LXR linux/include/drm/drm

   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/* ELD Header Block */
 233#define DRM_ELD_HEADER_BLOCK_SIZE       4
 234
 235#define DRM_ELD_VER                     0
 236# define DRM_ELD_VER_SHIFT              3
 237# define DRM_ELD_VER_MASK               (0x1f << 3)
 238# define DRM_ELD_VER_CEA861D            (2 << 3) /* supports 861D or below */
 239# define DRM_ELD_VER_CANNED             (0x1f << 3)
 240
 241#define DRM_ELD_BASELINE_ELD_LEN        2       /* in dwords! */
 242
 243/* ELD Baseline Block for ELD_Ver == 2 */
 244#define DRM_ELD_CEA_EDID_VER_MNL        4
 245# define DRM_ELD_CEA_EDID_VER_SHIFT     5
 246# define DRM_ELD_CEA_EDID_VER_MASK      (7 << 5)
 247# define DRM_ELD_CEA_EDID_VER_NONE      (0 << 5)
 248# define DRM_ELD_CEA_EDID_VER_CEA861    (1 << 5)
 249# define DRM_ELD_CEA_EDID_VER_CEA861A   (2 << 5)
 250# define DRM_ELD_CEA_EDID_VER_CEA861BCD (3 << 5)
 251# define DRM_ELD_MNL_SHIFT              0
 252# define DRM_ELD_MNL_MASK               (0x1f << 0)
 253
 254#define DRM_ELD_SAD_COUNT_CONN_TYPE     5
 255# define DRM_ELD_SAD_COUNT_SHIFT        4
 256# define DRM_ELD_SAD_COUNT_MASK         (0xf << 4)
 257# define DRM_ELD_CONN_TYPE_SHIFT        2
 258# define DRM_ELD_CONN_TYPE_MASK         (3 << 2)
 259# define DRM_ELD_CONN_TYPE_HDMI         (0 << 2)
 260# define DRM_ELD_CONN_TYPE_DP           (1 << 2)
 261# define DRM_ELD_SUPPORTS_AI            (1 << 1)
 262# define DRM_ELD_SUPPORTS_HDCP          (1 << 0)
 263
 264#define DRM_ELD_AUD_SYNCH_DELAY         6       /* in units of 2 ms */
 265# define DRM_ELD_AUD_SYNCH_DELAY_MAX    0xfa    /* 500 ms */
 266
 267#define DRM_ELD_SPEAKER                 7
 268# define DRM_ELD_SPEAKER_MASK           0x7f
 269# define DRM_ELD_SPEAKER_RLRC           (1 << 6)
 270# define DRM_ELD_SPEAKER_FLRC           (1 << 5)
 271# define DRM_ELD_SPEAKER_RC             (1 << 4)
 272# define DRM_ELD_SPEAKER_RLR            (1 << 3)
 273# define DRM_ELD_SPEAKER_FC             (1 << 2)
 274# define DRM_ELD_SPEAKER_LFE            (1 << 1)
 275# define DRM_ELD_SPEAKER_FLR            (1 << 0)
 276
 277#define DRM_ELD_PORT_ID                 8       /* offsets 8..15 inclusive */
 278# define DRM_ELD_PORT_ID_LEN            8
 279
 280#define DRM_ELD_MANUFACTURER_NAME0      16
 281#define DRM_ELD_MANUFACTURER_NAME1      17
 282
 283#define DRM_ELD_PRODUCT_CODE0           18
 284#define DRM_ELD_PRODUCT_CODE1           19
 285
 286#define DRM_ELD_MONITOR_NAME_STRING     20      /* offsets 20..(20+mnl-1) inclusive */
 287
 288#define DRM_ELD_CEA_SAD(mnl, sad)       (20 + (mnl) + 3 * (sad))
 289
 290struct edid {
 291        u8 header[8];
 292        /* Vendor & product info */
 293        u8 mfg_id[2];
 294        u8 prod_code[2];
 295        u32 serial; /* FIXME: byte order */
 296        u8 mfg_week;
 297        u8 mfg_year;
 298        /* EDID version */
 299        u8 version;
 300        u8 revision;
 301        /* Display info: */
 302        u8 input;
 303        u8 width_cm;
 304        u8 height_cm;
 305        u8 gamma;
 306        u8 features;
 307        /* Color characteristics */
 308        u8 red_green_lo;
 309        u8 black_white_lo;
 310        u8 red_x;
 311        u8 red_y;
 312        u8 green_x;
 313        u8 green_y;
 314        u8 blue_x;
 315        u8 blue_y;
 316        u8 white_x;
 317        u8 white_y;
 318        /* Est. timings and mfg rsvd timings*/
 319        struct est_timings established_timings;
 320        /* Standard timings 1-8*/
 321        struct std_timing standard_timings[8];
 322        /* Detailing timings 1-4 */
 323        struct detailed_timing detailed_timings[4];
 324        /* Number of 128 byte ext. blocks */
