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>
31 #include "intel_bios.h"
33 #define SLAVE_ADDR1 0x70
34 #define SLAVE_ADDR2 0x72
36 static int panel_type;
39 find_section(struct bdb_header *bdb, int section_id)
43 u16 total, current_size;
46 /* skip to first section */
47 index += bdb->header_size;
48 total = bdb->bdb_size;
50 /* walk the sections looking for section_id */
51 while (index < total) {
52 current_id = *(base + index);
54 current_size = *((u16 *)(base + index));
56 if (current_id == section_id)
58 index += current_size;
65 get_blocksize(void *p)
67 u16 *block_ptr, block_size;
69 block_ptr = (u16 *)((char *)p - 2);
70 block_size = *block_ptr;
75 fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
76 struct lvds_dvo_timing *dvo_timing)
78 panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
79 dvo_timing->hactive_lo;
80 panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
81 ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
82 panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
83 dvo_timing->hsync_pulse_width;
84 panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
85 ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
87 panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
88 dvo_timing->vactive_lo;
89 panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
90 dvo_timing->vsync_off;
91 panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
92 dvo_timing->vsync_pulse_width;
93 panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
94 ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
95 panel_fixed_mode->clock = dvo_timing->clock * 10;
96 panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
98 /* Some VBTs have bogus h/vtotal values */
99 if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
100 panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
101 if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
102 panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
104 drm_mode_set_name(panel_fixed_mode);
107 /* Try to find integrated panel data */
109 parse_lfp_panel_data(struct drm_i915_private *dev_priv,
110 struct bdb_header *bdb)
112 struct bdb_lvds_options *lvds_options;
113 struct bdb_lvds_lfp_data *lvds_lfp_data;
114 struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
115 struct bdb_lvds_lfp_data_entry *entry;
116 struct lvds_dvo_timing *dvo_timing;
117 struct drm_display_mode *panel_fixed_mode;
118 int lfp_data_size, dvo_timing_offset;
119 int i, temp_downclock;
120 struct drm_display_mode *temp_mode;
122 /* Defaults if we can't find VBT info */
123 dev_priv->lvds_dither = 0;
124 dev_priv->lvds_vbt = 0;
126 lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
130 dev_priv->lvds_dither = lvds_options->pixel_dither;
131 if (lvds_options->panel_type == 0xff)
133 panel_type = lvds_options->panel_type;
135 lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
139 lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
140 if (!lvds_lfp_data_ptrs)
143 dev_priv->lvds_vbt = 1;
145 lfp_data_size = lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
146 lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
147 entry = (struct bdb_lvds_lfp_data_entry *)
148 ((uint8_t *)lvds_lfp_data->data + (lfp_data_size *
149 lvds_options->panel_type));
150 dvo_timing_offset = lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
151 lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
154 * the size of fp_timing varies on the different platform.
155 * So calculate the DVO timing relative offset in LVDS data
156 * entry to get the DVO timing entry
158 dvo_timing = (struct lvds_dvo_timing *)
159 ((unsigned char *)entry + dvo_timing_offset);
161 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
163 fill_detail_timing_data(panel_fixed_mode, dvo_timing);
165 dev_priv->lfp_lvds_vbt_mode = panel_fixed_mode;
167 DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
168 drm_mode_debug_printmodeline(panel_fixed_mode);
170 temp_mode = kzalloc(sizeof(*temp_mode), GFP_KERNEL);
171 temp_downclock = panel_fixed_mode->clock;
173 * enumerate the LVDS panel timing info entry in VBT to check whether
174 * the LVDS downclock is found.
176 for (i = 0; i < 16; i++) {
177 entry = (struct bdb_lvds_lfp_data_entry *)
178 ((uint8_t *)lvds_lfp_data->data + (lfp_data_size * i));
179 dvo_timing = (struct lvds_dvo_timing *)
180 ((unsigned char *)entry + dvo_timing_offset);
182 fill_detail_timing_data(temp_mode, dvo_timing);
184 if (temp_mode->hdisplay == panel_fixed_mode->hdisplay &&
185 temp_mode->hsync_start == panel_fixed_mode->hsync_start &&
186 temp_mode->hsync_end == panel_fixed_mode->hsync_end &&
187 temp_mode->htotal == panel_fixed_mode->htotal &&
188 temp_mode->vdisplay == panel_fixed_mode->vdisplay &&
189 temp_mode->vsync_start == panel_fixed_mode->vsync_start &&
190 temp_mode->vsync_end == panel_fixed_mode->vsync_end &&
191 temp_mode->vtotal == panel_fixed_mode->vtotal &&
192 temp_mode->clock < temp_downclock) {
194 * downclock is already found. But we expect
195 * to find the lower downclock.
