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 * $FreeBSD: head/sys/dev/drm2/drm_edid.c 249041 2013-04-03 08:27:35Z dumbbell $
33 #include <linux/export.h>
35 #include <drm/drm_crtc.h>
36 #include <drm/drm_edid.h>
37 #include "drm_edid_modes.h"
38 #include <bus/iicbus/iic.h>
39 #include <bus/iicbus/iiconf.h>
40 #include "iicbus_if.h"
42 #define version_greater(edid, maj, min) \
43 (((edid)->version > (maj)) || \
44 ((edid)->version == (maj) && (edid)->revision > (min)))
46 #define EDID_EST_TIMINGS 16
47 #define EDID_STD_TIMINGS 8
48 #define EDID_DETAILED_TIMINGS 4
51 * EDID blocks out in the wild have a variety of bugs, try to collect
52 * them here (note that userspace may work around broken monitors first,
53 * but fixes should make their way here so that the kernel "just works"
54 * on as many displays as possible).
57 /* First detailed mode wrong, use largest 60Hz mode */
58 #define EDID_QUIRK_PREFER_LARGE_60 (1 << 0)
59 /* Reported 135MHz pixel clock is too high, needs adjustment */
60 #define EDID_QUIRK_135_CLOCK_TOO_HIGH (1 << 1)
61 /* Prefer the largest mode at 75 Hz */
62 #define EDID_QUIRK_PREFER_LARGE_75 (1 << 2)
63 /* Detail timing is in cm not mm */
64 #define EDID_QUIRK_DETAILED_IN_CM (1 << 3)
65 /* Detailed timing descriptors have bogus size values, so just take the
66 * maximum size and use that.
68 #define EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE (1 << 4)
69 /* Monitor forgot to set the first detailed is preferred bit. */
70 #define EDID_QUIRK_FIRST_DETAILED_PREFERRED (1 << 5)
71 /* use +hsync +vsync for detailed mode */
72 #define EDID_QUIRK_DETAILED_SYNC_PP (1 << 6)
74 struct detailed_mode_closure {
75 struct drm_connector *connector;
87 static struct edid_quirk {
91 } edid_quirk_list[] = {
93 { "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 },
95 { "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60 },
97 { "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
99 /* Belinea 10 15 55 */
100 { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
101 { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
103 /* Envision Peripherals, Inc. EN-7100e */
104 { "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH },
105 /* Envision EN2028 */
106 { "EPI", 8232, EDID_QUIRK_PREFER_LARGE_60 },
108 /* Funai Electronics PM36B */
109 { "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 |
110 EDID_QUIRK_DETAILED_IN_CM },
112 /* LG Philips LCD LP154W01-A5 */
113 { "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
114 { "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
116 /* Philips 107p5 CRT */
117 { "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
120 { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
122 /* Samsung SyncMaster 205BW. Note: irony */
123 { "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP },
124 /* Samsung SyncMaster 22[5-6]BW */
125 { "SAM", 596, EDID_QUIRK_PREFER_LARGE_60 },
126 { "SAM", 638, EDID_QUIRK_PREFER_LARGE_60 },
129 /*** DDC fetch and block validation ***/
131 static const u8 edid_header[] = {
132 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00
136 * Sanity check the header of the base EDID block. Return 8 if the header
137 * is perfect, down to 0 if it's totally wrong.
139 int drm_edid_header_is_valid(const u8 *raw_edid)
143 for (i = 0; i < sizeof(edid_header); i++)
144 if (raw_edid[i] == edid_header[i])
151 * Sanity check the EDID block (base or extension). Return 0 if the block
152 * doesn't check out, or 1 if it's valid.
155 drm_edid_block_valid(u8 *raw_edid)
159 struct edid *edid = (struct edid *)raw_edid;
161 if (raw_edid[0] == 0x00) {
162 int score = drm_edid_header_is_valid(raw_edid);
164 else if (score >= 6) {
165 DRM_DEBUG("Fixing EDID header, your hardware may be failing\n");
166 memcpy(raw_edid, edid_header, sizeof(edid_header));
172 for (i = 0; i < EDID_LENGTH; i++)
175 DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum);
177 /* allow CEA to slide through, switches mangle this */
178 if (raw_edid[0] != 0x02)
182 /* per-block-type checks */
183 switch (raw_edid[0]) {
185 if (edid->version != 1) {
186 DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
190 if (edid->revision > 4)
191 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
202 DRM_DEBUG_KMS("Raw EDID:\n");
203 if ((drm_debug & DRM_DEBUGBITS_KMS) != 0) {
204 for (i = 0; i < EDID_LENGTH; ) {
205 kprintf("%02x", raw_edid[i]);
207 if (i % 16 == 0 || i == EDID_LENGTH)
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))
240 #define DDC_ADDR 0x50
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(device_t adapter, unsigned char *buf,
256 unsigned char start = block * EDID_LENGTH;
257 unsigned char segment = block >> 1;
258 unsigned char xfers = segment ? 3 : 2;
259 int ret, retries = 5;
261 /* The core i2c driver will automatically retry the transfer if the
262 * adapter reports EAGAIN. However, we find that bit-banging transfers
263 * are susceptible to errors under a heavily loaded machine and
264 * generate spurious NAKs and timeouts. Retrying the transfer
265 * of the individual block a few times seems to overcome this.
