2 * Copyright © 2006 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * Eric Anholt <eric@anholt.net>
28 #include <drm/drm_dp_helper.h>
30 #include <drm/i915_drm.h>
33 #define _INTEL_BIOS_PRIVATE
34 #include "intel_vbt_defs.h"
37 * DOC: Video BIOS Table (VBT)
39 * The Video BIOS Table, or VBT, provides platform and board specific
40 * configuration information to the driver that is not discoverable or available
41 * through other means. The configuration is mostly related to display
42 * hardware. The VBT is available via the ACPI OpRegion or, on older systems, in
45 * The VBT consists of a VBT Header (defined as &struct vbt_header), a BDB
46 * Header (&struct bdb_header), and a number of BIOS Data Blocks (BDB) that
47 * contain the actual configuration information. The VBT Header, and thus the
48 * VBT, begins with "$VBT" signature. The VBT Header contains the offset of the
49 * BDB Header. The data blocks are concatenated after the BDB Header. The data
50 * blocks have a 1-byte Block ID, 2-byte Block Size, and Block Size bytes of
51 * data. (Block 53, the MIPI Sequence Block is an exception.)
53 * The driver parses the VBT during load. The relevant information is stored in
54 * driver private data for ease of use, and the actual VBT is not read after
58 #define SLAVE_ADDR1 0x70
59 #define SLAVE_ADDR2 0x72
61 /* Get BDB block size given a pointer to Block ID. */
62 static u32 _get_blocksize(const u8 *block_base)
64 /* The MIPI Sequence Block v3+ has a separate size field. */
65 if (*block_base == BDB_MIPI_SEQUENCE && *(block_base + 3) >= 3)
66 return *((const u32 *)(block_base + 4));
68 return *((const u16 *)(block_base + 1));
71 /* Get BDB block size give a pointer to data after Block ID and Block Size. */
72 static u32 get_blocksize(const void *block_data)
74 return _get_blocksize(block_data - 3);
78 find_section(const void *_bdb, int section_id)
80 const struct bdb_header *bdb = _bdb;
81 const u8 *base = _bdb;
83 u32 total, current_size;
86 /* skip to first section */
87 index += bdb->header_size;
88 total = bdb->bdb_size;
90 /* walk the sections looking for section_id */
91 while (index + 3 < total) {
92 current_id = *(base + index);
93 current_size = _get_blocksize(base + index);
96 if (index + current_size > total)
99 if (current_id == section_id)
102 index += current_size;
109 fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
110 const struct lvds_dvo_timing *dvo_timing)
112 panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
113 dvo_timing->hactive_lo;
114 panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
115 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
116 panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
117 ((dvo_timing->hsync_pulse_width_hi << 8) |
118 dvo_timing->hsync_pulse_width_lo);
119 panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
120 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
122 panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
123 dvo_timing->vactive_lo;
124 panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
125 ((dvo_timing->vsync_off_hi << 4) | dvo_timing->vsync_off_lo);
126 panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
127 ((dvo_timing->vsync_pulse_width_hi << 4) |
128 dvo_timing->vsync_pulse_width_lo);
129 panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
130 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
131 panel_fixed_mode->clock = dvo_timing->clock * 10;
132 panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
134 if (dvo_timing->hsync_positive)
135 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
137 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
139 if (dvo_timing->vsync_positive)
140 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
142 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
144 panel_fixed_mode->width_mm = (dvo_timing->himage_hi << 8) |
145 dvo_timing->himage_lo;
146 panel_fixed_mode->height_mm = (dvo_timing->vimage_hi << 8) |
147 dvo_timing->vimage_lo;
149 /* Some VBTs have bogus h/vtotal values */
150 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
151 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
152 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
153 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
155 drm_mode_set_name(panel_fixed_mode);
158 static const struct lvds_dvo_timing *
159 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
160 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs,
164 * the size of fp_timing varies on the different platform.
165 * So calculate the DVO timing relative offset in LVDS data
166 * entry to get the DVO timing entry
170 lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
171 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
172 int dvo_timing_offset =
173 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
174 lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
175 char *entry = (char *)lvds_lfp_data->data + lfp_data_size * index;
177 return (struct lvds_dvo_timing *)(entry + dvo_timing_offset);
180 /* get lvds_fp_timing entry
181 * this function may return NULL if the corresponding entry is invalid
183 static const struct lvds_fp_timing *
184 get_lvds_fp_timing(const struct bdb_header *bdb,
185 const struct bdb_lvds_lfp_data *data,
186 const struct bdb_lvds_lfp_data_ptrs *ptrs,
189 size_t data_ofs = (const u8 *)data - (const u8 *)bdb;
190 u16 data_size = ((const u16 *)data)[-1]; /* stored in header */
193 if (index >= ARRAY_SIZE(ptrs->ptr))
195 ofs = ptrs->ptr[index].fp_timing_offset;
196 if (ofs < data_ofs ||
197 ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size)
199 return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs);
202 /* Try to find integrated panel data */
204 parse_lfp_panel_data(struct drm_i915_private *dev_priv,
205 const struct bdb_header *bdb)
207 const struct bdb_lvds_options *lvds_options;
208 const struct bdb_lvds_lfp_data *lvds_lfp_data;
209 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
210 const struct lvds_dvo_timing *panel_dvo_timing;
211 const struct lvds_fp_timing *fp_timing;
212 struct drm_display_mode *panel_fixed_mode;
217 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
221 dev_priv->vbt.lvds_dither = lvds_options->pixel_dither;
223 ret = intel_opregion_get_panel_type(dev_priv);
227 DRM_DEBUG_KMS("Panel type: %d (OpRegion)\n", panel_type);
229 if (lvds_options->panel_type > 0xf) {
230 DRM_DEBUG_KMS("Invalid VBT panel type 0x%x\n",
231 lvds_options->panel_type);
234 panel_type = lvds_options->panel_type;
235 DRM_DEBUG_KMS("Panel type: %d (VBT)\n", panel_type);
238 dev_priv->vbt.panel_type = panel_type;
240 drrs_mode = (lvds_options->dps_panel_type_bits
241 >> (panel_type * 2)) & MODE_MASK;
243 * VBT has static DRRS = 0 and seamless DRRS = 2.
244 * The below piece of code is required to adjust vbt.drrs_type
245 * to match the enum drrs_support_type.