197 temp_downclock = temp_mode->clock;
199 /* clear it to zero */
200 memset(temp_mode, 0, sizeof(*temp_mode));
203 if (temp_downclock < panel_fixed_mode->clock &&
204 i915_lvds_downclock) {
205 dev_priv->lvds_downclock_avail = 1;
206 dev_priv->lvds_downclock = temp_downclock;
207 DRM_DEBUG_KMS("LVDS downclock is found in VBT. ",
208 "Normal Clock %dKHz, downclock %dKHz\n",
209 temp_downclock, panel_fixed_mode->clock);
214 /* Try to find sdvo panel data */
216 parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
217 struct bdb_header *bdb)
219 struct bdb_sdvo_lvds_options *sdvo_lvds_options;
220 struct lvds_dvo_timing *dvo_timing;
221 struct drm_display_mode *panel_fixed_mode;
223 dev_priv->sdvo_lvds_vbt_mode = NULL;
225 sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
226 if (!sdvo_lvds_options)
229 dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
233 panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
235 if (!panel_fixed_mode)
238 fill_detail_timing_data(panel_fixed_mode,
239 dvo_timing + sdvo_lvds_options->panel_type);
241 dev_priv->sdvo_lvds_vbt_mode = panel_fixed_mode;
247 parse_general_features(struct drm_i915_private *dev_priv,
248 struct bdb_header *bdb)
250 struct drm_device *dev = dev_priv->dev;
251 struct bdb_general_features *general;
253 /* Set sensible defaults in case we can't find the general block */
254 dev_priv->int_tv_support = 1;
255 dev_priv->int_crt_support = 1;
257 general = find_section(bdb, BDB_GENERAL_FEATURES);
259 dev_priv->int_tv_support = general->int_tv_support;
260 dev_priv->int_crt_support = general->int_crt_support;
261 dev_priv->lvds_use_ssc = general->enable_ssc;
263 if (dev_priv->lvds_use_ssc) {
264 if (IS_I85X(dev_priv->dev))
265 dev_priv->lvds_ssc_freq =
266 general->ssc_freq ? 66 : 48;
267 else if (IS_IRONLAKE(dev_priv->dev) || IS_GEN6(dev))
268 dev_priv->lvds_ssc_freq =
269 general->ssc_freq ? 100 : 120;
271 dev_priv->lvds_ssc_freq =
272 general->ssc_freq ? 100 : 96;
278 parse_general_definitions(struct drm_i915_private *dev_priv,
279 struct bdb_header *bdb)
281 struct bdb_general_definitions *general;
282 const int crt_bus_map_table[] = {
291 general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
293 u16 block_size = get_blocksize(general);
294 if (block_size >= sizeof(*general)) {
295 int bus_pin = general->crt_ddc_gmbus_pin;
296 DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
297 if ((bus_pin >= 1) && (bus_pin <= 6)) {
298 dev_priv->crt_ddc_bus =
299 crt_bus_map_table[bus_pin-1];
302 DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
309 parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
310 struct bdb_header *bdb)
312 struct sdvo_device_mapping *p_mapping;
313 struct bdb_general_definitions *p_defs;
314 struct child_device_config *p_child;
315 int i, child_device_num, count;
318 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
320 DRM_DEBUG_KMS("No general definition block is found\n");
323 /* judge whether the size of child device meets the requirements.
324 * If the child device size obtained from general definition block
325 * is different with sizeof(struct child_device_config), skip the
326 * parsing of sdvo device info
328 if (p_defs->child_dev_size != sizeof(*p_child)) {
329 /* different child dev size . Ignore it */
330 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
333 /* get the block size of general definitions */
334 block_size = get_blocksize(p_defs);
335 /* get the number of child device */
336 child_device_num = (block_size - sizeof(*p_defs)) /
339 for (i = 0; i < child_device_num; i++) {
340 p_child = &(p_defs->devices[i]);
341 if (!p_child->device_type) {
342 /* skip the device block if device type is invalid */
345 if (p_child->slave_addr != SLAVE_ADDR1 &&
346 p_child->slave_addr != SLAVE_ADDR2) {
348 * If the slave address is neither 0x70 nor 0x72,
349 * it is not a SDVO device. Skip it.
353 if (p_child->dvo_port != DEVICE_PORT_DVOB &&
354 p_child->dvo_port != DEVICE_PORT_DVOC) {
355 /* skip the incorrect SDVO port */
356 DRM_DEBUG_KMS("Incorrect SDVO port. Skip it \n");
359 DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
362 (p_child->dvo_port == DEVICE_PORT_DVOB) ?
