[Intel-xe] [PATCH v4 21/22] drm/xe/guc: Move GuC power control init to "post-hwconfig"

["Michał Winiarski" <michal.winiarski@intel.com>]

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>
---
v3 -> v4:
- Convert xe_guc_pc_fini to act as drm-managed release function

 drivers/gpu/drm/xe/xe_gt.c     |  3 ---
 drivers/gpu/drm/xe/xe_guc.c    | 14 ++++++++------
 drivers/gpu/drm/xe/xe_guc_pc.c | 17 ++++++++++++++---
 drivers/gpu/drm/xe/xe_guc_pc.h |  1 -
 4 files changed, 22 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_gt.c b/drivers/gpu/drm/xe/xe_gt.c
index 9eaab11cf29a6..964e76f931a28 100644
--- a/drivers/gpu/drm/xe/xe_gt.c
+++ b/drivers/gpu/drm/xe/xe_gt.c
@@ -348,9 +348,6 @@ 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;
diff --git a/drivers/gpu/drm/xe/xe_guc.c b/drivers/gpu/drm/xe/xe_guc.c
index 36457477616a6..6777269f6a9bb 100644
--- a/drivers/gpu/drm/xe/xe_guc.c
+++ b/drivers/gpu/drm/xe/xe_guc.c
@@ -234,7 +234,6 @@ 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);
 }
@@ -307,11 +306,7 @@ 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);
+	ret = drmm_add_action_or_reset(&xe->drm, guc_fini, guc);
 	if (ret)
 		goto out;
 
@@ -347,6 +342,10 @@ 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);
 }
 
@@ -557,6 +556,9 @@ 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;
diff --git a/drivers/gpu/drm/xe/xe_guc_pc.c b/drivers/gpu/drm/xe/xe_guc_pc.c
index f5009a7968afa..4dbc89e91bbd4 100644
--- a/drivers/gpu/drm/xe/xe_guc_pc.c
+++ b/drivers/gpu/drm/xe/xe_guc_pc.c
@@ -931,12 +931,15 @@ int xe_guc_pc_stop(struct xe_guc_pc *pc)
 	return ret;
 }
 
-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;
+
+	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));
 	sysfs_remove_files(pc_to_gt(pc)->sysfs, pc_attrs);
-	mutex_destroy(&pc->freq_lock);
+	xe_force_wake_put(gt_to_fw(pc_to_gt(pc)), XE_FORCEWAKE_ALL);
 }
 
 /**
@@ -952,7 +955,9 @@ int xe_guc_pc_init(struct xe_guc_pc *pc)
 	u32 size = PAGE_ALIGN(sizeof(struct slpc_shared_data));
 	int err;
 
-	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) |
@@ -966,5 +971,11 @@ int xe_guc_pc_init(struct xe_guc_pc *pc)
 	if (err)
 		return err;
 
+	err = drmm_add_action_or_reset(&xe->drm, xe_guc_pc_fini, pc);
+	if (err) {
+		sysfs_remove_files(gt->sysfs, pc_attrs);
+		return err;
+	}
+
 	return 0;
 }
diff --git a/drivers/gpu/drm/xe/xe_guc_pc.h b/drivers/gpu/drm/xe/xe_guc_pc.h
index 054788e006f32..4cd023d9e8bec 100644
--- a/drivers/gpu/drm/xe/xe_guc_pc.h
+++ b/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);
-- 
2.43.0