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>
29 #include <drm/i915_drm.h>
31 #include "display/intel_gmbus.h"
35 #define _INTEL_BIOS_PRIVATE
36 #include "intel_vbt_defs.h"
39 * DOC: Video BIOS Table (VBT)
41 * The Video BIOS Table, or VBT, provides platform and board specific
42 * configuration information to the driver that is not discoverable or available
43 * through other means. The configuration is mostly related to display
44 * hardware. The VBT is available via the ACPI OpRegion or, on older systems, in
47 * The VBT consists of a VBT Header (defined as &struct vbt_header), a BDB
48 * Header (&struct bdb_header), and a number of BIOS Data Blocks (BDB) that
49 * contain the actual configuration information. The VBT Header, and thus the
50 * VBT, begins with "$VBT" signature. The VBT Header contains the offset of the
51 * BDB Header. The data blocks are concatenated after the BDB Header. The data
52 * blocks have a 1-byte Block ID, 2-byte Block Size, and Block Size bytes of
53 * data. (Block 53, the MIPI Sequence Block is an exception.)
55 * The driver parses the VBT during load. The relevant information is stored in
56 * driver private data for ease of use, and the actual VBT is not read after
60 #define SLAVE_ADDR1 0x70
61 #define SLAVE_ADDR2 0x72
63 /* Get BDB block size given a pointer to Block ID. */
64 static u32 _get_blocksize(const u8 *block_base)
66 /* The MIPI Sequence Block v3+ has a separate size field. */
67 if (*block_base == BDB_MIPI_SEQUENCE && *(block_base + 3) >= 3)
68 return *((const u32 *)(block_base + 4));
70 return *((const u16 *)(block_base + 1));
73 /* Get BDB block size give a pointer to data after Block ID and Block Size. */
74 static u32 get_blocksize(const void *block_data)
76 return _get_blocksize(block_data - 3);
80 find_section(const void *_bdb, enum bdb_block_id section_id)
82 const struct bdb_header *bdb = _bdb;
83 const u8 *base = _bdb;
85 u32 total, current_size;
86 enum bdb_block_id current_id;
88 /* skip to first section */
89 index += bdb->header_size;
90 total = bdb->bdb_size;
92 /* walk the sections looking for section_id */
93 while (index + 3 < total) {
94 current_id = *(base + index);
95 current_size = _get_blocksize(base + index);
98 if (index + current_size > total)
101 if (current_id == section_id)
104 index += current_size;
111 fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
112 const struct lvds_dvo_timing *dvo_timing)
114 panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
115 dvo_timing->hactive_lo;
116 panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
117 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
118 panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
119 ((dvo_timing->hsync_pulse_width_hi << 8) |
120 dvo_timing->hsync_pulse_width_lo);
121 panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
122 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
124 panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
125 dvo_timing->vactive_lo;
126 panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
127 ((dvo_timing->vsync_off_hi << 4) | dvo_timing->vsync_off_lo);
128 panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
129 ((dvo_timing->vsync_pulse_width_hi << 4) |
130 dvo_timing->vsync_pulse_width_lo);
131 panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
132 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
133 panel_fixed_mode->clock = dvo_timing->clock * 10;
134 panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
136 if (dvo_timing->hsync_positive)
137 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
139 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
141 if (dvo_timing->vsync_positive)
142 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
144 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
146 panel_fixed_mode->width_mm = (dvo_timing->himage_hi << 8) |
147 dvo_timing->himage_lo;
148 panel_fixed_mode->height_mm = (dvo_timing->vimage_hi << 8) |
149 dvo_timing->vimage_lo;
151 /* Some VBTs have bogus h/vtotal values */
152 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
153 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
154 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
155 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
157 drm_mode_set_name(panel_fixed_mode);
160 static const struct lvds_dvo_timing *
161 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
162 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs,
166 * the size of fp_timing varies on the different platform.
167 * So calculate the DVO timing relative offset in LVDS data
168 * entry to get the DVO timing entry
172 lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
173 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
174 int dvo_timing_offset =
175 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
176 lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
177 char *entry = (char *)lvds_lfp_data->data + lfp_data_size * index;
179 return (struct lvds_dvo_timing *)(entry + dvo_timing_offset);
182 /* get lvds_fp_timing entry
183 * this function may return NULL if the corresponding entry is invalid
185 static const struct lvds_fp_timing *
186 get_lvds_fp_timing(const struct bdb_header *bdb,
187 const struct bdb_lvds_lfp_data *data,
188 const struct bdb_lvds_lfp_data_ptrs *ptrs,
191 size_t data_ofs = (const u8 *)data - (const u8 *)bdb;
192 u16 data_size = ((const u16 *)data)[-1]; /* stored in header */
195 if (index >= ARRAY_SIZE(ptrs->ptr))
197 ofs = ptrs->ptr[index].fp_timing_offset;
198 if (ofs < data_ofs ||
199 ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size)
201 return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs);
204 /* Try to find integrated panel data */
206 parse_lfp_panel_data(struct drm_i915_private *dev_priv,
207 const struct bdb_header *bdb)
209 const struct bdb_lvds_options *lvds_options;
210 const struct bdb_lvds_lfp_data *lvds_lfp_data;
211 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
212 const struct lvds_dvo_timing *panel_dvo_timing;
213 const struct lvds_fp_timing *fp_timing;
214 struct drm_display_mode *panel_fixed_mode;
219 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
223 dev_priv->vbt.lvds_dither = lvds_options->pixel_dither;
225 ret = intel_opregion_get_panel_type(dev_priv);
229 DRM_DEBUG_KMS("Panel type: %d (OpRegion)\n", panel_type);
231 if (lvds_options->panel_type > 0xf) {
232 DRM_DEBUG_KMS("Invalid VBT panel type 0x%x\n",
233 lvds_options->panel_type);
236 panel_type = lvds_options->panel_type;
237 DRM_DEBUG_KMS("Panel type: %d (VBT)\n", panel_type);
240 dev_priv->vbt.panel_type = panel_type;
242 drrs_mode = (lvds_options->dps_panel_type_bits
243 >> (panel_type * 2)) & MODE_MASK;
245 * VBT has static DRRS = 0 and seamless DRRS = 2.
246 * The below piece of code is required to adjust vbt.drrs_type
247 * to match the enum drrs_support_type.
251 dev_priv->vbt.drrs_type = STATIC_DRRS_SUPPORT;
252 DRM_DEBUG_KMS("DRRS supported mode is static\n");
255 dev_priv->vbt.drrs_type = SEAMLESS_DRRS_SUPPORT;
256 DRM_DEBUG_KMS("DRRS supported mode is seamless\n");
259 dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
260 DRM_DEBUG_KMS("DRRS not supported (VBT input)\n");
264 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
268 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
269 if (!lvds_lfp_data_ptrs)
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 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 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 bdb_sdvo_panel_dtds *dtds;
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 dtds = 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, &dtds->dtds[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 if (bdb->version >= 181) {
426 dev_priv->vbt.orientation = general->rotate_180 ?
427 DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP :
428 DRM_MODE_PANEL_ORIENTATION_NORMAL;
430 dev_priv->vbt.orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
432 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",
433 dev_priv->vbt.int_tv_support,
434 dev_priv->vbt.int_crt_support,
435 dev_priv->vbt.lvds_use_ssc,
436 dev_priv->vbt.lvds_ssc_freq,
437 dev_priv->vbt.display_clock_mode,
438 dev_priv->vbt.fdi_rx_polarity_inverted);
441 static const struct child_device_config *
442 child_device_ptr(const struct bdb_general_definitions *defs, int i)
444 return (const void *) &defs->devices[i * defs->child_dev_size];
448 parse_sdvo_device_mapping(struct drm_i915_private *dev_priv, u8 bdb_version)
450 struct sdvo_device_mapping *mapping;
451 const struct child_device_config *child;
455 * Only parse SDVO mappings on gens that could have SDVO. This isn't
456 * accurate and doesn't have to be, as long as it's not too strict.
