On Wed, Jul 7, 2021 at 10:57 AM Rob Clark robdclark@gmail.com wrote:
From: Rob Clark robdclark@chromium.org
It turns out that when the display is enabled by the bootloader, we can get some transient iommu faults from the display. Which doesn't go over too well when we install a fault handler that is gpu specific. To avoid this, defer installing the fault handler until we get around to setting up per-process pgtables (which is adreno_smmu specific). The arm-smmu fallback error reporting is sufficient for reporting display related faults (and in fact was all we had prior to f8f934c180f629bb927a04fd90d)
Reported-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org Reported-by: Yassine Oudjana y.oudjana@protonmail.com Fixes: 2a574cc05d38 ("drm/msm: Improve the a6xx page fault handler") Signed-off-by: Rob Clark robdclark@chromium.org Tested-by: John Stultz john.stultz@linaro.org
Hey folks! Just wanted to follow up on this, as it's still missing from 5.14-rc3 and is critical for resolving a boot regression on db845c. Is there anything keeping this from heading upstream?
thanks -john