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1/*
2 * Copyright © 2007-2008 Intel Corporation
3 * Jesse Barnes <jesse.barnes@intel.com>
4 *
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:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE 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.
22 */
23#ifndef __DRM_EDID_H__
24#define __DRM_EDID_H__
25
26#include <linux/types.h>
27#include <linux/hdmi.h>
28#include <drm/drm_mode.h>
29
30struct drm_device;
31struct i2c_adapter;
32
33#define EDID_LENGTH 128
34#define DDC_ADDR 0x50
35#define DDC_ADDR2 0x52 /* E-DDC 1.2 - where DisplayID can hide */
36
37#define CEA_EXT 0x02
38#define VTB_EXT 0x10
39#define DI_EXT 0x40
40#define LS_EXT 0x50
41#define MI_EXT 0x60
42#define DISPLAYID_EXT 0x70
43
44struct est_timings {
45 u8 t1;
46 u8 t2;
47 u8 mfg_rsvd;
48} __attribute__((packed));
49
50/* 00=16:10, 01=4:3, 10=5:4, 11=16:9 */
51#define EDID_TIMING_ASPECT_SHIFT 6
52#define EDID_TIMING_ASPECT_MASK (0x3 << EDID_TIMING_ASPECT_SHIFT)
53
54/* need to add 60 */
55#define EDID_TIMING_VFREQ_SHIFT 0
56#define EDID_TIMING_VFREQ_MASK (0x3f << EDID_TIMING_VFREQ_SHIFT)
57
58struct std_timing {
59 u8 hsize; /* need to multiply by 8 then add 248 */
60 u8 vfreq_aspect;
61} __attribute__((packed));
62
63#define DRM_EDID_PT_HSYNC_POSITIVE (1 << 1)
64#define DRM_EDID_PT_VSYNC_POSITIVE (1 << 2)
65#define DRM_EDID_PT_SEPARATE_SYNC (3 << 3)
66#define DRM_EDID_PT_STEREO (1 << 5)
67#define DRM_EDID_PT_INTERLACED (1 << 7)
68
69/* If detailed data is pixel timing */
70struct detailed_pixel_timing {
71 u8 hactive_lo;
72 u8 hblank_lo;
73 u8 hactive_hblank_hi;
74 u8 vactive_lo;
75 u8 vblank_lo;
76 u8 vactive_vblank_hi;
77 u8 hsync_offset_lo;
78 u8 hsync_pulse_width_lo;
79 u8 vsync_offset_pulse_width_lo;
80 u8 hsync_vsync_offset_pulse_width_hi;
81 u8 width_mm_lo;
82 u8 height_mm_lo;
83 u8 width_height_mm_hi;
84 u8 hborder;
85 u8 vborder;
86 u8 misc;
87} __attribute__((packed));
88
89/* If it's not pixel timing, it'll be one of the below */
90struct detailed_data_string {
91 u8 str[13];
92} __attribute__((packed));
93
94#define DRM_EDID_DEFAULT_GTF_SUPPORT_FLAG 0x00
95#define DRM_EDID_RANGE_LIMITS_ONLY_FLAG 0x01
96#define DRM_EDID_SECONDARY_GTF_SUPPORT_FLAG 0x02
97#define DRM_EDID_CVT_SUPPORT_FLAG 0x04
98
99struct detailed_data_monitor_range {
100 u8 min_vfreq;
101 u8 max_vfreq;
102 u8 min_hfreq_khz;
103 u8 max_hfreq_khz;
104 u8 pixel_clock_mhz; /* need to multiply by 10 */
105 u8 flags;
106 union {
107 struct {
108 u8 reserved;
109 u8 hfreq_start_khz; /* need to multiply by 2 */
110 u8 c; /* need to divide by 2 */
111 __le16 m;
112 u8 k;
113 u8 j; /* need to divide by 2 */
114 } __attribute__((packed)) gtf2;
115 struct {
116 u8 version;
117 u8 data1; /* high 6 bits: extra clock resolution */
118 u8 data2; /* plus low 2 of above: max hactive */
119 u8 supported_aspects;
120 u8 flags; /* preferred aspect and blanking support */
121 u8 supported_scalings;
122 u8 preferred_refresh;
123 } __attribute__((packed)) cvt;
124 } formula;
125} __attribute__((packed));
126
127struct detailed_data_wpindex {
128 u8 white_yx_lo; /* Lower 2 bits each */
129 u8 white_x_hi;
130 u8 white_y_hi;
131 u8 gamma; /* need to divide by 100 then add 1 */
132} __attribute__((packed));
133
134struct detailed_data_color_point {
135 u8 windex1;
136 u8 wpindex1[3];
137 u8 windex2;
138 u8 wpindex2[3];
139} __attribute__((packed));
140
141struct cvt_timing {
142 u8 code[3];
143} __attribute__((packed));
144
145struct detailed_non_pixel {
146 u8 pad1;
147 u8 type; /* ff=serial, fe=string, fd=monitor range, fc=monitor name
148 fb=color point data, fa=standard timing data,
149 f9=undefined, f8=mfg. reserved */
150 u8 pad2;
151 union {
152 struct detailed_data_string str;
153 struct detailed_data_monitor_range range;
154 struct detailed_data_wpindex color;
155 struct std_timing timings[6];
156 struct cvt_timing cvt[4];
157 } data;
158} __attribute__((packed));
159
160#define EDID_DETAIL_EST_TIMINGS 0xf7
