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>
31 #define EDID_LENGTH 128
33 #define DDC_ADDR2 0x52 /* E-DDC 1.2 - where DisplayID can hide */
40 #define DISPLAYID_EXT 0x70
46 } __attribute__((packed));
48 /* 00=16:10, 01=4:3, 10=5:4, 11=16:9 */
49 #define EDID_TIMING_ASPECT_SHIFT 6
50 #define EDID_TIMING_ASPECT_MASK (0x3 << EDID_TIMING_ASPECT_SHIFT)
53 #define EDID_TIMING_VFREQ_SHIFT 0
54 #define EDID_TIMING_VFREQ_MASK (0x3f << EDID_TIMING_VFREQ_SHIFT)
57 u8 hsize; /* need to multiply by 8 then add 248 */
59 } __attribute__((packed));
61 #define DRM_EDID_PT_HSYNC_POSITIVE (1 << 1)
62 #define DRM_EDID_PT_VSYNC_POSITIVE (1 << 2)
63 #define DRM_EDID_PT_SEPARATE_SYNC (3 << 3)
64 #define DRM_EDID_PT_STEREO (1 << 5)
65 #define DRM_EDID_PT_INTERLACED (1 << 7)
67 /* If detailed data is pixel timing */
68 struct detailed_pixel_timing {
76 u8 hsync_pulse_width_lo;
77 u8 vsync_offset_pulse_width_lo;
78 u8 hsync_vsync_offset_pulse_width_hi;
81 u8 width_height_mm_hi;
85 } __attribute__((packed));
87 /* If it's not pixel timing, it'll be one of the below */
88 struct detailed_data_string {
90 } __attribute__((packed));
92 struct detailed_data_monitor_range {
97 u8 pixel_clock_mhz; /* need to multiply by 10 */
102 u8 hfreq_start_khz; /* need to multiply by 2 */
103 u8 c; /* need to divide by 2 */
106 u8 j; /* need to divide by 2 */
107 } __attribute__((packed)) gtf2;
110 u8 data1; /* high 6 bits: extra clock resolution */
111 u8 data2; /* plus low 2 of above: max hactive */
112 u8 supported_aspects;
113 u8 flags; /* preferred aspect and blanking support */
114 u8 supported_scalings;
115 u8 preferred_refresh;
116 } __attribute__((packed)) cvt;
118 } __attribute__((packed));
120 struct detailed_data_wpindex {
121 u8 white_yx_lo; /* Lower 2 bits each */
124 u8 gamma; /* need to divide by 100 then add 1 */
125 } __attribute__((packed));
127 struct detailed_data_color_point {
132 } __attribute__((packed));
136 } __attribute__((packed));
138 struct detailed_non_pixel {
140 u8 type; /* ff=serial, fe=string, fd=monitor range, fc=monitor name
141 fb=color point data, fa=standard timing data,
142 f9=undefined, f8=mfg. reserved */
145 struct detailed_data_string str;
146 struct detailed_data_monitor_range range;
147 struct detailed_data_wpindex color;
148 struct std_timing timings[6];
149 struct cvt_timing cvt[4];
151 } __attribute__((packed));
153 #define EDID_DETAIL_EST_TIMINGS 0xf7
154 #define EDID_DETAIL_CVT_3BYTE 0xf8
155 #define EDID_DETAIL_COLOR_MGMT_DATA 0xf9
156 #define EDID_DETAIL_STD_MODES 0xfa
157 #define EDID_DETAIL_MONITOR_CPDATA 0xfb
158 #define EDID_DETAIL_MONITOR_NAME 0xfc
159 #define EDID_DETAIL_MONITOR_RANGE 0xfd
160 #define EDID_DETAIL_MONITOR_STRING 0xfe
161 #define EDID_DETAIL_MONITOR_SERIAL 0xff
163 struct detailed_timing {
