2 * Copyright (c) 2006 Luc Verhaegen (quirks list)
3 * Copyright (c) 2007-2008 Intel Corporation
4 * Jesse Barnes <jesse.barnes@intel.com>
5 * Copyright 2010 Red Hat, Inc.
7 * DDC probing routines (drm_ddc_read & drm_do_probe_ddc_edid) originally from
9 * Copyright (C) 2006 Dennis Munsie <dmunsie@cecropia.com>
11 * Permission is hereby granted, free of charge, to any person obtaining a
12 * copy of this software and associated documentation files (the "Software"),
13 * to deal in the Software without restriction, including without limitation
14 * the rights to use, copy, modify, merge, publish, distribute, sub license,
15 * and/or sell copies of the Software, and to permit persons to whom the
16 * Software is furnished to do so, subject to the following conditions:
18 * The above copyright notice and this permission notice (including the
19 * next paragraph) shall be included in all copies or substantial portions
22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
25 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
26 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
27 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
28 * DEALINGS IN THE SOFTWARE.
30 #include <linux/kernel.h>
31 #include <linux/slab.h>
32 #include <linux/i2c.h>
33 #include <linux/module.h>
36 #include "drm_edid_modes.h"
38 #define version_greater(edid, maj, min) \
39 (((edid)->version > (maj)) || \
40 ((edid)->version == (maj) && (edid)->revision > (min)))
42 #define EDID_EST_TIMINGS 16
43 #define EDID_STD_TIMINGS 8
44 #define EDID_DETAILED_TIMINGS 4
47 * EDID blocks out in the wild have a variety of bugs, try to collect
48 * them here (note that userspace may work around broken monitors first,
49 * but fixes should make their way here so that the kernel "just works"
50 * on as many displays as possible).
53 /* First detailed mode wrong, use largest 60Hz mode */
54 #define EDID_QUIRK_PREFER_LARGE_60 (1 << 0)
55 /* Reported 135MHz pixel clock is too high, needs adjustment */
56 #define EDID_QUIRK_135_CLOCK_TOO_HIGH (1 << 1)
57 /* Prefer the largest mode at 75 Hz */
58 #define EDID_QUIRK_PREFER_LARGE_75 (1 << 2)
59 /* Detail timing is in cm not mm */
60 #define EDID_QUIRK_DETAILED_IN_CM (1 << 3)
61 /* Detailed timing descriptors have bogus size values, so just take the
62 * maximum size and use that.
64 #define EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE (1 << 4)
65 /* Monitor forgot to set the first detailed is preferred bit. */
66 #define EDID_QUIRK_FIRST_DETAILED_PREFERRED (1 << 5)
67 /* use +hsync +vsync for detailed mode */
68 #define EDID_QUIRK_DETAILED_SYNC_PP (1 << 6)
69 /* Force reduced-blanking timings for detailed modes */
70 #define EDID_QUIRK_FORCE_REDUCED_BLANKING (1 << 7)
72 struct detailed_mode_closure {
73 struct drm_connector *connector;
85 static struct edid_quirk {
89 } edid_quirk_list[] = {
91 { "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 },
93 { "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60 },
95 { "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
97 /* Belinea 10 15 55 */
98 { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
99 { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
101 /* Envision Peripherals, Inc. EN-7100e */
102 { "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH },
103 /* Envision EN2028 */
104 { "EPI", 8232, EDID_QUIRK_PREFER_LARGE_60 },
106 /* Funai Electronics PM36B */
107 { "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 |
108 EDID_QUIRK_DETAILED_IN_CM },
110 /* LG Philips LCD LP154W01-A5 */
111 { "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
112 { "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
114 /* Philips 107p5 CRT */
115 { "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
118 { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
120 /* Samsung SyncMaster 205BW. Note: irony */
121 { "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP },
122 /* Samsung SyncMaster 22[5-6]BW */
123 { "SAM", 596, EDID_QUIRK_PREFER_LARGE_60 },
124 { "SAM", 638, EDID_QUIRK_PREFER_LARGE_60 },
126 /* ViewSonic VA2026w */
127 { "VSC", 5020, EDID_QUIRK_FORCE_REDUCED_BLANKING },
130 /*** DDC fetch and block validation ***/
132 static const u8 edid_header[] = {
133 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
137 * Sanity check the header of the base EDID block. Return 8 if the header
138 * is perfect, down to 0 if it's totally wrong.
140 int drm_edid_header_is_valid(const u8 *raw_edid)
144 for (i = 0; i < sizeof(edid_header); i++)
145 if (raw_edid[i] == edid_header[i])
150 EXPORT_SYMBOL(drm_edid_header_is_valid);
152 static int edid_fixup __read_mostly = 6;
153 module_param_named(edid_fixup, edid_fixup, int, 0400);
154 MODULE_PARM_DESC(edid_fixup,
155 "Minimum number of valid EDID header bytes (0-8, default 6)");
158 * Sanity check the EDID block (base or extension). Return 0 if the block
159 * doesn't check out, or 1 if it's valid.
161 bool drm_edid_block_valid(u8 *raw_edid, int block)
165 struct edid *edid = (struct edid *)raw_edid;
167 if (edid_fixup > 8 || edid_fixup < 0)
171 int score = drm_edid_header_is_valid(raw_edid);
173 else if (score >= edid_fixup) {
174 DRM_DEBUG("Fixing EDID header, your hardware may be failing\n");
175 memcpy(raw_edid, edid_header, sizeof(edid_header));
181 for (i = 0; i < EDID_LENGTH; i++)
184 DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum);
186 /* allow CEA to slide through, switches mangle this */
187 if (raw_edid[0] != 0x02)
191 /* per-block-type checks */
192 switch (raw_edid[0]) {
194 if (edid->version != 1) {
195 DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
199 if (edid->revision > 4)
200 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
211 printk(KERN_ERR "Raw EDID:\n");
212 print_hex_dump(KERN_ERR, " \t", DUMP_PREFIX_NONE, 16, 1,
213 raw_edid, EDID_LENGTH, false);
217 EXPORT_SYMBOL(drm_edid_block_valid);
220 * drm_edid_is_valid - sanity check EDID data
223 * Sanity-check an entire EDID record (including extensions)
225 bool drm_edid_is_valid(struct edid *edid)
228 u8 *raw = (u8 *)edid;
233 for (i = 0; i <= edid->extensions; i++)
234 if (!drm_edid_block_valid(raw + i * EDID_LENGTH, i))
239 EXPORT_SYMBOL(drm_edid_is_valid);
241 #define DDC_SEGMENT_ADDR 0x30
243 * Get EDID information via I2C.
