drm/i915/guc: doorbell reset should avoid used doorbells

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guc_init_doorbell_hw() borrows the (currently single) GuC client to use
in reinitialising ALL the doorbell registers (as the hardware doesn't
reset them when the GuC is reset). As a prerequisite for accommodating
multiple clients, it should only reset doorbells that are supposed to be
disabled, avoiding those that are marked as in use by any client.

Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

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Dave Gordon 2016-08-09 15:19:19 +01:00 • committed by Tvrtko Ursulin

parent dbd6ef29a7

commit 8888cd0154

1 changed files with 7 additions and 1 deletions

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drivers/gpu/drm/i915/i915_guc_submission.c

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