT;
247 DRM_DEBUG_KMS("DRRS supported mode is seamless\n");
250 dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
251 DRM_DEBUG_KMS("DRRS not supported (VBT input)\n");
255 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
259 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
260 if (!lvds_lfp_data_ptrs)
263 dev_priv->vbt.lvds_vbt = 1;
265 panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
269 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
270 if (!panel_fixed_mode)
273 fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);
275 dev_priv->vbt.lfp_lvds_vbt_mode = panel_fixed_mode;
277 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
278 drm_mode_debug_printmodeline(panel_fixed_mode);
280 fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data,
284 /* check the resolution, just to be sure */
285 if (fp_timing->x_res == panel_fixed_mode->hdisplay &&
286 fp_timing->y_res == panel_fixed_mode->vdisplay) {
287 dev_priv->vbt.bios_lvds_val = fp_timing->lvds_reg_val;
288 DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
289 dev_priv->vbt.bios_lvds_val);
295 parse_lfp_backlight(struct drm_i915_private *dev_priv,
296 const struct bdb_header *bdb)
298 const struct bdb_lfp_backlight_data *backlight_data;
299 const struct bdb_lfp_backlight_data_entry *entry;
300 int panel_type = dev_priv->vbt.panel_type;
302 backlight_data = find_section(bdb, BDB_LVDS_BACKLIGHT);
306 if (backlight_data->entry_size != sizeof(backlight_data->data[0])) {
307 DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n",
308 backlight_data->entry_size);
312 entry = &backlight_data->data[panel_type];
314 dev_priv->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM;
315 if (!dev_priv->vbt.backlight.present) {
316 DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n",
321 dev_priv->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz;
322 dev_priv->vbt.backlight.active_low_pwm = entry->active_low_pwm;
323 dev_priv->vbt.backlight.min_brightness = entry->min_brightness;
324 DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, "
325 "active %s, min brightness %u, level %u\n",
326 dev_priv->vbt.backlight.pwm_freq_hz,
327 dev_priv->vbt.backlight.active_low_pwm ? "low" : "high",
328 dev_priv->vbt.backlight.min_brightness,
329 backlight_data->level[panel_type]);
332 /* Try to find sdvo panel data */
334 parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
335 const struct bdb_header *bdb)
337 const struct lvds_dvo_timing *dvo_timing;
338 struct drm_display_mode *panel_fixed_mode;
341 index = i915.vbt_sdvo_panel_type;
343 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
348 const struct bdb_sdvo_lvds_options *sdvo_lvds_options;
350 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
351 if (!sdvo_lvds_options)
354 index = sdvo_lvds_options->panel_type;
357 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
361 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
362 if (!panel_fixed_mode)
365 fill_detail_timing_data(panel_fixed_mode, dvo_timing + index);
367 dev_priv->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode;
369 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
370 drm_mode_debug_printmodeline(panel_fixed_mode);
373 static int intel_bios_ssc_frequency(struct drm_i915_private *dev_priv,
376 switch (INTEL_INFO(dev_priv)->gen) {
378 return alternate ? 66667 : 48000;
381 return alternate ? 100000 : 96000;
383 return alternate ? 100000 : 120000;
388 parse_general_features(struct drm_i915_private *dev_priv,
389 const struct bdb_header *bdb)
391 const struct bdb_general_features *general;
393 general = find_section(bdb, BDB_GENERAL_FEATURES);
397 dev_priv->vbt.int_tv_support = general->int_tv_support;
398 /* int_crt_support can't be trusted on earlier platforms */
399 if (bdb->version >= 155 &&
400 (HAS_DDI(dev_priv) || IS_VALLEYVIEW(dev_priv)))
401 dev_priv->vbt.int_crt_support = general->int_crt_support;
402 dev_priv->vbt.lvds_use_ssc = general->enable_ssc;
403 dev_priv->vbt.lvds_ssc_freq =
404 intel_bios_ssc_frequency(dev_priv, general->ssc_freq);
405 dev_priv->vbt.display_clock_mode = general->display_clock_mode;
406 dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
407 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",
408 dev_priv->vbt.int_tv_support,
409 dev_priv->vbt.int_crt_support,
410 dev_priv->vbt.lvds_use_ssc,
411 dev_priv->vbt.lvds_ssc_freq,
412 dev_priv->vbt.display_clock_mode,
413 dev_priv->vbt.fdi_rx_polarity_inverted);
417 parse_general_definitions(struct drm_i915_private *dev_priv,
418 const struct bdb_header *bdb)
420 const struct bdb_general_definitions *general;
422 general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
424 u16 block_size = get_blocksize(general);
425 if (block_size >= sizeof(*general)) {
426 int bus_pin = general->crt_ddc_gmbus_pin;
427 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
428 if (intel_gmbus_is_valid_pin(dev_priv, bus_pin))
429 dev_priv->vbt.crt_ddc_pin = bus_pin;
431 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
437 static const union child_device_config *
438 child_device_ptr(const struct bdb_general_definitions *p_defs, int i)
440 return (const void *) &p_defs->devices[i * p_defs->child_dev_size];
444 parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
445 const struct bdb_header *bdb)
447 struct sdvo_device_mapping *p_mapping;
448 const struct bdb_general_definitions *p_defs;
449 const struct old_child_dev_config *child; /* legacy */
450 int i, child_device_num, count;
453 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
455 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
460 * Only parse SDVO mappings when the general definitions block child
461 * device size matches that of the *legacy* child device config
462 * struct. Thus, SDVO mapping will be skipped for newer VBT.
