1 | /* |
2 | * Copyright © 2006 Intel Corporation |
3 | * |
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: |
10 | * |
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 |
13 | * Software. |
14 | * |
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 |
21 | * SOFTWARE. |
22 | * |
23 | * Authors: |
24 | * Eric Anholt <eric@anholt.net> |
25 | * |
26 | */ |
27 | #include <linux/dmi.h> |
28 | #include <drm/drm_dp_helper.h> |
29 | #include <drm/drmP.h> |
30 | #include <drm/i915_drm.h> |
31 | #include "i915_drv.h" |
32 | #include "intel_bios.h" |
33 | |
34 | #define SLAVE_ADDR1 0x70 |
35 | #define SLAVE_ADDR2 0x72 |
36 | |
37 | static int panel_type; |
38 | |
39 | static void * |
40 | find_section(struct bdb_header *bdb, int section_id) |
41 | { |
42 | u8 *base = (u8 *)bdb; |
43 | int index = 0; |
44 | u16 total, current_size; |
45 | u8 current_id; |
46 | |
47 | /* skip to first section */ |
48 | index += bdb->header_size; |
49 | total = bdb->bdb_size; |
50 | |
51 | /* walk the sections looking for section_id */ |
52 | while (index < total) { |
53 | current_id = *(base + index); |
54 | index++; |
55 | current_size = *((u16 *)(base + index)); |
56 | index += 2; |
57 | if (current_id == section_id) |
58 | return base + index; |
59 | index += current_size; |
60 | } |
61 | |
62 | return NULL; |
63 | } |
64 | |
65 | static u16 |
66 | get_blocksize(void *p) |
67 | { |
68 | u16 *block_ptr, block_size; |
69 | |
70 | block_ptr = (u16 *)((char *)p - 2); |
71 | block_size = *block_ptr; |
72 | return block_size; |
73 | } |
74 | |
75 | static void |
76 | fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode, |
77 | const struct lvds_dvo_timing *dvo_timing) |
78 | { |
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); |
87 | |
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; |
98 | |
99 | if (dvo_timing->hsync_positive) |
100 | panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC; |
101 | else |
102 | panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC; |
103 | |
104 | if (dvo_timing->vsync_positive) |
105 | panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC; |
106 | else |
107 | panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC; |
108 | |
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; |
114 | |
115 | drm_mode_set_name(panel_fixed_mode); |
116 | } |
117 | |
118 | static bool |
119 | lvds_dvo_timing_equal_size(const struct lvds_dvo_timing *a, |
120 | const struct lvds_dvo_timing *b) |
121 | { |
122 | if (a->hactive_hi != b->hactive_hi || |
123 | a->hactive_lo != b->hactive_lo) |
124 | return false; |
125 | |
126 | if (a->hsync_off_hi != b->hsync_off_hi || |
127 | a->hsync_off_lo != b->hsync_off_lo) |
128 | return false; |
129 | |
130 | if (a->hsync_pulse_width != b->hsync_pulse_width) |
131 | return false; |
132 | |
133 | if (a->hblank_hi != b->hblank_hi || |
134 | a->hblank_lo != b->hblank_lo) |
135 | return false; |
136 | |
137 | if (a->vactive_hi != b->vactive_hi || |
138 | a->vactive_lo != b->vactive_lo) |
139 | return false; |
140 | |
141 | if (a->vsync_off != b->vsync_off) |
142 | return false; |
143 | |
144 | if (a->vsync_pulse_width != b->vsync_pulse_width) |
145 | return false; |
146 | |
147 | if (a->vblank_hi != b->vblank_hi || |
148 | a->vblank_lo != b->vblank_lo) |
149 | return false; |
150 | |
151 | return true; |
152 | } |
153 | |
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, |
157 | int index) |
158 | { |
159 | /* |
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 |
163 | */ |
164 | |
165 | int lfp_data_size = |
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 | #ifdef __NetBSD__ |
172 | const char *entry = (const char *)lvds_lfp_data->data + |
173 | lfp_data_size * index; |
174 | |
175 | return (const struct lvds_dvo_timing *)(entry + dvo_timing_offset); |
176 | #else |
177 | char *entry = (char *)lvds_lfp_data->data + lfp_data_size * index; |
178 | |
179 | return (struct lvds_dvo_timing *)(entry + dvo_timing_offset); |
180 | #endif |
181 | } |
182 | |