268 struct iic_msg msgs[] = {
270 .slave = DDC_SEGMENT_ADDR << 1,
275 .slave = DDC_ADDR << 1,
280 .slave = DDC_ADDR << 1,
288 * Avoid sending the segment addr to not upset non-compliant ddc
291 ret = iicbus_transfer(adapter, &msgs[3 - xfers], xfers);
294 DRM_DEBUG_KMS("iicbus_transfer countdown %d error %d\n",
296 } while (ret != 0 && --retries);
298 return (ret == 0 ? 0 : -1);
301 static bool drm_edid_is_zero(u8 *in_edid, int length)
304 u32 *raw_edid = (u32 *)in_edid;
306 for (i = 0; i < length / 4; i++)
307 if (*(raw_edid + i) != 0)
313 drm_do_get_edid(struct drm_connector *connector, device_t adapter)
315 int i, j = 0, valid_extensions = 0;
318 block = kmalloc(EDID_LENGTH, DRM_MEM_KMS, M_WAITOK | M_ZERO);
320 /* base block fetch */
321 for (i = 0; i < 4; i++) {
322 if (drm_do_probe_ddc_edid(adapter, block, 0, EDID_LENGTH))
324 if (drm_edid_block_valid(block))
326 if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) {
327 connector->null_edid_counter++;
334 /* if there's no extensions, we're done */
335 if (block[0x7e] == 0)
338 new = krealloc(block, (block[0x7e] + 1) * EDID_LENGTH, DRM_MEM_KMS,
342 for (j = 1; j <= block[0x7e]; j++) {
343 for (i = 0; i < 4; i++) {
344 if (drm_do_probe_ddc_edid(adapter,
345 block + (valid_extensions + 1) * EDID_LENGTH,
348 if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH)) {
354 DRM_DEBUG_KMS("%s: Ignoring invalid EDID block %d.\n",
355 drm_get_connector_name(connector), j);
358 if (valid_extensions != block[0x7e]) {
359 block[EDID_LENGTH-1] += block[0x7e] - valid_extensions;
360 block[0x7e] = valid_extensions;
361 new = krealloc(block, (valid_extensions + 1) * EDID_LENGTH,
362 DRM_MEM_KMS, M_WAITOK);
366 DRM_DEBUG_KMS("got EDID from %s\n", drm_get_connector_name(connector));
370 DRM_ERROR("%s: EDID block %d invalid.\n",
371 drm_get_connector_name(connector), j);
374 drm_free(block, DRM_MEM_KMS);
379 * Probe DDC presence.
381 * \param adapter : i2c device adaptor
382 * \return 1 on success
385 drm_probe_ddc(device_t adapter)
389 return (drm_do_probe_ddc_edid(adapter, &out, 0, 1) == 0);
393 * drm_get_edid - get EDID data, if available
394 * @connector: connector we're probing
395 * @adapter: i2c adapter to use for DDC
397 * Poke the given i2c channel to grab EDID data if possible. If found,
398 * attach it to the connector.
400 * Return edid data or NULL if we couldn't find any.
402 struct edid *drm_get_edid(struct drm_connector *connector,
405 struct edid *edid = NULL;
407 if (drm_probe_ddc(adapter))
408 edid = (struct edid *)drm_do_get_edid(connector, adapter);
412 EXPORT_SYMBOL(drm_get_edid);
414 /*** EDID parsing ***/
417 * edid_vendor - match a string against EDID's obfuscated vendor field
418 * @edid: EDID to match
419 * @vendor: vendor string
421 * Returns true if @vendor is in @edid, false otherwise
423 static bool edid_vendor(struct edid *edid, char *vendor)
427 edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@';
428 edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) |
429 ((edid->mfg_id[1] & 0xe0) >> 5)) + '@';
430 edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@';
432 return !strncmp(edid_vendor, vendor, 3);
436 * edid_get_quirks - return quirk flags for a given EDID
437 * @edid: EDID to process
439 * This tells subsequent routines what fixes they need to apply.
441 static u32 edid_get_quirks(struct edid *edid)
443 struct edid_quirk *quirk;
446 for (i = 0; i < DRM_ARRAY_SIZE(edid_quirk_list); i++) {
447 quirk = &edid_quirk_list[i];
449 if (edid_vendor(edid, quirk->vendor) &&
450 (EDID_PRODUCT_ID(edid) == quirk->product_id))
451 return quirk->quirks;
457 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
458 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
461 * edid_fixup_preferred - set preferred modes based on quirk list
462 * @connector: has mode list to fix up
463 * @quirks: quirks list
465 * Walk the mode list for @connector, clearing the preferred status
466 * on existing modes and setting it anew for the right mode ala @quirks.
468 static void edid_fixup_preferred(struct drm_connector *connector,
471 struct drm_display_mode *t, *cur_mode, *preferred_mode;
472 int target_refresh = 0;
474 if (list_empty(&connector->probed_modes))
477 if (quirks & EDID_QUIRK_PREFER_LARGE_60)
479 if (quirks & EDID_QUIRK_PREFER_LARGE_75)
482 preferred_mode = list_first_entry(&connector->probed_modes,
483 struct drm_display_mode, head);
485 list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) {
486 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED;
488 if (cur_mode == preferred_mode)
491 /* Largest mode is preferred */
492 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
493 preferred_mode = cur_mode;
495 /* At a given size, try to get closest to target refresh */
496 if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) &&
497 MODE_REFRESH_DIFF(cur_mode, target_refresh) <
498 MODE_REFRESH_DIFF(preferred_mode, target_refresh)) {
499 preferred_mode = cur_mode;
503 preferred_mode->type |= DRM_MODE_TYPE_PREFERRED;
507 * drm_mode_find_dmt - Create a copy of a mode if present in DMT
508 * @dev: Device to duplicate against
510 * @vsize: Mode height
511 * @fresh: Mode refresh rate
512 * @rb: Mode reduced-blanking-ness
514 * Walk the DMT mode list looking for a match for the given parameters.
