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/*
* 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
#include <linux/types.h>
#include <linux/bits.h>
struct drm_edid;
#define VESA_IEEE_OUI 0x3a0292
/* DisplayID Structure versions */
#define DISPLAY_ID_STRUCTURE_VER_20 0x20
/* DisplayID Structure v1r2 Data Blocks */
#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 DATA_BLOCK_CTA 0x81
/* DisplayID Structure v2r0 Data Blocks */
#define DATA_BLOCK_2_PRODUCT_ID 0x20
#define DATA_BLOCK_2_DISPLAY_PARAMETERS 0x21
#define DATA_BLOCK_2_TYPE_7_DETAILED_TIMING 0x22
#define DATA_BLOCK_2_TYPE_8_ENUMERATED_TIMING 0x23
#define DATA_BLOCK_2_TYPE_9_FORMULA_TIMING 0x24
#define DATA_BLOCK_2_DYNAMIC_VIDEO_TIMING 0x25
#define DATA_BLOCK_2_DISPLAY_INTERFACE_FEATURES 0x26
#define DATA_BLOCK_2_STEREO_DISPLAY_INTERFACE 0x27
#define DATA_BLOCK_2_TILED_DISPLAY_TOPOLOGY 0x28
#define DATA_BLOCK_2_CONTAINER_ID 0x29
#define DATA_BLOCK_2_VENDOR_SPECIFIC 0x7e
#define DATA_BLOCK_2_CTA_DISPLAY_ID 0x81
/* DisplayID Structure v1r2 Product Type */
#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
/* DisplayID Structure v2r0 Display Product Primary Use Case (~Product Type) */
#define PRIMARY_USE_EXTENSION 0
#define PRIMARY_USE_TEST 1
#define PRIMARY_USE_GENERIC 2
#define PRIMARY_USE_TV 3
#define PRIMARY_USE_DESKTOP_PRODUCTIVITY 4
#define PRIMARY_USE_DESKTOP_GAMING 5
#define PRIMARY_USE_PRESENTATION 6
#define PRIMARY_USE_HEAD_MOUNTED_VR 7
#define PRIMARY_USE_HEAD_MOUNTED_AR 8
struct displayid_header {
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;
struct displayid_detailed_timings_1 {
u8 pixel_clock[3];
u8 flags;
u8 hactive[2];
u8 hblank[2];
u8 hsync[2];
u8 hsw[2];
u8 vactive[2];
u8 vblank[2];
u8 vsync[2];
u8 vsw[2];
} __packed;
struct displayid_detailed_timing_block {
struct displayid_block base;
struct displayid_detailed_timings_1 timings[];
};
#define DISPLAYID_VESA_MSO_OVERLAP GENMASK(3, 0)
#define DISPLAYID_VESA_MSO_MODE GENMASK(6, 5)
struct displayid_vesa_vendor_specific_block {
struct displayid_block base;
u8 oui[3];
u8 data_structure_type;
u8 mso;
} __packed;
/*
* DisplayID iteration.
*
* Do not access directly, this is private.
*/
struct displayid_iter {
const struct drm_edid *drm_edid;
const u8 *section;
int length;
int idx;
int ext_index;
u8 version;
u8 primary_use;
};
void displayid_iter_edid_begin(const struct drm_edid *drm_edid,
struct displayid_iter *iter);
const struct displayid_block *
__displayid_iter_next(struct displayid_iter *iter);
#define displayid_iter_for_each(__block, __iter) \
while (((__block) = __displayid_iter_next(__iter)))
void displayid_iter_end(struct displayid_iter *iter);
u8 displayid_version(const struct displayid_iter *iter);
u8 displayid_primary_use(const struct displayid_iter *iter);
#endif
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