183 | /* get lvds_fp_timing entry |
184 | * this function may return NULL if the corresponding entry is invalid |
185 | */ |
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, |
190 | int index) |
191 | { |
192 | size_t data_ofs = (const u8 *)data - (const u8 *)bdb; |
193 | u16 data_size = ((const u16 *)data)[-1]; /* stored in header */ |
194 | size_t ofs; |
195 | |
196 | if (index >= ARRAY_SIZE(ptrs->ptr)) |
197 | return NULL; |
198 | ofs = ptrs->ptr[index].fp_timing_offset; |
199 | if (ofs < data_ofs || |
200 | ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size) |
201 | return NULL; |
202 | return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs); |
203 | } |
204 | |
205 | /* Try to find integrated panel data */ |
206 | static void |
207 | parse_lfp_panel_data(struct drm_i915_private *dev_priv, |
208 | struct bdb_header *bdb) |
209 | { |
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; |
217 | |
218 | lvds_options = find_section(bdb, BDB_LVDS_OPTIONS); |
219 | if (!lvds_options) |
220 | return; |
221 | |
222 | dev_priv->vbt.lvds_dither = lvds_options->pixel_dither; |
223 | if (lvds_options->panel_type == 0xff) |
224 | return; |
225 | |
226 | panel_type = lvds_options->panel_type; |
227 | |
228 | lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA); |
229 | if (!lvds_lfp_data) |
230 | return; |
231 | |
232 | lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS); |
233 | if (!lvds_lfp_data_ptrs) |
234 | return; |
235 | |
236 | dev_priv->vbt.lvds_vbt = 1; |
237 | |
238 | panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data, |
239 | lvds_lfp_data_ptrs, |
240 | lvds_options->panel_type); |
241 | |
242 | panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL); |
243 | if (!panel_fixed_mode) |
244 | return; |
245 | |
246 | fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing); |
247 | |
248 | dev_priv->vbt.lfp_lvds_vbt_mode = panel_fixed_mode; |
249 | |
250 | DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n" ); |
251 | drm_mode_debug_printmodeline(panel_fixed_mode); |
252 | |
253 | /* |
254 | * Iterate over the LVDS panel timing info to find the lowest clock |
255 | * for the native resolution. |
256 | */ |
257 | downclock = panel_dvo_timing->clock; |
258 | for (i = 0; i < 16; i++) { |
259 | const struct lvds_dvo_timing *dvo_timing; |
260 | |
261 | dvo_timing = get_lvds_dvo_timing(lvds_lfp_data, |
262 | lvds_lfp_data_ptrs, |
263 | i); |
264 | if (lvds_dvo_timing_equal_size(dvo_timing, panel_dvo_timing) && |
265 | dvo_timing->clock < downclock) |
266 | downclock = dvo_timing->clock; |
267 | } |
268 | |
269 | if (downclock < panel_dvo_timing->clock && i915.lvds_downclock) { |
270 | dev_priv->lvds_downclock_avail = 1; |
271 | dev_priv->lvds_downclock = downclock * 10; |
272 | DRM_DEBUG_KMS("LVDS downclock is found in VBT. " |
273 | "Normal Clock %dKHz, downclock %dKHz\n" , |
274 | panel_fixed_mode->clock, 10*downclock); |
275 | } |
276 | |
277 | fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data, |
278 | lvds_lfp_data_ptrs, |
279 | lvds_options->panel_type); |
280 | if (fp_timing) { |
281 | /* check the resolution, just to be sure */ |
282 | if (fp_timing->x_res == panel_fixed_mode->hdisplay && |
283 | fp_timing->y_res == panel_fixed_mode->vdisplay) { |
284 | dev_priv->vbt.bios_lvds_val = fp_timing->lvds_reg_val; |
285 | DRM_DEBUG_KMS("VBT initial LVDS value %x\n" , |
286 | dev_priv->vbt.bios_lvds_val); |
287 | } |
288 | } |
289 | } |
290 | |
291 | static void |
292 | parse_lfp_backlight(struct drm_i915_private *dev_priv, struct bdb_header *bdb) |
293 | { |
294 | const struct bdb_lfp_backlight_data *backlight_data; |
295 | const struct bdb_lfp_backlight_data_entry *entry; |
296 | |
297 | /* Err to enabling backlight if no backlight block. */ |
298 | dev_priv->vbt.backlight.present = true; |
299 | |
300 | backlight_data = find_section(bdb, BDB_LVDS_BACKLIGHT); |
301 | if (!backlight_data) |
302 | return; |
303 | |
304 | if (backlight_data->entry_size != sizeof(backlight_data->data[0])) { |