464 if (p_defs->child_dev_size != sizeof(*child)) {
465 DRM_DEBUG_KMS("Unsupported child device size for SDVO mapping.\n");
468 /* get the block size of general definitions */
469 block_size = get_blocksize(p_defs);
470 /* get the number of child device */
471 child_device_num = (block_size - sizeof(*p_defs)) /
472 p_defs->child_dev_size;
474 for (i = 0; i < child_device_num; i++) {
475 child = &child_device_ptr(p_defs, i)->old;
476 if (!child->device_type) {
477 /* skip the device block if device type is invalid */
480 if (child->slave_addr != SLAVE_ADDR1 &&
481 child->slave_addr != SLAVE_ADDR2) {
483 * If the slave address is neither 0x70 nor 0x72,
484 * it is not a SDVO device. Skip it.
488 if (child->dvo_port != DEVICE_PORT_DVOB &&
489 child->dvo_port != DEVICE_PORT_DVOC) {
490 /* skip the incorrect SDVO port */
491 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
494 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
497 (child->dvo_port == DEVICE_PORT_DVOB) ?
499 p_mapping = &dev_priv->vbt.sdvo_mappings[child->dvo_port - 1];
500 if (!p_mapping->initialized) {
501 p_mapping->dvo_port = child->dvo_port;
502 p_mapping->slave_addr = child->slave_addr;
503 p_mapping->dvo_wiring = child->dvo_wiring;
504 p_mapping->ddc_pin = child->ddc_pin;
505 p_mapping->i2c_pin = child->i2c_pin;
506 p_mapping->initialized = 1;
507 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
509 p_mapping->slave_addr,
510 p_mapping->dvo_wiring,
514 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
515 "two SDVO device.\n");
517 if (child->slave2_addr) {
518 /* Maybe this is a SDVO device with multiple inputs */
519 /* And the mapping info is not added */
520 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
521 " is a SDVO device with multiple inputs.\n");
527 /* No SDVO device info is found */
528 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
534 parse_driver_features(struct drm_i915_private *dev_priv,
535 const struct bdb_header *bdb)
537 const struct bdb_driver_features *driver;
539 driver = find_section(bdb, BDB_DRIVER_FEATURES);
543 if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
544 dev_priv->vbt.edp.support = 1;
546 DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver->drrs_enabled);
548 * If DRRS is not supported, drrs_type has to be set to 0.
549 * This is because, VBT is configured in such a way that
550 * static DRRS is 0 and DRRS not supported is represented by
551 * driver->drrs_enabled=false
553 if (!driver->drrs_enabled)
554 dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
558 parse_edp(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
560 const struct bdb_edp *edp;
561 const struct edp_power_seq *edp_pps;
562 const struct edp_link_params *edp_link_params;
563 int panel_type = dev_priv->vbt.panel_type;
565 edp = find_section(bdb, BDB_EDP);
567 if (dev_priv->vbt.edp.support)
568 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
572 switch ((edp->color_depth >> (panel_type * 2)) & 3) {
574 dev_priv->vbt.edp.bpp = 18;
577 dev_priv->vbt.edp.bpp = 24;
580 dev_priv->vbt.edp.bpp = 30;
584 /* Get the eDP sequencing and link info */
585 edp_pps = &edp->power_seqs[panel_type];
586 edp_link_params = &edp->link_params[panel_type];
588 dev_priv->vbt.edp.pps = *edp_pps;
590 switch (edp_link_params->rate) {
592 dev_priv->vbt.edp.rate = DP_LINK_BW_1_62;
595 dev_priv->vbt.edp.rate = DP_LINK_BW_2_7;
598 DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n",
599 edp_link_params->rate);
603 switch (edp_link_params->lanes) {
605 dev_priv->vbt.edp.lanes = 1;
608 dev_priv->vbt.edp.lanes = 2;
611 dev_priv->vbt.edp.lanes = 4;
614 DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n",
615 edp_link_params->lanes);
619 switch (edp_link_params->preemphasis) {
620 case EDP_PREEMPHASIS_NONE:
621 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_0;
623 case EDP_PREEMPHASIS_3_5dB:
624 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_1;
626 case EDP_PREEMPHASIS_6dB:
627 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_2;
629 case EDP_PREEMPHASIS_9_5dB:
630 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_3;
633 DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n",
634 edp_link_params->preemphasis);
638 switch (edp_link_params->vswing) {
639 case EDP_VSWING_0_4V:
640 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
642 case EDP_VSWING_0_6V:
643 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_1;
645 case EDP_VSWING_0_8V:
646 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
648 case EDP_VSWING_1_2V:
649 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
652 DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n",
653 edp_link_params->vswing);