161#define EDID_DETAIL_CVT_3BYTE 0xf8
162#define EDID_DETAIL_COLOR_MGMT_DATA 0xf9
163#define EDID_DETAIL_STD_MODES 0xfa
164#define EDID_DETAIL_MONITOR_CPDATA 0xfb
165#define EDID_DETAIL_MONITOR_NAME 0xfc
166#define EDID_DETAIL_MONITOR_RANGE 0xfd
167#define EDID_DETAIL_MONITOR_STRING 0xfe
168#define EDID_DETAIL_MONITOR_SERIAL 0xff
169
170struct detailed_timing {
171 __le16 pixel_clock; /* need to multiply by 10 KHz */
172 union {
173 struct detailed_pixel_timing pixel_data;
174 struct detailed_non_pixel other_data;
175 } data;
176} __attribute__((packed));
177
178#define DRM_EDID_INPUT_SERRATION_VSYNC (1 << 0)
179#define DRM_EDID_INPUT_SYNC_ON_GREEN (1 << 1)
180#define DRM_EDID_INPUT_COMPOSITE_SYNC (1 << 2)
181#define DRM_EDID_INPUT_SEPARATE_SYNCS (1 << 3)
182#define DRM_EDID_INPUT_BLANK_TO_BLACK (1 << 4)
183#define DRM_EDID_INPUT_VIDEO_LEVEL (3 << 5)
184#define DRM_EDID_INPUT_DIGITAL (1 << 7)
185#define DRM_EDID_DIGITAL_DEPTH_MASK (7 << 4) /* 1.4 */
186#define DRM_EDID_DIGITAL_DEPTH_UNDEF (0 << 4) /* 1.4 */
187#define DRM_EDID_DIGITAL_DEPTH_6 (1 << 4) /* 1.4 */
188#define DRM_EDID_DIGITAL_DEPTH_8 (2 << 4) /* 1.4 */
189#define DRM_EDID_DIGITAL_DEPTH_10 (3 << 4) /* 1.4 */
190#define DRM_EDID_DIGITAL_DEPTH_12 (4 << 4) /* 1.4 */
191#define DRM_EDID_DIGITAL_DEPTH_14 (5 << 4) /* 1.4 */
192#define DRM_EDID_DIGITAL_DEPTH_16 (6 << 4) /* 1.4 */
193#define DRM_EDID_DIGITAL_DEPTH_RSVD (7 << 4) /* 1.4 */
194#define DRM_EDID_DIGITAL_TYPE_MASK (7 << 0) /* 1.4 */
195#define DRM_EDID_DIGITAL_TYPE_UNDEF (0 << 0) /* 1.4 */
196#define DRM_EDID_DIGITAL_TYPE_DVI (1 << 0) /* 1.4 */
197#define DRM_EDID_DIGITAL_TYPE_HDMI_A (2 << 0) /* 1.4 */
198#define DRM_EDID_DIGITAL_TYPE_HDMI_B (3 << 0) /* 1.4 */
199#define DRM_EDID_DIGITAL_TYPE_MDDI (4 << 0) /* 1.4 */
200#define DRM_EDID_DIGITAL_TYPE_DP (5 << 0) /* 1.4 */
201#define DRM_EDID_DIGITAL_DFP_1_X (1 << 0) /* 1.3 */
202
203#define DRM_EDID_FEATURE_DEFAULT_GTF (1 << 0)
204#define DRM_EDID_FEATURE_PREFERRED_TIMING (1 << 1)
205#define DRM_EDID_FEATURE_STANDARD_COLOR (1 << 2)
206/* If analog */
207#define DRM_EDID_FEATURE_DISPLAY_TYPE (3 << 3) /* 00=mono, 01=rgb, 10=non-rgb, 11=unknown */
208/* If digital */
209#define DRM_EDID_FEATURE_COLOR_MASK (3 << 3)
210#define DRM_EDID_FEATURE_RGB (0 << 3)
211#define DRM_EDID_FEATURE_RGB_YCRCB444 (1 << 3)
212#define DRM_EDID_FEATURE_RGB_YCRCB422 (2 << 3)
213#define DRM_EDID_FEATURE_RGB_YCRCB (3 << 3) /* both 4:4:4 and 4:2:2 */
214
215#define DRM_EDID_FEATURE_PM_ACTIVE_OFF (1 << 5)
216#define DRM_EDID_FEATURE_PM_SUSPEND (1 << 6)
217#define DRM_EDID_FEATURE_PM_STANDBY (1 << 7)
218
219#define DRM_EDID_HDMI_DC_48 (1 << 6)
220#define DRM_EDID_HDMI_DC_36 (1 << 5)
221#define DRM_EDID_HDMI_DC_30 (1 << 4)
222#define DRM_EDID_HDMI_DC_Y444 (1 << 3)
223
224/* YCBCR 420 deep color modes */
225#define DRM_EDID_YCBCR420_DC_48 (1 << 2)
226#define DRM_EDID_YCBCR420_DC_36 (1 << 1)
227#define DRM_EDID_YCBCR420_DC_30 (1 << 0)
228#define DRM_EDID_YCBCR420_DC_MASK (DRM_EDID_YCBCR420_DC_48 | \
229 DRM_EDID_YCBCR420_DC_36 | \
230 DRM_EDID_YCBCR420_DC_30)
231
232/* HDMI 2.1 additional fields */
233#define DRM_EDID_MAX_FRL_RATE_MASK 0xf0
234#define DRM_EDID_FAPA_START_LOCATION (1 << 0)
235#define DRM_EDID_ALLM (1 << 1)
236#define DRM_EDID_FVA (1 << 2)
237
238/* Deep Color specific */
239#define DRM_EDID_DC_30BIT_420 (1 << 0)
240#define DRM_EDID_DC_36BIT_420 (1 << 1)
241#define DRM_EDID_DC_48BIT_420 (1 << 2)
242
243/* VRR specific */
244#define DRM_EDID_CNMVRR (1 << 3)
245#define DRM_EDID_CINEMA_VRR (1 << 4)
246#define DRM_EDID_MDELTA (1 << 5)
247#define DRM_EDID_VRR_MAX_UPPER_MASK 0xc0
248#define DRM_EDID_VRR_MAX_LOWER_MASK 0xff
249#define DRM_EDID_VRR_MIN_MASK 0x3f
250
251/* DSC specific */
252#define DRM_EDID_DSC_10BPC (1 << 0)
253#define DRM_EDID_DSC_12BPC (1 << 1)
254#define DRM_EDID_DSC_16BPC (1 << 2)
255#define DRM_EDID_DSC_ALL_BPP (1 << 3)
256#define DRM_EDID_DSC_NATIVE_420 (1 << 6)
257#define DRM_EDID_DSC_1P2 (1 << 7)
