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>
28 #include <drm/drm_dp_helper.h>
30 #include <drm/i915_drm.h>
32 #include "intel_bios.h"
34 #define SLAVE_ADDR1 0x70
35 #define SLAVE_ADDR2 0x72
37 static int panel_type;
40 find_section(struct bdb_header *bdb, int section_id)
44 u16 total, current_size;
47 /* skip to first section */
48 index += bdb->header_size;
49 total = bdb->bdb_size;
51 /* walk the sections looking for section_id */
52 while (index < total) {
53 current_id = *(base + index);
55 current_size = *((u16 *)(base + index));
57 if (current_id == section_id)
59 index += current_size;
66 get_blocksize(void *p)
68 u16 *block_ptr, block_size;
70 block_ptr = (u16 *)((char *)p - 2);
71 block_size = *block_ptr;
76 fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
77 const struct lvds_dvo_timing *dvo_timing)
79 panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
80 dvo_timing->hactive_lo;
81 panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
82 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
83 panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
84 dvo_timing->hsync_pulse_width;
85 panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
86 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
88 panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
89 dvo_timing->vactive_lo;
90 panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
91 dvo_timing->vsync_off;
92 panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
93 dvo_timing->vsync_pulse_width;
94 panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
95 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
96 panel_fixed_mode->clock = dvo_timing->clock * 10;
97 panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
99 if (dvo_timing->hsync_positive)
100 panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
102 panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;
104 if (dvo_timing->vsync_positive)
105 panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
107 panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;
109 /* Some VBTs have bogus h/vtotal values */
110 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
111 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
112 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
113 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
115 drm_mode_set_name(panel_fixed_mode);
119 lvds_dvo_timing_equal_size(const struct lvds_dvo_timing *a,
120 const struct lvds_dvo_timing *b)
122 if (a->hactive_hi != b->hactive_hi ||
123 a->hactive_lo != b->hactive_lo)
126 if (a->hsync_off_hi != b->hsync_off_hi ||
127 a->hsync_off_lo != b->hsync_off_lo)
130 if (a->hsync_pulse_width != b->hsync_pulse_width)
133 if (a->hblank_hi != b->hblank_hi ||
134 a->hblank_lo != b->hblank_lo)
137 if (a->vactive_hi != b->vactive_hi ||
138 a->vactive_lo != b->vactive_lo)
141 if (a->vsync_off != b->vsync_off)
144 if (a->vsync_pulse_width != b->vsync_pulse_width)
147 if (a->vblank_hi != b->vblank_hi ||
148 a->vblank_lo != b->vblank_lo)
154 static const struct lvds_dvo_timing *
155 get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
156 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs,
160 * the size of fp_timing varies on the different platform.
161 * So calculate the DVO timing relative offset in LVDS data
162 * entry to get the DVO timing entry
166 lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
167 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
168 int dvo_timing_offset =
169 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
170 lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
171 char *entry = (char *)lvds_lfp_data->data + lfp_data_size * index;
173 return (struct lvds_dvo_timing *)(entry + dvo_timing_offset);
176 /* get lvds_fp_timing entry
177 * this function may return NULL if the corresponding entry is invalid
179 static const struct lvds_fp_timing *
180 get_lvds_fp_timing(const struct bdb_header *bdb,
181 const struct bdb_lvds_lfp_data *data,
182 const struct bdb_lvds_lfp_data_ptrs *ptrs,
185 size_t data_ofs = (const u8 *)data - (const u8 *)bdb;
186 u16 data_size = ((const u16 *)data)[-1]; /* stored in header */
189 if (index >= ARRAY_SIZE(ptrs->ptr))
191 ofs = ptrs->ptr[index].fp_timing_offset;
192 if (ofs < data_ofs ||
193 ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size)
195 return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs);
198 /* Try to find integrated panel data */
200 parse_lfp_panel_data(struct drm_i915_private *dev_priv,
201 struct bdb_header *bdb)
203 const struct bdb_lvds_options *lvds_options;
204 const struct bdb_lvds_lfp_data *lvds_lfp_data;
205 const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
206 const struct lvds_dvo_timing *panel_dvo_timing;
207 const struct lvds_fp_timing *fp_timing;
208 struct drm_display_mode *panel_fixed_mode;
211 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
215 dev_priv->vbt.lvds_dither = lvds_options->pixel_dither;
216 if (lvds_options->panel_type == 0xff)
219 panel_type = lvds_options->panel_type;
221 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
225 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
226 if (!lvds_lfp_data_ptrs)
229 dev_priv->vbt.lvds_vbt = 1;
231 panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
233 lvds_options->panel_type);
235 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
236 if (!panel_fixed_mode)
239 fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);
241 dev_priv->vbt.lfp_lvds_vbt_mode = panel_fixed_mode;
243 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
244 drm_mode_debug_printmodeline(panel_fixed_mode);
247 * Iterate over the LVDS panel timing info to find the lowest clock
248 * for the native resolution.