164 __le16 pixel_clock; /* need to multiply by 10 KHz */
166 struct detailed_pixel_timing pixel_data;
167 struct detailed_non_pixel other_data;
169 } __attribute__((packed));
171 #define DRM_EDID_INPUT_SERRATION_VSYNC (1 << 0)
172 #define DRM_EDID_INPUT_SYNC_ON_GREEN (1 << 1)
173 #define DRM_EDID_INPUT_COMPOSITE_SYNC (1 << 2)
174 #define DRM_EDID_INPUT_SEPARATE_SYNCS (1 << 3)
175 #define DRM_EDID_INPUT_BLANK_TO_BLACK (1 << 4)
176 #define DRM_EDID_INPUT_VIDEO_LEVEL (3 << 5)
177 #define DRM_EDID_INPUT_DIGITAL (1 << 7)
178 #define DRM_EDID_DIGITAL_DEPTH_MASK (7 << 4)
179 #define DRM_EDID_DIGITAL_DEPTH_UNDEF (0 << 4)
180 #define DRM_EDID_DIGITAL_DEPTH_6 (1 << 4)
181 #define DRM_EDID_DIGITAL_DEPTH_8 (2 << 4)
182 #define DRM_EDID_DIGITAL_DEPTH_10 (3 << 4)
183 #define DRM_EDID_DIGITAL_DEPTH_12 (4 << 4)
184 #define DRM_EDID_DIGITAL_DEPTH_14 (5 << 4)
185 #define DRM_EDID_DIGITAL_DEPTH_16 (6 << 4)
186 #define DRM_EDID_DIGITAL_DEPTH_RSVD (7 << 4)
187 #define DRM_EDID_DIGITAL_TYPE_UNDEF (0)
188 #define DRM_EDID_DIGITAL_TYPE_DVI (1)
189 #define DRM_EDID_DIGITAL_TYPE_HDMI_A (2)
190 #define DRM_EDID_DIGITAL_TYPE_HDMI_B (3)
191 #define DRM_EDID_DIGITAL_TYPE_MDDI (4)
192 #define DRM_EDID_DIGITAL_TYPE_DP (5)
194 #define DRM_EDID_FEATURE_DEFAULT_GTF (1 << 0)
195 #define DRM_EDID_FEATURE_PREFERRED_TIMING (1 << 1)
196 #define DRM_EDID_FEATURE_STANDARD_COLOR (1 << 2)
198 #define DRM_EDID_FEATURE_DISPLAY_TYPE (3 << 3) /* 00=mono, 01=rgb, 10=non-rgb, 11=unknown */
200 #define DRM_EDID_FEATURE_COLOR_MASK (3 << 3)
201 #define DRM_EDID_FEATURE_RGB (0 << 3)
202 #define DRM_EDID_FEATURE_RGB_YCRCB444 (1 << 3)
203 #define DRM_EDID_FEATURE_RGB_YCRCB422 (2 << 3)
204 #define DRM_EDID_FEATURE_RGB_YCRCB (3 << 3) /* both 4:4:4 and 4:2:2 */
206 #define DRM_EDID_FEATURE_PM_ACTIVE_OFF (1 << 5)
207 #define DRM_EDID_FEATURE_PM_SUSPEND (1 << 6)
208 #define DRM_EDID_FEATURE_PM_STANDBY (1 << 7)
210 #define DRM_EDID_HDMI_DC_48 (1 << 6)
211 #define DRM_EDID_HDMI_DC_36 (1 << 5)
212 #define DRM_EDID_HDMI_DC_30 (1 << 4)
213 #define DRM_EDID_HDMI_DC_Y444 (1 << 3)
215 /* ELD Header Block */
216 #define DRM_ELD_HEADER_BLOCK_SIZE 4
218 #define DRM_ELD_VER 0
219 # define DRM_ELD_VER_SHIFT 3
220 # define DRM_ELD_VER_MASK (0x1f << 3)
221 # define DRM_ELD_VER_CEA861D (2 << 3) /* supports 861D or below */
222 # define DRM_ELD_VER_CANNED (0x1f << 3)
224 #define DRM_ELD_BASELINE_ELD_LEN 2 /* in dwords! */
226 /* ELD Baseline Block for ELD_Ver == 2 */
227 #define DRM_ELD_CEA_EDID_VER_MNL 4
228 # define DRM_ELD_CEA_EDID_VER_SHIFT 5
229 # define DRM_ELD_CEA_EDID_VER_MASK (7 << 5)
230 # define DRM_ELD_CEA_EDID_VER_NONE (0 << 5)
231 # define DRM_ELD_CEA_EDID_VER_CEA861 (1 << 5)
232 # define DRM_ELD_CEA_EDID_VER_CEA861A (2 << 5)
233 # define DRM_ELD_CEA_EDID_VER_CEA861BCD (3 << 5)
234 # define DRM_ELD_MNL_SHIFT 0
