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
  28 #define EDID_LENGTH 128
  29 #define DDC_ADDR 0x50
  30
  31 #define CEA_EXT     0x02
  32 #define VTB_EXT     0x10
  33 #define DI_EXT      0x40
  34 #define LS_EXT      0x50
  35 #define MI_EXT      0x60
  36
  37 struct est_timings {
  38         u8 t1;
  39         u8 t2;
  40         u8 mfg_rsvd;
  41 } __attribute__((packed));
  42
  43 /* 00=16:10, 01=4:3, 10=5:4, 11=16:9 */
  44 #define EDID_TIMING_ASPECT_SHIFT 6
  45 #define EDID_TIMING_ASPECT_MASK  (0x3 << EDID_TIMING_ASPECT_SHIFT)
  46
  47 /* need to add 60 */
  48 #define EDID_TIMING_VFREQ_SHIFT  0
  49 #define EDID_TIMING_VFREQ_MASK   (0x3f << EDID_TIMING_VFREQ_SHIFT)
  50
  51 struct std_timing {
  52         u8 hsize; /* need to multiply by 8 then add 248 */
  53         u8 vfreq_aspect;
  54 } __attribute__((packed));
  55
  56 #define DRM_EDID_PT_HSYNC_POSITIVE (1 << 1)
  57 #define DRM_EDID_PT_VSYNC_POSITIVE (1 << 2)
  58 #define DRM_EDID_PT_SEPARATE_SYNC  (3 << 3)
  59 #define DRM_EDID_PT_STEREO         (1 << 5)
  60 #define DRM_EDID_PT_INTERLACED     (1 << 7)
  61
  62 /* If detailed data is pixel timing */
  63 struct detailed_pixel_timing {
  64         u8 hactive_lo;
  65         u8 hblank_lo;
  66         u8 hactive_hblank_hi;
  67         u8 vactive_lo;
  68         u8 vblank_lo;
  69         u8 vactive_vblank_hi;
  70         u8 hsync_offset_lo;
  71         u8 hsync_pulse_width_lo;
  72         u8 vsync_offset_pulse_width_lo;
  73         u8 hsync_vsync_offset_pulse_width_hi;
  74         u8 width_mm_lo;
  75         u8 height_mm_lo;
  76         u8 width_height_mm_hi;
  77         u8 hborder;
  78         u8 vborder;
  79         u8 misc;
  80 } __attribute__((packed));
  81
  82 /* If it's not pixel timing, it'll be one of the below */
  83 struct detailed_data_string {
  84         u8 str[13];
  85 } __attribute__((packed));
  86
  87 struct detailed_data_monitor_range {
  88         u8 min_vfreq;
  89         u8 max_vfreq;
  90         u8 min_hfreq_khz;
  91         u8 max_hfreq_khz;
  92         u8 pixel_clock_mhz; /* need to multiply by 10 */
  93         u8 flags;
  94         union {
  95                 struct {
  96                         u8 reserved;
  97                         u8 hfreq_start_khz; /* need to multiply by 2 */
  98                         u8 c; /* need to divide by 2 */
  99                         __le16 m;
 100                         u8 k;
 101                         u8 j; /* need to divide by 2 */
 102                 } __attribute__((packed)) gtf2;
 103                 struct {
 104                         u8 version;
 105                         u8 data1; /* high 6 bits: extra clock resolution */
 106                         u8 data2; /* plus low 2 of above: max hactive */
 107                         u8 supported_aspects;
 108                         u8 flags; /* preferred aspect and blanking support */
 109                         u8 supported_scalings;
 110                         u8 preferred_refresh;
 111                 } __attribute__((packed)) cvt;
 112         } formula;
 113 } __attribute__((packed));
 114
 115 struct detailed_data_wpindex {