245 * \param adapter : i2c device adaptor
246 * \param buf : EDID data buffer to be filled
247 * \param len : EDID data buffer length
248 * \return 0 on success or -1 on failure.
250 * Try to fetch EDID information by calling i2c driver function.
253 drm_do_probe_ddc_edid(struct i2c_adapter *adapter, unsigned char *buf,
256 unsigned char start = block * EDID_LENGTH;
257 int ret, retries = 5;
259 /* The core i2c driver will automatically retry the transfer if the
260 * adapter reports EAGAIN. However, we find that bit-banging transfers
261 * are susceptible to errors under a heavily loaded machine and
262 * generate spurious NAKs and timeouts. Retrying the transfer
263 * of the individual block a few times seems to overcome this.
266 struct i2c_msg msgs[] = {
279 ret = i2c_transfer(adapter, msgs, 2);
281 DRM_DEBUG_KMS("drm: skipping non-existent adapter %s\n",
285 } while (ret != 2 && --retries);
287 return ret == 2 ? 0 : -1;
290 static bool drm_edid_is_zero(u8 *in_edid, int length)
293 u32 *raw_edid = (u32 *)in_edid;
295 for (i = 0; i < length / 4; i++)
296 if (*(raw_edid + i) != 0)
302 drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter)
304 int i, j = 0, valid_extensions = 0;
307 if ((block = kmalloc(EDID_LENGTH, GFP_KERNEL)) == NULL)
310 /* base block fetch */
311 for (i = 0; i < 4; i++) {
312 if (drm_do_probe_ddc_edid(adapter, block, 0, EDID_LENGTH))
314 if (drm_edid_block_valid(block, 0))
316 if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) {
317 connector->null_edid_counter++;
324 /* if there's no extensions, we're done */
325 if (block[0x7e] == 0)
328 new = krealloc(block, (block[0x7e] + 1) * EDID_LENGTH, GFP_KERNEL);
333 for (j = 1; j <= block[0x7e]; j++) {
334 for (i = 0; i < 4; i++) {
335 if (drm_do_probe_ddc_edid(adapter,
336 block + (valid_extensions + 1) * EDID_LENGTH,
339 if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH, j)) {
345 dev_warn(connector->dev->dev,
346 "%s: Ignoring invalid EDID block %d.\n",
347 drm_get_connector_name(connector), j);
350 if (valid_extensions != block[0x7e]) {
351 block[EDID_LENGTH-1] += block[0x7e] - valid_extensions;
352 block[0x7e] = valid_extensions;
353 new = krealloc(block, (valid_extensions + 1) * EDID_LENGTH, GFP_KERNEL);
362 dev_warn(connector->dev->dev, "%s: EDID block %d invalid.\n",
363 drm_get_connector_name(connector), j);
371 * Probe DDC presence.
373 * \param adapter : i2c device adaptor
374 * \return 1 on success
377 drm_probe_ddc(struct i2c_adapter *adapter)
381 return (drm_do_probe_ddc_edid(adapter, &out, 0, 1) == 0);
385 * drm_get_edid - get EDID data, if available
386 * @connector: connector we're probing
387 * @adapter: i2c adapter to use for DDC
389 * Poke the given i2c channel to grab EDID data if possible. If found,
390 * attach it to the connector.
392 * Return edid data or NULL if we couldn't find any.
394 struct edid *drm_get_edid(struct drm_connector *connector,
395 struct i2c_adapter *adapter)
397 struct edid *edid = NULL;
399 if (drm_probe_ddc(adapter))
400 edid = (struct edid *)drm_do_get_edid(connector, adapter);
402 connector->display_info.raw_edid = (char *)edid;
407 EXPORT_SYMBOL(drm_get_edid);
409 /*** EDID parsing ***/
412 * edid_vendor - match a string against EDID's obfuscated vendor field
413 * @edid: EDID to match
414 * @vendor: vendor string
416 * Returns true if @vendor is in @edid, false otherwise
418 static bool edid_vendor(struct edid *edid, char *vendor)
422 edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@';
423 edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) |
424 ((edid->mfg_id[1] & 0xe0) >> 5)) + '@';
425 edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@';
427 return !strncmp(edid_vendor, vendor, 3);
431 * edid_get_quirks - return quirk flags for a given EDID
432 * @edid: EDID to process
434 * This tells subsequent routines what fixes they need to apply.
436 static u32 edid_get_quirks(struct edid *edid)
438 struct edid_quirk *quirk;
441 for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) {
442 quirk = &edid_quirk_list[i];
444 if (edid_vendor(edid, quirk->vendor) &&
445 (EDID_PRODUCT_ID(edid) == quirk->product_id))
446 return quirk->quirks;
452 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
453 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
456 * edid_fixup_preferred - set preferred modes based on quirk list
457 * @connector: has mode list to fix up
458 * @quirks: quirks list
460 * Walk the mode list for @connector, clearing the preferred status
461 * on existing modes and setting it anew for the right mode ala @quirks.
463 static void edid_fixup_preferred(struct drm_connector *connector,
466 struct drm_display_mode *t, *cur_mode, *preferred_mode;
467 int target_refresh = 0;
469 if (list_empty(&connector->probed_modes))
472 if (quirks & EDID_QUIRK_PREFER_LARGE_60)
474 if (quirks & EDID_QUIRK_PREFER_LARGE_75)
477 preferred_mode = list_first_entry(&connector->probed_modes,
478 struct drm_display_mode, head);
480 list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) {
481 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED;
483 if (cur_mode == preferred_mode)
486 /* Largest mode is preferred */
487 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
488 preferred_mode = cur_mode;
490 /* At a given size, try to get closest to target refresh */
491 if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) &&
492 MODE_REFRESH_DIFF(cur_mode, target_refresh) <
493 MODE_REFRESH_DIFF(preferred_mode, target_refresh)) {
494 preferred_mode = cur_mode;
498 preferred_mode->type |= DRM_MODE_TYPE_PREFERRED;
502 mode_is_rb(const struct drm_display_mode *mode)
504 return (mode->htotal - mode->hdisplay == 160) &&
505 (mode->hsync_end - mode->hdisplay == 80) &&
506 (mode->hsync_end - mode->hsync_start == 32) &&
507 (mode->vsync_start - mode->vdisplay == 3);
511 * drm_mode_find_dmt - Create a copy of a mode if present in DMT
512 * @dev: Device to duplicate against
514 * @vsize: Mode height
515 * @fresh: Mode refresh rate
516 * @rb: Mode reduced-blanking-ness
518 * Walk the DMT mode list looking for a match for the given parameters.
