tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright © 2014 Red Hat Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 */
22#ifndef DRM_DISPLAYID_H
23#define DRM_DISPLAYID_H
24
25#include <linux/types.h>
26
27struct edid;
28
29#define DATA_BLOCK_PRODUCT_ID 0x00
30#define DATA_BLOCK_DISPLAY_PARAMETERS 0x01
31#define DATA_BLOCK_COLOR_CHARACTERISTICS 0x02
32#define DATA_BLOCK_TYPE_1_DETAILED_TIMING 0x03
33#define DATA_BLOCK_TYPE_2_DETAILED_TIMING 0x04
34#define DATA_BLOCK_TYPE_3_SHORT_TIMING 0x05
35#define DATA_BLOCK_TYPE_4_DMT_TIMING 0x06
36#define DATA_BLOCK_VESA_TIMING 0x07
37#define DATA_BLOCK_CEA_TIMING 0x08
38#define DATA_BLOCK_VIDEO_TIMING_RANGE 0x09
39#define DATA_BLOCK_PRODUCT_SERIAL_NUMBER 0x0a
40#define DATA_BLOCK_GP_ASCII_STRING 0x0b
41#define DATA_BLOCK_DISPLAY_DEVICE_DATA 0x0c
42#define DATA_BLOCK_INTERFACE_POWER_SEQUENCING 0x0d
43#define DATA_BLOCK_TRANSFER_CHARACTERISTICS 0x0e
44#define DATA_BLOCK_DISPLAY_INTERFACE 0x0f
45#define DATA_BLOCK_STEREO_DISPLAY_INTERFACE 0x10
46#define DATA_BLOCK_TILED_DISPLAY 0x12
47#define DATA_BLOCK_CTA 0x81
48
49#define DATA_BLOCK_VENDOR_SPECIFIC 0x7f
50
51#define PRODUCT_TYPE_EXTENSION 0
52#define PRODUCT_TYPE_TEST 1
53#define PRODUCT_TYPE_PANEL 2
54#define PRODUCT_TYPE_MONITOR 3
55#define PRODUCT_TYPE_TV 4
56#define PRODUCT_TYPE_REPEATER 5
57#define PRODUCT_TYPE_DIRECT_DRIVE 6
58
59struct displayid_header {
60 u8 rev;
61 u8 bytes;
62 u8 prod_id;
63 u8 ext_count;
64} __packed;
65
66struct displayid_block {
67 u8 tag;
68 u8 rev;
69 u8 num_bytes;
70} __packed;
71
72struct displayid_tiled_block {
73 struct displayid_block base;
74 u8 tile_cap;
75 u8 topo[3];
76 u8 tile_size[4];
77 u8 tile_pixel_bezel[5];
78 u8 topology_id[8];
79} __packed;
80
81struct displayid_detailed_timings_1 {
82 u8 pixel_clock[3];
83 u8 flags;
84 u8 hactive[2];
85 u8 hblank[2];
86 u8 hsync[2];
87 u8 hsw[2];
88 u8 vactive[2];
89 u8 vblank[2];
90 u8 vsync[2];
91 u8 vsw[2];
92} __packed;
93
94struct displayid_detailed_timing_block {
95 struct displayid_block base;
96 struct displayid_detailed_timings_1 timings[];
97};
98
99/* DisplayID iteration */
100struct displayid_iter {
101 const struct edid *edid;
102
103 const u8 *section;
104 int length;
105 int idx;
106 int ext_index;
107};
108
109void displayid_iter_edid_begin(const struct edid *edid,
110 struct displayid_iter *iter);
111const struct displayid_block *
112__displayid_iter_next(struct displayid_iter *iter);
113#define displayid_iter_for_each(__block, __iter) \
114 while (((__block) = __displayid_iter_next(__iter)))
115void displayid_iter_end(struct displayid_iter *iter);
116
117#endif