249 dev_priv->vbt.drrs_type = STATIC_DRRS_SUPPORT;
250 DRM_DEBUG_KMS("DRRS supported mode is static\n");
253 dev_priv->vbt.drrs_type = SEAMLESS_DRRS_SUPPORT;
254 DRM_DEBUG_KMS("DRRS supported mode is seamless\n");
257 dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
258 DRM_DEBUG_KMS("DRRS not supported (VBT input)\n");
262 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
266 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
267 if (!lvds_lfp_data_ptrs)
270 panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
274 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
275 if (!panel_fixed_mode)
278 fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);
280 dev_priv->vbt.lfp_lvds_vbt_mode = panel_fixed_mode;
282 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
283 drm_mode_debug_printmodeline(panel_fixed_mode);
285 fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data,
289 /* check the resolution, just to be sure */
290 if (fp_timing->x_res == panel_fixed_mode->hdisplay &&
291 fp_timing->y_res == panel_fixed_mode->vdisplay) {
292 dev_priv->vbt.bios_lvds_val = fp_timing->lvds_reg_val;
293 DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
294 dev_priv->vbt.bios_lvds_val);
300 parse_lfp_backlight(struct drm_i915_private *dev_priv,
301 const struct bdb_header *bdb)
303 const struct bdb_lfp_backlight_data *backlight_data;
304 const struct bdb_lfp_backlight_data_entry *entry;
305 int panel_type = dev_priv->vbt.panel_type;
307 backlight_data = find_section(bdb, BDB_LVDS_BACKLIGHT);
311 if (backlight_data->entry_size != sizeof(backlight_data->data[0])) {
312 DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n",
313 backlight_data->entry_size);
317 entry = &backlight_data->data[panel_type];
319 dev_priv->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM;
320 if (!dev_priv->vbt.backlight.present) {
321 DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n",
326 dev_priv->vbt.backlight.type = INTEL_BACKLIGHT_DISPLAY_DDI;
327 if (bdb->version >= 191 &&
328 get_blocksize(backlight_data) >= sizeof(*backlight_data)) {
329 const struct bdb_lfp_backlight_control_method *method;
331 method = &backlight_data->backlight_control[panel_type];
332 dev_priv->vbt.backlight.type = method->type;
333 dev_priv->vbt.backlight.controller = method->controller;
336 dev_priv->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz;
337 dev_priv->vbt.backlight.active_low_pwm = entry->active_low_pwm;
338 dev_priv->vbt.backlight.min_brightness = entry->min_brightness;
339 DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, "
340 "active %s, min brightness %u, level %u, controller %u\n",
341 dev_priv->vbt.backlight.pwm_freq_hz,
342 dev_priv->vbt.backlight.active_low_pwm ? "low" : "high",
343 dev_priv->vbt.backlight.min_brightness,
344 backlight_data->level[panel_type],
345 dev_priv->vbt.backlight.controller);
348 /* Try to find sdvo panel data */
350 parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
351 const struct bdb_header *bdb)
353 const struct lvds_dvo_timing *dvo_timing;
354 struct drm_display_mode *panel_fixed_mode;
357 index = i915_modparams.vbt_sdvo_panel_type;
359 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
364 const struct bdb_sdvo_lvds_options *sdvo_lvds_options;
366 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
367 if (!sdvo_lvds_options)
370 index = sdvo_lvds_options->panel_type;
373 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
377 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
378 if (!panel_fixed_mode)
381 fill_detail_timing_data(panel_fixed_mode, dvo_timing + index);
383 dev_priv->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode;
385 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
386 drm_mode_debug_printmodeline(panel_fixed_mode);
389 static int intel_bios_ssc_frequency(struct drm_i915_private *dev_priv,
392 switch (INTEL_GEN(dev_priv)) {
394 return alternate ? 66667 : 48000;
397 return alternate ? 100000 : 96000;
399 return alternate ? 100000 : 120000;
404 parse_general_features(struct drm_i915_private *dev_priv,
405 const struct bdb_header *bdb)
407 const struct bdb_general_features *general;
409 general = find_section(bdb, BDB_GENERAL_FEATURES);
413 dev_priv->vbt.int_tv_support = general->int_tv_support;
414 /* int_crt_support can't be trusted on earlier platforms */
415 if (bdb->version >= 155 &&
416 (HAS_DDI(dev_priv) || IS_VALLEYVIEW(dev_priv)))
417 dev_priv->vbt.int_crt_support = general->int_crt_support;
418 dev_priv->vbt.lvds_use_ssc = general->enable_ssc;
419 dev_priv->vbt.lvds_ssc_freq =
420 intel_bios_ssc_frequency(dev_priv, general->ssc_freq);
421 dev_priv->vbt.display_clock_mode = general->display_clock_mode;
422 dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
423 if (bdb->version >= 181) {
424 dev_priv->vbt.orientation = general->rotate_180 ?
425 DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP :
426 DRM_MODE_PANEL_ORIENTATION_NORMAL;
428 dev_priv->vbt.orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
430 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",
431 dev_priv->vbt.int_tv_support,
432 dev_priv->vbt.int_crt_support,
433 dev_priv->vbt.lvds_use_ssc,
434 dev_priv->vbt.lvds_ssc_freq,
435 dev_priv->vbt.display_clock_mode,
436 dev_priv->vbt.fdi_rx_polarity_inverted);
439 static const struct child_device_config *
440 child_device_ptr(const struct bdb_general_definitions *defs, int i)
442 return (const void *) &defs->devices[i * defs->child_dev_size];
446 parse_sdvo_device_mapping(struct drm_i915_private *dev_priv, u8 bdb_version)
448 struct sdvo_device_mapping *mapping;
449 const struct child_device_config *child;
453 * Only parse SDVO mappings on gens that could have SDVO. This isn't
454 * accurate and doesn't have to be, as long as it's not too strict.
456 if (!IS_GEN(dev_priv, 3, 7)) {
457 DRM_DEBUG_KMS("Skipping SDVO device mapping\n");
461 for (i = 0, count = 0; i < dev_priv->vbt.child_dev_num; i++) {
462 child = dev_priv->vbt.child_dev + i;
464 if (child->slave_addr != SLAVE_ADDR1 &&
465 child->slave_addr != SLAVE_ADDR2) {
467 * If the slave address is neither 0x70 nor 0x72,
468 * it is not a SDVO device. Skip it.
472 if (child->dvo_port != DEVICE_PORT_DVOB &&
473 child->dvo_port != DEVICE_PORT_DVOC) {
474 /* skip the incorrect SDVO port */
475 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
478 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
481 (child->dvo_port == DEVICE_PORT_DVOB) ?
483 mapping = &dev_priv->vbt.sdvo_mappings[child->dvo_port - 1];
484 if (!mapping->initialized) {
485 mapping->dvo_port = child->dvo_port;
486 mapping->slave_addr = child->slave_addr;
487 mapping->dvo_wiring = child->dvo_wiring;
488 mapping->ddc_pin = child->ddc_pin;
489 mapping->i2c_pin = child->i2c_pin;
490 mapping->initialized = 1;
491 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
498 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
499 "two SDVO device.\n");
501 if (child->slave2_addr) {
502 /* Maybe this is a SDVO device with multiple inputs */
503 /* And the mapping info is not added */
504 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
505 " is a SDVO device with multiple inputs.\n");
511 /* No SDVO device info is found */
512 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
517 parse_driver_features(struct drm_i915_private *dev_priv,
518 const struct bdb_header *bdb)
520 const struct bdb_driver_features *driver;
522 driver = find_section(bdb, BDB_DRIVER_FEATURES);
526 if (INTEL_GEN(dev_priv) >= 5) {
528 * Note that we consider BDB_DRIVER_FEATURE_INT_SDVO_LVDS
529 * to mean "eDP". The VBT spec doesn't agree with that
530 * interpretation, but real world VBTs seem to.
532 if (driver->lvds_config != BDB_DRIVER_FEATURE_INT_LVDS)
533 dev_priv->vbt.int_lvds_support = 0;
536 * FIXME it's not clear which BDB version has the LVDS config
537 * bits defined. Revision history in the VBT spec says:
538 * "0.92 | Add two definitions for VBT value of LVDS Active
539 * Config (00b and 11b values defined) | 06/13/2005"
540 * but does not the specify the BDB version.
542 * So far version 134 (on i945gm) is the oldest VBT observed
543 * in the wild with the bits correctly populated. Version
544 * 108 (on i85x) does not have the bits correctly populated.
546 if (bdb->version >= 134 &&
547 driver->lvds_config != BDB_DRIVER_FEATURE_INT_LVDS &&
548 driver->lvds_config != BDB_DRIVER_FEATURE_INT_SDVO_LVDS)
549 dev_priv->vbt.int_lvds_support = 0;
552 DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver->drrs_enabled);
554 * If DRRS is not supported, drrs_type has to be set to 0.