258#define DRM_EDID_DSC_MAX_FRL_RATE_MASK 0xf0
259#define DRM_EDID_DSC_MAX_SLICES 0xf
260#define DRM_EDID_DSC_TOTAL_CHUNK_KBYTES 0x3f
261
262/* ELD Header Block */
263#define DRM_ELD_HEADER_BLOCK_SIZE 4
264
265#define DRM_ELD_VER 0
266# define DRM_ELD_VER_SHIFT 3
267# define DRM_ELD_VER_MASK (0x1f << 3)
268# define DRM_ELD_VER_CEA861D (2 << 3) /* supports 861D or below */
269# define DRM_ELD_VER_CANNED (0x1f << 3)
270
271#define DRM_ELD_BASELINE_ELD_LEN 2 /* in dwords! */
272
273/* ELD Baseline Block for ELD_Ver == 2 */
274#define DRM_ELD_CEA_EDID_VER_MNL 4
275# define DRM_ELD_CEA_EDID_VER_SHIFT 5
276# define DRM_ELD_CEA_EDID_VER_MASK (7 << 5)
277# define DRM_ELD_CEA_EDID_VER_NONE (0 << 5)
278# define DRM_ELD_CEA_EDID_VER_CEA861 (1 << 5)
279# define DRM_ELD_CEA_EDID_VER_CEA861A (2 << 5)
280# define DRM_ELD_CEA_EDID_VER_CEA861BCD (3 << 5)
281# define DRM_ELD_MNL_SHIFT 0
282# define DRM_ELD_MNL_MASK (0x1f << 0)
283
284#define DRM_ELD_SAD_COUNT_CONN_TYPE 5
285# define DRM_ELD_SAD_COUNT_SHIFT 4
286# define DRM_ELD_SAD_COUNT_MASK (0xf << 4)
287# define DRM_ELD_CONN_TYPE_SHIFT 2
288# define DRM_ELD_CONN_TYPE_MASK (3 << 2)
289# define DRM_ELD_CONN_TYPE_HDMI (0 << 2)
290# define DRM_ELD_CONN_TYPE_DP (1 << 2)
291# define DRM_ELD_SUPPORTS_AI (1 << 1)
292# define DRM_ELD_SUPPORTS_HDCP (1 << 0)
293
294#define DRM_ELD_AUD_SYNCH_DELAY 6 /* in units of 2 ms */
295# define DRM_ELD_AUD_SYNCH_DELAY_MAX 0xfa /* 500 ms */
296
297#define DRM_ELD_SPEAKER 7
298# define DRM_ELD_SPEAKER_MASK 0x7f
299# define DRM_ELD_SPEAKER_RLRC (1 << 6)
300# define DRM_ELD_SPEAKER_FLRC (1 << 5)
301# define DRM_ELD_SPEAKER_RC (1 << 4)
302# define DRM_ELD_SPEAKER_RLR (1 << 3)
303# define DRM_ELD_SPEAKER_FC (1 << 2)
304# define DRM_ELD_SPEAKER_LFE (1 << 1)
305# define DRM_ELD_SPEAKER_FLR (1 << 0)
306
307#define DRM_ELD_PORT_ID 8 /* offsets 8..15 inclusive */
308# define DRM_ELD_PORT_ID_LEN 8
309
310#define DRM_ELD_MANUFACTURER_NAME0 16
311#define DRM_ELD_MANUFACTURER_NAME1 17
312
313#define DRM_ELD_PRODUCT_CODE0 18
314#define DRM_ELD_PRODUCT_CODE1 19
315
316#define DRM_ELD_MONITOR_NAME_STRING 20 /* offsets 20..(20+mnl-1) inclusive */
317
318#define DRM_ELD_CEA_SAD(mnl, sad) (20 + (mnl) + 3 * (sad))
319
320struct edid {
321 u8 header[8];
322 /* Vendor & product info */
323 u8 mfg_id[2];
324 u8 prod_code[2];
325 u32 serial; /* FIXME: byte order */
326 u8 mfg_week;
327 u8 mfg_year;
328 /* EDID version */
329 u8 version;
330 u8 revision;
331 /* Display info: */
332 u8 input;
333 u8 width_cm;
334 u8 height_cm;
335 u8 gamma;
336 u8 features;
337 /* Color characteristics */
338 u8 red_green_lo;
339 u8 black_white_lo;
340 u8 red_x;
341 u8 red_y;
342 u8 green_x;
343 u8 green_y;
344 u8 blue_x;
345 u8 blue_y;
346 u8 white_x;
347 u8 white_y;
348 /* Est. timings and mfg rsvd timings*/
349 struct est_timings established_timings;
350 /* Standard timings 1-8*/
351 struct std_timing standard_timings[8];
352 /* Detailing timings 1-4 */
353 struct detailed_timing detailed_timings[4];
354 /* Number of 128 byte ext. blocks */
355 u8 extensions;
356 /* Checksum */
357 u8 checksum;
358} __attribute__((packed));
359
360#define EDID_PRODUCT_ID(e) ((e)->prod_code[0] | ((e)->prod_code[1] << 8))
361
362/* Short Audio Descriptor */
363struct cea_sad {
364 u8 format;
365 u8 channels; /* max number of channels - 1 */
366 u8 freq;
367 u8 byte2; /* meaning depends on format */
368};
369
370struct drm_encoder;
371struct drm_connector;
372struct drm_connector_state;
373struct drm_display_mode;
374
375int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads);
376int drm_edid_to_speaker_allocation(struct edid *edid, u8 **sadb);
377int drm_av_sync_delay(struct drm_connector *connector,
378 const struct drm_display_mode *mode);
379
380#ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
381struct edid *drm_load_edid_firmware(struct drm_connector *connector);
382int __drm_set_edid_firmware_path(const char *path);
383int __drm_get_edid_firmware_path(char *buf, size_t bufsize);