657 if (bdb->version >= 173) {
660 /* Don't read from VBT if module parameter has valid value*/
661 if (i915.edp_vswing) {
662 dev_priv->vbt.edp.low_vswing = i915.edp_vswing == 1;
664 vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF;
665 dev_priv->vbt.edp.low_vswing = vswing == 0;
671 parse_psr(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
673 const struct bdb_psr *psr;
674 const struct psr_table *psr_table;
675 int panel_type = dev_priv->vbt.panel_type;
677 psr = find_section(bdb, BDB_PSR);
679 DRM_DEBUG_KMS("No PSR BDB found.\n");
683 psr_table = &psr->psr_table[panel_type];
685 dev_priv->vbt.psr.full_link = psr_table->full_link;
686 dev_priv->vbt.psr.require_aux_wakeup = psr_table->require_aux_to_wakeup;
688 /* Allowed VBT values goes from 0 to 15 */
689 dev_priv->vbt.psr.idle_frames = psr_table->idle_frames < 0 ? 0 :
690 psr_table->idle_frames > 15 ? 15 : psr_table->idle_frames;
692 switch (psr_table->lines_to_wait) {
694 dev_priv->vbt.psr.lines_to_wait = PSR_0_LINES_TO_WAIT;
697 dev_priv->vbt.psr.lines_to_wait = PSR_1_LINE_TO_WAIT;
700 dev_priv->vbt.psr.lines_to_wait = PSR_4_LINES_TO_WAIT;
703 dev_priv->vbt.psr.lines_to_wait = PSR_8_LINES_TO_WAIT;
706 DRM_DEBUG_KMS("VBT has unknown PSR lines to wait %u\n",
707 psr_table->lines_to_wait);
711 dev_priv->vbt.psr.tp1_wakeup_time = psr_table->tp1_wakeup_time;
712 dev_priv->vbt.psr.tp2_tp3_wakeup_time = psr_table->tp2_tp3_wakeup_time;
716 parse_mipi_config(struct drm_i915_private *dev_priv,
717 const struct bdb_header *bdb)
719 const struct bdb_mipi_config *start;
720 const struct mipi_config *config;
721 const struct mipi_pps_data *pps;
722 int panel_type = dev_priv->vbt.panel_type;
724 /* parse MIPI blocks only if LFP type is MIPI */
725 if (!intel_bios_is_dsi_present(dev_priv, NULL))
728 /* Initialize this to undefined indicating no generic MIPI support */
729 dev_priv->vbt.dsi.panel_id = MIPI_DSI_UNDEFINED_PANEL_ID;
731 /* Block #40 is already parsed and panel_fixed_mode is
732 * stored in dev_priv->lfp_lvds_vbt_mode
733 * resuse this when needed
736 /* Parse #52 for panel index used from panel_type already
739 start = find_section(bdb, BDB_MIPI_CONFIG);
741 DRM_DEBUG_KMS("No MIPI config BDB found");
745 DRM_DEBUG_DRIVER("Found MIPI Config block, panel index = %d\n",
749 * get hold of the correct configuration block and pps data as per
750 * the panel_type as index
752 config = &start->config[panel_type];
753 pps = &start->pps[panel_type];
755 /* store as of now full data. Trim when we realise all is not needed */
756 dev_priv->vbt.dsi.config = kmemdup(config, sizeof(struct mipi_config), GFP_KERNEL);
757 if (!dev_priv->vbt.dsi.config)
760 dev_priv->vbt.dsi.pps = kmemdup(pps, sizeof(struct mipi_pps_data), GFP_KERNEL);
761 if (!dev_priv->vbt.dsi.pps) {
762 kfree(dev_priv->vbt.dsi.config);
766 /* We have mandatory mipi config blocks. Initialize as generic panel */
767 dev_priv->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID;
770 /* Find the sequence block and size for the given panel. */
772 find_panel_sequence_block(const struct bdb_mipi_sequence *sequence,
773 u16 panel_id, u32 *seq_size)
775 u32 total = get_blocksize(sequence);
776 const u8 *data = &sequence->data[0];
779 int header_size = sequence->version >= 3 ? 5 : 3;
783 /* skip new block size */
784 if (sequence->version >= 3)
787 for (i = 0; i < MAX_MIPI_CONFIGURATIONS && index < total; i++) {
788 if (index + header_size > total) {
789 DRM_ERROR("Invalid sequence block (header)\n");
793 current_id = *(data + index);
794 if (sequence->version >= 3)
795 current_size = *((const u32 *)(data + index + 1));
797 current_size = *((const u16 *)(data + index + 1));
799 index += header_size;
801 if (index + current_size > total) {
802 DRM_ERROR("Invalid sequence block\n");
806 if (current_id == panel_id) {
807 *seq_size = current_size;
811 index += current_size;
814 DRM_ERROR("Sequence block detected but no valid configuration\n");
819 static int goto_next_sequence(const u8 *data, int index, int total)
823 /* Skip Sequence Byte. */
824 for (index = index + 1; index < total; index += len) {
825 u8 operation_byte = *(data + index);
828 switch (operation_byte) {
829 case MIPI_SEQ_ELEM_END:
831 case MIPI_SEQ_ELEM_SEND_PKT:
832 if (index + 4 > total)
835 len = *((const u16 *)(data + index + 2)) + 4;
837 case MIPI_SEQ_ELEM_DELAY:
840 case MIPI_SEQ_ELEM_GPIO:
843 case MIPI_SEQ_ELEM_I2C:
844 if (index + 7 > total)
846 len = *(data + index + 6) + 7;
849 DRM_ERROR("Unknown operation byte\n");
857 static int goto_next_sequence_v3(const u8 *data, int index, int total)
861 u32 size_of_sequence;
864 * Could skip sequence based on Size of Sequence alone, but also do some
865 * checking on the structure.