250 downclock = panel_dvo_timing->clock;
251 for (i = 0; i < 16; i++) {
252 const struct lvds_dvo_timing *dvo_timing;
254 dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
257 if (lvds_dvo_timing_equal_size(dvo_timing, panel_dvo_timing) &&
258 dvo_timing->clock < downclock)
259 downclock = dvo_timing->clock;
262 if (downclock < panel_dvo_timing->clock && i915_lvds_downclock) {
263 dev_priv->lvds_downclock_avail = 1;
264 dev_priv->lvds_downclock = downclock * 10;
265 DRM_DEBUG_KMS("LVDS downclock is found in VBT. "
266 "Normal Clock %dKHz, downclock %dKHz\n",
267 panel_fixed_mode->clock, 10*downclock);
270 fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data,
272 lvds_options->panel_type);
274 /* check the resolution, just to be sure */
275 if (fp_timing->x_res == panel_fixed_mode->hdisplay &&
276 fp_timing->y_res == panel_fixed_mode->vdisplay) {
277 dev_priv->vbt.bios_lvds_val = fp_timing->lvds_reg_val;
278 DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
279 dev_priv->vbt.bios_lvds_val);
284 /* Try to find sdvo panel data */
286 parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
287 struct bdb_header *bdb)
289 struct lvds_dvo_timing *dvo_timing;
290 struct drm_display_mode *panel_fixed_mode;
293 index = i915_vbt_sdvo_panel_type;
295 DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
300 struct bdb_sdvo_lvds_options *sdvo_lvds_options;
302 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
303 if (!sdvo_lvds_options)
306 index = sdvo_lvds_options->panel_type;
309 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
313 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
314 if (!panel_fixed_mode)
317 fill_detail_timing_data(panel_fixed_mode, dvo_timing + index);
319 dev_priv->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode;
321 DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
322 drm_mode_debug_printmodeline(panel_fixed_mode);
325 static int intel_bios_ssc_frequency(struct drm_device *dev,
328 switch (INTEL_INFO(dev)->gen) {
330 return alternate ? 66 : 48;
333 return alternate ? 100 : 96;
335 return alternate ? 100 : 120;
340 parse_general_features(struct drm_i915_private *dev_priv,
341 struct bdb_header *bdb)
343 struct drm_device *dev = dev_priv->dev;
344 struct bdb_general_features *general;
346 general = find_section(bdb, BDB_GENERAL_FEATURES);
348 dev_priv->vbt.int_tv_support = general->int_tv_support;
349 dev_priv->vbt.int_crt_support = general->int_crt_support;
350 dev_priv->vbt.lvds_use_ssc = general->enable_ssc;
351 dev_priv->vbt.lvds_ssc_freq =
352 intel_bios_ssc_frequency(dev, general->ssc_freq);
353 dev_priv->vbt.display_clock_mode = general->display_clock_mode;
354 dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
355 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",
356 dev_priv->vbt.int_tv_support,
357 dev_priv->vbt.int_crt_support,
358 dev_priv->vbt.lvds_use_ssc,
359 dev_priv->vbt.lvds_ssc_freq,
360 dev_priv->vbt.display_clock_mode,
361 dev_priv->vbt.fdi_rx_polarity_inverted);
366 parse_general_definitions(struct drm_i915_private *dev_priv,
367 struct bdb_header *bdb)
369 struct bdb_general_definitions *general;
371 general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
373 u16 block_size = get_blocksize(general);
374 if (block_size >= sizeof(*general)) {
375 int bus_pin = general->crt_ddc_gmbus_pin;
376 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
377 if (intel_gmbus_is_port_valid(bus_pin))
378 dev_priv->vbt.crt_ddc_pin = bus_pin;
380 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
387 parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
388 struct bdb_header *bdb)
390 struct sdvo_device_mapping *p_mapping;
391 struct bdb_general_definitions *p_defs;
392 union child_device_config *p_child;
393 int i, child_device_num, count;
396 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
398 DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
401 /* judge whether the size of child device meets the requirements.