384#else
385static inline struct edid *
386drm_load_edid_firmware(struct drm_connector *connector)
387{
388 return ERR_PTR(-ENOENT);
389}
390#endif
391
392bool drm_edid_are_equal(const struct edid *edid1, const struct edid *edid2);
393
394int
395drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame,
396 const struct drm_connector *connector,
397 const struct drm_display_mode *mode);
398int
399drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame,
400 const struct drm_connector *connector,
401 const struct drm_display_mode *mode);
402
403void
404drm_hdmi_avi_infoframe_colorspace(struct hdmi_avi_infoframe *frame,
405 const struct drm_connector_state *conn_state);
406
407void
408drm_hdmi_avi_infoframe_bars(struct hdmi_avi_infoframe *frame,
409 const struct drm_connector_state *conn_state);
410
411void
412drm_hdmi_avi_infoframe_quant_range(struct hdmi_avi_infoframe *frame,
413 const struct drm_connector *connector,
414 const struct drm_display_mode *mode,
415 enum hdmi_quantization_range rgb_quant_range);
416
417int
418drm_hdmi_infoframe_set_hdr_metadata(struct hdmi_drm_infoframe *frame,
419 const struct drm_connector_state *conn_state);
420
421/**
422 * drm_eld_mnl - Get ELD monitor name length in bytes.
423 * @eld: pointer to an eld memory structure with mnl set
424 */
425static inline int drm_eld_mnl(const uint8_t *eld)
426{
427 return (eld[DRM_ELD_CEA_EDID_VER_MNL] & DRM_ELD_MNL_MASK) >> DRM_ELD_MNL_SHIFT;
428}
429
430/**
431 * drm_eld_sad - Get ELD SAD structures.
432 * @eld: pointer to an eld memory structure with sad_count set
433 */
434static inline const uint8_t *drm_eld_sad(const uint8_t *eld)
435{
436 unsigned int ver, mnl;
437
438 ver = (eld[DRM_ELD_VER] & DRM_ELD_VER_MASK) >> DRM_ELD_VER_SHIFT;
439 if (ver != 2 && ver != 31)
440 return NULL;
441
442 mnl = drm_eld_mnl(eld);
443 if (mnl > 16)
444 return NULL;
445
446 return eld + DRM_ELD_CEA_SAD(mnl, 0);
447}
448
449/**
450 * drm_eld_sad_count - Get ELD SAD count.
451 * @eld: pointer to an eld memory structure with sad_count set
452 */
453static inline int drm_eld_sad_count(const uint8_t *eld)
454{
455 return (eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_SAD_COUNT_MASK) >>
456 DRM_ELD_SAD_COUNT_SHIFT;
457}
458
459/**
460 * drm_eld_calc_baseline_block_size - Calculate baseline block size in bytes
461 * @eld: pointer to an eld memory structure with mnl and sad_count set
462 *
463 * This is a helper for determining the payload size of the baseline block, in
464 * bytes, for e.g. setting the Baseline_ELD_Len field in the ELD header block.
465 */
466static inline int drm_eld_calc_baseline_block_size(const uint8_t *eld)
467{
468 return DRM_ELD_MONITOR_NAME_STRING - DRM_ELD_HEADER_BLOCK_SIZE +
469 drm_eld_mnl(eld) + drm_eld_sad_count(eld) * 3;
470}
471
472/**
473 * drm_eld_size - Get ELD size in bytes
474 * @eld: pointer to a complete eld memory structure
475 *
476 * The returned value does not include the vendor block. It's vendor specific,
477 * and comprises of the remaining bytes in the ELD memory buffer after
478 * drm_eld_size() bytes of header and baseline block.
479 *
480 * The returned value is guaranteed to be a multiple of 4.
481 */
482static inline int drm_eld_size(const uint8_t *eld)
483{
484 return DRM_ELD_HEADER_BLOCK_SIZE + eld[DRM_ELD_BASELINE_ELD_LEN] * 4;
485}
486
487/**
488 * drm_eld_get_spk_alloc - Get speaker allocation
489 * @eld: pointer to an ELD memory structure
490 *
491 * The returned value is the speakers mask. User has to use %DRM_ELD_SPEAKER
492 * field definitions to identify speakers.
493 */
494static inline u8 drm_eld_get_spk_alloc(const uint8_t *eld)
495{
496 return eld[DRM_ELD_SPEAKER] & DRM_ELD_SPEAKER_MASK;
497}
498
499/**
500 * drm_eld_get_conn_type - Get device type hdmi/dp connected
501 * @eld: pointer to an ELD memory structure
502 *
503 * The caller need to use %DRM_ELD_CONN_TYPE_HDMI or %DRM_ELD_CONN_TYPE_DP to
504 * identify the display type connected.
