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
 55struct displayid_hdr {
 56	u8 rev;
 57	u8 bytes;
 58	u8 prod_id;
 59	u8 ext_count;
 60} __packed;
 61
 62struct displayid_block {
 63	u8 tag;
 64	u8 rev;
 65	u8 num_bytes;
 66} __packed;
 67
 68struct 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
 77struct 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
 90struct 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