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 #define DATA_BLOCK_PRODUCT_ID 0x00
26 #define DATA_BLOCK_DISPLAY_PARAMETERS 0x01
27 #define DATA_BLOCK_COLOR_CHARACTERISTICS 0x02
28 #define DATA_BLOCK_TYPE_1_DETAILED_TIMING 0x03
29 #define DATA_BLOCK_TYPE_2_DETAILED_TIMING 0x04
30 #define DATA_BLOCK_TYPE_3_SHORT_TIMING 0x05
31 #define DATA_BLOCK_TYPE_4_DMT_TIMING 0x06
32 #define DATA_BLOCK_VESA_TIMING 0x07
33 #define DATA_BLOCK_CEA_TIMING 0x08
34 #define DATA_BLOCK_VIDEO_TIMING_RANGE 0x09
35 #define DATA_BLOCK_PRODUCT_SERIAL_NUMBER 0x0a
36 #define DATA_BLOCK_GP_ASCII_STRING 0x0b
37 #define DATA_BLOCK_DISPLAY_DEVICE_DATA 0x0c
38 #define DATA_BLOCK_INTERFACE_POWER_SEQUENCING 0x0d
39 #define DATA_BLOCK_TRANSFER_CHARACTERISTICS 0x0e
40 #define DATA_BLOCK_DISPLAY_INTERFACE 0x0f
41 #define DATA_BLOCK_STEREO_DISPLAY_INTERFACE 0x10
42 #define DATA_BLOCK_TILED_DISPLAY 0x12
43 #define DATA_BLOCK_CTA 0x81
44 
45 #define DATA_BLOCK_VENDOR_SPECIFIC 0x7f
46 
47 #define PRODUCT_TYPE_EXTENSION 0
48 #define PRODUCT_TYPE_TEST 1
49 #define PRODUCT_TYPE_PANEL 2
50 #define PRODUCT_TYPE_MONITOR 3
51 #define PRODUCT_TYPE_TV 4
52 #define PRODUCT_TYPE_REPEATER 5
53 #define PRODUCT_TYPE_DIRECT_DRIVE 6
54 
55 struct displayid_hdr {
56 	u8 rev;
57 	u8 bytes;
58 	u8 prod_id;
59 	u8 ext_count;
60 } __packed;
61 
62 struct displayid_block {
63 	u8 tag;
64 	u8 rev;
65 	u8 num_bytes;
66 } __packed;
67 
68 struct displayid_tiled_block {
69 	struct displayid_block base;
70 	u8 tile_cap;
71 	u8 topo[3];
72 	u8 tile_size[4];
73 	u8 tile_pixel_bezel[5];
74 	u8 topology_id[8];
75 } __packed;
76 
77 struct displayid_detailed_timings_1 {
78 	u8 pixel_clock[3];
79 	u8 flags;
80 	u8 hactive[2];
81 	u8 hblank[2];
82 	u8 hsync[2];
83 	u8 hsw[2];
84 	u8 vactive[2];
85 	u8 vblank[2];
86 	u8 vsync[2];
87 	u8 vsw[2];
88 } __packed;
89 
90 struct displayid_detailed_timing_block {
91 	struct displayid_block base;
92 	struct displayid_detailed_timings_1 timings[0];
93 };
94 
95 #define for_each_displayid_db(displayid, block, idx, length) \
96 	for ((block) = (struct displayid_block *)&(displayid)[idx]; \
97 	     (idx) + sizeof(struct displayid_block) <= (length) && \
98 	     (idx) + sizeof(struct displayid_block) + (block)->num_bytes <= (length) && \
99 	     (block)->num_bytes > 0; \
100 	     (idx) += (block)->num_bytes + sizeof(struct displayid_block), \
101 	     (block) = (struct displayid_block *)&(displayid)[idx])
102 
103 #endif
104