515 * Return a newly allocated copy of the mode, or NULL if not found.
517 struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
518 int hsize, int vsize, int fresh)
520 struct drm_display_mode *mode = NULL;
523 for (i = 0; i < drm_num_dmt_modes; i++) {
524 struct drm_display_mode *ptr = &drm_dmt_modes[i];
525 if (hsize == ptr->hdisplay &&
526 vsize == ptr->vdisplay &&
527 fresh == drm_mode_vrefresh(ptr)) {
528 /* get the expected default mode */
529 mode = drm_mode_duplicate(dev, ptr);
535 EXPORT_SYMBOL(drm_mode_find_dmt);
537 typedef void detailed_cb(struct detailed_timing *timing, void *closure);
540 cea_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
544 u8 *det_base = ext + d;
547 for (i = 0; i < n; i++)
548 cb((struct detailed_timing *)(det_base + 18 * i), closure);
552 vtb_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
554 unsigned int i, n = min((int)ext[0x02], 6);
555 u8 *det_base = ext + 5;
558 return; /* unknown version */
560 for (i = 0; i < n; i++)
561 cb((struct detailed_timing *)(det_base + 18 * i), closure);
565 drm_for_each_detailed_block(u8 *raw_edid, detailed_cb *cb, void *closure)
568 struct edid *edid = (struct edid *)raw_edid;
573 for (i = 0; i < EDID_DETAILED_TIMINGS; i++)
574 cb(&(edid->detailed_timings[i]), closure);
576 for (i = 1; i <= raw_edid[0x7e]; i++) {
577 u8 *ext = raw_edid + (i * EDID_LENGTH);
580 cea_for_each_detailed_block(ext, cb, closure);
583 vtb_for_each_detailed_block(ext, cb, closure);
592 is_rb(struct detailed_timing *t, void *data)
595 if (r[3] == EDID_DETAIL_MONITOR_RANGE)
597 *(bool *)data = true;
600 /* EDID 1.4 defines this explicitly. For EDID 1.3, we guess, badly. */
602 drm_monitor_supports_rb(struct edid *edid)
604 if (edid->revision >= 4) {
606 drm_for_each_detailed_block((u8 *)edid, is_rb, &ret);
610 return ((edid->input & DRM_EDID_INPUT_DIGITAL) != 0);
614 find_gtf2(struct detailed_timing *t, void *data)
617 if (r[3] == EDID_DETAIL_MONITOR_RANGE && r[10] == 0x02)
621 /* Secondary GTF curve kicks in above some break frequency */
623 drm_gtf2_hbreak(struct edid *edid)
626 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
627 return r ? (r[12] * 2) : 0;
631 drm_gtf2_2c(struct edid *edid)
634 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
635 return r ? r[13] : 0;
639 drm_gtf2_m(struct edid *edid)
642 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
643 return r ? (r[15] << 8) + r[14] : 0;
647 drm_gtf2_k(struct edid *edid)
650 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
651 return r ? r[16] : 0;
655 drm_gtf2_2j(struct edid *edid)
658 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
659 return r ? r[17] : 0;
663 * standard_timing_level - get std. timing level(CVT/GTF/DMT)
664 * @edid: EDID block to scan
666 static int standard_timing_level(struct edid *edid)
668 if (edid->revision >= 2) {
669 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF))
671 if (drm_gtf2_hbreak(edid))
679 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old
680 * monitors fill with ascii space (0x20) instead.
683 bad_std_timing(u8 a, u8 b)
685 return (a == 0x00 && b == 0x00) ||
686 (a == 0x01 && b == 0x01) ||
687 (a == 0x20 && b == 0x20);
691 * drm_mode_std - convert standard mode info (width, height, refresh) into mode
692 * @t: standard timing params
693 * @timing_level: standard timing level
695 * Take the standard timing params (in this case width, aspect, and refresh)
696 * and convert them into a real mode using CVT/GTF/DMT.
698 static struct drm_display_mode *
699 drm_mode_std(struct drm_connector *connector, struct edid *edid,
700 struct std_timing *t, int revision)
702 struct drm_device *dev = connector->dev;
703 struct drm_display_mode *m, *mode = NULL;
706 unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK)
707 >> EDID_TIMING_ASPECT_SHIFT;
708 unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK)
709 >> EDID_TIMING_VFREQ_SHIFT;
710 int timing_level = standard_timing_level(edid);
712 if (bad_std_timing(t->hsize, t->vfreq_aspect))
715 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */
716 hsize = t->hsize * 8 + 248;
717 /* vrefresh_rate = vfreq + 60 */
718 vrefresh_rate = vfreq + 60;
719 /* the vdisplay is calculated based on the aspect ratio */
720 if (aspect_ratio == 0) {
724 vsize = (hsize * 10) / 16;
725 } else if (aspect_ratio == 1)
726 vsize = (hsize * 3) / 4;
727 else if (aspect_ratio == 2)
728 vsize = (hsize * 4) / 5;
730 vsize = (hsize * 9) / 16;
732 /* HDTV hack, part 1 */
733 if (vrefresh_rate == 60 &&
734 ((hsize == 1360 && vsize == 765) ||
735 (hsize == 1368 && vsize == 769))) {
741 * If this connector already has a mode for this size and refresh
742 * rate (because it came from detailed or CVT info), use that
743 * instead. This way we don't have to guess at interlace or
746 list_for_each_entry(m, &connector->probed_modes, head)
747 if (m->hdisplay == hsize && m->vdisplay == vsize &&
748 drm_mode_vrefresh(m) == vrefresh_rate)
751 /* HDTV hack, part 2 */
752 if (hsize == 1366 && vsize == 768 && vrefresh_rate == 60) {
753 mode = drm_cvt_mode(dev, 1366, 768, vrefresh_rate, 0, 0,
755 mode->hdisplay = 1366;
756 mode->hsync_start = mode->hsync_start - 1;
757 mode->hsync_end = mode->hsync_end - 1;
761 /* check whether it can be found in default mode table */
762 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate);
766 switch (timing_level) {
770 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
774 * This is potentially wrong if there's ever a monitor with
775 * more than one ranges section, each claiming a different
776 * secondary GTF curve. Please don't do that.
