2 * Copyright © 2007-2008 Intel Corporation
3 * Jesse Barnes <jesse.barnes@intel.com>
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 * OTHER DEALINGS IN THE SOFTWARE.
23 #ifndef __DRM_EDID_H__
24 #define __DRM_EDID_H__
26 #include <linux/types.h>
27 #include <linux/hdmi.h>
28 #include <drm/drm_mode.h>
34 #define EDID_LENGTH 128
36 #define DDC_ADDR2 0x52 /* E-DDC 1.2 - where DisplayID can hide */
43 #define DISPLAYID_EXT 0x70
49 } __attribute__((packed));
51 /* 00=16:10, 01=4:3, 10=5:4, 11=16:9 */
52 #define EDID_TIMING_ASPECT_SHIFT 6
53 #define EDID_TIMING_ASPECT_MASK (0x3 << EDID_TIMING_ASPECT_SHIFT)
56 #define EDID_TIMING_VFREQ_SHIFT 0
57 #define EDID_TIMING_VFREQ_MASK (0x3f << EDID_TIMING_VFREQ_SHIFT)
60 u8 hsize; /* need to multiply by 8 then add 248 */
62 } __attribute__((packed));
64 #define DRM_EDID_PT_HSYNC_POSITIVE (1 << 1)
65 #define DRM_EDID_PT_VSYNC_POSITIVE (1 << 2)
66 #define DRM_EDID_PT_SEPARATE_SYNC (3 << 3)
67 #define DRM_EDID_PT_STEREO (1 << 5)
68 #define DRM_EDID_PT_INTERLACED (1 << 7)
70 /* If detailed data is pixel timing */
71 struct detailed_pixel_timing {
79 u8 hsync_pulse_width_lo;
80 u8 vsync_offset_pulse_width_lo;
81 u8 hsync_vsync_offset_pulse_width_hi;
84 u8 width_height_mm_hi;
88 } __attribute__((packed));
90 /* If it's not pixel timing, it'll be one of the below */
91 struct detailed_data_string {
93 } __attribute__((packed));
95 #define DRM_EDID_DEFAULT_GTF_SUPPORT_FLAG 0x00
96 #define DRM_EDID_RANGE_LIMITS_ONLY_FLAG 0x01
97 #define DRM_EDID_SECONDARY_GTF_SUPPORT_FLAG 0x02
98 #define DRM_EDID_CVT_SUPPORT_FLAG 0x04
100 struct detailed_data_monitor_range {
105 u8 pixel_clock_mhz; /* need to multiply by 10 */
110 u8 hfreq_start_khz; /* need to multiply by 2 */
111 u8 c; /* need to divide by 2 */
114 u8 j; /* need to divide by 2 */
115 } __attribute__((packed)) gtf2;
118 u8 data1; /* high 6 bits: extra clock resolution */
119 u8 data2; /* plus low 2 of above: max hactive */
120 u8 supported_aspects;
121 u8 flags; /* preferred aspect and blanking support */
122 u8 supported_scalings;
123 u8 preferred_refresh;
124 } __attribute__((packed)) cvt;
125 } __attribute__((packed)) formula;
126 } __attribute__((packed));
128 struct detailed_data_wpindex {
129 u8 white_yx_lo; /* Lower 2 bits each */
132 u8 gamma; /* need to divide by 100 then add 1 */
133 } __attribute__((packed));
135 struct detailed_data_color_point {
140 } __attribute__((packed));
144 } __attribute__((packed));
146 struct detailed_non_pixel {
148 u8 type; /* ff=serial, fe=string, fd=monitor range, fc=monitor name
149 fb=color point data, fa=standard timing data,
150 f9=undefined, f8=mfg. reserved */
153 struct detailed_data_string str;
154 struct detailed_data_monitor_range range;
155 struct detailed_data_wpindex color;
