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_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_modparams.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_GEN(dev_priv)) {
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);
434 static const struct child_device_config *
435 child_device_ptr(const struct bdb_general_definitions *defs, int i)
437 return (const void *) &defs->devices[i * defs->child_dev_size];
441 parse_sdvo_device_mapping(struct drm_i915_private *dev_priv, u8 bdb_version)
443 struct sdvo_device_mapping *mapping;
444 const struct child_device_config *child;
448 * Only parse SDVO mappings on gens that could have SDVO. This isn't
449 * accurate and doesn't have to be, as long as it's not too strict.
451 if (!IS_GEN(dev_priv, 3, 7)) {
452 DRM_DEBUG_KMS("Skipping SDVO device mapping\n");
456 for (i = 0, count = 0; i < dev_priv->vbt.child_dev_num; i++) {
457 child = dev_priv->vbt.child_dev + i;
459 if (child->slave_addr != SLAVE_ADDR1 &&
460 child->slave_addr != SLAVE_ADDR2) {
462 * If the slave address is neither 0x70 nor 0x72,
463 * it is not a SDVO device. Skip it.
467 if (child->dvo_port != DEVICE_PORT_DVOB &&
468 child->dvo_port != DEVICE_PORT_DVOC) {
469 /* skip the incorrect SDVO port */
470 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
473 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
476 (child->dvo_port == DEVICE_PORT_DVOB) ?
478 mapping = &dev_priv->vbt.sdvo_mappings[child->dvo_port - 1];
479 if (!mapping->initialized) {
480 mapping->dvo_port = child->dvo_port;
481 mapping->slave_addr = child->slave_addr;
482 mapping->dvo_wiring = child->dvo_wiring;
483 mapping->ddc_pin = child->ddc_pin;
484 mapping->i2c_pin = child->i2c_pin;
485 mapping->initialized = 1;
486 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
493 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
494 "two SDVO device.\n");
496 if (child->slave2_addr) {
497 /* Maybe this is a SDVO device with multiple inputs */
498 /* And the mapping info is not added */
499 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
500 " is a SDVO device with multiple inputs.\n");
506 /* No SDVO device info is found */
507 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
512 parse_driver_features(struct drm_i915_private *dev_priv,
513 const struct bdb_header *bdb)
515 const struct bdb_driver_features *driver;
517 driver = find_section(bdb, BDB_DRIVER_FEATURES);
521 if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
522 dev_priv->vbt.edp.support = 1;
524 DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver->drrs_enabled);
526 * If DRRS is not supported, drrs_type has to be set to 0.
527 * This is because, VBT is configured in such a way that
528 * static DRRS is 0 and DRRS not supported is represented by
529 * driver->drrs_enabled=false
531 if (!driver->drrs_enabled)
532 dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
533 dev_priv->vbt.psr.enable = driver->psr_enabled;
537 parse_edp(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
539 const struct bdb_edp *edp;
540 const struct edp_power_seq *edp_pps;
541 const struct edp_fast_link_params *edp_link_params;
542 int panel_type = dev_priv->vbt.panel_type;
544 edp = find_section(bdb, BDB_EDP);
546 if (dev_priv->vbt.edp.support)
547 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
551 switch ((edp->color_depth >> (panel_type * 2)) & 3) {
553 dev_priv->vbt.edp.bpp = 18;
556 dev_priv->vbt.edp.bpp = 24;
559 dev_priv->vbt.edp.bpp = 30;
563 /* Get the eDP sequencing and link info */
564 edp_pps = &edp->power_seqs[panel_type];
565 edp_link_params = &edp->fast_link_params[panel_type];
567 dev_priv->vbt.edp.pps = *edp_pps;
569 switch (edp_link_params->rate) {
571 dev_priv->vbt.edp.rate = DP_LINK_BW_1_62;
574 dev_priv->vbt.edp.rate = DP_LINK_BW_2_7;
577 DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n",
578 edp_link_params->rate);
582 switch (edp_link_params->lanes) {
584 dev_priv->vbt.edp.lanes = 1;
587 dev_priv->vbt.edp.lanes = 2;
590 dev_priv->vbt.edp.lanes = 4;
593 DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n",
594 edp_link_params->lanes);
598 switch (edp_link_params->preemphasis) {
599 case EDP_PREEMPHASIS_NONE:
600 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_0;
602 case EDP_PREEMPHASIS_3_5dB:
603 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_1;
605 case EDP_PREEMPHASIS_6dB:
606 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_2;
608 case EDP_PREEMPHASIS_9_5dB:
609 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_3;
612 DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n",
613 edp_link_params->preemphasis);
617 switch (edp_link_params->vswing) {
618 case EDP_VSWING_0_4V:
619 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
621 case EDP_VSWING_0_6V:
622 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_1;
624 case EDP_VSWING_0_8V:
625 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
627 case EDP_VSWING_1_2V:
628 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
631 DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n",
632 edp_link_params->vswing);
636 if (bdb->version >= 173) {
639 /* Don't read from VBT if module parameter has valid value*/
640 if (i915_modparams.edp_vswing) {
641 dev_priv->vbt.edp.low_vswing =
642 i915_modparams.edp_vswing == 1;
644 vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF;
