[PATCH 6/7] drm/i915/guc: Don't touch WOPCM if we're not using GuC

[Michał Winiarski]

We probably shouldn't print out WOPCM size on platforms that don't have
GuC. We also want to make sure we don't hit any asserts if user explicitly
sets enable_guc != 0 on non-guc platforms.

Signed-off-by: Michał Winiarski <michal.winiarski at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Jackie Li <yaodong.li at intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
---
 drivers/gpu/drm/i915/intel_wopcm.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_wopcm.c b/drivers/gpu/drm/i915/intel_wopcm.c
index 10d8e30c6291..d203837eb470 100644
--- a/drivers/gpu/drm/i915/intel_wopcm.c
+++ b/drivers/gpu/drm/i915/intel_wopcm.c
@@ -69,6 +69,9 @@
  */
 void intel_wopcm_init_early(struct intel_wopcm *wopcm)
 {
+	if (!HAS_GUC(wopcm_to_i915(wopcm)))
+		return;
+
 	wopcm->size = GEN9_WOPCM_SIZE;
 
 	DRM_DEBUG_DRIVER("WOPCM size: %uKiB\n", wopcm->size / 1024);
@@ -282,8 +285,12 @@ static int wopcm_guc_region_init(struct intel_wopcm *wopcm)
  */
 int intel_wopcm_init(struct intel_wopcm *wopcm)
 {
+	struct drm_i915_private *dev_priv = wopcm_to_i915(wopcm);
 	int err;
 
+	if (!HAS_GUC(dev_priv) || !USES_GUC(dev_priv))
+		return 0;
+
 	GEM_BUG_ON(!wopcm->size);
 
 	err = wopcm_guc_region_init(wopcm);
@@ -316,10 +323,9 @@ void intel_wopcm_init_hw(struct intel_wopcm *wopcm)
 {
 	struct drm_i915_private *dev_priv = wopcm_to_i915(wopcm);
 
-	if (!USES_GUC(dev_priv))
+	if (!HAS_GUC(dev_priv) || !USES_GUC(dev_priv))
 		return;
 
-	GEM_BUG_ON(!HAS_GUC(dev_priv));
 	GEM_BUG_ON(!wopcm->guc.size);
 	GEM_BUG_ON(!wopcm->guc.base);
 
-- 
2.14.3