83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
324 lines
11 KiB
C
324 lines
11 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (c) 2012 The Chromium OS Authors.
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*
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* (C) Copyright 2010
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* Petr Stetiar <ynezz@true.cz>
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*
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* Contains stolen code from ddcprobe project which is:
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* Copyright (C) Nalin Dahyabhai <bigfun@pobox.com>
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*/
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#ifndef __EDID_H_
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#define __EDID_H_
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#include <linux/types.h>
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/* Size of the EDID data */
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#define EDID_SIZE 128
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#define EDID_EXT_SIZE 256
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/* OUI of HDMI vendor specific data block */
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#define HDMI_IEEE_OUI 0x000c03
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#define GET_BIT(_x, _pos) \
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(((_x) >> (_pos)) & 1)
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#define GET_BITS(_x, _pos_msb, _pos_lsb) \
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(((_x) >> (_pos_lsb)) & ((1 << ((_pos_msb) - (_pos_lsb) + 1)) - 1))
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/* Aspect ratios used in EDID info. */
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enum edid_aspect {
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ASPECT_625 = 0,
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ASPECT_75,
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ASPECT_8,
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ASPECT_5625,
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};
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/* Detailed timing information used in EDID v1.x */
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struct edid_detailed_timing {
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unsigned char pixel_clock[2];
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#define EDID_DETAILED_TIMING_PIXEL_CLOCK(_x) \
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(((((uint32_t)(_x).pixel_clock[1]) << 8) + \
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(_x).pixel_clock[0]) * 10000)
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unsigned char horizontal_active;
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unsigned char horizontal_blanking;
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unsigned char horizontal_active_blanking_hi;
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#define EDID_DETAILED_TIMING_HORIZONTAL_ACTIVE(_x) \
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((GET_BITS((_x).horizontal_active_blanking_hi, 7, 4) << 8) + \
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(_x).horizontal_active)
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#define EDID_DETAILED_TIMING_HORIZONTAL_BLANKING(_x) \
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((GET_BITS((_x).horizontal_active_blanking_hi, 3, 0) << 8) + \
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(_x).horizontal_blanking)
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unsigned char vertical_active;
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unsigned char vertical_blanking;
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unsigned char vertical_active_blanking_hi;
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#define EDID_DETAILED_TIMING_VERTICAL_ACTIVE(_x) \
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((GET_BITS((_x).vertical_active_blanking_hi, 7, 4) << 8) + \
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(_x).vertical_active)
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#define EDID_DETAILED_TIMING_VERTICAL_BLANKING(_x) \
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((GET_BITS((_x).vertical_active_blanking_hi, 3, 0) << 8) + \
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(_x).vertical_blanking)
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unsigned char hsync_offset;
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unsigned char hsync_pulse_width;
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unsigned char vsync_offset_pulse_width;
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unsigned char hsync_vsync_offset_pulse_width_hi;
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#define EDID_DETAILED_TIMING_HSYNC_OFFSET(_x) \
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((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 7, 6) << 8) + \
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(_x).hsync_offset)
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#define EDID_DETAILED_TIMING_HSYNC_PULSE_WIDTH(_x) \
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((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 5, 4) << 8) + \
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(_x).hsync_pulse_width)
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#define EDID_DETAILED_TIMING_VSYNC_OFFSET(_x) \
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((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 3, 2) << 4) + \
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GET_BITS((_x).vsync_offset_pulse_width, 7, 4))
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#define EDID_DETAILED_TIMING_VSYNC_PULSE_WIDTH(_x) \
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((GET_BITS((_x).hsync_vsync_offset_pulse_width_hi, 1, 0) << 4) + \
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GET_BITS((_x).vsync_offset_pulse_width, 3, 0))
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unsigned char himage_size;
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unsigned char vimage_size;
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unsigned char himage_vimage_size_hi;
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#define EDID_DETAILED_TIMING_HIMAGE_SIZE(_x) \
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((GET_BITS((_x).himage_vimage_size_hi, 7, 4) << 8) + (_x).himage_size)
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#define EDID_DETAILED_TIMING_VIMAGE_SIZE(_x) \
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((GET_BITS((_x).himage_vimage_size_hi, 3, 0) << 8) + (_x).vimage_size)