645 dev_priv->vbt.edp.low_vswing = vswing == 0;
651 parse_psr(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
653 const struct bdb_psr *psr;
654 const struct psr_table *psr_table;
655 int panel_type = dev_priv->vbt.panel_type;
657 psr = find_section(bdb, BDB_PSR);
659 DRM_DEBUG_KMS("No PSR BDB found.\n");
663 psr_table = &psr->psr_table[panel_type];
665 dev_priv->vbt.psr.full_link = psr_table->full_link;
666 dev_priv->vbt.psr.require_aux_wakeup = psr_table->require_aux_to_wakeup;
668 /* Allowed VBT values goes from 0 to 15 */
669 dev_priv->vbt.psr.idle_frames = psr_table->idle_frames < 0 ? 0 :
670 psr_table->idle_frames > 15 ? 15 : psr_table->idle_frames;
672 switch (psr_table->lines_to_wait) {
674 dev_priv->vbt.psr.lines_to_wait = PSR_0_LINES_TO_WAIT;
677 dev_priv->vbt.psr.lines_to_wait = PSR_1_LINE_TO_WAIT;
680 dev_priv->vbt.psr.lines_to_wait = PSR_4_LINES_TO_WAIT;
683 dev_priv->vbt.psr.lines_to_wait = PSR_8_LINES_TO_WAIT;
686 DRM_DEBUG_KMS("VBT has unknown PSR lines to wait %u\n",
687 psr_table->lines_to_wait);
691 dev_priv->vbt.psr.tp1_wakeup_time = psr_table->tp1_wakeup_time;
692 dev_priv->vbt.psr.tp2_tp3_wakeup_time = psr_table->tp2_tp3_wakeup_time;
695 static void parse_dsi_backlight_ports(struct drm_i915_private *dev_priv,
696 u16 version, enum port port)
698 if (!dev_priv->vbt.dsi.config->dual_link || version < 197) {
699 dev_priv->vbt.dsi.bl_ports = BIT(port);
700 if (dev_priv->vbt.dsi.config->cabc_supported)
701 dev_priv->vbt.dsi.cabc_ports = BIT(port);
706 switch (dev_priv->vbt.dsi.config->dl_dcs_backlight_ports) {
708 dev_priv->vbt.dsi.bl_ports = BIT(PORT_A);
711 dev_priv->vbt.dsi.bl_ports = BIT(PORT_C);
714 case DL_DCS_PORT_A_AND_C:
715 dev_priv->vbt.dsi.bl_ports = BIT(PORT_A) | BIT(PORT_C);
719 if (!dev_priv->vbt.dsi.config->cabc_supported)
722 switch (dev_priv->vbt.dsi.config->dl_dcs_cabc_ports) {
724 dev_priv->vbt.dsi.cabc_ports = BIT(PORT_A);
727 dev_priv->vbt.dsi.cabc_ports = BIT(PORT_C);
730 case DL_DCS_PORT_A_AND_C:
731 dev_priv->vbt.dsi.cabc_ports =
732 BIT(PORT_A) | BIT(PORT_C);
738 parse_mipi_config(struct drm_i915_private *dev_priv,
739 const struct bdb_header *bdb)
741 const struct bdb_mipi_config *start;
742 const struct mipi_config *config;
743 const struct mipi_pps_data *pps;
744 int panel_type = dev_priv->vbt.panel_type;
747 /* parse MIPI blocks only if LFP type is MIPI */
748 if (!intel_bios_is_dsi_present(dev_priv, &port))
751 /* Initialize this to undefined indicating no generic MIPI support */
752 dev_priv->vbt.dsi.panel_id = MIPI_DSI_UNDEFINED_PANEL_ID;
754 /* Block #40 is already parsed and panel_fixed_mode is
755 * stored in dev_priv->lfp_lvds_vbt_mode
756 * resuse this when needed
759 /* Parse #52 for panel index used from panel_type already
762 start = find_section(bdb, BDB_MIPI_CONFIG);
764 DRM_DEBUG_KMS("No MIPI config BDB found");
768 DRM_DEBUG_DRIVER("Found MIPI Config block, panel index = %d\n",
772 * get hold of the correct configuration block and pps data as per
773 * the panel_type as index
775 config = &start->config[panel_type];
776 pps = &start->pps[panel_type];
778 /* store as of now full data. Trim when we realise all is not needed */
779 dev_priv->vbt.dsi.config = kmemdup(config, sizeof(struct mipi_config), GFP_KERNEL);
780 if (!dev_priv->vbt.dsi.config)
783 dev_priv->vbt.dsi.pps = kmemdup(pps, sizeof(struct mipi_pps_data), GFP_KERNEL);
784 if (!dev_priv->vbt.dsi.pps) {
785 kfree(dev_priv->vbt.dsi.config);
789 parse_dsi_backlight_ports(dev_priv, bdb->version, port);
791 /* We have mandatory mipi config blocks. Initialize as generic panel */
792 dev_priv->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID;
795 /* Find the sequence block and size for the given panel. */
797 find_panel_sequence_block(const struct bdb_mipi_sequence *sequence,
798 u16 panel_id, u32 *seq_size)
800 u32 total = get_blocksize(sequence);
801 const u8 *data = &sequence->data[0];
804 int header_size = sequence->version >= 3 ? 5 : 3;
808 /* skip new block size */
809 if (sequence->version >= 3)
812 for (i = 0; i < MAX_MIPI_CONFIGURATIONS && index < total; i++) {
813 if (index + header_size > total) {
814 DRM_ERROR("Invalid sequence block (header)\n");
818 current_id = *(data + index);
819 if (sequence->version >= 3)
820 current_size = *((const u32 *)(data + index + 1));
822 current_size = *((const u16 *)(data + index + 1));
824 index += header_size;
826 if (index + current_size > total) {
827 DRM_ERROR("Invalid sequence block\n");
831 if (current_id == panel_id) {
832 *seq_size = current_size;
836 index += current_size;
839 DRM_ERROR("Sequence block detected but no valid configuration\n");
844 static int goto_next_sequence(const u8 *data, int index, int total)
848 /* Skip Sequence Byte. */
849 for (index = index + 1; index < total; index += len) {
850 u8 operation_byte = *(data + index);
853 switch (operation_byte) {
854 case MIPI_SEQ_ELEM_END:
856 case MIPI_SEQ_ELEM_SEND_PKT:
857 if (index + 4 > total)
860 len = *((const u16 *)(data + index + 2)) + 4;
862 case MIPI_SEQ_ELEM_DELAY:
865 case MIPI_SEQ_ELEM_GPIO:
868 case MIPI_SEQ_ELEM_I2C:
869 if (index + 7 > total)
871 len = *(data + index + 6) + 7;
874 DRM_ERROR("Unknown operation byte\n");
882 static int goto_next_sequence_v3(const u8 *data, int index, int total)
886 u32 size_of_sequence;
889 * Could skip sequence based on Size of Sequence alone, but also do some
890 * checking on the structure.
