2014-10-19 23:13:19 -07:00
|
|
|
/*
|
|
|
|
* 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.
|
|
|
|
*/
|
2024-04-16 02:19:54 -07:00
|
|
|
|
|
|
|
#ifndef __DRM_DISPLAYID_INTERNAL_H__
|
|
|
|
#define __DRM_DISPLAYID_INTERNAL_H__
|
2014-10-19 23:13:19 -07:00
|
|
|
|
2021-03-29 06:37:16 -07:00
|
|
|
#include <linux/types.h>
|
drm/edid: parse the DisplayID v2.0 VESA vendor block for MSO
The VESA Organization Vendor-Specific Data Block, defined in VESA
DisplayID Standard v2.0, specifies the eDP Multi-SST Operation (MSO)
stream count and segment pixel overlap.
DisplayID v1.3 has Appendix B: DisplayID as an EDID Extension,
describing how DisplayID sections may be embedded in EDID extension
blocks. DisplayID v2.0 does not have such a section, perhaps implying
that DisplayID v2.0 data should not be included in EDID extensions, but
rather in a "pure" DisplayID structure at its own DDC address pair
A4h/A5h, as described in VESA E-DDC Standard v1.3 chapter 3.
However, in practice, displays out in the field have embedded DisplayID
v2.0 data blocks in EDID extensions, including, in particular, some eDP
MSO displays, where a pure DisplayID structure is not available at all.
Parse the MSO data from the DisplayID data block. Do it as part of
drm_add_display_info(), extending it to parse also DisplayID data to
avoid requiring extra calls to update the information.
v2: Check for VESA OUI (Ville)
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Acked-by: Maxime Ripard <maxime@cerno.tech>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/73ca2887e7b37880690f5c9ba4594c9cd1170669.1630419362.git.jani.nikula@intel.com
2021-08-31 07:17:33 -07:00
|
|
|
#include <linux/bits.h>
|
2021-03-29 06:37:16 -07:00
|
|
|
|
2022-05-09 05:03:23 -07:00
|
|
|
struct drm_edid;
|
2021-03-29 06:37:16 -07:00
|
|
|
|
drm/edid: parse the DisplayID v2.0 VESA vendor block for MSO
The VESA Organization Vendor-Specific Data Block, defined in VESA
DisplayID Standard v2.0, specifies the eDP Multi-SST Operation (MSO)
stream count and segment pixel overlap.
DisplayID v1.3 has Appendix B: DisplayID as an EDID Extension,
describing how DisplayID sections may be embedded in EDID extension
blocks. DisplayID v2.0 does not have such a section, perhaps implying
that DisplayID v2.0 data should not be included in EDID extensions, but
rather in a "pure" DisplayID structure at its own DDC address pair
A4h/A5h, as described in VESA E-DDC Standard v1.3 chapter 3.
However, in practice, displays out in the field have embedded DisplayID
v2.0 data blocks in EDID extensions, including, in particular, some eDP
MSO displays, where a pure DisplayID structure is not available at all.
Parse the MSO data from the DisplayID data block. Do it as part of
drm_add_display_info(), extending it to parse also DisplayID data to
avoid requiring extra calls to update the information.
v2: Check for VESA OUI (Ville)
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Acked-by: Maxime Ripard <maxime@cerno.tech>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/73ca2887e7b37880690f5c9ba4594c9cd1170669.1630419362.git.jani.nikula@intel.com
2021-08-31 07:17:33 -07:00
|
|
|
#define VESA_IEEE_OUI 0x3a0292
|
|
|
|
|
2021-08-31 07:17:31 -07:00
|
|
|
/* DisplayID Structure versions */
|
|
|
|
#define DISPLAY_ID_STRUCTURE_VER_20 0x20
|
|
|
|
|
2021-08-31 07:17:30 -07:00
|
|
|
/* 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
|
2014-10-19 23:13:19 -07:00
|
|
|
|
2021-08-31 07:17:31 -07:00
|
|
|
/* 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
|
|
|
|
|
2021-08-31 07:17:30 -07:00
|
|
|
/* 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
|
2014-10-19 23:13:19 -07:00
|
|
|
|
2021-08-31 07:17:31 -07:00
|
|
|
/* 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
|
|
|
|
|
2021-03-29 06:37:22 -07:00
|
|
|
struct displayid_header {
|
2014-10-19 23:13:19 -07:00
|
|
|
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;
|
|
|
|
|
2016-05-01 15:35:05 -07:00
|
|
|
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;
|
2020-05-28 07:35:11 -07:00
|
|
|
struct displayid_detailed_timings_1 timings[];
|
2016-05-01 15:35:05 -07:00
|
|
|
};
|
2019-06-19 11:09:01 -07:00
|
|
|
|
drm/edid: parse the DisplayID v2.0 VESA vendor block for MSO
The VESA Organization Vendor-Specific Data Block, defined in VESA
DisplayID Standard v2.0, specifies the eDP Multi-SST Operation (MSO)
stream count and segment pixel overlap.