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unsigned char hborder;
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unsigned char vborder;
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unsigned char flags;
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#define EDID_DETAILED_TIMING_FLAG_INTERLACED(_x) \
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GET_BIT((_x).flags, 7)
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#define EDID_DETAILED_TIMING_FLAG_STEREO(_x) \
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GET_BITS((_x).flags, 6, 5)
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#define EDID_DETAILED_TIMING_FLAG_DIGITAL_COMPOSITE(_x) \
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GET_BITS((_x).flags, 4, 3)
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#define EDID_DETAILED_TIMING_FLAG_POLARITY(_x) \
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GET_BITS((_x).flags, 2, 1)
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#define EDID_DETAILED_TIMING_FLAG_VSYNC_POLARITY(_x) \
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GET_BIT((_x).flags, 2)
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#define EDID_DETAILED_TIMING_FLAG_HSYNC_POLARITY(_x) \
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GET_BIT((_x).flags, 1)
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#define EDID_DETAILED_TIMING_FLAG_INTERLEAVED(_x) \
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GET_BIT((_x).flags, 0)
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} __attribute__ ((__packed__));
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enum edid_monitor_descriptor_types {
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EDID_MONITOR_DESCRIPTOR_SERIAL = 0xff,
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EDID_MONITOR_DESCRIPTOR_ASCII = 0xfe,
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EDID_MONITOR_DESCRIPTOR_RANGE = 0xfd,
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EDID_MONITOR_DESCRIPTOR_NAME = 0xfc,
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};
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struct edid_monitor_descriptor {
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uint16_t zero_flag_1;
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unsigned char zero_flag_2;
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unsigned char type;
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unsigned char zero_flag_3;
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union {
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char string[13];
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struct {
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unsigned char vertical_min;
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unsigned char vertical_max;
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unsigned char horizontal_min;
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unsigned char horizontal_max;
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unsigned char pixel_clock_max;
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unsigned char gtf_data[8];
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} range_data;
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} data;
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} __attribute__ ((__packed__));
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struct edid1_info {
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unsigned char header[8];
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unsigned char manufacturer_name[2];
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#define EDID1_INFO_MANUFACTURER_NAME_ZERO(_x) \
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GET_BIT(((_x).manufacturer_name[0]), 7)
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#define EDID1_INFO_MANUFACTURER_NAME_CHAR1(_x) \
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GET_BITS(((_x).manufacturer_name[0]), 6, 2)
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#define EDID1_INFO_MANUFACTURER_NAME_CHAR2(_x) \
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((GET_BITS(((_x).manufacturer_name[0]), 1, 0) << 3) + \
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GET_BITS(((_x).manufacturer_name[1]), 7, 5))
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#define EDID1_INFO_MANUFACTURER_NAME_CHAR3(_x) \
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GET_BITS(((_x).manufacturer_name[1]), 4, 0)
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unsigned char product_code[2];
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#define EDID1_INFO_PRODUCT_CODE(_x) \
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(((uint16_t)(_x).product_code[1] << 8) + (_x).product_code[0])
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unsigned char serial_number[4];
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#define EDID1_INFO_SERIAL_NUMBER(_x) \
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(((uint32_t)(_x).serial_number[3] << 24) + \
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((_x).serial_number[2] << 16) + ((_x).serial_number[1] << 8) + \
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(_x).serial_number[0])
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unsigned char week;
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unsigned char year;
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unsigned char version;
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unsigned char revision;
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unsigned char video_input_definition;
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#define EDID1_INFO_VIDEO_INPUT_DIGITAL(_x) \
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GET_BIT(((_x).video_input_definition), 7)
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#define EDID1_INFO_VIDEO_INPUT_VOLTAGE_LEVEL(_x) \
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GET_BITS(((_x).video_input_definition), 6, 5)
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#define EDID1_INFO_VIDEO_INPUT_BLANK_TO_BLACK(_x) \
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GET_BIT(((_x).video_input_definition), 4)
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#define EDID1_INFO_VIDEO_INPUT_SEPARATE_SYNC(_x) \
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GET_BIT(((_x).video_input_definition), 3)
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#define EDID1_INFO_VIDEO_INPUT_COMPOSITE_SYNC(_x) \
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GET_BIT(((_x).video_input_definition), 2)
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#define EDID1_INFO_VIDEO_INPUT_SYNC_ON_GREEN(_x) \