555 * This is because, VBT is configured in such a way that
556 * static DRRS is 0 and DRRS not supported is represented by
557 * driver->drrs_enabled=false
559 if (!driver->drrs_enabled)
560 dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
561 dev_priv->vbt.psr.enable = driver->psr_enabled;
565 parse_edp(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
567 const struct bdb_edp *edp;
568 const struct edp_power_seq *edp_pps;
569 const struct edp_fast_link_params *edp_link_params;
570 int panel_type = dev_priv->vbt.panel_type;
572 edp = find_section(bdb, BDB_EDP);
576 switch ((edp->color_depth >> (panel_type * 2)) & 3) {
578 dev_priv->vbt.edp.bpp = 18;
581 dev_priv->vbt.edp.bpp = 24;
584 dev_priv->vbt.edp.bpp = 30;
588 /* Get the eDP sequencing and link info */
589 edp_pps = &edp->power_seqs[panel_type];
590 edp_link_params = &edp->fast_link_params[panel_type];
592 dev_priv->vbt.edp.pps = *edp_pps;
594 switch (edp_link_params->rate) {
596 dev_priv->vbt.edp.rate = DP_LINK_BW_1_62;
599 dev_priv->vbt.edp.rate = DP_LINK_BW_2_7;
602 DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n",
603 edp_link_params->rate);
607 switch (edp_link_params->lanes) {
609 dev_priv->vbt.edp.lanes = 1;
612 dev_priv->vbt.edp.lanes = 2;
615 dev_priv->vbt.edp.lanes = 4;
618 DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n",
619 edp_link_params->lanes);
623 switch (edp_link_params->preemphasis) {
624 case EDP_PREEMPHASIS_NONE:
625 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_0;
627 case EDP_PREEMPHASIS_3_5dB:
628 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_1;
630 case EDP_PREEMPHASIS_6dB:
631 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_2;
633 case EDP_PREEMPHASIS_9_5dB:
634 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_3;
637 DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n",
638 edp_link_params->preemphasis);
642 switch (edp_link_params->vswing) {
643 case EDP_VSWING_0_4V:
644 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
646 case EDP_VSWING_0_6V:
647 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_1;
649 case EDP_VSWING_0_8V:
650 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
652 case EDP_VSWING_1_2V:
653 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
656 DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n",
657 edp_link_params->vswing);
661 if (bdb->version >= 173) {
664 /* Don't read from VBT if module parameter has valid value*/
665 if (i915_modparams.edp_vswing) {
666 dev_priv->vbt.edp.low_vswing =
667 i915_modparams.edp_vswing == 1;
669 vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF;
670 dev_priv->vbt.edp.low_vswing = vswing == 0;
676 parse_psr(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
678 const struct bdb_psr *psr;
679 const struct psr_table *psr_table;
680 int panel_type = dev_priv->vbt.panel_type;
682 psr = find_section(bdb, BDB_PSR);
684 DRM_DEBUG_KMS("No PSR BDB found.\n");
688 psr_table = &psr->psr_table[panel_type];
690 dev_priv->vbt.psr.full_link = psr_table->full_link;
691 dev_priv->vbt.psr.require_aux_wakeup = psr_table->require_aux_to_wakeup;
693 /* Allowed VBT values goes from 0 to 15 */
694 dev_priv->vbt.psr.idle_frames = psr_table->idle_frames < 0 ? 0 :
695 psr_table->idle_frames > 15 ? 15 : psr_table->idle_frames;
697 switch (psr_table->lines_to_wait) {
699 dev_priv->vbt.psr.lines_to_wait = PSR_0_LINES_TO_WAIT;
702 dev_priv->vbt.psr.lines_to_wait = PSR_1_LINE_TO_WAIT;
705 dev_priv->vbt.psr.lines_to_wait = PSR_4_LINES_TO_WAIT;
708 dev_priv->vbt.psr.lines_to_wait = PSR_8_LINES_TO_WAIT;
711 DRM_DEBUG_KMS("VBT has unknown PSR lines to wait %u\n",
712 psr_table->lines_to_wait);
717 * New psr options 0=500us, 1=100us, 2=2500us, 3=0us
718 * Old decimal value is wake up time in multiples of 100 us.
720 if (bdb->version >= 205 &&
721 (IS_GEN9_BC(dev_priv) || IS_GEMINILAKE(dev_priv) ||
722 INTEL_GEN(dev_priv) >= 10)) {
723 switch (psr_table->tp1_wakeup_time) {
725 dev_priv->vbt.psr.tp1_wakeup_time_us = 500;
728 dev_priv->vbt.psr.tp1_wakeup_time_us = 100;
731 dev_priv->vbt.psr.tp1_wakeup_time_us = 0;
734 DRM_DEBUG_KMS("VBT tp1 wakeup time value %d is outside range[0-3], defaulting to max value 2500us\n",
735 psr_table->tp1_wakeup_time);
738 dev_priv->vbt.psr.tp1_wakeup_time_us = 2500;
742 switch (psr_table->tp2_tp3_wakeup_time) {
744 dev_priv->vbt.psr.tp2_tp3_wakeup_time_us = 500;
747 dev_priv->vbt.psr.tp2_tp3_wakeup_time_us = 100;
750 dev_priv->vbt.psr.tp2_tp3_wakeup_time_us = 0;
753 DRM_DEBUG_KMS("VBT tp2_tp3 wakeup time value %d is outside range[0-3], defaulting to max value 2500us\n",
754 psr_table->tp2_tp3_wakeup_time);
757 dev_priv->vbt.psr.tp2_tp3_wakeup_time_us = 2500;
761 dev_priv->vbt.psr.tp1_wakeup_time_us = psr_table->tp1_wakeup_time * 100;
762 dev_priv->vbt.psr.tp2_tp3_wakeup_time_us = psr_table->tp2_tp3_wakeup_time * 100;
766 static void parse_dsi_backlight_ports(struct drm_i915_private *dev_priv,
767 u16 version, enum port port)
769 if (!dev_priv->vbt.dsi.config->dual_link || version < 197) {
770 dev_priv->vbt.dsi.bl_ports = BIT(port);
771 if (dev_priv->vbt.dsi.config->cabc_supported)
772 dev_priv->vbt.dsi.cabc_ports = BIT(port);
777 switch (dev_priv->vbt.dsi.config->dl_dcs_backlight_ports) {
779 dev_priv->vbt.dsi.bl_ports = BIT(PORT_A);
782 dev_priv->vbt.dsi.bl_ports = BIT(PORT_C);
785 case DL_DCS_PORT_A_AND_C:
786 dev_priv->vbt.dsi.bl_ports = BIT(PORT_A) | BIT(PORT_C);
790 if (!dev_priv->vbt.dsi.config->cabc_supported)
793 switch (dev_priv->vbt.dsi.config->dl_dcs_cabc_ports) {
795 dev_priv->vbt.dsi.cabc_ports = BIT(PORT_A);
798 dev_priv->vbt.dsi.cabc_ports = BIT(PORT_C);
801 case DL_DCS_PORT_A_AND_C:
802 dev_priv->vbt.dsi.cabc_ports =
803 BIT(PORT_A) | BIT(PORT_C);
809 parse_mipi_config(struct drm_i915_private *dev_priv,
810 const struct bdb_header *bdb)
812 const struct bdb_mipi_config *start;
813 const struct mipi_config *config;
814 const struct mipi_pps_data *pps;
815 int panel_type = dev_priv->vbt.panel_type;
818 /* parse MIPI blocks only if LFP type is MIPI */
819 if (!intel_bios_is_dsi_present(dev_priv, &port))
822 /* Initialize this to undefined indicating no generic MIPI support */
823 dev_priv->vbt.dsi.panel_id = MIPI_DSI_UNDEFINED_PANEL_ID;
825 /* Block #40 is already parsed and panel_fixed_mode is
826 * stored in dev_priv->lfp_lvds_vbt_mode
827 * resuse this when needed
830 /* Parse #52 for panel index used from panel_type already
833 start = find_section(bdb, BDB_MIPI_CONFIG);
835 DRM_DEBUG_KMS("No MIPI config BDB found");
839 DRM_DEBUG_DRIVER("Found MIPI Config block, panel index = %d\n",
843 * get hold of the correct configuration block and pps data as per
844 * the panel_type as index
846 config = &start->config[panel_type];
847 pps = &start->pps[panel_type];
849 /* store as of now full data. Trim when we realise all is not needed */
850 dev_priv->vbt.dsi.config = kmemdup(config, sizeof(struct mipi_config), GFP_KERNEL);
851 if (!dev_priv->vbt.dsi.config)
854 dev_priv->vbt.dsi.pps = kmemdup(pps, sizeof(struct mipi_pps_data), GFP_KERNEL);
855 if (!dev_priv->vbt.dsi.pps) {
856 kfree(dev_priv->vbt.dsi.config);
860 parse_dsi_backlight_ports(dev_priv, bdb->version, port);
862 /* FIXME is the 90 vs. 270 correct? */
863 switch (config->rotation) {
864 case ENABLE_ROTATION_0:
866 * Most (all?) VBTs claim 0 degrees despite having
867 * an upside down panel, thus we do not trust this.
