[RFC PATCH v2 03/13] drm/msm/dpu: encoder: simplify debugfs handling

[Dmitry Baryshkov]

As the debugfs is fully cleared on drm device removal, drop the
encoder-specific cleanup function, remove debugfs_root from dpu_encoder
struct and also remove phys_encoder late_register() ops which has been
unused since the driver being added.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c   | 22 +++----------------
 .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h  |  3 ---
 2 files changed, 3 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 97d8d777f178..28729c77364f 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -142,7 +142,6 @@ enum dpu_enc_rc_states {
  * @crtc_kickoff_cb:		Callback into CRTC that will flush & start
  *				all CTL paths
  * @crtc_kickoff_cb_data:	Opaque user data given to crtc_kickoff_cb
- * @debugfs_root:		Debug file system root file node
  * @enc_lock:			Lock around physical encoder
  *				create/destroy/enable/disable
  * @frame_busy_mask:		Bitmask tracking which phys_enc we are still
@@ -186,7 +185,6 @@ struct dpu_encoder_virt {
 	struct drm_crtc *crtc;
 	struct drm_connector *connector;
 
-	struct dentry *debugfs_root;
 	struct mutex enc_lock;
 	DECLARE_BITMAP(frame_busy_mask, MAX_PHYS_ENCODERS_PER_VIRTUAL);
 	void (*crtc_frame_event_cb)(void *, u32 event);
@@ -2134,7 +2132,7 @@ DEFINE_SHOW_ATTRIBUTE(_dpu_encoder_status);
 static int _dpu_encoder_init_debugfs(struct drm_encoder *drm_enc)
 {
 	struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(drm_enc);
-	int i;
+	struct dentry *debugfs_root;
 
 	char name[DPU_NAME_SIZE];
 
@@ -2146,18 +2144,12 @@ static int _dpu_encoder_init_debugfs(struct drm_encoder *drm_enc)
 	snprintf(name, DPU_NAME_SIZE, "encoder%u", drm_enc->base.id);
 
 	/* create overall sub-directory for the encoder */
-	dpu_enc->debugfs_root = debugfs_create_dir(name,
+	debugfs_root = debugfs_create_dir(name,
 			drm_enc->dev->primary->debugfs_root);
 
 	/* don't error check these */
 	debugfs_create_file("status", 0600,
-		dpu_enc->debugfs_root, dpu_enc, &_dpu_encoder_status_fops);
-
-	for (i = 0; i < dpu_enc->num_phys_encs; i++)
-		if (dpu_enc->phys_encs[i]->ops.late_register)
-			dpu_enc->phys_encs[i]->ops.late_register(
-					dpu_enc->phys_encs[i],
-					dpu_enc->debugfs_root);
+		debugfs_root, dpu_enc, &_dpu_encoder_status_fops);
 
 	return 0;
 }
@@ -2173,13 +2165,6 @@ static int dpu_encoder_late_register(struct drm_encoder *encoder)
 	return _dpu_encoder_init_debugfs(encoder);
 }
 
-static void dpu_encoder_early_unregister(struct drm_encoder *encoder)
-{
-	struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(encoder);
-
-	debugfs_remove_recursive(dpu_enc->debugfs_root);
-}
-
 static int dpu_encoder_virt_add_phys_encs(
 		struct msm_display_info *disp_info,
 		struct dpu_encoder_virt *dpu_enc,
@@ -2406,7 +2391,6 @@ static const struct drm_encoder_helper_funcs dpu_encoder_helper_funcs = {
 static const struct drm_encoder_funcs dpu_encoder_funcs = {
 		.destroy = dpu_encoder_destroy,
 		.late_register = dpu_encoder_late_register,
-		.early_unregister = dpu_encoder_early_unregister,
 };
 
 int dpu_encoder_setup(struct drm_device *dev, struct drm_encoder *enc,
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
index 1d434b22180d..9e29079a6fc4 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
@@ -63,7 +63,6 @@ struct dpu_encoder_phys;
 /**
  * struct dpu_encoder_phys_ops - Interface the physical encoders provide to
  *	the containing virtual encoder.
- * @late_register:		DRM Call. Add Userspace interfaces, debugfs.
  * @prepare_commit:		MSM Atomic Call, start of atomic commit sequence
  * @is_master:			Whether this phys_enc is the current master
  *				encoder. Can be switched at enable time. Based
@@ -93,8 +92,6 @@ struct dpu_encoder_phys;
  */
 
 struct dpu_encoder_phys_ops {
-	int (*late_register)(struct dpu_encoder_phys *encoder,
-			struct dentry *debugfs_root);
 	void (*prepare_commit)(struct dpu_encoder_phys *encoder);
 	bool (*is_master)(struct dpu_encoder_phys *encoder);
 	void (*atomic_mode_set)(struct dpu_encoder_phys *encoder,
-- 
2.30.2