868 DRM_ERROR("Too small sequence size\n");
872 /* Skip Sequence Byte. */
876 * Size of Sequence. Excludes the Sequence Byte and the size itself,
877 * includes MIPI_SEQ_ELEM_END byte, excludes the final MIPI_SEQ_END
880 size_of_sequence = *((const uint32_t *)(data + index));
883 seq_end = index + size_of_sequence;
884 if (seq_end > total) {
885 DRM_ERROR("Invalid sequence size\n");
889 for (; index < total; index += len) {
890 u8 operation_byte = *(data + index);
893 if (operation_byte == MIPI_SEQ_ELEM_END) {
894 if (index != seq_end) {
895 DRM_ERROR("Invalid element structure\n");
901 len = *(data + index);
905 * FIXME: Would be nice to check elements like for v1/v2 in
906 * goto_next_sequence() above.
908 switch (operation_byte) {
909 case MIPI_SEQ_ELEM_SEND_PKT:
910 case MIPI_SEQ_ELEM_DELAY:
911 case MIPI_SEQ_ELEM_GPIO:
912 case MIPI_SEQ_ELEM_I2C:
913 case MIPI_SEQ_ELEM_SPI:
914 case MIPI_SEQ_ELEM_PMIC:
917 DRM_ERROR("Unknown operation byte %u\n",
927 parse_mipi_sequence(struct drm_i915_private *dev_priv,
928 const struct bdb_header *bdb)
930 int panel_type = dev_priv->vbt.panel_type;
931 const struct bdb_mipi_sequence *sequence;
937 /* Only our generic panel driver uses the sequence block. */
938 if (dev_priv->vbt.dsi.panel_id != MIPI_DSI_GENERIC_PANEL_ID)
941 sequence = find_section(bdb, BDB_MIPI_SEQUENCE);
943 DRM_DEBUG_KMS("No MIPI Sequence found, parsing complete\n");
947 /* Fail gracefully for forward incompatible sequence block. */
948 if (sequence->version >= 4) {
949 DRM_ERROR("Unable to parse MIPI Sequence Block v%u\n",
954 DRM_DEBUG_DRIVER("Found MIPI sequence block v%u\n", sequence->version);
956 seq_data = find_panel_sequence_block(sequence, panel_type, &seq_size);
960 data = kmemdup(seq_data, seq_size, GFP_KERNEL);
964 /* Parse the sequences, store pointers to each sequence. */
966 u8 seq_id = *(data + index);
967 if (seq_id == MIPI_SEQ_END)
970 if (seq_id >= MIPI_SEQ_MAX) {
971 DRM_ERROR("Unknown sequence %u\n", seq_id);
975 dev_priv->vbt.dsi.sequence[seq_id] = data + index;
977 if (sequence->version >= 3)
978 index = goto_next_sequence_v3(data, index, seq_size);
980 index = goto_next_sequence(data, index, seq_size);
982 DRM_ERROR("Invalid sequence %u\n", seq_id);
987 dev_priv->vbt.dsi.data = data;
988 dev_priv->vbt.dsi.size = seq_size;
989 dev_priv->vbt.dsi.seq_version = sequence->version;
991 DRM_DEBUG_DRIVER("MIPI related VBT parsing complete\n");
996 memset(dev_priv->vbt.dsi.sequence, 0, sizeof(dev_priv->vbt.dsi.sequence));
999 static u8 translate_iboost(u8 val)
1001 static const u8 mapping[] = { 1, 3, 7 }; /* See VBT spec */
1003 if (val >= ARRAY_SIZE(mapping)) {
1004 DRM_DEBUG_KMS("Unsupported I_boost value found in VBT (%d), display may not work properly\n", val);
1007 return mapping[val];
1010 static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
1011 const struct bdb_header *bdb)
1013 union child_device_config *it, *child = NULL;
1014 struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port];
1015 uint8_t hdmi_level_shift;
1017 bool is_dvi, is_hdmi, is_dp, is_edp, is_crt;
1018 uint8_t aux_channel, ddc_pin;
1019 /* Each DDI port can have more than one value on the "DVO Port" field,
1020 * so look for all the possible values for each port and abort if more
1021 * than one is found. */
1022 int dvo_ports[][3] = {
1023 {DVO_PORT_HDMIA, DVO_PORT_DPA, -1},
1024 {DVO_PORT_HDMIB, DVO_PORT_DPB, -1},
1025 {DVO_PORT_HDMIC, DVO_PORT_DPC, -1},
1026 {DVO_PORT_HDMID, DVO_PORT_DPD, -1},
1027 {DVO_PORT_CRT, DVO_PORT_HDMIE, DVO_PORT_DPE},
1030 /* Find the child device to use, abort if more than one found. */
1031 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1032 it = dev_priv->vbt.child_dev + i;