778 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
779 if (drm_mode_hsync(mode) > drm_gtf2_hbreak(edid)) {
780 drm_free(mode, DRM_MEM_KMS);
781 mode = drm_gtf_mode_complex(dev, hsize, vsize,
790 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
798 * EDID is delightfully ambiguous about how interlaced modes are to be
799 * encoded. Our internal representation is of frame height, but some
800 * HDTV detailed timings are encoded as field height.
802 * The format list here is from CEA, in frame size. Technically we
803 * should be checking refresh rate too. Whatever.
806 drm_mode_do_interlace_quirk(struct drm_display_mode *mode,
807 struct detailed_pixel_timing *pt)
810 static const struct {
812 } cea_interlaced[] = {
822 if (!(pt->misc & DRM_EDID_PT_INTERLACED))
825 for (i = 0; i < DRM_ARRAY_SIZE(cea_interlaced); i++) {
826 if ((mode->hdisplay == cea_interlaced[i].w) &&
827 (mode->vdisplay == cea_interlaced[i].h / 2)) {
829 mode->vsync_start *= 2;
830 mode->vsync_end *= 2;
836 mode->flags |= DRM_MODE_FLAG_INTERLACE;
840 * drm_mode_detailed - create a new mode from an EDID detailed timing section
841 * @dev: DRM device (needed to create new mode)
843 * @timing: EDID detailed timing info
844 * @quirks: quirks to apply
846 * An EDID detailed timing block contains enough info for us to create and
847 * return a new struct drm_display_mode.
849 static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
851 struct detailed_timing *timing,
854 struct drm_display_mode *mode;
855 struct detailed_pixel_timing *pt = &timing->data.pixel_data;
856 unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo;
857 unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo;
858 unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo;
859 unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo;
860 unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo;
861 unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo;
862 unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4;
863 unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf);
865 /* ignore tiny modes */
866 if (hactive < 64 || vactive < 64)
869 if (pt->misc & DRM_EDID_PT_STEREO) {
870 kprintf("stereo mode not supported\n");
873 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) {
874 kprintf("composite sync not supported\n");
877 /* it is incorrect if hsync/vsync width is zero */
878 if (!hsync_pulse_width || !vsync_pulse_width) {
879 DRM_DEBUG_KMS("Incorrect Detailed timing. "
880 "Wrong Hsync/Vsync pulse width\n");
883 mode = drm_mode_create(dev);
887 mode->type = DRM_MODE_TYPE_DRIVER;
889 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
890 timing->pixel_clock = htole16(1088);
892 mode->clock = le16toh(timing->pixel_clock) * 10;
894 mode->hdisplay = hactive;
895 mode->hsync_start = mode->hdisplay + hsync_offset;
896 mode->hsync_end = mode->hsync_start + hsync_pulse_width;
897 mode->htotal = mode->hdisplay + hblank;
899 mode->vdisplay = vactive;
900 mode->vsync_start = mode->vdisplay + vsync_offset;
901 mode->vsync_end = mode->vsync_start + vsync_pulse_width;
902 mode->vtotal = mode->vdisplay + vblank;
904 /* Some EDIDs have bogus h/vtotal values */
905 if (mode->hsync_end > mode->htotal)
906 mode->htotal = mode->hsync_end + 1;
907 if (mode->vsync_end > mode->vtotal)
908 mode->vtotal = mode->vsync_end + 1;
910 drm_mode_do_interlace_quirk(mode, pt);
912 drm_mode_set_name(mode);
914 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
915 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;
918 mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ?
919 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
920 mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ?
