[PATCH v2 3/3] drm/msm/dpu: switch dpu_encoder to use drm_debugfs_add_file()

[Dmitry Baryshkov]

Use drm_debugfs_add_file() for encoder's status file. This changes the
name of the status file from encoder%d/status to just encoder%d.

Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 40 ++++++---------------
 1 file changed, 11 insertions(+), 29 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c 
b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index af34932729db..0ac68f44ec74 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -14,6 +14,7 @@
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_crtc.h>
+#include <drm/drm_debugfs.h>
 #include <drm/drm_file.h>
 #include <drm/drm_probe_helper.h>
 
@@ -142,7 +143,6 @@ 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 +186,6 @@ 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);
@@ -2091,7 +2090,8 @@ void dpu_encoder_helper_phys_cleanup(struct 
dpu_encoder_phys *phys_enc)
 #ifdef CONFIG_DEBUG_FS
 static int _dpu_encoder_status_show(struct seq_file *s, void *data)
 {
-       struct dpu_encoder_virt *dpu_enc = s->private;
+       struct drm_debugfs_entry *entry = s->private;
+       struct dpu_encoder_virt *dpu_enc = entry->file.data;
        int i;
 
        mutex_lock(&dpu_enc->enc_lock);
@@ -2110,48 +2110,31 @@ static int _dpu_encoder_status_show(struct seq_file *s, 
void *data)
        return 0;
 }
 
-DEFINE_SHOW_ATTRIBUTE(_dpu_encoder_status);
-
-static int _dpu_encoder_init_debugfs(struct drm_encoder *drm_enc)
+static void _dpu_encoder_init_debugfs(struct drm_encoder *drm_enc)
 {
        struct dpu_encoder_virt *dpu_enc = to_dpu_encoder_virt(drm_enc);
-
-       char name[12];
+       char *name;
 
        if (!drm_enc->dev) {
                DPU_ERROR("invalid encoder or kms\n");
-               return -EINVAL;
+               return;
        }
 
-       snprintf(name, sizeof(name), "encoder%u", drm_enc->base.id);
+       name = devm_kasprintf(drm_enc->dev->dev, GFP_KERNEL, "encoder%u", 
drm_enc->base.id);
 
-       /* create overall sub-directory for the encoder */
-       dpu_enc->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);
-
-       return 0;
+       drm_debugfs_add_file(drm_enc->dev, name, _dpu_encoder_status_show, 
dpu_enc);
 }
 #else
-static int _dpu_encoder_init_debugfs(struct drm_encoder *drm_enc)
+static void _dpu_encoder_init_debugfs(struct drm_encoder *drm_enc)
 {
-       return 0;
 }
 #endif
 
 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);
+       _dpu_encoder_init_debugfs(encoder);
 
-       debugfs_remove_recursive(dpu_enc->debugfs_root);
+       return 0;
 }
 
 static int dpu_encoder_virt_add_phys_encs(
@@ -2380,7 +2363,6 @@ 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,
-- 
2.39.2