305 | DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n" , |
306 | backlight_data->entry_size); |
307 | return; |
308 | } |
309 | |
310 | entry = &backlight_data->data[panel_type]; |
311 | |
312 | dev_priv->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM; |
313 | if (!dev_priv->vbt.backlight.present) { |
314 | DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n" , |
315 | entry->type); |
316 | return; |
317 | } |
318 | |
319 | dev_priv->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz; |
320 | dev_priv->vbt.backlight.active_low_pwm = entry->active_low_pwm; |
321 | DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, " |
322 | "active %s, min brightness %u, level %u\n" , |
323 | dev_priv->vbt.backlight.pwm_freq_hz, |
324 | dev_priv->vbt.backlight.active_low_pwm ? "low" : "high" , |
325 | entry->min_brightness, |
326 | backlight_data->level[panel_type]); |
327 | } |
328 | |
329 | /* Try to find sdvo panel data */ |
330 | static void |
331 | parse_sdvo_panel_data(struct drm_i915_private *dev_priv, |
332 | struct bdb_header *bdb) |
333 | { |
334 | struct lvds_dvo_timing *dvo_timing; |
335 | struct drm_display_mode *panel_fixed_mode; |
336 | int index; |
337 | |
338 | index = i915.vbt_sdvo_panel_type; |
339 | if (index == -2) { |
340 | DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n" ); |
341 | return; |
342 | } |
343 | |
344 | if (index == -1) { |
345 | struct bdb_sdvo_lvds_options *sdvo_lvds_options; |
346 | |
347 | sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS); |
348 | if (!sdvo_lvds_options) |
349 | return; |
350 | |
351 | index = sdvo_lvds_options->panel_type; |
352 | } |
353 | |
354 | dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS); |
355 | if (!dvo_timing) |
356 | return; |
357 | |
358 | panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL); |
359 | if (!panel_fixed_mode) |
360 | return; |
361 | |
362 | fill_detail_timing_data(panel_fixed_mode, dvo_timing + index); |
363 | |
364 | dev_priv->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode; |
365 | |
366 | DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n" ); |
367 | drm_mode_debug_printmodeline(panel_fixed_mode); |
368 | } |
369 | |
370 | static int intel_bios_ssc_frequency(struct drm_device *dev, |
371 | bool alternate) |
372 | { |
373 | switch (INTEL_INFO(dev)->gen) { |
374 | case 2: |
375 | return alternate ? 66667 : 48000; |
376 | case 3: |
377 | case 4: |
378 | return alternate ? 100000 : 96000; |
379 | default: |
380 | return alternate ? 100000 : 120000; |
381 | } |
382 | } |
383 | |
384 | static void |
385 | parse_general_features(struct drm_i915_private *dev_priv, |
386 | struct bdb_header *bdb) |
387 | { |
388 | struct drm_device *dev = dev_priv->dev; |
389 | struct bdb_general_features *general; |
390 | |
391 | general = find_section(bdb, BDB_GENERAL_FEATURES); |
392 | if (general) { |
393 | dev_priv->vbt.int_tv_support = general->int_tv_support; |
394 | dev_priv->vbt.int_crt_support = general->int_crt_support; |
395 | dev_priv->vbt.lvds_use_ssc = general->enable_ssc; |
396 | dev_priv->vbt.lvds_ssc_freq = |
397 | intel_bios_ssc_frequency(dev, general->ssc_freq); |
398 | dev_priv->vbt.display_clock_mode = general->display_clock_mode; |
399 | dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted; |
400 | 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" , |
401 | dev_priv->vbt.int_tv_support, |
402 | dev_priv->vbt.int_crt_support, |
403 | dev_priv->vbt.lvds_use_ssc, |
404 | dev_priv->vbt.lvds_ssc_freq, |
405 | dev_priv->vbt.display_clock_mode, |
406 | dev_priv->vbt.fdi_rx_polarity_inverted); |
407 | } |
408 | } |
409 | |
410 | static void |
411 | parse_general_definitions(struct drm_i915_private *dev_priv, |
412 | struct bdb_header *bdb) |
413 | { |
414 | struct bdb_general_definitions *general; |
415 | |
416 | general = find_section(bdb, BDB_GENERAL_DEFINITIONS); |
417 | if (general) { |
418 | u16 block_size = get_blocksize(general); |
419 | if (block_size >= sizeof(*general)) { |
420 | int bus_pin = general->crt_ddc_gmbus_pin; |
