A-b from me; let's see what others say.
On Mon, Aug 26, 2019 at 05:33:09PM -0500, Rob Herring wrote:
> With further testing of recent changes with lockdep identified some
> locking issues. Avoiding lockdep issues means we need to avoid some
> locks in panfrost_mmu_unmap which in turn means avoiding runtime PM
> resume. In the process of re-working runtime PM several runtime PM
> and locking clean-ups have been identified.
>
> v3:
> - Applied patches 1, 4, 5, and 6
> - Fix race in job timeout handling with ISR
> - Remove some no longer needed locks
> - Fix panfrost_mmu_unmap when autosuspend delay is > 0
> - Disable AS MMU when freeing page tables
>
> v2:
> - Drop already applied 'drm/panfrost: Fix sleeping while atomic in
>panfrost_gem_open'
> - Runtime PM clean-ups
> - Keep panfrost_gem_purge and use mutex_trylock there
> - Rework panfrost_mmu_unmap runtime PM
>
> Rob
>
> Rob Herring (8):
> drm/panfrost: Rework runtime PM initialization
> drm/panfrost: Hold runtime PM reference until jobs complete
> drm/panfrost: Remove unnecessary mmu->lock mutex
> drm/panfrost: Rework page table flushing and runtime PM interaction
> drm/panfrost: Split mmu_hw_do_operation into locked and unlocked
> version
> drm/panfrost: Add cache/TLB flush before switching address space
> drm/panfrost: Flush and disable address space when freeing page tables
> drm/panfrost: Remove unnecessary hwaccess_lock spin_lock
>
> drivers/gpu/drm/panfrost/panfrost_device.c | 10 ---
> drivers/gpu/drm/panfrost/panfrost_device.h | 3 -
> drivers/gpu/drm/panfrost/panfrost_drv.c| 10 ++-
> drivers/gpu/drm/panfrost/panfrost_job.c| 43 ++
> drivers/gpu/drm/panfrost/panfrost_mmu.c| 91 ++
> 5 files changed, 76 insertions(+), 81 deletions(-)
>
> --
> 2.20.1
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