1034 for (j = 0; j < 3; j++) {
1035 if (dvo_ports[port][j] == -1)
1038 if (it->common.dvo_port == dvo_ports[port][j]) {
1040 DRM_DEBUG_KMS("More than one child device for port %c in VBT.\n",
1051 aux_channel = child->raw[25];
1052 ddc_pin = child->common.ddc_pin;
1054 is_dvi = child->common.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
1055 is_dp = child->common.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
1056 is_crt = child->common.device_type & DEVICE_TYPE_ANALOG_OUTPUT;
1057 is_hdmi = is_dvi && (child->common.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
1058 is_edp = is_dp && (child->common.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR);
1060 info->supports_dvi = is_dvi;
1061 info->supports_hdmi = is_hdmi;
1062 info->supports_dp = is_dp;
1064 DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n",
1065 port_name(port), is_dp, is_hdmi, is_dvi, is_edp, is_crt);
1067 if (is_edp && is_dvi)
1068 DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
1070 if (is_crt && port != PORT_E)
1071 DRM_DEBUG_KMS("Port %c is analog\n", port_name(port));
1072 if (is_crt && (is_dvi || is_dp))
1073 DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
1075 if (is_dvi && (port == PORT_A || port == PORT_E))
1076 DRM_DEBUG_KMS("Port %c is TMDS compatible\n", port_name(port));
1077 if (!is_dvi && !is_dp && !is_crt)
1078 DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
1080 if (is_edp && (port == PORT_B || port == PORT_C || port == PORT_E))
1081 DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port));
1084 if (port == PORT_E) {
1085 info->alternate_ddc_pin = ddc_pin;
1086 /* if DDIE share ddc pin with other port, then
1087 * dvi/hdmi couldn't exist on the shared port.
1088 * Otherwise they share the same ddc bin and system
1089 * couldn't communicate with them seperately. */
1090 if (ddc_pin == DDC_PIN_B) {
1091 dev_priv->vbt.ddi_port_info[PORT_B].supports_dvi = 0;
1092 dev_priv->vbt.ddi_port_info[PORT_B].supports_hdmi = 0;
1093 } else if (ddc_pin == DDC_PIN_C) {
1094 dev_priv->vbt.ddi_port_info[PORT_C].supports_dvi = 0;
1095 dev_priv->vbt.ddi_port_info[PORT_C].supports_hdmi = 0;
1096 } else if (ddc_pin == DDC_PIN_D) {
1097 dev_priv->vbt.ddi_port_info[PORT_D].supports_dvi = 0;
1098 dev_priv->vbt.ddi_port_info[PORT_D].supports_hdmi = 0;
1100 } else if (ddc_pin == DDC_PIN_B && port != PORT_B)
1101 DRM_DEBUG_KMS("Unexpected DDC pin for port B\n");
1102 else if (ddc_pin == DDC_PIN_C && port != PORT_C)
1103 DRM_DEBUG_KMS("Unexpected DDC pin for port C\n");
1104 else if (ddc_pin == DDC_PIN_D && port != PORT_D)
1105 DRM_DEBUG_KMS("Unexpected DDC pin for port D\n");
1109 if (port == PORT_E) {
1110 info->alternate_aux_channel = aux_channel;
1111 /* if DDIE share aux channel with other port, then
1112 * DP couldn't exist on the shared port. Otherwise
1113 * they share the same aux channel and system
1114 * couldn't communicate with them seperately. */
1115 if (aux_channel == DP_AUX_A)
1116 dev_priv->vbt.ddi_port_info[PORT_A].supports_dp = 0;
1117 else if (aux_channel == DP_AUX_B)
1118 dev_priv->vbt.ddi_port_info[PORT_B].supports_dp = 0;
1119 else if (aux_channel == DP_AUX_C)
1120 dev_priv->vbt.ddi_port_info[PORT_C].supports_dp = 0;
1121 else if (aux_channel == DP_AUX_D)
1122 dev_priv->vbt.ddi_port_info[PORT_D].supports_dp = 0;
1124 else if (aux_channel == DP_AUX_A && port != PORT_A)
1125 DRM_DEBUG_KMS("Unexpected AUX channel for port A\n");
1126 else if (aux_channel == DP_AUX_B && port != PORT_B)
1127 DRM_DEBUG_KMS("Unexpected AUX channel for port B\n");
1128 else if (aux_channel == DP_AUX_C && port != PORT_C)
1129 DRM_DEBUG_KMS("Unexpected AUX channel for port C\n");
