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2021-06-07drm/ttm: fix warning after moving resource to ghost objChristian König1-0/+1
After we moved the resource to the ghost the bo->resource pointer needs to be reset since the owner of the resource is now the ghost. Signed-off-by: Christian König <[email protected]> Reviewed-by: Thomas Hellström <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-06-07drm/ttm: fix access to uninitialized variable.Christian König1-1/+1
The resource is not allocated yet, so no chance that this will work. Use the placement instead. Signed-off-by: Christian König <[email protected]> Reviewed-by: Thomas Hellström <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-06-07drm/ttm, drm/amdgpu: Allow the driver some control over swappingThomas Hellström1-16/+30
We are calling the eviction_valuable driver callback at eviction time to determine whether we actually can evict a buffer object. The upcoming i915 TTM backend needs the same functionality for swapout, and that might actually be beneficial to other drivers as well. Add an eviction_valuable call also in the swapout path. Try to keep the current behaviour for all drivers by returning true if the buffer object is already in the TTM_PL_SYSTEM placement. We change behaviour for the case where a buffer object is in a TT backed placement when swapped out, in which case the drivers normal eviction_valuable path is run. Reviewed-by: Maarten Lankhorst <[email protected]> Cc: Christian König <[email protected]> Signed-off-by: Thomas Hellström <[email protected]> Acked-by: Christian König <[email protected]> Link: https://lore.kernel.org/r/[email protected] Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-06-07drm/ttm: Document and optimize ttm_bo_pipeline_gutting()Thomas Hellström2-15/+59
If the bo is idle when calling ttm_bo_pipeline_gutting(), we unnecessarily create a ghost object and push it out to delayed destroy. Fix this by adding a path for idle, and document the function. Also avoid having the bo end up in a bad state vulnerable to user-space triggered kernel BUGs if the call to ttm_tt_create() fails. Finally reuse ttm_bo_pipeline_gutting() in ttm_bo_evict(). Cc: Christian König <[email protected]> Signed-off-by: Thomas Hellström <[email protected]> Reviewed-by: Christian König <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2021-06-07drm/ttm: Use drm_memcpy_from_wc for TTM bo movesThomas Hellström1-16/+3
Use fast wc memcpy for reading out of wc memory for TTM bo moves. Cc: Dave Airlie <[email protected]> Cc: Christian König <[email protected]> Cc: Daniel Vetter <[email protected]> Signed-off-by: Thomas Hellström <[email protected]> Reviewed-by: Christian König <[email protected]> #v4 Link: https://lore.kernel.org/r/[email protected] Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-06-07drm/ttm: Add a generic TTM memcpy move for page-based iomemThomas Hellström4-181/+371
The internal ttm_bo_util memcpy uses ioremap functionality, and while it probably might be possible to use it for copying in- and out of sglist represented io memory, using io_mem_reserve() / io_mem_free() callbacks, that would cause problems with fault(). Instead, implement a method mapping page-by-page using kmap_local() semantics. As an additional benefit we then avoid the occasional global TLB flushes of ioremap() and consuming ioremap space, elimination of a critical point of failure and with a slight change of semantics we could also push the memcpy out async for testing and async driver development purposes. A special linear iomem iterator is introduced internally to mimic the old ioremap behaviour for code-paths that can't immediately be ported over. This adds to the code size and should be considered a temporary solution. Looking at the code we have a lot of checks for iomap tagged pointers. Ideally we should extend the core memremap functions to also accept uncached memory and kmap_local functionality. Then we could strip a lot of code. Cc: Christian König <[email protected]> Signed-off-by: Thomas Hellström <[email protected]> Reviewed-by: Christian König <[email protected]> Link: https://lore.kernel.org/r/[email protected]
2021-06-07drm/ttm: fix missing res assignment in ttm_range_man_allocChristian König1-4/+6
That somehow got missing. Signed-off-by: Christian König <[email protected]> Reported-by: Thomas Hellström <[email protected]> Reviewed-by: Thomas Hellström <[email protected]> Fixes: cb1c81467af3 ("drm/ttm: flip the switch for driver allocated resources v2") Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-06-06dma-buf: drop the _rcu postfix on function names v3Christian König1-9/+9