156 struct std_timing timings[6];
157 struct cvt_timing cvt[4];
158 } __attribute__((packed)) data;
159 } __attribute__((packed));
161 #define EDID_DETAIL_EST_TIMINGS 0xf7
162 #define EDID_DETAIL_CVT_3BYTE 0xf8
163 #define EDID_DETAIL_COLOR_MGMT_DATA 0xf9
164 #define EDID_DETAIL_STD_MODES 0xfa
165 #define EDID_DETAIL_MONITOR_CPDATA 0xfb
166 #define EDID_DETAIL_MONITOR_NAME 0xfc
167 #define EDID_DETAIL_MONITOR_RANGE 0xfd
168 #define EDID_DETAIL_MONITOR_STRING 0xfe
169 #define EDID_DETAIL_MONITOR_SERIAL 0xff
171 struct detailed_timing {
172 __le16 pixel_clock; /* need to multiply by 10 KHz */
174 struct detailed_pixel_timing pixel_data;
175 struct detailed_non_pixel other_data;
176 } __attribute__((packed)) data;
177 } __attribute__((packed));
179 #define DRM_EDID_INPUT_SERRATION_VSYNC (1 << 0)
180 #define DRM_EDID_INPUT_SYNC_ON_GREEN (1 << 1)
181 #define DRM_EDID_INPUT_COMPOSITE_SYNC (1 << 2)
182 #define DRM_EDID_INPUT_SEPARATE_SYNCS (1 << 3)
183 #define DRM_EDID_INPUT_BLANK_TO_BLACK (1 << 4)
184 #define DRM_EDID_INPUT_VIDEO_LEVEL (3 << 5)
185 #define DRM_EDID_INPUT_DIGITAL (1 << 7)
186 #define DRM_EDID_DIGITAL_DEPTH_MASK (7 << 4) /* 1.4 */
187 #define DRM_EDID_DIGITAL_DEPTH_UNDEF (0 << 4) /* 1.4 */
188 #define DRM_EDID_DIGITAL_DEPTH_6 (1 << 4) /* 1.4 */
189 #define DRM_EDID_DIGITAL_DEPTH_8 (2 << 4) /* 1.4 */
190 #define DRM_EDID_DIGITAL_DEPTH_10 (3 << 4) /* 1.4 */
191 #define DRM_EDID_DIGITAL_DEPTH_12 (4 << 4) /* 1.4 */
192 #define DRM_EDID_DIGITAL_DEPTH_14 (5 << 4) /* 1.4 */
193 #define DRM_EDID_DIGITAL_DEPTH_16 (6 << 4) /* 1.4 */
194 #define DRM_EDID_DIGITAL_DEPTH_RSVD (7 << 4) /* 1.4 */
195 #define DRM_EDID_DIGITAL_TYPE_MASK (7 << 0) /* 1.4 */
196 #define DRM_EDID_DIGITAL_TYPE_UNDEF (0 << 0) /* 1.4 */
197 #define DRM_EDID_DIGITAL_TYPE_DVI (1 << 0) /* 1.4 */
198 #define DRM_EDID_DIGITAL_TYPE_HDMI_A (2 << 0) /* 1.4 */
199 #define DRM_EDID_DIGITAL_TYPE_HDMI_B (3 << 0) /* 1.4 */
200 #define DRM_EDID_DIGITAL_TYPE_MDDI (4 << 0) /* 1.4 */
201 #define DRM_EDID_DIGITAL_TYPE_DP (5 << 0) /* 1.4 */
202 #define DRM_EDID_DIGITAL_DFP_1_X (1 << 0) /* 1.3 */
204 #define DRM_EDID_FEATURE_DEFAULT_GTF (1 << 0)
205 #define DRM_EDID_FEATURE_PREFERRED_TIMING (1 << 1)
206 #define DRM_EDID_FEATURE_STANDARD_COLOR (1 << 2)
208 #define DRM_EDID_FEATURE_DISPLAY_TYPE (3 << 3) /* 00=mono, 01=rgb, 10=non-rgb, 11=unknown */
210 #define DRM_EDID_FEATURE_COLOR_MASK (3 << 3)
211 #define DRM_EDID_FEATURE_RGB (0 << 3)
212 #define DRM_EDID_FEATURE_RGB_YCRCB444 (1 << 3)
213 #define DRM_EDID_FEATURE_RGB_YCRCB422 (2 << 3)
214 #define DRM_EDID_FEATURE_RGB_YCRCB (3 << 3) /* both 4:4:4 and 4:2:2 */
216 #define DRM_EDID_FEATURE_PM_ACTIVE_OFF (1 << 5)
217 #define DRM_EDID_FEATURE_PM_SUSPEND (1 << 6)
218 #define DRM_EDID_FEATURE_PM_STANDBY (1 << 7)