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GET_BIT(((_x).video_input_definition), 1)
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#define EDID1_INFO_VIDEO_INPUT_SERRATION_V(_x) \
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GET_BIT(((_x).video_input_definition), 0)
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unsigned char max_size_horizontal;
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unsigned char max_size_vertical;
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unsigned char gamma;
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unsigned char feature_support;
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#define EDID1_INFO_FEATURE_STANDBY(_x) \
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GET_BIT(((_x).feature_support), 7)
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#define EDID1_INFO_FEATURE_SUSPEND(_x) \
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GET_BIT(((_x).feature_support), 6)
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#define EDID1_INFO_FEATURE_ACTIVE_OFF(_x) \
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GET_BIT(((_x).feature_support), 5)
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#define EDID1_INFO_FEATURE_DISPLAY_TYPE(_x) \
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GET_BITS(((_x).feature_support), 4, 3)
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#define EDID1_INFO_FEATURE_RGB(_x) \
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GET_BIT(((_x).feature_support), 2)
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#define EDID1_INFO_FEATURE_PREFERRED_TIMING_MODE(_x) \
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GET_BIT(((_x).feature_support), 1)
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#define EDID1_INFO_FEATURE_DEFAULT_GTF_SUPPORT(_x) \
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GET_BIT(((_x).feature_support), 0)
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unsigned char color_characteristics[10];
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unsigned char established_timings[3];
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#define EDID1_INFO_ESTABLISHED_TIMING_720X400_70(_x) \
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GET_BIT(((_x).established_timings[0]), 7)
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#define EDID1_INFO_ESTABLISHED_TIMING_720X400_88(_x) \
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GET_BIT(((_x).established_timings[0]), 6)
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#define EDID1_INFO_ESTABLISHED_TIMING_640X480_60(_x) \
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GET_BIT(((_x).established_timings[0]), 5)
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#define EDID1_INFO_ESTABLISHED_TIMING_640X480_67(_x) \
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GET_BIT(((_x).established_timings[0]), 4)
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#define EDID1_INFO_ESTABLISHED_TIMING_640X480_72(_x) \
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GET_BIT(((_x).established_timings[0]), 3)
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#define EDID1_INFO_ESTABLISHED_TIMING_640X480_75(_x) \
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GET_BIT(((_x).established_timings[0]), 2)
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#define EDID1_INFO_ESTABLISHED_TIMING_800X600_56(_x) \
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GET_BIT(((_x).established_timings[0]), 1)
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#define EDID1_INFO_ESTABLISHED_TIMING_800X600_60(_x) \
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GET_BIT(((_x).established_timings[0]), 0)
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#define EDID1_INFO_ESTABLISHED_TIMING_800X600_72(_x) \
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GET_BIT(((_x).established_timings[1]), 7)
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#define EDID1_INFO_ESTABLISHED_TIMING_800X600_75(_x) \
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GET_BIT(((_x).established_timings[1]), 6)
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#define EDID1_INFO_ESTABLISHED_TIMING_832X624_75(_x) \
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GET_BIT(((_x).established_timings[1]), 5)
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#define EDID1_INFO_ESTABLISHED_TIMING_1024X768_87I(_x) \
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GET_BIT(((_x).established_timings[1]), 4)
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#define EDID1_INFO_ESTABLISHED_TIMING_1024X768_60(_x) \
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GET_BIT(((_x).established_timings[1]), 3)
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#define EDID1_INFO_ESTABLISHED_TIMING_1024X768_70(_x) \
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GET_BIT(((_x).established_timings[1]), 2)
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#define EDID1_INFO_ESTABLISHED_TIMING_1024X768_75(_x) \
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GET_BIT(((_x).established_timings[1]), 1)
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#define EDID1_INFO_ESTABLISHED_TIMING_1280X1024_75(_x) \
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GET_BIT(((_x).established_timings[1]), 0)
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#define EDID1_INFO_ESTABLISHED_TIMING_1152X870_75(_x) \
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GET_BIT(((_x).established_timings[2]), 7)
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struct {
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unsigned char xresolution;
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unsigned char aspect_vfreq;
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} __attribute__((__packed__)) standard_timings[8];
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#define EDID1_INFO_STANDARD_TIMING_XRESOLUTION(_x, _i) \
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(((_x).standard_timings[_i]).xresolution)
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#define EDID1_INFO_STANDARD_TIMING_ASPECT(_x, _i) \
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GET_BITS(((_x).standard_timings[_i].aspect_vfreq), 7, 6)
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#define EDID1_INFO_STANDARD_TIMING_VFREQ(_x, _i) \
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GET_BITS(((_x).standard_timings[_i].aspect_vfreq), 5, 0)
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union {
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unsigned char timing[72];
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struct edid_monitor_descriptor descriptor[4];