 116         u8 white_yx_lo; /* Lower 2 bits each */
 117         u8 white_x_hi;
 118         u8 white_y_hi;
 119         u8 gamma; /* need to divide by 100 then add 1 */
 120 } __attribute__((packed));
 121
 122 struct detailed_data_color_point {
 123         u8 windex1;
 124         u8 wpindex1[3];
 125         u8 windex2;
 126         u8 wpindex2[3];
 127 } __attribute__((packed));
 128
 129 struct cvt_timing {
 130         u8 code[3];
 131 } __attribute__((packed));
 132
 133 struct detailed_non_pixel {
 134         u8 pad1;
 135         u8 type; /* ff=serial, fe=string, fd=monitor range, fc=monitor name
 136                     fb=color point data, fa=standard timing data,
 137                     f9=undefined, f8=mfg. reserved */
 138         u8 pad2;
 139         union {
 140                 struct detailed_data_string str;
 141                 struct detailed_data_monitor_range range;
 142                 struct detailed_data_wpindex color;
 143                 struct std_timing timings[6];
 144                 struct cvt_timing cvt[4];
 145         } data;
 146 } __attribute__((packed));
 147
 148 #define EDID_DETAIL_EST_TIMINGS 0xf7
 149 #define EDID_DETAIL_CVT_3BYTE 0xf8
 150 #define EDID_DETAIL_COLOR_MGMT_DATA 0xf9
 151 #define EDID_DETAIL_STD_MODES 0xfa
 152 #define EDID_DETAIL_MONITOR_CPDATA 0xfb
 153 #define EDID_DETAIL_MONITOR_NAME 0xfc
 154 #define EDID_DETAIL_MONITOR_RANGE 0xfd
 155 #define EDID_DETAIL_MONITOR_STRING 0xfe
 156 #define EDID_DETAIL_MONITOR_SERIAL 0xff
 157
 158 struct detailed_timing {
 159         __le16 pixel_clock; /* need to multiply by 10 KHz */
 160         union {
 161                 struct detailed_pixel_timing pixel_data;
 162                 struct detailed_non_pixel other_data;
 163         } data;
 164 } __attribute__((packed));
 165
 166 #define DRM_EDID_INPUT_SERRATION_VSYNC (1 << 0)
 167 #define DRM_EDID_INPUT_SYNC_ON_GREEN   (1 << 1)
 168 #define DRM_EDID_INPUT_COMPOSITE_SYNC  (1 << 2)
 169 #define DRM_EDID_INPUT_SEPARATE_SYNCS  (1 << 3)
 170 #define DRM_EDID_INPUT_BLANK_TO_BLACK  (1 << 4)
 171 #define DRM_EDID_INPUT_VIDEO_LEVEL     (3 << 5)
 172 #define DRM_EDID_INPUT_DIGITAL         (1 << 7)
 173 #define DRM_EDID_DIGITAL_DEPTH_MASK    (7 << 4)
 174 #define DRM_EDID_DIGITAL_DEPTH_UNDEF   (0 << 4)
 175 #define DRM_EDID_DIGITAL_DEPTH_6       (1 << 4)
 176 #define DRM_EDID_DIGITAL_DEPTH_8       (2 << 4)
 177 #define DRM_EDID_DIGITAL_DEPTH_10      (3 << 4)
 178 #define DRM_EDID_DIGITAL_DEPTH_12      (4 << 4)
 179 #define DRM_EDID_DIGITAL_DEPTH_14      (5 << 4)
 180 #define DRM_EDID_DIGITAL_DEPTH_16      (6 << 4)
 181 #define DRM_EDID_DIGITAL_DEPTH_RSVD    (7 << 4)
 182 #define DRM_EDID_DIGITAL_TYPE_UNDEF    (0)
 183 #define DRM_EDID_DIGITAL_TYPE_DVI      (1)
 184 #define DRM_EDID_DIGITAL_TYPE_HDMI_A   (2)
 185 #define DRM_EDID_DIGITAL_TYPE_HDMI_B   (3)
 186 #define DRM_EDID_DIGITAL_TYPE_MDDI     (4)
 187 #define DRM_EDID_DIGITAL_TYPE_DP       (5)
 188
 189 #define DRM_EDID_FEATURE_DEFAULT_GTF      (1 << 0)
 190 #define DRM_EDID_FEATURE_PREFERRED_TIMING (1 << 1)
 191 #define DRM_EDID_FEATURE_STANDARD_COLOR   (1 << 2)
 192 /* If analog */