220 #define DRM_EDID_HDMI_DC_48 (1 << 6)
221 #define DRM_EDID_HDMI_DC_36 (1 << 5)
222 #define DRM_EDID_HDMI_DC_30 (1 << 4)
223 #define DRM_EDID_HDMI_DC_Y444 (1 << 3)
225 /* YCBCR 420 deep color modes */
226 #define DRM_EDID_YCBCR420_DC_48 (1 << 2)
227 #define DRM_EDID_YCBCR420_DC_36 (1 << 1)
228 #define DRM_EDID_YCBCR420_DC_30 (1 << 0)
229 #define DRM_EDID_YCBCR420_DC_MASK (DRM_EDID_YCBCR420_DC_48 | \
230 DRM_EDID_YCBCR420_DC_36 | \
231 DRM_EDID_YCBCR420_DC_30)
233 /* HDMI 2.1 additional fields */
234 #define DRM_EDID_MAX_FRL_RATE_MASK 0xf0
235 #define DRM_EDID_FAPA_START_LOCATION (1 << 0)
236 #define DRM_EDID_ALLM (1 << 1)
237 #define DRM_EDID_FVA (1 << 2)
239 /* Deep Color specific */
240 #define DRM_EDID_DC_30BIT_420 (1 << 0)
241 #define DRM_EDID_DC_36BIT_420 (1 << 1)
242 #define DRM_EDID_DC_48BIT_420 (1 << 2)
245 #define DRM_EDID_CNMVRR (1 << 3)
246 #define DRM_EDID_CINEMA_VRR (1 << 4)
247 #define DRM_EDID_MDELTA (1 << 5)
248 #define DRM_EDID_VRR_MAX_UPPER_MASK 0xc0
249 #define DRM_EDID_VRR_MAX_LOWER_MASK 0xff
250 #define DRM_EDID_VRR_MIN_MASK 0x3f
253 #define DRM_EDID_DSC_10BPC (1 << 0)
254 #define DRM_EDID_DSC_12BPC (1 << 1)
255 #define DRM_EDID_DSC_16BPC (1 << 2)
256 #define DRM_EDID_DSC_ALL_BPP (1 << 3)
257 #define DRM_EDID_DSC_NATIVE_420 (1 << 6)
258 #define DRM_EDID_DSC_1P2 (1 << 7)
259 #define DRM_EDID_DSC_MAX_FRL_RATE_MASK 0xf0
260 #define DRM_EDID_DSC_MAX_SLICES 0xf
261 #define DRM_EDID_DSC_TOTAL_CHUNK_KBYTES 0x3f
263 /* ELD Header Block */
264 #define DRM_ELD_HEADER_BLOCK_SIZE 4
266 #define DRM_ELD_VER 0
267 # define DRM_ELD_VER_SHIFT 3
268 # define DRM_ELD_VER_MASK (0x1f << 3)
269 # define DRM_ELD_VER_CEA861D (2 << 3) /* supports 861D or below */
270 # define DRM_ELD_VER_CANNED (0x1f << 3)
272 #define DRM_ELD_BASELINE_ELD_LEN 2 /* in dwords! */
274 /* ELD Baseline Block for ELD_Ver == 2 */
275 #define DRM_ELD_CEA_EDID_VER_MNL 4
276 # define DRM_ELD_CEA_EDID_VER_SHIFT 5
277 # define DRM_ELD_CEA_EDID_VER_MASK (7 << 5)
278 # define DRM_ELD_CEA_EDID_VER_NONE (0 << 5)
279 # define DRM_ELD_CEA_EDID_VER_CEA861 (1 << 5)
280 # define DRM_ELD_CEA_EDID_VER_CEA861A (2 << 5)
281 # define DRM_ELD_CEA_EDID_VER_CEA861BCD (3 << 5)
282 # define DRM_ELD_MNL_SHIFT 0
283 # define DRM_ELD_MNL_MASK (0x1f << 0)
285 #define DRM_ELD_SAD_COUNT_CONN_TYPE 5
286 # define DRM_ELD_SAD_COUNT_SHIFT 4
287 # define DRM_ELD_SAD_COUNT_MASK (0xf << 4)
288 # define DRM_ELD_CONN_TYPE_SHIFT 2
289 # define DRM_ELD_CONN_TYPE_MASK (3 << 2)
290 # define DRM_ELD_CONN_TYPE_HDMI (0 << 2)
291 # define DRM_ELD_CONN_TYPE_DP (1 << 2)
292 # define DRM_ELD_SUPPORTS_AI (1 << 1)
293 # define DRM_ELD_SUPPORTS_HDCP (1 << 0)
295 #define DRM_ELD_AUD_SYNCH_DELAY 6 /* in units of 2 ms */
296 # define DRM_ELD_AUD_SYNCH_DELAY_MAX 0xfa /* 500 ms */