893 DRM_ERROR("Too small sequence size\n");
897 /* Skip Sequence Byte. */
901 * Size of Sequence. Excludes the Sequence Byte and the size itself,
902 * includes MIPI_SEQ_ELEM_END byte, excludes the final MIPI_SEQ_END
905 size_of_sequence = *((const uint32_t *)(data + index));
908 seq_end = index + size_of_sequence;
909 if (seq_end > total) {
910 DRM_ERROR("Invalid sequence size\n");
914 for (; index < total; index += len) {
915 u8 operation_byte = *(data + index);
918 if (operation_byte == MIPI_SEQ_ELEM_END) {
919 if (index != seq_end) {
920 DRM_ERROR("Invalid element structure\n");
926 len = *(data + index);
930 * FIXME: Would be nice to check elements like for v1/v2 in
931 * goto_next_sequence() above.
933 switch (operation_byte) {
934 case MIPI_SEQ_ELEM_SEND_PKT:
935 case MIPI_SEQ_ELEM_DELAY:
936 case MIPI_SEQ_ELEM_GPIO:
937 case MIPI_SEQ_ELEM_I2C:
938 case MIPI_SEQ_ELEM_SPI:
939 case MIPI_SEQ_ELEM_PMIC:
942 DRM_ERROR("Unknown operation byte %u\n",
952 * Get len of pre-fixed deassert fragment from a v1 init OTP sequence,
953 * skip all delay + gpio operands and stop at the first DSI packet op.
955 static int get_init_otp_deassert_fragment_len(struct drm_i915_private *dev_priv)
957 const u8 *data = dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP];
960 if (WARN_ON(!data || dev_priv->vbt.dsi.seq_version != 1))
963 /* index = 1 to skip sequence byte */
964 for (index = 1; data[index] != MIPI_SEQ_ELEM_END; index += len) {
965 switch (data[index]) {
966 case MIPI_SEQ_ELEM_SEND_PKT:
967 return index == 1 ? 0 : index;
968 case MIPI_SEQ_ELEM_DELAY:
969 len = 5; /* 1 byte for operand + uint32 */
971 case MIPI_SEQ_ELEM_GPIO:
972 len = 3; /* 1 byte for op, 1 for gpio_nr, 1 for value */
983 * Some v1 VBT MIPI sequences do the deassert in the init OTP sequence.
984 * The deassert must be done before calling intel_dsi_device_ready, so for
985 * these devices we split the init OTP sequence into a deassert sequence and
986 * the actual init OTP part.
988 static void fixup_mipi_sequences(struct drm_i915_private *dev_priv)
993 /* Limit this to VLV for now. */
994 if (!IS_VALLEYVIEW(dev_priv))
997 /* Limit this to v1 vid-mode sequences */
998 if (dev_priv->vbt.dsi.config->is_cmd_mode ||
999 dev_priv->vbt.dsi.seq_version != 1)
1002 /* Only do this if there are otp and assert seqs and no deassert seq */
1003 if (!dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP] ||
1004 !dev_priv->vbt.dsi.sequence[MIPI_SEQ_ASSERT_RESET] ||
1005 dev_priv->vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET])
1008 /* The deassert-sequence ends at the first DSI packet */
1009 len = get_init_otp_deassert_fragment_len(dev_priv);
1013 DRM_DEBUG_KMS("Using init OTP fragment to deassert reset\n");
1015 /* Copy the fragment, update seq byte and terminate it */
1016 init_otp = (u8 *)dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP];
1017 dev_priv->vbt.dsi.deassert_seq = kmemdup(init_otp, len + 1, GFP_KERNEL);
1018 if (!dev_priv->vbt.dsi.deassert_seq)
1020 dev_priv->vbt.dsi.deassert_seq[0] = MIPI_SEQ_DEASSERT_RESET;
1021 dev_priv->vbt.dsi.deassert_seq[len] = MIPI_SEQ_ELEM_END;
1022 /* Use the copy for deassert */
1023 dev_priv->vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET] =
1024 dev_priv->vbt.dsi.deassert_seq;
1025 /* Replace the last byte of the fragment with init OTP seq byte */
1026 init_otp[len - 1] = MIPI_SEQ_INIT_OTP;
1027 /* And make MIPI_MIPI_SEQ_INIT_OTP point to it */
1028 dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP] = init_otp + len - 1;
1032 parse_mipi_sequence(struct drm_i915_private *dev_priv,
1033 const struct bdb_header *bdb)
1035 int panel_type = dev_priv->vbt.panel_type;
1036 const struct bdb_mipi_sequence *sequence;
1042 /* Only our generic panel driver uses the sequence block. */
1043 if (dev_priv->vbt.dsi.panel_id != MIPI_DSI_GENERIC_PANEL_ID)
1046 sequence = find_section(bdb, BDB_MIPI_SEQUENCE);
1048 DRM_DEBUG_KMS("No MIPI Sequence found, parsing complete\n");
1052 /* Fail gracefully for forward incompatible sequence block. */
1053 if (sequence->version >= 4) {
1054 DRM_ERROR("Unable to parse MIPI Sequence Block v%u\n",
1059 DRM_DEBUG_DRIVER("Found MIPI sequence block v%u\n", sequence->version);
