197 lines
6.9 KiB
C
197 lines
6.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#include <stdlib.h>
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#include <commonlib/bsd/helpers.h>
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struct edid_raw {
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uint8_t header[8];
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/* Display product identification */
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uint16_t manufacturer_id;
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uint16_t product_code;
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uint32_t serial_number;
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uint8_t manufacture_week;
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uint8_t manufacture_year;
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/* EDID version information */
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uint8_t edid_version;
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uint8_t edid_revision;
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/* Basic display parameters */
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uint8_t video_input_type;
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uint8_t horizontal_size; /* [cm] */
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uint8_t vertical_size; /* [cm] */
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uint8_t display_gamma;
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uint8_t supported_features;
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/* Color space definition */
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uint8_t color_characteristics[10];
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/* Timing information */
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uint8_t established_supported_timings[2];
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uint8_t manufacturers_reserved_timing;
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uint8_t standard_timings_supported[16];
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uint8_t descriptor_block_1[18];
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uint8_t descriptor_block_2[18];
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uint8_t descriptor_block_3[18];
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uint8_t descriptor_block_4[18];
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/* Number of optional 128-byte extension blocks */
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uint8_t extension_flag;
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uint8_t checksum;
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} __packed;
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_Static_assert(sizeof(struct edid_raw) == 128);
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#define EDID_HEADER_RAW { 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00 }
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#define EDID_HEADER_INVALID_RAW { 0, 0, 0, 0, 0, 0, 0, 0 }
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#define EDID_MANUFACTURER_ID 0xcb55
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#define EDID_MANUFACTURER_NAME "UNK"
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#define EDID_PRODUCT_CODE 0x1234
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#define EDID_SERIAL_NUMBER 0x56789ABC
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#define EDID_MANUFACTURE_WEEK 23u
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#define EDID_MANUFACTURE_NO_WEEK 0u
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#define EDID_MANUFACTURE_YEAR (2015u - 1990u)
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/* Video Input Definition for Analog Video Signal Interface */
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#define EDID_ANALOG_VSI (0u << 7)
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#define EDID_SIGNAL_LEVEL_0 0u
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#define EDID_SIGNAL_LEVEL_1 (1u << 5)
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#define EDID_SIGNAL_LEVEL_2 (2u << 5)
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#define EDID_SIGNAL_LEVEL_3 (3u << 5)
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#define EDID_VIDEO_SETUP_BLANK_EQ_BLACK 0u
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#define EDID_VIDEO_SETUP_BLANK_TO_BLACK (1u << 4)
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#define EDID_SEPARATE_SYNC_H_AND_V(v) ((v != 0 ? 0x1 : 0x0) << 3)
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#define EDID_COMPOSITE_SYNC_H(v) ((v != 0 ? 0x1 : 0x0) << 2)
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#define EDID_COMPOSITE_SYNC_ON_GREEN(v) ((v != 0 ? 0x1 : 0x0) << 1)
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#define EDID_SERRATION_VSYNC(v) (v != 0 ? 0x1 : 0x0)
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/* Video Input Definition for Digital Video Signal Interface */
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#define EDID_DIGITAL_VSI (1u << 7)
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#define EDID_COLOR_BIT_DEPTH_UNDEFINED 0u
