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linux/include/drm
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Jani Nikula 96b7b80fde drm/displayid: fix Tiled Display Topology ID size 
[ Upstream commit 90c0486a82 ]

The Tiled Display Topology ID of a DisplayID Tiled Display Topology Data
Block consists of three fields:

- Tiled Display Manufacturer/Vendor ID Field (3 bytes)
- Tiled Display Product ID Code Field (2 bytes)
- Tiled Display Serial Number Field (4 bytes)

i.e. a total of 9 bytes, not 8.

The DisplayID Tiled Display Topology ID is used as the tile group
identifier.

Update both struct displayid_tiled_block topology_id member and struct
drm_tile_group group_data member to full 9 bytes.

The group data was missing the last byte of the serial number. I don't
know whether there are known bug reports that might be linked to this,
but it's plausible the last byte could be the differentiating part for
the tile groups, and fewer tile groups might have been created than
intended.

Fixes: b49b55bd4f ("drm/displayid: add displayid defines and edid extension (v2)")
Fixes: 138f9ebb97 ("drm: add tile_group support. (v3)")
Cc: Dave Airlie <airlied@redhat.com>
Cc: stable@vger.kernel.org # v3.19+
Reviewed-by: Dave Airlie <airlied@redhat.com>
Link: https://patch.msgid.link/20260610141549.555605-1-jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2026-08-23 14:17:25 +02:00
..
bridge drm: bridge: dw-hdmi: Attach to next bridge if available 2021-07-28 16:33:13 +03:00
i2c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ttm drm/ttm: fix undefined behavior in bit shift for TTM_TT_FLAG_PRIV_POPULATED 2026-02-06 16:42:03 +01:00
amd_asic_type.h drm/amdgpu: add cyan_skillfish asic type 2021-07-23 10:08:00 -04:00
drm_aperture.h drm/aperture: Pass DRM driver structure instead of driver name 2021-07-01 11:11:55 +02:00
drm_atomic.h drm/atomic: clarify the rules around drm_atomic_state->allow_modeset 2025-06-04 14:38:04 +02:00
drm_atomic_helper.h drm: automatic legacy gamma support 2020-12-15 15:46:03 +02:00
drm_atomic_state_helper.h drm/bridge: Add a drm_bridge_state object 2020-01-31 16:00:21 +01:00
drm_atomic_uapi.h drm: extract drm_atomic_uapi.c 2018-09-09 14:19:18 +02:00
drm_audio_component.h ALSA: hda/i915 - fix list corruption with concurrent probes 2020-10-09 16:46:04 +02:00
drm_auth.h drm: clarify usage of drm leases 2021-07-29 09:12:01 +02:00
drm_blend.h drm: Add per-plane pixel blend mode property 2018-08-24 17:31:37 +01:00
drm_bridge.h drm/bridge: Fix typo in post_disable() description 2024-01-25 14:52:41 -08:00
drm_bridge_connector.h drm: Add helper to create a connector for a chain of bridges 2020-02-26 13:31:41 +02:00
drm_cache.h drm: Add a prefetching memcpy_from_wc 2021-06-07 16:07:08 +02:00
drm_client.h drm/gem: Store client buffer mappings as struct dma_buf_map 2020-11-09 09:19:45 +01:00
drm_color_mgmt.h drm: using mul_u32_u32() requires linux/math64.h 2024-02-23 08:54:52 +01:00
drm_connector.h drm/displayid: fix Tiled Display Topology ID size 2026-08-23 14:17:25 +02:00
drm_crtc.h drm: drm_crc: fix a kernel-doc markup 2021-01-14 15:11:46 +01:00
drm_crtc_helper.h drm: Split out drm_probe_helper.h 2019-01-24 13:20:42 +01:00
drm_damage_helper.h drm/plane: Move drm_plane_enable_fb_damage_clips into core 2021-07-27 12:21:22 +02:00
drm_debugfs.h drm/debugfs: remove checks for return value of drm_debugfs functions. 2020-03-18 17:32:20 +01:00
drm_debugfs_crc.h drm/crc: Only report a single overflow when a CRC fd is opened 2018-07-06 14:57:03 +02:00
drm_device.h drm: IRQ midlayer is now legacy 2021-08-10 20:14:01 +02:00
drm_displayid.h drm/displayid: fix Tiled Display Topology ID size 2026-08-23 14:17:25 +02:00
drm_dp_aux_bus.h drm: Introduce the DP AUX bus 2021-06-11 12:30:39 -07:00
drm_dp_dual_mode_helper.h drm/dp_dual_mode: Pass drm_device to drm_lspcon_(get|set)_mode() 2021-04-27 18:43:44 -04:00
drm_dp_helper.h drm/dp: Add eDP 1.5 bit definition 2026-06-19 13:33:25 +02:00
drm_dp_mst_helper.h drm/dp_mst: Fix drm RAD print 2025-04-10 14:31:58 +02:00
drm_drv.h drm: IRQ midlayer is now legacy 2021-08-10 20:14:01 +02:00
drm_dsc.h - Display hotplug fix for gen2/gen3 (Chris) 2021-01-07 12:20:29 +01:00
drm_edid.h drm: fix EDID struct for old ARM OABI format 2022-06-09 10:22:44 +02:00
drm_encoder.h drm/encoder: Add macro drmm_plain_encoder_alloc() 2021-03-29 16:46:43 +01:00
drm_encoder_slave.h drm: remove include of drmP.h from drm_encoder_slave.h 2019-01-09 22:35:35 +01:00
drm_fb_cma_helper.h drm: Add and export function drm_fb_cma_sync_non_coherent 2021-05-25 11:42:09 +01:00
drm_fb_helper.h fbdev: Rename pagelist to pagereflist for deferred I/O 2024-02-23 08:55:13 +01:00
drm_file.h drm/gem: Fix race in drm_gem_handle_create_tail() 2025-07-17 18:30:49 +02:00
drm_fixed.h drm: Don't treat 0 as -1 in drm_fixp2int_ceil 2024-03-26 18:21:25 -04:00
drm_flip_work.h drm/kms-helpers: Use recommened kerneldoc for struct member refs 2017-01-25 16:18:57 +01:00
drm_format_helper.h drm/format-helper: Add blitter functions 2021-05-01 12:45:03 +02:00
drm_fourcc.h drm: Remove plane hsub/vsub alignment requirement for core helpers 2026-06-19 13:33:22 +02:00
drm_framebuffer.h drm: Define DRM_FORMAT_MAX_PLANES 2021-08-02 16:41:20 +02:00
drm_gem.h drm: Drop drm_gem_object_put_locked() 2021-07-27 18:09:18 -07:00
drm_gem_atomic_helper.h drm/gem: Provide offset-adjusted framebuffer BO mappings 2021-08-08 20:26:16 +02:00
drm_gem_cma_helper.h drm: Add support for GEM buffers backed by non-coherent memory 2021-05-25 11:41:07 +01:00
drm_gem_framebuffer_helper.h drm/gem: Provide offset-adjusted framebuffer BO mappings 2021-08-08 20:26:16 +02:00
drm_gem_shmem_helper.h drm/shmem-helper: Pass GEM shmem object in public interfaces 2022-08-17 14:23:19 +02:00
drm_gem_ttm_helper.h drm/gem-ttm-helper: Provide helper for struct drm_driver.dumb_map_offset 2021-04-11 20:14:45 +02:00
drm_gem_vram_helper.h drm/vram-helper: Unexport drm_vram_helper_{alloc,release}_mm() 2021-07-05 08:55:11 +02:00
drm_hashtab.h drm: drop extern from function decls 2017-03-24 09:36:06 +01:00
drm_hdcp.h drm/hdcp: DP HDCP2.2 errata LC_Send_L_Prime=16 2021-03-31 14:27:43 +03:00
drm_ioctl.h drm: Return -ENOTTY for non-drm ioctls 2021-07-20 15:57:43 +02:00
drm_lease.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 2019-05-30 11:26:37 -07:00
drm_legacy.h drm: IRQ midlayer is now legacy 2021-08-10 20:14:01 +02:00
drm_managed.h drm: Remove drmm_add_final_kfree() declaration from public headers 2020-12-05 20:01:12 +01:00
drm_mipi_dbi.h drm/dbi: Print errors for mipi_dbi_command() 2021-07-05 00:22:51 +02:00
drm_mipi_dsi.h drm/mipi-dsi: use correct return type for the DSC functions 2024-06-16 13:39:30 +02:00
drm_mm.h drm: fix spelling error in comments 2020-09-17 13:39:44 +02:00
drm_mode_config.h drm/modifiers: Enforce consistency between the cap an IN_FORMATS 2021-05-12 11:31:29 +02:00
drm_mode_object.h drm: remove drm_mode_object_{un/reference} aliases 2018-03-19 09:09:46 -04:00
drm_modes.h drm/modes: add non-OF stub for of_get_drm_display_mode 2021-01-08 19:42:14 +01:00
drm_modeset_helper.h drm: remove drmP.h from drm_modeset_helper.h 2019-02-07 21:48:34 +01:00
drm_modeset_helper_vtables.h drm/atomic-helper: make drm_gem_plane_helper_prepare_fb the default 2021-06-24 15:35:13 +02:00
drm_modeset_lock.h drm/modeset-lock: Take the modeset BKL for legacy drivers 2020-08-17 13:41:50 -04:00
drm_of.h drm: of: drm_of_panel_bridge_remove(): fix device_node leak 2026-03-04 07:20:30 -05:00
drm_panel.h drm/dp: Move panel DP AUX backlight support to drm_dp_helper 2021-07-13 06:38:37 -07:00
drm_pciids.h drm/radeon: change SPDX identifier to MIT 2018-10-15 16:16:12 -05:00
drm_plane.h drm/plane: Move drm_plane_enable_fb_damage_clips into core 2021-07-27 12:21:22 +02:00
drm_plane_helper.h drm: Unexport drm_plane_helper_check_update 2018-10-05 22:45:19 +02:00
drm_prime.h drm/prime: split array import functions v4 2020-11-30 15:00:45 +01:00
drm_print.h drm/printer: Allow NULL data in devcoredump printer 2024-10-17 15:11:32 +02:00
drm_probe_helper.h drm/probe-helper: Create a HPD IRQ event helper for a single connector 2025-03-13 12:50:48 +01:00
drm_property.h drm: document drm_property_enum.value for bitfields 2021-07-26 10:08:22 +02:00
drm_rect.h drm/plane: remove drm_helper_get_plane_damage_clips 2021-07-27 12:21:22 +02:00
drm_scdc_helper.h drm/scdc: Fix typo in bit definition of SCDC_STATUS_FLAGS 2019-11-04 17:58:46 +01:00
drm_self_refresh_helper.h drm/atomic: fix self-refresh helpers crtc state dereference 2019-11-06 13:00:21 -05:00
drm_simple_kms_helper.h drm/simple-kms: Support custom CRTC state 2021-08-08 20:14:08 +02:00
drm_syncobj.h drm/syncobj: add new drm_syncobj_add_point interface v4 2019-04-01 12:05:53 +02:00
drm_sysfs.h drm: uevent for connector status change 2019-08-06 13:16:54 +05:30
drm_util.h drm: Move EXPORT_SYMBOL_FOR_TESTS_ONLY under a separate Kconfig 2019-11-07 21:22:15 +00:00
drm_utils.h drm: export drm_timeout_abs_to_jiffies 2019-03-07 12:00:30 -06:00
drm_vblank.h drm/vblank: Document drm_crtc_vblank_restore constraints 2021-02-10 12:38:55 +01:00
drm_vblank_work.h drm/vblank: Add vblank works 2020-07-16 18:16:31 -04:00
drm_vma_manager.h drm/vma: Add a driver_private member to vma_node. 2021-06-11 10:53:18 +02:00
drm_writeback.h drm/writeback: wire drm_writeback.h to kernel-doc 2020-04-07 17:39:46 +02:00
gma_drm.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 335 2019-06-05 17:37:06 +02:00
gpu_scheduler.h drm/sched: Allow using a dedicated workqueue for the timeout/fault tdr 2021-07-01 08:53:25 +02:00
gud.h drm: Add GUD USB Display driver 2021-03-16 13:12:46 +01:00
i915_component.h drm/i915/tgl: Add additional ports for Tiger Lake 2019-07-11 16:31:14 -07:00
i915_drm.h drm: Move port definition back to i915 header 2019-08-30 14:08:26 +05:30
i915_mei_hdcp_interface.h drm/i915: significantly reduce the use of <drm/i915_drm.h> 2020-02-27 08:35:09 +02:00
i915_pciids.h drm/i915/adl_p: Add PCI Devices IDs 2021-05-07 10:51:38 +03:00
intel-gtt.h iommu/vt-d: Move intel_iommu_gfx_mapped to Intel IOMMU header 2020-09-04 12:12:45 +02:00
intel_lpe_audio.h ALSA: x86: Register multiple PCM devices for the LPE audio card 2017-05-03 16:24:00 +03:00
spsc_queue.h drm/sched: Increment job count before swapping tail spsc queue 2025-07-17 18:30:49 +02:00
task_barrier.h drm: Add Reusable task barrier. 2019-12-18 16:09:12 -05:00