869 dev_priv->vbt.dsi.orientation =
870 DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
872 case ENABLE_ROTATION_90:
873 dev_priv->vbt.dsi.orientation =
874 DRM_MODE_PANEL_ORIENTATION_RIGHT_UP;
876 case ENABLE_ROTATION_180:
877 dev_priv->vbt.dsi.orientation =
878 DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP;
880 case ENABLE_ROTATION_270:
881 dev_priv->vbt.dsi.orientation =
882 DRM_MODE_PANEL_ORIENTATION_LEFT_UP;
886 /* We have mandatory mipi config blocks. Initialize as generic panel */
887 dev_priv->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID;
890 /* Find the sequence block and size for the given panel. */
892 find_panel_sequence_block(const struct bdb_mipi_sequence *sequence,
893 u16 panel_id, u32 *seq_size)
895 u32 total = get_blocksize(sequence);
896 const u8 *data = &sequence->data[0];
899 int header_size = sequence->version >= 3 ? 5 : 3;
903 /* skip new block size */
904 if (sequence->version >= 3)
907 for (i = 0; i < MAX_MIPI_CONFIGURATIONS && index < total; i++) {
908 if (index + header_size > total) {
909 DRM_ERROR("Invalid sequence block (header)\n");
913 current_id = *(data + index);
914 if (sequence->version >= 3)
915 current_size = *((const u32 *)(data + index + 1));
917 current_size = *((const u16 *)(data + index + 1));
919 index += header_size;
921 if (index + current_size > total) {
922 DRM_ERROR("Invalid sequence block\n");
926 if (current_id == panel_id) {
927 *seq_size = current_size;
931 index += current_size;
934 DRM_ERROR("Sequence block detected but no valid configuration\n");
939 static int goto_next_sequence(const u8 *data, int index, int total)
943 /* Skip Sequence Byte. */
944 for (index = index + 1; index < total; index += len) {
945 u8 operation_byte = *(data + index);
948 switch (operation_byte) {
949 case MIPI_SEQ_ELEM_END:
951 case MIPI_SEQ_ELEM_SEND_PKT:
952 if (index + 4 > total)
955 len = *((const u16 *)(data + index + 2)) + 4;
957 case MIPI_SEQ_ELEM_DELAY:
960 case MIPI_SEQ_ELEM_GPIO:
963 case MIPI_SEQ_ELEM_I2C:
964 if (index + 7 > total)
966 len = *(data + index + 6) + 7;
969 DRM_ERROR("Unknown operation byte\n");
977 static int goto_next_sequence_v3(const u8 *data, int index, int total)
981 u32 size_of_sequence;
984 * Could skip sequence based on Size of Sequence alone, but also do some
985 * checking on the structure.
988 DRM_ERROR("Too small sequence size\n");
992 /* Skip Sequence Byte. */
996 * Size of Sequence. Excludes the Sequence Byte and the size itself,
997 * includes MIPI_SEQ_ELEM_END byte, excludes the final MIPI_SEQ_END
1000 size_of_sequence = *((const u32 *)(data + index));
1003 seq_end = index + size_of_sequence;
1004 if (seq_end > total) {
1005 DRM_ERROR("Invalid sequence size\n");
1009 for (; index < total; index += len) {
1010 u8 operation_byte = *(data + index);
1013 if (operation_byte == MIPI_SEQ_ELEM_END) {
1014 if (index != seq_end) {
1015 DRM_ERROR("Invalid element structure\n");
1021 len = *(data + index);
1025 * FIXME: Would be nice to check elements like for v1/v2 in
1026 * goto_next_sequence() above.
1028 switch (operation_byte) {
1029 case MIPI_SEQ_ELEM_SEND_PKT:
1030 case MIPI_SEQ_ELEM_DELAY:
1031 case MIPI_SEQ_ELEM_GPIO:
1032 case MIPI_SEQ_ELEM_I2C:
1033 case MIPI_SEQ_ELEM_SPI:
1034 case MIPI_SEQ_ELEM_PMIC:
1037 DRM_ERROR("Unknown operation byte %u\n",
1047 * Get len of pre-fixed deassert fragment from a v1 init OTP sequence,
1048 * skip all delay + gpio operands and stop at the first DSI packet op.
1050 static int get_init_otp_deassert_fragment_len(struct drm_i915_private *dev_priv)
1052 const u8 *data = dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP];
1055 if (WARN_ON(!data || dev_priv->vbt.dsi.seq_version != 1))
1058 /* index = 1 to skip sequence byte */
1059 for (index = 1; data[index] != MIPI_SEQ_ELEM_END; index += len) {
1060 switch (data[index]) {
1061 case MIPI_SEQ_ELEM_SEND_PKT:
1062 return index == 1 ? 0 : index;
1063 case MIPI_SEQ_ELEM_DELAY:
1064 len = 5; /* 1 byte for operand + uint32 */
1066 case MIPI_SEQ_ELEM_GPIO:
1067 len = 3; /* 1 byte for op, 1 for gpio_nr, 1 for value */
1078 * Some v1 VBT MIPI sequences do the deassert in the init OTP sequence.
1079 * The deassert must be done before calling intel_dsi_device_ready, so for
1080 * these devices we split the init OTP sequence into a deassert sequence and
1081 * the actual init OTP part.