519 * Return a newly allocated copy of the mode, or NULL if not found.
521 struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
522 int hsize, int vsize, int fresh,
527 for (i = 0; i < drm_num_dmt_modes; i++) {
528 const struct drm_display_mode *ptr = &drm_dmt_modes[i];
529 if (hsize != ptr->hdisplay)
531 if (vsize != ptr->vdisplay)
533 if (fresh != drm_mode_vrefresh(ptr))
535 if (rb != mode_is_rb(ptr))
538 return drm_mode_duplicate(dev, ptr);
543 EXPORT_SYMBOL(drm_mode_find_dmt);
545 typedef void detailed_cb(struct detailed_timing *timing, void *closure);
548 cea_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
552 u8 *det_base = ext + d;
555 for (i = 0; i < n; i++)
556 cb((struct detailed_timing *)(det_base + 18 * i), closure);
560 vtb_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
562 unsigned int i, n = min((int)ext[0x02], 6);
563 u8 *det_base = ext + 5;
566 return; /* unknown version */
568 for (i = 0; i < n; i++)
569 cb((struct detailed_timing *)(det_base + 18 * i), closure);
573 drm_for_each_detailed_block(u8 *raw_edid, detailed_cb *cb, void *closure)
576 struct edid *edid = (struct edid *)raw_edid;
581 for (i = 0; i < EDID_DETAILED_TIMINGS; i++)
582 cb(&(edid->detailed_timings[i]), closure);
584 for (i = 1; i <= raw_edid[0x7e]; i++) {
585 u8 *ext = raw_edid + (i * EDID_LENGTH);
588 cea_for_each_detailed_block(ext, cb, closure);
591 vtb_for_each_detailed_block(ext, cb, closure);
600 is_rb(struct detailed_timing *t, void *data)
603 if (r[3] == EDID_DETAIL_MONITOR_RANGE)
605 *(bool *)data = true;
608 /* EDID 1.4 defines this explicitly. For EDID 1.3, we guess, badly. */
610 drm_monitor_supports_rb(struct edid *edid)
612 if (edid->revision >= 4) {
614 drm_for_each_detailed_block((u8 *)edid, is_rb, &ret);
618 return ((edid->input & DRM_EDID_INPUT_DIGITAL) != 0);
622 find_gtf2(struct detailed_timing *t, void *data)
625 if (r[3] == EDID_DETAIL_MONITOR_RANGE && r[10] == 0x02)
629 /* Secondary GTF curve kicks in above some break frequency */
631 drm_gtf2_hbreak(struct edid *edid)
634 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
635 return r ? (r[12] * 2) : 0;
639 drm_gtf2_2c(struct edid *edid)
642 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
643 return r ? r[13] : 0;
647 drm_gtf2_m(struct edid *edid)
650 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
651 return r ? (r[15] << 8) + r[14] : 0;
655 drm_gtf2_k(struct edid *edid)
658 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
659 return r ? r[16] : 0;
663 drm_gtf2_2j(struct edid *edid)
666 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
667 return r ? r[17] : 0;
671 * standard_timing_level - get std. timing level(CVT/GTF/DMT)
672 * @edid: EDID block to scan
674 static int standard_timing_level(struct edid *edid)
676 if (edid->revision >= 2) {
677 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF))
679 if (drm_gtf2_hbreak(edid))
687 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old
688 * monitors fill with ascii space (0x20) instead.
691 bad_std_timing(u8 a, u8 b)
693 return (a == 0x00 && b == 0x00) ||
694 (a == 0x01 && b == 0x01) ||
695 (a == 0x20 && b == 0x20);
699 * drm_mode_std - convert standard mode info (width, height, refresh) into mode
700 * @t: standard timing params
701 * @timing_level: standard timing level
703 * Take the standard timing params (in this case width, aspect, and refresh)
704 * and convert them into a real mode using CVT/GTF/DMT.
706 static struct drm_display_mode *
707 drm_mode_std(struct drm_connector *connector, struct edid *edid,
708 struct std_timing *t, int revision)
710 struct drm_device *dev = connector->dev;
711 struct drm_display_mode *m, *mode = NULL;
714 unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK)
715 >> EDID_TIMING_ASPECT_SHIFT;
716 unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK)
717 >> EDID_TIMING_VFREQ_SHIFT;
718 int timing_level = standard_timing_level(edid);
720 if (bad_std_timing(t->hsize, t->vfreq_aspect))
723 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */
724 hsize = t->hsize * 8 + 248;
725 /* vrefresh_rate = vfreq + 60 */
726 vrefresh_rate = vfreq + 60;
727 /* the vdisplay is calculated based on the aspect ratio */
728 if (aspect_ratio == 0) {
732 vsize = (hsize * 10) / 16;
733 } else if (aspect_ratio == 1)
734 vsize = (hsize * 3) / 4;
735 else if (aspect_ratio == 2)
736 vsize = (hsize * 4) / 5;
738 vsize = (hsize * 9) / 16;
740 /* HDTV hack, part 1 */
741 if (vrefresh_rate == 60 &&
742 ((hsize == 1360 && vsize == 765) ||
743 (hsize == 1368 && vsize == 769))) {
749 * If this connector already has a mode for this size and refresh
750 * rate (because it came from detailed or CVT info), use that
751 * instead. This way we don't have to guess at interlace or
754 list_for_each_entry(m, &connector->probed_modes, head)
755 if (m->hdisplay == hsize && m->vdisplay == vsize &&
756 drm_mode_vrefresh(m) == vrefresh_rate)
759 /* HDTV hack, part 2 */
760 if (hsize == 1366 && vsize == 768 && vrefresh_rate == 60) {
761 mode = drm_cvt_mode(dev, 1366, 768, vrefresh_rate, 0, 0,
763 mode->hdisplay = 1366;
764 mode->hsync_start = mode->hsync_start - 1;
765 mode->hsync_end = mode->hsync_end - 1;
769 /* check whether it can be found in default mode table */
770 if (drm_monitor_supports_rb(edid)) {
771 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate,
776 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate, false);
780 /* okay, generate it */
781 switch (timing_level) {
785 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
789 * This is potentially wrong if there's ever a monitor with
790 * more than one ranges section, each claiming a different
791 * secondary GTF curve. Please don't do that.
