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/export.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);
154 * Sanity check the EDID block (base or extension). Return 0 if the block
155 * doesn't check out, or 1 if it's valid.
158 drm_edid_block_valid(u8 *raw_edid)
162 struct edid *edid = (struct edid *)raw_edid;
164 if (raw_edid[0] == 0x00) {
165 int score = drm_edid_header_is_valid(raw_edid);
167 else if (score >= 6) {
168 DRM_DEBUG("Fixing EDID header, your hardware may be failing\n");
169 memcpy(raw_edid, edid_header, sizeof(edid_header));
175 for (i = 0; i < EDID_LENGTH; i++)
178 DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum);
180 /* allow CEA to slide through, switches mangle this */
181 if (raw_edid[0] != 0x02)
185 /* per-block-type checks */
186 switch (raw_edid[0]) {
188 if (edid->version != 1) {
189 DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
193 if (edid->revision > 4)
194 DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n");
205 printk(KERN_ERR "Raw EDID:\n");
206 print_hex_dump(KERN_ERR, " \t", DUMP_PREFIX_NONE, 16, 1,
207 raw_edid, EDID_LENGTH, false);
213 * drm_edid_is_valid - sanity check EDID data
216 * Sanity-check an entire EDID record (including extensions)
218 bool drm_edid_is_valid(struct edid *edid)
221 u8 *raw = (u8 *)edid;
226 for (i = 0; i <= edid->extensions; i++)
227 if (!drm_edid_block_valid(raw + i * EDID_LENGTH))
232 EXPORT_SYMBOL(drm_edid_is_valid);
234 #define DDC_ADDR 0x50
235 #define DDC_SEGMENT_ADDR 0x30
237 * Get EDID information via I2C.
239 * \param adapter : i2c device adaptor
240 * \param buf : EDID data buffer to be filled
241 * \param len : EDID data buffer length
242 * \return 0 on success or -1 on failure.
244 * Try to fetch EDID information by calling i2c driver function.
247 drm_do_probe_ddc_edid(struct i2c_adapter *adapter, unsigned char *buf,
250 unsigned char start = block * EDID_LENGTH;
251 int ret, retries = 5;
253 /* The core i2c driver will automatically retry the transfer if the
254 * adapter reports EAGAIN. However, we find that bit-banging transfers
255 * are susceptible to errors under a heavily loaded machine and
256 * generate spurious NAKs and timeouts. Retrying the transfer
257 * of the individual block a few times seems to overcome this.
260 struct i2c_msg msgs[] = {
273 ret = i2c_transfer(adapter, msgs, 2);
275 DRM_DEBUG_KMS("drm: skipping non-existent adapter %s\n",
279 } while (ret != 2 && --retries);
281 return ret == 2 ? 0 : -1;
284 static bool drm_edid_is_zero(u8 *in_edid, int length)
287 u32 *raw_edid = (u32 *)in_edid;
289 for (i = 0; i < length / 4; i++)
290 if (*(raw_edid + i) != 0)
296 drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter)
298 int i, j = 0, valid_extensions = 0;
301 if ((block = kmalloc(EDID_LENGTH, GFP_KERNEL)) == NULL)
304 /* base block fetch */
305 for (i = 0; i < 4; i++) {
306 if (drm_do_probe_ddc_edid(adapter, block, 0, EDID_LENGTH))
308 if (drm_edid_block_valid(block))
310 if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) {
311 connector->null_edid_counter++;
318 /* if there's no extensions, we're done */
319 if (block[0x7e] == 0)
322 new = krealloc(block, (block[0x7e] + 1) * EDID_LENGTH, GFP_KERNEL);
327 for (j = 1; j <= block[0x7e]; j++) {
328 for (i = 0; i < 4; i++) {
329 if (drm_do_probe_ddc_edid(adapter,
330 block + (valid_extensions + 1) * EDID_LENGTH,
333 if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH)) {
339 dev_warn(connector->dev->dev,
340 "%s: Ignoring invalid EDID block %d.\n",
341 drm_get_connector_name(connector), j);
344 if (valid_extensions != block[0x7e]) {
345 block[EDID_LENGTH-1] += block[0x7e] - valid_extensions;
346 block[0x7e] = valid_extensions;
347 new = krealloc(block, (valid_extensions + 1) * EDID_LENGTH, GFP_KERNEL);
356 dev_warn(connector->dev->dev, "%s: EDID block %d invalid.\n",
357 drm_get_connector_name(connector), j);
365 * Probe DDC presence.
367 * \param adapter : i2c device adaptor
368 * \return 1 on success
371 drm_probe_ddc(struct i2c_adapter *adapter)
375 return (drm_do_probe_ddc_edid(adapter, &out, 0, 1) == 0);
379 * drm_get_edid - get EDID data, if available
380 * @connector: connector we're probing
381 * @adapter: i2c adapter to use for DDC
383 * Poke the given i2c channel to grab EDID data if possible. If found,
384 * attach it to the connector.
386 * Return edid data or NULL if we couldn't find any.