402 * If the child device size obtained from general definition block
403 * is different with sizeof(struct child_device_config), skip the
404 * parsing of sdvo device info
406 if (p_defs->child_dev_size != sizeof(*p_child)) {
407 /* different child dev size . Ignore it */
408 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
411 /* get the block size of general definitions */
412 block_size = get_blocksize(p_defs);
413 /* get the number of child device */
414 child_device_num = (block_size - sizeof(*p_defs)) /
417 for (i = 0; i < child_device_num; i++) {
418 p_child = &(p_defs->devices[i]);
419 if (!p_child->old.device_type) {
420 /* skip the device block if device type is invalid */
423 if (p_child->old.slave_addr != SLAVE_ADDR1 &&
424 p_child->old.slave_addr != SLAVE_ADDR2) {
426 * If the slave address is neither 0x70 nor 0x72,
427 * it is not a SDVO device. Skip it.
431 if (p_child->old.dvo_port != DEVICE_PORT_DVOB &&
432 p_child->old.dvo_port != DEVICE_PORT_DVOC) {
433 /* skip the incorrect SDVO port */
434 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
437 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
439 p_child->old.slave_addr,
440 (p_child->old.dvo_port == DEVICE_PORT_DVOB) ?
442 p_mapping = &(dev_priv->sdvo_mappings[p_child->old.dvo_port - 1]);
443 if (!p_mapping->initialized) {
444 p_mapping->dvo_port = p_child->old.dvo_port;
445 p_mapping->slave_addr = p_child->old.slave_addr;
446 p_mapping->dvo_wiring = p_child->old.dvo_wiring;
447 p_mapping->ddc_pin = p_child->old.ddc_pin;
448 p_mapping->i2c_pin = p_child->old.i2c_pin;
449 p_mapping->initialized = 1;
450 DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
452 p_mapping->slave_addr,
453 p_mapping->dvo_wiring,
457 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
458 "two SDVO device.\n");
460 if (p_child->old.slave2_addr) {
461 /* Maybe this is a SDVO device with multiple inputs */
462 /* And the mapping info is not added */
463 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
464 " is a SDVO device with multiple inputs.\n");
470 /* No SDVO device info is found */
471 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
477 parse_driver_features(struct drm_i915_private *dev_priv,
478 struct bdb_header *bdb)
480 struct bdb_driver_features *driver;
482 driver = find_section(bdb, BDB_DRIVER_FEATURES);
486 if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
487 dev_priv->vbt.edp_support = 1;
489 if (driver->dual_frequency)
490 dev_priv->render_reclock_avail = true;
494 parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
497 struct edp_power_seq *edp_pps;
498 struct edp_link_params *edp_link_params;
500 edp = find_section(bdb, BDB_EDP);
502 if (dev_priv->vbt.edp_support)
503 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
507 switch ((edp->color_depth >> (panel_type * 2)) & 3) {
509 dev_priv->vbt.edp_bpp = 18;
512 dev_priv->vbt.edp_bpp = 24;
515 dev_priv->vbt.edp_bpp = 30;
519 /* Get the eDP sequencing and link info */
520 edp_pps = &edp->power_seqs[panel_type];
521 edp_link_params = &edp->link_params[panel_type];
523 dev_priv->vbt.edp_pps = *edp_pps;
525 dev_priv->vbt.edp_rate = edp_link_params->rate ? DP_LINK_BW_2_7 :
527 switch (edp_link_params->lanes) {
529 dev_priv->vbt.edp_lanes = 1;
532 dev_priv->vbt.edp_lanes = 2;
536 dev_priv->vbt.edp_lanes = 4;
539 switch (edp_link_params->preemphasis) {
541 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_0;
544 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_3_5;
547 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_6;
550 dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_9_5;
553 switch (edp_link_params->vswing) {
555 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_400;
558 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_600;