505 */
506static inline u8 drm_eld_get_conn_type(const uint8_t *eld)
507{
508 return eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_CONN_TYPE_MASK;
509}
510
511bool drm_probe_ddc(struct i2c_adapter *adapter);
512struct edid *drm_do_get_edid(struct drm_connector *connector,
513 int (*get_edid_block)(void *data, u8 *buf, unsigned int block,
514 size_t len),
515 void *data);
516struct edid *drm_get_edid(struct drm_connector *connector,
517 struct i2c_adapter *adapter);
518struct edid *drm_get_edid_switcheroo(struct drm_connector *connector,
519 struct i2c_adapter *adapter);
520struct edid *drm_edid_duplicate(const struct edid *edid);
521int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid);
522int drm_add_override_edid_modes(struct drm_connector *connector);
523
524u8 drm_match_cea_mode(const struct drm_display_mode *to_match);
525bool drm_detect_hdmi_monitor(struct edid *edid);
526bool drm_detect_monitor_audio(struct edid *edid);
527enum hdmi_quantization_range
528drm_default_rgb_quant_range(const struct drm_display_mode *mode);
529int drm_add_modes_noedid(struct drm_connector *connector,
530 int hdisplay, int vdisplay);
531void drm_set_preferred_mode(struct drm_connector *connector,
532 int hpref, int vpref);
533
534int drm_edid_header_is_valid(const u8 *raw_edid);
535bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid,
536 bool *edid_corrupt);
537bool drm_edid_is_valid(struct edid *edid);
538void drm_edid_get_monitor_name(struct edid *edid, char *name,
539 int buflen);
540struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
541 int hsize, int vsize, int fresh,
542 bool rb);
543struct drm_display_mode *
544drm_display_mode_from_cea_vic(struct drm_device *dev,
545 u8 video_code);
546const u8 *drm_find_edid_extension(const struct edid *edid,
547 int ext_id, int *ext_index);
548
549
550#endif /* __DRM_EDID_H__ */
1/*
2 * Copyright © 2007-2008 Intel Corporation
3 * Jesse Barnes <jesse.barnes@intel.com>
4 *
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:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE 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.
22 */
23#ifndef __DRM_EDID_H__
24#define __DRM_EDID_H__
25
26#include <linux/types.h>
27#include <linux/hdmi.h>
28
29struct drm_device;
30struct i2c_adapter;
31
32#define EDID_LENGTH 128
33#define DDC_ADDR 0x50
34#define DDC_ADDR2 0x52 /* E-DDC 1.2 - where DisplayID can hide */
35
36#define CEA_EXT 0x02
37#define VTB_EXT 0x10
38#define DI_EXT 0x40
39#define LS_EXT 0x50
40#define MI_EXT 0x60
41#define DISPLAYID_EXT 0x70
42
43struct est_timings {
44 u8 t1;
45 u8 t2;
46 u8 mfg_rsvd;
47} __attribute__((packed));
48
49/* 00=16:10, 01=4:3, 10=5:4, 11=16:9 */
50#define EDID_TIMING_ASPECT_SHIFT 6
51#define EDID_TIMING_ASPECT_MASK (0x3 << EDID_TIMING_ASPECT_SHIFT)
52
53/* need to add 60 */
54#define EDID_TIMING_VFREQ_SHIFT 0
55#define EDID_TIMING_VFREQ_MASK (0x3f << EDID_TIMING_VFREQ_SHIFT)
56
57struct std_timing {
58 u8 hsize; /* need to multiply by 8 then add 248 */
59 u8 vfreq_aspect;
60} __attribute__((packed));
61
62#define DRM_EDID_PT_HSYNC_POSITIVE (1 << 1)
63#define DRM_EDID_PT_VSYNC_POSITIVE (1 << 2)
64#define DRM_EDID_PT_SEPARATE_SYNC (3 << 3)
65#define DRM_EDID_PT_STEREO (1 << 5)
66#define DRM_EDID_PT_INTERLACED (1 << 7)
67
68/* If detailed data is pixel timing */
69struct detailed_pixel_timing {
70 u8 hactive_lo;
71 u8 hblank_lo;
72 u8 hactive_hblank_hi;
73 u8 vactive_lo;
74 u8 vblank_lo;
75 u8 vactive_vblank_hi;
76 u8 hsync_offset_lo;
77 u8 hsync_pulse_width_lo;
78 u8 vsync_offset_pulse_width_lo;
79 u8 hsync_vsync_offset_pulse_width_hi;
80 u8 width_mm_lo;
81 u8 height_mm_lo;
82 u8 width_height_mm_hi;
83 u8 hborder;
84 u8 vborder;
85 u8 misc;
86} __attribute__((packed));
87
88/* If it's not pixel timing, it'll be one of the below */
89struct detailed_data_string {
90 u8 str[13];
91} __attribute__((packed));
92
93struct detailed_data_monitor_range {
94 u8 min_vfreq;
95 u8 max_vfreq;
96 u8 min_hfreq_khz;
97 u8 max_hfreq_khz;
98 u8 pixel_clock_mhz; /* need to multiply by 10 */
99 u8 flags;
100 union {
101 struct {
102 u8 reserved;
103 u8 hfreq_start_khz; /* need to multiply by 2 */
104 u8 c; /* need to divide by 2 */
105 __le16 m;
106 u8 k;
107 u8 j; /* need to divide by 2 */
108 } __attribute__((packed)) gtf2;
109 struct {
