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
29 struct drm_device;
30 struct 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
43 struct 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
57 struct 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 */
69 struct 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 */
89 struct detailed_data_string {
90 u8 str[13];
91 } __attribute__((packed));
92
93 struct 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
121 struct 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
128 struct detailed_data_color_point {
129 u8 windex1;
130 u8 wpindex1[3];
131 u8 windex2;
132 u8 wpindex2[3];
133 } __attribute__((packed));
134
135 struct cvt_timing {
136 u8 code[3];
137 } __attribute__((packed));
138
139 struct 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
164 struct 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 << 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 /* 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
282 struct 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 */
325 struct 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
332 struct drm_encoder;
333 struct drm_connector;
334 struct drm_display_mode;
335
336 int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads);
337 int drm_edid_to_speaker_allocation(struct edid *edid, u8 **sadb);
338 int drm_av_sync_delay(struct drm_connector *connector,
339 const struct drm_display_mode *mode);
340
341 #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
342 struct edid *drm_load_edid_firmware(struct drm_connector *connector);
343 int __drm_set_edid_firmware_path(const char *path);
344 int __drm_get_edid_firmware_path(char *buf, size_t bufsize);
345 #else
346 static inline struct edid *
drm_load_edid_firmware(struct drm_connector * connector)347 drm_load_edid_firmware(struct drm_connector *connector)
348 {
349 return ERR_PTR(-ENOENT);
350 }
351 #endif
352
353 int
354 drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame,
355 const struct drm_display_mode *mode,
356 bool is_hdmi2_sink);
357 int
358 drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame,
359 struct drm_connector *connector,
360 const struct drm_display_mode *mode);
361 void
362 drm_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 */
drm_eld_mnl(const uint8_t * eld)372 static 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 */
drm_eld_sad(const uint8_t * eld)381 static 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 */
drm_eld_sad_count(const uint8_t * eld)400 static 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 */
drm_eld_calc_baseline_block_size(const uint8_t * eld)413 static 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 */
drm_eld_size(const uint8_t * eld)429 static 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 */
drm_eld_get_spk_alloc(const uint8_t * eld)441 static 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 */
drm_eld_get_conn_type(const uint8_t * eld)453 static 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
458 bool drm_probe_ddc(struct i2c_adapter *adapter);
459 struct 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);
463 struct edid *drm_get_edid(struct drm_connector *connector,
464 struct i2c_adapter *adapter);
465 struct edid *drm_get_edid_switcheroo(struct drm_connector *connector,
466 struct i2c_adapter *adapter);
467 struct edid *drm_edid_duplicate(const struct edid *edid);
468 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid);
469
470 u8 drm_match_cea_mode(const struct drm_display_mode *to_match);
471 enum hdmi_picture_aspect drm_get_cea_aspect_ratio(const u8 video_code);
472 bool drm_detect_hdmi_monitor(struct edid *edid);
473 bool drm_detect_monitor_audio(struct edid *edid);
474 bool drm_rgb_quant_range_selectable(struct edid *edid);
475 enum hdmi_quantization_range
476 drm_default_rgb_quant_range(const struct drm_display_mode *mode);
477 int drm_add_modes_noedid(struct drm_connector *connector,
478 int hdisplay, int vdisplay);
479 void drm_set_preferred_mode(struct drm_connector *connector,
480 int hpref, int vpref);
481
482 int drm_edid_header_is_valid(const u8 *raw_edid);
483 bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid,
484 bool *edid_corrupt);
485 bool drm_edid_is_valid(struct edid *edid);
486 void drm_edid_get_monitor_name(struct edid *edid, char *name,
487 int buflen);
488 struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
489 int hsize, int vsize, int fresh,
490 bool rb);
491 #endif /* __DRM_EDID_H__ */
492
