drm/i915/guc: Unblock GuC submission on Gen11+

Unblock GuC submission on Gen11+ platforms.

v2:
 (Martin Peres / John H)
  - Delete debug message when GuC is disabled by default on certain
    platforms
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210727002348.97202-34-matthew.brost@intel.com

drivers/gpu/drm/i915/gt/uc/intel_guc.h

@@ -55,6 +55,7 @@ struct intel_guc {
 	struct ida guc_ids;
 	struct list_head guc_id_list;
 
+	bool submission_supported;
 	bool submission_selected;
 
 	struct i915_vma *ads_vma;

drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c

@@ -2543,6 +2543,13 @@ void intel_guc_submission_disable(struct intel_guc *guc)
 	/* Note: By the time we're here, GuC may have already been reset */
 }
 
+static bool __guc_submission_supported(struct intel_guc *guc)
+{
+	/* GuC submission is unavailable for pre-Gen11 */
+	return intel_guc_is_supported(guc) &&
+	       GRAPHICS_VER(guc_to_gt(guc)->i915) >= 11;
+}
+
 static bool __guc_submission_selected(struct intel_guc *guc)
 {
 	struct drm_i915_private *i915 = guc_to_gt(guc)->i915;
@@ -2555,6 +2562,7 @@ static bool __guc_submission_selected(struct intel_guc *guc)
 
 void intel_guc_submission_init_early(struct intel_guc *guc)
 {
+	guc->submission_supported = __guc_submission_supported(guc);
 	guc->submission_selected = __guc_submission_selected(guc);
 }
 

drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h

@@ -38,8 +38,7 @@ int intel_guc_wait_for_pending_msg(struct intel_guc *guc,
 
 static inline bool intel_guc_submission_is_supported(struct intel_guc *guc)
 {
-	/* XXX: GuC submission is unavailable for now */
-	return false;
+	return guc->submission_supported;
 }
 
 static inline bool intel_guc_submission_is_wanted(struct intel_guc *guc)

drivers/gpu/drm/i915/gt/uc/intel_uc.c

@@ -34,8 +34,14 @@ static void uc_expand_default_options(struct intel_uc *uc)
 		return;
 	}
 
-	/* Default: enable HuC authentication only */
-	i915->params.enable_guc = ENABLE_GUC_LOAD_HUC;
+	/* Intermediate platforms are HuC authentication only */
+	if (IS_DG1(i915) || IS_ALDERLAKE_S(i915)) {
+		i915->params.enable_guc = ENABLE_GUC_LOAD_HUC;
+		return;
+	}
+
+	/* Default: enable HuC authentication and GuC submission */
+	i915->params.enable_guc = ENABLE_GUC_LOAD_HUC | ENABLE_GUC_SUBMISSION;
 }
 
 /* Reset GuC providing us with fresh state for both GuC and HuC.
@@ -313,9 +319,6 @@ static int __uc_init(struct intel_uc *uc)
 	if (i915_inject_probe_failure(uc_to_gt(uc)->i915))
 		return -ENOMEM;
 
-	/* XXX: GuC submission is unavailable for now */
-	GEM_BUG_ON(intel_uc_uses_guc_submission(uc));
-
 	ret = intel_guc_init(guc);
 	if (ret)
 		return ret;