The functions can be called both in _rcu context as well as while holding the lock. v2: add some kerneldoc as suggested by Daniel v3: fix indentation Signed-off-by: Christian König <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]> Acked-by: Daniel Vetter <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-06-06dma-buf: rename and cleanup dma_resv_get_list v2Christian König1-1/+1
When the comment needs to state explicitly that this is doesn't get a reference to the object then the function is named rather badly. Rename the function and use it in even more places. v2: use dma_resv_shared_list as new name Signed-off-by: Christian König <[email protected]> Acked-by: Daniel Vetter <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-06-06dma-buf: rename and cleanup dma_resv_get_excl v3Christian König1-1/+1
When the comment needs to state explicitly that this doesn't get a reference to the object then the function is named rather badly. Rename the function and use rcu_dereference_check(), this way it can be used from both rcu as well as lock protected critical sections. v2: improve kerneldoc as suggested by Daniel v3: use dma_resv_excl_fence as function name Signed-off-by: Christian König <[email protected]> Acked-by: Daniel Vetter <[email protected]> Reviewed-by: Jason Ekstrand <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-06-04drm/ttm: flip the switch for driver allocated resources v2Christian König3-38/+15
Instead of both driver and TTM allocating memory finalize embedding the ttm_resource object as base into the driver backends. v2: fix typo in vmwgfx grid mgr and double init in amdgpu_vram_mgr.c Signed-off-by: Christian König <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-06-04drm/ttm: flip over the sys manager to self allocated nodesChristian König1-0/+7
Make sure to allocate a resource object here. Signed-off-by: Christian König <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-06-04drm/ttm: flip over the range manager to self allocated nodesChristian König2-24/+58
Start with the range manager to make the resource object the base class for the allocated nodes. While at it cleanup a lot of the code around that. Signed-off-by: Christian König <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-06-04drm/ttm: allocate resource object instead of embedding it v2Christian König3-85/+72
To improve the handling we want the establish the resource object as base class for the backend allocations. v2: add missing error handling Signed-off-by: Christian König <[email protected]> Acked-by: Thomas Hellström <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-06-03drm/ttm/ttm_tt: Demote non-conformant kernel-doc headerLee Jones1-1/+1
Fixes the following W=1 kernel build warning(s): drivers/gpu/drm/ttm/ttm_tt.c:398: warning: Function parameter or member 'num_pages' not described in 'ttm_tt_mgr_init' drivers/gpu/drm/ttm/ttm_tt.c:398: warning: Function parameter or member 'num_dma32_pages' not described in 'ttm_tt_mgr_init' Cc: Christian Koenig <[email protected]> Cc: Huang Rui <[email protected]> Cc: David Airlie <[email protected]> Cc: Daniel Vetter <[email protected]> Cc: [email protected] Signed-off-by: Lee Jones <[email protected]> Signed-off-by: Daniel Vetter <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-06-02drm/ttm: rename bo->mem and make it a pointerChristian König3-52/+56
When we want to decouble resource management from buffer management we need to be able to handle resources separately. Add a resource pointer and rename bo->mem so that all code needs to change to access the pointer instead. No functional change. Signed-off-by: Christian König <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-05-26drm/ttm: Remove ttm_bo_mmap() and friendsThomas Zimmermann1-53/+0
The function ttm_bo_mmap is unused. Remove it and it's helpers; including the verify_access callback in struct ttm_device_funcs. Signed-off-by: Thomas Zimmermann <[email protected]> Reviewed-by: Christian König <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-05-26drm/ttm: Don't override vm_ops callbacks, if setThomas Zimmermann1-1/+6
Drivers may want to set their own callbacks for a VM area. Only set TTM's callbacks if the vm_ops field is clear. Signed-off-by: Thomas Zimmermann <[email protected]> Reviewed-by: Christian König <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-05-26drm/ttm: Skip swapout if ttm object is not populatedxinhui pan1-1/+1
Swapping a ttm object which has no backend pages makes no sense. Suggested-by: Christian König <[email protected]> Signed-off-by: xinhui pan <[email protected]> Reviewed-by: Christian König <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected] CC: [email protected] Signed-off-by: Christian König <[email protected]>
2021-05-20drm/ttm: Explain why ttm_bo_add_move_fence uses a shared slotDaniel Vetter1-1/+3
Motivated because I got confused and Christian confirmed why this works. I think this is non-obvious enough that it merits a slightly longer comment. Acked-by: Huang Rui <[email protected]> Reviewed-by: Christian König <[email protected]> Cc: Christian König <[email protected]> Cc: Christian Koenig <[email protected]> Cc: Huang Rui <[email protected]> Cc: Thomas Hellström <[email protected]> Signed-off-by: Daniel Vetter <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-05-19drm/ttm: Remap all page faults to per process dummy page.Andrey Grodzovsky1-1/+53
On device removal reroute all CPU mappings to dummy page. v3: Remove loop to find DRM file and instead access it by vma->vm_file->private_data. Move dummy page installation into a separate function. v4: Map the entire BOs VA space into on demand allocated dummy page on the first fault for that BO. v5: Remove duplicate return. v6: Polish ttm_bo_vm_dummy_page, remove superfluous code. Signed-off-by: Andrey Grodzovsky <[email protected]> Reviewed-by: Christian König <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-05-04drm/ttm: fix warning in new sys manChristian König1-0/+2
Include the header for the prototype. Signed-off-by: Christian König <[email protected]> Reported-by: kernel test robot <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-05-03drm/ttm: properly allocate sys resource during swapoutChristian König1-5/+7
Drop the special handling here. Signed-off-by: Christian König <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-05-03drm/ttm: always initialize the full ttm_resource v2Christian König3-25/+16
Init all fields in ttm_resource_alloc() when we create a new resource. v2: use place->mem_type instead of res->mem_type Signed-off-by: Christian König <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-05-03drm/ttm: add ttm_sys_manager v3Christian König5-25/+47
Add a separate manager for the system domain and make function tables mandatory. v2: debug is still optional v3: return void during init Signed-off-by: Christian König <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-05-03drm/ttm: cleanup ttm_agp_backendChristian König1-4/+4
Audit the includes and stop accessing the internal drm_mm_node. The ttm_resource::start is the same value as the drm_mm_node::start. Signed-off-by: Christian König <[email protected]> Reviewed-by: Michael J. Ruhl <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-04-30Merge tag 'drm-misc-next-fixes-2021-04-29' of ↵Dave Airlie2-1/+3
git://anongit.freedesktop.org/drm/drm-misc into drm-next Two patches in drm-misc-next-fixes this week, one to fix the error handling in TTM when a BO can't be swapped out and one to prevent a wrong dereference in efifb. Signed-off-by: Dave Airlie <[email protected]> From: Maxime Ripard <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/20210429090308.k3fuqvenf6vupfmg@gilmour
2021-04-23drm/ttm: move the page_alignment into the BO v2Christian König2-5/+3
The alignment is a constant property and shouldn't change. v2: move documentation as well as suggested by Matthew. Signed-off-by: Christian König <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-04-23drm/ttm: minor range manager coding style clean upsChristian König1-18/+17
No functional changes, just removing the leftovers from the redesign. Signed-off-by: Christian König <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-04-23drm/ttm: remove special handling for non GEM driversChristian König1-11/+0
vmwgfx is the only driver actually using this. Move the handling into the driver instead. Signed-off-by: Christian König <[email protected]> Acked-by: Huang Rui <[email protected]> Reviewed-by: Zack Rusin <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-04-23drm/ttm: fix error handling if no BO can be swapped out v4Shiwu Zhang2-1/+3
In case that all pre-allocated BOs are busy, just continue to populate BOs since likely half of system memory in total is still free. v4 (chk): fix code moved to VMWGFX as well Signed-off-by: Shiwu Zhang <[email protected]> Reviewed-by: Christian König <[email protected]> Signed-off-by: Christian König <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-04-23drm/ttm: fix error handling if no BO can be swapped out v4Shiwu Zhang2-1/+3
In case that all pre-allocated BOs are busy, just continue to populate BOs since likely half of system memory in total is still free. v4 (chk): fix code moved to VMWGFX as well Signed-off-by: Shiwu Zhang <[email protected]> Reviewed-by: Christian König <[email protected]> Signed-off-by: Christian König <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-04-23Merge tag 'drm-misc-next-fixes-2021-04-22' of ↵Dave Airlie1-10/+19
git://anongit.freedesktop.org/drm/drm-misc into drm-next A few fixes for the next merge window, with some build fixes for anx7625 and lt8912b bridges, incorrect error handling for lt8912b and TTM, and one fix for TTM page limit accounting. Signed-off-by: Dave Airlie <[email protected]> From: Maxime Ripard <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/20210422163329.dvbuwre3akwdmzjt@gilmour
2021-04-22drm/ttm/ttm_device: Demote kernel-doc abusesLee Jones1-2/+2
Fixes the following W=1 kernel build warning(s): drivers/gpu/drm/ttm/ttm_device.c:42: warning: Function parameter or member 'ttm_global_mutex' not described in 'DEFINE_MUTEX' drivers/gpu/drm/ttm/ttm_device.c:42: warning: expecting prototype for ttm_global_mutex(). Prototype was for DEFINE_MUTEX() instead drivers/gpu/drm/ttm/ttm_device.c:112: warning: Function parameter or member 'ctx' not described in 'ttm_global_swapout' drivers/gpu/drm/ttm/ttm_device.c:112: warning: Function parameter or member 'gfp_flags' not described in 'ttm_global_swapout' drivers/gpu/drm/ttm/ttm_device.c:112: warning: expecting prototype for A buffer object shrink method that tries to swap out the first(). Prototype was for ttm_global_swapout() instead Cc: Christian Koenig <[email protected]> Cc: Huang Rui <[email protected]> Cc: David Airlie <[email protected]> Cc: Daniel Vetter <[email protected]> Cc: [email protected] Signed-off-by: Lee Jones <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected] Reviewed-by: Christian König <[email protected]> Signed-off-by: Christian König <[email protected]>
2021-04-22drm/ttm/ttm_bo: Fix incorrectly documented function 'ttm_bo_cleanup_refs'Lee Jones1-1/+1
Fixes the following W=1 kernel build warning(s): drivers/gpu/drm/ttm/ttm_bo.c:293: warning: expecting prototype for function ttm_bo_cleanup_refs(). Prototype was for ttm_bo_cleanup_refs() instead Cc: Christian Koenig <[email protected]> Cc: Huang Rui <[email protected]> Cc: David Airlie <[email protected]> Cc: Daniel Vetter <[email protected]> Cc: Sumit Semwal <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Signed-off-by: Lee Jones <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected] Reviewed-by: Christian König <[email protected]> Signed-off-by: Christian König <[email protected]>
2021-04-21drm/ttm: Don't count pages in SG BOs against pages_limitFelix Kuehling1-9/+18
Pages in SG BOs were not allocated by TTM. So don't count them against TTM's pages limit. Signed-off-by: Felix Kuehling <[email protected]> Reviewed-by: Christian König <[email protected]> Signed-off-by: Christian König <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-04-21drm/ttm: fix return value checkChristian König1-1/+1
The function returns the number of swapped pages here. Only abort when we get a negative error code. Signed-off-by: Christian König <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-04-19drm/ttm: warn stricter about freeing pinned BOsChristian König1-1/+3
So far we only warned when the BOs where pinned and not idle. Also warn if we see a pinned BO in general. Signed-off-by: Christian König <[email protected]> Acked-by: Leo Liu <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-04-14drm/ttm: Don't count pages in SG BOs against pages_limitFelix Kuehling1-9/+18
Pages in SG BOs were not allocated by TTM. So don't count them against TTM's pages limit. Signed-off-by: Felix Kuehling <[email protected]> Reviewed-by: Christian König <[email protected]> Signed-off-by: Christian König <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-04-12drm/ttm: re-add debugfs tt_shrink fileChristian König1-0/+20
That got lost when we moved back to a static limit. Signed-off-by: Christian König <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-04-12drm/ttm: fix return value checkChristian König1-1/+1
The function returns the number of swapped pages here. Only abort when we get a negative error code. Signed-off-by: Christian König <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-04-09drm/ttm: make global mutex and use count staticChristian König1-2/+2
Only needed during device hot plug and remove and not exported. Signed-off-by: Christian König <[email protected]> Suggested-by: Bernard <[email protected]> Acked-by: Daniel Vetter <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-04-08drm/ttm: ioremap buffer according to TTM mem caching settingOak Zeng1-0/+14
If tbo.mem.bus.caching is cached, buffer is intended to be mapped as cached from CPU. Map it with ioremap_cache. This wasn't necessary before as device memory was never mapped as cached from CPU side. It becomes necessary for aldebaran as device memory is mapped cached from CPU. Signed-off-by: Oak Zeng <[email protected]> Reviewed-by: Christian Konig <[email protected]> Signed-off-by: Alex Deucher <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected] Signed-off-by: Christian König <[email protected]>
2021-04-08drm/ttm: Ignore signaled move fencesFelix Kuehling1-1/+2
Move fences that have already signaled should not prevent memory allocations with no_wait_gpu. Signed-off-by: Felix Kuehling <[email protected]> Reviewed-by: Christian König <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected] Signed-off-by: Christian König <[email protected]>
2021-03-29drm/ttm: switch back to static allocation limits for nowChristian König2-74/+52
The shrinker based approach still has some flaws. Especially that we need temporary pages to free up the pages allocated to the driver is problematic in a shrinker. Signed-off-by: Christian König <[email protected]> Acked-by: Daniel Vetter <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-03-26drm/ttm: fix invalid NULL derefChristian König1-3/+3
The BO might be NULL in this function, use the bdev directly. Signed-off-by: Christian König <[email protected]> Reported-by: Colin Ian King <[email protected]> Reviewed-by: Colin Ian King <[email protected]> Fixes: a1f091f8ef2b ("drm/ttm: switch to per device LRU lock") Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2021-03-24drm/ttm: switch to per device LRU lockChristian König4-44/+34
Instead of having a global lock for potentially less contention. Signed-off-by: Christian König <[email protected]> Tested-by: Nirmoy Das <[email protected]> Reviewed-by: Huang Rui <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: https://patchwork.freedesktop.org/patch/424010/
2021-03-24drm/ttm: remove swap LRU v3Christian König3-45/+45
Instead evict round robin from each devices SYSTEM and TT domain. v2: reorder num_pages access reported by Dan's script v3: fix rebase fallout, num_pages should be 32bit Signed-off-by: Christian König <[email protected]> Tested-by: Nirmoy Das <[email protected]> Reviewed-by: Huang Rui <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: https://patchwork.freedesktop.org/patch/424009/
2021-03-24drm/ttm: move swapout logic around v3Christian König3-42/+46
Move the iteration of the global lru into the new function ttm_global_swapout() and use that instead in drivers. v2: consistently return int v3: fix build fail Signed-off-by: Christian König <[email protected]> Tested-by: Nirmoy Das <[email protected]> Reviewed-by: Huang Rui <[email protected]> Reviewed-by: Matthew Auld <[email protected]> Link: https://patchwork.freedesktop.org/patch/424008/
2021-03-16Merge tag 'drm-misc-next-2021-03-03' of ↵Dave Airlie14-1132/+513
git://anongit.freedesktop.org/drm/drm-misc into drm-next drm-misc-next for 5.13: UAPI Changes: Cross-subsystem Changes: Core Changes: - %p4cc printk format modifier - atomic: introduce drm_crtc_commit_wait, rework atomic plane state helpers to take the drm_commit_state structure - dma-buf: heaps rework to return a struct dma_buf - simple-kms: Add plate state helpers - ttm: debugfs support, removal of sysfs Driver Changes: - Convert drivers to shadow plane helpers - arc: Move to drm/tiny - ast: cursor plane reworks - gma500: Remove TTM and medfield support - mxsfb: imx8mm support - panfrost: MMU IRQ handling rework - qxl: rework to better handle resources deallocation, locking - sun4i: Add alpha properties for UI and VI layers - vc4: RPi4 CEC support - vmwgfx: doc cleanup Signed-off-by: Dave Airlie <[email protected]> From: Maxime Ripard <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/20210303100600.dgnkadonzuvfnu22@gilmour
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