458 if (!IS_GEN_RANGE(dev_priv, 3, 7)) {
459 DRM_DEBUG_KMS("Skipping SDVO device mapping\n");
463 for (i = 0, count = 0; i < dev_priv->vbt.child_dev_num; i++) {
464 child = dev_priv->vbt.child_dev + i;
466 if (child->slave_addr != SLAVE_ADDR1 &&
467 child->slave_addr != SLAVE_ADDR2) {
469 * If the slave address is neither 0x70 nor 0x72,
470 * it is not a SDVO device. Skip it.
474 if (child->dvo_port != DEVICE_PORT_DVOB &&
475 child->dvo_port != DEVICE_PORT_DVOC) {
476 /* skip the incorrect SDVO port */
477 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
480 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
483 (child->dvo_port == DEVICE_PORT_DVOB) ?
485 mapping = &dev_priv->vbt.sdvo_mappings[child->dvo_port - 1];
486 if (!mapping->initialized) {
487 mapping->dvo_port = child->dvo_port;
488 mapping->slave_addr = child->slave_addr;
489 mapping->dvo_wiring = child->dvo_wiring;
490 mapping->ddc_pin = child->ddc_pin;
491 mapping->i2c_pin = child->i2c_pin;
492 mapping->initialized = 1;
493 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
500 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
501 "two SDVO device.\n");
503 if (child->slave2_addr) {
504 /* Maybe this is a SDVO device with multiple inputs */
505 /* And the mapping info is not added */
506 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
507 " is a SDVO device with multiple inputs.\n");
513 /* No SDVO device info is found */
514 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
519 parse_driver_features(struct drm_i915_private *dev_priv,
520 const struct bdb_header *bdb)
522 const struct bdb_driver_features *driver;
524 driver = find_section(bdb, BDB_DRIVER_FEATURES);
528 if (INTEL_GEN(dev_priv) >= 5) {
530 * Note that we consider BDB_DRIVER_FEATURE_INT_SDVO_LVDS
531 * to mean "eDP". The VBT spec doesn't agree with that
532 * interpretation, but real world VBTs seem to.
534 if (driver->lvds_config != BDB_DRIVER_FEATURE_INT_LVDS)
535 dev_priv->vbt.int_lvds_support = 0;
538 * FIXME it's not clear which BDB version has the LVDS config
539 * bits defined. Revision history in the VBT spec says:
540 * "0.92 | Add two definitions for VBT value of LVDS Active
541 * Config (00b and 11b values defined) | 06/13/2005"
542 * but does not the specify the BDB version.
544 * So far version 134 (on i945gm) is the oldest VBT observed
545 * in the wild with the bits correctly populated. Version
546 * 108 (on i85x) does not have the bits correctly populated.
548 if (bdb->version >= 134 &&
549 driver->lvds_config != BDB_DRIVER_FEATURE_INT_LVDS &&
550 driver->lvds_config != BDB_DRIVER_FEATURE_INT_SDVO_LVDS)
551 dev_priv->vbt.int_lvds_support = 0;
554 DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver->drrs_enabled);
556 * If DRRS is not supported, drrs_type has to be set to 0.
557 * This is because, VBT is configured in such a way that
558 * static DRRS is 0 and DRRS not supported is represented by
559 * driver->drrs_enabled=false
561 if (!driver->drrs_enabled)
562 dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
563 dev_priv->vbt.psr.enable = driver->psr_enabled;
567 parse_edp(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
569 const struct bdb_edp *edp;
570 const struct edp_power_seq *edp_pps;
571 const struct edp_fast_link_params *edp_link_params;
572 int panel_type = dev_priv->vbt.panel_type;
574 edp = find_section(bdb, BDB_EDP);
578 switch ((edp->color_depth >> (panel_type * 2)) & 3) {
580 dev_priv->vbt.edp.bpp = 18;
583 dev_priv->vbt.edp.bpp = 24;
586 dev_priv->vbt.edp.bpp = 30;
590 /* Get the eDP sequencing and link info */
591 edp_pps = &edp->power_seqs[panel_type];
592 edp_link_params = &edp->fast_link_params[panel_type];
594 dev_priv->vbt.edp.pps = *edp_pps;
596 switch (edp_link_params->rate) {
598 dev_priv->vbt.edp.rate = DP_LINK_BW_1_62;
601 dev_priv->vbt.edp.rate = DP_LINK_BW_2_7;
604 DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n",
605 edp_link_params->rate);
609 switch (edp_link_params->lanes) {
611 dev_priv->vbt.edp.lanes = 1;
614 dev_priv->vbt.edp.lanes = 2;
617 dev_priv->vbt.edp.lanes = 4;
620 DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n",
621 edp_link_params->lanes);
625 switch (edp_link_params->preemphasis) {
626 case EDP_PREEMPHASIS_NONE:
627 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_0;
629 case EDP_PREEMPHASIS_3_5dB:
630 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_1;
632 case EDP_PREEMPHASIS_6dB:
633 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_2;
635 case EDP_PREEMPHASIS_9_5dB:
636 dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_3;
639 DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n",
640 edp_link_params->preemphasis);
644 switch (edp_link_params->vswing) {
645 case EDP_VSWING_0_4V:
646 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
648 case EDP_VSWING_0_6V:
649 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_1;
651 case EDP_VSWING_0_8V:
652 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
654 case EDP_VSWING_1_2V:
655 dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
658 DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n",
659 edp_link_params->vswing);
663 if (bdb->version >= 173) {
666 /* Don't read from VBT if module parameter has valid value*/
667 if (i915_modparams.edp_vswing) {
668 dev_priv->vbt.edp.low_vswing =
669 i915_modparams.edp_vswing == 1;
671 vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF;
672 dev_priv->vbt.edp.low_vswing = vswing == 0;
678 parse_psr(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
680 const struct bdb_psr *psr;
681 const struct psr_table *psr_table;
682 int panel_type = dev_priv->vbt.panel_type;
684 psr = find_section(bdb, BDB_PSR);
686 DRM_DEBUG_KMS("No PSR BDB found.\n");
690 psr_table = &psr->psr_table[panel_type];
692 dev_priv->vbt.psr.full_link = psr_table->full_link;
693 dev_priv->vbt.psr.require_aux_wakeup = psr_table->require_aux_to_wakeup;
695 /* Allowed VBT values goes from 0 to 15 */
696 dev_priv->vbt.psr.idle_frames = psr_table->idle_frames < 0 ? 0 :
697 psr_table->idle_frames > 15 ? 15 : psr_table->idle_frames;
699 switch (psr_table->lines_to_wait) {
701 dev_priv->vbt.psr.lines_to_wait = PSR_0_LINES_TO_WAIT;
704 dev_priv->vbt.psr.lines_to_wait = PSR_1_LINE_TO_WAIT;
707 dev_priv->vbt.psr.lines_to_wait = PSR_4_LINES_TO_WAIT;
710 dev_priv->vbt.psr.lines_to_wait = PSR_8_LINES_TO_WAIT;
713 DRM_DEBUG_KMS("VBT has unknown PSR lines to wait %u\n",
714 psr_table->lines_to_wait);
719 * New psr options 0=500us, 1=100us, 2=2500us, 3=0us
720 * Old decimal value is wake up time in multiples of 100 us.