1083 static void fixup_mipi_sequences(struct drm_i915_private *dev_priv)
1088 /* Limit this to VLV for now. */
1089 if (!IS_VALLEYVIEW(dev_priv))
1092 /* Limit this to v1 vid-mode sequences */
1093 if (dev_priv->vbt.dsi.config->is_cmd_mode ||
1094 dev_priv->vbt.dsi.seq_version != 1)
1097 /* Only do this if there are otp and assert seqs and no deassert seq */
1098 if (!dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP] ||
1099 !dev_priv->vbt.dsi.sequence[MIPI_SEQ_ASSERT_RESET] ||
1100 dev_priv->vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET])
1103 /* The deassert-sequence ends at the first DSI packet */
1104 len = get_init_otp_deassert_fragment_len(dev_priv);
1108 DRM_DEBUG_KMS("Using init OTP fragment to deassert reset\n");
1110 /* Copy the fragment, update seq byte and terminate it */
1111 init_otp = (u8 *)dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP];
1112 dev_priv->vbt.dsi.deassert_seq = kmemdup(init_otp, len + 1, GFP_KERNEL);
1113 if (!dev_priv->vbt.dsi.deassert_seq)
1115 dev_priv->vbt.dsi.deassert_seq[0] = MIPI_SEQ_DEASSERT_RESET;
1116 dev_priv->vbt.dsi.deassert_seq[len] = MIPI_SEQ_ELEM_END;
1117 /* Use the copy for deassert */
1118 dev_priv->vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET] =
1119 dev_priv->vbt.dsi.deassert_seq;
1120 /* Replace the last byte of the fragment with init OTP seq byte */
1121 init_otp[len - 1] = MIPI_SEQ_INIT_OTP;
1122 /* And make MIPI_MIPI_SEQ_INIT_OTP point to it */
1123 dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP] = init_otp + len - 1;
1127 parse_mipi_sequence(struct drm_i915_private *dev_priv,
1128 const struct bdb_header *bdb)
1130 int panel_type = dev_priv->vbt.panel_type;
1131 const struct bdb_mipi_sequence *sequence;
1137 /* Only our generic panel driver uses the sequence block. */
1138 if (dev_priv->vbt.dsi.panel_id != MIPI_DSI_GENERIC_PANEL_ID)
1141 sequence = find_section(bdb, BDB_MIPI_SEQUENCE);
1143 DRM_DEBUG_KMS("No MIPI Sequence found, parsing complete\n");
1147 /* Fail gracefully for forward incompatible sequence block. */
1148 if (sequence->version >= 4) {
1149 DRM_ERROR("Unable to parse MIPI Sequence Block v%u\n",
1154 DRM_DEBUG_DRIVER("Found MIPI sequence block v%u\n", sequence->version);
1156 seq_data = find_panel_sequence_block(sequence, panel_type, &seq_size);
1160 data = kmemdup(seq_data, seq_size, GFP_KERNEL);
1164 /* Parse the sequences, store pointers to each sequence. */
1166 u8 seq_id = *(data + index);
1167 if (seq_id == MIPI_SEQ_END)
1170 if (seq_id >= MIPI_SEQ_MAX) {
1171 DRM_ERROR("Unknown sequence %u\n", seq_id);
1175 /* Log about presence of sequences we won't run. */
1176 if (seq_id == MIPI_SEQ_TEAR_ON || seq_id == MIPI_SEQ_TEAR_OFF)
1177 DRM_DEBUG_KMS("Unsupported sequence %u\n", seq_id);
1179 dev_priv->vbt.dsi.sequence[seq_id] = data + index;
1181 if (sequence->version >= 3)
1182 index = goto_next_sequence_v3(data, index, seq_size);
1184 index = goto_next_sequence(data, index, seq_size);
1186 DRM_ERROR("Invalid sequence %u\n", seq_id);
1191 dev_priv->vbt.dsi.data = data;
1192 dev_priv->vbt.dsi.size = seq_size;
1193 dev_priv->vbt.dsi.seq_version = sequence->version;
1195 fixup_mipi_sequences(dev_priv);
1197 DRM_DEBUG_DRIVER("MIPI related VBT parsing complete\n");
1202 memset(dev_priv->vbt.dsi.sequence, 0, sizeof(dev_priv->vbt.dsi.sequence));
1205 static u8 translate_iboost(u8 val)
1207 static const u8 mapping[] = { 1, 3, 7 }; /* See VBT spec */
1209 if (val >= ARRAY_SIZE(mapping)) {
1210 DRM_DEBUG_KMS("Unsupported I_boost value found in VBT (%d), display may not work properly\n", val);
1213 return mapping[val];
1216 static void sanitize_ddc_pin(struct drm_i915_private *dev_priv,
1219 const struct ddi_vbt_port_info *info =
1220 &dev_priv->vbt.ddi_port_info[port];
1223 if (!info->alternate_ddc_pin)
1226 for_each_port_masked(p, (1 << port) - 1) {
1227 struct ddi_vbt_port_info *i = &dev_priv->vbt.ddi_port_info[p];
1229 if (info->alternate_ddc_pin != i->alternate_ddc_pin)
1232 DRM_DEBUG_KMS("port %c trying to use the same DDC pin (0x%x) as port %c, "
1233 "disabling port %c DVI/HDMI support\n",
1234 port_name(p), i->alternate_ddc_pin,
1235 port_name(port), port_name(p));
1238 * If we have multiple ports supposedly sharing the
1239 * pin, then dvi/hdmi couldn't exist on the shared
1240 * port. Otherwise they share the same ddc bin and
1241 * system couldn't communicate with them separately.
1243 * Due to parsing the ports in alphabetical order,
1244 * a higher port will always clobber a lower one.
1246 i->supports_dvi = false;
1247 i->supports_hdmi = false;
1248 i->alternate_ddc_pin = 0;
1252 static void sanitize_aux_ch(struct drm_i915_private *dev_priv,
1255 const struct ddi_vbt_port_info *info =
1256 &dev_priv->vbt.ddi_port_info[port];
1259 if (!info->alternate_aux_channel)
1262 for_each_port_masked(p, (1 << port) - 1) {
1263 struct ddi_vbt_port_info *i = &dev_priv->vbt.ddi_port_info[p];
1265 if (info->alternate_aux_channel != i->alternate_aux_channel)
1268 DRM_DEBUG_KMS("port %c trying to use the same AUX CH (0x%x) as port %c, "
1269 "disabling port %c DP support\n",
1270 port_name(p), i->alternate_aux_channel,
1271 port_name(port), port_name(p));
1274 * If we have multiple ports supposedlt sharing the
1275 * aux channel, then DP couldn't exist on the shared
1276 * port. Otherwise they share the same aux channel
1277 * and system couldn't communicate with them separately.
1279 * Due to parsing the ports in alphabetical order,
1280 * a higher port will always clobber a lower one.
1282 i->supports_dp = false;
1283 i->alternate_aux_channel = 0;
1287 static const u8 cnp_ddc_pin_map[] = {
1289 [DDC_BUS_DDI_B] = GMBUS_PIN_1_BXT,
1290 [DDC_BUS_DDI_C] = GMBUS_PIN_2_BXT,
1291 [DDC_BUS_DDI_D] = GMBUS_PIN_4_CNP, /* sic */
1292 [DDC_BUS_DDI_F] = GMBUS_PIN_3_BXT, /* sic */
1295 static const u8 icp_ddc_pin_map[] = {
1296 [ICL_DDC_BUS_DDI_A] = GMBUS_PIN_1_BXT,
1297 [ICL_DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
1298 [ICL_DDC_BUS_PORT_1] = GMBUS_PIN_9_TC1_ICP,
1299 [ICL_DDC_BUS_PORT_2] = GMBUS_PIN_10_TC2_ICP,
1300 [ICL_DDC_BUS_PORT_3] = GMBUS_PIN_11_TC3_ICP,
1301 [ICL_DDC_BUS_PORT_4] = GMBUS_PIN_12_TC4_ICP,
1304 static u8 map_ddc_pin(struct drm_i915_private *dev_priv, u8 vbt_pin)
1306 const u8 *ddc_pin_map;
1309 if (HAS_PCH_ICP(dev_priv)) {
1310 ddc_pin_map = icp_ddc_pin_map;
1311 n_entries = ARRAY_SIZE(icp_ddc_pin_map);
1312 } else if (HAS_PCH_CNP(dev_priv)) {
1313 ddc_pin_map = cnp_ddc_pin_map;
1314 n_entries = ARRAY_SIZE(cnp_ddc_pin_map);
1316 /* Assuming direct map */
1320 if (vbt_pin < n_entries && ddc_pin_map[vbt_pin] != 0)
1321 return ddc_pin_map[vbt_pin];
1323 DRM_DEBUG_KMS("Ignoring alternate pin: VBT claims DDC pin %d, which is not valid for this platform\n",
1328 static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
1331 struct child_device_config *it, *child = NULL;
1332 struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port];
1334 bool is_dvi, is_hdmi, is_dp, is_edp, is_crt;
1335 /* Each DDI port can have more than one value on the "DVO Port" field,
1336 * so look for all the possible values for each port.
