drm/xe/guc: Move GuC power control init to "post-hwconfig"

SLPC is not used at "hwconfig" stage. Move the initialization of data
structures used for SLPC to a later point in probe.
Also - move the xe_guc_pc_init_early to happen just prior to initial
"hwconfig" load.

Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240219130530.1406044-3-michal.winiarski@intel.com

drivers/gpu/drm/xe/xe_gt.c

@@ -368,9 +368,6 @@ static int gt_fw_domain_init(struct xe_gt *gt)
 	if (err)
 		goto err_force_wake;
 
-	/* Raise GT freq to speed up HuC/GuC load */
-	xe_guc_pc_init_early(&gt->uc.guc.pc);
-
 	err = xe_uc_init_hwconfig(&gt->uc);
 	if (err)
 		goto err_force_wake;

drivers/gpu/drm/xe/xe_guc.c

@@ -251,7 +251,6 @@ static void guc_fini(struct drm_device *drm, void *arg)
 	struct xe_guc *guc = arg;
 
 	xe_force_wake_get(gt_to_fw(guc_to_gt(guc)), XE_FORCEWAKE_ALL);
-	xe_guc_pc_fini(&guc->pc);
 	xe_uc_fini_hw(&guc_to_gt(guc)->uc);
 	xe_force_wake_put(gt_to_fw(guc_to_gt(guc)), XE_FORCEWAKE_ALL);
 }
@@ -330,10 +329,6 @@ int xe_guc_init(struct xe_guc *guc)
 	if (ret)
 		goto out;
 
-	ret = xe_guc_pc_init(&guc->pc);
-	if (ret)
-		goto out;
-
 	ret = drmm_add_action_or_reset(&gt_to_xe(gt)->drm, guc_fini, guc);
 	if (ret)
 		goto out;
@@ -367,6 +362,10 @@ int xe_guc_init_post_hwconfig(struct xe_guc *guc)
 
 	guc_init_params_post_hwconfig(guc);
 
+	ret = xe_guc_pc_init(&guc->pc);
+	if (ret)
+		return ret;
+
 	return xe_guc_ads_init_post_hwconfig(&guc->ads);
 }
 
@@ -574,6 +573,9 @@ int xe_guc_min_load_for_hwconfig(struct xe_guc *guc)
 
 	xe_guc_ads_populate_minimal(&guc->ads);
 
+	/* Raise GT freq to speed up HuC/GuC load */
+	xe_guc_pc_init_early(&guc->pc);
+
 	ret = __xe_guc_upload(guc);
 	if (ret)
 		return ret;

drivers/gpu/drm/xe/xe_guc_pc.c

@@ -956,10 +956,12 @@ int xe_guc_pc_stop(struct xe_guc_pc *pc)
 
 /**
  * xe_guc_pc_fini - Finalize GuC's Power Conservation component
- * @pc: Xe_GuC_PC instance
+ * @drm: DRM device
+ * @arg: opaque pointer that should point to Xe_GuC_PC instance
  */
-void xe_guc_pc_fini(struct xe_guc_pc *pc)
+static void xe_guc_pc_fini(struct drm_device *drm, void *arg)
 {
+	struct xe_guc_pc *pc = arg;
 	struct xe_device *xe = pc_to_xe(pc);
 
 	if (xe->info.skip_guc_pc) {
@@ -969,9 +971,10 @@ void xe_guc_pc_fini(struct xe_guc_pc *pc)
 		return;
 	}
 
+	xe_force_wake_get(gt_to_fw(pc_to_gt(pc)), XE_FORCEWAKE_ALL);
 	XE_WARN_ON(xe_guc_pc_gucrc_disable(pc));
 	XE_WARN_ON(xe_guc_pc_stop(pc));
-	mutex_destroy(&pc->freq_lock);
+	xe_force_wake_put(gt_to_fw(pc_to_gt(pc)), XE_FORCEWAKE_ALL);
 }
 
 /**
@@ -985,11 +988,14 @@ int xe_guc_pc_init(struct xe_guc_pc *pc)
 	struct xe_device *xe = gt_to_xe(gt);
 	struct xe_bo *bo;
 	u32 size = PAGE_ALIGN(sizeof(struct slpc_shared_data));
+	int err;
 
 	if (xe->info.skip_guc_pc)
 		return 0;
 
-	mutex_init(&pc->freq_lock);
+	err = drmm_mutex_init(&xe->drm, &pc->freq_lock);
+	if (err)
+		return err;
 
 	bo = xe_managed_bo_create_pin_map(xe, tile, size,
 					  XE_BO_CREATE_VRAM_IF_DGFX(tile) |
@@ -998,5 +1004,10 @@ int xe_guc_pc_init(struct xe_guc_pc *pc)
 		return PTR_ERR(bo);
 
 	pc->bo = bo;
+
+	err = drmm_add_action_or_reset(&xe->drm, xe_guc_pc_fini, pc);
+	if (err)
+		return err;
+
 	return 0;
 }

drivers/gpu/drm/xe/xe_guc_pc.h

@@ -9,7 +9,6 @@
 #include "xe_guc_pc_types.h"
 
 int xe_guc_pc_init(struct xe_guc_pc *pc);
-void xe_guc_pc_fini(struct xe_guc_pc *pc);
 int xe_guc_pc_start(struct xe_guc_pc *pc);
 int xe_guc_pc_stop(struct xe_guc_pc *pc);
 int xe_guc_pc_gucrc_disable(struct xe_guc_pc *pc);