388 struct edid *drm_get_edid(struct drm_connector *connector,
389 struct i2c_adapter *adapter)
391 struct edid *edid = NULL;
393 if (drm_probe_ddc(adapter))
394 edid = (struct edid *)drm_do_get_edid(connector, adapter);
396 connector->display_info.raw_edid = (char *)edid;
401 EXPORT_SYMBOL(drm_get_edid);
403 /*** EDID parsing ***/
406 * edid_vendor - match a string against EDID's obfuscated vendor field
407 * @edid: EDID to match
408 * @vendor: vendor string
410 * Returns true if @vendor is in @edid, false otherwise
412 static bool edid_vendor(struct edid *edid, char *vendor)
416 edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@';
417 edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) |
418 ((edid->mfg_id[1] & 0xe0) >> 5)) + '@';
419 edid_vendor[2] = (edid->mfg_id[1] & 0x1f) + '@';
421 return !strncmp(edid_vendor, vendor, 3);
425 * edid_get_quirks - return quirk flags for a given EDID
426 * @edid: EDID to process
428 * This tells subsequent routines what fixes they need to apply.
430 static u32 edid_get_quirks(struct edid *edid)
432 struct edid_quirk *quirk;
435 for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) {
436 quirk = &edid_quirk_list[i];
438 if (edid_vendor(edid, quirk->vendor) &&
439 (EDID_PRODUCT_ID(edid) == quirk->product_id))
440 return quirk->quirks;
446 #define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
447 #define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
450 * edid_fixup_preferred - set preferred modes based on quirk list
451 * @connector: has mode list to fix up
452 * @quirks: quirks list
454 * Walk the mode list for @connector, clearing the preferred status
455 * on existing modes and setting it anew for the right mode ala @quirks.
457 static void edid_fixup_preferred(struct drm_connector *connector,
460 struct drm_display_mode *t, *cur_mode, *preferred_mode;
461 int target_refresh = 0;
463 if (list_empty(&connector->probed_modes))
466 if (quirks & EDID_QUIRK_PREFER_LARGE_60)
468 if (quirks & EDID_QUIRK_PREFER_LARGE_75)
471 preferred_mode = list_first_entry(&connector->probed_modes,
472 struct drm_display_mode, head);
474 list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) {
475 cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED;
477 if (cur_mode == preferred_mode)
480 /* Largest mode is preferred */
481 if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
482 preferred_mode = cur_mode;
484 /* At a given size, try to get closest to target refresh */
485 if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) &&
486 MODE_REFRESH_DIFF(cur_mode, target_refresh) <
487 MODE_REFRESH_DIFF(preferred_mode, target_refresh)) {
488 preferred_mode = cur_mode;
492 preferred_mode->type |= DRM_MODE_TYPE_PREFERRED;
495 struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
496 int hsize, int vsize, int fresh)
498 struct drm_display_mode *mode = NULL;
501 for (i = 0; i < drm_num_dmt_modes; i++) {
502 const struct drm_display_mode *ptr = &drm_dmt_modes[i];
503 if (hsize == ptr->hdisplay &&
504 vsize == ptr->vdisplay &&
505 fresh == drm_mode_vrefresh(ptr)) {
506 /* get the expected default mode */
507 mode = drm_mode_duplicate(dev, ptr);
513 EXPORT_SYMBOL(drm_mode_find_dmt);
515 typedef void detailed_cb(struct detailed_timing *timing, void *closure);
518 cea_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
521 u8 rev = ext[0x01], d = ext[0x02];
522 u8 *det_base = ext + d;
529 /* have to infer how many blocks we have, check pixel clock */
530 for (i = 0; i < 6; i++)
531 if (det_base[18*i] || det_base[18*i+1])
536 n = min(ext[0x03] & 0x0f, 6);
540 for (i = 0; i < n; i++)
541 cb((struct detailed_timing *)(det_base + 18 * i), closure);
545 vtb_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure)
547 unsigned int i, n = min((int)ext[0x02], 6);
548 u8 *det_base = ext + 5;
551 return; /* unknown version */
553 for (i = 0; i < n; i++)
554 cb((struct detailed_timing *)(det_base + 18 * i), closure);
558 drm_for_each_detailed_block(u8 *raw_edid, detailed_cb *cb, void *closure)
561 struct edid *edid = (struct edid *)raw_edid;
566 for (i = 0; i < EDID_DETAILED_TIMINGS; i++)
567 cb(&(edid->detailed_timings[i]), closure);
569 for (i = 1; i <= raw_edid[0x7e]; i++) {
570 u8 *ext = raw_edid + (i * EDID_LENGTH);
573 cea_for_each_detailed_block(ext, cb, closure);
576 vtb_for_each_detailed_block(ext, cb, closure);
585 is_rb(struct detailed_timing *t, void *data)
588 if (r[3] == EDID_DETAIL_MONITOR_RANGE)
590 *(bool *)data = true;
593 /* EDID 1.4 defines this explicitly. For EDID 1.3, we guess, badly. */
595 drm_monitor_supports_rb(struct edid *edid)
597 if (edid->revision >= 4) {
599 drm_for_each_detailed_block((u8 *)edid, is_rb, &ret);
603 return ((edid->input & DRM_EDID_INPUT_DIGITAL) != 0);
607 find_gtf2(struct detailed_timing *t, void *data)
610 if (r[3] == EDID_DETAIL_MONITOR_RANGE && r[10] == 0x02)
614 /* Secondary GTF curve kicks in above some break frequency */
616 drm_gtf2_hbreak(struct edid *edid)
619 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
620 return r ? (r[12] * 2) : 0;
624 drm_gtf2_2c(struct edid *edid)
627 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
628 return r ? r[13] : 0;
632 drm_gtf2_m(struct edid *edid)
635 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
636 return r ? (r[15] << 8) + r[14] : 0;
640 drm_gtf2_k(struct edid *edid)
643 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
644 return r ? r[16] : 0;
648 drm_gtf2_2j(struct edid *edid)
651 drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r);
652 return r ? r[17] : 0;
656 * standard_timing_level - get std. timing level(CVT/GTF/DMT)
657 * @edid: EDID block to scan
659 static int standard_timing_level(struct edid *edid)
661 if (edid->revision >= 2) {
662 if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF))
664 if (drm_gtf2_hbreak(edid))
672 * 0 is reserved. The spec says 0x01 fill for unused timings. Some old
673 * monitors fill with ascii space (0x20) instead.
