[PATCH 14/21] drm/i915/guc: Remove GuC submission disable from i915_driver_unload

Sagar Arun Kamble sagar.a.kamble at intel.com
Thu Oct 12 04:30:07 UTC 2017

Earlier patch disabled GuC submission in i915_gem_suspend path.
This will destroy the client which will be setup back again during
resume. Unload relies on gem suspend hence we don't need to disable GuC
submission again during intel_uc_fini_hw (although it is not harm
calling at this point since we have added status checks.)
Also this location of disabling GuC submission was issue since it was
being done after GPU reset happening in i915_gem_suspend during

v2: Rebase w.r.t removal of GuC code restructuring. Added struct_mutex
protection for i915_guc_submission_disable.

v3: Rebase w.r.t updated GuC suspend function name.

v4: Added lockdep assert in i915_guc_submission_enable/disable.
Refined intel_uc_suspend to remove unnecessary locals and simplify
return. (Michal Winiarski)
Removed comment in guc_client_free about ignoring failure for
destroy_doorbell. (Oscar)
Rebase w.r.t i915_modparams change.

v5: Removed lockdep assert as mutex is needed by internal functions
which already have the asserts. (Chris)
Removed enable_guc_submission check for disabling GuC submission. (Chris)

v6: Rebase with enable_guc_submission related change done in earlier
newly introduced patches.

v7: Fixed intel_uc_resume to call intel_uc_runtime_resume and added
comment about need to enable submission later if needed. Commit message
updated. (Sagar)

v8. Rebase.

v9: Rebase. Updated comment.

v10: With uC suspend/resume functionality updated in the earlier patch
this patch merely fixes the unload path.

Signed-off-by: Sagar Arun Kamble <sagar.a.kamble at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: Michał Winiarski <michal.winiarski at intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Reviewed-by: Michał Winiarski <michal.winiarski at intel.com> #9
 drivers/gpu/drm/i915/i915_guc_submission.c | 3 ---
 drivers/gpu/drm/i915/intel_uc.c            | 2 --
 2 files changed, 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c b/drivers/gpu/drm/i915/i915_guc_submission.c
index ce2f0ed..efa699a 100644
--- a/drivers/gpu/drm/i915/i915_guc_submission.c
+++ b/drivers/gpu/drm/i915/i915_guc_submission.c
@@ -844,9 +844,6 @@ static void guc_client_free(struct i915_guc_client *client)
 	 * Be sure to drop any locks
-	/* FIXME: in many cases, by the time we get here the GuC has been
-	 * reset, so we cannot destroy the doorbell properly. Ignore the
-	 * error message for now */
 	guc_stage_desc_fini(client->guc, client);
diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
index 092bdea..7874de6 100644
--- a/drivers/gpu/drm/i915/intel_uc.c
+++ b/drivers/gpu/drm/i915/intel_uc.c
@@ -273,8 +273,6 @@ void intel_uc_fini_hw(struct drm_i915_private *dev_priv)
-	i915_guc_submission_disable(dev_priv);

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