921 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
923 mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4;
924 mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8;
926 if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
927 mode->width_mm *= 10;
928 mode->height_mm *= 10;
931 if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) {
932 mode->width_mm = edid->width_cm * 10;
933 mode->height_mm = edid->height_cm * 10;
940 mode_is_rb(const struct drm_display_mode *mode)
942 return (mode->htotal - mode->hdisplay == 160) &&
943 (mode->hsync_end - mode->hdisplay == 80) &&
944 (mode->hsync_end - mode->hsync_start == 32) &&
945 (mode->vsync_start - mode->vdisplay == 3);
949 mode_in_hsync_range(struct drm_display_mode *mode,
950 struct edid *edid, u8 *t)
952 int hsync, hmin, hmax;
955 if (edid->revision >= 4)
956 hmin += ((t[4] & 0x04) ? 255 : 0);
958 if (edid->revision >= 4)
959 hmax += ((t[4] & 0x08) ? 255 : 0);
960 hsync = drm_mode_hsync(mode);
962 return (hsync <= hmax && hsync >= hmin);
966 mode_in_vsync_range(struct drm_display_mode *mode,
967 struct edid *edid, u8 *t)
969 int vsync, vmin, vmax;
972 if (edid->revision >= 4)
973 vmin += ((t[4] & 0x01) ? 255 : 0);
975 if (edid->revision >= 4)
976 vmax += ((t[4] & 0x02) ? 255 : 0);
977 vsync = drm_mode_vrefresh(mode);
979 return (vsync <= vmax && vsync >= vmin);
983 range_pixel_clock(struct edid *edid, u8 *t)
986 if (t[9] == 0 || t[9] == 255)
989 /* 1.4 with CVT support gives us real precision, yay */
990 if (edid->revision >= 4 && t[10] == 0x04)
991 return (t[9] * 10000) - ((t[12] >> 2) * 250);
993 /* 1.3 is pathetic, so fuzz up a bit */
994 return t[9] * 10000 + 5001;
998 mode_in_range(struct drm_display_mode *mode, struct edid *edid,
999 struct detailed_timing *timing)
1002 u8 *t = (u8 *)timing;
1004 if (!mode_in_hsync_range(mode, edid, t))
1007 if (!mode_in_vsync_range(mode, edid, t))
1010 if ((max_clock = range_pixel_clock(edid, t)))
1011 if (mode->clock > max_clock)
1014 /* 1.4 max horizontal check */
1015 if (edid->revision >= 4 && t[10] == 0x04)
1016 if (t[13] && mode->hdisplay > 8 * (t[13] + (256 * (t[12]&0x3))))
1019 if (mode_is_rb(mode) && !drm_monitor_supports_rb(edid))
1026 * XXX If drm_dmt_modes ever regrows the CVT-R modes (and it will) this will
1027 * need to account for them.
1030 drm_gtf_modes_for_range(struct drm_connector *connector, struct edid *edid,
1031 struct detailed_timing *timing)
1034 struct drm_display_mode *newmode;
1035 struct drm_device *dev = connector->dev;
1037 for (i = 0; i < drm_num_dmt_modes; i++) {
1038 if (mode_in_range(drm_dmt_modes + i, edid, timing)) {
1039 newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]);
1041 drm_mode_probed_add(connector, newmode);
1051 do_inferred_modes(struct detailed_timing *timing, void *c)
1053 struct detailed_mode_closure *closure = c;
1054 struct detailed_non_pixel *data = &timing->data.other_data;
1055 int gtf = (closure->edid->features & DRM_EDID_FEATURE_DEFAULT_GTF);
1057 if (gtf && data->type == EDID_DETAIL_MONITOR_RANGE)
1058 closure->modes += drm_gtf_modes_for_range(closure->connector,
1064 add_inferred_modes(struct drm_connector *connector, struct edid *edid)
1066 struct detailed_mode_closure closure = {
1067 connector, edid, 0, 0, 0
1070 if (version_greater(edid, 1, 0))
1071 drm_for_each_detailed_block((u8 *)edid, do_inferred_modes,
1074 return closure.modes;
1078 drm_est3_modes(struct drm_connector *connector, struct detailed_timing *timing)
1080 int i, j, m, modes = 0;
1081 struct drm_display_mode *mode;
1082 u8 *est = ((u8 *)timing) + 5;
1084 for (i = 0; i < 6; i++) {
1085 for (j = 7; j > 0; j--) {
1086 m = (i * 8) + (7 - j);
1087 if (m >= DRM_ARRAY_SIZE(est3_modes))
1089 if (est[i] & (1 << j)) {
1090 mode = drm_mode_find_dmt(connector->dev,
1094 /*, est3_modes[m].rb */);
1096 drm_mode_probed_add(connector, mode);
1107 do_established_modes(struct detailed_timing *timing, void *c)
1109 struct detailed_mode_closure *closure = c;
1110 struct detailed_non_pixel *data = &timing->data.other_data;
1112 if (data->type == EDID_DETAIL_EST_TIMINGS)
1113 closure->modes += drm_est3_modes(closure->connector, timing);
1117 * add_established_modes - get est. modes from EDID and add them
1118 * @edid: EDID block to scan
1120 * Each EDID block contains a bitmap of the supported "established modes" list
1121 * (defined above). Tease them out and add them to the global modes list.
1124 add_established_modes(struct drm_connector *connector, struct edid *edid)
1126 struct drm_device *dev = connector->dev;
1127 unsigned long est_bits = edid->established_timings.t1 |
1128 (edid->established_timings.t2 << 8) |
1129 ((edid->established_timings.mfg_rsvd & 0x80) << 9);
1131 struct detailed_mode_closure closure = {
1132 connector, edid, 0, 0, 0
1135 for (i = 0; i <= EDID_EST_TIMINGS; i++) {
1136 if (est_bits & (1<<i)) {
1137 struct drm_display_mode *newmode;
1138 newmode = drm_mode_duplicate(dev, &edid_est_modes[i]);
1140 drm_mode_probed_add(connector, newmode);
1146 if (version_greater(edid, 1, 0))
1147 drm_for_each_detailed_block((u8 *)edid,
1148 do_established_modes, &closure);
1150 return modes + closure.modes;
1154 do_standard_modes(struct detailed_timing *timing, void *c)
1156 struct detailed_mode_closure *closure = c;
1157 struct detailed_non_pixel *data = &timing->data.other_data;
1158 struct drm_connector *connector = closure->connector;
1159 struct edid *edid = closure->edid;
1161 if (data->type == EDID_DETAIL_STD_MODES) {
1163 for (i = 0; i < 6; i++) {
1164 struct std_timing *std;
1165 struct drm_display_mode *newmode;
1167 std = &data->data.timings[i];
1168 newmode = drm_mode_std(connector, edid, std,
1171 drm_mode_probed_add(connector, newmode);
1179 * add_standard_modes - get std. modes from EDID and add them
1180 * @edid: EDID block to scan
1182 * Standard modes can be calculated using the appropriate standard (DMT,
1183 * GTF or CVT. Grab them from @edid and add them to the list.