110 u8 version;
111 u8 data1; /* high 6 bits: extra clock resolution */
112 u8 data2; /* plus low 2 of above: max hactive */
113 u8 supported_aspects;
114 u8 flags; /* preferred aspect and blanking support */
115 u8 supported_scalings;
116 u8 preferred_refresh;
117 } __attribute__((packed)) cvt;
118 } formula;
119} __attribute__((packed));
120
121struct detailed_data_wpindex {
122 u8 white_yx_lo; /* Lower 2 bits each */
123 u8 white_x_hi;
124 u8 white_y_hi;
125 u8 gamma; /* need to divide by 100 then add 1 */
126} __attribute__((packed));
127
128struct detailed_data_color_point {
129 u8 windex1;
130 u8 wpindex1[3];
131 u8 windex2;
132 u8 wpindex2[3];
133} __attribute__((packed));
134
135struct cvt_timing {
136 u8 code[3];
137} __attribute__((packed));
138
139struct detailed_non_pixel {
140 u8 pad1;
141 u8 type; /* ff=serial, fe=string, fd=monitor range, fc=monitor name
142 fb=color point data, fa=standard timing data,
143 f9=undefined, f8=mfg. reserved */
144 u8 pad2;
145 union {
146 struct detailed_data_string str;
147 struct detailed_data_monitor_range range;
148 struct detailed_data_wpindex color;
149 struct std_timing timings[6];
150 struct cvt_timing cvt[4];
151 } data;
152} __attribute__((packed));
153
154#define EDID_DETAIL_EST_TIMINGS 0xf7
155#define EDID_DETAIL_CVT_3BYTE 0xf8
156#define EDID_DETAIL_COLOR_MGMT_DATA 0xf9
157#define EDID_DETAIL_STD_MODES 0xfa
158#define EDID_DETAIL_MONITOR_CPDATA 0xfb
159#define EDID_DETAIL_MONITOR_NAME 0xfc
160#define EDID_DETAIL_MONITOR_RANGE 0xfd
161#define EDID_DETAIL_MONITOR_STRING 0xfe
162#define EDID_DETAIL_MONITOR_SERIAL 0xff
163
164struct detailed_timing {
165 __le16 pixel_clock; /* need to multiply by 10 KHz */
166 union {
167 struct detailed_pixel_timing pixel_data;
168 struct detailed_non_pixel other_data;
169 } data;
170} __attribute__((packed));
171
172#define DRM_EDID_INPUT_SERRATION_VSYNC (1 << 0)
173#define DRM_EDID_INPUT_SYNC_ON_GREEN (1 << 1)
174#define DRM_EDID_INPUT_COMPOSITE_SYNC (1 << 2)
175#define DRM_EDID_INPUT_SEPARATE_SYNCS (1 << 3)
176#define DRM_EDID_INPUT_BLANK_TO_BLACK (1 << 4)
177#define DRM_EDID_INPUT_VIDEO_LEVEL (3 << 5)
178#define DRM_EDID_INPUT_DIGITAL (1 << 7)
179#define DRM_EDID_DIGITAL_DEPTH_MASK (7 << 4)
180#define DRM_EDID_DIGITAL_DEPTH_UNDEF (0 << 4)
181#define DRM_EDID_DIGITAL_DEPTH_6 (1 << 4)
182#define DRM_EDID_DIGITAL_DEPTH_8 (2 << 4)
183#define DRM_EDID_DIGITAL_DEPTH_10 (3 << 4)
184#define DRM_EDID_DIGITAL_DEPTH_12 (4 << 4)
185#define DRM_EDID_DIGITAL_DEPTH_14 (5 << 4)
186#define DRM_EDID_DIGITAL_DEPTH_16 (6 << 4)
187#define DRM_EDID_DIGITAL_DEPTH_RSVD (7 << 4)
188#define DRM_EDID_DIGITAL_TYPE_UNDEF (0)
189#define DRM_EDID_DIGITAL_TYPE_DVI (1)
190#define DRM_EDID_DIGITAL_TYPE_HDMI_A (2)
191#define DRM_EDID_DIGITAL_TYPE_HDMI_B (3)
192#define DRM_EDID_DIGITAL_TYPE_MDDI (4)
193#define DRM_EDID_DIGITAL_TYPE_DP (5)
194
195#define DRM_EDID_FEATURE_DEFAULT_GTF (1 << 0)
196#define DRM_EDID_FEATURE_PREFERRED_TIMING (1 << 1)
197#define DRM_EDID_FEATURE_STANDARD_COLOR (1 << 2)
198/* If analog */
199#define DRM_EDID_FEATURE_DISPLAY_TYPE (3 << 3) /* 00=mono, 01=rgb, 10=non-rgb, 11=unknown */
200/* If digital */
201#define DRM_EDID_FEATURE_COLOR_MASK (3 << 3)
202#define DRM_EDID_FEATURE_RGB (0 << 3)
203#define DRM_EDID_FEATURE_RGB_YCRCB444 (1 << 3)
204#define DRM_EDID_FEATURE_RGB_YCRCB422 (2 << 3)
205#define DRM_EDID_FEATURE_RGB_YCRCB (3 << 3) /* both 4:4:4 and 4:2:2 */
206
207#define DRM_EDID_FEATURE_PM_ACTIVE_OFF (1 << 5)
208#define DRM_EDID_FEATURE_PM_SUSPEND (1 << 6)
209#define DRM_EDID_FEATURE_PM_STANDBY (1 << 7)
210
211#define DRM_EDID_HDMI_DC_48 (1 << 6)
212#define DRM_EDID_HDMI_DC_36 (1 << 5)
213#define DRM_EDID_HDMI_DC_30 (1 << 4)
214#define DRM_EDID_HDMI_DC_Y444 (1 << 3)
215
216/* YCBCR 420 deep color modes */
217#define DRM_EDID_YCBCR420_DC_48 (1 << 6)
218#define DRM_EDID_YCBCR420_DC_36 (1 << 5)
219#define DRM_EDID_YCBCR420_DC_30 (1 << 4)
220#define DRM_EDID_YCBCR420_DC_MASK (DRM_EDID_YCBCR420_DC_48 | \
221 DRM_EDID_YCBCR420_DC_36 | \
222 DRM_EDID_YCBCR420_DC_30)
223
224/* ELD Header Block */
225#define DRM_ELD_HEADER_BLOCK_SIZE 4
226
227#define DRM_ELD_VER 0
228# define DRM_ELD_VER_SHIFT 3
229# define DRM_ELD_VER_MASK (0x1f << 3)
230# define DRM_ELD_VER_CEA861D (2 << 3) /* supports 861D or below */