793 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
796 if (drm_mode_hsync(mode) > drm_gtf2_hbreak(edid)) {
797 drm_mode_destroy(dev, mode);
798 mode = drm_gtf_mode_complex(dev, hsize, vsize,
807 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
815 * EDID is delightfully ambiguous about how interlaced modes are to be
816 * encoded. Our internal representation is of frame height, but some
817 * HDTV detailed timings are encoded as field height.
819 * The format list here is from CEA, in frame size. Technically we
820 * should be checking refresh rate too. Whatever.
823 drm_mode_do_interlace_quirk(struct drm_display_mode *mode,
824 struct detailed_pixel_timing *pt)
827 static const struct {
829 } cea_interlaced[] = {
839 if (!(pt->misc & DRM_EDID_PT_INTERLACED))
842 for (i = 0; i < ARRAY_SIZE(cea_interlaced); i++) {
843 if ((mode->hdisplay == cea_interlaced[i].w) &&
844 (mode->vdisplay == cea_interlaced[i].h / 2)) {
846 mode->vsync_start *= 2;
847 mode->vsync_end *= 2;
853 mode->flags |= DRM_MODE_FLAG_INTERLACE;
857 * drm_mode_detailed - create a new mode from an EDID detailed timing section
858 * @dev: DRM device (needed to create new mode)
860 * @timing: EDID detailed timing info
861 * @quirks: quirks to apply
863 * An EDID detailed timing block contains enough info for us to create and
864 * return a new struct drm_display_mode.
866 static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
868 struct detailed_timing *timing,
871 struct drm_display_mode *mode;
872 struct detailed_pixel_timing *pt = &timing->data.pixel_data;
873 unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo;
874 unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo;
875 unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo;
876 unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo;
877 unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo;
878 unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo;
879 unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4;
880 unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf);
882 /* ignore tiny modes */
883 if (hactive < 64 || vactive < 64)
886 if (pt->misc & DRM_EDID_PT_STEREO) {
887 printk(KERN_WARNING "stereo mode not supported\n");
890 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) {
891 printk(KERN_WARNING "composite sync not supported\n");
894 /* it is incorrect if hsync/vsync width is zero */
895 if (!hsync_pulse_width || !vsync_pulse_width) {
896 DRM_DEBUG_KMS("Incorrect Detailed timing. "
897 "Wrong Hsync/Vsync pulse width\n");
901 if (quirks & EDID_QUIRK_FORCE_REDUCED_BLANKING) {
902 mode = drm_cvt_mode(dev, hactive, vactive, 60, true, false, false);
909 mode = drm_mode_create(dev);
913 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
914 timing->pixel_clock = cpu_to_le16(1088);
916 mode->clock = le16_to_cpu(timing->pixel_clock) * 10;
918 mode->hdisplay = hactive;
919 mode->hsync_start = mode->hdisplay + hsync_offset;
920 mode->hsync_end = mode->hsync_start + hsync_pulse_width;
921 mode->htotal = mode->hdisplay + hblank;
923 mode->vdisplay = vactive;
924 mode->vsync_start = mode->vdisplay + vsync_offset;
925 mode->vsync_end = mode->vsync_start + vsync_pulse_width;
926 mode->vtotal = mode->vdisplay + vblank;
928 /* Some EDIDs have bogus h/vtotal values */
929 if (mode->hsync_end > mode->htotal)
930 mode->htotal = mode->hsync_end + 1;
931 if (mode->vsync_end > mode->vtotal)
932 mode->vtotal = mode->vsync_end + 1;
934 drm_mode_do_interlace_quirk(mode, pt);
936 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
937 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;
940 mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ?
941 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
942 mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ?
943 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
946 mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4;
947 mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8;
949 if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
950 mode->width_mm *= 10;
951 mode->height_mm *= 10;
954 if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) {
955 mode->width_mm = edid->width_cm * 10;
956 mode->height_mm = edid->height_cm * 10;
959 mode->type = DRM_MODE_TYPE_DRIVER;
960 drm_mode_set_name(mode);
966 mode_in_hsync_range(const struct drm_display_mode *mode,
967 struct edid *edid, u8 *t)
969 int hsync, hmin, hmax;
972 if (edid->revision >= 4)
973 hmin += ((t[4] & 0x04) ? 255 : 0);
975 if (edid->revision >= 4)
976 hmax += ((t[4] & 0x08) ? 255 : 0);
977 hsync = drm_mode_hsync(mode);
979 return (hsync <= hmax && hsync >= hmin);
983 mode_in_vsync_range(const struct drm_display_mode *mode,
984 struct edid *edid, u8 *t)
986 int vsync, vmin, vmax;
989 if (edid->revision >= 4)
990 vmin += ((t[4] & 0x01) ? 255 : 0);
992 if (edid->revision >= 4)
993 vmax += ((t[4] & 0x02) ? 255 : 0);
994 vsync = drm_mode_vrefresh(mode);
996 return (vsync <= vmax && vsync >= vmin);
1000 range_pixel_clock(struct edid *edid, u8 *t)
1003 if (t[9] == 0 || t[9] == 255)
1006 /* 1.4 with CVT support gives us real precision, yay */
1007 if (edid->revision >= 4 && t[10] == 0x04)
1008 return (t[9] * 10000) - ((t[12] >> 2) * 250);
1010 /* 1.3 is pathetic, so fuzz up a bit */
1011 return t[9] * 10000 + 5001;
1015 mode_in_range(const struct drm_display_mode *mode, struct edid *edid,
1016 struct detailed_timing *timing)
1019 u8 *t = (u8 *)timing;
1021 if (!mode_in_hsync_range(mode, edid, t))
1024 if (!mode_in_vsync_range(mode, edid, t))
1027 if ((max_clock = range_pixel_clock(edid, t)))
1028 if (mode->clock > max_clock)
1031 /* 1.4 max horizontal check */
