drm/i915/guc: Enable PXP GuC autoteardown flow

This feature flag enables GuC autoteardown which allows for a grace
period before session teardown.

Also add a HAS_PXP() helper to share with the other place that wants
to check.

Signed-off-by: Juston Li <[email protected]>
Signed-off-by: John Harrison <[email protected]>
Reviewed-by: Alan Previn <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

Author: Juston Li

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

@@ -239,8 +239,16 @@ static u32 guc_ctl_debug_flags(struct intel_guc *guc)
 
 static u32 guc_ctl_feature_flags(struct intel_guc *guc)
 {
+	struct intel_gt *gt = guc_to_gt(guc);
 	u32 flags = 0;
 
+	/*
+	 * Enable PXP GuC autoteardown flow.
+	 * NB: MTL does things differently.
+	 */
+	if (HAS_PXP(gt->i915) && !IS_METEORLAKE(gt->i915))
+		flags |= GUC_CTL_ENABLE_GUC_PXP_CTL;
+
 	if (!intel_guc_submission_is_used(guc))
 		flags |= GUC_CTL_DISABLE_SCHEDULER;
 

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

@@ -105,6 +105,7 @@
 #define   GUC_WA_ENABLE_TSC_CHECK_ON_RC6	BIT(22)
 
 #define GUC_CTL_FEATURE			2
+#define   GUC_CTL_ENABLE_GUC_PXP_CTL	BIT(1)
 #define   GUC_CTL_ENABLE_SLPC		BIT(2)
 #define   GUC_CTL_DISABLE_SCHEDULER	BIT(14)
 

drivers/gpu/drm/i915/i915_drv.h

@@ -691,6 +691,9 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
 
 #define HAS_RPS(i915)	(INTEL_INFO(i915)->has_rps)
 
+#define HAS_PXP(i915) \
+	(IS_ENABLED(CONFIG_DRM_I915_PXP) && INTEL_INFO(i915)->has_pxp)
+
 #define HAS_HECI_PXP(i915) \
 	(INTEL_INFO(i915)->has_heci_pxp)
 

drivers/gpu/drm/i915/pxp/intel_pxp.c

@@ -170,7 +170,7 @@ static struct intel_gt *find_gt_for_required_teelink(struct drm_i915_private *i9
 
 static struct intel_gt *find_gt_for_required_protected_content(struct drm_i915_private *i915)
 {
-	if (!IS_ENABLED(CONFIG_DRM_I915_PXP) || !INTEL_INFO(i915)->has_pxp)
+	if (!HAS_PXP(i915))
 		return NULL;
 
 	/*