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} monitor_details;
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unsigned char extension_flag;
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unsigned char checksum;
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} __attribute__ ((__packed__));
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enum edid_cea861_db_types {
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EDID_CEA861_DB_AUDIO = 0x01,
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EDID_CEA861_DB_VIDEO = 0x02,
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EDID_CEA861_DB_VENDOR = 0x03,
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EDID_CEA861_DB_SPEAKER = 0x04,
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};
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struct edid_cea861_info {
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unsigned char extension_tag;
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#define EDID_CEA861_EXTENSION_TAG 0x02
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unsigned char revision;
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unsigned char dtd_offset;
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unsigned char dtd_count;
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#define EDID_CEA861_SUPPORTS_UNDERSCAN(_x) \
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GET_BIT(((_x).dtd_count), 7)
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#define EDID_CEA861_SUPPORTS_BASIC_AUDIO(_x) \
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GET_BIT(((_x).dtd_count), 6)
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#define EDID_CEA861_SUPPORTS_YUV444(_x) \
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GET_BIT(((_x).dtd_count), 5)
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#define EDID_CEA861_SUPPORTS_YUV422(_x) \
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GET_BIT(((_x).dtd_count), 4)
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#define EDID_CEA861_DTD_COUNT(_x) \
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GET_BITS(((_x).dtd_count), 3, 0)
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unsigned char data[124];
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#define EDID_CEA861_DB_TYPE(_x, offset) \
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GET_BITS((_x).data[offset], 7, 5)
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#define EDID_CEA861_DB_LEN(_x, offset) \
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GET_BITS((_x).data[offset], 4, 0)
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} __attribute__ ((__packed__));
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/**
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* Print the EDID info.
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*
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* @param edid_info The EDID info to be printed
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*/
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void edid_print_info(struct edid1_info *edid_info);
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/**
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* Check the EDID info.
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*
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* @param info The EDID info to be checked
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* @return 0 on valid, or -1 on invalid
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*/
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int edid_check_info(struct edid1_info *info);
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/**
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* Check checksum of a 128 bytes EDID data block
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*
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* @param edid_block EDID block data
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*
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* @return 0 on success, or a negative errno on error
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*/
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int edid_check_checksum(u8 *edid_block);
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/**
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* Get the horizontal and vertical rate ranges of the monitor.
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*
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* @param edid The EDID info
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* @param hmin Returns the minimum horizontal rate
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* @param hmax Returns the maxium horizontal rate
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* @param vmin Returns the minimum vertical rate
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* @param vmax Returns the maxium vertical rate
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* @return 0 on success, or -1 on error
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*/
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int edid_get_ranges(struct edid1_info *edid, unsigned int *hmin,
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unsigned int *hmax, unsigned int *vmin,
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unsigned int *vmax);
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struct display_timing;
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/**
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* edid_get_timing() - Get basic digital display parameters
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*
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* @param buf Buffer containing EDID data
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* @param buf_size Size of buffer in bytes
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* @param timing Place to put preferring timing information
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* @param panel_bits_per_colourp Place to put the number of bits per
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* colour supported by the panel. This will be set to
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* -1 if not available
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* @return 0 if timings are OK, -ve on error
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*/
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int edid_get_timing(u8 *buf, int buf_size, struct display_timing *timing,
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int *panel_bits_per_colourp);
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#endif /* __EDID_H_ */
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