722 if (bdb->version >= 205 &&
723 (IS_GEN9_BC(dev_priv) || IS_GEMINILAKE(dev_priv) ||
724 INTEL_GEN(dev_priv) >= 10)) {
725 switch (psr_table->tp1_wakeup_time) {
727 dev_priv->vbt.psr.tp1_wakeup_time_us = 500;
730 dev_priv->vbt.psr.tp1_wakeup_time_us = 100;
733 dev_priv->vbt.psr.tp1_wakeup_time_us = 0;
736 DRM_DEBUG_KMS("VBT tp1 wakeup time value %d is outside range[0-3], defaulting to max value 2500us\n",
737 psr_table->tp1_wakeup_time);
740 dev_priv->vbt.psr.tp1_wakeup_time_us = 2500;
744 switch (psr_table->tp2_tp3_wakeup_time) {
746 dev_priv->vbt.psr.tp2_tp3_wakeup_time_us = 500;
749 dev_priv->vbt.psr.tp2_tp3_wakeup_time_us = 100;
752 dev_priv->vbt.psr.tp2_tp3_wakeup_time_us = 0;
755 DRM_DEBUG_KMS("VBT tp2_tp3 wakeup time value %d is outside range[0-3], defaulting to max value 2500us\n",
756 psr_table->tp2_tp3_wakeup_time);
759 dev_priv->vbt.psr.tp2_tp3_wakeup_time_us = 2500;
763 dev_priv->vbt.psr.tp1_wakeup_time_us = psr_table->tp1_wakeup_time * 100;
764 dev_priv->vbt.psr.tp2_tp3_wakeup_time_us = psr_table->tp2_tp3_wakeup_time * 100;
767 if (bdb->version >= 226) {
768 u32 wakeup_time = psr_table->psr2_tp2_tp3_wakeup_time;
770 wakeup_time = (wakeup_time >> (2 * panel_type)) & 0x3;
771 switch (wakeup_time) {
786 dev_priv->vbt.psr.psr2_tp2_tp3_wakeup_time_us = wakeup_time;
788 /* Reusing PSR1 wakeup time for PSR2 in older VBTs */
789 dev_priv->vbt.psr.psr2_tp2_tp3_wakeup_time_us = dev_priv->vbt.psr.tp2_tp3_wakeup_time_us;
793 static void parse_dsi_backlight_ports(struct drm_i915_private *dev_priv,
794 u16 version, enum port port)
796 if (!dev_priv->vbt.dsi.config->dual_link || version < 197) {
797 dev_priv->vbt.dsi.bl_ports = BIT(port);
798 if (dev_priv->vbt.dsi.config->cabc_supported)
799 dev_priv->vbt.dsi.cabc_ports = BIT(port);
804 switch (dev_priv->vbt.dsi.config->dl_dcs_backlight_ports) {
806 dev_priv->vbt.dsi.bl_ports = BIT(PORT_A);
809 dev_priv->vbt.dsi.bl_ports = BIT(PORT_C);
812 case DL_DCS_PORT_A_AND_C:
813 dev_priv->vbt.dsi.bl_ports = BIT(PORT_A) | BIT(PORT_C);
817 if (!dev_priv->vbt.dsi.config->cabc_supported)
820 switch (dev_priv->vbt.dsi.config->dl_dcs_cabc_ports) {
822 dev_priv->vbt.dsi.cabc_ports = BIT(PORT_A);
825 dev_priv->vbt.dsi.cabc_ports = BIT(PORT_C);
828 case DL_DCS_PORT_A_AND_C:
829 dev_priv->vbt.dsi.cabc_ports =
830 BIT(PORT_A) | BIT(PORT_C);
836 parse_mipi_config(struct drm_i915_private *dev_priv,
837 const struct bdb_header *bdb)
839 const struct bdb_mipi_config *start;
840 const struct mipi_config *config;
841 const struct mipi_pps_data *pps;
842 int panel_type = dev_priv->vbt.panel_type;
845 /* parse MIPI blocks only if LFP type is MIPI */
846 if (!intel_bios_is_dsi_present(dev_priv, &port))
849 /* Initialize this to undefined indicating no generic MIPI support */
850 dev_priv->vbt.dsi.panel_id = MIPI_DSI_UNDEFINED_PANEL_ID;
852 /* Block #40 is already parsed and panel_fixed_mode is
853 * stored in dev_priv->lfp_lvds_vbt_mode
854 * resuse this when needed
857 /* Parse #52 for panel index used from panel_type already
860 start = find_section(bdb, BDB_MIPI_CONFIG);
862 DRM_DEBUG_KMS("No MIPI config BDB found");
866 DRM_DEBUG_DRIVER("Found MIPI Config block, panel index = %d\n",
870 * get hold of the correct configuration block and pps data as per
871 * the panel_type as index
873 config = &start->config[panel_type];
874 pps = &start->pps[panel_type];
876 /* store as of now full data. Trim when we realise all is not needed */
877 dev_priv->vbt.dsi.config = kmemdup(config, sizeof(struct mipi_config), GFP_KERNEL);
878 if (!dev_priv->vbt.dsi.config)
881 dev_priv->vbt.dsi.pps = kmemdup(pps, sizeof(struct mipi_pps_data), GFP_KERNEL);
882 if (!dev_priv->vbt.dsi.pps) {
883 kfree(dev_priv->vbt.dsi.config);
887 parse_dsi_backlight_ports(dev_priv, bdb->version, port);
889 /* FIXME is the 90 vs. 270 correct? */
890 switch (config->rotation) {
891 case ENABLE_ROTATION_0:
893 * Most (all?) VBTs claim 0 degrees despite having
894 * an upside down panel, thus we do not trust this.
896 dev_priv->vbt.dsi.orientation =
897 DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
899 case ENABLE_ROTATION_90:
900 dev_priv->vbt.dsi.orientation =
901 DRM_MODE_PANEL_ORIENTATION_RIGHT_UP;
903 case ENABLE_ROTATION_180:
904 dev_priv->vbt.dsi.orientation =
905 DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP;
907 case ENABLE_ROTATION_270:
908 dev_priv->vbt.dsi.orientation =
909 DRM_MODE_PANEL_ORIENTATION_LEFT_UP;
913 /* We have mandatory mipi config blocks. Initialize as generic panel */
914 dev_priv->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID;
917 /* Find the sequence block and size for the given panel. */
919 find_panel_sequence_block(const struct bdb_mipi_sequence *sequence,
920 u16 panel_id, u32 *seq_size)
922 u32 total = get_blocksize(sequence);
923 const u8 *data = &sequence->data[0];
926 int header_size = sequence->version >= 3 ? 5 : 3;
930 /* skip new block size */
931 if (sequence->version >= 3)
934 for (i = 0; i < MAX_MIPI_CONFIGURATIONS && index < total; i++) {
935 if (index + header_size > total) {
936 DRM_ERROR("Invalid sequence block (header)\n");
940 current_id = *(data + index);
941 if (sequence->version >= 3)
942 current_size = *((const u32 *)(data + index + 1));
944 current_size = *((const u16 *)(data + index + 1));
946 index += header_size;
948 if (index + current_size > total) {
949 DRM_ERROR("Invalid sequence block\n");
953 if (current_id == panel_id) {
954 *seq_size = current_size;
958 index += current_size;
961 DRM_ERROR("Sequence block detected but no valid configuration\n");
966 static int goto_next_sequence(const u8 *data, int index, int total)
970 /* Skip Sequence Byte. */
971 for (index = index + 1; index < total; index += len) {
972 u8 operation_byte = *(data + index);
975 switch (operation_byte) {
976 case MIPI_SEQ_ELEM_END:
978 case MIPI_SEQ_ELEM_SEND_PKT:
979 if (index + 4 > total)
982 len = *((const u16 *)(data + index + 2)) + 4;
984 case MIPI_SEQ_ELEM_DELAY:
987 case MIPI_SEQ_ELEM_GPIO:
990 case MIPI_SEQ_ELEM_I2C:
991 if (index + 7 > total)
993 len = *(data + index + 6) + 7;
996 DRM_ERROR("Unknown operation byte\n");
1004 static int goto_next_sequence_v3(const u8 *data, int index, int total)
1008 u32 size_of_sequence;
1011 * Could skip sequence based on Size of Sequence alone, but also do some
1012 * checking on the structure.