1130 else if (aux_channel == DP_AUX_D && port != PORT_D)
1131 DRM_DEBUG_KMS("Unexpected AUX channel for port D\n");
1134 if (bdb->version >= 158) {
1135 /* The VBT HDMI level shift values match the table we have. */
1136 hdmi_level_shift = child->raw[7] & 0xF;
1137 DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
1140 info->hdmi_level_shift = hdmi_level_shift;
1143 /* Parse the I_boost config for SKL and above */
1144 if (bdb->version >= 196 && child->common.iboost) {
1145 info->dp_boost_level = translate_iboost(child->common.iboost_level & 0xF);
1146 DRM_DEBUG_KMS("VBT (e)DP boost level for port %c: %d\n",
1147 port_name(port), info->dp_boost_level);
1148 info->hdmi_boost_level = translate_iboost(child->common.iboost_level >> 4);
1149 DRM_DEBUG_KMS("VBT HDMI boost level for port %c: %d\n",
1150 port_name(port), info->hdmi_boost_level);
1154 static void parse_ddi_ports(struct drm_i915_private *dev_priv,
1155 const struct bdb_header *bdb)
1159 if (!HAS_DDI(dev_priv))
1162 if (!dev_priv->vbt.child_dev_num)
1165 if (bdb->version < 155)
1168 for (port = PORT_A; port < I915_MAX_PORTS; port++)
1169 parse_ddi_port(dev_priv, port, bdb);
1173 parse_device_mapping(struct drm_i915_private *dev_priv,
1174 const struct bdb_header *bdb)
1176 const struct bdb_general_definitions *p_defs;
1177 const union child_device_config *p_child;
1178 union child_device_config *child_dev_ptr;
1179 int i, child_device_num, count;
1183 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
1185 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
1188 if (bdb->version < 106) {
1190 } else if (bdb->version < 109) {
1192 } else if (bdb->version < 195) {
1193 BUILD_BUG_ON(sizeof(struct old_child_dev_config) != 33);
1194 expected_size = sizeof(struct old_child_dev_config);
1195 } else if (bdb->version == 195) {
1197 } else if (bdb->version <= 197) {
1201 BUILD_BUG_ON(sizeof(*p_child) < 38);
1202 DRM_DEBUG_DRIVER("Expected child device config size for VBT version %u not known; assuming %u\n",
1203 bdb->version, expected_size);
1206 /* Flag an error for unexpected size, but continue anyway. */
1207 if (p_defs->child_dev_size != expected_size)
1208 DRM_ERROR("Unexpected child device config size %u (expected %u for VBT version %u)\n",
1209 p_defs->child_dev_size, expected_size, bdb->version);
1211 /* The legacy sized child device config is the minimum we need. */
1212 if (p_defs->child_dev_size < sizeof(struct old_child_dev_config)) {
1213 DRM_DEBUG_KMS("Child device config size %u is too small.\n",
1214 p_defs->child_dev_size);
1218 /* get the block size of general definitions */
1219 block_size = get_blocksize(p_defs);
1220 /* get the number of child device */
1221 child_device_num = (block_size - sizeof(*p_defs)) /
1222 p_defs->child_dev_size;
1224 /* get the number of child device that is present */
1225 for (i = 0; i < child_device_num; i++) {
1226 p_child = child_device_ptr(p_defs, i);
1227 if (!p_child->common.device_type) {
1228 /* skip the device block if device type is invalid */
1234 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
1237 dev_priv->vbt.child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL);
1238 if (!dev_priv->vbt.child_dev) {
1239 DRM_DEBUG_KMS("No memory space for child device\n");
1243 dev_priv->vbt.child_dev_num = count;
1245 for (i = 0; i < child_device_num; i++) {
1246 p_child = child_device_ptr(p_defs, i);
1247 if (!p_child->common.device_type) {
1248 /* skip the device block if device type is invalid */
1252 child_dev_ptr = dev_priv->vbt.child_dev + count;
1256 * Copy as much as we know (sizeof) and is available
1257 * (child_dev_size) of the child device. Accessing the data must
1258 * depend on VBT version.
