kernel/linux.git/drivers/gpu/drm/ttm, branch v6.19.11

drm/ttm/tests: Fix build failure on PREEMPT_RT

2026-04-02T11:25:20+00:00

[ Upstream commit a58d487fb1a52579d3c37544ea371da78ed70c45 ] Fix a compile error in the kunit tests when CONFIG_PREEMPT_RT is enabled, and the normal mutex is converted into a rtmutex. Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202602261547.3bM6yVAS-lkp@intel.com/ Reviewed-by: Jouni Högander Link: https://patch.msgid.link/20260304085616.1216961-1-dev@lankhorst.se Signed-off-by: Maarten Lankhorst Signed-off-by: Sasha Levin

drm/ttm: Fix ttm_pool_beneficial_order() return type

2026-03-19T15:15:20+00:00

commit 6e3f4514e3b432871ac81717d24f56b441857f77 upstream. Fix a nasty copy and paste bug, where the incorrect boolean return type of the ttm_pool_beneficial_order() helper had a consequence of avoiding direct reclaim too eagerly for drivers which use this feature (currently amdgpu). Signed-off-by: Tvrtko Ursulin Fixes: 7e9c548d3709 ("drm/ttm: Allow drivers to specify maximum beneficial TTM pool size") Cc: Christian König Cc: Thadeu Lima de Souza Cascardo Cc: dri-devel@lists.freedesktop.org Cc: # v6.19+ Reviewed-by: Christian König Signed-off-by: Tvrtko Ursulin Link: https://lore.kernel.org/r/20260227124901.3177-1-tvrtko.ursulin@igalia.com Signed-off-by: Greg Kroah-Hartman

Merge tag 'drm-fixes-2025-12-13' of https://gitlab.freedesktop.org/drm/kernel

2025-12-13T05:39:28+00:00

Pull more drm fixes from Dave Airlie: "These are the enqueued fixes that ended up in our fixes branch, nouveau mostly, along with some small fixes in other places. plane: - Handle IS_ERR vs NULL in drm_plane_create_hotspot_properties() ttm: - fix devcoredump for evicted bos panel: - Fix stack usage warning in novatek-nt35560 nouveau: - alloc fwsec sb at boot to avoid s/r problems - fix strcpy usage - fix i2c encoder crash bridge: - Ignore spurious PLL_UNLOCK bit in ti-sn65dsi83 mgag200: - Fix bigendian handling in mgag200 tilcdc: - Fix probe failure in tilcdc" * tag 'drm-fixes-2025-12-13' of https://gitlab.freedesktop.org/drm/kernel: drm/mgag200: Fix big-endian support drm/tilcdc: Fix removal actions in case of failed probe drm/ttm: Avoid NULL pointer deref for evicted BOs drm: nouveau: Replace sprintf() with sysfs_emit() drm/nouveau: fix circular dep oops from vendored i2c encoder drm/nouveau: refactor deprecated strcpy drm/plane: Fix IS_ERR() vs NULL check in drm_plane_create_hotspot_properties() drm/bridge: ti-sn65dsi83: ignore PLL_UNLOCK errors drm/nouveau/gsp: Allocate fwsec-sb at boot drm/panel: novatek-nt35560: avoid on-stack device structure

drm/ttm: Avoid NULL pointer deref for evicted BOs

2025-12-08T20:07:48+00:00

It is possible for a BO to exist that is not currently associated with a resource, e.g. because it has been evicted. When devcoredump tries to read the contents of all BOs for dumping, we need to expect this as well -- in this case, ENODATA is recorded instead of the buffer contents. Fixes: 7d08df5d0bd3 ("drm/ttm: Add ttm_bo_access") Fixes: 09ac4fcb3f25 ("drm/ttm: Implement vm_operations_struct.access v2") Cc: stable Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/6271 Signed-off-by: Simon Richter Reviewed-by: Matthew Brost Reviewed-by: Shuicheng Lin Reviewed-by: Christian König Signed-off-by: Matthew Brost Link: https://patch.msgid.link/20251013161241.709916-1-Simon.Richter@hogyros.de

drm/ttm: rework pipelined eviction fence handling

2025-11-26T12:12:23+00:00

Until now ttm stored a single pipelined eviction fence which means drivers had to use a single entity for these evictions. To lift this requirement, this commit allows up to 8 entities to be used. Ideally a dma_resv object would have been used as a container of the eviction fences, but the locking rules makes it complex. dma_resv all have the same ww_class, which means "Attempting to lock more mutexes after ww_acquire_done." is an error. One alternative considered was to introduced a 2nd ww_class for specific resv to hold a single "transient" lock (= the resv lock would only be held for a short period, without taking any other locks). The other option, is to statically reserve a fence array, and extend the existing code to deal with N fences, instead of 1. The driver is still responsible to reserve the correct number of fence slots. Signed-off-by: Pierre-Eric Pelloux-Prayer Link: https://lore.kernel.org/r/20251121101315.3585-20-pierre-eric.pelloux-prayer@amd.com Reviewed-by: Christian König Signed-off-by: Christian König

drm/ttm: Fix @alloc_flags description

2025-11-06T10:35:47+00:00

Stephen Rothwell reports htmldocs warnings when merging drm-misc tree: Documentation/gpu/drm-mm:40: include/drm/ttm/ttm_device.h:225: ERROR: Unknown target name: "ttm_allocation". [docutils] Documentation/gpu/drm-mm:43: drivers/gpu/drm/ttm/ttm_device.c:202: ERROR: Unknown target name: "ttm_allocation". [docutils] Documentation/gpu/drm-mm:73: include/drm/ttm/ttm_pool.h:68: ERROR: Unknown target name: "ttm_allocation_pool". [docutils] Documentation/gpu/drm-mm:76: drivers/gpu/drm/ttm/ttm_pool.c:1070: ERROR: Unknown target name: "ttm_allocation_pool". [docutils] Fix these by adding missing wildcard on TTM_ALLOCATION_* and TTM_ALLOCATION_POOL_* in @alloc_flags description. Fixes: 0af5b6a8f8dd ("drm/ttm: Replace multiple booleans with flags in pool init") Fixes: 77e19f8d3297 ("drm/ttm: Replace multiple booleans with flags in device init") Fixes: 402b3a865090 ("drm/ttm: Add an allocation flag to propagate -ENOSPC on OOM") Reported-by: Stephen Rothwell Closes: https://lore.kernel.org/linux-next/20251105161838.55b962a3@canb.auug.org.au/ Signed-off-by: Bagas Sanjaya Acked-by: Tvrtko Ursulin Reviewed-by: Christian König Signed-off-by: Tvrtko Ursulin Link: https://lore.kernel.org/r/20251106005217.14026-1-bagasdotme@gmail.com

drm/ttm: Add an allocation flag to propagate -ENOSPC on OOM

2025-10-31T09:27:28+00:00

Some graphics APIs differentiate between out-of-graphics-memory and out-of-host-memory (system memory). Add a device init flag to have -ENOSPC propagated from the resource managers instead of being converted to -ENOMEM, to aid driver stacks in determining what error code to return or whether corrective action can be taken at the driver level. Co-developed-by: Thomas Hellström Cc: Christian König Cc: Matthew Brost Signed-off-by: Tvrtko Ursulin Reviewed-by: Thomas Hellström Reviewed-by: Christian König Signed-off-by: Tvrtko Ursulin Link: https://lore.kernel.org/r/20251020115411.36818-7-tvrtko.ursulin@igalia.com

drm/ttm: Allow drivers to specify maximum beneficial TTM pool size

2025-10-31T09:14:50+00:00

GPUs typically benefit from contiguous memory via reduced TLB pressure and improved caching performance, where the maximum size of contiguous block which adds a performance benefit is related to hardware design. TTM pool allocator by default tries (hard) to allocate up to the system MAX_PAGE_ORDER blocks. This varies by the CPU platform and can also be configured via Kconfig. If that limit was set to be higher than the GPU can make an extra use of, lets allow the individual drivers to let TTM know over which allocation order can the pool allocator afford to make a little bit less effort with. We implement this by disabling direct reclaim for those allocations, which reduces the allocation latency and lowers the demands on the page allocator, in cases where expending this effort is not critical for the GPU in question. Signed-off-by: Tvrtko Ursulin Cc: Christian König Cc: Thadeu Lima de Souza Cascardo Reviewed-by: Christian König Signed-off-by: Tvrtko Ursulin Link: https://lore.kernel.org/r/20251020115411.36818-5-tvrtko.ursulin@igalia.com

drm/ttm: Replace multiple booleans with flags in device init

2025-10-31T09:14:35+00:00

Multiple consecutive boolean function arguments are usually not very readable. Replace the ones in ttm_device_init() with flags with the additional benefit of soon being able to pass in more data with just a one off code base churning cost. Signed-off-by: Tvrtko Ursulin Cc: Alex Deucher Cc: Christian König Cc: Danilo Krummrich Cc: Dave Airlie Cc: Gerd Hoffmann Cc: Joonas Lahtinen Cc: Lucas De Marchi Cc: Lyude Paul Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Rodrigo Vivi Cc: Sui Jingfeng Cc: Thomas Hellström Cc: Thomas Zimmermann Cc: Zack Rusin Acked-by: Christian König Acked-by: Zack Rusin Acked-by: Thomas Hellström # For xe Reviewed-by: Christian König Signed-off-by: Tvrtko Ursulin Link: https://lore.kernel.org/r/20251020115411.36818-4-tvrtko.ursulin@igalia.com [tursulin: fixup checkpatch while applying]

drm/ttm: Replace multiple booleans with flags in pool init

2025-10-31T09:01:08+00:00

Multiple consecutive boolean function arguments are usually not very readable. Replace the ones in ttm_pool_init() with flags with the additional benefit of soon being able to pass in more data with just this one code base churning cost. Signed-off-by: Tvrtko Ursulin Cc: Alex Deucher Cc: Christian König Cc: Thomas Hellström Reviewed-by: Christian König Signed-off-by: Tvrtko Ursulin Link: https://lore.kernel.org/r/20251020115411.36818-3-tvrtko.ursulin@igalia.com