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