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authorImre Deak <imre.deak@intel.com>2021-03-22 22:28:17 +0200
committerRodrigo Vivi <rodrigo.vivi@intel.com>2021-03-24 09:12:07 -0400
commit8840e3bd981f128846b01c12d3966d115e8617c9 (patch)
tree3b5db98666b256fa91493d782a99f746b5985267 /drivers/gpu/drm/i915/display/intel_dp_aux_backlight.h
parentb61fde1beb6b1847f1743e75f4d9839acebad76a (diff)
drm/i915: Fix the GT fence revocation runtime PM logic
To optimize some task deferring it until runtime resume unless someone holds a runtime PM reference (because in this case the task can be done w/o the overhead of runtime resume), we have to use the runtime PM get-if-active logic: If the runtime PM usage count is 0 (and so get-if-in-use would return false) the runtime suspend handler is not necessarily called yet (it could be just pending), so the device is not necessarily powered down, and so the runtime resume handler is not guaranteed to be called. The fence revocation depends on the above deferral, so add a get-if-active helper and use it during fence revocation. v2: - Add code comment explaining the fence reg programming deferral logic to i915_vma_revoke_fence(). (Chris) - Add Cc: stable and Fixes: tags. (Chris) - Fix the function docbook comment. Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: <stable@vger.kernel.org> # v4.12+ Fixes: 181df2d458f3 ("drm/i915: Take rpm wakelock for releasing the fence on unbind") Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Imre Deak <imre.deak@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210322204223.919936-1-imre.deak@intel.com (cherry picked from commit 9d58aa46291d4d696bb1eac3436d3118f7bf2573) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dp_aux_backlight.h')
0 files changed, 0 insertions, 0 deletions