diff options
Diffstat (limited to 'lib/igt_edid.h')
| -rw-r--r-- | lib/igt_edid.h | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/lib/igt_edid.h b/lib/igt_edid.h new file mode 100644 index 00000000..bbcb939a --- /dev/null +++ b/lib/igt_edid.h @@ -0,0 +1,196 @@ +/* + * Copyright © 2019 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + * + * Authors: Simon Ser <simon.ser@intel.com> + */ + +#ifndef IGT_EDID_H +#define IGT_EDID_H + +#include "config.h" + +#include <stdint.h> + +struct est_timings { + uint8_t t1; + uint8_t t2; + uint8_t mfg_rsvd; +} __attribute__((packed)); + +#define STD_TIMINGS_LEN 8 + +enum std_timing_aspect { + STD_TIMING_16_10 = 0b00, + STD_TIMING_4_3 = 0b01, + STD_TIMING_5_4 = 0b10, + STD_TIMING_16_9 = 0b11, +}; + +struct std_timing { + uint8_t hsize; + uint8_t vfreq_aspect; +} __attribute__((packed)); + +#define DETAILED_TIMINGS_LEN 4 + +#define EDID_PT_HSYNC_POSITIVE (1 << 1) +#define EDID_PT_VSYNC_POSITIVE (1 << 2) +#define EDID_PT_SEPARATE_SYNC (3 << 3) +#define EDID_PT_STEREO (1 << 5) +#define EDID_PT_INTERLACED (1 << 7) + +struct detailed_pixel_timing { + uint8_t hactive_lo; + uint8_t hblank_lo; + uint8_t hactive_hblank_hi; + uint8_t vactive_lo; + uint8_t vblank_lo; + uint8_t vactive_vblank_hi; + uint8_t hsync_offset_lo; + uint8_t hsync_pulse_width_lo; + uint8_t vsync_offset_pulse_width_lo; + uint8_t hsync_vsync_offset_pulse_width_hi; + uint8_t width_mm_lo; + uint8_t height_mm_lo; + uint8_t width_height_mm_hi; + uint8_t hborder; + uint8_t vborder; + uint8_t misc; +} __attribute__((packed)); + +struct detailed_data_string { + char str[13]; +} __attribute__((packed)); + +struct detailed_data_monitor_range { + uint8_t min_vfreq; + uint8_t max_vfreq; + uint8_t min_hfreq_khz; + uint8_t max_hfreq_khz; + uint8_t pixel_clock_mhz; /* need to multiply by 10 */ + uint8_t flags; + union { + char pad[7]; + struct { + uint8_t reserved; + uint8_t hfreq_start_khz; /* need to multiply by 2 */ + uint8_t c; /* need to divide by 2 */ + uint8_t m[2]; + uint8_t k; + uint8_t j; /* need to divide by 2 */ + } __attribute__((packed)) gtf2; + struct { + uint8_t version; + uint8_t data1; /* high 6 bits: extra clock resolution */ + uint8_t data2; /* plus low 2 of above: max hactive */ + uint8_t supported_aspects; + uint8_t flags; /* preferred aspect and blanking support */ + uint8_t supported_scalings; + uint8_t preferred_refresh; + } __attribute__((packed)) cvt; + } formula; +} __attribute__((packed)); + +enum detailed_non_pixel_type { + EDID_DETAIL_EST_TIMINGS = 0xf7, + EDID_DETAIL_CVT_3BYTE = 0xf8, + EDID_DETAIL_COLOR_MGMT_DATA = 0xf9, + EDID_DETAIL_STD_MODES = 0xfa, + EDID_DETAIL_MONITOR_CPDATA = 0xfb, + EDID_DETAIL_MONITOR_NAME = 0xfc, + EDID_DETAIL_MONITOR_RANGE = 0xfd, + EDID_DETAIL_MONITOR_STRING = 0xfe, + EDID_DETAIL_MONITOR_SERIAL = 0xff, +}; + +struct detailed_non_pixel { + uint8_t pad1; + uint8_t type; /* enum detailed_non_pixel_type */ + uint8_t pad2; + union { + struct detailed_data_string str; + struct detailed_data_monitor_range range; + struct detailed_data_string string; + /* TODO: other types */ + } data; +} __attribute__((packed)); + +struct detailed_timing { + uint8_t pixel_clock[2]; /* need to multiply by 10 KHz, zero if not a pixel timing */ + union { + struct detailed_pixel_timing pixel_data; + struct detailed_non_pixel other_data; + } data; +} __attribute__((packed)); + +struct edid { + char header[8]; + /* Vendor & product info */ + uint8_t mfg_id[2]; + uint8_t prod_code[2]; + uint8_t serial[4]; + uint8_t mfg_week; + uint8_t mfg_year; + /* EDID version */ + uint8_t version; + uint8_t revision; + /* Display info: */ + uint8_t input; + uint8_t width_cm; + uint8_t height_cm; + uint8_t gamma; + uint8_t features; + /* Color characteristics */ + uint8_t red_green_lo; + uint8_t black_white_lo; + uint8_t red_x; + uint8_t red_y; + uint8_t green_x; + uint8_t green_y; + uint8_t blue_x; + uint8_t blue_y; + uint8_t white_x; + uint8_t white_y; + /* Est. timings and mfg rsvd timings*/ + struct est_timings established_timings; + /* Standard timings 1-8*/ + struct std_timing standard_timings[STD_TIMINGS_LEN]; + /* Detailing timings 1-4 */ + struct detailed_timing detailed_timings[DETAILED_TIMINGS_LEN]; + /* Number of 128 byte ext. blocks */ + uint8_t extensions; + /* Checksum */ + uint8_t checksum; +} __attribute__((packed)); + +void edid_init(struct edid *edid); +void edid_init_with_mode(struct edid *edid, drmModeModeInfo *mode); +void edid_update_checksum(struct edid *edid); +void detailed_timing_set_mode(struct detailed_timing *dt, drmModeModeInfo *mode, + int width_mm, int height_mm); +void detailed_timing_set_monitor_range_mode(struct detailed_timing *dt, + drmModeModeInfo *mode); +void detailed_timing_set_string(struct detailed_timing *dt, + enum detailed_non_pixel_type type, + const char *str); + +#endif |