231# define DRM_ELD_VER_CANNED (0x1f << 3)
232
233#define DRM_ELD_BASELINE_ELD_LEN 2 /* in dwords! */
234
235/* ELD Baseline Block for ELD_Ver == 2 */
236#define DRM_ELD_CEA_EDID_VER_MNL 4
237# define DRM_ELD_CEA_EDID_VER_SHIFT 5
238# define DRM_ELD_CEA_EDID_VER_MASK (7 << 5)
239# define DRM_ELD_CEA_EDID_VER_NONE (0 << 5)
240# define DRM_ELD_CEA_EDID_VER_CEA861 (1 << 5)
241# define DRM_ELD_CEA_EDID_VER_CEA861A (2 << 5)
242# define DRM_ELD_CEA_EDID_VER_CEA861BCD (3 << 5)
243# define DRM_ELD_MNL_SHIFT 0
244# define DRM_ELD_MNL_MASK (0x1f << 0)
245
246#define DRM_ELD_SAD_COUNT_CONN_TYPE 5
247# define DRM_ELD_SAD_COUNT_SHIFT 4
248# define DRM_ELD_SAD_COUNT_MASK (0xf << 4)
249# define DRM_ELD_CONN_TYPE_SHIFT 2
250# define DRM_ELD_CONN_TYPE_MASK (3 << 2)
251# define DRM_ELD_CONN_TYPE_HDMI (0 << 2)
252# define DRM_ELD_CONN_TYPE_DP (1 << 2)
253# define DRM_ELD_SUPPORTS_AI (1 << 1)
254# define DRM_ELD_SUPPORTS_HDCP (1 << 0)
255
256#define DRM_ELD_AUD_SYNCH_DELAY 6 /* in units of 2 ms */
257# define DRM_ELD_AUD_SYNCH_DELAY_MAX 0xfa /* 500 ms */
258
259#define DRM_ELD_SPEAKER 7
260# define DRM_ELD_SPEAKER_MASK 0x7f
261# define DRM_ELD_SPEAKER_RLRC (1 << 6)
262# define DRM_ELD_SPEAKER_FLRC (1 << 5)
263# define DRM_ELD_SPEAKER_RC (1 << 4)
264# define DRM_ELD_SPEAKER_RLR (1 << 3)
265# define DRM_ELD_SPEAKER_FC (1 << 2)
266# define DRM_ELD_SPEAKER_LFE (1 << 1)
267# define DRM_ELD_SPEAKER_FLR (1 << 0)
268
269#define DRM_ELD_PORT_ID 8 /* offsets 8..15 inclusive */
270# define DRM_ELD_PORT_ID_LEN 8
271
272#define DRM_ELD_MANUFACTURER_NAME0 16
273#define DRM_ELD_MANUFACTURER_NAME1 17
274
275#define DRM_ELD_PRODUCT_CODE0 18
276#define DRM_ELD_PRODUCT_CODE1 19
277
278#define DRM_ELD_MONITOR_NAME_STRING 20 /* offsets 20..(20+mnl-1) inclusive */
279
280#define DRM_ELD_CEA_SAD(mnl, sad) (20 + (mnl) + 3 * (sad))
281
282struct edid {
283 u8 header[8];
284 /* Vendor & product info */
285 u8 mfg_id[2];
286 u8 prod_code[2];
287 u32 serial; /* FIXME: byte order */
288 u8 mfg_week;
289 u8 mfg_year;
290 /* EDID version */
291 u8 version;
292 u8 revision;
293 /* Display info: */
294 u8 input;
295 u8 width_cm;
296 u8 height_cm;
297 u8 gamma;
298 u8 features;
299 /* Color characteristics */
300 u8 red_green_lo;
301 u8 black_white_lo;
302 u8 red_x;
303 u8 red_y;
304 u8 green_x;
305 u8 green_y;
306 u8 blue_x;
307 u8 blue_y;
308 u8 white_x;
309 u8 white_y;
310 /* Est. timings and mfg rsvd timings*/
311 struct est_timings established_timings;
312 /* Standard timings 1-8*/
313 struct std_timing standard_timings[8];
314 /* Detailing timings 1-4 */
315 struct detailed_timing detailed_timings[4];
316 /* Number of 128 byte ext. blocks */
317 u8 extensions;
318 /* Checksum */
319 u8 checksum;
320} __attribute__((packed));
321
322#define EDID_PRODUCT_ID(e) ((e)->prod_code[0] | ((e)->prod_code[1] << 8))
323
324/* Short Audio Descriptor */
325struct cea_sad {
326 u8 format;
327 u8 channels; /* max number of channels - 1 */
328 u8 freq;
329 u8 byte2; /* meaning depends on format */
330};
331
332struct drm_encoder;
333struct drm_connector;
334struct drm_display_mode;
335
336int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads);
337int drm_edid_to_speaker_allocation(struct edid *edid, u8 **sadb);
338int drm_av_sync_delay(struct drm_connector *connector,
339 const struct drm_display_mode *mode);
340
341#ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
342struct edid *drm_load_edid_firmware(struct drm_connector *connector);
343int __drm_set_edid_firmware_path(const char *path);
344int __drm_get_edid_firmware_path(char *buf, size_t bufsize);
345#else
346static inline struct edid *
347drm_load_edid_firmware(struct drm_connector *connector)
348{
349 return ERR_PTR(-ENOENT);
350}
351#endif
352
353int
354drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame,
355 const struct drm_display_mode *mode,
356 bool is_hdmi2_sink);
357int
358drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame,
359 struct drm_connector *connector,
360 const struct drm_display_mode *mode);
361void
362drm_hdmi_avi_infoframe_quant_range(struct hdmi_avi_infoframe *frame,
363 const struct drm_display_mode *mode,
364 enum hdmi_quantization_range rgb_quant_range,
365 bool rgb_quant_range_selectable,
366 bool is_hdmi2_sink);
367
368/**
369 * drm_eld_mnl - Get ELD monitor name length in bytes.