421 | DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n" , bus_pin); |
422 | if (intel_gmbus_is_port_valid(bus_pin)) |
423 | dev_priv->vbt.crt_ddc_pin = bus_pin; |
424 | } else { |
425 | DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n" , |
426 | block_size); |
427 | } |
428 | } |
429 | } |
430 | |
431 | static void |
432 | parse_sdvo_device_mapping(struct drm_i915_private *dev_priv, |
433 | struct bdb_header *bdb) |
434 | { |
435 | struct sdvo_device_mapping *p_mapping; |
436 | struct bdb_general_definitions *p_defs; |
437 | union child_device_config *p_child; |
438 | int i, child_device_num, count; |
439 | u16 block_size; |
440 | |
441 | p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS); |
442 | if (!p_defs) { |
443 | DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n" ); |
444 | return; |
445 | } |
446 | /* judge whether the size of child device meets the requirements. |
447 | * If the child device size obtained from general definition block |
448 | * is different with sizeof(struct child_device_config), skip the |
449 | * parsing of sdvo device info |
450 | */ |
451 | if (p_defs->child_dev_size != sizeof(*p_child)) { |
452 | /* different child dev size . Ignore it */ |
453 | DRM_DEBUG_KMS("different child size is found. Invalid.\n" ); |
454 | return; |
455 | } |
456 | /* get the block size of general definitions */ |
457 | block_size = get_blocksize(p_defs); |
458 | /* get the number of child device */ |
459 | child_device_num = (block_size - sizeof(*p_defs)) / |
460 | sizeof(*p_child); |
461 | count = 0; |
462 | for (i = 0; i < child_device_num; i++) { |
463 | p_child = &(p_defs->devices[i]); |
464 | if (!p_child->old.device_type) { |
465 | /* skip the device block if device type is invalid */ |
466 | continue; |
467 | } |
468 | if (p_child->old.slave_addr != SLAVE_ADDR1 && |
469 | p_child->old.slave_addr != SLAVE_ADDR2) { |
470 | /* |
471 | * If the slave address is neither 0x70 nor 0x72, |
472 | * it is not a SDVO device. Skip it. |
473 | */ |
474 | continue; |
475 | } |
476 | if (p_child->old.dvo_port != DEVICE_PORT_DVOB && |
477 | p_child->old.dvo_port != DEVICE_PORT_DVOC) { |
478 | /* skip the incorrect SDVO port */ |
479 | DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n" ); |
480 | continue; |
481 | } |
482 | DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on" |
483 | " %s port\n" , |
484 | p_child->old.slave_addr, |
485 | (p_child->old.dvo_port == DEVICE_PORT_DVOB) ? |
486 | "SDVOB" : "SDVOC" ); |
487 | p_mapping = &(dev_priv->sdvo_mappings[p_child->old.dvo_port - 1]); |
488 | if (!p_mapping->initialized) { |
489 | p_mapping->dvo_port = p_child->old.dvo_port; |
490 | p_mapping->slave_addr = p_child->old.slave_addr; |
491 | p_mapping->dvo_wiring = p_child->old.dvo_wiring; |
492 | p_mapping->ddc_pin = p_child->old.ddc_pin; |
493 | p_mapping->i2c_pin = p_child->old.i2c_pin; |
494 | p_mapping->initialized = 1; |
495 | DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n" , |
496 | p_mapping->dvo_port, |
497 | p_mapping->slave_addr, |
498 | p_mapping->dvo_wiring, |
499 | p_mapping->ddc_pin, |
500 | p_mapping->i2c_pin); |
501 | } else { |
502 | DRM_DEBUG_KMS("Maybe one SDVO port is shared by " |
503 | "two SDVO device.\n" ); |
504 | } |
505 | if (p_child->old.slave2_addr) { |
506 | /* Maybe this is a SDVO device with multiple inputs */ |
507 | /* And the mapping info is not added */ |
508 | DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this" |
509 | " is a SDVO device with multiple inputs.\n" ); |
510 | } |
511 | count++; |
512 | } |
513 | |
514 | if (!count) { |
515 | /* No SDVO device info is found */ |
516 | DRM_DEBUG_KMS("No SDVO device info is found in VBT\n" ); |
517 | } |
518 | return; |
519 | } |
520 | |
521 | static void |
522 | parse_driver_features(struct drm_i915_private *dev_priv, |
523 | struct bdb_header *bdb) |
524 | { |
525 | struct bdb_driver_features *driver; |
526 | |
527 | driver = find_section(bdb, BDB_DRIVER_FEATURES); |
528 | if (!driver) |
529 | return; |