1338 int dvo_ports[][3] = {
1339 {DVO_PORT_HDMIA, DVO_PORT_DPA, -1},
1340 {DVO_PORT_HDMIB, DVO_PORT_DPB, -1},
1341 {DVO_PORT_HDMIC, DVO_PORT_DPC, -1},
1342 {DVO_PORT_HDMID, DVO_PORT_DPD, -1},
1343 {DVO_PORT_CRT, DVO_PORT_HDMIE, DVO_PORT_DPE},
1344 {DVO_PORT_HDMIF, DVO_PORT_DPF, -1},
1348 * Find the first child device to reference the port, report if more
1351 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1352 it = dev_priv->vbt.child_dev + i;
1354 for (j = 0; j < 3; j++) {
1355 if (dvo_ports[port][j] == -1)
1358 if (it->dvo_port == dvo_ports[port][j]) {
1360 DRM_DEBUG_KMS("More than one child device for port %c in VBT, using the first.\n",
1371 is_dvi = child->device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
1372 is_dp = child->device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
1373 is_crt = child->device_type & DEVICE_TYPE_ANALOG_OUTPUT;
1374 is_hdmi = is_dvi && (child->device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
1375 is_edp = is_dp && (child->device_type & DEVICE_TYPE_INTERNAL_CONNECTOR);
1377 if (port == PORT_A && is_dvi) {
1378 DRM_DEBUG_KMS("VBT claims port A supports DVI%s, ignoring\n",
1379 is_hdmi ? "/HDMI" : "");
1384 info->supports_dvi = is_dvi;
1385 info->supports_hdmi = is_hdmi;
1386 info->supports_dp = is_dp;
1387 info->supports_edp = is_edp;
1389 DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n",
1390 port_name(port), is_dp, is_hdmi, is_dvi, is_edp, is_crt);
1392 if (is_edp && is_dvi)
1393 DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
1395 if (is_crt && port != PORT_E)
1396 DRM_DEBUG_KMS("Port %c is analog\n", port_name(port));
1397 if (is_crt && (is_dvi || is_dp))
1398 DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
1400 if (is_dvi && (port == PORT_A || port == PORT_E))
1401 DRM_DEBUG_KMS("Port %c is TMDS compatible\n", port_name(port));
1402 if (!is_dvi && !is_dp && !is_crt)
1403 DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
1405 if (is_edp && (port == PORT_B || port == PORT_C || port == PORT_E))
1406 DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port));
1411 ddc_pin = map_ddc_pin(dev_priv, child->ddc_pin);
1412 if (intel_gmbus_is_valid_pin(dev_priv, ddc_pin)) {
1413 info->alternate_ddc_pin = ddc_pin;
1414 sanitize_ddc_pin(dev_priv, port);
1416 DRM_DEBUG_KMS("Port %c has invalid DDC pin %d, "
1417 "sticking to defaults\n",
1418 port_name(port), ddc_pin);
1423 info->alternate_aux_channel = child->aux_channel;
1425 sanitize_aux_ch(dev_priv, port);
1428 if (bdb_version >= 158) {
1429 /* The VBT HDMI level shift values match the table we have. */
1430 u8 hdmi_level_shift = child->hdmi_level_shifter_value;
1431 DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
1434 info->hdmi_level_shift = hdmi_level_shift;
1437 if (bdb_version >= 204) {
1440 switch (child->hdmi_max_data_rate) {
1442 MISSING_CASE(child->hdmi_max_data_rate);
1444 case HDMI_MAX_DATA_RATE_PLATFORM:
1447 case HDMI_MAX_DATA_RATE_297:
1448 max_tmds_clock = 297000;
1450 case HDMI_MAX_DATA_RATE_165:
1451 max_tmds_clock = 165000;
1456 DRM_DEBUG_KMS("VBT HDMI max TMDS clock for port %c: %d kHz\n",
1457 port_name(port), max_tmds_clock);
1458 info->max_tmds_clock = max_tmds_clock;
1461 /* Parse the I_boost config for SKL and above */
1462 if (bdb_version >= 196 && child->iboost) {
1463 info->dp_boost_level = translate_iboost(child->dp_iboost_level);
1464 DRM_DEBUG_KMS("VBT (e)DP boost level for port %c: %d\n",
1465 port_name(port), info->dp_boost_level);
1466 info->hdmi_boost_level = translate_iboost(child->hdmi_iboost_level);
1467 DRM_DEBUG_KMS("VBT HDMI boost level for port %c: %d\n",
1468 port_name(port), info->hdmi_boost_level);
1471 /* DP max link rate for CNL+ */
1472 if (bdb_version >= 216) {
1473 switch (child->dp_max_link_rate) {
1475 case VBT_DP_MAX_LINK_RATE_HBR3:
1476 info->dp_max_link_rate = 810000;
1478 case VBT_DP_MAX_LINK_RATE_HBR2:
1479 info->dp_max_link_rate = 540000;
1481 case VBT_DP_MAX_LINK_RATE_HBR:
1482 info->dp_max_link_rate = 270000;
1484 case VBT_DP_MAX_LINK_RATE_LBR:
1485 info->dp_max_link_rate = 162000;
1488 DRM_DEBUG_KMS("VBT DP max link rate for port %c: %d\n",
1489 port_name(port), info->dp_max_link_rate);
1493 static void parse_ddi_ports(struct drm_i915_private *dev_priv, u8 bdb_version)
1497 if (!HAS_DDI(dev_priv) && !IS_CHERRYVIEW(dev_priv))
1500 if (!dev_priv->vbt.child_dev_num)
1503 if (bdb_version < 155)
1506 for (port = PORT_A; port < I915_MAX_PORTS; port++)
1507 parse_ddi_port(dev_priv, port, bdb_version);
1511 parse_general_definitions(struct drm_i915_private *dev_priv,
1512 const struct bdb_header *bdb)
1514 const struct bdb_general_definitions *defs;
1515 const struct child_device_config *child;
1516 int i, child_device_num, count;
1521 defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
1523 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
1527 block_size = get_blocksize(defs);
1528 if (block_size < sizeof(*defs)) {
1529 DRM_DEBUG_KMS("General definitions block too small (%u)\n",
1534 bus_pin = defs->crt_ddc_gmbus_pin;
1535 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
1536 if (intel_gmbus_is_valid_pin(dev_priv, bus_pin))
1537 dev_priv->vbt.crt_ddc_pin = bus_pin;
1539 if (bdb->version < 106) {
1541 } else if (bdb->version < 111) {
1543 } else if (bdb->version < 195) {
1544 expected_size = LEGACY_CHILD_DEVICE_CONFIG_SIZE;
1545 } else if (bdb->version == 195) {
1547 } else if (bdb->version <= 215) {
1549 } else if (bdb->version <= 216) {
1552 expected_size = sizeof(*child);
1553 BUILD_BUG_ON(sizeof(*child) < 39);
1554 DRM_DEBUG_DRIVER("Expected child device config size for VBT version %u not known; assuming %u\n",
1555 bdb->version, expected_size);
1558 /* Flag an error for unexpected size, but continue anyway. */
1559 if (defs->child_dev_size != expected_size)
1560 DRM_ERROR("Unexpected child device config size %u (expected %u for VBT version %u)\n",
1561 defs->child_dev_size, expected_size, bdb->version);
1563 /* The legacy sized child device config is the minimum we need. */
1564 if (defs->child_dev_size < LEGACY_CHILD_DEVICE_CONFIG_SIZE) {
1565 DRM_DEBUG_KMS("Child device config size %u is too small.\n",
1566 defs->child_dev_size);
1570 /* get the number of child device */
1571 child_device_num = (block_size - sizeof(*defs)) / defs->child_dev_size;
1573 /* get the number of child device that is present */
1574 for (i = 0; i < child_device_num; i++) {
1575 child = child_device_ptr(defs, i);
1576 if (!child->device_type)
1581 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
1584 dev_priv->vbt.child_dev = kcalloc(count, sizeof(*child), GFP_KERNEL);
1585 if (!dev_priv->vbt.child_dev) {
1586 DRM_DEBUG_KMS("No memory space for child device\n");
1590 dev_priv->vbt.child_dev_num = count;
1592 for (i = 0; i < child_device_num; i++) {
1593 child = child_device_ptr(defs, i);
1594 if (!child->device_type)
1598 * Copy as much as we know (sizeof) and is available
1599 * (child_dev_size) of the child device. Accessing the data must
1600 * depend on VBT version.