298 #define DRM_ELD_SPEAKER 7
299 # define DRM_ELD_SPEAKER_MASK 0x7f
300 # define DRM_ELD_SPEAKER_RLRC (1 << 6)
301 # define DRM_ELD_SPEAKER_FLRC (1 << 5)
302 # define DRM_ELD_SPEAKER_RC (1 << 4)
303 # define DRM_ELD_SPEAKER_RLR (1 << 3)
304 # define DRM_ELD_SPEAKER_FC (1 << 2)
305 # define DRM_ELD_SPEAKER_LFE (1 << 1)
306 # define DRM_ELD_SPEAKER_FLR (1 << 0)
308 #define DRM_ELD_PORT_ID 8 /* offsets 8..15 inclusive */
309 # define DRM_ELD_PORT_ID_LEN 8
311 #define DRM_ELD_MANUFACTURER_NAME0 16
312 #define DRM_ELD_MANUFACTURER_NAME1 17
314 #define DRM_ELD_PRODUCT_CODE0 18
315 #define DRM_ELD_PRODUCT_CODE1 19
317 #define DRM_ELD_MONITOR_NAME_STRING 20 /* offsets 20..(20+mnl-1) inclusive */
319 #define DRM_ELD_CEA_SAD(mnl, sad) (20 + (mnl) + 3 * (sad))
323 /* Vendor & product info */
326 u32 serial; /* FIXME: byte order */
338 /* Color characteristics */
349 /* Est. timings and mfg rsvd timings*/
350 struct est_timings established_timings;
351 /* Standard timings 1-8*/
352 struct std_timing standard_timings[8];
353 /* Detailing timings 1-4 */
354 struct detailed_timing detailed_timings[4];
355 /* Number of 128 byte ext. blocks */
359 } __attribute__((packed));
361 #define EDID_PRODUCT_ID(e) ((e)->prod_code[0] | ((e)->prod_code[1] << 8))
363 /* Short Audio Descriptor */
366 u8 channels; /* max number of channels - 1 */
368 u8 byte2; /* meaning depends on format */
372 struct drm_connector;
373 struct drm_connector_state;
374 struct drm_display_mode;
376 int drm_edid_to_sad(const struct edid *edid, struct cea_sad **sads);
377 int drm_edid_to_speaker_allocation(const struct edid *edid, u8 **sadb);
378 int drm_av_sync_delay(struct drm_connector *connector,
379 const struct drm_display_mode *mode);
381 #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
382 struct edid *drm_load_edid_firmware(struct drm_connector *connector);
383 int __drm_set_edid_firmware_path(const char *path);
384 int __drm_get_edid_firmware_path(char *buf, size_t bufsize);
386 static inline struct edid *
387 drm_load_edid_firmware(struct drm_connector *connector)
389 return ERR_PTR(-ENOENT);
393 bool drm_edid_are_equal(const struct edid *edid1, const struct edid *edid2);
396 drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame,
397 const struct drm_connector *connector,
398 const struct drm_display_mode *mode);
400 drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame,
401 const struct drm_connector *connector,
402 const struct drm_display_mode *mode);
405 drm_hdmi_avi_infoframe_quant_range(struct hdmi_avi_infoframe *frame,
406 const struct drm_connector *connector,
407 const struct drm_display_mode *mode,
408 enum hdmi_quantization_range rgb_quant_range);
411 * drm_eld_mnl - Get ELD monitor name length in bytes.