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#define EDID_COLOR_BIT_DEPTH_6B (1u << 4)
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#define EDID_COLOR_BIT_DEPTH_8B (2u << 4)
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#define EDID_COLOR_BIT_DEPTH_10B (3u << 4)
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#define EDID_COLOR_BIT_DEPTH_12B (4u << 4)
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#define EDID_COLOR_BIT_DEPTH_14B (5u << 4)
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#define EDID_COLOR_BIT_DEPTH_16B (6u << 4)
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#define EDID_INTERFACE_UNDEFINED 0u
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#define EDID_INTERFACE_DVI 1u
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#define EDID_INTERFACE_HDMI_A 2u
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#define EDID_INTERFACE_HDMI_B 3u
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#define EDID_INTERFACE_MDDI 4u
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#define EDID_INTERFACE_DP 5u
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/* BEGIN Supported features */
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#define EDID_STANDBY_MODE(v) ((v != 0 ? 0x1 : 0x0) << 7)
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#define EDID_SUSPEND_MODE(v) ((v != 0 ? 0x1 : 0x0) << 6)
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#define EDID_ACTIVE_OFF(v) ((v != 0 ? 0x1 : 0x0) << 5)
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/* For analog interface */
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#define EDID_COLOR_TYPE_MONO 0u
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#define EDID_COLOR_TYPE_RGB (1u << 3)
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#define EDID_COLOR_TYPE_NON_RGB (2u << 3)
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#define EDID_COLOR_TYPE_UNDEFINED (3u << 3)
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/* For digital interface */
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#define EDID_COLOR_FORMAT_RGB444 0u
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#define EDID_COLOR_FORMAT_RGB444_YCRCB444 (1u << 3)
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#define EDID_COLOR_FORMAT_RGB444_YCRCB422 (2u << 3)
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#define EDID_COLOR_FORMAT_RGB444_YCRCB422_YCRCB422 (3u << 3)
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#define EDID_SRGB_SUPPORTED(v) (((v) == 0 ? 0u : 1u) << 2)
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#define EDID_PREFERRED_TIMING_EXTENDED_INFO (1u << 1)
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#define EDID_PREFERRED_TIMING_NO_EXTENDED_INFO 0u
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#define EDID_DISPLAY_FREQUENCY_CONTINUOUS 1u
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#define EDID_DISPLAY_FREQUENCY_NON_CONTINUOUS 0u
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/* END Supported features */
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/* Red X 0.640 */
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#define EDID_COLOR_R_X 0x25
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/* Red Y 0.330 */
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#define EDID_COLOR_R_Y 0x152
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/* Green X 0.300 */
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#define EDID_COLOR_G_X 0x13a
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/* Green Y 0.600 */
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#define EDID_COLOR_G_Y 0x267
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/* Blue X 0.150 */
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#define EDID_COLOR_B_X 0x9a
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/* Blue Y 0.060 */
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#define EDID_COLOR_B_Y 0x3e
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/* White X 0.3125 */
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#define EDID_COLOR_W_X 0xa
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/* White Y 0.3291 */
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#define EDID_COLOR_W_Y 0x22a
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/* 1 and 0 bits of each color */
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#define EDID_COLOR_R_X10_Y10 (((EDID_COLOR_R_X & 0x3) << 2) | (EDID_COLOR_R_Y & 0x3))
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#define EDID_COLOR_G_X10_Y10 (((EDID_COLOR_G_X & 0x3) << 2) | (EDID_COLOR_G_Y & 0x3))
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#define EDID_COLOR_B_X10_Y10 (((EDID_COLOR_B_X & 0x3) << 2) | (EDID_COLOR_B_Y & 0x3))
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#define EDID_COLOR_W_X10_Y10 (((EDID_COLOR_W_X & 0x3) << 2) | (EDID_COLOR_W_Y & 0x3))
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/* Concatenated 0 and 1 bits of each color. To be put
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* as first and second byte of color characteristic. */
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#define EDID_COLOR_RG_XY ((EDID_COLOR_R_X10_Y10 << 4) | EDID_COLOR_G_X10_Y10)
