[PATCH 1/2] drm/msm/gpu: Wait for idle before suspending

[AngeloGioacchino Del Regno]

Il 06/01/22 19:14, Rob Clark ha scritto:
> From: Rob Clark <robdclark at chromium.org>
> 
> System suspend uses pm_runtime_force_suspend(), which cheekily bypasses
> the runpm reference counts.  This doesn't actually work so well when the
> GPU is active.  So add a reasonable delay waiting for the GPU to become
> idle.
> 
> Alternatively we could just return -EBUSY in this case, but that has the
> disadvantage of causing system suspend to fail.
> 
> Signed-off-by: Rob Clark <robdclark at chromium.org>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>