412 * @eld: pointer to an eld memory structure with mnl set
414 static inline int drm_eld_mnl(const uint8_t *eld)
416 return (eld[DRM_ELD_CEA_EDID_VER_MNL] & DRM_ELD_MNL_MASK) >> DRM_ELD_MNL_SHIFT;
420 * drm_eld_sad - Get ELD SAD structures.
421 * @eld: pointer to an eld memory structure with sad_count set
423 static inline const uint8_t *drm_eld_sad(const uint8_t *eld)
425 unsigned int ver, mnl;
427 ver = (eld[DRM_ELD_VER] & DRM_ELD_VER_MASK) >> DRM_ELD_VER_SHIFT;
428 if (ver != 2 && ver != 31)
431 mnl = drm_eld_mnl(eld);
435 return eld + DRM_ELD_CEA_SAD(mnl, 0);
439 * drm_eld_sad_count - Get ELD SAD count.
440 * @eld: pointer to an eld memory structure with sad_count set
442 static inline int drm_eld_sad_count(const uint8_t *eld)
444 return (eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_SAD_COUNT_MASK) >>
445 DRM_ELD_SAD_COUNT_SHIFT;
449 * drm_eld_calc_baseline_block_size - Calculate baseline block size in bytes
450 * @eld: pointer to an eld memory structure with mnl and sad_count set
452 * This is a helper for determining the payload size of the baseline block, in
453 * bytes, for e.g. setting the Baseline_ELD_Len field in the ELD header block.
455 static inline int drm_eld_calc_baseline_block_size(const uint8_t *eld)
457 return DRM_ELD_MONITOR_NAME_STRING - DRM_ELD_HEADER_BLOCK_SIZE +
458 drm_eld_mnl(eld) + drm_eld_sad_count(eld) * 3;
462 * drm_eld_size - Get ELD size in bytes
463 * @eld: pointer to a complete eld memory structure
465 * The returned value does not include the vendor block. It's vendor specific,
466 * and comprises of the remaining bytes in the ELD memory buffer after
467 * drm_eld_size() bytes of header and baseline block.
469 * The returned value is guaranteed to be a multiple of 4.
471 static inline int drm_eld_size(const uint8_t *eld)
473 return DRM_ELD_HEADER_BLOCK_SIZE + eld[DRM_ELD_BASELINE_ELD_LEN] * 4;
477 * drm_eld_get_spk_alloc - Get speaker allocation
478 * @eld: pointer to an ELD memory structure
480 * The returned value is the speakers mask. User has to use %DRM_ELD_SPEAKER
481 * field definitions to identify speakers.
483 static inline u8 drm_eld_get_spk_alloc(const uint8_t *eld)
485 return eld[DRM_ELD_SPEAKER] & DRM_ELD_SPEAKER_MASK;
489 * drm_eld_get_conn_type - Get device type hdmi/dp connected
490 * @eld: pointer to an ELD memory structure
492 * The caller need to use %DRM_ELD_CONN_TYPE_HDMI or %DRM_ELD_CONN_TYPE_DP to
493 * identify the display type connected.
495 static inline u8 drm_eld_get_conn_type(const uint8_t *eld)
497 return eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_CONN_TYPE_MASK;
501 * drm_edid_decode_mfg_id - Decode the manufacturer ID
502 * @mfg_id: The manufacturer ID
503 * @vend: A 4-byte buffer to store the 3-letter vendor string plus a '\0'
506 static inline const char *drm_edid_decode_mfg_id(u16 mfg_id, char vend[4])
508 vend[0] = '@' + ((mfg_id >> 10) & 0x1f);
509 vend[1] = '@' + ((mfg_id >> 5) & 0x1f);
510 vend[2] = '@' + ((mfg_id >> 0) & 0x1f);
517 * drm_edid_encode_panel_id - Encode an ID for matching against drm_edid_get_panel_id()
518 * @vend_chr_0: First character of the vendor string.