530 | |
531 | if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP) |
532 | dev_priv->vbt.edp_support = 1; |
533 | |
534 | if (driver->dual_frequency) |
535 | dev_priv->render_reclock_avail = true; |
536 | } |
537 | |
538 | static void |
539 | parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb) |
540 | { |
541 | struct bdb_edp *edp; |
542 | struct edp_power_seq *edp_pps; |
543 | struct edp_link_params *edp_link_params; |
544 | |
545 | edp = find_section(bdb, BDB_EDP); |
546 | if (!edp) { |
547 | if (dev_priv->vbt.edp_support) |
548 | DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n" ); |
549 | return; |
550 | } |
551 | |
552 | switch ((edp->color_depth >> (panel_type * 2)) & 3) { |
553 | case EDP_18BPP: |
554 | dev_priv->vbt.edp_bpp = 18; |
555 | break; |
556 | case EDP_24BPP: |
557 | dev_priv->vbt.edp_bpp = 24; |
558 | break; |
559 | case EDP_30BPP: |
560 | dev_priv->vbt.edp_bpp = 30; |
561 | break; |
562 | } |
563 | |
564 | /* Get the eDP sequencing and link info */ |
565 | edp_pps = &edp->power_seqs[panel_type]; |
566 | edp_link_params = &edp->link_params[panel_type]; |
567 | |
568 | dev_priv->vbt.edp_pps = *edp_pps; |
569 | |
570 | switch (edp_link_params->rate) { |
571 | case EDP_RATE_1_62: |
572 | dev_priv->vbt.edp_rate = DP_LINK_BW_1_62; |
573 | break; |
574 | case EDP_RATE_2_7: |
575 | dev_priv->vbt.edp_rate = DP_LINK_BW_2_7; |
576 | break; |
577 | default: |
578 | DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n" , |
579 | edp_link_params->rate); |
580 | break; |
581 | } |
582 | |
583 | switch (edp_link_params->lanes) { |
584 | case EDP_LANE_1: |
585 | dev_priv->vbt.edp_lanes = 1; |
586 | break; |
587 | case EDP_LANE_2: |
588 | dev_priv->vbt.edp_lanes = 2; |
589 | break; |
590 | case EDP_LANE_4: |
591 | dev_priv->vbt.edp_lanes = 4; |
592 | break; |
593 | default: |
594 | DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n" , |
595 | edp_link_params->lanes); |
596 | break; |
597 | } |
598 | |
599 | switch (edp_link_params->preemphasis) { |
600 | case EDP_PREEMPHASIS_NONE: |
601 | dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_0; |
602 | break; |
603 | case EDP_PREEMPHASIS_3_5dB: |
604 | dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_3_5; |
605 | break; |
606 | case EDP_PREEMPHASIS_6dB: |
607 | dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_6; |
608 | break; |
609 | case EDP_PREEMPHASIS_9_5dB: |
610 | dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_9_5; |
611 | break; |
612 | default: |
613 | DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n" , |
614 | edp_link_params->preemphasis); |
615 | break; |
616 | } |
617 | |
618 | switch (edp_link_params->vswing) { |
619 | case EDP_VSWING_0_4V: |
620 | dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_400; |
621 | break; |
622 | case EDP_VSWING_0_6V: |
623 | dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_600; |
624 | break; |
625 | case EDP_VSWING_0_8V: |
626 | dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_800; |
627 | break; |
628 | case EDP_VSWING_1_2V: |
629 | dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_1200; |
630 | break; |
631 | default: |
632 | DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n" , |
633 | edp_link_params->vswing); |
634 | break; |
635 | } |
636 | } |
637 | |
638 | static void |
639 | parse_mipi(struct drm_i915_private *dev_priv, struct bdb_header *bdb) |
640 | { |
641 | struct bdb_mipi *mipi; |
642 | |
643 | mipi = find_section(bdb, BDB_MIPI_CONFIG); |
644 | if (!mipi) { |
645 | DRM_DEBUG_KMS("No MIPI BDB found" ); |
646 | return; |
647 | } |
648 | |
649 | /* XXX: add more info */ |
650 | dev_priv->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID; |
651 | } |
652 | |
653 | static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port, |
654 | struct bdb_header *bdb) |
655 | { |
656 | union child_device_config *it, *child = NULL; |
657 | struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port]; |
658 | uint8_t hdmi_level_shift; |
659 | int i, j; |