1032 if (edid->revision >= 4 && t[10] == 0x04)
1033 if (t[13] && mode->hdisplay > 8 * (t[13] + (256 * (t[12]&0x3))))
1036 if (mode_is_rb(mode) && !drm_monitor_supports_rb(edid))
1043 drm_dmt_modes_for_range(struct drm_connector *connector, struct edid *edid,
1044 struct detailed_timing *timing)
1047 struct drm_display_mode *newmode;
1048 struct drm_device *dev = connector->dev;
1050 for (i = 0; i < drm_num_dmt_modes; i++) {
1051 if (mode_in_range(drm_dmt_modes + i, edid, timing)) {
1052 newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]);
1054 drm_mode_probed_add(connector, newmode);
1063 /* fix up 1366x768 mode from 1368x768;
1064 * GFT/CVT can't express 1366 width which isn't dividable by 8
1066 static void fixup_mode_1366x768(struct drm_display_mode *mode)
1068 if (mode->hdisplay == 1368 && mode->vdisplay == 768) {
1069 mode->hdisplay = 1366;
1070 mode->hsync_start--;
1072 drm_mode_set_name(mode);
1077 drm_gtf_modes_for_range(struct drm_connector *connector, struct edid *edid,
1078 struct detailed_timing *timing)
1081 struct drm_display_mode *newmode;
1082 struct drm_device *dev = connector->dev;
1084 for (i = 0; i < num_extra_modes; i++) {
1085 const struct minimode *m = &extra_modes[i];
1086 newmode = drm_gtf_mode(dev, m->w, m->h, m->r, 0, 0);
1090 fixup_mode_1366x768(newmode);
1091 if (!mode_in_range(newmode, edid, timing)) {
1092 drm_mode_destroy(dev, newmode);
1096 drm_mode_probed_add(connector, newmode);
1104 drm_cvt_modes_for_range(struct drm_connector *connector, struct edid *edid,
1105 struct detailed_timing *timing)
1108 struct drm_display_mode *newmode;
1109 struct drm_device *dev = connector->dev;
1110 bool rb = drm_monitor_supports_rb(edid);
1112 for (i = 0; i < num_extra_modes; i++) {
1113 const struct minimode *m = &extra_modes[i];
1114 newmode = drm_cvt_mode(dev, m->w, m->h, m->r, rb, 0, 0);
1118 fixup_mode_1366x768(newmode);
1119 if (!mode_in_range(newmode, edid, timing)) {
1120 drm_mode_destroy(dev, newmode);
1124 drm_mode_probed_add(connector, newmode);
1132 do_inferred_modes(struct detailed_timing *timing, void *c)
1134 struct detailed_mode_closure *closure = c;
1135 struct detailed_non_pixel *data = &timing->data.other_data;
1136 struct detailed_data_monitor_range *range = &data->data.range;
1138 if (data->type != EDID_DETAIL_MONITOR_RANGE)
1141 closure->modes += drm_dmt_modes_for_range(closure->connector,
1145 if (!version_greater(closure->edid, 1, 1))
1146 return; /* GTF not defined yet */
1148 switch (range->flags) {
1149 case 0x02: /* secondary gtf, XXX could do more */
1150 case 0x00: /* default gtf */
1151 closure->modes += drm_gtf_modes_for_range(closure->connector,
1155 case 0x04: /* cvt, only in 1.4+ */
1156 if (!version_greater(closure->edid, 1, 3))
1159 closure->modes += drm_cvt_modes_for_range(closure->connector,
1163 case 0x01: /* just the ranges, no formula */
1170 add_inferred_modes(struct drm_connector *connector, struct edid *edid)
1172 struct detailed_mode_closure closure = {
1173 connector, edid, 0, 0, 0
1176 if (version_greater(edid, 1, 0))
1177 drm_for_each_detailed_block((u8 *)edid, do_inferred_modes,
1180 return closure.modes;
1184 drm_est3_modes(struct drm_connector *connector, struct detailed_timing *timing)
1186 int i, j, m, modes = 0;
1187 struct drm_display_mode *mode;
1188 u8 *est = ((u8 *)timing) + 5;
1190 for (i = 0; i < 6; i++) {
1191 for (j = 7; j > 0; j--) {
1192 m = (i * 8) + (7 - j);
1193 if (m >= ARRAY_SIZE(est3_modes))
1195 if (est[i] & (1 << j)) {
1196 mode = drm_mode_find_dmt(connector->dev,
1202 drm_mode_probed_add(connector, mode);
1213 do_established_modes(struct detailed_timing *timing, void *c)
1215 struct detailed_mode_closure *closure = c;
1216 struct detailed_non_pixel *data = &timing->data.other_data;
1218 if (data->type == EDID_DETAIL_EST_TIMINGS)
1219 closure->modes += drm_est3_modes(closure->connector, timing);
1223 * add_established_modes - get est. modes from EDID and add them
1224 * @edid: EDID block to scan
1226 * Each EDID block contains a bitmap of the supported "established modes" list
1227 * (defined above). Tease them out and add them to the global modes list.
1230 add_established_modes(struct drm_connector *connector, struct edid *edid)
1232 struct drm_device *dev = connector->dev;
1233 unsigned long est_bits = edid->established_timings.t1 |
1234 (edid->established_timings.t2 << 8) |
1235 ((edid->established_timings.mfg_rsvd & 0x80) << 9);
1237 struct detailed_mode_closure closure = {
1238 connector, edid, 0, 0, 0
1241 for (i = 0; i <= EDID_EST_TIMINGS; i++) {
1242 if (est_bits & (1<<i)) {
1243 struct drm_display_mode *newmode;
1244 newmode = drm_mode_duplicate(dev, &edid_est_modes[i]);
1246 drm_mode_probed_add(connector, newmode);
1252 if (version_greater(edid, 1, 0))
1253 drm_for_each_detailed_block((u8 *)edid,
1254 do_established_modes, &closure);
1256 return modes + closure.modes;
1260 do_standard_modes(struct detailed_timing *timing, void *c)
1262 struct detailed_mode_closure *closure = c;
1263 struct detailed_non_pixel *data = &timing->data.other_data;
1264 struct drm_connector *connector = closure->connector;
1265 struct edid *edid = closure->edid;
1267 if (data->type == EDID_DETAIL_STD_MODES) {
1269 for (i = 0; i < 6; i++) {
1270 struct std_timing *std;
1271 struct drm_display_mode *newmode;
1273 std = &data->data.timings[i];
1274 newmode = drm_mode_std(connector, edid, std,
1277 drm_mode_probed_add(connector, newmode);
1285 * add_standard_modes - get std. modes from EDID and add them
1286 * @edid: EDID block to scan
1288 * Standard modes can be calculated using the appropriate standard (DMT,
1289 * GTF or CVT. Grab them from @edid and add them to the list.