1061 seq_data = find_panel_sequence_block(sequence, panel_type, &seq_size);
1065 data = kmemdup(seq_data, seq_size, GFP_KERNEL);
1069 /* Parse the sequences, store pointers to each sequence. */
1071 u8 seq_id = *(data + index);
1072 if (seq_id == MIPI_SEQ_END)
1075 if (seq_id >= MIPI_SEQ_MAX) {
1076 DRM_ERROR("Unknown sequence %u\n", seq_id);
1080 /* Log about presence of sequences we won't run. */
1081 if (seq_id == MIPI_SEQ_TEAR_ON || seq_id == MIPI_SEQ_TEAR_OFF)
1082 DRM_DEBUG_KMS("Unsupported sequence %u\n", seq_id);
1084 dev_priv->vbt.dsi.sequence[seq_id] = data + index;
1086 if (sequence->version >= 3)
1087 index = goto_next_sequence_v3(data, index, seq_size);
1089 index = goto_next_sequence(data, index, seq_size);
1091 DRM_ERROR("Invalid sequence %u\n", seq_id);
1096 dev_priv->vbt.dsi.data = data;
1097 dev_priv->vbt.dsi.size = seq_size;
1098 dev_priv->vbt.dsi.seq_version = sequence->version;
1100 fixup_mipi_sequences(dev_priv);
1102 DRM_DEBUG_DRIVER("MIPI related VBT parsing complete\n");
1107 memset(dev_priv->vbt.dsi.sequence, 0, sizeof(dev_priv->vbt.dsi.sequence));
1110 static u8 translate_iboost(u8 val)
1112 static const u8 mapping[] = { 1, 3, 7 }; /* See VBT spec */
1114 if (val >= ARRAY_SIZE(mapping)) {
1115 DRM_DEBUG_KMS("Unsupported I_boost value found in VBT (%d), display may not work properly\n", val);
1118 return mapping[val];
1121 static void sanitize_ddc_pin(struct drm_i915_private *dev_priv,
1124 const struct ddi_vbt_port_info *info =
1125 &dev_priv->vbt.ddi_port_info[port];
1128 if (!info->alternate_ddc_pin)
1131 for_each_port_masked(p, (1 << port) - 1) {
1132 struct ddi_vbt_port_info *i = &dev_priv->vbt.ddi_port_info[p];
1134 if (info->alternate_ddc_pin != i->alternate_ddc_pin)
1137 DRM_DEBUG_KMS("port %c trying to use the same DDC pin (0x%x) as port %c, "
1138 "disabling port %c DVI/HDMI support\n",
1139 port_name(p), i->alternate_ddc_pin,
1140 port_name(port), port_name(p));
1143 * If we have multiple ports supposedly sharing the
1144 * pin, then dvi/hdmi couldn't exist on the shared
1145 * port. Otherwise they share the same ddc bin and
1146 * system couldn't communicate with them separately.
1148 * Due to parsing the ports in alphabetical order,
1149 * a higher port will always clobber a lower one.
1151 i->supports_dvi = false;
1152 i->supports_hdmi = false;
1153 i->alternate_ddc_pin = 0;
1157 static void sanitize_aux_ch(struct drm_i915_private *dev_priv,
1160 const struct ddi_vbt_port_info *info =
1161 &dev_priv->vbt.ddi_port_info[port];
1164 if (!info->alternate_aux_channel)
1167 for_each_port_masked(p, (1 << port) - 1) {
1168 struct ddi_vbt_port_info *i = &dev_priv->vbt.ddi_port_info[p];
1170 if (info->alternate_aux_channel != i->alternate_aux_channel)
1173 DRM_DEBUG_KMS("port %c trying to use the same AUX CH (0x%x) as port %c, "
1174 "disabling port %c DP support\n",
1175 port_name(p), i->alternate_aux_channel,
1176 port_name(port), port_name(p));
1179 * If we have multiple ports supposedlt sharing the
1180 * aux channel, then DP couldn't exist on the shared
1181 * port. Otherwise they share the same aux channel
1182 * and system couldn't communicate with them separately.
1184 * Due to parsing the ports in alphabetical order,
1185 * a higher port will always clobber a lower one.
1187 i->supports_dp = false;
1188 i->alternate_aux_channel = 0;
1192 static const u8 cnp_ddc_pin_map[] = {
1194 [DDC_BUS_DDI_B] = GMBUS_PIN_1_BXT,
1195 [DDC_BUS_DDI_C] = GMBUS_PIN_2_BXT,
1196 [DDC_BUS_DDI_D] = GMBUS_PIN_4_CNP, /* sic */
1197 [DDC_BUS_DDI_F] = GMBUS_PIN_3_BXT, /* sic */
1200 static u8 map_ddc_pin(struct drm_i915_private *dev_priv, u8 vbt_pin)
1202 if (HAS_PCH_CNP(dev_priv)) {
1203 if (vbt_pin < ARRAY_SIZE(cnp_ddc_pin_map)) {
1204 return cnp_ddc_pin_map[vbt_pin];
1206 DRM_DEBUG_KMS("Ignoring alternate pin: VBT claims DDC pin %d, which is not valid for this platform\n", vbt_pin);
1214 static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
1217 struct child_device_config *it, *child = NULL;
1218 struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port];
1220 bool is_dvi, is_hdmi, is_dp, is_edp, is_crt;
1221 /* Each DDI port can have more than one value on the "DVO Port" field,
1222 * so look for all the possible values for each port.