561 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_800;
564 dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_1200;
570 parse_mipi(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
572 struct bdb_mipi *mipi;
574 mipi = find_section(bdb, BDB_MIPI);
576 DRM_DEBUG_KMS("No MIPI BDB found");
580 /* XXX: add more info */
581 dev_priv->vbt.dsi.panel_id = mipi->panel_id;
584 static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
585 struct bdb_header *bdb)
587 union child_device_config *it, *child = NULL;
588 struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port];
589 uint8_t hdmi_level_shift;
591 bool is_dvi, is_hdmi, is_dp, is_edp, is_crt;
593 /* Each DDI port can have more than one value on the "DVO Port" field,
594 * so look for all the possible values for each port and abort if more
595 * than one is found. */
596 int dvo_ports[][2] = {
597 {DVO_PORT_HDMIA, DVO_PORT_DPA},
598 {DVO_PORT_HDMIB, DVO_PORT_DPB},
599 {DVO_PORT_HDMIC, DVO_PORT_DPC},
600 {DVO_PORT_HDMID, DVO_PORT_DPD},
601 {DVO_PORT_CRT, -1 /* Port E can only be DVO_PORT_CRT */ },
604 /* Find the child device to use, abort if more than one found. */
605 for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
606 it = dev_priv->vbt.child_dev + i;
608 for (j = 0; j < 2; j++) {
609 if (dvo_ports[port][j] == -1)
612 if (it->common.dvo_port == dvo_ports[port][j]) {
614 DRM_DEBUG_KMS("More than one child device for port %c in VBT.\n",
625 aux_channel = child->raw[25];
627 is_dvi = child->common.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
628 is_dp = child->common.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
629 is_crt = child->common.device_type & DEVICE_TYPE_ANALOG_OUTPUT;
630 is_hdmi = is_dvi && (child->common.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
631 is_edp = is_dp && (child->common.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR);
633 info->supports_dvi = is_dvi;
634 info->supports_hdmi = is_hdmi;
635 info->supports_dp = is_dp;
637 DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n",
638 port_name(port), is_dp, is_hdmi, is_dvi, is_edp, is_crt);
640 if (is_edp && is_dvi)
641 DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
643 if (is_crt && port != PORT_E)
644 DRM_DEBUG_KMS("Port %c is analog\n", port_name(port));
645 if (is_crt && (is_dvi || is_dp))
646 DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
648 if (is_dvi && (port == PORT_A || port == PORT_E))
649 DRM_DEBUG_KMS("Port %c is TMDS compabile\n", port_name(port));
650 if (!is_dvi && !is_dp && !is_crt)
651 DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
653 if (is_edp && (port == PORT_B || port == PORT_C || port == PORT_E))
654 DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port));
657 if (child->common.ddc_pin == 0x05 && port != PORT_B)
658 DRM_DEBUG_KMS("Unexpected DDC pin for port B\n");
659 if (child->common.ddc_pin == 0x04 && port != PORT_C)
660 DRM_DEBUG_KMS("Unexpected DDC pin for port C\n");
661 if (child->common.ddc_pin == 0x06 && port != PORT_D)
662 DRM_DEBUG_KMS("Unexpected DDC pin for port D\n");
666 if (aux_channel == 0x40 && port != PORT_A)
667 DRM_DEBUG_KMS("Unexpected AUX channel for port A\n");
668 if (aux_channel == 0x10 && port != PORT_B)
669 DRM_DEBUG_KMS("Unexpected AUX channel for port B\n");
670 if (aux_channel == 0x20 && port != PORT_C)
671 DRM_DEBUG_KMS("Unexpected AUX channel for port C\n");
672 if (aux_channel == 0x30 && port != PORT_D)
673 DRM_DEBUG_KMS("Unexpected AUX channel for port D\n");
676 if (bdb->version >= 158) {
677 /* The VBT HDMI level shift values match the table we have. */
678 hdmi_level_shift = child->raw[7] & 0xF;
679 if (hdmi_level_shift < 0xC) {
680 DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