1186 add_standard_modes(struct drm_connector *connector, struct edid *edid)
1189 struct detailed_mode_closure closure = {
1190 connector, edid, 0, 0, 0
1193 for (i = 0; i < EDID_STD_TIMINGS; i++) {
1194 struct drm_display_mode *newmode;
1196 newmode = drm_mode_std(connector, edid,
1197 &edid->standard_timings[i],
1200 drm_mode_probed_add(connector, newmode);
1205 if (version_greater(edid, 1, 0))
1206 drm_for_each_detailed_block((u8 *)edid, do_standard_modes,
1209 /* XXX should also look for standard codes in VTB blocks */
1211 return modes + closure.modes;
1214 static int drm_cvt_modes(struct drm_connector *connector,
1215 struct detailed_timing *timing)
1217 int i, j, modes = 0;
1218 struct drm_display_mode *newmode;
1219 struct drm_device *dev = connector->dev;
1220 struct cvt_timing *cvt;
1221 const int rates[] = { 60, 85, 75, 60, 50 };
1222 const u8 empty[3] = { 0, 0, 0 };
1224 for (i = 0; i < 4; i++) {
1225 int width = 0, height;
1226 cvt = &(timing->data.other_data.data.cvt[i]);
1228 if (!memcmp(cvt->code, empty, 3))
1231 height = (cvt->code[0] + ((cvt->code[1] & 0xf0) << 4) + 1) * 2;
1232 switch (cvt->code[1] & 0x0c) {
1234 width = height * 4 / 3;
1237 width = height * 16 / 9;
1240 width = height * 16 / 10;
1243 width = height * 15 / 9;
1247 for (j = 1; j < 5; j++) {
1248 if (cvt->code[2] & (1 << j)) {
1249 newmode = drm_cvt_mode(dev, width, height,
1253 drm_mode_probed_add(connector, newmode);
1264 do_cvt_mode(struct detailed_timing *timing, void *c)
1266 struct detailed_mode_closure *closure = c;
1267 struct detailed_non_pixel *data = &timing->data.other_data;
1269 if (data->type == EDID_DETAIL_CVT_3BYTE)
1270 closure->modes += drm_cvt_modes(closure->connector, timing);
1274 add_cvt_modes(struct drm_connector *connector, struct edid *edid)
1276 struct detailed_mode_closure closure = {
1277 connector, edid, 0, 0, 0
1280 if (version_greater(edid, 1, 2))
1281 drm_for_each_detailed_block((u8 *)edid, do_cvt_mode, &closure);
1283 /* XXX should also look for CVT codes in VTB blocks */
1285 return closure.modes;
1289 do_detailed_mode(struct detailed_timing *timing, void *c)
1291 struct detailed_mode_closure *closure = c;
1292 struct drm_display_mode *newmode;
1294 if (timing->pixel_clock) {
1295 newmode = drm_mode_detailed(closure->connector->dev,
1296 closure->edid, timing,
1301 if (closure->preferred)
1302 newmode->type |= DRM_MODE_TYPE_PREFERRED;
1304 drm_mode_probed_add(closure->connector, newmode);
1306 closure->preferred = 0;
1311 * add_detailed_modes - Add modes from detailed timings
1312 * @connector: attached connector
1313 * @edid: EDID block to scan
1314 * @quirks: quirks to apply
1317 add_detailed_modes(struct drm_connector *connector, struct edid *edid,
1320 struct detailed_mode_closure closure = {
1328 if (closure.preferred && !version_greater(edid, 1, 3))
1330 (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING);
1332 drm_for_each_detailed_block((u8 *)edid, do_detailed_mode, &closure);
1334 return closure.modes;
1337 #define HDMI_IDENTIFIER 0x000C03
1338 #define AUDIO_BLOCK 0x01
1339 #define VENDOR_BLOCK 0x03
1340 #define SPEAKER_BLOCK 0x04
1341 #define EDID_BASIC_AUDIO (1 << 6)
1344 * Search EDID for CEA extension block.