1015 DRM_ERROR("Too small sequence size\n");
1019 /* Skip Sequence Byte. */
1023 * Size of Sequence. Excludes the Sequence Byte and the size itself,
1024 * includes MIPI_SEQ_ELEM_END byte, excludes the final MIPI_SEQ_END
1027 size_of_sequence = *((const u32 *)(data + index));
1030 seq_end = index + size_of_sequence;
1031 if (seq_end > total) {
1032 DRM_ERROR("Invalid sequence size\n");
1036 for (; index < total; index += len) {
1037 u8 operation_byte = *(data + index);
1040 if (operation_byte == MIPI_SEQ_ELEM_END) {
1041 if (index != seq_end) {
1042 DRM_ERROR("Invalid element structure\n");
1048 len = *(data + index);
1052 * FIXME: Would be nice to check elements like for v1/v2 in
1053 * goto_next_sequence() above.
1055 switch (operation_byte) {
1056 case MIPI_SEQ_ELEM_SEND_PKT:
1057 case MIPI_SEQ_ELEM_DELAY:
1058 case MIPI_SEQ_ELEM_GPIO:
1059 case MIPI_SEQ_ELEM_I2C:
1060 case MIPI_SEQ_ELEM_SPI:
1061 case MIPI_SEQ_ELEM_PMIC:
1064 DRM_ERROR("Unknown operation byte %u\n",
1074 * Get len of pre-fixed deassert fragment from a v1 init OTP sequence,
1075 * skip all delay + gpio operands and stop at the first DSI packet op.
1077 static int get_init_otp_deassert_fragment_len(struct drm_i915_private *dev_priv)
1079 const u8 *data = dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP];
1082 if (WARN_ON(!data || dev_priv->vbt.dsi.seq_version != 1))
1085 /* index = 1 to skip sequence byte */
1086 for (index = 1; data[index] != MIPI_SEQ_ELEM_END; index += len) {
1087 switch (data[index]) {
1088 case MIPI_SEQ_ELEM_SEND_PKT:
1089 return index == 1 ? 0 : index;
1090 case MIPI_SEQ_ELEM_DELAY:
1091 len = 5; /* 1 byte for operand + uint32 */
1093 case MIPI_SEQ_ELEM_GPIO:
1094 len = 3; /* 1 byte for op, 1 for gpio_nr, 1 for value */
1105 * Some v1 VBT MIPI sequences do the deassert in the init OTP sequence.
1106 * The deassert must be done before calling intel_dsi_device_ready, so for
1107 * these devices we split the init OTP sequence into a deassert sequence and
1108 * the actual init OTP part.
1110 static void fixup_mipi_sequences(struct drm_i915_private *dev_priv)
1115 /* Limit this to VLV for now. */
1116 if (!IS_VALLEYVIEW(dev_priv))
1119 /* Limit this to v1 vid-mode sequences */
1120 if (dev_priv->vbt.dsi.config->is_cmd_mode ||
1121 dev_priv->vbt.dsi.seq_version != 1)
1124 /* Only do this if there are otp and assert seqs and no deassert seq */
1125 if (!dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP] ||
1126 !dev_priv->vbt.dsi.sequence[MIPI_SEQ_ASSERT_RESET] ||
1127 dev_priv->vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET])
1130 /* The deassert-sequence ends at the first DSI packet */
1131 len = get_init_otp_deassert_fragment_len(dev_priv);
1135 DRM_DEBUG_KMS("Using init OTP fragment to deassert reset\n");
1137 /* Copy the fragment, update seq byte and terminate it */
1138 init_otp = (u8 *)dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP];
1139 dev_priv->vbt.dsi.deassert_seq = kmemdup(init_otp, len + 1, GFP_KERNEL);
1140 if (!dev_priv->vbt.dsi.deassert_seq)
1142 dev_priv->vbt.dsi.deassert_seq[0] = MIPI_SEQ_DEASSERT_RESET;
1143 dev_priv->vbt.dsi.deassert_seq[len] = MIPI_SEQ_ELEM_END;
1144 /* Use the copy for deassert */
1145 dev_priv->vbt.dsi.sequence[MIPI_SEQ_DEASSERT_RESET] =
1146 dev_priv->vbt.dsi.deassert_seq;
1147 /* Replace the last byte of the fragment with init OTP seq byte */
1148 init_otp[len - 1] = MIPI_SEQ_INIT_OTP;
1149 /* And make MIPI_MIPI_SEQ_INIT_OTP point to it */
1150 dev_priv->vbt.dsi.sequence[MIPI_SEQ_INIT_OTP] = init_otp + len - 1;
1154 parse_mipi_sequence(struct drm_i915_private *dev_priv,
1155 const struct bdb_header *bdb)
1157 int panel_type = dev_priv->vbt.panel_type;
1158 const struct bdb_mipi_sequence *sequence;
1164 /* Only our generic panel driver uses the sequence block. */
1165 if (dev_priv->vbt.dsi.panel_id != MIPI_DSI_GENERIC_PANEL_ID)
1168 sequence = find_section(bdb, BDB_MIPI_SEQUENCE);
1170 DRM_DEBUG_KMS("No MIPI Sequence found, parsing complete\n");
1174 /* Fail gracefully for forward incompatible sequence block. */
1175 if (sequence->version >= 4) {
1176 DRM_ERROR("Unable to parse MIPI Sequence Block v%u\n",
1181 DRM_DEBUG_DRIVER("Found MIPI sequence block v%u\n", sequence->version);
1183 seq_data = find_panel_sequence_block(sequence, panel_type, &seq_size);
1187 data = kmemdup(seq_data, seq_size, GFP_KERNEL);
1191 /* Parse the sequences, store pointers to each sequence. */
1193 u8 seq_id = *(data + index);
1194 if (seq_id == MIPI_SEQ_END)
1197 if (seq_id >= MIPI_SEQ_MAX) {
1198 DRM_ERROR("Unknown sequence %u\n", seq_id);
1202 /* Log about presence of sequences we won't run. */
1203 if (seq_id == MIPI_SEQ_TEAR_ON || seq_id == MIPI_SEQ_TEAR_OFF)
1204 DRM_DEBUG_KMS("Unsupported sequence %u\n", seq_id);
1206 dev_priv->vbt.dsi.sequence[seq_id] = data + index;
1208 if (sequence->version >= 3)
1209 index = goto_next_sequence_v3(data, index, seq_size);
1211 index = goto_next_sequence(data, index, seq_size);
1213 DRM_ERROR("Invalid sequence %u\n", seq_id);
1218 dev_priv->vbt.dsi.data = data;
1219 dev_priv->vbt.dsi.size = seq_size;
1220 dev_priv->vbt.dsi.seq_version = sequence->version;
1222 fixup_mipi_sequences(dev_priv);
1224 DRM_DEBUG_DRIVER("MIPI related VBT parsing complete\n");
1229 memset(dev_priv->vbt.dsi.sequence, 0, sizeof(dev_priv->vbt.dsi.sequence));
1232 static u8 translate_iboost(u8 val)
1234 static const u8 mapping[] = { 1, 3, 7 }; /* See VBT spec */
1236 if (val >= ARRAY_SIZE(mapping)) {
1237 DRM_DEBUG_KMS("Unsupported I_boost value found in VBT (%d), display may not work properly\n", val);
1240 return mapping[val];
1243 static enum port get_port_by_ddc_pin(struct drm_i915_private *i915, u8 ddc_pin)
1245 const struct ddi_vbt_port_info *info;
1248 for (port = PORT_A; port < I915_MAX_PORTS; port++) {
1249 info = &i915->vbt.ddi_port_info[port];
1251 if (info->child && ddc_pin == info->alternate_ddc_pin)
1258 static void sanitize_ddc_pin(struct drm_i915_private *dev_priv,
1261 struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port];
1264 if (!info->alternate_ddc_pin)
1267 p = get_port_by_ddc_pin(dev_priv, info->alternate_ddc_pin);
1268 if (p != PORT_NONE) {
1269 DRM_DEBUG_KMS("port %c trying to use the same DDC pin (0x%x) as port %c, "
1270 "disabling port %c DVI/HDMI support\n",
1271 port_name(port), info->alternate_ddc_pin,
1272 port_name(p), port_name(port));
1275 * If we have multiple ports supposedly sharing the
1276 * pin, then dvi/hdmi couldn't exist on the shared
1277 * port. Otherwise they share the same ddc bin and
1278 * system couldn't communicate with them separately.
