include/drm/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 #include <drm/drm_mode.h>
  29
  30 struct drm_device;
  31 struct 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
  44 struct 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
  58 struct 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 */
  70 struct 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 */
  90 struct detailed_data_string {
  91         u8 str[13];
  92 } __attribute__((packed));
  93
  94 struct detailed_data_monitor_range {
  95         u8 min_vfreq;
  96         u8 max_vfreq;
  97         u8 min_hfreq_khz;
  98         u8 max_hfreq_khz;
  99         u8 pixel_clock_mhz; /* need to multiply by 10 */
 100         u8 flags;
 101         union {
 102                 struct {
 103                         u8 reserved;
 104                         u8 hfreq_start_khz; /* need to multiply by 2 */
 105                         u8 c; /* need to divide by 2 */
 106                         __le16 m;
 107                         u8 k;
 108                         u8 j; /* need to divide by 2 */
 109                 } __attribute__((packed)) gtf2;
 110                 struct {
 111                         u8 version;
 112                         u8 data1; /* high 6 bits: extra clock resolution */
 113                         u8 data2; /* plus low 2 of above: max hactive */
 114                         u8 supported_aspects;
 115                         u8 flags; /* preferred aspect and blanking support */
 116                         u8 supported_scalings;
 117                         u8 preferred_refresh;
 118                 } __attribute__((packed)) cvt;
 119         } formula;
 120 } __attribute__((packed));
 121
 122 struct detailed_data_wpindex {
 123         u8 white_yx_lo; /* Lower 2 bits each */
 124         u8 white_x_hi;
 125         u8 white_y_hi;
 126         u8 gamma; /* need to divide by 100 then add 1 */
 127 } __attribute__((packed));
 128
 129 struct detailed_data_color_point {
 130         u8 windex1;
 131         u8 wpindex1[3];
 132         u8 windex2;
 133         u8 wpindex2[3];
 134 } __attribute__((packed));
 135
 136 struct cvt_timing {
 137         u8 code[3];
 138 } __attribute__((packed));
 139
 140 struct detailed_non_pixel {
 141         u8 pad1;
 142         u8 type; /* ff=serial, fe=string, fd=monitor range, fc=monitor name
 143                     fb=color point data, fa=standard timing data,
 144                     f9=undefined, f8=mfg. reserved */
 145         u8 pad2;
 146         union {
 147                 struct detailed_data_string str;
 148                 struct detailed_data_monitor_range range;
 149                 struct detailed_data_wpindex color;
 150                 struct std_timing timings[6];
 151                 struct cvt_timing cvt[4];
 152         } data;
 153 } __attribute__((packed));
 154
 155 #define EDID_DETAIL_EST_TIMINGS 0xf7
 156 #define EDID_DETAIL_CVT_3BYTE 0xf8
 157 #define EDID_DETAIL_COLOR_MGMT_DATA 0xf9
 158 #define EDID_DETAIL_STD_MODES 0xfa
 159 #define EDID_DETAIL_MONITOR_CPDATA 0xfb
 160 #define EDID_DETAIL_MONITOR_NAME 0xfc
 161 #define EDID_DETAIL_MONITOR_RANGE 0xfd
 162 #define EDID_DETAIL_MONITOR_STRING 0xfe
 163 #define EDID_DETAIL_MONITOR_SERIAL 0xff
 164
 165 struct detailed_timing {
 166         __le16 pixel_clock; /* need to multiply by 10 KHz */
 167         union {