1260 memcpy(child_dev_ptr, p_child,
1261 min_t(size_t, p_defs->child_dev_size, sizeof(*p_child)));
1264 * copied full block, now init values when they are not
1265 * available in current version
1267 if (bdb->version < 196) {
1268 /* Set default values for bits added from v196 */
1269 child_dev_ptr->common.iboost = 0;
1270 child_dev_ptr->common.hpd_invert = 0;
1273 if (bdb->version < 192)
1274 child_dev_ptr->common.lspcon = 0;
1280 init_vbt_defaults(struct drm_i915_private *dev_priv)
1284 dev_priv->vbt.crt_ddc_pin = GMBUS_PIN_VGADDC;
1286 /* Default to having backlight */
1287 dev_priv->vbt.backlight.present = true;
1289 /* LFP panel data */
1290 dev_priv->vbt.lvds_dither = 1;
1291 dev_priv->vbt.lvds_vbt = 0;
1293 /* SDVO panel data */
1294 dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
1296 /* general features */
1297 dev_priv->vbt.int_tv_support = 1;
1298 dev_priv->vbt.int_crt_support = 1;
1300 /* Default to using SSC */
1301 dev_priv->vbt.lvds_use_ssc = 1;
1303 * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
1306 dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev_priv,
1307 !HAS_PCH_SPLIT(dev_priv));
1308 DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv->vbt.lvds_ssc_freq);
1310 for (port = PORT_A; port < I915_MAX_PORTS; port++) {
1311 struct ddi_vbt_port_info *info =
1312 &dev_priv->vbt.ddi_port_info[port];
1314 info->hdmi_level_shift = HDMI_LEVEL_SHIFT_UNKNOWN;
1316 info->supports_dvi = (port != PORT_A && port != PORT_E);
1317 info->supports_hdmi = info->supports_dvi;
1318 info->supports_dp = (port != PORT_E);
1322 static const struct bdb_header *get_bdb_header(const struct vbt_header *vbt)
1324 const void *_vbt = vbt;
1326 return _vbt + vbt->bdb_offset;
1330 * intel_bios_is_valid_vbt - does the given buffer contain a valid VBT
1331 * @buf: pointer to a buffer to validate
1332 * @size: size of the buffer
1334 * Returns true on valid VBT.
1336 bool intel_bios_is_valid_vbt(const void *buf, size_t size)
1338 const struct vbt_header *vbt = buf;
1339 const struct bdb_header *bdb;
1344 if (sizeof(struct vbt_header) > size) {
1345 DRM_DEBUG_DRIVER("VBT header incomplete\n");
1349 if (memcmp(vbt->signature, "$VBT", 4)) {
1350 DRM_DEBUG_DRIVER("VBT invalid signature\n");
1354 if (vbt->bdb_offset + sizeof(struct bdb_header) > size) {
1355 DRM_DEBUG_DRIVER("BDB header incomplete\n");
1359 bdb = get_bdb_header(vbt);
1360 if (vbt->bdb_offset + bdb->bdb_size > size) {
1361 DRM_DEBUG_DRIVER("BDB incomplete\n");
1368 static const struct vbt_header *find_vbt(void __iomem *bios, size_t size)
1372 /* Scour memory looking for the VBT signature. */
1373 for (i = 0; i + 4 < size; i++) {
1376 if (ioread32(bios + i) != *((const u32 *) "$VBT"))
1380 * This is the one place where we explicitly discard the address
1381 * space (__iomem) of the BIOS/VBT.
1383 vbt = (void __force *) bios + i;
1384 if (intel_bios_is_valid_vbt(vbt, size - i))
1394 * intel_bios_init - find VBT and initialize settings from the BIOS
1395 * @dev_priv: i915 device instance
1397 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
1398 * to appropriate values.
1400 * Returns 0 on success, nonzero on failure.
1403 intel_bios_init(struct drm_i915_private *dev_priv)
1405 struct pci_dev *pdev = dev_priv->dev->pdev;
1406 const struct vbt_header *vbt = dev_priv->opregion.vbt;
1407 const struct bdb_header *bdb;
1408 u8 __iomem *bios = NULL;
1410 if (HAS_PCH_NOP(dev_priv))
1413 init_vbt_defaults(dev_priv);
1418 bios = pci_map_rom(pdev, &size);
1422 vbt = find_vbt(bios, size);
1424 pci_unmap_rom(pdev, bios);
1428 DRM_DEBUG_KMS("Found valid VBT in PCI ROM\n");
1431 bdb = get_bdb_header(vbt);
1433 DRM_DEBUG_KMS("VBT signature \"%.*s\", BDB version %d\n",
1434 (int)sizeof(vbt->signature), vbt->signature, bdb->version);
1436 /* Grab useful general definitions */
1437 parse_general_features(dev_priv, bdb);
1438 parse_general_definitions(dev_priv, bdb);
1439 parse_lfp_panel_data(dev_priv, bdb);
1440 parse_lfp_backlight(dev_priv, bdb);
1441 parse_sdvo_panel_data(dev_priv, bdb);
1442 parse_sdvo_device_mapping(dev_priv, bdb);
1443 parse_device_mapping(dev_priv, bdb);
1444 parse_driver_features(dev_priv, bdb);
1445 parse_edp(dev_priv, bdb);
1446 parse_psr(dev_priv, bdb);
1447 parse_mipi_config(dev_priv, bdb);
1448 parse_mipi_sequence(dev_priv, bdb);
1449 parse_ddi_ports(dev_priv, bdb);
1452 pci_unmap_rom(pdev, bios);
1458 * intel_bios_is_tv_present - is integrated TV present in VBT
1459 * @dev_priv: i915 device instance
1461 * Return true if TV is present. If no child devices were parsed from VBT,
1462 * assume TV is present.