 193 #define DRM_EDID_FEATURE_DISPLAY_TYPE     (3 << 3) /* 00=mono, 01=rgb, 10=non-rgb, 11=unknown */
 194 /* If digital */
 195 #define DRM_EDID_FEATURE_COLOR_MASK       (3 << 3)
 196 #define DRM_EDID_FEATURE_RGB              (0 << 3)
 197 #define DRM_EDID_FEATURE_RGB_YCRCB444     (1 << 3)
 198 #define DRM_EDID_FEATURE_RGB_YCRCB422     (2 << 3)
 199 #define DRM_EDID_FEATURE_RGB_YCRCB        (3 << 3) /* both 4:4:4 and 4:2:2 */
 200
 201 #define DRM_EDID_FEATURE_PM_ACTIVE_OFF    (1 << 5)
 202 #define DRM_EDID_FEATURE_PM_SUSPEND       (1 << 6)
 203 #define DRM_EDID_FEATURE_PM_STANDBY       (1 << 7)
 204
 205 struct edid {
 206         u8 header[8];
 207         /* Vendor & product info */
 208         u8 mfg_id[2];
 209         u8 prod_code[2];
 210         u32 serial; /* FIXME: byte order */
 211         u8 mfg_week;
 212         u8 mfg_year;
 213         /* EDID version */
 214         u8 version;
 215         u8 revision;
 216         /* Display info: */
 217         u8 input;
 218         u8 width_cm;
 219         u8 height_cm;
 220         u8 gamma;
 221         u8 features;
 222         /* Color characteristics */
 223         u8 red_green_lo;
 224         u8 black_white_lo;
 225         u8 red_x;
 226         u8 red_y;
 227         u8 green_x;
 228         u8 green_y;
 229         u8 blue_x;
 230         u8 blue_y;
 231         u8 white_x;
 232         u8 white_y;
 233         /* Est. timings and mfg rsvd timings*/
 234         struct est_timings established_timings;
 235         /* Standard timings 1-8*/
 236         struct std_timing standard_timings[8];
 237         /* Detailing timings 1-4 */
 238         struct detailed_timing detailed_timings[4];
 239         /* Number of 128 byte ext. blocks */
 240         u8 extensions;
 241         /* Checksum */
 242         u8 checksum;
 243 } __attribute__((packed));
 244
 245 #define EDID_PRODUCT_ID(e) ((e)->prod_code[0] | ((e)->prod_code[1] << 8))
 246
 247 /* Short Audio Descriptor */
 248 struct cea_sad {
 249         u8 format;
 250         u8 channels; /* max number of channels - 1 */
 251         u8 freq;
 252         u8 byte2; /* meaning depends on format */
 253 };
 254
 255 struct drm_encoder;
 256 struct drm_connector;
 257 struct drm_display_mode;
 258 struct hdmi_avi_infoframe;
 259 struct hdmi_vendor_infoframe;
 260
 261 void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid);
 262 int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads);
 263 int drm_edid_to_speaker_allocation(struct edid *edid, u8 **sadb);
 264 int drm_av_sync_delay(struct drm_connector *connector,
 265                       struct drm_display_mode *mode);
 266 struct drm_connector *drm_select_eld(struct drm_encoder *encoder,
 267                                      struct drm_display_mode *mode);
 268 int drm_load_edid_firmware(struct drm_connector *connector);
 269
 270 int
 271 drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame,
 272                                          const struct drm_display_mode *mode);
 273 int
 274 drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame,
 275                                             const struct drm_display_mode *mode);
 276
 277 #endif /* __DRM_EDID_H__ */