676 bad_std_timing(u8 a, u8 b)
678 return (a == 0x00 && b == 0x00) ||
679 (a == 0x01 && b == 0x01) ||
680 (a == 0x20 && b == 0x20);
684 * drm_mode_std - convert standard mode info (width, height, refresh) into mode
685 * @t: standard timing params
686 * @timing_level: standard timing level
688 * Take the standard timing params (in this case width, aspect, and refresh)
689 * and convert them into a real mode using CVT/GTF/DMT.
691 static struct drm_display_mode *
692 drm_mode_std(struct drm_connector *connector, struct edid *edid,
693 struct std_timing *t, int revision)
695 struct drm_device *dev = connector->dev;
696 struct drm_display_mode *m, *mode = NULL;
699 unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK)
700 >> EDID_TIMING_ASPECT_SHIFT;
701 unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK)
702 >> EDID_TIMING_VFREQ_SHIFT;
703 int timing_level = standard_timing_level(edid);
705 if (bad_std_timing(t->hsize, t->vfreq_aspect))
708 /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */
709 hsize = t->hsize * 8 + 248;
710 /* vrefresh_rate = vfreq + 60 */
711 vrefresh_rate = vfreq + 60;
712 /* the vdisplay is calculated based on the aspect ratio */
713 if (aspect_ratio == 0) {
717 vsize = (hsize * 10) / 16;
718 } else if (aspect_ratio == 1)
719 vsize = (hsize * 3) / 4;
720 else if (aspect_ratio == 2)
721 vsize = (hsize * 4) / 5;
723 vsize = (hsize * 9) / 16;
725 /* HDTV hack, part 1 */
726 if (vrefresh_rate == 60 &&
727 ((hsize == 1360 && vsize == 765) ||
728 (hsize == 1368 && vsize == 769))) {
734 * If this connector already has a mode for this size and refresh
735 * rate (because it came from detailed or CVT info), use that
736 * instead. This way we don't have to guess at interlace or
739 list_for_each_entry(m, &connector->probed_modes, head)
740 if (m->hdisplay == hsize && m->vdisplay == vsize &&
741 drm_mode_vrefresh(m) == vrefresh_rate)
744 /* HDTV hack, part 2 */
745 if (hsize == 1366 && vsize == 768 && vrefresh_rate == 60) {
746 mode = drm_cvt_mode(dev, 1366, 768, vrefresh_rate, 0, 0,
748 mode->hdisplay = 1366;
749 mode->hsync_start = mode->hsync_start - 1;
750 mode->hsync_end = mode->hsync_end - 1;
754 /* check whether it can be found in default mode table */
755 mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate);
759 switch (timing_level) {
763 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
767 * This is potentially wrong if there's ever a monitor with
768 * more than one ranges section, each claiming a different
769 * secondary GTF curve. Please don't do that.
771 mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0);
772 if (drm_mode_hsync(mode) > drm_gtf2_hbreak(edid)) {
774 mode = drm_gtf_mode_complex(dev, hsize, vsize,
783 mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0,
791 * EDID is delightfully ambiguous about how interlaced modes are to be
792 * encoded. Our internal representation is of frame height, but some
793 * HDTV detailed timings are encoded as field height.
795 * The format list here is from CEA, in frame size. Technically we
796 * should be checking refresh rate too. Whatever.
799 drm_mode_do_interlace_quirk(struct drm_display_mode *mode,
800 struct detailed_pixel_timing *pt)
803 static const struct {
805 } cea_interlaced[] = {
815 if (!(pt->misc & DRM_EDID_PT_INTERLACED))
818 for (i = 0; i < ARRAY_SIZE(cea_interlaced); i++) {
819 if ((mode->hdisplay == cea_interlaced[i].w) &&
820 (mode->vdisplay == cea_interlaced[i].h / 2)) {
822 mode->vsync_start *= 2;
823 mode->vsync_end *= 2;
829 mode->flags |= DRM_MODE_FLAG_INTERLACE;
833 * drm_mode_detailed - create a new mode from an EDID detailed timing section
834 * @dev: DRM device (needed to create new mode)
836 * @timing: EDID detailed timing info
837 * @quirks: quirks to apply
839 * An EDID detailed timing block contains enough info for us to create and
840 * return a new struct drm_display_mode.