 168                 struct detailed_pixel_timing pixel_data;
 169                 struct detailed_non_pixel other_data;
 170         } data;
 171 } __attribute__((packed));
 172
 173 #define DRM_EDID_INPUT_SERRATION_VSYNC (1 << 0)
 174 #define DRM_EDID_INPUT_SYNC_ON_GREEN   (1 << 1)
 175 #define DRM_EDID_INPUT_COMPOSITE_SYNC  (1 << 2)
 176 #define DRM_EDID_INPUT_SEPARATE_SYNCS  (1 << 3)
 177 #define DRM_EDID_INPUT_BLANK_TO_BLACK  (1 << 4)
 178 #define DRM_EDID_INPUT_VIDEO_LEVEL     (3 << 5)
 179 #define DRM_EDID_INPUT_DIGITAL         (1 << 7)
 180 #define DRM_EDID_DIGITAL_DEPTH_MASK    (7 << 4) /* 1.4 */
 181 #define DRM_EDID_DIGITAL_DEPTH_UNDEF   (0 << 4) /* 1.4 */
 182 #define DRM_EDID_DIGITAL_DEPTH_6       (1 << 4) /* 1.4 */
 183 #define DRM_EDID_DIGITAL_DEPTH_8       (2 << 4) /* 1.4 */
 184 #define DRM_EDID_DIGITAL_DEPTH_10      (3 << 4) /* 1.4 */
 185 #define DRM_EDID_DIGITAL_DEPTH_12      (4 << 4) /* 1.4 */
 186 #define DRM_EDID_DIGITAL_DEPTH_14      (5 << 4) /* 1.4 */
 187 #define DRM_EDID_DIGITAL_DEPTH_16      (6 << 4) /* 1.4 */
 188 #define DRM_EDID_DIGITAL_DEPTH_RSVD    (7 << 4) /* 1.4 */
 189 #define DRM_EDID_DIGITAL_TYPE_MASK     (7 << 0) /* 1.4 */
 190 #define DRM_EDID_DIGITAL_TYPE_UNDEF    (0 << 0) /* 1.4 */
 191 #define DRM_EDID_DIGITAL_TYPE_DVI      (1 << 0) /* 1.4 */
 192 #define DRM_EDID_DIGITAL_TYPE_HDMI_A   (2 << 0) /* 1.4 */
 193 #define DRM_EDID_DIGITAL_TYPE_HDMI_B   (3 << 0) /* 1.4 */
 194 #define DRM_EDID_DIGITAL_TYPE_MDDI     (4 << 0) /* 1.4 */
 195 #define DRM_EDID_DIGITAL_TYPE_DP       (5 << 0) /* 1.4 */
 196 #define DRM_EDID_DIGITAL_DFP_1_X       (1 << 0) /* 1.3 */
 197
 198 #define DRM_EDID_FEATURE_DEFAULT_GTF      (1 << 0)
 199 #define DRM_EDID_FEATURE_PREFERRED_TIMING (1 << 1)
 200 #define DRM_EDID_FEATURE_STANDARD_COLOR   (1 << 2)
 201 /* If analog */
 202 #define DRM_EDID_FEATURE_DISPLAY_TYPE     (3 << 3) /* 00=mono, 01=rgb, 10=non-rgb, 11=unknown */
 203 /* If digital */
 204 #define DRM_EDID_FEATURE_COLOR_MASK       (3 << 3)
 205 #define DRM_EDID_FEATURE_RGB              (0 << 3)
 206 #define DRM_EDID_FEATURE_RGB_YCRCB444     (1 << 3)
 207 #define DRM_EDID_FEATURE_RGB_YCRCB422     (2 << 3)
 208 #define DRM_EDID_FEATURE_RGB_YCRCB        (3 << 3) /* both 4:4:4 and 4:2:2 */
 209
 210 #define DRM_EDID_FEATURE_PM_ACTIVE_OFF    (1 << 5)
 211 #define DRM_EDID_FEATURE_PM_SUSPEND       (1 << 6)
 212 #define DRM_EDID_FEATURE_PM_STANDBY       (1 << 7)
 213
 214 #define DRM_EDID_HDMI_DC_48               (1 << 6)
 215 #define DRM_EDID_HDMI_DC_36               (1 << 5)
 216 #define DRM_EDID_HDMI_DC_30               (1 << 4)
 217 #define DRM_EDID_HDMI_DC_Y444             (1 << 3)
 218
 219 /* YCBCR 420 deep color modes */
 220 #define DRM_EDID_YCBCR420_DC_48           (1 << 2)
 221 #define DRM_EDID_YCBCR420_DC_36           (1 << 1)
 222 #define DRM_EDID_YCBCR420_DC_30           (1 << 0)
 223 #define DRM_EDID_YCBCR420_DC_MASK (DRM_EDID_YCBCR420_DC_48 | \
 224                                     DRM_EDID_YCBCR420_DC_36 | \
 225                                     DRM_EDID_YCBCR420_DC_30)
 226
 227 /* ELD Header Block */
 228 #define DRM_ELD_HEADER_BLOCK_SIZE       4
 229
 230 #define DRM_ELD_VER                     0
 231 # define DRM_ELD_VER_SHIFT              3
 232 # define DRM_ELD_VER_MASK               (0x1f << 3)
 233 # define DRM_ELD_VER_CEA861D            (2 << 3) /* supports 861D or below */
 234 # define DRM_ELD_VER_CANNED             (0x1f << 3)
 235