1280 * Give child device order the priority, first come first
1283 info->supports_dvi = false;
1284 info->supports_hdmi = false;
1285 info->alternate_ddc_pin = 0;
1289 static enum port get_port_by_aux_ch(struct drm_i915_private *i915, u8 aux_ch)
1291 const struct ddi_vbt_port_info *info;
1294 for (port = PORT_A; port < I915_MAX_PORTS; port++) {
1295 info = &i915->vbt.ddi_port_info[port];
1297 if (info->child && aux_ch == info->alternate_aux_channel)
1304 static void sanitize_aux_ch(struct drm_i915_private *dev_priv,
1307 struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port];
1310 if (!info->alternate_aux_channel)
1313 p = get_port_by_aux_ch(dev_priv, info->alternate_aux_channel);
1314 if (p != PORT_NONE) {
1315 DRM_DEBUG_KMS("port %c trying to use the same AUX CH (0x%x) as port %c, "
1316 "disabling port %c DP support\n",
1317 port_name(port), info->alternate_aux_channel,
1318 port_name(p), port_name(port));
1321 * If we have multiple ports supposedlt sharing the
1322 * aux channel, then DP couldn't exist on the shared
1323 * port. Otherwise they share the same aux channel
1324 * and system couldn't communicate with them separately.
1326 * Give child device order the priority, first come first
1329 info->supports_dp = false;
1330 info->alternate_aux_channel = 0;
1334 static const u8 cnp_ddc_pin_map[] = {
1336 [DDC_BUS_DDI_B] = GMBUS_PIN_1_BXT,
1337 [DDC_BUS_DDI_C] = GMBUS_PIN_2_BXT,
1338 [DDC_BUS_DDI_D] = GMBUS_PIN_4_CNP, /* sic */
1339 [DDC_BUS_DDI_F] = GMBUS_PIN_3_BXT, /* sic */
1342 static const u8 icp_ddc_pin_map[] = {
1343 [ICL_DDC_BUS_DDI_A] = GMBUS_PIN_1_BXT,
1344 [ICL_DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
1345 [ICL_DDC_BUS_PORT_1] = GMBUS_PIN_9_TC1_ICP,
1346 [ICL_DDC_BUS_PORT_2] = GMBUS_PIN_10_TC2_ICP,
1347 [ICL_DDC_BUS_PORT_3] = GMBUS_PIN_11_TC3_ICP,
1348 [ICL_DDC_BUS_PORT_4] = GMBUS_PIN_12_TC4_ICP,
1351 static const u8 mcc_ddc_pin_map[] = {
1352 [MCC_DDC_BUS_DDI_A] = GMBUS_PIN_1_BXT,
1353 [MCC_DDC_BUS_DDI_B] = GMBUS_PIN_2_BXT,
1354 [MCC_DDC_BUS_DDI_C] = GMBUS_PIN_9_TC1_ICP,
1357 static u8 map_ddc_pin(struct drm_i915_private *dev_priv, u8 vbt_pin)
1359 const u8 *ddc_pin_map;
1362 if (HAS_PCH_MCC(dev_priv)) {
1363 ddc_pin_map = mcc_ddc_pin_map;
1364 n_entries = ARRAY_SIZE(mcc_ddc_pin_map);
1365 } else if (HAS_PCH_ICP(dev_priv)) {
1366 ddc_pin_map = icp_ddc_pin_map;
1367 n_entries = ARRAY_SIZE(icp_ddc_pin_map);
1368 } else if (HAS_PCH_CNP(dev_priv)) {
1369 ddc_pin_map = cnp_ddc_pin_map;
1370 n_entries = ARRAY_SIZE(cnp_ddc_pin_map);
1372 /* Assuming direct map */
1376 if (vbt_pin < n_entries && ddc_pin_map[vbt_pin] != 0)
1377 return ddc_pin_map[vbt_pin];
1379 DRM_DEBUG_KMS("Ignoring alternate pin: VBT claims DDC pin %d, which is not valid for this platform\n",
1384 static enum port dvo_port_to_port(u8 dvo_port)
1387 * Each DDI port can have more than one value on the "DVO Port" field,
1388 * so look for all the possible values for each port.
1390 static const int dvo_ports[][3] = {
1391 [PORT_A] = { DVO_PORT_HDMIA, DVO_PORT_DPA, -1},
1392 [PORT_B] = { DVO_PORT_HDMIB, DVO_PORT_DPB, -1},
1393 [PORT_C] = { DVO_PORT_HDMIC, DVO_PORT_DPC, -1},
1394 [PORT_D] = { DVO_PORT_HDMID, DVO_PORT_DPD, -1},
1395 [PORT_E] = { DVO_PORT_CRT, DVO_PORT_HDMIE, DVO_PORT_DPE},
1396 [PORT_F] = { DVO_PORT_HDMIF, DVO_PORT_DPF, -1},
1401 for (port = PORT_A; port < ARRAY_SIZE(dvo_ports); port++) {
1402 for (i = 0; i < ARRAY_SIZE(dvo_ports[port]); i++) {
1403 if (dvo_ports[port][i] == -1)
1406 if (dvo_port == dvo_ports[port][i])
1414 static void parse_ddi_port(struct drm_i915_private *dev_priv,
1415 const struct child_device_config *child,
1418 struct ddi_vbt_port_info *info;
1419 bool is_dvi, is_hdmi, is_dp, is_edp, is_crt;
1422 port = dvo_port_to_port(child->dvo_port);
1423 if (port == PORT_NONE)
1426 info = &dev_priv->vbt.ddi_port_info[port];
1429 DRM_DEBUG_KMS("More than one child device for port %c in VBT, using the first.\n",
1434 is_dvi = child->device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
1435 is_dp = child->device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
1436 is_crt = child->device_type & DEVICE_TYPE_ANALOG_OUTPUT;
1437 is_hdmi = is_dvi && (child->device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
1438 is_edp = is_dp && (child->device_type & DEVICE_TYPE_INTERNAL_CONNECTOR);
1440 if (port == PORT_A && is_dvi) {
1441 DRM_DEBUG_KMS("VBT claims port A supports DVI%s, ignoring\n",
1442 is_hdmi ? "/HDMI" : "");
1447 info->supports_dvi = is_dvi;
1448 info->supports_hdmi = is_hdmi;
1449 info->supports_dp = is_dp;
1450 info->supports_edp = is_edp;
1452 if (bdb_version >= 195)
1453 info->supports_typec_usb = child->dp_usb_type_c;
1455 if (bdb_version >= 209)
1456 info->supports_tbt = child->tbt;
1458 DRM_DEBUG_KMS("Port %c VBT info: CRT:%d DVI:%d HDMI:%d DP:%d eDP:%d LSPCON:%d USB-Type-C:%d TBT:%d\n",
1459 port_name(port), is_crt, is_dvi, is_hdmi, is_dp, is_edp,
1460 HAS_LSPCON(dev_priv) && child->lspcon,
1461 info->supports_typec_usb, info->supports_tbt);
1463 if (is_edp && is_dvi)
1464 DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
1466 if (is_crt && port != PORT_E)
1467 DRM_DEBUG_KMS("Port %c is analog\n", port_name(port));
1468 if (is_crt && (is_dvi || is_dp))
1469 DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
1471 if (is_dvi && (port == PORT_A || port == PORT_E))