842 static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
844 struct detailed_timing *timing,
847 struct drm_display_mode *mode;
848 struct detailed_pixel_timing *pt = &timing->data.pixel_data;
849 unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo;
850 unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo;
851 unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo;
852 unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo;
853 unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo;
854 unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo;
855 unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) << 2 | pt->vsync_offset_pulse_width_lo >> 4;
856 unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf);
858 /* ignore tiny modes */
859 if (hactive < 64 || vactive < 64)
862 if (pt->misc & DRM_EDID_PT_STEREO) {
863 printk(KERN_WARNING "stereo mode not supported\n");
866 if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) {
867 printk(KERN_WARNING "composite sync not supported\n");
870 /* it is incorrect if hsync/vsync width is zero */
871 if (!hsync_pulse_width || !vsync_pulse_width) {
872 DRM_DEBUG_KMS("Incorrect Detailed timing. "
873 "Wrong Hsync/Vsync pulse width\n");
877 if (quirks & EDID_QUIRK_FORCE_REDUCED_BLANKING) {
878 mode = drm_cvt_mode(dev, hactive, vactive, 60, true, false, false);
885 mode = drm_mode_create(dev);
889 if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
890 timing->pixel_clock = cpu_to_le16(1088);
892 mode->clock = le16_to_cpu(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 if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
913 pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE;
916 mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ?
917 DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
918 mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ?
919 DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
922 mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4;
923 mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 8;
925 if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
926 mode->width_mm *= 10;
927 mode->height_mm *= 10;
930 if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) {
931 mode->width_mm = edid->width_cm * 10;
932 mode->height_mm = edid->height_cm * 10;
935 mode->type = DRM_MODE_TYPE_DRIVER;
936 drm_mode_set_name(mode);
942 mode_is_rb(const struct drm_display_mode *mode)
944 return (mode->htotal - mode->hdisplay == 160) &&
945 (mode->hsync_end - mode->hdisplay == 80) &&
946 (mode->hsync_end - mode->hsync_start == 32) &&
947 (mode->vsync_start - mode->vdisplay == 3);
951 mode_in_hsync_range(const struct drm_display_mode *mode,
952 struct edid *edid, u8 *t)
954 int hsync, hmin, hmax;
957 if (edid->revision >= 4)
958 hmin += ((t[4] & 0x04) ? 255 : 0);
960 if (edid->revision >= 4)
961 hmax += ((t[4] & 0x08) ? 255 : 0);
962 hsync = drm_mode_hsync(mode);
964 return (hsync <= hmax && hsync >= hmin);
968 mode_in_vsync_range(const struct drm_display_mode *mode,
969 struct edid *edid, u8 *t)
971 int vsync, vmin, vmax;
974 if (edid->revision >= 4)
975 vmin += ((t[4] & 0x01) ? 255 : 0);
977 if (edid->revision >= 4)
978 vmax += ((t[4] & 0x02) ? 255 : 0);
979 vsync = drm_mode_vrefresh(mode);
981 return (vsync <= vmax && vsync >= vmin);
985 range_pixel_clock(struct edid *edid, u8 *t)
988 if (t[9] == 0 || t[9] == 255)
991 /* 1.4 with CVT support gives us real precision, yay */
992 if (edid->revision >= 4 && t[10] == 0x04)
993 return (t[9] * 10000) - ((t[12] >> 2) * 250);
995 /* 1.3 is pathetic, so fuzz up a bit */
996 return t[9] * 10000 + 5001;
1000 mode_in_range(const struct drm_display_mode *mode, struct edid *edid,
1001 struct detailed_timing *timing)
1004 u8 *t = (u8 *)timing;
1006 if (!mode_in_hsync_range(mode, edid, t))
1009 if (!mode_in_vsync_range(mode, edid, t))
1012 if ((max_clock = range_pixel_clock(edid, t)))
1013 if (mode->clock > max_clock)
1016 /* 1.4 max horizontal check */
1017 if (edid->revision >= 4 && t[10] == 0x04)
1018 if (t[13] && mode->hdisplay > 8 * (t[13] + (256 * (t[12]&0x3))))
1021 if (mode_is_rb(mode) && !drm_monitor_supports_rb(edid))
1028 * XXX If drm_dmt_modes ever regrows the CVT-R modes (and it will) this will
1029 * need to account for them.