 236 #define DRM_ELD_BASELINE_ELD_LEN        2       /* in dwords! */
 237
 238 /* ELD Baseline Block for ELD_Ver == 2 */
 239 #define DRM_ELD_CEA_EDID_VER_MNL        4
 240 # define DRM_ELD_CEA_EDID_VER_SHIFT     5
 241 # define DRM_ELD_CEA_EDID_VER_MASK      (7 << 5)
 242 # define DRM_ELD_CEA_EDID_VER_NONE      (0 << 5)
 243 # define DRM_ELD_CEA_EDID_VER_CEA861    (1 << 5)
 244 # define DRM_ELD_CEA_EDID_VER_CEA861A   (2 << 5)
 245 # define DRM_ELD_CEA_EDID_VER_CEA861BCD (3 << 5)
 246 # define DRM_ELD_MNL_SHIFT              0
 247 # define DRM_ELD_MNL_MASK               (0x1f << 0)
 248
 249 #define DRM_ELD_SAD_COUNT_CONN_TYPE     5
 250 # define DRM_ELD_SAD_COUNT_SHIFT        4
 251 # define DRM_ELD_SAD_COUNT_MASK         (0xf << 4)
 252 # define DRM_ELD_CONN_TYPE_SHIFT        2
 253 # define DRM_ELD_CONN_TYPE_MASK         (3 << 2)
 254 # define DRM_ELD_CONN_TYPE_HDMI         (0 << 2)
 255 # define DRM_ELD_CONN_TYPE_DP           (1 << 2)
 256 # define DRM_ELD_SUPPORTS_AI            (1 << 1)
 257 # define DRM_ELD_SUPPORTS_HDCP          (1 << 0)
 258
 259 #define DRM_ELD_AUD_SYNCH_DELAY         6       /* in units of 2 ms */
 260 # define DRM_ELD_AUD_SYNCH_DELAY_MAX    0xfa    /* 500 ms */
 261
 262 #define DRM_ELD_SPEAKER                 7
 263 # define DRM_ELD_SPEAKER_MASK           0x7f
 264 # define DRM_ELD_SPEAKER_RLRC           (1 << 6)
 265 # define DRM_ELD_SPEAKER_FLRC           (1 << 5)
 266 # define DRM_ELD_SPEAKER_RC             (1 << 4)
 267 # define DRM_ELD_SPEAKER_RLR            (1 << 3)
 268 # define DRM_ELD_SPEAKER_FC             (1 << 2)
 269 # define DRM_ELD_SPEAKER_LFE            (1 << 1)
 270 # define DRM_ELD_SPEAKER_FLR            (1 << 0)
 271
 272 #define DRM_ELD_PORT_ID                 8       /* offsets 8..15 inclusive */
 273 # define DRM_ELD_PORT_ID_LEN            8
 274
 275 #define DRM_ELD_MANUFACTURER_NAME0      16
 276 #define DRM_ELD_MANUFACTURER_NAME1      17
 277
 278 #define DRM_ELD_PRODUCT_CODE0           18
 279 #define DRM_ELD_PRODUCT_CODE1           19
 280
 281 #define DRM_ELD_MONITOR_NAME_STRING     20      /* offsets 20..(20+mnl-1) inclusive */
 282
 283 #define DRM_ELD_CEA_SAD(mnl, sad)       (20 + (mnl) + 3 * (sad))
 284
 285 struct edid {
 286         u8 header[8];
 287         /* Vendor & product info */
 288         u8 mfg_id[2];
 289         u8 prod_code[2];
 290         u32 serial; /* FIXME: byte order */
 291         u8 mfg_week;
 292         u8 mfg_year;
 293         /* EDID version */
 294         u8 version;
 295         u8 revision;
 296         /* Display info: */
 297         u8 input;
 298         u8 width_cm;
 299         u8 height_cm;
 300         u8 gamma;
 301         u8 features;
 302         /* Color characteristics */
 303         u8 red_green_lo;
 304         u8 black_white_lo;
 305         u8 red_x;
 306         u8 red_y;
 307         u8 green_x;
 308         u8 green_y;
 309         u8 blue_x;
 310         u8 blue_y;
 311         u8 white_x;
 312         u8 white_y;
 313         /* Est. timings and mfg rsvd timings*/
 314         struct est_timings established_timings;
 315         /* Standard timings 1-8*/
 316         struct std_timing standard_timings[8];
 317         /* Detailing timings 1-4 */
 318         struct detailed_timing detailed_timings[4];
 319         /* Number of 128 byte ext. blocks */
 320         u8 extensions;
 321         /* Checksum */
 322         u8 checksum;