660 | bool is_dvi, is_hdmi, is_dp, is_edp, is_crt; |
661 | uint8_t aux_channel; |
662 | /* Each DDI port can have more than one value on the "DVO Port" field, |
663 | * so look for all the possible values for each port and abort if more |
664 | * than one is found. */ |
665 | int dvo_ports[][2] = { |
666 | {DVO_PORT_HDMIA, DVO_PORT_DPA}, |
667 | {DVO_PORT_HDMIB, DVO_PORT_DPB}, |
668 | {DVO_PORT_HDMIC, DVO_PORT_DPC}, |
669 | {DVO_PORT_HDMID, DVO_PORT_DPD}, |
670 | {DVO_PORT_CRT, -1 /* Port E can only be DVO_PORT_CRT */ }, |
671 | }; |
672 | |
673 | /* Find the child device to use, abort if more than one found. */ |
674 | for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { |
675 | it = dev_priv->vbt.child_dev + i; |
676 | |
677 | for (j = 0; j < 2; j++) { |
678 | if (dvo_ports[port][j] == -1) |
679 | break; |
680 | |
681 | if (it->common.dvo_port == dvo_ports[port][j]) { |
682 | if (child) { |
683 | DRM_DEBUG_KMS("More than one child device for port %c in VBT.\n" , |
684 | port_name(port)); |
685 | return; |
686 | } |
687 | child = it; |
688 | } |
689 | } |
690 | } |
691 | if (!child) |
692 | return; |
693 | |
694 | aux_channel = child->raw[25]; |
695 | |
696 | is_dvi = child->common.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING; |
697 | is_dp = child->common.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT; |
698 | is_crt = child->common.device_type & DEVICE_TYPE_ANALOG_OUTPUT; |
699 | is_hdmi = is_dvi && (child->common.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0; |
700 | is_edp = is_dp && (child->common.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR); |
701 | |
702 | info->supports_dvi = is_dvi; |
703 | info->supports_hdmi = is_hdmi; |
704 | info->supports_dp = is_dp; |
705 | |
706 | DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n" , |
707 | port_name(port), is_dp, is_hdmi, is_dvi, is_edp, is_crt); |
708 | |
709 | if (is_edp && is_dvi) |
710 | DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n" , |
711 | port_name(port)); |
712 | if (is_crt && port != PORT_E) |
713 | DRM_DEBUG_KMS("Port %c is analog\n" , port_name(port)); |
714 | if (is_crt && (is_dvi || is_dp)) |
715 | DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n" , |
716 | port_name(port)); |
717 | if (is_dvi && (port == PORT_A || port == PORT_E)) |
718 | DRM_DEBUG_KMS("Port %c is TMDS compabile\n" , port_name(port)); |
719 | if (!is_dvi && !is_dp && !is_crt) |
720 | DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n" , |
721 | port_name(port)); |
722 | if (is_edp && (port == PORT_B || port == PORT_C || port == PORT_E)) |
723 | DRM_DEBUG_KMS("Port %c is internal DP\n" , port_name(port)); |
724 | |
725 | if (is_dvi) { |
726 | if (child->common.ddc_pin == 0x05 && port != PORT_B) |
727 | DRM_DEBUG_KMS("Unexpected DDC pin for port B\n" ); |
728 | if (child->common.ddc_pin == 0x04 && port != PORT_C) |
729 | DRM_DEBUG_KMS("Unexpected DDC pin for port C\n" ); |
730 | if (child->common.ddc_pin == 0x06 && port != PORT_D) |
731 | DRM_DEBUG_KMS("Unexpected DDC pin for port D\n" ); |
732 | } |
733 | |
734 | if (is_dp) { |
735 | if (aux_channel == 0x40 && port != PORT_A) |
736 | DRM_DEBUG_KMS("Unexpected AUX channel for port A\n" ); |
737 | if (aux_channel == 0x10 && port != PORT_B) |
738 | DRM_DEBUG_KMS("Unexpected AUX channel for port B\n" ); |
739 | if (aux_channel == 0x20 && port != PORT_C) |
740 | DRM_DEBUG_KMS("Unexpected AUX channel for port C\n" ); |
741 | if (aux_channel == 0x30 && port != PORT_D) |
742 | DRM_DEBUG_KMS("Unexpected AUX channel for port D\n" ); |
743 | } |
744 | |
745 | if (bdb->version >= 158) { |
746 | /* The VBT HDMI level shift values match the table we have. */ |
747 | hdmi_level_shift = child->raw[7] & 0xF; |
748 | if (hdmi_level_shift < 0xC) { |
749 | DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n" , |
750 | port_name(port), |
751 | hdmi_level_shift); |
752 | info->hdmi_level_shift = hdmi_level_shift; |
753 | } |
754 | } |
755 | } |
756 | |
757 | static void parse_ddi_ports(struct drm_i915_private *dev_priv, |
