drm/msm/a6xx: Ensure CX collapse during gpu recovery

Browse source

Because there could be transient votes from other drivers/tz/hyp which
may keep the cx gdsc enabled, we should poll until cx gdsc collapses.
We can use the reset framework to poll for cx gdsc collapse from gpucc
clk driver.

This feature requires support from the platform's gpucc driver.

Signed-off-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Patchwork: https://patchwork.freedesktop.org/patch/498397/
Link: https://lore.kernel.org/r/20220819015030.v5.5.I176567525af2b9439a7e485d0ca130528666a55c@changeid
Signed-off-by: Rob Clark <robdclark@chromium.org>

...

This commit is contained in:

Akhil P Oommen 2022-08-19 01:52:13 +05:30 • committed by Rob Clark

parent f350bfb92b

commit 1f6cca4049

3 changed files with 12 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

4

drivers/gpu/drm/msm/adreno/a6xx_gpu.c

View file

4

drivers/gpu/drm/msm/msm_gpu.c

View file

4

drivers/gpu/drm/msm/msm_gpu.h

View file