1602 memcpy(dev_priv->vbt.child_dev + count, child,
1603 min_t(size_t, defs->child_dev_size, sizeof(*child)));
1608 /* Common defaults which may be overridden by VBT. */
1610 init_vbt_defaults(struct drm_i915_private *dev_priv)
1614 dev_priv->vbt.crt_ddc_pin = GMBUS_PIN_VGADDC;
1616 /* Default to having backlight */
1617 dev_priv->vbt.backlight.present = true;
1619 /* LFP panel data */
1620 dev_priv->vbt.lvds_dither = 1;
1622 /* SDVO panel data */
1623 dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
1625 /* general features */
1626 dev_priv->vbt.int_tv_support = 1;
1627 dev_priv->vbt.int_crt_support = 1;
1629 /* driver features */
1630 dev_priv->vbt.int_lvds_support = 1;
1632 /* Default to using SSC */
1633 dev_priv->vbt.lvds_use_ssc = 1;
1635 * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
1638 dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev_priv,
1639 !HAS_PCH_SPLIT(dev_priv));
1640 DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv->vbt.lvds_ssc_freq);
1642 for (port = PORT_A; port < I915_MAX_PORTS; port++) {
1643 struct ddi_vbt_port_info *info =
1644 &dev_priv->vbt.ddi_port_info[port];
1646 info->hdmi_level_shift = HDMI_LEVEL_SHIFT_UNKNOWN;
1650 /* Defaults to initialize only if there is no VBT. */
1652 init_vbt_missing_defaults(struct drm_i915_private *dev_priv)
1656 for (port = PORT_A; port < I915_MAX_PORTS; port++) {
1657 struct ddi_vbt_port_info *info =
1658 &dev_priv->vbt.ddi_port_info[port];
1660 info->supports_dvi = (port != PORT_A && port != PORT_E);
1661 info->supports_hdmi = info->supports_dvi;
1662 info->supports_dp = (port != PORT_E);
1666 static const struct bdb_header *get_bdb_header(const struct vbt_header *vbt)
1668 const void *_vbt = vbt;
1670 return _vbt + vbt->bdb_offset;
1674 * intel_bios_is_valid_vbt - does the given buffer contain a valid VBT
1675 * @buf: pointer to a buffer to validate
1676 * @size: size of the buffer
1678 * Returns true on valid VBT.
1680 bool intel_bios_is_valid_vbt(const void *buf, size_t size)
1682 const struct vbt_header *vbt = buf;
1683 const struct bdb_header *bdb;
1688 if (sizeof(struct vbt_header) > size) {
1689 DRM_DEBUG_DRIVER("VBT header incomplete\n");
1693 if (memcmp(vbt->signature, "$VBT", 4)) {
1694 DRM_DEBUG_DRIVER("VBT invalid signature\n");
1698 if (range_overflows_t(size_t,
1700 sizeof(struct bdb_header),
1702 DRM_DEBUG_DRIVER("BDB header incomplete\n");
1706 bdb = get_bdb_header(vbt);
1707 if (range_overflows_t(size_t, vbt->bdb_offset, bdb->bdb_size, size)) {
1708 DRM_DEBUG_DRIVER("BDB incomplete\n");
1715 static const struct vbt_header *find_vbt(void __iomem *bios, size_t size)
1719 /* Scour memory looking for the VBT signature. */
1720 for (i = 0; i + 4 < size; i++) {
1723 if (ioread32(bios + i) != *((const u32 *) "$VBT"))
1727 * This is the one place where we explicitly discard the address
1728 * space (__iomem) of the BIOS/VBT.
1730 vbt = (void __force *) bios + i;
1731 if (intel_bios_is_valid_vbt(vbt, size - i))
1741 * intel_bios_init - find VBT and initialize settings from the BIOS
1742 * @dev_priv: i915 device instance
1744 * Parse and initialize settings from the Video BIOS Tables (VBT). If the VBT
1745 * was not found in ACPI OpRegion, try to find it in PCI ROM first. Also
1746 * initialize some defaults if the VBT is not present at all.
1748 void intel_bios_init(struct drm_i915_private *dev_priv)
1750 struct pci_dev *pdev = dev_priv->drm.pdev;
1751 const struct vbt_header *vbt = dev_priv->opregion.vbt;
1752 const struct bdb_header *bdb;
1753 u8 __iomem *bios = NULL;
1755 if (!HAS_DISPLAY(dev_priv)) {
1756 DRM_DEBUG_KMS("Skipping VBT init due to disabled display.\n");
1760 init_vbt_defaults(dev_priv);
1762 /* If the OpRegion does not have VBT, look in PCI ROM. */
1766 bios = pci_map_rom(pdev, &size);
1770 vbt = find_vbt(bios, size);
1774 DRM_DEBUG_KMS("Found valid VBT in PCI ROM\n");
1777 bdb = get_bdb_header(vbt);
1779 DRM_DEBUG_KMS("VBT signature \"%.*s\", BDB version %d\n",
1780 (int)sizeof(vbt->signature), vbt->signature, bdb->version);
1782 /* Grab useful general definitions */
1783 parse_general_features(dev_priv, bdb);
1784 parse_general_definitions(dev_priv, bdb);
1785 parse_lfp_panel_data(dev_priv, bdb);
1786 parse_lfp_backlight(dev_priv, bdb);
1787 parse_sdvo_panel_data(dev_priv, bdb);
1788 parse_driver_features(dev_priv, bdb);
1789 parse_edp(dev_priv, bdb);
1790 parse_psr(dev_priv, bdb);
1791 parse_mipi_config(dev_priv, bdb);
1792 parse_mipi_sequence(dev_priv, bdb);
1794 /* Further processing on pre-parsed data */
1795 parse_sdvo_device_mapping(dev_priv, bdb->version);
1796 parse_ddi_ports(dev_priv, bdb->version);
1800 DRM_INFO("Failed to find VBIOS tables (VBT)\n");
1801 init_vbt_missing_defaults(dev_priv);
1805 pci_unmap_rom(pdev, bios);
1809 * intel_bios_cleanup - Free any resources allocated by intel_bios_init()
1810 * @dev_priv: i915 device instance
1812 void intel_bios_cleanup(struct drm_i915_private *dev_priv)
1814 kfree(dev_priv->vbt.child_dev);
1815 dev_priv->vbt.child_dev = NULL;
1816 dev_priv->vbt.child_dev_num = 0;
1817 kfree(dev_priv->vbt.sdvo_lvds_vbt_mode);
1818 dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
1819 kfree(dev_priv->vbt.lfp_lvds_vbt_mode);
1820 dev_priv->vbt.lfp_lvds_vbt_mode = NULL;
1821 kfree(dev_priv->vbt.dsi.data);
1822 dev_priv->vbt.dsi.data = NULL;
1823 kfree(dev_priv->vbt.dsi.pps);
1824 dev_priv->vbt.dsi.pps = NULL;
1825 kfree(dev_priv->vbt.dsi.config);
1826 dev_priv->vbt.dsi.config = NULL;
1827 kfree(dev_priv->vbt.dsi.deassert_seq);
1828 dev_priv->vbt.dsi.deassert_seq = NULL;
1832 * intel_bios_is_tv_present - is integrated TV present in VBT
1833 * @dev_priv: i915 device instance
1835 * Return true if TV is present. If no child devices were parsed from VBT,
1836 * assume TV is present.
1838 bool intel_bios_is_tv_present(struct drm_i915_private *dev_priv)
1840 const struct child_device_config *child;
1843 if (!dev_priv->vbt.int_tv_support)
1846 if (!dev_priv->vbt.child_dev_num)
1849 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1850 child = dev_priv->vbt.child_dev + i;
1852 * If the device type is not TV, continue.
1854 switch (child->device_type) {
1855 case DEVICE_TYPE_INT_TV:
1856 case DEVICE_TYPE_TV:
1857 case DEVICE_TYPE_TV_SVIDEO_COMPOSITE:
1862 /* Only when the addin_offset is non-zero, it is regarded
1865 if (child->addin_offset)
1873 * intel_bios_is_lvds_present - is LVDS present in VBT
1874 * @dev_priv: i915 device instance
1875 * @i2c_pin: i2c pin for LVDS if present
1877 * Return true if LVDS is present. If no child devices were parsed from VBT,
1878 * assume LVDS is present.
1880 bool intel_bios_is_lvds_present(struct drm_i915_private *dev_priv, u8 *i2c_pin)
1882 const struct child_device_config *child;
1885 if (!dev_priv->vbt.child_dev_num)
1888 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1889 child = dev_priv->vbt.child_dev + i;
1891 /* If the device type is not LFP, continue.
