drm/displayid: add displayid defines and edid extension (v2)

/*

 * Copyright © 2014 Red Hat Inc.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR

 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

 * OTHER DEALINGS IN THE SOFTWARE.

 */

#ifndef DRM_DISPLAYID_H

#define DRM_DISPLAYID_H

#define DATA_BLOCK_PRODUCT_ID 0x00

#define DATA_BLOCK_DISPLAY_PARAMETERS 0x01

#define DATA_BLOCK_COLOR_CHARACTERISTICS 0x02

#define DATA_BLOCK_TYPE_1_DETAILED_TIMING 0x03

#define DATA_BLOCK_TYPE_2_DETAILED_TIMING 0x04

#define DATA_BLOCK_TYPE_3_SHORT_TIMING 0x05

#define DATA_BLOCK_TYPE_4_DMT_TIMING 0x06

#define DATA_BLOCK_VESA_TIMING 0x07

#define DATA_BLOCK_CEA_TIMING 0x08

#define DATA_BLOCK_VIDEO_TIMING_RANGE 0x09

#define DATA_BLOCK_PRODUCT_SERIAL_NUMBER 0x0a

#define DATA_BLOCK_GP_ASCII_STRING 0x0b

#define DATA_BLOCK_DISPLAY_DEVICE_DATA 0x0c

#define DATA_BLOCK_INTERFACE_POWER_SEQUENCING 0x0d

#define DATA_BLOCK_TRANSFER_CHARACTERISTICS 0x0e

#define DATA_BLOCK_DISPLAY_INTERFACE 0x0f

#define DATA_BLOCK_STEREO_DISPLAY_INTERFACE 0x10

#define DATA_BLOCK_TILED_DISPLAY 0x12

#define DATA_BLOCK_VENDOR_SPECIFIC 0x7f

#define PRODUCT_TYPE_EXTENSION 0

#define PRODUCT_TYPE_TEST 1

#define PRODUCT_TYPE_PANEL 2

#define PRODUCT_TYPE_MONITOR 3

#define PRODUCT_TYPE_TV 4

#define PRODUCT_TYPE_REPEATER 5

#define PRODUCT_TYPE_DIRECT_DRIVE 6

struct displayid_hdr {

	u8 rev;

	u8 bytes;

	u8 prod_id;

	u8 ext_count;

} __packed;

struct displayid_block {

	u8 tag;

	u8 rev;

	u8 num_bytes;

} __packed;

struct displayid_tiled_block {

	struct displayid_block base;

	u8 tile_cap;

	u8 topo[3];

	u8 tile_size[4];

	u8 tile_pixel_bezel[5];

	u8 topology_id[8];

} __packed;

#endif

#define EDID_LENGTH 128

#define DDC_ADDR 0x50

#define DDC_ADDR2 0x52 /* E-DDC 1.2 - where DisplayID can hide */

#define CEA_EXT	    0x02

#define VTB_EXT	    0x10

#define DI_EXT	    0x40

#define LS_EXT	    0x50

#define MI_EXT	    0x60

#define DISPLAYID_EXT 0x70

struct est_timings {

	u8 t1;