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#define EDID_COLOR_BW_XY ((EDID_COLOR_B_X10_Y10 << 4) | EDID_COLOR_W_X10_Y10)
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/* Bits 9 through 2 of each color */
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#define EDID_COLOR_R_X92 (EDID_COLOR_R_X >> 2)
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#define EDID_COLOR_R_Y92 (EDID_COLOR_R_Y >> 2)
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#define EDID_COLOR_G_X92 (EDID_COLOR_G_X >> 2)
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#define EDID_COLOR_G_Y92 (EDID_COLOR_G_Y >> 2)
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#define EDID_COLOR_B_X92 (EDID_COLOR_B_X >> 2)
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#define EDID_COLOR_B_Y92 (EDID_COLOR_B_Y >> 2)
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#define EDID_COLOR_W_X92 (EDID_COLOR_W_X >> 2)
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#define EDID_COLOR_W_Y92 (EDID_COLOR_W_Y >> 2)
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#define EDID_ESTABLISHED_TIMINGS_1_800x600_60Hz 1u
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#define EDID_ESTABLISHED_TIMINGS_1_800x600_56Hz (1u << 1)
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#define EDID_ESTABLISHED_TIMINGS_1_640x480_75Hz (1u << 2)
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#define EDID_ESTABLISHED_TIMINGS_1_640x480_72Hz (1u << 3)
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#define EDID_ESTABLISHED_TIMINGS_1_640x480_67Hz (1u << 4)
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#define EDID_ESTABLISHED_TIMINGS_1_640x480_60Hz (1u << 5)
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#define EDID_ESTABLISHED_TIMINGS_1_720x400_88Hz (1u << 6)
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#define EDID_ESTABLISHED_TIMINGS_1_720x400_70Hz (1u << 7)
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#define EDID_ESTABLISHED_TIMINGS_2_1280x1024_75Hz 1u
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#define EDID_ESTABLISHED_TIMINGS_2_1024x768_75Hz (1u << 1)
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#define EDID_ESTABLISHED_TIMINGS_2_1024x768_70Hz (1u << 2)
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#define EDID_ESTABLISHED_TIMINGS_2_1024x768_60Hz (1u << 3)
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#define EDID_ESTABLISHED_TIMINGS_2_1024x768_80HzI (1u << 4)
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#define EDID_ESTABLISHED_TIMINGS_2_832x624_75Hz (1u << 5)
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#define EDID_ESTABLISHED_TIMINGS_2_800x600_75Hz (1u << 6)
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#define EDID_ESTABLISHED_TIMINGS_2_800x600_72Hz (1u << 7)
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#define EDID_MANUFACTURERS_TIMINGS_1152x870_75Hz (1u << 7)
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#define EDID_HORIZONTAL_ACCESSIBLE_PIXELS(px) (((px) / 8 - 31) & 0xFF)
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#define EDID_ASPECT_RATIO_16_10 0u
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#define EDID_ASPECT_RATIO_4_3 (1u << 6)
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#define EDID_ASPECT_RATIO_5_4 (2u << 6)
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#define EDID_ASPECT_RATIO_16_9 (3u << 6)
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#define EDID_FIELD_REFRESH_RATE(hz) (((hz) - 60) & 0x1f)
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#define EDID_PIXEL_CLOCK(v) (((v) / 10000) & 0xFFFF)
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#define EDID_RAW_DEFAULT_PARAMS .header = EDID_HEADER_RAW, \
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.edid_version = 1, \
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.edid_revision = 4, \
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.manufacturer_id = EDID_MANUFACTURER_ID, \
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.product_code = EDID_PRODUCT_CODE, \
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.serial_number = EDID_SERIAL_NUMBER, \
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.manufacture_week = EDID_MANUFACTURE_NO_WEEK, \
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.manufacture_year = EDID_MANUFACTURE_YEAR, \
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.color_characteristics = { \
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EDID_COLOR_RG_XY, \
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EDID_COLOR_BW_XY, \
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EDID_COLOR_R_X92, \
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EDID_COLOR_R_Y92, \
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EDID_COLOR_G_X92, \
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EDID_COLOR_G_Y92, \
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EDID_COLOR_B_X92, \
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EDID_COLOR_B_Y92, \
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EDID_COLOR_W_X92, \
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EDID_COLOR_W_Y92, \
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}
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