1464 bool intel_bios_is_tv_present(struct drm_i915_private *dev_priv)
1466 union child_device_config *p_child;
1469 if (!dev_priv->vbt.int_tv_support)
1472 if (!dev_priv->vbt.child_dev_num)
1475 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1476 p_child = dev_priv->vbt.child_dev + i;
1478 * If the device type is not TV, continue.
1480 switch (p_child->old.device_type) {
1481 case DEVICE_TYPE_INT_TV:
1482 case DEVICE_TYPE_TV:
1483 case DEVICE_TYPE_TV_SVIDEO_COMPOSITE:
1488 /* Only when the addin_offset is non-zero, it is regarded
1491 if (p_child->old.addin_offset)
1499 * intel_bios_is_lvds_present - is LVDS present in VBT
1500 * @dev_priv: i915 device instance
1501 * @i2c_pin: i2c pin for LVDS if present
1503 * Return true if LVDS is present. If no child devices were parsed from VBT,
1504 * assume LVDS is present.
1506 bool intel_bios_is_lvds_present(struct drm_i915_private *dev_priv, u8 *i2c_pin)
1510 if (!dev_priv->vbt.child_dev_num)
1513 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1514 union child_device_config *uchild = dev_priv->vbt.child_dev + i;
1515 struct old_child_dev_config *child = &uchild->old;
1517 /* If the device type is not LFP, continue.
1518 * We have to check both the new identifiers as well as the
1519 * old for compatibility with some BIOSes.
1521 if (child->device_type != DEVICE_TYPE_INT_LFP &&
1522 child->device_type != DEVICE_TYPE_LFP)
1525 if (intel_gmbus_is_valid_pin(dev_priv, child->i2c_pin))
1526 *i2c_pin = child->i2c_pin;
1528 /* However, we cannot trust the BIOS writers to populate
1529 * the VBT correctly. Since LVDS requires additional
1530 * information from AIM blocks, a non-zero addin offset is
1531 * a good indicator that the LVDS is actually present.
1533 if (child->addin_offset)
1536 /* But even then some BIOS writers perform some black magic
1537 * and instantiate the device without reference to any
1538 * additional data. Trust that if the VBT was written into
1539 * the OpRegion then they have validated the LVDS's existence.
1541 if (dev_priv->opregion.vbt)
1549 * intel_bios_is_port_edp - is the device in given port eDP
1550 * @dev_priv: i915 device instance
1551 * @port: port to check
1553 * Return true if the device in %port is eDP.
1555 bool intel_bios_is_port_edp(struct drm_i915_private *dev_priv, enum port port)
1557 union child_device_config *p_child;
1558 static const short port_mapping[] = {
1559 [PORT_B] = DVO_PORT_DPB,
1560 [PORT_C] = DVO_PORT_DPC,
1561 [PORT_D] = DVO_PORT_DPD,
1562 [PORT_E] = DVO_PORT_DPE,
1566 if (!dev_priv->vbt.child_dev_num)
1569 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1570 p_child = dev_priv->vbt.child_dev + i;
1572 if (p_child->common.dvo_port == port_mapping[port] &&
1573 (p_child->common.device_type & DEVICE_TYPE_eDP_BITS) ==
1574 (DEVICE_TYPE_eDP & DEVICE_TYPE_eDP_BITS))
1582 * intel_bios_is_dsi_present - is DSI present in VBT
1583 * @dev_priv: i915 device instance
1584 * @port: port for DSI if present
1586 * Return true if DSI is present, and return the port in %port.
1588 bool intel_bios_is_dsi_present(struct drm_i915_private *dev_priv,
1591 union child_device_config *p_child;
1595 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1596 p_child = dev_priv->vbt.child_dev + i;
1598 if (!(p_child->common.device_type & DEVICE_TYPE_MIPI_OUTPUT))
1601 dvo_port = p_child->common.dvo_port;
1604 case DVO_PORT_MIPIA:
1605 case DVO_PORT_MIPIC:
1607 *port = dvo_port - DVO_PORT_MIPIA;
1609 case DVO_PORT_MIPIB:
1610 case DVO_PORT_MIPID:
1611 DRM_DEBUG_KMS("VBT has unsupported DSI port %c\n",
1612 port_name(dvo_port - DVO_PORT_MIPIA));
1621 * intel_bios_is_port_hpd_inverted - is HPD inverted for %port
1622 * @dev_priv: i915 device instance
1623 * @port: port to check
1625 * Return true if HPD should be inverted for %port.
1628 intel_bios_is_port_hpd_inverted(struct drm_i915_private *dev_priv,
1633 if (WARN_ON_ONCE(!IS_BROXTON(dev_priv)))
1636 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1637 if (!dev_priv->vbt.child_dev[i].common.hpd_invert)
1640 switch (dev_priv->vbt.child_dev[i].common.dvo_port) {
1642 case DVO_PORT_HDMIA:
1647 case DVO_PORT_HDMIB:
1652 case DVO_PORT_HDMIC: