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>
27 #include <linux/dmi.h>
29 #include <drm/drm_dp_helper.h>
30 #include <drm/i915_drm.h>
32 #include "intel_bios.h"
33 #include <linux/string.h>
35 #define SLAVE_ADDR1 0x70
36 #define SLAVE_ADDR2 0x72
38 static int panel_type;
41 find_section(struct bdb_header *bdb, int section_id)
45 u16 total, current_size;
48 /* skip to first section */
49 index += bdb->header_size;
50 total = bdb->bdb_size;
52 /* walk the sections looking for section_id */
53 while (index + 3 < total) {
54 current_id = *(base + index);
57 current_size = *((u16 *)(base + index));
60 if (index + current_size > total)
63 if (current_id == section_id)
66 index += current_size;
73 get_blocksize(void *p)
75 u16 *block_ptr, block_size;
77 block_ptr = (u16 *)((char *)p - 2);
78 block_size = *block_ptr;
83 fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
84 const struct lvds_dvo_timing *dvo_timing)
86 panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
87 dvo_timing->hactive_lo;
88 panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
89 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
90 panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
91 dvo_timing->hsync_pulse_width;
92 panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
93 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
95 panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
96 dvo_timing->vactive_lo;
97 panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
98 dvo_timing->vsync_off;
99 panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
100 dvo_timing->vsync_pulse_width;
101 panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
102 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
103 panel_fixed_mode->clock = dvo_timing->clock * 10;
104 panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
106 if (dvo_timing->hsync_positive)
107 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
109 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
111 if (dvo_timing->vsync_positive)
112 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
114 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
116 /* Some VBTs have bogus h/vtotal values */
117 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
118 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
119 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
120 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
122 drm_mode_set_name(panel_fixed_mode);
126 lvds_dvo_timing_equal_size(const struct lvds_dvo_timing *a,
127 const struct lvds_dvo_timing *b)
129 if (a->hactive_hi != b->hactive_hi ||
130 a->hactive_lo != b->hactive_lo)
133 if (a->hsync_off_hi != b->hsync_off_hi ||
134 a->hsync_off_lo != b->hsync_off_lo)
137 if (a->hsync_pulse_width != b->hsync_pulse_width)
140 if (a->hblank_hi != b->hblank_hi ||
141 a->hblank_lo != b->hblank_lo)
144 if (a->vactive_hi != b->vactive_hi ||
145 a->vactive_lo != b->vactive_lo)
148 if (a->vsync_off != b->vsync_off)
151 if (a->vsync_pulse_width != b->vsync_pulse_width)
154 if (a->vblank_hi != b->vblank_hi ||
155 a->vblank_lo != b->vblank_lo)
161 static const struct lvds_dvo_timing *
162 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
163 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs,
167 * the size of fp_timing varies on the different platform.
168 * So calculate the DVO timing relative offset in LVDS data
169 * entry to get the DVO timing entry
173 lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
174 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
175 int dvo_timing_offset =
176 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
177 lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
178 const char *entry = (const char *)lvds_lfp_data->data + lfp_data_size * index;
180 return (const struct lvds_dvo_timing *)(entry + dvo_timing_offset);
183 /* get lvds_fp_timing entry
184 * this function may return NULL if the corresponding entry is invalid
186 static const struct lvds_fp_timing *
187 get_lvds_fp_timing(const struct bdb_header *bdb,
188 const struct bdb_lvds_lfp_data *data,
189 const struct bdb_lvds_lfp_data_ptrs *ptrs,
192 size_t data_ofs = (const u8 *)data - (const u8 *)bdb;
193 u16 data_size = ((const u16 *)data)[-1]; /* stored in header */
196 if (index >= ARRAY_SIZE(ptrs->ptr))
198 ofs = ptrs->ptr[index].fp_timing_offset;
199 if (ofs < data_ofs ||
200 ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size)
202 return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs);
205 /* Try to find integrated panel data */
207 parse_lfp_panel_data(struct drm_i915_private *dev_priv,
208 struct bdb_header *bdb)
210 const struct bdb_lvds_options *lvds_options;
211 const struct bdb_lvds_lfp_data *lvds_lfp_data;
212 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
213 const struct lvds_dvo_timing *panel_dvo_timing;
214 const struct lvds_fp_timing *fp_timing;
215 struct drm_display_mode *panel_fixed_mode;
216 int i, downclock, drrs_mode;
218 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
222 dev_priv->vbt.lvds_dither = lvds_options->pixel_dither;
223 if (lvds_options->panel_type == 0xff)
226 panel_type = lvds_options->panel_type;
228 drrs_mode = (lvds_options->dps_panel_type_bits
229 >> (panel_type * 2)) & MODE_MASK;
231 * VBT has static DRRS = 0 and seamless DRRS = 2.
232 * The below piece of code is required to adjust vbt.drrs_type
233 * to match the enum drrs_support_type.
237 dev_priv->vbt.drrs_type = STATIC_DRRS_SUPPORT;
238 DRM_DEBUG_KMS("DRRS supported mode is static\n");
241 dev_priv->vbt.drrs_type = SEAMLESS_DRRS_SUPPORT;
242 DRM_DEBUG_KMS("DRRS supported mode is seamless\n");
245 dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
246 DRM_DEBUG_KMS("DRRS not supported (VBT input)\n");
250 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
254 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
255 if (!lvds_lfp_data_ptrs)
258 dev_priv->vbt.lvds_vbt = 1;
260 panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
262 lvds_options->panel_type);
264 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
265 if (!panel_fixed_mode)
268 fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);
270 dev_priv->vbt.lfp_lvds_vbt_mode = panel_fixed_mode;
272 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
273 drm_mode_debug_printmodeline(panel_fixed_mode);
276 * Iterate over the LVDS panel timing info to find the lowest clock
277 * for the native resolution.
279 downclock = panel_dvo_timing->clock;
280 for (i = 0; i < 16; i++) {
281 const struct lvds_dvo_timing *dvo_timing;
283 dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
286 if (lvds_dvo_timing_equal_size(dvo_timing, panel_dvo_timing) &&
287 dvo_timing->clock < downclock)
288 downclock = dvo_timing->clock;
291 if (downclock < panel_dvo_timing->clock && i915.lvds_downclock) {
292 dev_priv->lvds_downclock_avail = 1;
293 dev_priv->lvds_downclock = downclock * 10;
294 DRM_DEBUG_KMS("LVDS downclock is found in VBT. "
295 "Normal Clock %dKHz, downclock %dKHz\n",
296 panel_fixed_mode->clock, 10*downclock);
299 fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data,
301 lvds_options->panel_type);
303 /* check the resolution, just to be sure */
304 if (fp_timing->x_res == panel_fixed_mode->hdisplay &&
305 fp_timing->y_res == panel_fixed_mode->vdisplay) {
306 dev_priv->vbt.bios_lvds_val = fp_timing->lvds_reg_val;
307 DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
308 dev_priv->vbt.bios_lvds_val);
314 parse_lfp_backlight(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
316 const struct bdb_lfp_backlight_data *backlight_data;
317 const struct bdb_lfp_backlight_data_entry *entry;
319 backlight_data = find_section(bdb, BDB_LVDS_BACKLIGHT);
323 if (backlight_data->entry_size != sizeof(backlight_data->data[0])) {
324 DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n",
325 backlight_data->entry_size);
329 entry = &backlight_data->data[panel_type];
331 dev_priv->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM;
332 if (!dev_priv->vbt.backlight.present) {
333 DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n",
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\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]);
349 /* Try to find sdvo panel data */
351 parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
352 struct bdb_header *bdb)
354 struct lvds_dvo_timing *dvo_timing;
355 struct drm_display_mode *panel_fixed_mode;
358 index = i915.vbt_sdvo_panel_type;
360 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
365 struct bdb_sdvo_lvds_options *sdvo_lvds_options;
367 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
368 if (!sdvo_lvds_options)
371 index = sdvo_lvds_options->panel_type;
374 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
378 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
379 if (!panel_fixed_mode)
382 fill_detail_timing_data(panel_fixed_mode, dvo_timing + index);
384 dev_priv->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode;
386 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
387 drm_mode_debug_printmodeline(panel_fixed_mode);
390 static int intel_bios_ssc_frequency(struct drm_device *dev,
393 switch (INTEL_INFO(dev)->gen) {
395 return alternate ? 66667 : 48000;
398 return alternate ? 100000 : 96000;
400 return alternate ? 100000 : 120000;
405 parse_general_features(struct drm_i915_private *dev_priv,
406 struct bdb_header *bdb)
408 struct drm_device *dev = dev_priv->dev;
409 struct bdb_general_features *general;
411 general = find_section(bdb, BDB_GENERAL_FEATURES);
413 dev_priv->vbt.int_tv_support = general->int_tv_support;
414 dev_priv->vbt.int_crt_support = general->int_crt_support;
415 dev_priv->vbt.lvds_use_ssc = general->enable_ssc;
416 dev_priv->vbt.lvds_ssc_freq =
417 intel_bios_ssc_frequency(dev, general->ssc_freq);
418 dev_priv->vbt.display_clock_mode = general->display_clock_mode;
419 dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
420 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",
421 dev_priv->vbt.int_tv_support,
422 dev_priv->vbt.int_crt_support,
423 dev_priv->vbt.lvds_use_ssc,
424 dev_priv->vbt.lvds_ssc_freq,
425 dev_priv->vbt.display_clock_mode,
426 dev_priv->vbt.fdi_rx_polarity_inverted);
431 parse_general_definitions(struct drm_i915_private *dev_priv,
432 struct bdb_header *bdb)
434 struct bdb_general_definitions *general;
436 general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
438 u16 block_size = get_blocksize(general);
439 if (block_size >= sizeof(*general)) {
440 int bus_pin = general->crt_ddc_gmbus_pin;
441 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
442 if (intel_gmbus_is_port_valid(bus_pin))
443 dev_priv->vbt.crt_ddc_pin = bus_pin;
445 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
452 parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
453 struct bdb_header *bdb)
455 struct sdvo_device_mapping *p_mapping;
456 struct bdb_general_definitions *p_defs;
457 union child_device_config *p_child;
458 int i, child_device_num, count;
461 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
463 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
466 /* judge whether the size of child device meets the requirements.
467 * If the child device size obtained from general definition block
468 * is different with sizeof(struct child_device_config), skip the
469 * parsing of sdvo device info
471 if (p_defs->child_dev_size != sizeof(*p_child)) {
472 /* different child dev size . Ignore it */
473 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
476 /* get the block size of general definitions */
477 block_size = get_blocksize(p_defs);
478 /* get the number of child device */
479 child_device_num = (block_size - sizeof(*p_defs)) /
482 for (i = 0; i < child_device_num; i++) {
483 p_child = &(p_defs->devices[i]);
484 if (!p_child->old.device_type) {
485 /* skip the device block if device type is invalid */
488 if (p_child->old.slave_addr != SLAVE_ADDR1 &&
489 p_child->old.slave_addr != SLAVE_ADDR2) {
491 * If the slave address is neither 0x70 nor 0x72,
492 * it is not a SDVO device. Skip it.
496 if (p_child->old.dvo_port != DEVICE_PORT_DVOB &&
497 p_child->old.dvo_port != DEVICE_PORT_DVOC) {
498 /* skip the incorrect SDVO port */
499 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
502 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
504 p_child->old.slave_addr,
505 (p_child->old.dvo_port == DEVICE_PORT_DVOB) ?
507 p_mapping = &(dev_priv->sdvo_mappings[p_child->old.dvo_port - 1]);
508 if (!p_mapping->initialized) {
509 p_mapping->dvo_port = p_child->old.dvo_port;
510 p_mapping->slave_addr = p_child->old.slave_addr;
511 p_mapping->dvo_wiring = p_child->old.dvo_wiring;
512 p_mapping->ddc_pin = p_child->old.ddc_pin;
513 p_mapping->i2c_pin = p_child->old.i2c_pin;
514 p_mapping->initialized = 1;
515 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
517 p_mapping->slave_addr,
518 p_mapping->dvo_wiring,
522 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
523 "two SDVO device.\n");
525 if (p_child->old.slave2_addr) {
526 /* Maybe this is a SDVO device with multiple inputs */
527 /* And the mapping info is not added */
528 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
529 " is a SDVO device with multiple inputs.\n");
535 /* No SDVO device info is found */
536 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
542 parse_driver_features(struct drm_i915_private *dev_priv,
543 struct bdb_header *bdb)
545 struct bdb_driver_features *driver;
547 driver = find_section(bdb, BDB_DRIVER_FEATURES);
551 if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
552 dev_priv->vbt.edp_support = 1;
554 if (driver->dual_frequency)
555 dev_priv->render_reclock_avail = true;
557 DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver->drrs_enabled);
559 * If DRRS is not supported, drrs_type has to be set to 0.
560 * This is because, VBT is configured in such a way that
561 * static DRRS is 0 and DRRS not supported is represented by
562 * driver->drrs_enabled=false
564 if (!driver->drrs_enabled)
565 dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
569 parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
572 struct edp_power_seq *edp_pps;
573 struct edp_link_params *edp_link_params;
575 edp = find_section(bdb, BDB_EDP);
577 if (dev_priv->vbt.edp_support)
578 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
582 switch ((edp->color_depth >> (panel_type * 2)) & 3) {
584 dev_priv->vbt.edp_bpp = 18;
587 dev_priv->vbt.edp_bpp = 24;
590 dev_priv->vbt.edp_bpp = 30;
594 /* Get the eDP sequencing and link info */
595 edp_pps = &edp->power_seqs[panel_type];
596 edp_link_params = &edp->link_params[panel_type];
598 dev_priv->vbt.edp_pps = *edp_pps;
600 switch (edp_link_params->rate) {
602 dev_priv->vbt.edp_rate = DP_LINK_BW_1_62;
605 dev_priv->vbt.edp_rate = DP_LINK_BW_2_7;
608 DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n",
609 edp_link_params->rate);
613 switch (edp_link_params->lanes) {
615 dev_priv->vbt.edp_lanes = 1;
618 dev_priv->vbt.edp_lanes = 2;
621 dev_priv->vbt.edp_lanes = 4;
624 DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n",
625 edp_link_params->lanes);
629 switch (edp_link_params->preemphasis) {
630 case EDP_PREEMPHASIS_NONE:
631 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_0;
633 case EDP_PREEMPHASIS_3_5dB:
634 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_1;
636 case EDP_PREEMPHASIS_6dB:
637 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_2;
639 case EDP_PREEMPHASIS_9_5dB:
640 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_3;
643 DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n",
644 edp_link_params->preemphasis);
648 switch (edp_link_params->vswing) {
649 case EDP_VSWING_0_4V:
650 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
652 case EDP_VSWING_0_6V:
653 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_1;
655 case EDP_VSWING_0_8V:
656 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
658 case EDP_VSWING_1_2V:
659 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
662 DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n",
663 edp_link_params->vswing);
668 static u8 *goto_next_sequence(u8 *data, int *size)
676 /* goto first element */
680 case MIPI_SEQ_ELEM_SEND_PKT:
682 * skip by this element payload size
683 * skip elem id, command flag and data type
690 len = *((u16 *)data);
697 data = data + 2 + len;
699 case MIPI_SEQ_ELEM_DELAY:
700 /* skip by elem id, and delay is 4 bytes */
707 case MIPI_SEQ_ELEM_GPIO:
715 DRM_ERROR("Unknown element\n");
719 /* end of sequence ? */
724 /* goto next sequence or end of block byte */
730 /* update amount of data left for the sequence block to be parsed */
736 parse_mipi(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
738 struct bdb_mipi_config *start;
739 struct bdb_mipi_sequence *sequence;
740 struct mipi_config *config;
741 struct mipi_pps_data *pps;
743 int i, panel_id, seq_size;
746 /* parse MIPI blocks only if LFP type is MIPI */
747 if (!dev_priv->vbt.has_mipi)
750 /* Initialize this to undefined indicating no generic MIPI support */
751 dev_priv->vbt.dsi.panel_id = MIPI_DSI_UNDEFINED_PANEL_ID;
753 /* Block #40 is already parsed and panel_fixed_mode is
754 * stored in dev_priv->lfp_lvds_vbt_mode
755 * resuse this when needed
758 /* Parse #52 for panel index used from panel_type already
761 start = find_section(bdb, BDB_MIPI_CONFIG);
763 DRM_DEBUG_KMS("No MIPI config BDB found");
767 DRM_DEBUG_DRIVER("Found MIPI Config block, panel index = %d\n",
771 * get hold of the correct configuration block and pps data as per
772 * the panel_type as index
774 config = &start->config[panel_type];
775 pps = &start->pps[panel_type];
777 /* store as of now full data. Trim when we realise all is not needed */
778 dev_priv->vbt.dsi.config = kmemdup(config, sizeof(struct mipi_config), GFP_KERNEL);
779 if (!dev_priv->vbt.dsi.config)
782 dev_priv->vbt.dsi.pps = kmemdup(pps, sizeof(struct mipi_pps_data), GFP_KERNEL);
783 if (!dev_priv->vbt.dsi.pps) {
784 kfree(dev_priv->vbt.dsi.config);
788 /* We have mandatory mipi config blocks. Initialize as generic panel */
789 dev_priv->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID;
791 /* Check if we have sequence block as well */
792 sequence = find_section(bdb, BDB_MIPI_SEQUENCE);
794 DRM_DEBUG_KMS("No MIPI Sequence found, parsing complete\n");
798 DRM_DEBUG_DRIVER("Found MIPI sequence block\n");
800 block_size = get_blocksize(sequence);
803 * parse the sequence block for individual sequences
805 dev_priv->vbt.dsi.seq_version = sequence->version;
807 seq_data = &sequence->data[0];
810 * sequence block is variable length and hence we need to parse and
811 * get the sequence data for specific panel id
813 for (i = 0; i < MAX_MIPI_CONFIGURATIONS; i++) {
814 panel_id = *seq_data;
815 seq_size = *((u16 *) (seq_data + 1));
816 if (panel_id == panel_type)
819 /* skip the sequence including seq header of 3 bytes */
820 seq_data = seq_data + 3 + seq_size;
821 if ((seq_data - &sequence->data[0]) > block_size) {
822 DRM_ERROR("Sequence start is beyond sequence block size, corrupted sequence block\n");
827 if (i == MAX_MIPI_CONFIGURATIONS) {
828 DRM_ERROR("Sequence block detected but no valid configuration\n");
832 /* check if found sequence is completely within the sequence block
833 * just being paranoid */
834 if (seq_size > block_size) {
835 DRM_ERROR("Corrupted sequence/size, bailing out\n");
839 /* skip the panel id(1 byte) and seq size(2 bytes) */
840 dev_priv->vbt.dsi.data = kmemdup(seq_data + 3, seq_size, GFP_KERNEL);
841 if (!dev_priv->vbt.dsi.data)
845 * loop into the sequence data and split into multiple sequneces
846 * There are only 5 types of sequences as of now
848 data = dev_priv->vbt.dsi.data;
849 dev_priv->vbt.dsi.size = seq_size;
851 /* two consecutive 0x00 indicate end of all sequences */
854 if (MIPI_SEQ_MAX > seq_id && seq_id > MIPI_SEQ_UNDEFINED) {
855 dev_priv->vbt.dsi.sequence[seq_id] = data;
856 DRM_DEBUG_DRIVER("Found mipi sequence - %d\n", seq_id);
858 DRM_ERROR("undefined sequence\n");
862 /* partial parsing to skip elements */
863 data = goto_next_sequence(data, &seq_size);
866 DRM_ERROR("Sequence elements going beyond block itself. Sequence block parsing failed\n");
871 break; /* end of sequence reached */
874 DRM_DEBUG_DRIVER("MIPI related vbt parsing complete\n");
877 kfree(dev_priv->vbt.dsi.data);
878 dev_priv->vbt.dsi.data = NULL;
880 /* error during parsing so set all pointers to null
881 * because of partial parsing */
882 memset(dev_priv->vbt.dsi.sequence, 0, sizeof(dev_priv->vbt.dsi.sequence));
885 static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
886 struct bdb_header *bdb)
888 union child_device_config *it, *child = NULL;
889 struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port];
890 uint8_t hdmi_level_shift;
892 bool is_dvi, is_hdmi, is_dp, is_edp, is_crt;
894 /* Each DDI port can have more than one value on the "DVO Port" field,
895 * so look for all the possible values for each port and abort if more
896 * than one is found. */
897 int dvo_ports[][2] = {
898 {DVO_PORT_HDMIA, DVO_PORT_DPA},
899 {DVO_PORT_HDMIB, DVO_PORT_DPB},
900 {DVO_PORT_HDMIC, DVO_PORT_DPC},
901 {DVO_PORT_HDMID, DVO_PORT_DPD},
902 {DVO_PORT_CRT, -1 /* Port E can only be DVO_PORT_CRT */ },
905 /* Find the child device to use, abort if more than one found. */
906 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
907 it = dev_priv->vbt.child_dev + i;
909 for (j = 0; j < 2; j++) {
910 if (dvo_ports[port][j] == -1)
913 if (it->common.dvo_port == dvo_ports[port][j]) {
915 DRM_DEBUG_KMS("More than one child device for port %c in VBT.\n",
926 aux_channel = child->raw[25];
928 is_dvi = child->common.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
929 is_dp = child->common.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
930 is_crt = child->common.device_type & DEVICE_TYPE_ANALOG_OUTPUT;
931 is_hdmi = is_dvi && (child->common.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
932 is_edp = is_dp && (child->common.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR);
934 info->supports_dvi = is_dvi;
935 info->supports_hdmi = is_hdmi;
936 info->supports_dp = is_dp;
938 DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n",
939 port_name(port), is_dp, is_hdmi, is_dvi, is_edp, is_crt);
941 if (is_edp && is_dvi)
942 DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
944 if (is_crt && port != PORT_E)
945 DRM_DEBUG_KMS("Port %c is analog\n", port_name(port));
946 if (is_crt && (is_dvi || is_dp))
947 DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
949 if (is_dvi && (port == PORT_A || port == PORT_E))
950 DRM_DEBUG_KMS("Port %c is TMDS compatible\n", port_name(port));
951 if (!is_dvi && !is_dp && !is_crt)
952 DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
954 if (is_edp && (port == PORT_B || port == PORT_C || port == PORT_E))
955 DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port));
958 if (child->common.ddc_pin == 0x05 && port != PORT_B)
959 DRM_DEBUG_KMS("Unexpected DDC pin for port B\n");
960 if (child->common.ddc_pin == 0x04 && port != PORT_C)
961 DRM_DEBUG_KMS("Unexpected DDC pin for port C\n");
962 if (child->common.ddc_pin == 0x06 && port != PORT_D)
963 DRM_DEBUG_KMS("Unexpected DDC pin for port D\n");
967 if (aux_channel == 0x40 && port != PORT_A)
968 DRM_DEBUG_KMS("Unexpected AUX channel for port A\n");
969 if (aux_channel == 0x10 && port != PORT_B)
970 DRM_DEBUG_KMS("Unexpected AUX channel for port B\n");
971 if (aux_channel == 0x20 && port != PORT_C)
972 DRM_DEBUG_KMS("Unexpected AUX channel for port C\n");
973 if (aux_channel == 0x30 && port != PORT_D)
974 DRM_DEBUG_KMS("Unexpected AUX channel for port D\n");
977 if (bdb->version >= 158) {
978 /* The VBT HDMI level shift values match the table we have. */
979 hdmi_level_shift = child->raw[7] & 0xF;
980 DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
983 info->hdmi_level_shift = hdmi_level_shift;
987 static void parse_ddi_ports(struct drm_i915_private *dev_priv,
988 struct bdb_header *bdb)
990 struct drm_device *dev = dev_priv->dev;
996 if (!dev_priv->vbt.child_dev_num)
999 if (bdb->version < 155)
1002 for (port = PORT_A; port < I915_MAX_PORTS; port++)
1003 parse_ddi_port(dev_priv, port, bdb);
1007 parse_device_mapping(struct drm_i915_private *dev_priv,
1008 struct bdb_header *bdb)
1010 struct bdb_general_definitions *p_defs;
1011 union child_device_config *p_child, *child_dev_ptr;
1012 int i, child_device_num, count;
1015 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
1017 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
1020 /* judge whether the size of child device meets the requirements.
1021 * If the child device size obtained from general definition block
1022 * is different with sizeof(struct child_device_config), skip the
1023 * parsing of sdvo device info
1025 if (p_defs->child_dev_size != sizeof(*p_child)) {
1026 /* different child dev size . Ignore it */
1027 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
1030 /* get the block size of general definitions */
1031 block_size = get_blocksize(p_defs);
1032 /* get the number of child device */
1033 child_device_num = (block_size - sizeof(*p_defs)) /
1036 /* get the number of child device that is present */
1037 for (i = 0; i < child_device_num; i++) {
1038 p_child = &(p_defs->devices[i]);
1039 if (!p_child->common.device_type) {
1040 /* skip the device block if device type is invalid */
1046 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
1049 dev_priv->vbt.child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL);
1050 if (!dev_priv->vbt.child_dev) {
1051 DRM_DEBUG_KMS("No memory space for child device\n");
1055 dev_priv->vbt.child_dev_num = count;
1057 for (i = 0; i < child_device_num; i++) {
1058 p_child = &(p_defs->devices[i]);
1059 if (!p_child->common.device_type) {
1060 /* skip the device block if device type is invalid */
1064 if (p_child->common.dvo_port >= DVO_PORT_MIPIA
1065 && p_child->common.dvo_port <= DVO_PORT_MIPID
1066 &&p_child->common.device_type & DEVICE_TYPE_MIPI_OUTPUT) {
1067 DRM_DEBUG_KMS("Found MIPI as LFP\n");
1068 dev_priv->vbt.has_mipi = 1;
1069 dev_priv->vbt.dsi.port = p_child->common.dvo_port;
1072 child_dev_ptr = dev_priv->vbt.child_dev + count;
1074 memcpy((void *)child_dev_ptr, (void *)p_child,
1081 init_vbt_defaults(struct drm_i915_private *dev_priv)
1083 struct drm_device *dev = dev_priv->dev;
1086 dev_priv->vbt.crt_ddc_pin = GMBUS_PORT_VGADDC;
1088 /* Default to having backlight */
1089 dev_priv->vbt.backlight.present = true;
1091 /* LFP panel data */
1092 dev_priv->vbt.lvds_dither = 1;
1093 dev_priv->vbt.lvds_vbt = 0;
1095 /* SDVO panel data */
1096 dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
1098 /* general features */
1099 dev_priv->vbt.int_tv_support = 1;
1100 dev_priv->vbt.int_crt_support = 1;
1102 /* Default to using SSC */
1103 dev_priv->vbt.lvds_use_ssc = 1;
1105 * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
1108 dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev,
1109 !HAS_PCH_SPLIT(dev));
1110 DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv->vbt.lvds_ssc_freq);
1112 for (port = PORT_A; port < I915_MAX_PORTS; port++) {
1113 struct ddi_vbt_port_info *info =
1114 &dev_priv->vbt.ddi_port_info[port];
1116 info->hdmi_level_shift = HDMI_LEVEL_SHIFT_UNKNOWN;
1118 info->supports_dvi = (port != PORT_A && port != PORT_E);
1119 info->supports_hdmi = info->supports_dvi;
1120 info->supports_dp = (port != PORT_E);
1124 static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
1126 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
1127 "VBIOS ROM for %s\n",
1132 static const struct dmi_system_id intel_no_opregion_vbt[] = {
1134 .callback = intel_no_opregion_vbt_callback,
1135 .ident = "ThinkCentre A57",
1137 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1138 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
1144 static struct bdb_header *validate_vbt(char *base, size_t size,
1145 struct vbt_header *vbt,
1149 struct bdb_header *bdb;
1152 DRM_DEBUG_DRIVER("VBT signature missing\n");
1156 offset = (char *)vbt - base;
1157 if (offset + sizeof(struct vbt_header) > size) {
1158 DRM_DEBUG_DRIVER("VBT header incomplete\n");
1162 if (memcmp(vbt->signature, "$VBT", 4)) {
1163 DRM_DEBUG_DRIVER("VBT invalid signature\n");
1167 offset += vbt->bdb_offset;
1168 if (offset + sizeof(struct bdb_header) > size) {
1169 DRM_DEBUG_DRIVER("BDB header incomplete\n");
1173 bdb = (struct bdb_header *)(base + offset);
1174 if (offset + bdb->bdb_size > size) {
1175 DRM_DEBUG_DRIVER("BDB incomplete\n");
1179 DRM_DEBUG_KMS("Using VBT from %s: %20s\n",
1180 source, vbt->signature);
1185 * intel_parse_bios - find VBT and initialize settings from the BIOS
1188 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
1189 * to appropriate values.
1191 * Returns 0 on success, nonzero on failure.
1194 intel_parse_bios(struct drm_device *dev)
1196 struct drm_i915_private *dev_priv = dev->dev_private;
1198 struct pci_dev *pdev = dev->pdev;
1200 struct bdb_header *bdb = NULL;
1201 u8 __iomem *bios = NULL;
1203 if (HAS_PCH_NOP(dev))
1206 init_vbt_defaults(dev_priv);
1208 /* XXX Should this validation be moved to intel_opregion.c? */
1209 if (!dmi_check_system(intel_no_opregion_vbt) && dev_priv->opregion.vbt)
1210 bdb = validate_vbt((char *)dev_priv->opregion.header, OPREGION_SIZE,
1211 (struct vbt_header *)dev_priv->opregion.vbt,
1218 bios = pci_map_rom(pdev, &size);
1223 /* Scour memory looking for the VBT signature */
1224 for (i = 0; i + 4 < size; i++) {
1225 if (memcmp(bios + i, "$VBT", 4) == 0) {
1226 bdb = validate_vbt(bios, size,
1227 (struct vbt_header *)(bios + i),
1235 pci_unmap_rom(pdev, bios);
1241 /* Grab useful general definitions */
1242 parse_general_features(dev_priv, bdb);
1243 parse_general_definitions(dev_priv, bdb);
1244 parse_lfp_panel_data(dev_priv, bdb);
1245 parse_lfp_backlight(dev_priv, bdb);
1246 parse_sdvo_panel_data(dev_priv, bdb);
1247 parse_sdvo_device_mapping(dev_priv, bdb);
1248 parse_device_mapping(dev_priv, bdb);
1249 parse_driver_features(dev_priv, bdb);
1250 parse_edp(dev_priv, bdb);
1251 parse_mipi(dev_priv, bdb);
1252 parse_ddi_ports(dev_priv, bdb);
1256 pci_unmap_rom(pdev, bios);
1262 /* Ensure that vital registers have been initialised, even if the BIOS
1263 * is absent or just failing to do its job.
1265 void intel_setup_bios(struct drm_device *dev)
1267 struct drm_i915_private *dev_priv = dev->dev_private;
1269 /* Set the Panel Power On/Off timings if uninitialized. */
1270 if (!HAS_PCH_SPLIT(dev) &&
1271 I915_READ(PP_ON_DELAYS) == 0 && I915_READ(PP_OFF_DELAYS) == 0) {
1272 /* Set T2 to 40ms and T5 to 200ms */
1273 I915_WRITE(PP_ON_DELAYS, 0x019007d0);
1275 /* Set T3 to 35ms and Tx to 200ms */
1276 I915_WRITE(PP_OFF_DELAYS, 0x015e07d0);