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
23#ifndef __DRM_DISPLAYID_INTERNAL_H__
24#define __DRM_DISPLAYID_INTERNAL_H__
25
26#include <linux/types.h>
27#include <linux/bits.h>
28
29struct drm_edid;
30
31#define VESA_IEEE_OUI 0x3a0292
32
33/* DisplayID Structure versions */
34#define DISPLAY_ID_STRUCTURE_VER_20 0x20
35
36/* DisplayID Structure v1r2 Data Blocks */
37#define DATA_BLOCK_PRODUCT_ID 0x00
38#define DATA_BLOCK_DISPLAY_PARAMETERS 0x01
39#define DATA_BLOCK_COLOR_CHARACTERISTICS 0x02
40#define DATA_BLOCK_TYPE_1_DETAILED_TIMING 0x03
41#define DATA_BLOCK_TYPE_2_DETAILED_TIMING 0x04
42#define DATA_BLOCK_TYPE_3_SHORT_TIMING 0x05
43#define DATA_BLOCK_TYPE_4_DMT_TIMING 0x06
44#define DATA_BLOCK_VESA_TIMING 0x07
45#define DATA_BLOCK_CEA_TIMING 0x08
46#define DATA_BLOCK_VIDEO_TIMING_RANGE 0x09
47#define DATA_BLOCK_PRODUCT_SERIAL_NUMBER 0x0a
48#define DATA_BLOCK_GP_ASCII_STRING 0x0b
49#define DATA_BLOCK_DISPLAY_DEVICE_DATA 0x0c
50#define DATA_BLOCK_INTERFACE_POWER_SEQUENCING 0x0d
51#define DATA_BLOCK_TRANSFER_CHARACTERISTICS 0x0e
52#define DATA_BLOCK_DISPLAY_INTERFACE 0x0f
53#define DATA_BLOCK_STEREO_DISPLAY_INTERFACE 0x10
54#define DATA_BLOCK_TILED_DISPLAY 0x12
55#define DATA_BLOCK_VENDOR_SPECIFIC 0x7f
56#define DATA_BLOCK_CTA 0x81
57
58/* DisplayID Structure v2r0 Data Blocks */
59#define DATA_BLOCK_2_PRODUCT_ID 0x20
60#define DATA_BLOCK_2_DISPLAY_PARAMETERS 0x21
61#define DATA_BLOCK_2_TYPE_7_DETAILED_TIMING 0x22
62#define DATA_BLOCK_2_TYPE_8_ENUMERATED_TIMING 0x23
63#define DATA_BLOCK_2_TYPE_9_FORMULA_TIMING 0x24
64#define DATA_BLOCK_2_DYNAMIC_VIDEO_TIMING 0x25
65#define DATA_BLOCK_2_DISPLAY_INTERFACE_FEATURES 0x26
66#define DATA_BLOCK_2_STEREO_DISPLAY_INTERFACE 0x27
67#define DATA_BLOCK_2_TILED_DISPLAY_TOPOLOGY 0x28
68#define DATA_BLOCK_2_CONTAINER_ID 0x29
69#define DATA_BLOCK_2_TYPE_10_FORMULA_TIMING 0x2a
70#define DATA_BLOCK_2_VENDOR_SPECIFIC 0x7e
71#define DATA_BLOCK_2_CTA_DISPLAY_ID 0x81
72
73/* DisplayID Structure v1r2 Product Type */
74#define PRODUCT_TYPE_EXTENSION 0
75#define PRODUCT_TYPE_TEST 1
76#define PRODUCT_TYPE_PANEL 2
77#define PRODUCT_TYPE_MONITOR 3
78#define PRODUCT_TYPE_TV 4
79#define PRODUCT_TYPE_REPEATER 5
80#define PRODUCT_TYPE_DIRECT_DRIVE 6
81
82/* DisplayID Structure v2r0 Display Product Primary Use Case (~Product Type) */
83#define PRIMARY_USE_EXTENSION 0
84#define PRIMARY_USE_TEST 1
85#define PRIMARY_USE_GENERIC 2
86#define PRIMARY_USE_TV 3
87#define PRIMARY_USE_DESKTOP_PRODUCTIVITY 4
88#define PRIMARY_USE_DESKTOP_GAMING 5
89#define PRIMARY_USE_PRESENTATION 6
90#define PRIMARY_USE_HEAD_MOUNTED_VR 7
91#define PRIMARY_USE_HEAD_MOUNTED_AR 8
92
93struct displayid_header {
94 u8 rev;
95 u8 bytes;
96 u8 prod_id;
97 u8 ext_count;
98} __packed;
99
100struct displayid_block {
101 u8 tag;
102 u8 rev;
103 u8 num_bytes;
104} __packed;
105
106struct displayid_tiled_block {
107 struct displayid_block base;
108 u8 tile_cap;
109 u8 topo[3];
110 u8 tile_size[4];
111 u8 tile_pixel_bezel[5];
112 u8 topology_id[8];
113} __packed;
114
115struct displayid_detailed_timings_1 {
116 u8 pixel_clock[3];
117 u8 flags;
118 __le16 hactive;
119 __le16 hblank;
120 __le16 hsync;
121 __le16 hsw;
122 __le16 vactive;
123 __le16 vblank;
124 __le16 vsync;
125 __le16 vsw;
126} __packed;
127
128struct displayid_detailed_timing_block {
129 struct displayid_block base;
130 struct displayid_detailed_timings_1 timings[];
131} __packed;
132
133struct displayid_formula_timings_9 {
134 u8 flags;
135 __le16 hactive;
136 __le16 vactive;
137 u8 vrefresh;
138} __packed;
139
140struct displayid_formula_timing_block {
141 struct displayid_block base;
142 struct displayid_formula_timings_9 timings[];
143} __packed;
144
145#define DISPLAYID_VESA_MSO_OVERLAP GENMASK(3, 0)
146#define DISPLAYID_VESA_MSO_MODE GENMASK(6, 5)
147
148struct displayid_vesa_vendor_specific_block {
149 struct displayid_block base;
150 u8 oui[3];
151 u8 data_structure_type;
152 u8 mso;
153} __packed;
154
155/*
156 * DisplayID iteration.
157 *
158 * Do not access directly, this is private.
159 */
160struct displayid_iter {
161 const struct drm_edid *drm_edid;
162
163 const u8 *section;
164 int length;
165 int idx;
166 int ext_index;
167
168 u8 version;
169 u8 primary_use;
170
171 u8 quirks;
172};
173
174void displayid_iter_edid_begin(const struct drm_edid *drm_edid,
175 struct displayid_iter *iter);
176const struct displayid_block *
177__displayid_iter_next(struct displayid_iter *iter);
178#define displayid_iter_for_each(__block, __iter) \
179 while (((__block) = __displayid_iter_next(__iter)))
180void displayid_iter_end(struct displayid_iter *iter);
181
182u8 displayid_version(const struct displayid_iter *iter);
183u8 displayid_primary_use(const struct displayid_iter *iter);
184
185#endif
186

source code of linux/drivers/gpu/drm/drm_displayid_internal.h