370 * @eld: pointer to an eld memory structure with mnl set
371 */
372static inline int drm_eld_mnl(const uint8_t *eld)
373{
374 return (eld[DRM_ELD_CEA_EDID_VER_MNL] & DRM_ELD_MNL_MASK) >> DRM_ELD_MNL_SHIFT;
375}
376
377/**
378 * drm_eld_sad - Get ELD SAD structures.
379 * @eld: pointer to an eld memory structure with sad_count set
380 */
381static inline const uint8_t *drm_eld_sad(const uint8_t *eld)
382{
383 unsigned int ver, mnl;
384
385 ver = (eld[DRM_ELD_VER] & DRM_ELD_VER_MASK) >> DRM_ELD_VER_SHIFT;
386 if (ver != 2 && ver != 31)
387 return NULL;
388
389 mnl = drm_eld_mnl(eld);
390 if (mnl > 16)
391 return NULL;
392
393 return eld + DRM_ELD_CEA_SAD(mnl, 0);
394}
395
396/**
397 * drm_eld_sad_count - Get ELD SAD count.
398 * @eld: pointer to an eld memory structure with sad_count set
399 */
400static inline int drm_eld_sad_count(const uint8_t *eld)
401{
402 return (eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_SAD_COUNT_MASK) >>
403 DRM_ELD_SAD_COUNT_SHIFT;
404}
405
406/**
407 * drm_eld_calc_baseline_block_size - Calculate baseline block size in bytes
408 * @eld: pointer to an eld memory structure with mnl and sad_count set
409 *
410 * This is a helper for determining the payload size of the baseline block, in
411 * bytes, for e.g. setting the Baseline_ELD_Len field in the ELD header block.
412 */
413static inline int drm_eld_calc_baseline_block_size(const uint8_t *eld)
414{
415 return DRM_ELD_MONITOR_NAME_STRING - DRM_ELD_HEADER_BLOCK_SIZE +
416 drm_eld_mnl(eld) + drm_eld_sad_count(eld) * 3;
417}
418
419/**
420 * drm_eld_size - Get ELD size in bytes
421 * @eld: pointer to a complete eld memory structure
422 *
423 * The returned value does not include the vendor block. It's vendor specific,
424 * and comprises of the remaining bytes in the ELD memory buffer after
425 * drm_eld_size() bytes of header and baseline block.
426 *
427 * The returned value is guaranteed to be a multiple of 4.
428 */
429static inline int drm_eld_size(const uint8_t *eld)
430{
431 return DRM_ELD_HEADER_BLOCK_SIZE + eld[DRM_ELD_BASELINE_ELD_LEN] * 4;
432}
433
434/**
435 * drm_eld_get_spk_alloc - Get speaker allocation
436 * @eld: pointer to an ELD memory structure
437 *
438 * The returned value is the speakers mask. User has to use %DRM_ELD_SPEAKER
439 * field definitions to identify speakers.
440 */
441static inline u8 drm_eld_get_spk_alloc(const uint8_t *eld)
442{
443 return eld[DRM_ELD_SPEAKER] & DRM_ELD_SPEAKER_MASK;
444}
445
446/**
447 * drm_eld_get_conn_type - Get device type hdmi/dp connected
448 * @eld: pointer to an ELD memory structure
449 *
450 * The caller need to use %DRM_ELD_CONN_TYPE_HDMI or %DRM_ELD_CONN_TYPE_DP to
451 * identify the display type connected.
452 */
453static inline u8 drm_eld_get_conn_type(const uint8_t *eld)
454{
455 return eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_CONN_TYPE_MASK;
456}
457
458bool drm_probe_ddc(struct i2c_adapter *adapter);
459struct edid *drm_do_get_edid(struct drm_connector *connector,
460 int (*get_edid_block)(void *data, u8 *buf, unsigned int block,
461 size_t len),
462 void *data);
463struct edid *drm_get_edid(struct drm_connector *connector,
464 struct i2c_adapter *adapter);
465struct edid *drm_get_edid_switcheroo(struct drm_connector *connector,
466 struct i2c_adapter *adapter);
467struct edid *drm_edid_duplicate(const struct edid *edid);
468void drm_reset_display_info(struct drm_connector *connector);
469u32 drm_add_display_info(struct drm_connector *connector, const struct edid *edid);
470int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid);
471
472u8 drm_match_cea_mode(const struct drm_display_mode *to_match);
473enum hdmi_picture_aspect drm_get_cea_aspect_ratio(const u8 video_code);
474bool drm_detect_hdmi_monitor(struct edid *edid);
475bool drm_detect_monitor_audio(struct edid *edid);
476bool drm_rgb_quant_range_selectable(struct edid *edid);
477enum hdmi_quantization_range
478drm_default_rgb_quant_range(const struct drm_display_mode *mode);
479int drm_add_modes_noedid(struct drm_connector *connector,
480 int hdisplay, int vdisplay);
481void drm_set_preferred_mode(struct drm_connector *connector,
482 int hpref, int vpref);
483
484int drm_edid_header_is_valid(const u8 *raw_edid);
485bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid,
486 bool *edid_corrupt);
487bool drm_edid_is_valid(struct edid *edid);
488void drm_edid_get_monitor_name(struct edid *edid, char *name,
489 int buflen);
490struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
491 int hsize, int vsize, int fresh,
492 bool rb);
493#endif /* __DRM_EDID_H__ */