1472 DRM_DEBUG_KMS("Port %c is TMDS compatible\n", port_name(port));
1473 if (!is_dvi && !is_dp && !is_crt)
1474 DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
1476 if (is_edp && (port == PORT_B || port == PORT_C || port == PORT_E))
1477 DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port));
1482 ddc_pin = map_ddc_pin(dev_priv, child->ddc_pin);
1483 if (intel_gmbus_is_valid_pin(dev_priv, ddc_pin)) {
1484 info->alternate_ddc_pin = ddc_pin;
1485 sanitize_ddc_pin(dev_priv, port);
1487 DRM_DEBUG_KMS("Port %c has invalid DDC pin %d, "
1488 "sticking to defaults\n",
1489 port_name(port), ddc_pin);
1494 info->alternate_aux_channel = child->aux_channel;
1496 sanitize_aux_ch(dev_priv, port);
1499 if (bdb_version >= 158) {
1500 /* The VBT HDMI level shift values match the table we have. */
1501 u8 hdmi_level_shift = child->hdmi_level_shifter_value;
1502 DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
1505 info->hdmi_level_shift = hdmi_level_shift;
1508 if (bdb_version >= 204) {
1511 switch (child->hdmi_max_data_rate) {
1513 MISSING_CASE(child->hdmi_max_data_rate);
1515 case HDMI_MAX_DATA_RATE_PLATFORM:
1518 case HDMI_MAX_DATA_RATE_297:
1519 max_tmds_clock = 297000;
1521 case HDMI_MAX_DATA_RATE_165:
1522 max_tmds_clock = 165000;
1527 DRM_DEBUG_KMS("VBT HDMI max TMDS clock for port %c: %d kHz\n",
1528 port_name(port), max_tmds_clock);
1529 info->max_tmds_clock = max_tmds_clock;
1532 /* Parse the I_boost config for SKL and above */
1533 if (bdb_version >= 196 && child->iboost) {
1534 info->dp_boost_level = translate_iboost(child->dp_iboost_level);
1535 DRM_DEBUG_KMS("VBT (e)DP boost level for port %c: %d\n",
1536 port_name(port), info->dp_boost_level);
1537 info->hdmi_boost_level = translate_iboost(child->hdmi_iboost_level);
1538 DRM_DEBUG_KMS("VBT HDMI boost level for port %c: %d\n",
1539 port_name(port), info->hdmi_boost_level);
1542 /* DP max link rate for CNL+ */
1543 if (bdb_version >= 216) {
1544 switch (child->dp_max_link_rate) {
1546 case VBT_DP_MAX_LINK_RATE_HBR3:
1547 info->dp_max_link_rate = 810000;
1549 case VBT_DP_MAX_LINK_RATE_HBR2:
1550 info->dp_max_link_rate = 540000;
1552 case VBT_DP_MAX_LINK_RATE_HBR:
1553 info->dp_max_link_rate = 270000;
1555 case VBT_DP_MAX_LINK_RATE_LBR:
1556 info->dp_max_link_rate = 162000;
1559 DRM_DEBUG_KMS("VBT DP max link rate for port %c: %d\n",
1560 port_name(port), info->dp_max_link_rate);
1563 info->child = child;
1566 static void parse_ddi_ports(struct drm_i915_private *dev_priv, u8 bdb_version)
1568 const struct child_device_config *child;
1571 if (!HAS_DDI(dev_priv) && !IS_CHERRYVIEW(dev_priv))
1574 if (bdb_version < 155)
1577 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1578 child = dev_priv->vbt.child_dev + i;
1580 parse_ddi_port(dev_priv, child, bdb_version);
1585 parse_general_definitions(struct drm_i915_private *dev_priv,
1586 const struct bdb_header *bdb)
1588 const struct bdb_general_definitions *defs;
1589 const struct child_device_config *child;
1590 int i, child_device_num, count;
1595 defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
1597 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
1601 block_size = get_blocksize(defs);
1602 if (block_size < sizeof(*defs)) {
1603 DRM_DEBUG_KMS("General definitions block too small (%u)\n",
1608 bus_pin = defs->crt_ddc_gmbus_pin;
1609 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
1610 if (intel_gmbus_is_valid_pin(dev_priv, bus_pin))
1611 dev_priv->vbt.crt_ddc_pin = bus_pin;
1613 if (bdb->version < 106) {
1615 } else if (bdb->version < 111) {
1617 } else if (bdb->version < 195) {
1618 expected_size = LEGACY_CHILD_DEVICE_CONFIG_SIZE;
1619 } else if (bdb->version == 195) {
1621 } else if (bdb->version <= 215) {
1623 } else if (bdb->version <= 216) {
1626 expected_size = sizeof(*child);
1627 BUILD_BUG_ON(sizeof(*child) < 39);
1628 DRM_DEBUG_DRIVER("Expected child device config size for VBT version %u not known; assuming %u\n",
1629 bdb->version, expected_size);
1632 /* Flag an error for unexpected size, but continue anyway. */
1633 if (defs->child_dev_size != expected_size)
1634 DRM_ERROR("Unexpected child device config size %u (expected %u for VBT version %u)\n",
1635 defs->child_dev_size, expected_size, bdb->version);
1637 /* The legacy sized child device config is the minimum we need. */
1638 if (defs->child_dev_size < LEGACY_CHILD_DEVICE_CONFIG_SIZE) {
1639 DRM_DEBUG_KMS("Child device config size %u is too small.\n",
1640 defs->child_dev_size);
1644 /* get the number of child device */
1645 child_device_num = (block_size - sizeof(*defs)) / defs->child_dev_size;
1647 /* get the number of child device that is present */
1648 for (i = 0; i < child_device_num; i++) {
1649 child = child_device_ptr(defs, i);
1650 if (!child->device_type)
1655 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
1658 dev_priv->vbt.child_dev = kcalloc(count, sizeof(*child), GFP_KERNEL);
1659 if (!dev_priv->vbt.child_dev) {
1660 DRM_DEBUG_KMS("No memory space for child device\n");
1664 dev_priv->vbt.child_dev_num = count;
1666 for (i = 0; i < child_device_num; i++) {
1667 child = child_device_ptr(defs, i);
1668 if (!child->device_type)
1672 * Copy as much as we know (sizeof) and is available
1673 * (child_dev_size) of the child device. Accessing the data must
1674 * depend on VBT version.