 325        u8 extensions;
 326        /* Checksum */
 327        u8 checksum;
 328} __attribute__((packed));
 329
 330#define EDID_PRODUCT_ID(e) ((e)->prod_code[0] | ((e)->prod_code[1] << 8))
 331
 332/* Short Audio Descriptor */
 333struct cea_sad {
 334        u8 format;
 335        u8 channels; /* max number of channels - 1 */
 336        u8 freq;
 337        u8 byte2; /* meaning depends on format */
 338};
 339
 340struct drm_encoder;
 341struct drm_connector;
 342struct drm_connector_state;
 343struct drm_display_mode;
 344
 345int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads);
 346int drm_edid_to_speaker_allocation(struct edid *edid, u8 **sadb);
 347int drm_av_sync_delay(struct drm_connector *connector,
 348                      const struct drm_display_mode *mode);
 349
 350#ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
 351struct edid *drm_load_edid_firmware(struct drm_connector *connector);
 352int __drm_set_edid_firmware_path(const char *path);
 353int __drm_get_edid_firmware_path(char *buf, size_t bufsize);
 354#else
 355static inline struct edid *
 356drm_load_edid_firmware(struct drm_connector *connector)
 357{
 358        return ERR_PTR(-ENOENT);
 359}
 360#endif
 361
 362bool drm_edid_are_equal(const struct edid *edid1, const struct edid *edid2);
 363
 364int
 365drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame,
 366                                         const struct drm_connector *connector,
 367                                         const struct drm_display_mode *mode);
 368int
 369drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame,
 370                                            const struct drm_connector *connector,
 371                                            const struct drm_display_mode *mode);
 372
 373void
 374drm_hdmi_avi_infoframe_colorspace(struct hdmi_avi_infoframe *frame,
 375                                  const struct drm_connector_state *conn_state);
 376
 377void
 378drm_hdmi_avi_infoframe_bars(struct hdmi_avi_infoframe *frame,
 379                            const struct drm_connector_state *conn_state);
 380
 381void
 382drm_hdmi_avi_infoframe_quant_range(struct hdmi_avi_infoframe *frame,
 383                                   const struct drm_connector *connector,
 384                                   const struct drm_display_mode *mode,
 385                                   enum hdmi_quantization_range rgb_quant_range);
 386
 387int
 388drm_hdmi_infoframe_set_hdr_metadata(struct hdmi_drm_infoframe *frame,
 389                                    const struct drm_connector_state *conn_state);
 390
 391int
 392drm_hdmi_infoframe_set_gen_hdr_metadata(struct hdmi_drm_infoframe *frame,
 393                                        const struct drm_connector_state *conn_state);
 394
 395/**
 396 * drm_eld_mnl - Get ELD monitor name length in bytes.
 397 * @eld: pointer to an eld memory structure with mnl set
 398 */
 399static inline int drm_eld_mnl(const uint8_t *eld)
 400{
 401        return (eld[DRM_ELD_CEA_EDID_VER_MNL] & DRM_ELD_MNL_MASK) >> DRM_ELD_MNL_SHIFT;
 402}
 403
 404/**
 405 * drm_eld_sad - Get ELD SAD structures.
 406 * @eld: pointer to an eld memory structure with sad_count set
 407 */
 408static inline const uint8_t *drm_eld_sad(const uint8_t *eld)
 409{
 410        unsigned int ver, mnl;
 411
 412        ver = (eld[DRM_ELD_VER] & DRM_ELD_VER_MASK) >> DRM_ELD_VER_SHIFT;
 413        if (ver != 2 && ver != 31)
 414                return NULL;
 415
 416        mnl = drm_eld_mnl(eld);
 417        if (mnl > 16)
 418                return NULL;
 419
 420        return eld + DRM_ELD_CEA_SAD(mnl, 0);
 421}
 422
 423/**
 424 * drm_eld_sad_count - Get ELD SAD count.