 323 } __attribute__((packed));
 324
 325 #define EDID_PRODUCT_ID(e) ((e)->prod_code[0] | ((e)->prod_code[1] << 8))
 326
 327 /* Short Audio Descriptor */
 328 struct cea_sad {
 329         u8 format;
 330         u8 channels; /* max number of channels - 1 */
 331         u8 freq;
 332         u8 byte2; /* meaning depends on format */
 333 };
 334
 335 struct drm_encoder;
 336 struct drm_connector;
 337 struct drm_connector_state;
 338 struct drm_display_mode;
 339
 340 int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads);
 341 int drm_edid_to_speaker_allocation(struct edid *edid, u8 **sadb);
 342 int drm_av_sync_delay(struct drm_connector *connector,
 343                       const struct drm_display_mode *mode);
 344
 345 #ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
 346 struct edid *drm_load_edid_firmware(struct drm_connector *connector);
 347 int __drm_set_edid_firmware_path(const char *path);
 348 int __drm_get_edid_firmware_path(char *buf, size_t bufsize);
 349 #else
 350 static inline struct edid *
 351 drm_load_edid_firmware(struct drm_connector *connector)
 352 {
 353         return ERR_PTR(-ENOENT);
 354 }
 355 #endif
 356
 357 int
 358 drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame,
 359                                          struct drm_connector *connector,
 360                                          const struct drm_display_mode *mode);
 361 int
 362 drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame,
 363                                             struct drm_connector *connector,
 364                                             const struct drm_display_mode *mode);
 365
 366 void
 367 drm_hdmi_avi_infoframe_colorspace(struct hdmi_avi_infoframe *frame,
 368                                   const struct drm_connector_state *conn_state);
 369
 370 void
 371 drm_hdmi_avi_infoframe_bars(struct hdmi_avi_infoframe *frame,
 372                             const struct drm_connector_state *conn_state);
 373
 374 void
 375 drm_hdmi_avi_infoframe_quant_range(struct hdmi_avi_infoframe *frame,
 376                                    struct drm_connector *connector,
 377                                    const struct drm_display_mode *mode,
 378                                    enum hdmi_quantization_range rgb_quant_range);
 379
 380 int
 381 drm_hdmi_infoframe_set_hdr_metadata(struct hdmi_drm_infoframe *frame,
 382                                     const struct drm_connector_state *conn_state);
 383
 384 /**
 385  * drm_eld_mnl - Get ELD monitor name length in bytes.
 386  * @eld: pointer to an eld memory structure with mnl set
 387  */
 388 static inline int drm_eld_mnl(const uint8_t *eld)
 389 {
 390         return (eld[DRM_ELD_CEA_EDID_VER_MNL] & DRM_ELD_MNL_MASK) >> DRM_ELD_MNL_SHIFT;
 391 }
 392
 393 /**
 394  * drm_eld_sad - Get ELD SAD structures.
 395  * @eld: pointer to an eld memory structure with sad_count set
 396  */
 397 static inline const uint8_t *drm_eld_sad(const uint8_t *eld)
 398 {
 399         unsigned int ver, mnl;
 400
 401         ver = (eld[DRM_ELD_VER] & DRM_ELD_VER_MASK) >> DRM_ELD_VER_SHIFT;
 402         if (ver != 2 && ver != 31)
 403                 return NULL;
 404
 405         mnl = drm_eld_mnl(eld);
 406         if (mnl > 16)
 407                 return NULL;
 408
 409         return eld + DRM_ELD_CEA_SAD(mnl, 0);
 410 }
 411
 412 /**
 413  * drm_eld_sad_count - Get ELD SAD count.