1676 memcpy(dev_priv->vbt.child_dev + count, child,
1677 min_t(size_t, defs->child_dev_size, sizeof(*child)));
1682 /* Common defaults which may be overridden by VBT. */
1684 init_vbt_defaults(struct drm_i915_private *dev_priv)
1688 dev_priv->vbt.crt_ddc_pin = GMBUS_PIN_VGADDC;
1690 /* Default to having backlight */
1691 dev_priv->vbt.backlight.present = true;
1693 /* LFP panel data */
1694 dev_priv->vbt.lvds_dither = 1;
1696 /* SDVO panel data */
1697 dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
1699 /* general features */
1700 dev_priv->vbt.int_tv_support = 1;
1701 dev_priv->vbt.int_crt_support = 1;
1703 /* driver features */
1704 dev_priv->vbt.int_lvds_support = 1;
1706 /* Default to using SSC */
1707 dev_priv->vbt.lvds_use_ssc = 1;
1709 * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
1712 dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev_priv,
1713 !HAS_PCH_SPLIT(dev_priv));
1714 DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv->vbt.lvds_ssc_freq);
1716 for (port = PORT_A; port < I915_MAX_PORTS; port++) {
1717 struct ddi_vbt_port_info *info =
1718 &dev_priv->vbt.ddi_port_info[port];
1720 info->hdmi_level_shift = HDMI_LEVEL_SHIFT_UNKNOWN;
1724 /* Defaults to initialize only if there is no VBT. */
1726 init_vbt_missing_defaults(struct drm_i915_private *dev_priv)
1730 for (port = PORT_A; port < I915_MAX_PORTS; port++) {
1731 struct ddi_vbt_port_info *info =
1732 &dev_priv->vbt.ddi_port_info[port];
1735 * VBT has the TypeC mode (native,TBT/USB) and we don't want
1738 if (intel_port_is_tc(dev_priv, port))
1741 info->supports_dvi = (port != PORT_A && port != PORT_E);
1742 info->supports_hdmi = info->supports_dvi;
1743 info->supports_dp = (port != PORT_E);
1744 info->supports_edp = (port == PORT_A);
1748 static const struct bdb_header *get_bdb_header(const struct vbt_header *vbt)
1750 const void *_vbt = vbt;
1752 return _vbt + vbt->bdb_offset;
1756 * intel_bios_is_valid_vbt - does the given buffer contain a valid VBT
1757 * @buf: pointer to a buffer to validate
1758 * @size: size of the buffer
1760 * Returns true on valid VBT.
1762 bool intel_bios_is_valid_vbt(const void *buf, size_t size)
1764 const struct vbt_header *vbt = buf;
1765 const struct bdb_header *bdb;
1770 if (sizeof(struct vbt_header) > size) {
1771 DRM_DEBUG_DRIVER("VBT header incomplete\n");
1775 if (memcmp(vbt->signature, "$VBT", 4)) {
1776 DRM_DEBUG_DRIVER("VBT invalid signature\n");
1780 if (range_overflows_t(size_t,
1782 sizeof(struct bdb_header),
1784 DRM_DEBUG_DRIVER("BDB header incomplete\n");
1788 bdb = get_bdb_header(vbt);
1789 if (range_overflows_t(size_t, vbt->bdb_offset, bdb->bdb_size, size)) {
1790 DRM_DEBUG_DRIVER("BDB incomplete\n");
1797 static const struct vbt_header *find_vbt(void __iomem *bios, size_t size)
1801 /* Scour memory looking for the VBT signature. */
1802 for (i = 0; i + 4 < size; i++) {
1805 if (ioread32(bios + i) != *((const u32 *) "$VBT"))
1809 * This is the one place where we explicitly discard the address
1810 * space (__iomem) of the BIOS/VBT.
1812 vbt = (void __force *) bios + i;
1813 if (intel_bios_is_valid_vbt(vbt, size - i))
1823 * intel_bios_init - find VBT and initialize settings from the BIOS
1824 * @dev_priv: i915 device instance
1826 * Parse and initialize settings from the Video BIOS Tables (VBT). If the VBT
1827 * was not found in ACPI OpRegion, try to find it in PCI ROM first. Also
1828 * initialize some defaults if the VBT is not present at all.
1830 void intel_bios_init(struct drm_i915_private *dev_priv)
1832 struct pci_dev *pdev = dev_priv->drm.pdev;
1833 const struct vbt_header *vbt = dev_priv->opregion.vbt;
1834 const struct bdb_header *bdb;
1835 u8 __iomem *bios = NULL;
1837 if (!HAS_DISPLAY(dev_priv)) {
1838 DRM_DEBUG_KMS("Skipping VBT init due to disabled display.\n");
1842 init_vbt_defaults(dev_priv);
1844 /* If the OpRegion does not have VBT, look in PCI ROM. */
1848 bios = pci_map_rom(pdev, &size);
1852 vbt = find_vbt(bios, size);
1856 DRM_DEBUG_KMS("Found valid VBT in PCI ROM\n");
1859 bdb = get_bdb_header(vbt);
1861 DRM_DEBUG_KMS("VBT signature \"%.*s\", BDB version %d\n",
1862 (int)sizeof(vbt->signature), vbt->signature, bdb->version);
1864 /* Grab useful general definitions */
1865 parse_general_features(dev_priv, bdb);
1866 parse_general_definitions(dev_priv, bdb);
1867 parse_lfp_panel_data(dev_priv, bdb);
1868 parse_lfp_backlight(dev_priv, bdb);
1869 parse_sdvo_panel_data(dev_priv, bdb);
1870 parse_driver_features(dev_priv, bdb);
1871 parse_edp(dev_priv, bdb);
1872 parse_psr(dev_priv, bdb);
1873 parse_mipi_config(dev_priv, bdb);
1874 parse_mipi_sequence(dev_priv, bdb);
1876 /* Further processing on pre-parsed data */
1877 parse_sdvo_device_mapping(dev_priv, bdb->version);
1878 parse_ddi_ports(dev_priv, bdb->version);
1882 DRM_INFO("Failed to find VBIOS tables (VBT)\n");
1883 init_vbt_missing_defaults(dev_priv);
1887 pci_unmap_rom(pdev, bios);
1891 * intel_bios_cleanup - Free any resources allocated by intel_bios_init()
1892 * @dev_priv: i915 device instance
1894 void intel_bios_cleanup(struct drm_i915_private *dev_priv)
1896 kfree(dev_priv->vbt.child_dev);
1897 dev_priv->vbt.child_dev = NULL;
1898 dev_priv->vbt.child_dev_num = 0;
1899 kfree(dev_priv->vbt.sdvo_lvds_vbt_mode);
1900 dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
1901 kfree(dev_priv->vbt.lfp_lvds_vbt_mode);
1902 dev_priv->vbt.lfp_lvds_vbt_mode = NULL;
1903 kfree(dev_priv->vbt.dsi.data);
1904 dev_priv->vbt.dsi.data = NULL;
1905 kfree(dev_priv->vbt.dsi.pps);
1906 dev_priv->vbt.dsi.pps = NULL;
1907 kfree(dev_priv->vbt.dsi.config);
1908 dev_priv->vbt.dsi.config = NULL;
1909 kfree(dev_priv->vbt.dsi.deassert_seq);
1910 dev_priv->vbt.dsi.deassert_seq = NULL;
1914 * intel_bios_is_tv_present - is integrated TV present in VBT
1915 * @dev_priv: i915 device instance
1917 * Return true if TV is present. If no child devices were parsed from VBT,
1918 * assume TV is present.
1920 bool intel_bios_is_tv_present(struct drm_i915_private *dev_priv)
1922 const struct child_device_config *child;
1925 if (!dev_priv->vbt.int_tv_support)
1928 if (!dev_priv->vbt.child_dev_num)
1931 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1932 child = dev_priv->vbt.child_dev + i;
1934 * If the device type is not TV, continue.
1936 switch (child->device_type) {
1937 case DEVICE_TYPE_INT_TV:
1938 case DEVICE_TYPE_TV:
1939 case DEVICE_TYPE_TV_SVIDEO_COMPOSITE:
1944 /* Only when the addin_offset is non-zero, it is regarded
1947 if (child->addin_offset)
1955 * intel_bios_is_lvds_present - is LVDS present in VBT
1956 * @dev_priv: i915 device instance
1957 * @i2c_pin: i2c pin for LVDS if present
1959 * Return true if LVDS is present. If no child devices were parsed from VBT,
1960 * assume LVDS is present.
1962 bool intel_bios_is_lvds_present(struct drm_i915_private *dev_priv, u8 *i2c_pin)
1964 const struct child_device_config *child;
1967 if (!dev_priv->vbt.child_dev_num)
1970 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
1971 child = dev_priv->vbt.child_dev + i;
1973 /* If the device type is not LFP, continue.