1292 add_standard_modes(struct drm_connector *connector, struct edid *edid)
1295 struct detailed_mode_closure closure = {
1296 connector, edid, 0, 0, 0
1299 for (i = 0; i < EDID_STD_TIMINGS; i++) {
1300 struct drm_display_mode *newmode;
1302 newmode = drm_mode_std(connector, edid,
1303 &edid->standard_timings[i],
1306 drm_mode_probed_add(connector, newmode);
1311 if (version_greater(edid, 1, 0))
1312 drm_for_each_detailed_block((u8 *)edid, do_standard_modes,
1315 /* XXX should also look for standard codes in VTB blocks */
1317 return modes + closure.modes;
1320 static int drm_cvt_modes(struct drm_connector *connector,
1321 struct detailed_timing *timing)
1323 int i, j, modes = 0;
1324 struct drm_display_mode *newmode;
1325 struct drm_device *dev = connector->dev;
1326 struct cvt_timing *cvt;
1327 const int rates[] = { 60, 85, 75, 60, 50 };
1328 const u8 empty[3] = { 0, 0, 0 };
1330 for (i = 0; i < 4; i++) {
1331 int uninitialized_var(width), height;
1332 cvt = &(timing->data.other_data.data.cvt[i]);
1334 if (!memcmp(cvt->code, empty, 3))
1337 height = (cvt->code[0] + ((cvt->code[1] & 0xf0) << 4) + 1) * 2;
1338 switch (cvt->code[1] & 0x0c) {
1340 width = height * 4 / 3;
1343 width = height * 16 / 9;
1346 width = height * 16 / 10;
1349 width = height * 15 / 9;
1353 for (j = 1; j < 5; j++) {
1354 if (cvt->code[2] & (1 << j)) {
1355 newmode = drm_cvt_mode(dev, width, height,
1359 drm_mode_probed_add(connector, newmode);
1370 do_cvt_mode(struct detailed_timing *timing, void *c)
1372 struct detailed_mode_closure *closure = c;
1373 struct detailed_non_pixel *data = &timing->data.other_data;
1375 if (data->type == EDID_DETAIL_CVT_3BYTE)
1376 closure->modes += drm_cvt_modes(closure->connector, timing);
1380 add_cvt_modes(struct drm_connector *connector, struct edid *edid)
1382 struct detailed_mode_closure closure = {
1383 connector, edid, 0, 0, 0
1386 if (version_greater(edid, 1, 2))
1387 drm_for_each_detailed_block((u8 *)edid, do_cvt_mode, &closure);
1389 /* XXX should also look for CVT codes in VTB blocks */
1391 return closure.modes;
1395 do_detailed_mode(struct detailed_timing *timing, void *c)
1397 struct detailed_mode_closure *closure = c;
1398 struct drm_display_mode *newmode;
1400 if (timing->pixel_clock) {
1401 newmode = drm_mode_detailed(closure->connector->dev,
1402 closure->edid, timing,
1407 if (closure->preferred)
1408 newmode->type |= DRM_MODE_TYPE_PREFERRED;
1410 drm_mode_probed_add(closure->connector, newmode);
1412 closure->preferred = 0;
1417 * add_detailed_modes - Add modes from detailed timings
1418 * @connector: attached connector
1419 * @edid: EDID block to scan
1420 * @quirks: quirks to apply
1423 add_detailed_modes(struct drm_connector *connector, struct edid *edid,
1426 struct detailed_mode_closure closure = {
1434 if (closure.preferred && !version_greater(edid, 1, 3))
1436 (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING);
1438 drm_for_each_detailed_block((u8 *)edid, do_detailed_mode, &closure);
1440 return closure.modes;
1443 #define HDMI_IDENTIFIER 0x000C03
1444 #define AUDIO_BLOCK 0x01
1445 #define VIDEO_BLOCK 0x02
1446 #define VENDOR_BLOCK 0x03
1447 #define SPEAKER_BLOCK 0x04
1448 #define EDID_BASIC_AUDIO (1 << 6)
1449 #define EDID_CEA_YCRCB444 (1 << 5)
1450 #define EDID_CEA_YCRCB422 (1 << 4)
1453 * Search EDID for CEA extension block.