235 # define DRM_ELD_MNL_MASK (0x1f << 0)
237 #define DRM_ELD_SAD_COUNT_CONN_TYPE 5
238 # define DRM_ELD_SAD_COUNT_SHIFT 4
239 # define DRM_ELD_SAD_COUNT_MASK (0xf << 4)
240 # define DRM_ELD_CONN_TYPE_SHIFT 2
241 # define DRM_ELD_CONN_TYPE_MASK (3 << 2)
242 # define DRM_ELD_CONN_TYPE_HDMI (0 << 2)
243 # define DRM_ELD_CONN_TYPE_DP (1 << 2)
244 # define DRM_ELD_SUPPORTS_AI (1 << 1)
245 # define DRM_ELD_SUPPORTS_HDCP (1 << 0)
247 #define DRM_ELD_AUD_SYNCH_DELAY 6 /* in units of 2 ms */
248 # define DRM_ELD_AUD_SYNCH_DELAY_MAX 0xfa /* 500 ms */
250 #define DRM_ELD_SPEAKER 7
251 # define DRM_ELD_SPEAKER_RLRC (1 << 6)
252 # define DRM_ELD_SPEAKER_FLRC (1 << 5)
253 # define DRM_ELD_SPEAKER_RC (1 << 4)
254 # define DRM_ELD_SPEAKER_RLR (1 << 3)
255 # define DRM_ELD_SPEAKER_FC (1 << 2)
256 # define DRM_ELD_SPEAKER_LFE (1 << 1)
257 # define DRM_ELD_SPEAKER_FLR (1 << 0)
259 #define DRM_ELD_PORT_ID 8 /* offsets 8..15 inclusive */
260 # define DRM_ELD_PORT_ID_LEN 8
262 #define DRM_ELD_MANUFACTURER_NAME0 16
263 #define DRM_ELD_MANUFACTURER_NAME1 17
265 #define DRM_ELD_PRODUCT_CODE0 18
266 #define DRM_ELD_PRODUCT_CODE1 19
268 #define DRM_ELD_MONITOR_NAME_STRING 20 /* offsets 20..(20+mnl-1) inclusive */
270 #define DRM_ELD_CEA_SAD(mnl, sad) (20 + (mnl) + 3 * (sad))
274 /* Vendor & product info */
277 u32 serial; /* FIXME: byte order */
289 /* Color characteristics */
300 /* Est. timings and mfg rsvd timings*/
301 struct est_timings established_timings;
302 /* Standard timings 1-8*/
303 struct std_timing standard_timings[8];
304 /* Detailing timings 1-4 */
305 struct detailed_timing detailed_timings[4];
306 /* Number of 128 byte ext. blocks */
310 } __attribute__((packed));
312 #define EDID_PRODUCT_ID(e) ((e)->prod_code[0] | ((e)->prod_code[1] << 8))
314 /* Short Audio Descriptor */
317 u8 channels; /* max number of channels - 1 */
319 u8 byte2; /* meaning depends on format */
323 struct drm_connector;
324 struct drm_display_mode;
325 struct hdmi_avi_infoframe;
326 struct hdmi_vendor_infoframe;
328 void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid);
329 int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads);
330 int drm_edid_to_speaker_allocation(struct edid *edid, u8 **sadb);
331 int drm_av_sync_delay(struct drm_connector *connector,
332 const struct drm_display_mode *mode);
334 #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
335 int drm_load_edid_firmware(struct drm_connector *connector);
337 static inline int drm_load_edid_firmware(struct drm_connector *connector)
344 drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame,
345 const struct drm_display_mode *mode);
347 drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame,
348 const struct drm_display_mode *mode);
351 * drm_eld_mnl - Get ELD monitor name length in bytes.
