drm/i915/guc: Wait for doorbell to be inactive before deallocating

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Doorbell release flow requires that we wait for GEN8_DRB_VALID bit to go
to zero after updating db_status before we call the GuC to release the
doorbell.

Kudos to Daniele for finding this out.

v2: WARN instead of DRM_ERROR (Joonas)

Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

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Oscar Mateo 2017-03-22 10:39:51 -07:00 • committed by Joonas Lahtinen

parent 0d76812614

commit ed2ec71f9f

1 changed files with 10 additions and 0 deletions

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drivers/gpu/drm/i915/i915_guc_submission.c

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