683 info->hdmi_level_shift = hdmi_level_shift;
688 static void parse_ddi_ports(struct drm_i915_private *dev_priv,
689 struct bdb_header *bdb)
691 struct drm_device *dev = dev_priv->dev;
697 if (!dev_priv->vbt.child_dev_num)
700 if (bdb->version < 155)
703 for (port = PORT_A; port < I915_MAX_PORTS; port++)
704 parse_ddi_port(dev_priv, port, bdb);
708 parse_device_mapping(struct drm_i915_private *dev_priv,
709 struct bdb_header *bdb)
711 struct bdb_general_definitions *p_defs;
712 union child_device_config *p_child, *child_dev_ptr;
713 int i, child_device_num, count;
716 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
718 DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
721 /* judge whether the size of child device meets the requirements.
722 * If the child device size obtained from general definition block
723 * is different with sizeof(struct child_device_config), skip the
724 * parsing of sdvo device info
726 if (p_defs->child_dev_size != sizeof(*p_child)) {
727 /* different child dev size . Ignore it */
728 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
731 /* get the block size of general definitions */
732 block_size = get_blocksize(p_defs);
733 /* get the number of child device */
734 child_device_num = (block_size - sizeof(*p_defs)) /
737 /* get the number of child device that is present */
738 for (i = 0; i < child_device_num; i++) {
739 p_child = &(p_defs->devices[i]);
740 if (!p_child->common.device_type) {
741 /* skip the device block if device type is invalid */
747 DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
750 dev_priv->vbt.child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL);
751 if (!dev_priv->vbt.child_dev) {
752 DRM_DEBUG_KMS("No memory space for child device\n");
756 dev_priv->vbt.child_dev_num = count;
758 for (i = 0; i < child_device_num; i++) {
759 p_child = &(p_defs->devices[i]);
760 if (!p_child->common.device_type) {
761 /* skip the device block if device type is invalid */
764 child_dev_ptr = dev_priv->vbt.child_dev + count;
766 memcpy((void *)child_dev_ptr, (void *)p_child,
773 init_vbt_defaults(struct drm_i915_private *dev_priv)
775 struct drm_device *dev = dev_priv->dev;
778 dev_priv->vbt.crt_ddc_pin = GMBUS_PORT_VGADDC;
781 dev_priv->vbt.lvds_dither = 1;
782 dev_priv->vbt.lvds_vbt = 0;
784 /* SDVO panel data */
785 dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;
787 /* general features */
788 dev_priv->vbt.int_tv_support = 1;
789 dev_priv->vbt.int_crt_support = 1;
791 /* Default to using SSC */
792 dev_priv->vbt.lvds_use_ssc = 1;
794 * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
797 dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev,
798 !HAS_PCH_SPLIT(dev));
799 DRM_DEBUG_KMS("Set default to SSC at %dMHz\n", dev_priv->vbt.lvds_ssc_freq);
801 for (port = PORT_A; port < I915_MAX_PORTS; port++) {
802 struct ddi_vbt_port_info *info =
803 &dev_priv->vbt.ddi_port_info[port];
805 /* Recommended BSpec default: 800mV 0dB. */
806 info->hdmi_level_shift = 6;
808 info->supports_dvi = (port != PORT_A && port != PORT_E);
809 info->supports_hdmi = info->supports_dvi;
810 info->supports_dp = (port != PORT_E);
814 static int __init intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
816 DRM_DEBUG_KMS("Falling back to manually reading VBT from "
817 "VBIOS ROM for %s\n",
822 static const struct dmi_system_id intel_no_opregion_vbt[] = {
824 .callback = intel_no_opregion_vbt_callback,
825 .ident = "ThinkCentre A57",
827 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
828 DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
835 * intel_parse_bios - find VBT and initialize settings from the BIOS
838 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
839 * to appropriate values.