758 | struct bdb_header *bdb) |
759 | { |
760 | struct drm_device *dev = dev_priv->dev; |
761 | enum port port; |
762 | |
763 | if (!HAS_DDI(dev)) |
764 | return; |
765 | |
766 | if (!dev_priv->vbt.child_dev_num) |
767 | return; |
768 | |
769 | if (bdb->version < 155) |
770 | return; |
771 | |
772 | for (port = PORT_A; port < I915_MAX_PORTS; port++) |
773 | parse_ddi_port(dev_priv, port, bdb); |
774 | } |
775 | |
776 | static void |
777 | parse_device_mapping(struct drm_i915_private *dev_priv, |
778 | struct bdb_header *bdb) |
779 | { |
780 | struct bdb_general_definitions *p_defs; |
781 | union child_device_config *p_child, *child_dev_ptr; |
782 | int i, child_device_num, count; |
783 | u16 block_size; |
784 | |
785 | p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS); |
786 | if (!p_defs) { |
787 | DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n" ); |
788 | return; |
789 | } |
790 | /* judge whether the size of child device meets the requirements. |
791 | * If the child device size obtained from general definition block |
792 | * is different with sizeof(struct child_device_config), skip the |
793 | * parsing of sdvo device info |
794 | */ |
795 | if (p_defs->child_dev_size != sizeof(*p_child)) { |
796 | /* different child dev size . Ignore it */ |
797 | DRM_DEBUG_KMS("different child size is found. Invalid.\n" ); |
798 | return; |
799 | } |
800 | /* get the block size of general definitions */ |
801 | block_size = get_blocksize(p_defs); |
802 | /* get the number of child device */ |
803 | child_device_num = (block_size - sizeof(*p_defs)) / |
804 | sizeof(*p_child); |
805 | count = 0; |
806 | /* get the number of child device that is present */ |
807 | for (i = 0; i < child_device_num; i++) { |
808 | p_child = &(p_defs->devices[i]); |
809 | if (!p_child->common.device_type) { |
810 | /* skip the device block if device type is invalid */ |
811 | continue; |
812 | } |
813 | count++; |
814 | } |
815 | if (!count) { |
816 | DRM_DEBUG_KMS("no child dev is parsed from VBT\n" ); |
817 | return; |
818 | } |
819 | dev_priv->vbt.child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL); |
820 | if (!dev_priv->vbt.child_dev) { |
821 | DRM_DEBUG_KMS("No memory space for child device\n" ); |
822 | return; |
823 | } |
824 | |
825 | dev_priv->vbt.child_dev_num = count; |
826 | count = 0; |
827 | for (i = 0; i < child_device_num; i++) { |
828 | p_child = &(p_defs->devices[i]); |
829 | if (!p_child->common.device_type) { |
830 | /* skip the device block if device type is invalid */ |
831 | continue; |
832 | } |
833 | child_dev_ptr = dev_priv->vbt.child_dev + count; |
834 | count++; |
835 | memcpy((void *)child_dev_ptr, (void *)p_child, |
836 | sizeof(*p_child)); |
837 | } |
838 | return; |
839 | } |
840 | |
841 | static void |
842 | init_vbt_defaults(struct drm_i915_private *dev_priv) |
843 | { |
844 | struct drm_device *dev = dev_priv->dev; |
845 | enum port port; |
846 | |
847 | dev_priv->vbt.crt_ddc_pin = GMBUS_PORT_VGADDC; |
848 | |
849 | /* LFP panel data */ |
850 | dev_priv->vbt.lvds_dither = 1; |
851 | dev_priv->vbt.lvds_vbt = 0; |
852 | |
853 | /* SDVO panel data */ |
854 | dev_priv->vbt.sdvo_lvds_vbt_mode = NULL; |
855 | |
856 | /* general features */ |
857 | dev_priv->vbt.int_tv_support = 1; |
858 | dev_priv->vbt.int_crt_support = 1; |
859 | |
860 | /* Default to using SSC */ |
861 | dev_priv->vbt.lvds_use_ssc = 1; |
862 | /* |
863 | * Core/SandyBridge/IvyBridge use alternative (120MHz) reference |
864 | * clock for LVDS. |
865 | */ |
866 | dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev, |
867 | !HAS_PCH_SPLIT(dev)); |
868 | DRM_DEBUG_KMS("Set default to SSC at %d kHz\n" , dev_priv->vbt.lvds_ssc_freq); |
869 | |
870 | for (port = PORT_A; port < I915_MAX_PORTS; port++) { |
871 | struct ddi_vbt_port_info *info = |
872 | &dev_priv->vbt.ddi_port_info[port]; |
873 | |
874 | /* Recommended BSpec default: 800mV 0dB. */ |
875 | info->hdmi_level_shift = 6; |
876 | |
877 | info->supports_dvi = (port != PORT_A && port != PORT_E); |