 414  * @eld: pointer to an eld memory structure with sad_count set
 415  */
 416 static inline int drm_eld_sad_count(const uint8_t *eld)
 417 {
 418         return (eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_SAD_COUNT_MASK) >>
 419                 DRM_ELD_SAD_COUNT_SHIFT;
 420 }
 421
 422 /**
 423  * drm_eld_calc_baseline_block_size - Calculate baseline block size in bytes
 424  * @eld: pointer to an eld memory structure with mnl and sad_count set
 425  *
 426  * This is a helper for determining the payload size of the baseline block, in
 427  * bytes, for e.g. setting the Baseline_ELD_Len field in the ELD header block.
 428  */
 429 static inline int drm_eld_calc_baseline_block_size(const uint8_t *eld)
 430 {
 431         return DRM_ELD_MONITOR_NAME_STRING - DRM_ELD_HEADER_BLOCK_SIZE +
 432                 drm_eld_mnl(eld) + drm_eld_sad_count(eld) * 3;
 433 }
 434
 435 /**
 436  * drm_eld_size - Get ELD size in bytes
 437  * @eld: pointer to a complete eld memory structure
 438  *
 439  * The returned value does not include the vendor block. It's vendor specific,
 440  * and comprises of the remaining bytes in the ELD memory buffer after
 441  * drm_eld_size() bytes of header and baseline block.
 442  *
 443  * The returned value is guaranteed to be a multiple of 4.
 444  */
 445 static inline int drm_eld_size(const uint8_t *eld)
 446 {
 447         return DRM_ELD_HEADER_BLOCK_SIZE + eld[DRM_ELD_BASELINE_ELD_LEN] * 4;
 448 }
 449
 450 /**
 451  * drm_eld_get_spk_alloc - Get speaker allocation
 452  * @eld: pointer to an ELD memory structure
 453  *
 454  * The returned value is the speakers mask. User has to use %DRM_ELD_SPEAKER
 455  * field definitions to identify speakers.
 456  */
 457 static inline u8 drm_eld_get_spk_alloc(const uint8_t *eld)
 458 {
 459         return eld[DRM_ELD_SPEAKER] & DRM_ELD_SPEAKER_MASK;
 460 }
 461
 462 /**
 463  * drm_eld_get_conn_type - Get device type hdmi/dp connected
 464  * @eld: pointer to an ELD memory structure
 465  *
 466  * The caller need to use %DRM_ELD_CONN_TYPE_HDMI or %DRM_ELD_CONN_TYPE_DP to
 467  * identify the display type connected.
 468  */
 469 static inline u8 drm_eld_get_conn_type(const uint8_t *eld)
 470 {
 471         return eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_CONN_TYPE_MASK;
 472 }
 473
 474 bool drm_probe_ddc(struct i2c_adapter *adapter);
 475 struct edid *drm_do_get_edid(struct drm_connector *connector,
 476         int (*get_edid_block)(void *data, u8 *buf, unsigned int block,
 477                               size_t len),
 478         void *data);
 479 struct edid *drm_get_edid(struct drm_connector *connector,
 480                           struct i2c_adapter *adapter);
 481 struct edid *drm_get_edid_switcheroo(struct drm_connector *connector,
 482                                      struct i2c_adapter *adapter);
 483 struct edid *drm_edid_duplicate(const struct edid *edid);
 484 int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid);
 485 int drm_add_override_edid_modes(struct drm_connector *connector);
 486
 487 u8 drm_match_cea_mode(const struct drm_display_mode *to_match);
 488 bool drm_detect_hdmi_monitor(struct edid *edid);
 489 bool drm_detect_monitor_audio(struct edid *edid);
 490 enum hdmi_quantization_range
 491 drm_default_rgb_quant_range(const struct drm_display_mode *mode);
 492 int drm_add_modes_noedid(struct drm_connector *connector,
 493                          int hdisplay, int vdisplay);
 494 void drm_set_preferred_mode(struct drm_connector *connector,
 495                             int hpref, int vpref);
 496
 497 int drm_edid_header_is_valid(const u8 *raw_edid);
 498 bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid,
 499                           bool *edid_corrupt);
 500 bool drm_edid_is_valid(struct edid *edid);
 501 void drm_edid_get_monitor_name(struct edid *edid, char *name,
 502                                int buflen);
 503 struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
 504                                            int hsize, int vsize, int fresh,
 505                                            bool rb);
 506 #endif /* __DRM_EDID_H__ */