1032 drm_gtf_modes_for_range(struct drm_connector *connector, struct edid *edid,
1033 struct detailed_timing *timing)
1036 struct drm_display_mode *newmode;
1037 struct drm_device *dev = connector->dev;
1039 for (i = 0; i < drm_num_dmt_modes; i++) {
1040 if (mode_in_range(drm_dmt_modes + i, edid, timing)) {
1041 newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]);
1043 drm_mode_probed_add(connector, newmode);
1053 do_inferred_modes(struct detailed_timing *timing, void *c)
1055 struct detailed_mode_closure *closure = c;
1056 struct detailed_non_pixel *data = &timing->data.other_data;
1057 int gtf = (closure->edid->features & DRM_EDID_FEATURE_DEFAULT_GTF);
1059 if (gtf && data->type == EDID_DETAIL_MONITOR_RANGE)
1060 closure->modes += drm_gtf_modes_for_range(closure->connector,
1066 add_inferred_modes(struct drm_connector *connector, struct edid *edid)
1068 struct detailed_mode_closure closure = {
1069 connector, edid, 0, 0, 0
1072 if (version_greater(edid, 1, 0))
1073 drm_for_each_detailed_block((u8 *)edid, do_inferred_modes,
1076 return closure.modes;
1080 drm_est3_modes(struct drm_connector *connector, struct detailed_timing *timing)
1082 int i, j, m, modes = 0;
1083 struct drm_display_mode *mode;
1084 u8 *est = ((u8 *)timing) + 5;
1086 for (i = 0; i < 6; i++) {
1087 for (j = 7; j > 0; j--) {
1088 m = (i * 8) + (7 - j);
1089 if (m >= ARRAY_SIZE(est3_modes))
1091 if (est[i] & (1 << j)) {
1092 mode = drm_mode_find_dmt(connector->dev,
1096 /*, est3_modes[m].rb */);
1098 drm_mode_probed_add(connector, mode);
1109 do_established_modes(struct detailed_timing *timing, void *c)
1111 struct detailed_mode_closure *closure = c;
1112 struct detailed_non_pixel *data = &timing->data.other_data;
1114 if (data->type == EDID_DETAIL_EST_TIMINGS)
1115 closure->modes += drm_est3_modes(closure->connector, timing);
1119 * add_established_modes - get est. modes from EDID and add them
1120 * @edid: EDID block to scan
1122 * Each EDID block contains a bitmap of the supported "established modes" list
1123 * (defined above). Tease them out and add them to the global modes list.
1126 add_established_modes(struct drm_connector *connector, struct edid *edid)
1128 struct drm_device *dev = connector->dev;
1129 unsigned long est_bits = edid->established_timings.t1 |
1130 (edid->established_timings.t2 << 8) |
1131 ((edid->established_timings.mfg_rsvd & 0x80) << 9);
1133 struct detailed_mode_closure closure = {
1134 connector, edid, 0, 0, 0
1137 for (i = 0; i <= EDID_EST_TIMINGS; i++) {
1138 if (est_bits & (1<<i)) {
1139 struct drm_display_mode *newmode;
1140 newmode = drm_mode_duplicate(dev, &edid_est_modes[i]);
1142 drm_mode_probed_add(connector, newmode);
1148 if (version_greater(edid, 1, 0))
1149 drm_for_each_detailed_block((u8 *)edid,
1150 do_established_modes, &closure);
1152 return modes + closure.modes;
1156 do_standard_modes(struct detailed_timing *timing, void *c)
1158 struct detailed_mode_closure *closure = c;
1159 struct detailed_non_pixel *data = &timing->data.other_data;
1160 struct drm_connector *connector = closure->connector;
1161 struct edid *edid = closure->edid;
1163 if (data->type == EDID_DETAIL_STD_MODES) {
1165 for (i = 0; i < 6; i++) {
1166 struct std_timing *std;
1167 struct drm_display_mode *newmode;
1169 std = &data->data.timings[i];
1170 newmode = drm_mode_std(connector, edid, std,
1173 drm_mode_probed_add(connector, newmode);
1181 * add_standard_modes - get std. modes from EDID and add them
1182 * @edid: EDID block to scan
1184 * Standard modes can be calculated using the appropriate standard (DMT,
1185 * GTF or CVT. Grab them from @edid and add them to the list.