364 p_mapping = &(dev_priv->sdvo_mappings[p_child->dvo_port - 1]);
365 if (!p_mapping->initialized) {
366 p_mapping->dvo_port = p_child->dvo_port;
367 p_mapping->slave_addr = p_child->slave_addr;
368 p_mapping->dvo_wiring = p_child->dvo_wiring;
369 p_mapping->initialized = 1;
371 DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
372 "two SDVO device.\n");
374 if (p_child->slave2_addr) {
375 /* Maybe this is a SDVO device with multiple inputs */
376 /* And the mapping info is not added */
377 DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
378 " is a SDVO device with multiple inputs.\n");
384 /* No SDVO device info is found */
385 DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
391 parse_driver_features(struct drm_i915_private *dev_priv,
392 struct bdb_header *bdb)
394 struct drm_device *dev = dev_priv->dev;
395 struct bdb_driver_features *driver;
397 driver = find_section(bdb, BDB_DRIVER_FEATURES);
401 if (driver && SUPPORTS_EDP(dev) &&
402 driver->lvds_config == BDB_DRIVER_FEATURE_EDP) {
403 dev_priv->edp_support = 1;
405 dev_priv->edp_support = 0;
408 if (driver && driver->dual_frequency)
409 dev_priv->render_reclock_avail = true;
413 parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
417 edp = find_section(bdb, BDB_EDP);
419 if (SUPPORTS_EDP(dev_priv->dev) && dev_priv->edp_support) {
420 DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported,\
421 assume 18bpp panel color depth.\n");
422 dev_priv->edp_bpp = 18;
427 switch ((edp->color_depth >> (panel_type * 2)) & 3) {
429 dev_priv->edp_bpp = 18;
432 dev_priv->edp_bpp = 24;
435 dev_priv->edp_bpp = 30;
441 parse_device_mapping(struct drm_i915_private *dev_priv,
442 struct bdb_header *bdb)
444 struct bdb_general_definitions *p_defs;
445 struct child_device_config *p_child, *child_dev_ptr;
446 int i, child_device_num, count;
449 p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
451 DRM_DEBUG_KMS("No general definition block is found\n");
454 /* judge whether the size of child device meets the requirements.
455 * If the child device size obtained from general definition block
456 * is different with sizeof(struct child_device_config), skip the
457 * parsing of sdvo device info
459 if (p_defs->child_dev_size != sizeof(*p_child)) {
460 /* different child dev size . Ignore it */
461 DRM_DEBUG_KMS("different child size is found. Invalid.\n");
464 /* get the block size of general definitions */
465 block_size = get_blocksize(p_defs);
466 /* get the number of child device */
467 child_device_num = (block_size - sizeof(*p_defs)) /
470 /* get the number of child device that is present */
471 for (i = 0; i < child_device_num; i++) {
472 p_child = &(p_defs->devices[i]);
473 if (!p_child->device_type) {
474 /* skip the device block if device type is invalid */
480 DRM_DEBUG_KMS("no child dev is parsed from VBT \n");
483 dev_priv->child_dev = kzalloc(sizeof(*p_child) * count, GFP_KERNEL);
484 if (!dev_priv->child_dev) {
485 DRM_DEBUG_KMS("No memory space for child device\n");
489 dev_priv->child_dev_num = count;
491 for (i = 0; i < child_device_num; i++) {
492 p_child = &(p_defs->devices[i]);
493 if (!p_child->device_type) {
494 /* skip the device block if device type is invalid */
497 child_dev_ptr = dev_priv->child_dev + count;
499 memcpy((void *)child_dev_ptr, (void *)p_child,
505 * intel_init_bios - initialize VBIOS settings & find VBT
508 * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
509 * to appropriate values.
511 * VBT existence is a sanity check that is relied on by other i830_bios.c code.
512 * Note that it would be better to use a BIOS call to get the VBT, as BIOSes may
513 * feed an updated VBT back through that, compared to what we'll fetch using
514 * this method of groping around in the BIOS data.
516 * Returns 0 on success, nonzero on failure.
519 intel_init_bios(struct drm_device *dev)
521 struct drm_i915_private *dev_priv = dev->dev_private;
522 struct pci_dev *pdev = dev->pdev;
523 struct vbt_header *vbt = NULL;
524 struct bdb_header *bdb;
529 bios = pci_map_rom(pdev, &size);
533 /* Scour memory looking for the VBT signature */
534 for (i = 0; i + 4 < size; i++) {
535 if (!memcmp(bios + i, "$VBT", 4)) {
536 vbt = (struct vbt_header *)(bios + i);
542 DRM_ERROR("VBT signature missing\n");
543 pci_unmap_rom(pdev, bios);
547 bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset);
549 /* Grab useful general definitions */
550 parse_general_features(dev_priv, bdb);
551 parse_general_definitions(dev_priv, bdb);
552 parse_lfp_panel_data(dev_priv, bdb);
553 parse_sdvo_panel_data(dev_priv, bdb);
554 parse_sdvo_device_mapping(dev_priv, bdb);
555 parse_device_mapping(dev_priv, bdb);
556 parse_driver_features(dev_priv, bdb);
557 parse_edp(dev_priv, bdb);
559 pci_unmap_rom(pdev, bios);