]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
drm/i915/psr: Chase psr.enabled only under the psr.lock
authorChris Wilson <chris@chris-wilson.co.uk>
Thu, 5 Apr 2018 11:49:15 +0000 (12:49 +0100)
committerChris Wilson <chris@chris-wilson.co.uk>
Tue, 10 Apr 2018 10:38:42 +0000 (11:38 +0100)
commitdaeb725e919c0d2d4b628aeaa1fa053125f888b2
tree50e2a2fbe5b61fe7dd7d96add9709e08985310b8
parent1b85147b4b8fb90da51b6e94a3e6c30469bf1de1
drm/i915/psr: Chase psr.enabled only under the psr.lock

Inside the psr work function, we want to wait for PSR to idle first and
wish to do so without blocking the normal modeset path, so we do so
without holding the PSR lock. However, we first have to find which pipe
PSR was enabled on, which requires chasing into the PSR struct and
requires locking to prevent intel_psr_disable() from concurrently
setting our pointer to NULL.

Fixes: 995d30477496 ("drm/i915: VLV/CHV PSR Software timer mode")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Durgadoss R <durgadoss.r@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: <stable@vger.kernel.org> # v4.0+
Reviewed-by: Jose Roberto de Souza <jose.souza@intel.com>
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180405114915.29609-1-chris@chris-wilson.co.uk
drivers/gpu/drm/i915/intel_psr.c