1188 add_standard_modes(struct drm_connector *connector, struct edid *edid)
1191 struct detailed_mode_closure closure = {
1192 connector, edid, 0, 0, 0
1195 for (i = 0; i < EDID_STD_TIMINGS; i++) {
1196 struct drm_display_mode *newmode;
1198 newmode = drm_mode_std(connector, edid,
1199 &edid->standard_timings[i],
1202 drm_mode_probed_add(connector, newmode);
1207 if (version_greater(edid, 1, 0))
1208 drm_for_each_detailed_block((u8 *)edid, do_standard_modes,
1211 /* XXX should also look for standard codes in VTB blocks */
1213 return modes + closure.modes;
1216 static int drm_cvt_modes(struct drm_connector *connector,
1217 struct detailed_timing *timing)
1219 int i, j, modes = 0;
1220 struct drm_display_mode *newmode;
1221 struct drm_device *dev = connector->dev;
1222 struct cvt_timing *cvt;
1223 const int rates[] = { 60, 85, 75, 60, 50 };
1224 const u8 empty[3] = { 0, 0, 0 };
1226 for (i = 0; i < 4; i++) {
1227 int uninitialized_var(width), height;
1228 cvt = &(timing->data.other_data.data.cvt[i]);
1230 if (!memcmp(cvt->code, empty, 3))
1233 height = (cvt->code[0] + ((cvt->code[1] & 0xf0) << 4) + 1) * 2;
1234 switch (cvt->code[1] & 0x0c) {
1236 width = height * 4 / 3;
1239 width = height * 16 / 9;
1242 width = height * 16 / 10;
1245 width = height * 15 / 9;
1249 for (j = 1; j < 5; j++) {
1250 if (cvt->code[2] & (1 << j)) {
1251 newmode = drm_cvt_mode(dev, width, height,
1255 drm_mode_probed_add(connector, newmode);
1266 do_cvt_mode(struct detailed_timing *timing, void *c)
1268 struct detailed_mode_closure *closure = c;
1269 struct detailed_non_pixel *data = &timing->data.other_data;
1271 if (data->type == EDID_DETAIL_CVT_3BYTE)
1272 closure->modes += drm_cvt_modes(closure->connector, timing);
1276 add_cvt_modes(struct drm_connector *connector, struct edid *edid)
1278 struct detailed_mode_closure closure = {
1279 connector, edid, 0, 0, 0
1282 if (version_greater(edid, 1, 2))
1283 drm_for_each_detailed_block((u8 *)edid, do_cvt_mode, &closure);
1285 /* XXX should also look for CVT codes in VTB blocks */
1287 return closure.modes;
1291 do_detailed_mode(struct detailed_timing *timing, void *c)
1293 struct detailed_mode_closure *closure = c;
1294 struct drm_display_mode *newmode;
1296 if (timing->pixel_clock) {
1297 newmode = drm_mode_detailed(closure->connector->dev,
1298 closure->edid, timing,
1303 if (closure->preferred)
1304 newmode->type |= DRM_MODE_TYPE_PREFERRED;
1306 drm_mode_probed_add(closure->connector, newmode);
1308 closure->preferred = 0;
1313 * add_detailed_modes - Add modes from detailed timings
1314 * @connector: attached connector
1315 * @edid: EDID block to scan
1316 * @quirks: quirks to apply
1319 add_detailed_modes(struct drm_connector *connector, struct edid *edid,
1322 struct detailed_mode_closure closure = {
1330 if (closure.preferred && !version_greater(edid, 1, 3))
1332 (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING);
1334 drm_for_each_detailed_block((u8 *)edid, do_detailed_mode, &closure);
1336 return closure.modes;
1339 #define HDMI_IDENTIFIER 0x000C03
1340 #define AUDIO_BLOCK 0x01
1341 #define VENDOR_BLOCK 0x03
1342 #define SPEAKER_BLOCK 0x04
1343 #define EDID_BASIC_AUDIO (1 << 6)
1346 * Search EDID for CEA extension block.
1348 u8 *drm_find_cea_extension(struct edid *edid)
1350 u8 *edid_ext = NULL;
1353 /* No EDID or EDID extensions */
1354 if (edid == NULL || edid->extensions == 0)
1357 /* Find CEA extension */
1358 for (i = 0; i < edid->extensions; i++) {
1359 edid_ext = (u8 *)edid + EDID_LENGTH * (i + 1);
1360 if (edid_ext[0] == CEA_EXT)
1364 if (i == edid->extensions)
1369 EXPORT_SYMBOL(drm_find_cea_extension);
1372 parse_hdmi_vsdb(struct drm_connector *connector, uint8_t *db)
1374 connector->eld[5] |= (db[6] >> 7) << 1; /* Supports_AI */
1376 connector->dvi_dual = db[6] & 1;
1377 connector->max_tmds_clock = db[7] * 5;
1379 connector->latency_present[0] = db[8] >> 7;
1380 connector->latency_present[1] = (db[8] >> 6) & 1;
1381 connector->video_latency[0] = db[9];
1382 connector->audio_latency[0] = db[10];
1383 connector->video_latency[1] = db[11];
1384 connector->audio_latency[1] = db[12];
1386 DRM_LOG_KMS("HDMI: DVI dual %d, "
1387 "max TMDS clock %d, "
1388 "latency present %d %d, "
1389 "video latency %d %d, "
1390 "audio latency %d %d\n",
1391 connector->dvi_dual,
1392 connector->max_tmds_clock,
1393 (int) connector->latency_present[0],
1394 (int) connector->latency_present[1],
1395 connector->video_latency[0],
1396 connector->video_latency[1],
1397 connector->audio_latency[0],
1398 connector->audio_latency[1]);
1402 monitor_name(struct detailed_timing *t, void *data)
1404 if (t->data.other_data.type == EDID_DETAIL_MONITOR_NAME)
1405 *(u8 **)data = t->data.other_data.data.str.str;
1409 * drm_edid_to_eld - build ELD from EDID
1410 * @connector: connector corresponding to the HDMI/DP sink
1411 * @edid: EDID to parse
1413 * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver.
