drm: msm: a6xx: fix gpu failure after system resume

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On targets where GMU is available, GMU takes over the ownership of GX GDSC
during its initialization. So, move the refcount-get on GX PD before we
initialize the GMU. This ensures that nobody can collapse the GX GDSC
once GMU owns the GX GDSC. This patch fixes some GMU OOB errors seen
during GPU wake up during a system resume.

Reported-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Akhil P Oommen <akhilpo@codeaurora.org>
Tested-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>

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Akhil P Oommen 2020-07-17 20:04:18 +05:30 • committed by Rob Clark

parent 32d3e0fecc

commit 57c0bd517c

1 changed files with 10 additions and 8 deletions

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drivers/gpu/drm/msm/adreno/a6xx_gmu.c

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