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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
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
50#define EDID_TIMING_ASPECT_SHIFT 6
51#define EDID_TIMING_ASPECT_MASK (0x3 << EDID_TIMING_ASPECT_SHIFT)
52
53
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;
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
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
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;
99 u8 flags;
100 union {
101 struct {
102 u8 reserved;
103 u8 hfreq_start_khz;
104 u8 c;
105 __le16 m;
106 u8 k;
107 u8 j;
108 } __attribute__((packed)) gtf2;
109 struct {
110 u8 version;
111 u8 data1;
112 u8 data2;
113 u8 supported_aspects;
114 u8 flags;
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;
123 u8 white_x_hi;
124 u8 white_y_hi;
125 u8 gamma;
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;
142
143
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;
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
199#define DRM_EDID_FEATURE_DISPLAY_TYPE (3 << 3)
200
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)
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
217#define DRM_EDID_YCBCR420_DC_48 (1 << 2)
218#define DRM_EDID_YCBCR420_DC_36 (1 << 1)
219#define DRM_EDID_YCBCR420_DC_30 (1 << 0)
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
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)
231# define DRM_ELD_VER_CANNED (0x1f << 3)
232
233#define DRM_ELD_BASELINE_ELD_LEN 2
234
235
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
257# define DRM_ELD_AUD_SYNCH_DELAY_MAX 0xfa
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
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
279
280#define DRM_ELD_CEA_SAD(mnl, sad) (20 + (mnl) + 3 * (sad))
281
282struct edid {
283 u8 header[8];
284
285 u8 mfg_id[2];
286 u8 prod_code[2];
287 u32 serial;
288 u8 mfg_week;
289 u8 mfg_year;
290
291 u8 version;
292 u8 revision;
293
294 u8 input;
295 u8 width_cm;
296 u8 height_cm;
297 u8 gamma;
298 u8 features;
299
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
311 struct est_timings established_timings;
312
313 struct std_timing standard_timings[8];
314
315 struct detailed_timing detailed_timings[4];
316
317 u8 extensions;
318
319 u8 checksum;
320} __attribute__((packed));
321
322#define EDID_PRODUCT_ID(e) ((e)->prod_code[0] | ((e)->prod_code[1] << 8))
323
324
325struct cea_sad {
326 u8 format;
327 u8 channels;
328 u8 freq;
329 u8 byte2;
330};
331
332struct drm_encoder;
333struct drm_connector;
334struct drm_connector_state;
335struct drm_display_mode;
336
337int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads);
338int drm_edid_to_speaker_allocation(struct edid *edid, u8 **sadb);
339int drm_av_sync_delay(struct drm_connector *connector,
340 const struct drm_display_mode *mode);
341
342#ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
343struct edid *drm_load_edid_firmware(struct drm_connector *connector);
344int __drm_set_edid_firmware_path(const char *path);
345int __drm_get_edid_firmware_path(char *buf, size_t bufsize);
346#else
347static inline struct edid *
348drm_load_edid_firmware(struct drm_connector *connector)
349{
350 return ERR_PTR(-ENOENT);
351}
352#endif
353
354int
355drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame,
356 struct drm_connector *connector,
357 const struct drm_display_mode *mode);
358int
359drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame,
360 struct drm_connector *connector,
361 const struct drm_display_mode *mode);
362
363void
364drm_hdmi_avi_infoframe_colorspace(struct hdmi_avi_infoframe *frame,
365 const struct drm_connector_state *conn_state);
366
367void
368drm_hdmi_avi_infoframe_quant_range(struct hdmi_avi_infoframe *frame,
369 struct drm_connector *connector,
370 const struct drm_display_mode *mode,
371 enum hdmi_quantization_range rgb_quant_range);
372
373
374
375
376
377static inline int drm_eld_mnl(const uint8_t *eld)
378{
379 return (eld[DRM_ELD_CEA_EDID_VER_MNL] & DRM_ELD_MNL_MASK) >> DRM_ELD_MNL_SHIFT;
380}
381
382
383
384
385
386static inline const uint8_t *drm_eld_sad(const uint8_t *eld)
387{
388 unsigned int ver, mnl;
389
390 ver = (eld[DRM_ELD_VER] & DRM_ELD_VER_MASK) >> DRM_ELD_VER_SHIFT;
391 if (ver != 2 && ver != 31)
392 return NULL;
393
394 mnl = drm_eld_mnl(eld);
395 if (mnl > 16)
396 return NULL;
397
398 return eld + DRM_ELD_CEA_SAD(mnl, 0);
399}
400
401
402
403
404
405static inline int drm_eld_sad_count(const uint8_t *eld)
406{
407 return (eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_SAD_COUNT_MASK) >>
408 DRM_ELD_SAD_COUNT_SHIFT;
409}
410
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416
417
418static inline int drm_eld_calc_baseline_block_size(const uint8_t *eld)
419{
420 return DRM_ELD_MONITOR_NAME_STRING - DRM_ELD_HEADER_BLOCK_SIZE +
421 drm_eld_mnl(eld) + drm_eld_sad_count(eld) * 3;
422}
423
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432
433
434static inline int drm_eld_size(const uint8_t *eld)
435{
436 return DRM_ELD_HEADER_BLOCK_SIZE + eld[DRM_ELD_BASELINE_ELD_LEN] * 4;
437}
438
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442
443
444
445
446static inline u8 drm_eld_get_spk_alloc(const uint8_t *eld)
447{
448 return eld[DRM_ELD_SPEAKER] & DRM_ELD_SPEAKER_MASK;
449}
450
451
452
453
454
455
456
457
458static inline u8 drm_eld_get_conn_type(const uint8_t *eld)
459{
460 return eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_CONN_TYPE_MASK;
461}
462
463bool drm_probe_ddc(struct i2c_adapter *adapter);
464struct edid *drm_do_get_edid(struct drm_connector *connector,
465 int (*get_edid_block)(void *data, u8 *buf, unsigned int block,
466 size_t len),
467 void *data);
468struct edid *drm_get_edid(struct drm_connector *connector,
469 struct i2c_adapter *adapter);
470struct edid *drm_get_edid_switcheroo(struct drm_connector *connector,
471 struct i2c_adapter *adapter);
472struct edid *drm_edid_duplicate(const struct edid *edid);
473int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid);
474int drm_add_override_edid_modes(struct drm_connector *connector);
475
476u8 drm_match_cea_mode(const struct drm_display_mode *to_match);
477enum hdmi_picture_aspect drm_get_cea_aspect_ratio(const u8 video_code);
478bool drm_detect_hdmi_monitor(struct edid *edid);
479bool drm_detect_monitor_audio(struct edid *edid);
480enum hdmi_quantization_range
481drm_default_rgb_quant_range(const struct drm_display_mode *mode);
482int drm_add_modes_noedid(struct drm_connector *connector,
483 int hdisplay, int vdisplay);
484void drm_set_preferred_mode(struct drm_connector *connector,
485 int hpref, int vpref);
486
487int drm_edid_header_is_valid(const u8 *raw_edid);
488bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid,
489 bool *edid_corrupt);
490bool drm_edid_is_valid(struct edid *edid);
491void drm_edid_get_monitor_name(struct edid *edid, char *name,
492 int buflen);
493struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
494 int hsize, int vsize, int fresh,
495 bool rb);
496#endif
497