1455 u8 *drm_find_cea_extension(struct edid *edid)
1457 u8 *edid_ext = NULL;
1460 /* No EDID or EDID extensions */
1461 if (edid == NULL || edid->extensions == 0)
1464 /* Find CEA extension */
1465 for (i = 0; i < edid->extensions; i++) {
1466 edid_ext = (u8 *)edid + EDID_LENGTH * (i + 1);
1467 if (edid_ext[0] == CEA_EXT)
1471 if (i == edid->extensions)
1476 EXPORT_SYMBOL(drm_find_cea_extension);
1479 do_cea_modes (struct drm_connector *connector, u8 *db, u8 len)
1481 struct drm_device *dev = connector->dev;
1482 u8 * mode, cea_mode;
1485 for (mode = db; mode < db + len; mode++) {
1486 cea_mode = (*mode & 127) - 1; /* CEA modes are numbered 1..127 */
1487 if (cea_mode < drm_num_cea_modes) {
1488 struct drm_display_mode *newmode;
1489 newmode = drm_mode_duplicate(dev,
1490 &edid_cea_modes[cea_mode]);
1492 drm_mode_probed_add(connector, newmode);
1502 add_cea_modes(struct drm_connector *connector, struct edid *edid)
1504 u8 * cea = drm_find_cea_extension(edid);
1508 if (cea && cea[1] >= 3) {
1509 for (db = cea + 4; db < cea + cea[2]; db += dbl + 1) {
1511 if (((db[0] & 0xe0) >> 5) == VIDEO_BLOCK)
1512 modes += do_cea_modes (connector, db+1, dbl);
1520 parse_hdmi_vsdb(struct drm_connector *connector, uint8_t *db)
1522 connector->eld[5] |= (db[6] >> 7) << 1; /* Supports_AI */
1524 connector->dvi_dual = db[6] & 1;
1525 connector->max_tmds_clock = db[7] * 5;
1527 connector->latency_present[0] = db[8] >> 7;
1528 connector->latency_present[1] = (db[8] >> 6) & 1;
1529 connector->video_latency[0] = db[9];
1530 connector->audio_latency[0] = db[10];
1531 connector->video_latency[1] = db[11];
1532 connector->audio_latency[1] = db[12];
1534 DRM_LOG_KMS("HDMI: DVI dual %d, "
1535 "max TMDS clock %d, "
1536 "latency present %d %d, "
1537 "video latency %d %d, "
1538 "audio latency %d %d\n",
1539 connector->dvi_dual,
1540 connector->max_tmds_clock,
1541 (int) connector->latency_present[0],
1542 (int) connector->latency_present[1],
1543 connector->video_latency[0],
1544 connector->video_latency[1],
1545 connector->audio_latency[0],
1546 connector->audio_latency[1]);
1550 monitor_name(struct detailed_timing *t, void *data)
1552 if (t->data.other_data.type == EDID_DETAIL_MONITOR_NAME)
1553 *(u8 **)data = t->data.other_data.data.str.str;
1557 * drm_edid_to_eld - build ELD from EDID
1558 * @connector: connector corresponding to the HDMI/DP sink
1559 * @edid: EDID to parse
1561 * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver.
1562 * Some ELD fields are left to the graphics driver caller:
1567 void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
1569 uint8_t *eld = connector->eld;
1577 memset(eld, 0, sizeof(connector->eld));
1579 cea = drm_find_cea_extension(edid);
1581 DRM_DEBUG_KMS("ELD: no CEA Extension found\n");
1586 drm_for_each_detailed_block((u8 *)edid, monitor_name, &name);
1587 for (mnl = 0; name && mnl < 13; mnl++) {
1588 if (name[mnl] == 0x0a)
1590 eld[20 + mnl] = name[mnl];
1592 eld[4] = (cea[1] << 5) | mnl;
1593 DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20);
1595 eld[0] = 2 << 3; /* ELD version: 2 */
1597 eld[16] = edid->mfg_id[0];
1598 eld[17] = edid->mfg_id[1];
1599 eld[18] = edid->prod_code[0];
1600 eld[19] = edid->prod_code[1];
1603 for (db = cea + 4; db < cea + cea[2]; db += dbl + 1) {
1606 switch ((db[0] & 0xe0) >> 5) {
1608 /* Audio Data Block, contains SADs */
1609 sad_count = dbl / 3;
1610 memcpy(eld + 20 + mnl, &db[1], dbl);
1613 /* Speaker Allocation Data Block */
1617 /* HDMI Vendor-Specific Data Block */
1618 if (db[1] == 0x03 && db[2] == 0x0c && db[3] == 0)
1619 parse_hdmi_vsdb(connector, db);
1625 eld[5] |= sad_count << 4;
1626 eld[2] = (20 + mnl + sad_count * 3 + 3) / 4;
1628 DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", (int)eld[2], sad_count);
1630 EXPORT_SYMBOL(drm_edid_to_eld);
1633 * drm_av_sync_delay - HDMI/DP sink audio-video sync delay in millisecond
1634 * @connector: connector associated with the HDMI/DP sink
1635 * @mode: the display mode
1637 int drm_av_sync_delay(struct drm_connector *connector,
1638 struct drm_display_mode *mode)
1640 int i = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
1643 if (!connector->latency_present[0])
1645 if (!connector->latency_present[1])
1648 a = connector->audio_latency[i];
1649 v = connector->video_latency[i];
1652 * HDMI/DP sink doesn't support audio or video?
1654 if (a == 255 || v == 255)
1658 * Convert raw EDID values to millisecond.
1659 * Treat unknown latency as 0ms.
1662 a = min(2 * (a - 1), 500);
1664 v = min(2 * (v - 1), 500);
1666 return max(v - a, 0);
1668 EXPORT_SYMBOL(drm_av_sync_delay);
1671 * drm_select_eld - select one ELD from multiple HDMI/DP sinks
1672 * @encoder: the encoder just changed display mode
1673 * @mode: the adjusted display mode
1675 * It's possible for one encoder to be associated with multiple HDMI/DP sinks.
1676 * The policy is now hard coded to simply use the first HDMI/DP sink's ELD.
1678 struct drm_connector *drm_select_eld(struct drm_encoder *encoder,
1679 struct drm_display_mode *mode)
1681 struct drm_connector *connector;
1682 struct drm_device *dev = encoder->dev;
1684 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
1685 if (connector->encoder == encoder && connector->eld[0])
1690 EXPORT_SYMBOL(drm_select_eld);
1693 * drm_detect_hdmi_monitor - detect whether monitor is hdmi.
1694 * @edid: monitor EDID information
1696 * Parse the CEA extension according to CEA-861-B.
1697 * Return true if HDMI, false if not or unknown.
1699 bool drm_detect_hdmi_monitor(struct edid *edid)
1703 int start_offset, end_offset;
1704 bool is_hdmi = false;
1706 edid_ext = drm_find_cea_extension(edid);
1710 /* Data block offset in CEA extension block */
1712 end_offset = edid_ext[2];
1715 * Because HDMI identifier is in Vendor Specific Block,
1716 * search it from all data blocks of CEA extension.
1718 for (i = start_offset; i < end_offset;
1719 /* Increased by data block len */
1720 i += ((edid_ext[i] & 0x1f) + 1)) {
1721 /* Find vendor specific block */
1722 if ((edid_ext[i] >> 5) == VENDOR_BLOCK) {
1723 hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) |
1724 edid_ext[i + 3] << 16;
1725 /* Find HDMI identifier */
1726 if (hdmi_id == HDMI_IDENTIFIER)
1735 EXPORT_SYMBOL(drm_detect_hdmi_monitor);
1738 * drm_detect_monitor_audio - check monitor audio capability
1740 * Monitor should have CEA extension block.
