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37e1b12911
This allows to see the display in Screen preferences, and know its DPI and physical size (as much as EDID data can be trusted). This information could be used to compute the default font size, for example, so it's important that all drivers provide it whenever possible. Change-Id: Ic3d04e53cf5fcb24e22d35661d2b364a257947da Reviewed-on: https://review.haiku-os.org/c/haiku/+/6576 Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org> Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>
185 lines
3.6 KiB
C
185 lines
3.6 KiB
C
/*
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* Copyright 2003, Thomas Kurschel. All Rights Reserved.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _EDID_H
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#define _EDID_H
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//! Extended Display Identification Data (EDID)
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#include "edid_raw.h"
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// vendor info
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typedef struct {
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char manufacturer[4];
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uint16 prod_id;
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uint32 serial;
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uint8 week;
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uint16 year;
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} edid1_vendor;
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// version info
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typedef struct {
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uint8 version;
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uint8 revision;
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} edid1_version;
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// analog input parameters
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typedef struct {
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uint8 input_voltage; // 0=0.7V/0.3V, 1=0.714V/0.286,
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// 2=1V/0.4V, 3=0.7V/0V
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bool setup; // true if voltage configurable
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bool sep_sync;
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bool comp_sync;
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bool sync_on_green;
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bool sync_serr;
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} edid1_analog_params;
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// digital input parameters
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typedef struct {
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uint8 bit_depth;
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uint8 interface;
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} edid1_digital_params;
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// display info
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typedef struct {
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uint8 input_type;
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edid1_analog_params analog_params;
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edid1_digital_params digital_params;
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uint8 h_size;
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uint8 v_size;
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uint8 gamma; // (x+100)/100
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BBITFIELD8_7 (
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dpms_standby : 1,
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dpms_suspend : 1,
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dpms_off : 1,
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display_type : 2, // 0=mono, 1=rgb, 2=multicolour
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// since EDID version 1.1
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std_colour_space : 1,
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preferred_timing_mode : 1,
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gtf_supported : 1
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);
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uint16 red_x; // all colours are 0.10 fixed point
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uint16 red_y;
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uint16 green_x;
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uint16 green_y;
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uint16 blue_x;
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uint16 blue_y;
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uint16 white_x;
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uint16 white_y;
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} edid1_display;
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// standard timing data
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typedef struct {
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uint16 h_size;
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uint16 v_size;
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uint16 id;
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uint8 ratio;
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uint8 refresh;
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} edid1_std_timing;
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// additional whitepoint
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typedef struct {
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uint8 index;
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uint16 white_x;
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uint16 white_y;
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uint8 gamma; // (x+100)/100
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} edid1_whitepoint;
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// detailed timing description
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typedef struct {
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uint16 pixel_clock; // in 10 kHz
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uint16 h_active;
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uint16 h_blank;
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uint16 v_active;
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uint16 v_blank;
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uint16 h_sync_off;
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uint16 h_sync_width;
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uint16 v_sync_off;
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uint16 v_sync_width;
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uint16 h_size;
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uint16 v_size;
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uint16 h_border;
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uint16 v_border;
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BBITFIELD8_4 (
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interlaced : 1,
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stereo : 2, // upper bit set - left on sync
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// lower bit set - right on sync
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sync : 2,
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misc : 2
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);
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} edid1_detailed_timing;
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// detailed monitor description
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typedef struct {
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uint8 monitor_desc_type;
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union {
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char serial_number[EDID1_EXTRA_STRING_LEN];
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char ascii_data[EDID1_EXTRA_STRING_LEN];
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edid1_monitor_range monitor_range;
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char monitor_name[EDID1_EXTRA_STRING_LEN];
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edid1_whitepoint whitepoint[EDID1_NUM_EXTRA_WHITEPOINTS];
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edid1_std_timing std_timing[EDID1_NUM_EXTRA_STD_TIMING];
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edid1_detailed_timing detailed_timing;
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} data;
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} edid1_detailed_monitor;
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// CTA data block
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typedef struct cta_info {
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uint8 tag;
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uint8 revision;
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uint8 num_native_detailed;
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bool ycbcr422_supported;
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bool ycbcr444_supported;
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bool audio_supported;
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bool underscan;
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edid1_detailed_timing detailed_timing[6];
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uint8 num_data_blocks;
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cta_data_block data_blocks[8];
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} cta_info;
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// DisplayID data block
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typedef struct displayid_info {
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uint8 tag;
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uint8 version;
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uint8 extension_count;
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} displayid_info;
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// EDID data block
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typedef struct edid1_info {
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edid1_vendor vendor;
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edid1_version version;
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edid1_display display;
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edid1_established_timing established_timing;
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edid1_std_timing std_timing[EDID1_NUM_STD_TIMING];
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// since EDID version 1.2
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edid1_detailed_monitor detailed_monitor[EDID1_NUM_DETAILED_MONITOR_DESC];
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uint8 num_sections;
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// optional
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cta_info cta_block;
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displayid_info displayid_block;
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} edid1_info;
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#define EDID_VERSION_1 1
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#ifdef __cplusplus
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extern "C" {
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#endif
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void edid_decode(edid1_info *edid, const edid1_raw *raw);
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void edid_dump(edid1_info *edid);
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#ifdef __cplusplus
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}
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#endif
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#endif // _EDID_H
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