1224 int dvo_ports[][3] = {
1225 {DVO_PORT_HDMIA, DVO_PORT_DPA, -1},
1226 {DVO_PORT_HDMIB, DVO_PORT_DPB, -1},
1227 {DVO_PORT_HDMIC, DVO_PORT_DPC, -1},
1228 {DVO_PORT_HDMID, DVO_PORT_DPD, -1},
1229 {DVO_PORT_CRT, DVO_PORT_HDMIE, DVO_PORT_DPE},
1230 {DVO_PORT_HDMIF, DVO_PORT_DPF, -1},
1234 * Find the first child device to reference the port, report if more
1237 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1238 it = dev_priv->vbt.child_dev + i;
1240 for (j = 0; j < 3; j++) {
1241 if (dvo_ports[port][j] == -1)
1244 if (it->dvo_port == dvo_ports[port][j]) {
1246 DRM_DEBUG_KMS("More than one child device for port %c in VBT, using the first.\n",
1257 is_dvi = child->device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
1258 is_dp = child->device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
1259 is_crt = child->device_type & DEVICE_TYPE_ANALOG_OUTPUT;
1260 is_hdmi = is_dvi && (child->device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
1261 is_edp = is_dp && (child->device_type & DEVICE_TYPE_INTERNAL_CONNECTOR);
1263 if (port == PORT_A && is_dvi) {
1264 DRM_DEBUG_KMS("VBT claims port A supports DVI%s, ignoring\n",
1265 is_hdmi ? "/HDMI" : "");
1270 info->supports_dvi = is_dvi;
1271 info->supports_hdmi = is_hdmi;
1272 info->supports_dp = is_dp;
1273 info->supports_edp = is_edp;
1275 DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n",
1276 port_name(port), is_dp, is_hdmi, is_dvi, is_edp, is_crt);
1278 if (is_edp && is_dvi)
1279 DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
1281 if (is_crt && port != PORT_E)
1282 DRM_DEBUG_KMS("Port %c is analog\n", port_name(port));
1283 if (is_crt && (is_dvi || is_dp))
1284 DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
1286 if (is_dvi && (port == PORT_A || port == PORT_E))
1287 DRM_DEBUG_KMS("Port %c is TMDS compatible\n", port_name(port));
1288 if (!is_dvi && !is_dp && !is_crt)
1289 DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
1291 if (is_edp && (port == PORT_B || port == PORT_C || port == PORT_E))
1292 DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port));
1297 ddc_pin = map_ddc_pin(dev_priv, child->ddc_pin);
1298 if (intel_gmbus_is_valid_pin(dev_priv, ddc_pin)) {
1299 info->alternate_ddc_pin = ddc_pin;
1300 sanitize_ddc_pin(dev_priv, port);
1302 DRM_DEBUG_KMS("Port %c has invalid DDC pin %d, "
1303 "sticking to defaults\n",
1304 port_name(port), ddc_pin);
1309 info->alternate_aux_channel = child->aux_channel;
1311 sanitize_aux_ch(dev_priv, port);
1314 if (bdb_version >= 158) {
1315 /* The VBT HDMI level shift values match the table we have. */
1316 u8 hdmi_level_shift = child->hdmi_level_shifter_value;
1317 DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
1320 info->hdmi_level_shift = hdmi_level_shift;
1323 if (bdb_version >= 204) {
1326 switch (child->hdmi_max_data_rate) {
1328 MISSING_CASE(child->hdmi_max_data_rate);
1330 case HDMI_MAX_DATA_RATE_PLATFORM:
1333 case HDMI_MAX_DATA_RATE_297:
1334 max_tmds_clock = 297000;
1336 case HDMI_MAX_DATA_RATE_165:
1337 max_tmds_clock = 165000;
1342 DRM_DEBUG_KMS("VBT HDMI max TMDS clock for port %c: %d kHz\n",
1343 port_name(port), max_tmds_clock);
1344 info->max_tmds_clock = max_tmds_clock;
1347 /* Parse the I_boost config for SKL and above */
1348 if (bdb_version >= 196 && child->iboost) {
1349 info->dp_boost_level = translate_iboost(child->dp_iboost_level);
1350 DRM_DEBUG_KMS("VBT (e)DP boost level for port %c: %d\n",
1351 port_name(port), info->dp_boost_level);
1352 info->hdmi_boost_level = translate_iboost(child->hdmi_iboost_level);
1353 DRM_DEBUG_KMS("VBT HDMI boost level for port %c: %d\n",
1354 port_name(port), info->hdmi_boost_level);
1357 /* DP max link rate for CNL+ */
1358 if (bdb_version >= 216) {
1359 switch (child->dp_max_link_rate) {
1361 case VBT_DP_MAX_LINK_RATE_HBR3:
1362 info->dp_max_link_rate = 810000;
1364 case VBT_DP_MAX_LINK_RATE_HBR2:
1365 info->dp_max_link_rate = 540000;
1367 case VBT_DP_MAX_LINK_RATE_HBR:
1368 info->dp_max_link_rate = 270000;
1370 case VBT_DP_MAX_LINK_RATE_LBR:
1371 info->dp_max_link_rate = 162000;
1374 DRM_DEBUG_KMS("VBT DP max link rate for port %c: %d\n",
1375 port_name(port), info->dp_max_link_rate);
1379 static void parse_ddi_ports(struct drm_i915_private *dev_priv, u8 bdb_version)
1383 if (!HAS_DDI(dev_priv) && !IS_CHERRYVIEW(dev_priv))
1386 if (!dev_priv->vbt.child_dev_num)
1389 if (bdb_version < 155)
1392 for (port = PORT_A; port < I915_MAX_PORTS; port++)
1393 parse_ddi_port(dev_priv, port, bdb_version);
1397 parse_general_definitions(struct drm_i915_private *dev_priv,
1398 const struct bdb_header *bdb)
1400 const struct bdb_general_definitions *defs;
1401 const struct child_device_config *child;
1402 int i, child_device_num, count;
1407 defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
1409 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
1413 block_size = get_blocksize(defs);
1414 if (block_size < sizeof(*defs)) {
1415 DRM_DEBUG_KMS("General definitions block too small (%u)\n",
1420 bus_pin = defs->crt_ddc_gmbus_pin;
1421 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
1422 if (intel_gmbus_is_valid_pin(dev_priv, bus_pin))