1414 * Some ELD fields are left to the graphics driver caller:
1419 void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid)
1421 uint8_t *eld = connector->eld;
1429 memset(eld, 0, sizeof(connector->eld));
1431 cea = drm_find_cea_extension(edid);
1433 DRM_DEBUG_KMS("ELD: no CEA Extension found\n");
1438 drm_for_each_detailed_block((u8 *)edid, monitor_name, &name);
1439 for (mnl = 0; name && mnl < 13; mnl++) {
1440 if (name[mnl] == 0x0a)
1442 eld[20 + mnl] = name[mnl];
1444 eld[4] = (cea[1] << 5) | mnl;
1445 DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20);
1447 eld[0] = 2 << 3; /* ELD version: 2 */
1449 eld[16] = edid->mfg_id[0];
1450 eld[17] = edid->mfg_id[1];
1451 eld[18] = edid->prod_code[0];
1452 eld[19] = edid->prod_code[1];
1454 for (db = cea + 4; db < cea + cea[2]; db += dbl + 1) {
1457 switch ((db[0] & 0xe0) >> 5) {
1458 case AUDIO_BLOCK: /* Audio Data Block, contains SADs */
1459 sad_count = dbl / 3;
1460 memcpy(eld + 20 + mnl, &db[1], dbl);
1462 case SPEAKER_BLOCK: /* Speaker Allocation Data Block */
1466 /* HDMI Vendor-Specific Data Block */
1467 if (db[1] == 0x03 && db[2] == 0x0c && db[3] == 0)
1468 parse_hdmi_vsdb(connector, db);
1474 eld[5] |= sad_count << 4;
1475 eld[2] = (20 + mnl + sad_count * 3 + 3) / 4;
1477 DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", (int)eld[2], sad_count);
1479 EXPORT_SYMBOL(drm_edid_to_eld);
1482 * drm_av_sync_delay - HDMI/DP sink audio-video sync delay in millisecond
1483 * @connector: connector associated with the HDMI/DP sink
1484 * @mode: the display mode
1486 int drm_av_sync_delay(struct drm_connector *connector,
1487 struct drm_display_mode *mode)
1489 int i = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
1492 if (!connector->latency_present[0])
1494 if (!connector->latency_present[1])
1497 a = connector->audio_latency[i];
1498 v = connector->video_latency[i];
1501 * HDMI/DP sink doesn't support audio or video?
1503 if (a == 255 || v == 255)
1507 * Convert raw EDID values to millisecond.
1508 * Treat unknown latency as 0ms.
1511 a = min(2 * (a - 1), 500);
1513 v = min(2 * (v - 1), 500);
1515 return max(v - a, 0);
1517 EXPORT_SYMBOL(drm_av_sync_delay);
1520 * drm_select_eld - select one ELD from multiple HDMI/DP sinks
1521 * @encoder: the encoder just changed display mode
1522 * @mode: the adjusted display mode
1524 * It's possible for one encoder to be associated with multiple HDMI/DP sinks.
1525 * The policy is now hard coded to simply use the first HDMI/DP sink's ELD.
1527 struct drm_connector *drm_select_eld(struct drm_encoder *encoder,
1528 struct drm_display_mode *mode)
1530 struct drm_connector *connector;
1531 struct drm_device *dev = encoder->dev;
1533 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
1534 if (connector->encoder == encoder && connector->eld[0])
1539 EXPORT_SYMBOL(drm_select_eld);
1542 * drm_detect_hdmi_monitor - detect whether monitor is hdmi.
1543 * @edid: monitor EDID information
1545 * Parse the CEA extension according to CEA-861-B.
1546 * Return true if HDMI, false if not or unknown.
1548 bool drm_detect_hdmi_monitor(struct edid *edid)
1552 int start_offset, end_offset;
1553 bool is_hdmi = false;
1555 edid_ext = drm_find_cea_extension(edid);
1559 /* Data block offset in CEA extension block */
1561 end_offset = edid_ext[2];
1564 * Because HDMI identifier is in Vendor Specific Block,
1565 * search it from all data blocks of CEA extension.
1567 for (i = start_offset; i < end_offset;
1568 /* Increased by data block len */
1569 i += ((edid_ext[i] & 0x1f) + 1)) {
1570 /* Find vendor specific block */
1571 if ((edid_ext[i] >> 5) == VENDOR_BLOCK) {
1572 hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) |
1573 edid_ext[i + 3] << 16;
1574 /* Find HDMI identifier */
1575 if (hdmi_id == HDMI_IDENTIFIER)
1584 EXPORT_SYMBOL(drm_detect_hdmi_monitor);
1587 * drm_detect_monitor_audio - check monitor audio capability
1589 * Monitor should have CEA extension block.
1590 * If monitor has 'basic audio', but no CEA audio blocks, it's 'basic
1591 * audio' only. If there is any audio extension block and supported
1592 * audio format, assume at least 'basic audio' support, even if 'basic
1593 * audio' is not defined in EDID.