 425 * @eld: pointer to an eld memory structure with sad_count set
 426 */
 427static inline int drm_eld_sad_count(const uint8_t *eld)
 428{
 429        return (eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_SAD_COUNT_MASK) >>
 430                DRM_ELD_SAD_COUNT_SHIFT;
 431}
 432
 433/**
 434 * drm_eld_calc_baseline_block_size - Calculate baseline block size in bytes
 435 * @eld: pointer to an eld memory structure with mnl and sad_count set
 436 *
 437 * This is a helper for determining the payload size of the baseline block, in
 438 * bytes, for e.g. setting the Baseline_ELD_Len field in the ELD header block.
 439 */
 440static inline int drm_eld_calc_baseline_block_size(const uint8_t *eld)
 441{
 442        return DRM_ELD_MONITOR_NAME_STRING - DRM_ELD_HEADER_BLOCK_SIZE +
 443                drm_eld_mnl(eld) + drm_eld_sad_count(eld) * 3;
 444}
 445
 446/**
 447 * drm_eld_size - Get ELD size in bytes
 448 * @eld: pointer to a complete eld memory structure
 449 *
 450 * The returned value does not include the vendor block. It's vendor specific,
 451 * and comprises of the remaining bytes in the ELD memory buffer after
 452 * drm_eld_size() bytes of header and baseline block.
 453 *
 454 * The returned value is guaranteed to be a multiple of 4.
 455 */
 456static inline int drm_eld_size(const uint8_t *eld)
 457{
 458        return DRM_ELD_HEADER_BLOCK_SIZE + eld[DRM_ELD_BASELINE_ELD_LEN] * 4;
 459}
 460
 461/**
 462 * drm_eld_get_spk_alloc - Get speaker allocation
 463 * @eld: pointer to an ELD memory structure
 464 *
 465 * The returned value is the speakers mask. User has to use %DRM_ELD_SPEAKER
 466 * field definitions to identify speakers.
 467 */
 468static inline u8 drm_eld_get_spk_alloc(const uint8_t *eld)
 469{
 470        return eld[DRM_ELD_SPEAKER] & DRM_ELD_SPEAKER_MASK;
 471}
 472
 473/**
 474 * drm_eld_get_conn_type - Get device type hdmi/dp connected
 475 * @eld: pointer to an ELD memory structure
 476 *
 477 * The caller need to use %DRM_ELD_CONN_TYPE_HDMI or %DRM_ELD_CONN_TYPE_DP to
 478 * identify the display type connected.
 479 */
 480static inline u8 drm_eld_get_conn_type(const uint8_t *eld)
 481{
 482        return eld[DRM_ELD_SAD_COUNT_CONN_TYPE] & DRM_ELD_CONN_TYPE_MASK;
 483}
 484
 485bool drm_probe_ddc(struct i2c_adapter *adapter);
 486struct edid *drm_do_get_edid(struct drm_connector *connector,
 487        int (*get_edid_block)(void *data, u8 *buf, unsigned int block,
 488                              size_t len),
 489        void *data);
 490struct edid *drm_get_edid(struct drm_connector *connector,
 491                          struct i2c_adapter *adapter);
 492struct edid *drm_get_edid_switcheroo(struct drm_connector *connector,
 493                                     struct i2c_adapter *adapter);
 494struct edid *drm_edid_duplicate(const struct edid *edid);
 495int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid);
 496int drm_add_override_edid_modes(struct drm_connector *connector);
 497
 498u8 drm_match_cea_mode(const struct drm_display_mode *to_match);
 499bool drm_detect_hdmi_monitor(struct edid *edid);
 500bool drm_detect_monitor_audio(struct edid *edid);
 501enum hdmi_quantization_range
 502drm_default_rgb_quant_range(const struct drm_display_mode *mode);
 503int drm_add_modes_noedid(struct drm_connector *connector,
 504                         int hdisplay, int vdisplay);
 505void drm_set_preferred_mode(struct drm_connector *connector,
 506                            int hpref, int vpref);
 507
 508int drm_edid_header_is_valid(const u8 *raw_edid);
 509bool drm_edid_block_valid(u8 *raw_edid, int block, bool print_bad_edid,
 510                          bool *edid_corrupt);
 511bool drm_edid_is_valid(struct edid *edid);
 512void drm_edid_get_monitor_name(struct edid *edid, char *name,
 513                               int buflen);
 514struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev,
 515                                           int hsize, int vsize, int fresh,
 516                                           bool rb);
 517struct drm_display_mode *
 518drm_display_mode_from_cea_vic(struct drm_device *dev,
 519                              u8 video_code);
 520
 521#endif /* __DRM_EDID_H__ */
 522