edid.h File Reference

#include <stdint.h>
#include <framebuffer_info.h>
#include "commonlib/coreboot_tables.h"

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Data Structures
struct	edid_mode
struct	edid

Macros
#define	EDID_ASCII_STRING_LENGTH   13

Enumerations
enum	edid_modes {   EDID_MODE_640x480_60Hz , EDID_MODE_720x480_60Hz , EDID_MODE_1280x720_60Hz , EDID_MODE_1920x1080_60Hz ,   NUM_KNOWN_MODES , EDID_MODE_AUTO }
enum	edid_status { EDID_CONFORMANT , EDID_NOT_CONFORMANT , EDID_ABSENT }

Functions
int	decode_edid (unsigned char *edid, int size, struct edid *out)
void	edid_set_framebuffer_bits_per_pixel (struct edid *edid, int fb_bpp, int row_byte_alignment)
int	set_display_mode (struct edid *edid, enum edid_modes mode)

Macro Definition Documentation

EDID_ASCII_STRING_LENGTH

#define EDID_ASCII_STRING_LENGTH   13

Definition at line 47 of file edid.h.

Enumeration Type Documentation

edid_modes

enum edid_modes

Enumerator
EDID_MODE_640x480_60Hz
EDID_MODE_720x480_60Hz
EDID_MODE_1280x720_60Hz
EDID_MODE_1920x1080_60Hz
NUM_KNOWN_MODES
EDID_MODE_AUTO

Definition at line 10 of file edid.h.

edid_status

enum edid_status

Enumerator
EDID_CONFORMANT
EDID_NOT_CONFORMANT
EDID_ABSENT

Definition at line 89 of file edid.h.

Function Documentation

decode_edid()

int decode_edid	(	unsigned char *	edid,
		int	size,
		struct edid *	out
	)

According to E-EDID (EDIDv1.3), has_name_descriptor and has_range_descriptor are both required. These fields are optional in v1.4. However some v1.3 panels (Ex, B133XTN01.3) don't have them. As a workaround, we only print warning messages.

Definition at line 1104 of file edid.c.

References __fallthrough, BIOS_ERR, BIOS_SPEW, BIOS_WARNING, c, detailed_block(), do_checksum(), dump_breakdown(), EDID_ABSENT, EDID_CONFORMANT, EDID_NOT_CONFORMANT, established_timings, extra_info, known_modes, manufacturer_name(), edid::manufacturer_name, memcmp(), memset(), edid::mode_is_supported, NUM_KNOWN_MODES, edid::panel_bits_per_color, edid::panel_bits_per_pixel, parse_extension(), printk, refresh, sync, voltage, x, and y.

Referenced by anx7625_dp_get_edid(), ast_select_mode(), dptx_get_edid(), gma_func0_init(), intel_gma_init_lvds(), ps8640_get_edid(), rk_edp_read_edid(), rk_hdmi_get_edid(), and tegra_dp_update_config().

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edid_set_framebuffer_bits_per_pixel()

void edid_set_framebuffer_bits_per_pixel	(	struct edid *	edid,
		int	fb_bpp,
		int	row_byte_alignment
	)

Definition at line 1667 of file edid.c.

References ALIGN_UP, assert, edid::bytes_per_line, DIV_ROUND_UP, edid::framebuffer_bits_per_pixel, edid_mode::ha, MAX, edid::mode, edid_mode::va, edid::x_resolution, and edid::y_resolution.

Referenced by configure_display(), detailed_block(), display_startup(), and rk_display_init().

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set_display_mode()

int set_display_mode	(	struct edid *	edid,
		enum edid_modes	mode
	)

Definition at line 1081 of file edid.c.

References BIOS_DEBUG, BIOS_ERR, EDID_MODE_AUTO, known_modes, edid::mode, edid::mode_is_supported, name, and printk.

Referenced by rk_hdmi_get_edid().

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