1423 dev_priv->vbt.crt_ddc_pin = bus_pin;
1425 if (bdb->version < 106) {
1427 } else if (bdb->version < 111) {
1429 } else if (bdb->version < 195) {
1430 expected_size = LEGACY_CHILD_DEVICE_CONFIG_SIZE;
1431 } else if (bdb->version == 195) {
1433 } else if (bdb->version <= 215) {
1435 } else if (bdb->version <= 216) {
1438 expected_size = sizeof(*child);
1439 BUILD_BUG_ON(sizeof(*child) < 39);
1440 DRM_DEBUG_DRIVER("Expected child device config size for VBT version %u not known; assuming %u\n",
1441 bdb->version, expected_size);
1444 /* Flag an error for unexpected size, but continue anyway. */
1445 if (defs->child_dev_size != expected_size)
1446 DRM_ERROR("Unexpected child device config size %u (expected %u for VBT version %u)\n",
1447 defs->child_dev_size, expected_size, bdb->version);
1449 /* The legacy sized child device config is the minimum we need. */
1450 if (defs->child_dev_size < LEGACY_CHILD_DEVICE_CONFIG_SIZE) {
1451 DRM_DEBUG_KMS("Child device config size %u is too small.\n",
1452 defs->child_dev_size);
1456 /* get the number of child device */
1457 child_device_num = (block_size - sizeof(*defs)) / defs->child_dev_size;
1459 /* get the number of child device that is present */
1460 for (i = 0; i < child_device_num; i++) {
1461 child = child_device_ptr(defs, i);
1462 if (!child->device_type)
1467 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
1470 dev_priv->vbt.child_dev = kcalloc(count, sizeof(*child), GFP_KERNEL);
1471 if (!dev_priv->vbt.child_dev) {
1472 DRM_DEBUG_KMS("No memory space for child device\n");
1476 dev_priv->vbt.child_dev_num = count;
1478 for (i = 0; i < child_device_num; i++) {
1479 child = child_device_ptr(defs, i);
1480 if (!child->device_type)
1484 * Copy as much as we know (sizeof) and is available
1485 * (child_dev_size) of the child device. Accessing the data must
1486 * depend on VBT version.
1488 memcpy(dev_priv->vbt.child_dev + count, child,
1489 min_t(size_t, defs->child_dev_size, sizeof(*child)));
1494 /* Common defaults which may be overridden by VBT. */
1496 init_vbt_defaults(struct drm_i915_private *dev_priv)
1500 dev_priv->vbt.crt_ddc_pin = GMBUS_PIN_VGADDC;
1502 /* Default to having backlight */
1503 dev_priv->vbt.backlight.present = true;
1505 /* LFP panel data */
1506 dev_priv->vbt.lvds_dither = 1;
1507 dev_priv->vbt.lvds_vbt = 0;
1509 /* SDVO panel data */
1510 dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
1512 /* general features */
1513 dev_priv->vbt.int_tv_support = 1;
1514 dev_priv->vbt.int_crt_support = 1;
1516 /* Default to using SSC */
1517 dev_priv->vbt.lvds_use_ssc = 1;
1519 * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
1522 dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev_priv,
1523 !HAS_PCH_SPLIT(dev_priv));
1524 DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv->vbt.lvds_ssc_freq);
1526 for (port = PORT_A; port < I915_MAX_PORTS; port++) {
1527 struct ddi_vbt_port_info *info =
1528 &dev_priv->vbt.ddi_port_info[port];
1530 info->hdmi_level_shift = HDMI_LEVEL_SHIFT_UNKNOWN;
1534 /* Defaults to initialize only if there is no VBT. */
1536 init_vbt_missing_defaults(struct drm_i915_private *dev_priv)
1540 for (port = PORT_A; port < I915_MAX_PORTS; port++) {
1541 struct ddi_vbt_port_info *info =
1542 &dev_priv->vbt.ddi_port_info[port];
1544 info->supports_dvi = (port != PORT_A && port != PORT_E);
1545 info->supports_hdmi = info->supports_dvi;
1546 info->supports_dp = (port != PORT_E);
1550 static const struct bdb_header *get_bdb_header(const struct vbt_header *vbt)
1552 const void *_vbt = vbt;
1554 return _vbt + vbt->bdb_offset;
1558 * intel_bios_is_valid_vbt - does the given buffer contain a valid VBT
1559 * @buf: pointer to a buffer to validate
1560 * @size: size of the buffer
1562 * Returns true on valid VBT.
1564 bool intel_bios_is_valid_vbt(const void *buf, size_t size)
1566 const struct vbt_header *vbt = buf;
1567 const struct bdb_header *bdb;
1572 if (sizeof(struct vbt_header) > size) {
1573 DRM_DEBUG_DRIVER("VBT header incomplete\n");
1577 if (memcmp(vbt->signature, "$VBT", 4)) {
1578 DRM_DEBUG_DRIVER("VBT invalid signature\n");
1582 if (range_overflows_t(size_t,
1584 sizeof(struct bdb_header),
1586 DRM_DEBUG_DRIVER("BDB header incomplete\n");
1590 bdb = get_bdb_header(vbt);
1591 if (range_overflows_t(size_t, vbt->bdb_offset, bdb->bdb_size, size)) {
1592 DRM_DEBUG_DRIVER("BDB incomplete\n");
1599 static const struct vbt_header *find_vbt(void __iomem *bios, size_t size)
1603 /* Scour memory looking for the VBT signature. */
1604 for (i = 0; i + 4 < size; i++) {
1607 if (ioread32(bios + i) != *((const u32 *) "$VBT"))
1611 * This is the one place where we explicitly discard the address
1612 * space (__iomem) of the BIOS/VBT.
1614 vbt = (void __force *) bios + i;
1615 if (intel_bios_is_valid_vbt(vbt, size - i))
1625 * intel_bios_init - find VBT and initialize settings from the BIOS
1626 * @dev_priv: i915 device instance
1628 * Parse and initialize settings from the Video BIOS Tables (VBT). If the VBT
1629 * was not found in ACPI OpRegion, try to find it in PCI ROM first. Also
1630 * initialize some defaults if the VBT is not present at all.
