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 #include <linux/bits.h> 27 28 struct drm_edid; 29 30 #define VESA_IEEE_OUI 0x3a0292 31 32 /* DisplayID Structure versions */ 33 #define DISPLAY_ID_STRUCTURE_VER_12 0x12 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_VENDOR_SPECIFIC 0x7e 70 #define DATA_BLOCK_2_CTA_DISPLAY_ID 0x81 71 72 /* DisplayID Structure v1r2 Product Type */ 73 #define PRODUCT_TYPE_EXTENSION 0 74 #define PRODUCT_TYPE_TEST 1 75 #define PRODUCT_TYPE_PANEL 2 76 #define PRODUCT_TYPE_MONITOR 3 77 #define PRODUCT_TYPE_TV 4 78 #define PRODUCT_TYPE_REPEATER 5 79 #define PRODUCT_TYPE_DIRECT_DRIVE 6 80 81 /* DisplayID Structure v2r0 Display Product Primary Use Case (~Product Type) */ 82 #define PRIMARY_USE_EXTENSION 0 83 #define PRIMARY_USE_TEST 1 84 #define PRIMARY_USE_GENERIC 2 85 #define PRIMARY_USE_TV 3 86 #define PRIMARY_USE_DESKTOP_PRODUCTIVITY 4 87 #define PRIMARY_USE_DESKTOP_GAMING 5 88 #define PRIMARY_USE_PRESENTATION 6 89 #define PRIMARY_USE_HEAD_MOUNTED_VR 7 90 #define PRIMARY_USE_HEAD_MOUNTED_AR 8 91 92 struct displayid_header { 93 u8 rev; 94 u8 bytes; 95 u8 prod_id; 96 u8 ext_count; 97 } __packed; 98 99 struct displayid_block { 100 u8 tag; 101 u8 rev; 102 u8 num_bytes; 103 } __packed; 104 105 struct displayid_tiled_block { 106 struct displayid_block base; 107 u8 tile_cap; 108 u8 topo[3]; 109 u8 tile_size[4]; 110 u8 tile_pixel_bezel[5]; 111 u8 topology_id[8]; 112 } __packed; 113 114 struct displayid_detailed_timings_1 { 115 u8 pixel_clock[3]; 116 u8 flags; 117 u8 hactive[2]; 118 u8 hblank[2]; 119 u8 hsync[2]; 120 u8 hsw[2]; 121 u8 vactive[2]; 122 u8 vblank[2]; 123 u8 vsync[2]; 124 u8 vsw[2]; 125 } __packed; 126 127 struct displayid_detailed_timing_block { 128 struct displayid_block base; 129 struct displayid_detailed_timings_1 timings[]; 130 }; 131 132 #define DISPLAYID_VESA_MSO_OVERLAP GENMASK(3, 0) 133 #define DISPLAYID_VESA_MSO_MODE GENMASK(6, 5) 134 135 struct displayid_vesa_vendor_specific_block { 136 struct displayid_block base; 137 u8 oui[3]; 138 u8 data_structure_type; 139 u8 mso; 140 } __packed; 141 142 /* 143 * DisplayID iteration. 144 * 145 * Do not access directly, this is private. 146 */ 147 struct displayid_iter { 148 const struct drm_edid *drm_edid; 149 150 const u8 *section; 151 int length; 152 int idx; 153 int ext_index; 154 155 u8 version; 156 u8 primary_use; 157 }; 158 159 void displayid_iter_edid_begin(const struct drm_edid *drm_edid, 160 struct displayid_iter *iter); 161 const struct displayid_block * 162 __displayid_iter_next(struct displayid_iter *iter); 163 #define displayid_iter_for_each(__block, __iter) \ 164 while (((__block) = __displayid_iter_next(__iter))) 165 void displayid_iter_end(struct displayid_iter *iter); 166 167 u8 displayid_version(const struct displayid_iter *iter); 168 u8 displayid_primary_use(const struct displayid_iter *iter); 169 170 #endif 171