1741 * If monitor has 'basic audio', but no CEA audio blocks, it's 'basic
1742 * audio' only. If there is any audio extension block and supported
1743 * audio format, assume at least 'basic audio' support, even if 'basic
1744 * audio' is not defined in EDID.
1747 bool drm_detect_monitor_audio(struct edid *edid)
1751 bool has_audio = false;
1752 int start_offset, end_offset;
1754 edid_ext = drm_find_cea_extension(edid);
1758 has_audio = ((edid_ext[3] & EDID_BASIC_AUDIO) != 0);
1761 DRM_DEBUG_KMS("Monitor has basic audio support\n");
1765 /* Data block offset in CEA extension block */
1767 end_offset = edid_ext[2];
1769 for (i = start_offset; i < end_offset;
1770 i += ((edid_ext[i] & 0x1f) + 1)) {
1771 if ((edid_ext[i] >> 5) == AUDIO_BLOCK) {
1773 for (j = 1; j < (edid_ext[i] & 0x1f); j += 3)
1774 DRM_DEBUG_KMS("CEA audio format %d\n",
1775 (edid_ext[i + j] >> 3) & 0xf);
1782 EXPORT_SYMBOL(drm_detect_monitor_audio);
1785 * drm_add_display_info - pull display info out if present
1787 * @info: display info (attached to connector)
1789 * Grab any available display info and stuff it into the drm_display_info
1790 * structure that's part of the connector. Useful for tracking bpp and
1793 static void drm_add_display_info(struct edid *edid,
1794 struct drm_display_info *info)
1798 info->width_mm = edid->width_cm * 10;
1799 info->height_mm = edid->height_cm * 10;
1801 /* driver figures it out in this case */
1803 info->color_formats = 0;
1805 if (edid->revision < 3)
1808 if (!(edid->input & DRM_EDID_INPUT_DIGITAL))
1811 /* Get data from CEA blocks if present */
1812 edid_ext = drm_find_cea_extension(edid);
1814 info->cea_rev = edid_ext[1];
1816 /* The existence of a CEA block should imply RGB support */
1817 info->color_formats = DRM_COLOR_FORMAT_RGB444;
1818 if (edid_ext[3] & EDID_CEA_YCRCB444)
1819 info->color_formats |= DRM_COLOR_FORMAT_YCRCB444;
1820 if (edid_ext[3] & EDID_CEA_YCRCB422)
1821 info->color_formats |= DRM_COLOR_FORMAT_YCRCB422;
1824 /* Only defined for 1.4 with digital displays */
1825 if (edid->revision < 4)
1828 switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) {
1829 case DRM_EDID_DIGITAL_DEPTH_6:
1832 case DRM_EDID_DIGITAL_DEPTH_8:
1835 case DRM_EDID_DIGITAL_DEPTH_10:
1838 case DRM_EDID_DIGITAL_DEPTH_12:
1841 case DRM_EDID_DIGITAL_DEPTH_14:
1844 case DRM_EDID_DIGITAL_DEPTH_16:
1847 case DRM_EDID_DIGITAL_DEPTH_UNDEF:
1853 info->color_formats |= DRM_COLOR_FORMAT_RGB444;
1854 if (edid->features & DRM_EDID_FEATURE_RGB_YCRCB444)
1855 info->color_formats |= DRM_COLOR_FORMAT_YCRCB444;
1856 if (edid->features & DRM_EDID_FEATURE_RGB_YCRCB422)
1857 info->color_formats |= DRM_COLOR_FORMAT_YCRCB422;
1861 * drm_add_edid_modes - add modes from EDID data, if available
1862 * @connector: connector we're probing
1865 * Add the specified modes to the connector's mode list.
1867 * Return number of modes added or 0 if we couldn't find any.
1869 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
1877 if (!drm_edid_is_valid(edid)) {
1878 dev_warn(connector->dev->dev, "%s: EDID invalid.\n",
1879 drm_get_connector_name(connector));
1883 quirks = edid_get_quirks(edid);
1886 * EDID spec says modes should be preferred in this order:
1887 * - preferred detailed mode
1888 * - other detailed modes from base block
1889 * - detailed modes from extension blocks
1890 * - CVT 3-byte code modes
1891 * - standard timing codes
1892 * - established timing codes
1893 * - modes inferred from GTF or CVT range information
1895 * We get this pretty much right.
1897 * XXX order for additional mode types in extension blocks?
1899 num_modes += add_detailed_modes(connector, edid, quirks);
1900 num_modes += add_cvt_modes(connector, edid);
1901 num_modes += add_standard_modes(connector, edid);
1902 num_modes += add_established_modes(connector, edid);
1903 num_modes += add_inferred_modes(connector, edid);
1904 num_modes += add_cea_modes(connector, edid);
1906 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
1907 edid_fixup_preferred(connector, quirks);
1909 drm_add_display_info(edid, &connector->display_info);
1913 EXPORT_SYMBOL(drm_add_edid_modes);
1916 * drm_add_modes_noedid - add modes for the connectors without EDID
1917 * @connector: connector we're probing
1918 * @hdisplay: the horizontal display limit
1919 * @vdisplay: the vertical display limit
1921 * Add the specified modes to the connector's mode list. Only when the
1922 * hdisplay/vdisplay is not beyond the given limit, it will be added.
1924 * Return number of modes added or 0 if we couldn't find any.
1926 int drm_add_modes_noedid(struct drm_connector *connector,
1927 int hdisplay, int vdisplay)
1929 int i, count, num_modes = 0;
1930 struct drm_display_mode *mode;
1931 struct drm_device *dev = connector->dev;
1933 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
1939 for (i = 0; i < count; i++) {
1940 const struct drm_display_mode *ptr = &drm_dmt_modes[i];
1941 if (hdisplay && vdisplay) {
1943 * Only when two are valid, they will be used to check
1944 * whether the mode should be added to the mode list of
1947 if (ptr->hdisplay > hdisplay ||
1948 ptr->vdisplay > vdisplay)
1951 if (drm_mode_vrefresh(ptr) > 61)
1953 mode = drm_mode_duplicate(dev, ptr);
1955 drm_mode_probed_add(connector, mode);
1961 EXPORT_SYMBOL(drm_add_modes_noedid);