1632 void intel_bios_init(struct drm_i915_private *dev_priv)
1634 struct pci_dev *pdev = dev_priv->drm.pdev;
1635 const struct vbt_header *vbt = dev_priv->opregion.vbt;
1636 const struct bdb_header *bdb;
1637 u8 __iomem *bios = NULL;
1639 if (HAS_PCH_NOP(dev_priv)) {
1640 DRM_DEBUG_KMS("Skipping VBT init due to disabled display.\n");
1644 init_vbt_defaults(dev_priv);
1646 /* If the OpRegion does not have VBT, look in PCI ROM. */
1650 bios = pci_map_rom(pdev, &size);
1654 vbt = find_vbt(bios, size);
1658 DRM_DEBUG_KMS("Found valid VBT in PCI ROM\n");
1661 bdb = get_bdb_header(vbt);
1663 DRM_DEBUG_KMS("VBT signature \"%.*s\", BDB version %d\n",
1664 (int)sizeof(vbt->signature), vbt->signature, bdb->version);
1666 /* Grab useful general definitions */
1667 parse_general_features(dev_priv, bdb);
1668 parse_general_definitions(dev_priv, bdb);
1669 parse_lfp_panel_data(dev_priv, bdb);
1670 parse_lfp_backlight(dev_priv, bdb);
1671 parse_sdvo_panel_data(dev_priv, bdb);
1672 parse_driver_features(dev_priv, bdb);
1673 parse_edp(dev_priv, bdb);
1674 parse_psr(dev_priv, bdb);
1675 parse_mipi_config(dev_priv, bdb);
1676 parse_mipi_sequence(dev_priv, bdb);
1678 /* Further processing on pre-parsed data */
1679 parse_sdvo_device_mapping(dev_priv, bdb->version);
1680 parse_ddi_ports(dev_priv, bdb->version);
1684 DRM_INFO("Failed to find VBIOS tables (VBT)\n");
1685 init_vbt_missing_defaults(dev_priv);
1689 pci_unmap_rom(pdev, bios);
1693 * intel_bios_cleanup - Free any resources allocated by intel_bios_init()
1694 * @dev_priv: i915 device instance
1696 void intel_bios_cleanup(struct drm_i915_private *dev_priv)
1698 kfree(dev_priv->vbt.child_dev);
1699 dev_priv->vbt.child_dev = NULL;
1700 dev_priv->vbt.child_dev_num = 0;
1701 kfree(dev_priv->vbt.sdvo_lvds_vbt_mode);
1702 dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
1703 kfree(dev_priv->vbt.lfp_lvds_vbt_mode);
1704 dev_priv->vbt.lfp_lvds_vbt_mode = NULL;
1705 kfree(dev_priv->vbt.dsi.data);
1706 dev_priv->vbt.dsi.data = NULL;
1707 kfree(dev_priv->vbt.dsi.pps);
1708 dev_priv->vbt.dsi.pps = NULL;
1709 kfree(dev_priv->vbt.dsi.config);
1710 dev_priv->vbt.dsi.config = NULL;
1711 kfree(dev_priv->vbt.dsi.deassert_seq);
1712 dev_priv->vbt.dsi.deassert_seq = NULL;
1716 * intel_bios_is_tv_present - is integrated TV present in VBT
1717 * @dev_priv: i915 device instance
1719 * Return true if TV is present. If no child devices were parsed from VBT,
1720 * assume TV is present.
1722 bool intel_bios_is_tv_present(struct drm_i915_private *dev_priv)
1724 const struct child_device_config *child;
1727 if (!dev_priv->vbt.int_tv_support)
1730 if (!dev_priv->vbt.child_dev_num)
1733 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1734 child = dev_priv->vbt.child_dev + i;
1736 * If the device type is not TV, continue.
1738 switch (child->device_type) {
1739 case DEVICE_TYPE_INT_TV:
1740 case DEVICE_TYPE_TV:
1741 case DEVICE_TYPE_TV_SVIDEO_COMPOSITE:
1746 /* Only when the addin_offset is non-zero, it is regarded
1749 if (child->addin_offset)
1757 * intel_bios_is_lvds_present - is LVDS present in VBT
1758 * @dev_priv: i915 device instance
1759 * @i2c_pin: i2c pin for LVDS if present
1761 * Return true if LVDS is present. If no child devices were parsed from VBT,
1762 * assume LVDS is present.
1764 bool intel_bios_is_lvds_present(struct drm_i915_private *dev_priv, u8 *i2c_pin)
1766 const struct child_device_config *child;
1769 if (!dev_priv->vbt.child_dev_num)
1772 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1773 child = dev_priv->vbt.child_dev + i;
1775 /* If the device type is not LFP, continue.
1776 * We have to check both the new identifiers as well as the
1777 * old for compatibility with some BIOSes.
1779 if (child->device_type != DEVICE_TYPE_INT_LFP &&
1780 child->device_type != DEVICE_TYPE_LFP)
1783 if (intel_gmbus_is_valid_pin(dev_priv, child->i2c_pin))
1784 *i2c_pin = child->i2c_pin;
1786 /* However, we cannot trust the BIOS writers to populate
1787 * the VBT correctly. Since LVDS requires additional
1788 * information from AIM blocks, a non-zero addin offset is
1789 * a good indicator that the LVDS is actually present.
1791 if (child->addin_offset)
1794 /* But even then some BIOS writers perform some black magic
1795 * and instantiate the device without reference to any
1796 * additional data. Trust that if the VBT was written into
1797 * the OpRegion then they have validated the LVDS's existence.
1799 if (dev_priv->opregion.vbt)
1807 * intel_bios_is_port_present - is the specified digital port present
1808 * @dev_priv: i915 device instance
1809 * @port: port to check
1811 * Return true if the device in %port is present.