1892 * We have to check both the new identifiers as well as the
1893 * old for compatibility with some BIOSes.
1895 if (child->device_type != DEVICE_TYPE_INT_LFP &&
1896 child->device_type != DEVICE_TYPE_LFP)
1899 if (intel_gmbus_is_valid_pin(dev_priv, child->i2c_pin))
1900 *i2c_pin = child->i2c_pin;
1902 /* However, we cannot trust the BIOS writers to populate
1903 * the VBT correctly. Since LVDS requires additional
1904 * information from AIM blocks, a non-zero addin offset is
1905 * a good indicator that the LVDS is actually present.
1907 if (child->addin_offset)
1910 /* But even then some BIOS writers perform some black magic
1911 * and instantiate the device without reference to any
1912 * additional data. Trust that if the VBT was written into
1913 * the OpRegion then they have validated the LVDS's existence.
1915 if (dev_priv->opregion.vbt)
1923 * intel_bios_is_port_present - is the specified digital port present
1924 * @dev_priv: i915 device instance
1925 * @port: port to check
1927 * Return true if the device in %port is present.
1929 bool intel_bios_is_port_present(struct drm_i915_private *dev_priv, enum port port)
1931 const struct child_device_config *child;
1932 static const struct {
1934 } port_mapping[] = {
1935 [PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, },
1936 [PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, },
1937 [PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, },
1938 [PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, },
1939 [PORT_F] = { DVO_PORT_DPF, DVO_PORT_HDMIF, },
1943 /* FIXME maybe deal with port A as well? */
1944 if (WARN_ON(port == PORT_A) || port >= ARRAY_SIZE(port_mapping))
1947 if (!dev_priv->vbt.child_dev_num)
1950 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1951 child = dev_priv->vbt.child_dev + i;
1953 if ((child->dvo_port == port_mapping[port].dp ||
1954 child->dvo_port == port_mapping[port].hdmi) &&
1955 (child->device_type & (DEVICE_TYPE_TMDS_DVI_SIGNALING |
1956 DEVICE_TYPE_DISPLAYPORT_OUTPUT)))
1964 * intel_bios_is_port_edp - is the device in given port eDP
1965 * @dev_priv: i915 device instance
1966 * @port: port to check
1968 * Return true if the device in %port is eDP.
1970 bool intel_bios_is_port_edp(struct drm_i915_private *dev_priv, enum port port)
1972 const struct child_device_config *child;
1973 static const short port_mapping[] = {
1974 [PORT_B] = DVO_PORT_DPB,
1975 [PORT_C] = DVO_PORT_DPC,
1976 [PORT_D] = DVO_PORT_DPD,
1977 [PORT_E] = DVO_PORT_DPE,
1978 [PORT_F] = DVO_PORT_DPF,
1982 if (HAS_DDI(dev_priv))
1983 return dev_priv->vbt.ddi_port_info[port].supports_edp;
1985 if (!dev_priv->vbt.child_dev_num)
1988 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1989 child = dev_priv->vbt.child_dev + i;
1991 if (child->dvo_port == port_mapping[port] &&
1992 (child->device_type & DEVICE_TYPE_eDP_BITS) ==
1993 (DEVICE_TYPE_eDP & DEVICE_TYPE_eDP_BITS))
2000 static bool child_dev_is_dp_dual_mode(const struct child_device_config *child,
2003 static const struct {
2005 } port_mapping[] = {
2007 * Buggy VBTs may declare DP ports as having
2008 * HDMI type dvo_port :( So let's check both.
2010 [PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, },
2011 [PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, },
2012 [PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, },
2013 [PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, },
2014 [PORT_F] = { DVO_PORT_DPF, DVO_PORT_HDMIF, },
2017 if (port == PORT_A || port >= ARRAY_SIZE(port_mapping))
2020 if ((child->device_type & DEVICE_TYPE_DP_DUAL_MODE_BITS) !=
2021 (DEVICE_TYPE_DP_DUAL_MODE & DEVICE_TYPE_DP_DUAL_MODE_BITS))
2024 if (child->dvo_port == port_mapping[port].dp)
2027 /* Only accept a HDMI dvo_port as DP++ if it has an AUX channel */
2028 if (child->dvo_port == port_mapping[port].hdmi &&
2029 child->aux_channel != 0)
2035 bool intel_bios_is_port_dp_dual_mode(struct drm_i915_private *dev_priv,
2038 const struct child_device_config *child;
2041 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
2042 child = dev_priv->vbt.child_dev + i;
2044 if (child_dev_is_dp_dual_mode(child, port))
2052 * intel_bios_is_dsi_present - is DSI present in VBT
2053 * @dev_priv: i915 device instance
2054 * @port: port for DSI if present
2056 * Return true if DSI is present, and return the port in %port.
2058 bool intel_bios_is_dsi_present(struct drm_i915_private *dev_priv,
2061 const struct child_device_config *child;
2065 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
2066 child = dev_priv->vbt.child_dev + i;
2068 if (!(child->device_type & DEVICE_TYPE_MIPI_OUTPUT))
2071 dvo_port = child->dvo_port;
2073 if (dvo_port == DVO_PORT_MIPIA ||
2074 (dvo_port == DVO_PORT_MIPIB && IS_ICELAKE(dev_priv)) ||
2075 (dvo_port == DVO_PORT_MIPIC && !IS_ICELAKE(dev_priv))) {
2077 *port = dvo_port - DVO_PORT_MIPIA;
2079 } else if (dvo_port == DVO_PORT_MIPIB ||
2080 dvo_port == DVO_PORT_MIPIC ||
2081 dvo_port == DVO_PORT_MIPID) {
2082 DRM_DEBUG_KMS("VBT has unsupported DSI port %c\n",
2083 port_name(dvo_port - DVO_PORT_MIPIA));
2091 * intel_bios_is_port_hpd_inverted - is HPD inverted for %port
2092 * @dev_priv: i915 device instance
2093 * @port: port to check
2095 * Return true if HPD should be inverted for %port.
2098 intel_bios_is_port_hpd_inverted(struct drm_i915_private *dev_priv,
2101 const struct child_device_config *child;
2104 if (WARN_ON_ONCE(!IS_GEN9_LP(dev_priv)))
2107 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
2108 child = dev_priv->vbt.child_dev + i;
2110 if (!child->hpd_invert)
2113 switch (child->dvo_port) {
2115 case DVO_PORT_HDMIA:
2120 case DVO_PORT_HDMIB:
2125 case DVO_PORT_HDMIC:
2138 * intel_bios_is_lspcon_present - if LSPCON is attached on %port
2139 * @dev_priv: i915 device instance
2140 * @port: port to check
2142 * Return true if LSPCON is present on this port
2145 intel_bios_is_lspcon_present(struct drm_i915_private *dev_priv,
2148 const struct child_device_config *child;
2151 if (!HAS_LSPCON(dev_priv))
2154 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
2155 child = dev_priv->vbt.child_dev + i;
2160 switch (child->dvo_port) {
2162 case DVO_PORT_HDMIA:
2167 case DVO_PORT_HDMIB:
2172 case DVO_PORT_HDMIC:
2177 case DVO_PORT_HDMID:
2182 case DVO_PORT_HDMIF:
2194 enum aux_ch intel_bios_port_aux_ch(struct drm_i915_private *dev_priv,
2197 const struct ddi_vbt_port_info *info =
2198 &dev_priv->vbt.ddi_port_info[port];
2201 if (!info->alternate_aux_channel) {
2202 aux_ch = (enum aux_ch)port;
2204 DRM_DEBUG_KMS("using AUX %c for port %c (platform default)\n",
2205 aux_ch_name(aux_ch), port_name(port));
2209 switch (info->alternate_aux_channel) {
2229 MISSING_CASE(info->alternate_aux_channel);
2234 DRM_DEBUG_KMS("using AUX %c for port %c (VBT)\n",
2235 aux_ch_name(aux_ch), port_name(port));