841 * Returns 0 on success, nonzero on failure.
844 intel_parse_bios(struct drm_device *dev)
846 struct drm_i915_private *dev_priv = dev->dev_private;
847 struct pci_dev *pdev = dev->pdev;
848 struct bdb_header *bdb = NULL;
849 u8 __iomem *bios = NULL;
851 if (HAS_PCH_NOP(dev))
854 init_vbt_defaults(dev_priv);
856 /* XXX Should this validation be moved to intel_opregion.c? */
857 if (!dmi_check_system(intel_no_opregion_vbt) && dev_priv->opregion.vbt) {
858 struct vbt_header *vbt = dev_priv->opregion.vbt;
859 if (memcmp(vbt->signature, "$VBT", 4) == 0) {
860 DRM_DEBUG_KMS("Using VBT from OpRegion: %20s\n",
862 bdb = (struct bdb_header *)((char *)vbt + vbt->bdb_offset);
864 dev_priv->opregion.vbt = NULL;
868 struct vbt_header *vbt = NULL;
872 bios = pci_map_rom(pdev, &size);
876 /* Scour memory looking for the VBT signature */
877 for (i = 0; i + 4 < size; i++) {
878 if (!memcmp(bios + i, "$VBT", 4)) {
879 vbt = (struct vbt_header *)(bios + i);
885 DRM_DEBUG_DRIVER("VBT signature missing\n");
886 pci_unmap_rom(pdev, bios);
890 bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset);
893 /* Grab useful general definitions */
894 parse_general_features(dev_priv, bdb);
895 parse_general_definitions(dev_priv, bdb);
896 parse_lfp_panel_data(dev_priv, bdb);
897 parse_sdvo_panel_data(dev_priv, bdb);
898 parse_sdvo_device_mapping(dev_priv, bdb);
899 parse_device_mapping(dev_priv, bdb);
900 parse_driver_features(dev_priv, bdb);
901 parse_edp(dev_priv, bdb);
902 parse_mipi(dev_priv, bdb);
903 parse_ddi_ports(dev_priv, bdb);
906 pci_unmap_rom(pdev, bios);
911 /* Ensure that vital registers have been initialised, even if the BIOS
912 * is absent or just failing to do its job.
914 void intel_setup_bios(struct drm_device *dev)
916 struct drm_i915_private *dev_priv = dev->dev_private;
918 /* Set the Panel Power On/Off timings if uninitialized. */
919 if (!HAS_PCH_SPLIT(dev) &&
920 I915_READ(PP_ON_DELAYS) == 0 && I915_READ(PP_OFF_DELAYS) == 0) {
921 /* Set T2 to 40ms and T5 to 200ms */
922 I915_WRITE(PP_ON_DELAYS, 0x019007d0);
924 /* Set T3 to 35ms and Tx to 200ms */
925 I915_WRITE(PP_OFF_DELAYS, 0x015e07d0);