1813 bool intel_bios_is_port_present(struct drm_i915_private *dev_priv, enum port port)
1815 const struct child_device_config *child;
1816 static const struct {
1818 } port_mapping[] = {
1819 [PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, },
1820 [PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, },
1821 [PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, },
1822 [PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, },
1823 [PORT_F] = { DVO_PORT_DPF, DVO_PORT_HDMIF, },
1827 /* FIXME maybe deal with port A as well? */
1828 if (WARN_ON(port == PORT_A) || port >= ARRAY_SIZE(port_mapping))
1831 if (!dev_priv->vbt.child_dev_num)
1834 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1835 child = dev_priv->vbt.child_dev + i;
1837 if ((child->dvo_port == port_mapping[port].dp ||
1838 child->dvo_port == port_mapping[port].hdmi) &&
1839 (child->device_type & (DEVICE_TYPE_TMDS_DVI_SIGNALING |
1840 DEVICE_TYPE_DISPLAYPORT_OUTPUT)))
1848 * intel_bios_is_port_edp - is the device in given port eDP
1849 * @dev_priv: i915 device instance
1850 * @port: port to check
1852 * Return true if the device in %port is eDP.
1854 bool intel_bios_is_port_edp(struct drm_i915_private *dev_priv, enum port port)
1856 const struct child_device_config *child;
1857 static const short port_mapping[] = {
1858 [PORT_B] = DVO_PORT_DPB,
1859 [PORT_C] = DVO_PORT_DPC,
1860 [PORT_D] = DVO_PORT_DPD,
1861 [PORT_E] = DVO_PORT_DPE,
1862 [PORT_F] = DVO_PORT_DPF,
1866 if (HAS_DDI(dev_priv))
1867 return dev_priv->vbt.ddi_port_info[port].supports_edp;
1869 if (!dev_priv->vbt.child_dev_num)
1872 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1873 child = dev_priv->vbt.child_dev + i;
1875 if (child->dvo_port == port_mapping[port] &&
1876 (child->device_type & DEVICE_TYPE_eDP_BITS) ==
1877 (DEVICE_TYPE_eDP & DEVICE_TYPE_eDP_BITS))
1884 static bool child_dev_is_dp_dual_mode(const struct child_device_config *child,
1887 static const struct {
1889 } port_mapping[] = {
1891 * Buggy VBTs may declare DP ports as having
1892 * HDMI type dvo_port :( So let's check both.
1894 [PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, },
1895 [PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, },
1896 [PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, },
1897 [PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, },
1898 [PORT_F] = { DVO_PORT_DPF, DVO_PORT_HDMIF, },
1901 if (port == PORT_A || port >= ARRAY_SIZE(port_mapping))
1904 if ((child->device_type & DEVICE_TYPE_DP_DUAL_MODE_BITS) !=
1905 (DEVICE_TYPE_DP_DUAL_MODE & DEVICE_TYPE_DP_DUAL_MODE_BITS))
1908 if (child->dvo_port == port_mapping[port].dp)
1911 /* Only accept a HDMI dvo_port as DP++ if it has an AUX channel */
1912 if (child->dvo_port == port_mapping[port].hdmi &&
1913 child->aux_channel != 0)
1919 bool intel_bios_is_port_dp_dual_mode(struct drm_i915_private *dev_priv,
1922 const struct child_device_config *child;
1925 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1926 child = dev_priv->vbt.child_dev + i;
1928 if (child_dev_is_dp_dual_mode(child, port))
1936 * intel_bios_is_dsi_present - is DSI present in VBT
1937 * @dev_priv: i915 device instance
1938 * @port: port for DSI if present
1940 * Return true if DSI is present, and return the port in %port.
1942 bool intel_bios_is_dsi_present(struct drm_i915_private *dev_priv,
1945 const struct child_device_config *child;
1949 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1950 child = dev_priv->vbt.child_dev + i;
1952 if (!(child->device_type & DEVICE_TYPE_MIPI_OUTPUT))
1955 dvo_port = child->dvo_port;
1958 case DVO_PORT_MIPIA:
1959 case DVO_PORT_MIPIC:
1961 *port = dvo_port - DVO_PORT_MIPIA;
1963 case DVO_PORT_MIPIB:
1964 case DVO_PORT_MIPID:
1965 DRM_DEBUG_KMS("VBT has unsupported DSI port %c\n",
1966 port_name(dvo_port - DVO_PORT_MIPIA));
1975 * intel_bios_is_port_hpd_inverted - is HPD inverted for %port
1976 * @dev_priv: i915 device instance
1977 * @port: port to check
1979 * Return true if HPD should be inverted for %port.
1982 intel_bios_is_port_hpd_inverted(struct drm_i915_private *dev_priv,
1985 const struct child_device_config *child;
1988 if (WARN_ON_ONCE(!IS_GEN9_LP(dev_priv)))
1991 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1992 child = dev_priv->vbt.child_dev + i;
1994 if (!child->hpd_invert)
1997 switch (child->dvo_port) {
1999 case DVO_PORT_HDMIA:
2004 case DVO_PORT_HDMIB:
2009 case DVO_PORT_HDMIC:
2022 * intel_bios_is_lspcon_present - if LSPCON is attached on %port
2023 * @dev_priv: i915 device instance
2024 * @port: port to check
2026 * Return true if LSPCON is present on this port
2029 intel_bios_is_lspcon_present(struct drm_i915_private *dev_priv,
2032 const struct child_device_config *child;
2035 if (!HAS_LSPCON(dev_priv))
2038 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
2039 child = dev_priv->vbt.child_dev + i;
2044 switch (child->dvo_port) {
2046 case DVO_PORT_HDMIA:
2051 case DVO_PORT_HDMIB:
2056 case DVO_PORT_HDMIC:
2061 case DVO_PORT_HDMID:
2066 case DVO_PORT_HDMIF: