iommu: arm-smmu-qcom: Ensure smmu is powered up in set_ttbr0_cfg

Browse source

arm_smmu_write_context_bank() assumes it is being called with RPM
active, but it turns out that is not guaranteed in the path from
qcom_adreno_smmu_set_ttbr0_cfg(), so it's possible for the register
writes to get lost when configuring the context bank while the GPU is
idle, leading to page faults later.
Add the RPM calls here to make sure the SMMU is active before we touch
it.

Signed-off-by: Anna Maniscalco <anna.maniscalco2000@gmail.com>
Reviewed-by: Rob Clark <rob.clark@oss.qualcomm.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>

...

This commit is contained in:

Anna Maniscalco 2026-05-07 17:43:15 +02:00 • committed by Will Deacon

parent 8bcad9e3a6

commit 8a0aab012b

1 changed files with 9 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

9

drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c

View file