DisplayID v1.3 has Appendix B: DisplayID as an EDID Extension,
describing how DisplayID sections may be embedded in EDID extension
blocks. DisplayID v2.0 does not have such a section, perhaps implying
that DisplayID v2.0 data should not be included in EDID extensions, but
rather in a "pure" DisplayID structure at its own DDC address pair
A4h/A5h, as described in VESA E-DDC Standard v1.3 chapter 3.
However, in practice, displays out in the field have embedded DisplayID
v2.0 data blocks in EDID extensions, including, in particular, some eDP
MSO displays, where a pure DisplayID structure is not available at all.
Parse the MSO data from the DisplayID data block. Do it as part of
drm_add_display_info(), extending it to parse also DisplayID data to
avoid requiring extra calls to update the information.
v2: Check for VESA OUI (Ville)
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Acked-by: Maxime Ripard <maxime@cerno.tech>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/73ca2887e7b37880690f5c9ba4594c9cd1170669.1630419362.git.jani.nikula@intel.com
2021-08-31 07:17:33 -07:00
|
|
|
#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;
|
|
|
|
|
2023-02-16 13:45:00 -07:00
|
|
|
/*
|
|
|
|
* DisplayID iteration.
|
|
|
|
*
|
|
|
|
* Do not access directly, this is private.
|
|
|
|
*/
|
drm/displayid: add new displayid section/block iterators
Iterating DisplayID blocks across sections (in EDID extensions) is
unnecessarily complicated for the caller. Implement DisplayID iterators
to go through all blocks in all sections.
Usage example:
const struct displayid_block *block;
struct displayid_iter iter;
displayid_iter_edid_begin(edid, &iter);
displayid_iter_for_each(block, &iter) {
/* operate on block */
}
displayid_iter_end(&iter);
When DisplayID is stored in EDID extensions, the DisplayID sections map
to extensions as described in VESA DisplayID v1.3 Appendix B: DisplayID
as an EDID Extension. This is implemented here.
When DisplayID is stored in its dedicated DDC device 0xA4, according to
VESA E-DDC v1.3, different rules apply for the structure. This is not
implemented here, as we don't currently use it, but the idea is you'd
have a different call for beginning the iteration, for example simply:
displayid_iter_begin(displayid, &iter);
instead of displayid_iter_edid_begin(), and everything else would be
hidden away in the iterator functions.
v2:
- sizeof(struct displayid_block) -> sizeof(*block) (Ville)
- remove __ prefix from displayid_iter_block
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/da3dead1752ab16c061f7bd248ac1a4268f7fefb.1617024940.git.jani.nikula@intel.com
2021-03-29 06:37:17 -07:00
|
|
|
struct displayid_iter {
|
2022-05-09 05:03:23 -07:00
|
|
|
const struct drm_edid *drm_edid;
|
drm/displayid: add new displayid section/block iterators
Iterating DisplayID blocks across sections (in EDID extensions) is
unnecessarily complicated for the caller. Implement DisplayID iterators
to go through all blocks in all sections.
Usage example:
const struct displayid_block *block;
struct displayid_iter iter;
displayid_iter_edid_begin(edid, &iter);
displayid_iter_for_each(block, &iter) {
/* operate on block */
}
displayid_iter_end(&iter);
When DisplayID is stored in EDID extensions, the DisplayID sections map
to extensions as described in VESA DisplayID v1.3 Appendix B: DisplayID
as an EDID Extension. This is implemented here.
When DisplayID is stored in its dedicated DDC device 0xA4, according to
VESA E-DDC v1.3, different rules apply for the structure. This is not
implemented here, as we don't currently use it, but the idea is you'd
have a different call for beginning the iteration, for example simply:
displayid_iter_begin(displayid, &iter);
instead of displayid_iter_edid_begin(), and everything else would be
hidden away in the iterator functions.
v2:
- sizeof(struct displayid_block) -> sizeof(*block) (Ville)
- remove __ prefix from displayid_iter_block
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/da3dead1752ab16c061f7bd248ac1a4268f7fefb.1617024940.git.jani.nikula@intel.com
2021-03-29 06:37:17 -07:00
|
|
|
|
|
|
|
const u8 *section;
|
|
|
|
int length;
|
|
|
|
int idx;
|
|
|
|
int ext_index;
|
2023-02-16 13:45:00 -07:00
|
|
|
|
|
|
|
u8 version;
|
|
|
|
u8 primary_use;
|
drm/displayid: add new displayid section/block iterators
Iterating DisplayID blocks across sections (in EDID extensions) is
unnecessarily complicated for the caller. Implement DisplayID iterators
to go through all blocks in all sections.
Usage example:
const struct displayid_block *block;
struct displayid_iter iter;
displayid_iter_edid_begin(edid, &iter);
displayid_iter_for_each(block, &iter) {
/* operate on block */
}
displayid_iter_end(&iter);
When DisplayID is stored in EDID extensions, the DisplayID sections map
to extensions as described in VESA DisplayID v1.3 Appendix B: DisplayID
as an EDID Extension. This is implemented here.
When DisplayID is stored in its dedicated DDC device 0xA4, according to
VESA E-DDC v1.3, different rules apply for the structure. This is not
implemented here, as we don't currently use it, but the idea is you'd
have a different call for beginning the iteration, for example simply:
displayid_iter_begin(displayid, &iter);
instead of displayid_iter_edid_begin(), and everything else would be
hidden away in the iterator functions.
v2:
- sizeof(struct displayid_block) -> sizeof(*block) (Ville)
- remove __ prefix from displayid_iter_block
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/da3dead1752ab16c061f7bd248ac1a4268f7fefb.1617024940.git.jani.nikula@intel.com
2021-03-29 06:37:17 -07:00
|
|
|
};
|
|
|
|
|
2022-05-09 05:03:23 -07:00
|
|
|
void displayid_iter_edid_begin(const struct drm_edid *drm_edid,
|
drm/displayid: add new displayid section/block iterators
Iterating DisplayID blocks across sections (in EDID extensions) is
unnecessarily complicated for the caller. Implement DisplayID iterators
to go through all blocks in all sections.
Usage example:
const struct displayid_block *block;
struct displayid_iter iter;
displayid_iter_edid_begin(edid, &iter);
displayid_iter_for_each(block, &iter) {
/* operate on block */
}
displayid_iter_end(&iter);
When DisplayID is stored in EDID extensions, the DisplayID sections map
to extensions as described in VESA DisplayID v1.3 Appendix B: DisplayID
as an EDID Extension. This is implemented here.
When DisplayID is stored in its dedicated DDC device 0xA4, according to
VESA E-DDC v1.3, different rules apply for the structure. This is not
implemented here, as we don't currently use it, but the idea is you'd
have a different call for beginning the iteration, for example simply:
displayid_iter_begin(displayid, &iter);
instead of displayid_iter_edid_begin(), and everything else would be
hidden away in the iterator functions.
v2:
- sizeof(struct displayid_block) -> sizeof(*block) (Ville)
- remove __ prefix from displayid_iter_block
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/da3dead1752ab16c061f7bd248ac1a4268f7fefb.1617024940.git.jani.nikula@intel.com
2021-03-29 06:37:17 -07:00
|
|
|
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);
|
|
|
|
|
2023-02-16 13:45:00 -07:00
|
|
|
u8 displayid_version(const struct displayid_iter *iter);
|
|
|
|
u8 displayid_primary_use(const struct displayid_iter *iter);
|
|
|
|
|
2014-10-19 23:13:19 -07:00
|
|
|
#endif
|