519 * @vend_chr_1: Second character of the vendor string.
520 * @vend_chr_2: Third character of the vendor string.
521 * @product_id: The 16-bit product ID.
523 * This is a macro so that it can be calculated at compile time and used
527 * drm_edid_encode_panel_id('B', 'O', 'E', 0x2d08) => 0x09e52d08
529 * Return: a 32-bit ID per panel.
531 #define drm_edid_encode_panel_id(vend_chr_0, vend_chr_1, vend_chr_2, product_id) \
532 ((((u32)(vend_chr_0) - '@') & 0x1f) << 26 | \
533 (((u32)(vend_chr_1) - '@') & 0x1f) << 21 | \
534 (((u32)(vend_chr_2) - '@') & 0x1f) << 16 | \
535 ((product_id) & 0xffff))
538 * drm_edid_decode_panel_id - Decode a panel ID from drm_edid_encode_panel_id()
539 * @panel_id: The panel ID to decode.
540 * @vend: A 4-byte buffer to store the 3-letter vendor string plus a '\0'
542 * @product_id: The product ID will be returned here.
544 * For instance, after:
545 * drm_edid_decode_panel_id(0x09e52d08, vend, &product_id)
546 * These will be true:
551 * product_id = 0x2d08
553 static inline void drm_edid_decode_panel_id(u32 panel_id, char vend[4], u16 *product_id)
555 *product_id = (u16)(panel_id & 0xffff);
556 drm_edid_decode_mfg_id(panel_id >> 16, vend);
559 bool drm_probe_ddc(struct i2c_adapter *adapter);
560 struct edid *drm_do_get_edid(struct drm_connector *connector,
561 int (*get_edid_block)(void *data, u8 *buf, unsigned int block,
564 struct edid *drm_get_edid(struct drm_connector *connector,
565 struct i2c_adapter *adapter);
566 u32 drm_edid_get_panel_id(struct i2c_adapter *adapter);
567 struct edid *drm_get_edid_switcheroo(struct drm_connector *connector,
568 struct i2c_adapter *adapter);
569 struct edid *drm_edid_duplicate(const struct edid *edid);
570 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid);
571 int drm_add_override_edid_modes(struct drm_connector *connector);
573 u8 drm_match_cea_mode(const struct drm_display_mode *to_match);
574 bool drm_detect_hdmi_monitor(const struct edid *edid);
575 bool drm_detect_monitor_audio(const struct edid *edid);
576 enum hdmi_quantization_range
577 drm_default_rgb_quant_range(const struct drm_display_mode *mode);
578 int drm_add_modes_noedid(struct drm_connector *connector,
579 int hdisplay, int vdisplay);
580 void drm_set_preferred_mode(struct drm_connector *connector,
581 int hpref, int vpref);
583 int drm_edid_header_is_valid(const void *edid);
584 bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid,
586 bool drm_edid_is_valid(struct edid *edid);
587 void drm_edid_get_monitor_name(const struct edid *edid, char *name,
589 struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
590 int hsize, int vsize, int fresh,
592 struct drm_display_mode *
593 drm_display_mode_from_cea_vic(struct drm_device *dev,
596 /* Interface based on struct drm_edid */
597 const struct drm_edid *drm_edid_alloc(const void *edid, size_t size);
598 const struct drm_edid *drm_edid_dup(const struct drm_edid *drm_edid);
599 void drm_edid_free(const struct drm_edid *drm_edid);
600 const struct edid *drm_edid_raw(const struct drm_edid *drm_edid);
601 const struct drm_edid *drm_edid_read(struct drm_connector *connector);
602 const struct drm_edid *drm_edid_read_ddc(struct drm_connector *connector,
603 struct i2c_adapter *adapter);
604 const struct drm_edid *drm_edid_read_custom(struct drm_connector *connector,
605 int (*read_block)(void *context, u8 *buf, unsigned int block, size_t len),
607 int drm_edid_connector_update(struct drm_connector *connector,
608 const struct drm_edid *edid);
609 const u8 *drm_find_edid_extension(const struct drm_edid *drm_edid,
610 int ext_id, int *ext_index);
612 #endif /* __DRM_EDID_H__ */