1346 u8 *drm_find_cea_extension(struct edid *edid)
1348 u8 *edid_ext = NULL;
1351 /* No EDID or EDID extensions */
1352 if (edid == NULL || edid->extensions == 0)
1355 /* Find CEA extension */
1356 for (i = 0; i < edid->extensions; i++) {
1357 edid_ext = (u8 *)edid + EDID_LENGTH * (i + 1);
1358 if (edid_ext[0] == CEA_EXT)
1362 if (i == edid->extensions)
1369 parse_hdmi_vsdb(struct drm_connector *connector, uint8_t *db)
1371 connector->eld[5] |= (db[6] >> 7) << 1; /* Supports_AI */
1373 connector->dvi_dual = db[6] & 1;
1374 connector->max_tmds_clock = db[7] * 5;
1376 connector->latency_present[0] = db[8] >> 7;
1377 connector->latency_present[1] = (db[8] >> 6) & 1;
1378 connector->video_latency[0] = db[9];
1379 connector->audio_latency[0] = db[10];
1380 connector->video_latency[1] = db[11];
1381 connector->audio_latency[1] = db[12];
1383 DRM_DEBUG_KMS("HDMI: DVI dual %d, "
1384 "max TMDS clock %d, "
1385 "latency present %d %d, "
1386 "video latency %d %d, "
1387 "audio latency %d %d\n",
1388 connector->dvi_dual,
1389 connector->max_tmds_clock,
1390 (int) connector->latency_present[0],
1391 (int) connector->latency_present[1],
1392 connector->video_latency[0],
1393 connector->video_latency[1],
1394 connector->audio_latency[0],
1395 connector->audio_latency[1]);
1399 monitor_name(struct detailed_timing *t, void *data)
1401 if (t->data.other_data.type == EDID_DETAIL_MONITOR_NAME)
1402 *(u8 **)data = t->data.other_data.data.str.str;
1406 * drm_edid_to_eld - build ELD from EDID
1407 * @connector: connector corresponding to the HDMI/DP sink
1408 * @edid: EDID to parse
1410 * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver.
1411 * Some ELD fields are left to the graphics driver caller:
1416 void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
1418 uint8_t *eld = connector->eld;
1426 memset(eld, 0, sizeof(connector->eld));
1428 cea = drm_find_cea_extension(edid);
1430 DRM_DEBUG_KMS("ELD: no CEA Extension found\n");
1435 drm_for_each_detailed_block((u8 *)edid, monitor_name, &name);
1436 for (mnl = 0; name && mnl < 13; mnl++) {
1437 if (name[mnl] == 0x0a)
1439 eld[20 + mnl] = name[mnl];
1441 eld[4] = (cea[1] << 5) | mnl;
1442 DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20);
1444 eld[0] = 2 << 3; /* ELD version: 2 */
1446 eld[16] = edid->mfg_id[0];
1447 eld[17] = edid->mfg_id[1];
1448 eld[18] = edid->prod_code[0];
1449 eld[19] = edid->prod_code[1];
1451 for (db = cea + 4; db < cea + cea[2]; db += dbl + 1) {
1454 switch ((db[0] & 0xe0) >> 5) {
1455 case AUDIO_BLOCK: /* Audio Data Block, contains SADs */
1456 sad_count = dbl / 3;
1457 memcpy(eld + 20 + mnl, &db[1], dbl);
1459 case SPEAKER_BLOCK: /* Speaker Allocation Data Block */
1463 /* HDMI Vendor-Specific Data Block */
1464 if (db[1] == 0x03 && db[2] == 0x0c && db[3] == 0)
1465 parse_hdmi_vsdb(connector, db);
1471 eld[5] |= sad_count << 4;
1472 eld[2] = (20 + mnl + sad_count * 3 + 3) / 4;
1474 DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", (int)eld[2], sad_count);
1478 * drm_av_sync_delay - HDMI/DP sink audio-video sync delay in millisecond
1479 * @connector: connector associated with the HDMI/DP sink
1480 * @mode: the display mode
1482 int drm_av_sync_delay(struct drm_connector *connector,
1483 struct drm_display_mode *mode)
1485 int i = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
1488 if (!connector->latency_present[0])
1490 if (!connector->latency_present[1])
1493 a = connector->audio_latency[i];
1494 v = connector->video_latency[i];
1497 * HDMI/DP sink doesn't support audio or video?
1499 if (a == 255 || v == 255)
1503 * Convert raw EDID values to millisecond.
1504 * Treat unknown latency as 0ms.
1507 a = min(2 * (a - 1), 500);
1509 v = min(2 * (v - 1), 500);
1511 return max(v - a, 0);
1515 * drm_select_eld - select one ELD from multiple HDMI/DP sinks
1516 * @encoder: the encoder just changed display mode
1517 * @mode: the adjusted display mode
1519 * It's possible for one encoder to be associated with multiple HDMI/DP sinks.
1520 * The policy is now hard coded to simply use the first HDMI/DP sink's ELD.
1522 struct drm_connector *drm_select_eld(struct drm_encoder *encoder,
1523 struct drm_display_mode *mode)
1525 struct drm_connector *connector;
1526 struct drm_device *dev = encoder->dev;
1528 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
1529 if (connector->encoder == encoder && connector->eld[0])
1536 * drm_detect_hdmi_monitor - detect whether monitor is hdmi.
1537 * @edid: monitor EDID information
1539 * Parse the CEA extension according to CEA-861-B.
1540 * Return true if HDMI, false if not or unknown.
1542 bool drm_detect_hdmi_monitor(struct edid *edid)
1546 int start_offset, end_offset;
1547 bool is_hdmi = false;
1549 edid_ext = drm_find_cea_extension(edid);
1553 /* Data block offset in CEA extension block */
1555 end_offset = edid_ext[2];
1558 * Because HDMI identifier is in Vendor Specific Block,
1559 * search it from all data blocks of CEA extension.
1561 for (i = start_offset; i < end_offset;
1562 /* Increased by data block len */
1563 i += ((edid_ext[i] & 0x1f) + 1)) {
1564 /* Find vendor specific block */
1565 if ((edid_ext[i] >> 5) == VENDOR_BLOCK) {
1566 hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) |
1567 edid_ext[i + 3] << 16;
1568 /* Find HDMI identifier */
1569 if (hdmi_id == HDMI_IDENTIFIER)
1580 * drm_detect_monitor_audio - check monitor audio capability
1582 * Monitor should have CEA extension block.
