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/*
* 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
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