1596 bool drm_detect_monitor_audio(struct edid *edid)
1600 bool has_audio = false;
1601 int start_offset, end_offset;
1603 edid_ext = drm_find_cea_extension(edid);
1607 has_audio = ((edid_ext[3] & EDID_BASIC_AUDIO) != 0);
1610 DRM_DEBUG_KMS("Monitor has basic audio support\n");
1614 /* Data block offset in CEA extension block */
1616 end_offset = edid_ext[2];
1618 for (i = start_offset; i < end_offset;
1619 i += ((edid_ext[i] & 0x1f) + 1)) {
1620 if ((edid_ext[i] >> 5) == AUDIO_BLOCK) {
1622 for (j = 1; j < (edid_ext[i] & 0x1f); j += 3)
1623 DRM_DEBUG_KMS("CEA audio format %d\n",
1624 (edid_ext[i + j] >> 3) & 0xf);
1631 EXPORT_SYMBOL(drm_detect_monitor_audio);
1634 * drm_add_display_info - pull display info out if present
1636 * @info: display info (attached to connector)
1638 * Grab any available display info and stuff it into the drm_display_info
1639 * structure that's part of the connector. Useful for tracking bpp and
1642 static void drm_add_display_info(struct edid *edid,
1643 struct drm_display_info *info)
1647 info->width_mm = edid->width_cm * 10;
1648 info->height_mm = edid->height_cm * 10;
1650 /* driver figures it out in this case */
1652 info->color_formats = 0;
1654 /* Only defined for 1.4 with digital displays */
1655 if (edid->revision < 4)
1658 if (!(edid->input & DRM_EDID_INPUT_DIGITAL))
1661 switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) {
1662 case DRM_EDID_DIGITAL_DEPTH_6:
1665 case DRM_EDID_DIGITAL_DEPTH_8:
1668 case DRM_EDID_DIGITAL_DEPTH_10:
1671 case DRM_EDID_DIGITAL_DEPTH_12:
1674 case DRM_EDID_DIGITAL_DEPTH_14:
1677 case DRM_EDID_DIGITAL_DEPTH_16:
1680 case DRM_EDID_DIGITAL_DEPTH_UNDEF:
1686 info->color_formats = DRM_COLOR_FORMAT_RGB444;
1687 if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB444)
1688 info->color_formats = DRM_COLOR_FORMAT_YCRCB444;
1689 if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB422)
1690 info->color_formats = DRM_COLOR_FORMAT_YCRCB422;
1692 /* Get data from CEA blocks if present */
1693 edid_ext = drm_find_cea_extension(edid);
1697 info->cea_rev = edid_ext[1];
1701 * drm_add_edid_modes - add modes from EDID data, if available
1702 * @connector: connector we're probing
1705 * Add the specified modes to the connector's mode list.
1707 * Return number of modes added or 0 if we couldn't find any.
1709 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
1717 if (!drm_edid_is_valid(edid)) {
1718 dev_warn(connector->dev->dev, "%s: EDID invalid.\n",
1719 drm_get_connector_name(connector));
1723 quirks = edid_get_quirks(edid);
1726 * EDID spec says modes should be preferred in this order:
1727 * - preferred detailed mode
1728 * - other detailed modes from base block
1729 * - detailed modes from extension blocks
1730 * - CVT 3-byte code modes
1731 * - standard timing codes
1732 * - established timing codes
1733 * - modes inferred from GTF or CVT range information
1735 * We get this pretty much right.
1737 * XXX order for additional mode types in extension blocks?
1739 num_modes += add_detailed_modes(connector, edid, quirks);
1740 num_modes += add_cvt_modes(connector, edid);
1741 num_modes += add_standard_modes(connector, edid);
1742 num_modes += add_established_modes(connector, edid);
1743 if (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF)
1744 num_modes += add_inferred_modes(connector, edid);
1746 if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
1747 edid_fixup_preferred(connector, quirks);
1749 drm_add_display_info(edid, &connector->display_info);
1753 EXPORT_SYMBOL(drm_add_edid_modes);
1756 * drm_add_modes_noedid - add modes for the connectors without EDID
1757 * @connector: connector we're probing
1758 * @hdisplay: the horizontal display limit
1759 * @vdisplay: the vertical display limit
1761 * Add the specified modes to the connector's mode list. Only when the
1762 * hdisplay/vdisplay is not beyond the given limit, it will be added.
1764 * Return number of modes added or 0 if we couldn't find any.
1766 int drm_add_modes_noedid(struct drm_connector *connector,
1767 int hdisplay, int vdisplay)
1769 int i, count, num_modes = 0;
1770 struct drm_display_mode *mode;
1771 struct drm_device *dev = connector->dev;
1773 count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode);
1779 for (i = 0; i < count; i++) {
1780 const struct drm_display_mode *ptr = &drm_dmt_modes[i];
1781 if (hdisplay && vdisplay) {
1783 * Only when two are valid, they will be used to check
1784 * whether the mode should be added to the mode list of
1787 if (ptr->hdisplay > hdisplay ||
1788 ptr->vdisplay > vdisplay)
1791 if (drm_mode_vrefresh(ptr) > 61)
1793 mode = drm_mode_duplicate(dev, ptr);
1795 drm_mode_probed_add(connector, mode);
1801 EXPORT_SYMBOL(drm_add_modes_noedid);