352 * @eld: pointer to an eld memory structure with mnl set
354 static inline int drm_eld_mnl(const uint8_t *eld)
356 return (eld[DRM_ELD_CEA_EDID_VER_MNL] & DRM_ELD_MNL_MASK) >> DRM_ELD_MNL_SHIFT;
360 * drm_eld_sad - Get ELD SAD structures.
361 * @eld: pointer to an eld memory structure with sad_count set
363 static inline const uint8_t *drm_eld_sad(const uint8_t *eld)
365 unsigned int ver, mnl;
367 ver = (eld[DRM_ELD_VER] & DRM_ELD_VER_MASK) >> DRM_ELD_VER_SHIFT;
368 if (ver != 2 && ver != 31)
371 mnl = drm_eld_mnl(eld);
375 return eld + DRM_ELD_CEA_SAD(mnl, 0);
379 * drm_eld_sad_count - Get ELD SAD count.
380 * @eld: pointer to an eld memory structure with sad_count set
382 static inline int drm_eld_sad_count(const uint8_t *eld)
384 return (eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_SAD_COUNT_MASK) >>
385 DRM_ELD_SAD_COUNT_SHIFT;
389 * drm_eld_calc_baseline_block_size - Calculate baseline block size in bytes
390 * @eld: pointer to an eld memory structure with mnl and sad_count set
392 * This is a helper for determining the payload size of the baseline block, in
393 * bytes, for e.g. setting the Baseline_ELD_Len field in the ELD header block.
395 static inline int drm_eld_calc_baseline_block_size(const uint8_t *eld)
397 return DRM_ELD_MONITOR_NAME_STRING - DRM_ELD_HEADER_BLOCK_SIZE +
398 drm_eld_mnl(eld) + drm_eld_sad_count(eld) * 3;
402 * drm_eld_size - Get ELD size in bytes
403 * @eld: pointer to a complete eld memory structure
405 * The returned value does not include the vendor block. It's vendor specific,
406 * and comprises of the remaining bytes in the ELD memory buffer after
407 * drm_eld_size() bytes of header and baseline block.
409 * The returned value is guaranteed to be a multiple of 4.
411 static inline int drm_eld_size(const uint8_t *eld)
413 return DRM_ELD_HEADER_BLOCK_SIZE + eld[DRM_ELD_BASELINE_ELD_LEN] * 4;
417 * drm_eld_get_conn_type - Get device type hdmi/dp connected
418 * @eld: pointer to an ELD memory structure
420 * The caller need to use %DRM_ELD_CONN_TYPE_HDMI or %DRM_ELD_CONN_TYPE_DP to
421 * identify the display type connected.
423 static inline u8 drm_eld_get_conn_type(const uint8_t *eld)
425 return eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_CONN_TYPE_MASK;
428 bool drm_probe_ddc(struct i2c_adapter *adapter);
429 struct edid *drm_do_get_edid(struct drm_connector *connector,
430 int (*get_edid_block)(void *data, u8 *buf, unsigned int block,
433 struct edid *drm_get_edid(struct drm_connector *connector,
434 struct i2c_adapter *adapter);
435 struct edid *drm_get_edid_switcheroo(struct drm_connector *connector,
436 struct i2c_adapter *adapter);
437 struct edid *drm_edid_duplicate(const struct edid *edid);
438 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid);
440 u8 drm_match_cea_mode(const struct drm_display_mode *to_match);
441 enum hdmi_picture_aspect drm_get_cea_aspect_ratio(const u8 video_code);
442 bool drm_detect_hdmi_monitor(struct edid *edid);
443 bool drm_detect_monitor_audio(struct edid *edid);
444 bool drm_rgb_quant_range_selectable(struct edid *edid);
445 int drm_add_modes_noedid(struct drm_connector *connector,
446 int hdisplay, int vdisplay);
447 void drm_set_preferred_mode(struct drm_connector *connector,
448 int hpref, int vpref);
450 int drm_edid_header_is_valid(const u8 *raw_edid);
451 bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid,
453 bool drm_edid_is_valid(struct edid *edid);
454 void drm_edid_get_monitor_name(struct edid *edid, char *name,
456 struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
457 int hsize, int vsize, int fresh,
460 #endif /* __DRM_EDID_H__ */