1583 * If monitor has 'basic audio', but no CEA audio blocks, it's 'basic
1584 * audio' only. If there is any audio extension block and supported
1585 * audio format, assume at least 'basic audio' support, even if 'basic
1586 * audio' is not defined in EDID.
1589 bool drm_detect_monitor_audio(struct edid *edid)
1593 bool has_audio = false;
1594 int start_offset, end_offset;
1596 edid_ext = drm_find_cea_extension(edid);
1600 has_audio = ((edid_ext[3] & EDID_BASIC_AUDIO) != 0);
1603 DRM_DEBUG_KMS("Monitor has basic audio support\n");
1607 /* Data block offset in CEA extension block */
1609 end_offset = edid_ext[2];
1611 for (i = start_offset; i < end_offset;
1612 i += ((edid_ext[i] & 0x1f) + 1)) {
1613 if ((edid_ext[i] >> 5) == AUDIO_BLOCK) {
1615 for (j = 1; j < (edid_ext[i] & 0x1f); j += 3)
1616 DRM_DEBUG_KMS("CEA audio format %d\n",
1617 (edid_ext[i + j] >> 3) & 0xf);
1626 * drm_add_display_info - pull display info out if present
1628 * @info: display info (attached to connector)
1630 * Grab any available display info and stuff it into the drm_display_info
1631 * structure that's part of the connector. Useful for tracking bpp and
1634 static void drm_add_display_info(struct edid *edid,
1635 struct drm_display_info *info)
1639 info->width_mm = edid->width_cm * 10;
1640 info->height_mm = edid->height_cm * 10;
1642 /* driver figures it out in this case */
1644 info->color_formats = 0;
1646 /* Only defined for 1.4 with digital displays */
1647 if (edid->revision < 4)
1650 if (!(edid->input & DRM_EDID_INPUT_DIGITAL))
1653 switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) {
1654 case DRM_EDID_DIGITAL_DEPTH_6:
1657 case DRM_EDID_DIGITAL_DEPTH_8:
1660 case DRM_EDID_DIGITAL_DEPTH_10:
1663 case DRM_EDID_DIGITAL_DEPTH_12:
1666 case DRM_EDID_DIGITAL_DEPTH_14:
1669 case DRM_EDID_DIGITAL_DEPTH_16:
1672 case DRM_EDID_DIGITAL_DEPTH_UNDEF:
1678 info->color_formats = DRM_COLOR_FORMAT_RGB444;
1679 if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB444)
1680 info->color_formats = DRM_COLOR_FORMAT_YCRCB444;
1681 if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB422)
1682 info->color_formats = DRM_COLOR_FORMAT_YCRCB422;
1684 /* Get data from CEA blocks if present */
1685 edid_ext = drm_find_cea_extension(edid);
1689 info->cea_rev = edid_ext[1];
1693 * drm_add_edid_modes - add modes from EDID data, if available
1694 * @connector: connector we're probing
1697 * Add the specified modes to the connector's mode list.
1699 * Return number of modes added or 0 if we couldn't find any.
1701 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
1709 if (!drm_edid_is_valid(edid)) {
1710 device_printf(connector->dev->dev, "%s: EDID invalid.\n",
1711 drm_get_connector_name(connector));
1715 quirks = edid_get_quirks(edid);
1718 * EDID spec says modes should be preferred in this order:
1719 * - preferred detailed mode
1720 * - other detailed modes from base block
1721 * - detailed modes from extension blocks
1722 * - CVT 3-byte code modes
1723 * - standard timing codes
1724 * - established timing codes
1725 * - modes inferred from GTF or CVT range information
1727 * We get this pretty much right.
1729 * XXX order for additional mode types in extension blocks?
1731 num_modes += add_detailed_modes(connector, edid, quirks);
1732 num_modes += add_cvt_modes(connector, edid);
1733 num_modes += add_standard_modes(connector, edid);
1734 num_modes += add_established_modes(connector, edid);
1735 num_modes += add_inferred_modes(connector, edid);
1737 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
1738 edid_fixup_preferred(connector, quirks);
1740 drm_add_display_info(edid, &connector->display_info);
1746 * drm_add_modes_noedid - add modes for the connectors without EDID
1747 * @connector: connector we're probing
1748 * @hdisplay: the horizontal display limit
1749 * @vdisplay: the vertical display limit
1751 * Add the specified modes to the connector's mode list. Only when the
1752 * hdisplay/vdisplay is not beyond the given limit, it will be added.
1754 * Return number of modes added or 0 if we couldn't find any.
1756 int drm_add_modes_noedid(struct drm_connector *connector,
1757 int hdisplay, int vdisplay)
1759 int i, count, num_modes = 0;
1760 struct drm_display_mode *mode;
1761 struct drm_device *dev = connector->dev;
1763 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
1769 for (i = 0; i < count; i++) {
1770 struct drm_display_mode *ptr = &drm_dmt_modes[i];
1771 if (hdisplay && vdisplay) {
1773 * Only when two are valid, they will be used to check
1774 * whether the mode should be added to the mode list of
1777 if (ptr->hdisplay > hdisplay ||
1778 ptr->vdisplay > vdisplay)
1781 if (drm_mode_vrefresh(ptr) > 61)
1783 mode = drm_mode_duplicate(dev, ptr);
1785 drm_mode_probed_add(connector, mode);