1974 * We have to check both the new identifiers as well as the
1975 * old for compatibility with some BIOSes.
1977 if (child->device_type != DEVICE_TYPE_INT_LFP &&
1978 child->device_type != DEVICE_TYPE_LFP)
1981 if (intel_gmbus_is_valid_pin(dev_priv, child->i2c_pin))
1982 *i2c_pin = child->i2c_pin;
1984 /* However, we cannot trust the BIOS writers to populate
1985 * the VBT correctly. Since LVDS requires additional
1986 * information from AIM blocks, a non-zero addin offset is
1987 * a good indicator that the LVDS is actually present.
1989 if (child->addin_offset)
1992 /* But even then some BIOS writers perform some black magic
1993 * and instantiate the device without reference to any
1994 * additional data. Trust that if the VBT was written into
1995 * the OpRegion then they have validated the LVDS's existence.
1997 if (dev_priv->opregion.vbt)
2005 * intel_bios_is_port_present - is the specified digital port present
2006 * @dev_priv: i915 device instance
2007 * @port: port to check
2009 * Return true if the device in %port is present.
2011 bool intel_bios_is_port_present(struct drm_i915_private *dev_priv, enum port port)
2013 const struct child_device_config *child;
2014 static const struct {
2016 } port_mapping[] = {
2017 [PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, },
2018 [PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, },
2019 [PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, },
2020 [PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, },
2021 [PORT_F] = { DVO_PORT_DPF, DVO_PORT_HDMIF, },
2025 if (HAS_DDI(dev_priv)) {
2026 const struct ddi_vbt_port_info *port_info =
2027 &dev_priv->vbt.ddi_port_info[port];
2029 return port_info->supports_dp ||
2030 port_info->supports_dvi ||
2031 port_info->supports_hdmi;
2034 /* FIXME maybe deal with port A as well? */
2035 if (WARN_ON(port == PORT_A) || port >= ARRAY_SIZE(port_mapping))
2038 if (!dev_priv->vbt.child_dev_num)
2041 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
2042 child = dev_priv->vbt.child_dev + i;
2044 if ((child->dvo_port == port_mapping[port].dp ||
2045 child->dvo_port == port_mapping[port].hdmi) &&
2046 (child->device_type & (DEVICE_TYPE_TMDS_DVI_SIGNALING |
2047 DEVICE_TYPE_DISPLAYPORT_OUTPUT)))
2055 * intel_bios_is_port_edp - is the device in given port eDP
2056 * @dev_priv: i915 device instance
2057 * @port: port to check
2059 * Return true if the device in %port is eDP.
2061 bool intel_bios_is_port_edp(struct drm_i915_private *dev_priv, enum port port)
2063 const struct child_device_config *child;
2064 static const short port_mapping[] = {
2065 [PORT_B] = DVO_PORT_DPB,
2066 [PORT_C] = DVO_PORT_DPC,
2067 [PORT_D] = DVO_PORT_DPD,
2068 [PORT_E] = DVO_PORT_DPE,
2069 [PORT_F] = DVO_PORT_DPF,
2073 if (HAS_DDI(dev_priv))
2074 return dev_priv->vbt.ddi_port_info[port].supports_edp;
2076 if (!dev_priv->vbt.child_dev_num)
2079 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
2080 child = dev_priv->vbt.child_dev + i;
2082 if (child->dvo_port == port_mapping[port] &&
2083 (child->device_type & DEVICE_TYPE_eDP_BITS) ==
2084 (DEVICE_TYPE_eDP & DEVICE_TYPE_eDP_BITS))
2091 static bool child_dev_is_dp_dual_mode(const struct child_device_config *child,
2094 static const struct {
2096 } port_mapping[] = {
2098 * Buggy VBTs may declare DP ports as having
2099 * HDMI type dvo_port :( So let's check both.
2101 [PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, },
2102 [PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, },
2103 [PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, },
2104 [PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, },
2105 [PORT_F] = { DVO_PORT_DPF, DVO_PORT_HDMIF, },
2108 if (port == PORT_A || port >= ARRAY_SIZE(port_mapping))
2111 if ((child->device_type & DEVICE_TYPE_DP_DUAL_MODE_BITS) !=
2112 (DEVICE_TYPE_DP_DUAL_MODE & DEVICE_TYPE_DP_DUAL_MODE_BITS))
2115 if (child->dvo_port == port_mapping[port].dp)
2118 /* Only accept a HDMI dvo_port as DP++ if it has an AUX channel */
2119 if (child->dvo_port == port_mapping[port].hdmi &&
2120 child->aux_channel != 0)
2126 bool intel_bios_is_port_dp_dual_mode(struct drm_i915_private *dev_priv,
2129 const struct child_device_config *child;
2132 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
2133 child = dev_priv->vbt.child_dev + i;
2135 if (child_dev_is_dp_dual_mode(child, port))
2143 * intel_bios_is_dsi_present - is DSI present in VBT
2144 * @dev_priv: i915 device instance
2145 * @port: port for DSI if present
2147 * Return true if DSI is present, and return the port in %port.
2149 bool intel_bios_is_dsi_present(struct drm_i915_private *dev_priv,
2152 const struct child_device_config *child;
2156 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
2157 child = dev_priv->vbt.child_dev + i;
2159 if (!(child->device_type & DEVICE_TYPE_MIPI_OUTPUT))
2162 dvo_port = child->dvo_port;
2164 if (dvo_port == DVO_PORT_MIPIA ||
2165 (dvo_port == DVO_PORT_MIPIB && INTEL_GEN(dev_priv) >= 11) ||
2166 (dvo_port == DVO_PORT_MIPIC && INTEL_GEN(dev_priv) < 11)) {
2168 *port = dvo_port - DVO_PORT_MIPIA;
2170 } else if (dvo_port == DVO_PORT_MIPIB ||
2171 dvo_port == DVO_PORT_MIPIC ||
2172 dvo_port == DVO_PORT_MIPID) {
2173 DRM_DEBUG_KMS("VBT has unsupported DSI port %c\n",
2174 port_name(dvo_port - DVO_PORT_MIPIA));
2182 * intel_bios_is_port_hpd_inverted - is HPD inverted for %port
2183 * @i915: i915 device instance
2184 * @port: port to check
2186 * Return true if HPD should be inverted for %port.
2189 intel_bios_is_port_hpd_inverted(const struct drm_i915_private *i915,
2192 const struct child_device_config *child =
2193 i915->vbt.ddi_port_info[port].child;
2195 if (WARN_ON_ONCE(!IS_GEN9_LP(i915)))
2198 return child && child->hpd_invert;
2202 * intel_bios_is_lspcon_present - if LSPCON is attached on %port
2203 * @i915: i915 device instance
2204 * @port: port to check
2206 * Return true if LSPCON is present on this port
2209 intel_bios_is_lspcon_present(const struct drm_i915_private *i915,
2212 const struct child_device_config *child =
2213 i915->vbt.ddi_port_info[port].child;
2215 return HAS_LSPCON(i915) && child && child->lspcon;
2218 enum aux_ch intel_bios_port_aux_ch(struct drm_i915_private *dev_priv,
2221 const struct ddi_vbt_port_info *info =
2222 &dev_priv->vbt.ddi_port_info[port];
2225 if (!info->alternate_aux_channel) {
2226 aux_ch = (enum aux_ch)port;
2228 DRM_DEBUG_KMS("using AUX %c for port %c (platform default)\n",
2229 aux_ch_name(aux_ch), port_name(port));
2233 switch (info->alternate_aux_channel) {
2253 MISSING_CASE(info->alternate_aux_channel);
2258 DRM_DEBUG_KMS("using AUX %c for port %c (VBT)\n",
2259 aux_ch_name(aux_ch), port_name(port));