878 | info->supports_hdmi = info->supports_dvi; |
879 | info->supports_dp = (port != PORT_E); |
880 | } |
881 | } |
882 | |
883 | static int __init intel_no_opregion_vbt_callback(const struct dmi_system_id *id) |
884 | { |
885 | DRM_DEBUG_KMS("Falling back to manually reading VBT from " |
886 | "VBIOS ROM for %s\n" , |
887 | id->ident); |
888 | return 1; |
889 | } |
890 | |
891 | static const struct dmi_system_id intel_no_opregion_vbt[] = { |
892 | { |
893 | .callback = intel_no_opregion_vbt_callback, |
894 | .ident = "ThinkCentre A57" , |
895 | .matches = { |
896 | DMI_MATCH(DMI_SYS_VENDOR, "LENOVO" ), |
897 | DMI_MATCH(DMI_PRODUCT_NAME, "97027RG" ), |
898 | }, |
899 | }, |
900 | { .callback = NULL, } |
901 | }; |
902 | |
903 | /** |
904 | * intel_parse_bios - find VBT and initialize settings from the BIOS |
905 | * @dev: DRM device |
906 | * |
907 | * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers |
908 | * to appropriate values. |
909 | * |
910 | * Returns 0 on success, nonzero on failure. |
911 | */ |
912 | #ifdef __NetBSD__ |
913 | # define __iomem __pci_rom_iomem |
914 | #endif |
915 | int |
916 | intel_parse_bios(struct drm_device *dev) |
917 | { |
918 | struct drm_i915_private *dev_priv = dev->dev_private; |
919 | struct pci_dev *pdev = dev->pdev; |
920 | struct bdb_header *bdb = NULL; |
921 | u8 __iomem *bios = NULL; |
922 | |
923 | if (HAS_PCH_NOP(dev)) |
924 | return -ENODEV; |
925 | |
926 | init_vbt_defaults(dev_priv); |
927 | |
928 | /* XXX Should this validation be moved to intel_opregion.c? */ |
929 | if (!dmi_check_system(intel_no_opregion_vbt) && dev_priv->opregion.vbt) { |
930 | struct vbt_header *vbt = dev_priv->opregion.vbt; |
931 | if (memcmp(vbt->signature, "$VBT" , 4) == 0) { |
932 | DRM_DEBUG_KMS("Using VBT from OpRegion: %20s\n" , |
933 | vbt->signature); |
934 | bdb = (struct bdb_header *)((char *)vbt + vbt->bdb_offset); |
935 | } else |
936 | dev_priv->opregion.vbt = NULL; |
937 | } |
938 | |
939 | if (bdb == NULL) { |
940 | struct vbt_header *vbt = NULL; |
941 | size_t size; |
942 | int i; |
943 | |
944 | bios = pci_map_rom(pdev, &size); |
945 | if (!bios) |
946 | return -1; |
947 | |
948 | /* Scour memory looking for the VBT signature */ |
949 | for (i = 0; i + 4 < size; i++) { |
950 | if (!memcmp(bios + i, "$VBT" , 4)) { |
951 | vbt = (struct vbt_header *)(bios + i); |
952 | break; |
953 | } |
954 | } |
955 | |
956 | if (!vbt) { |
957 | DRM_DEBUG_DRIVER("VBT signature missing\n" ); |
958 | pci_unmap_rom(pdev, bios); |
959 | return -1; |
960 | } |
961 | |
962 | bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset); |
963 | } |
964 | |
965 | /* Grab useful general definitions */ |
966 | parse_general_features(dev_priv, bdb); |
967 | parse_general_definitions(dev_priv, bdb); |
968 | parse_lfp_panel_data(dev_priv, bdb); |
969 | parse_lfp_backlight(dev_priv, bdb); |
970 | parse_sdvo_panel_data(dev_priv, bdb); |
971 | parse_sdvo_device_mapping(dev_priv, bdb); |
972 | parse_device_mapping(dev_priv, bdb); |
973 | parse_driver_features(dev_priv, bdb); |
974 | parse_edp(dev_priv, bdb); |
975 | parse_mipi(dev_priv, bdb); |
976 | parse_ddi_ports(dev_priv, bdb); |
977 | |
978 | if (bios) |
979 | pci_unmap_rom(pdev, bios); |
980 | |
981 | return 0; |
982 | } |
983 | #ifdef __NetBSD__ |
984 | # undef __iomem |
985 | #endif |
986 | |
987 | /* Ensure that vital registers have been initialised, even if the BIOS |
988 | * is absent or just failing to do its job. |
989 | */ |
990 | void intel_setup_bios(struct drm_device *dev) |
991 | { |
992 | struct drm_i915_private *dev_priv = dev->dev_private; |
993 | |
994 | /* Set the Panel Power On/Off timings if uninitialized. */ |
995 | if (!HAS_PCH_SPLIT(dev) && |
996 | I915_READ(PP_ON_DELAYS) == 0 && I915_READ(PP_OFF_DELAYS) == 0) { |
997 | /* Set T2 to 40ms and T5 to 200ms */ |
998 | I915_WRITE(PP_ON_DELAYS, 0x019007d0); |
999 | |
1000 | /* Set T3 to 35ms and Tx to 200ms */ |
1001 | I915_WRITE(PP_OFF_DELAYS, 0x015e07d0); |
1002 | } |
1003 | } |
1004 | |