Re: [Freedreno] [PATCH v1 1/8] drm/msm/dpu: move disable_danger out of plane subdir

Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx> · Thu, 9 Dec 2021 13:09:45 -0800

On 12/1/2021 2:26 PM, Dmitry Baryshkov wrote:
The disable_danger debugfs file is not related to a single plane.
Instead it is used by all registered planes. Move it from plane subtree
to the global subtree next to danger_status and safe_status files,
so that the new file supplements them.

the danger_safe itself is a per-plane feature as each SSPP can be 
controlled individually.

In todays code, yes we do it for all the active planes together.
Since this is the same behavior

Reviewed-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
  drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c   | 70 +++++++++++++++++++++
  drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 74 +----------------------
  drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h |  6 ++
  3 files changed, 77 insertions(+), 73 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 6c457c419412..259d438bc6e8 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -101,6 +101,73 @@ static int dpu_debugfs_safe_stats_show(struct seq_file *s, void *v)
  }
  DEFINE_SHOW_ATTRIBUTE(dpu_debugfs_safe_stats);
  
+static ssize_t _dpu_plane_danger_read(struct file *file,
+			char __user *buff, size_t count, loff_t *ppos)
+{
+	struct dpu_kms *kms = file->private_data;
+	int len;
+	char buf[40];
+
+	len = scnprintf(buf, sizeof(buf), "%d\n", !kms->has_danger_ctrl);
+
+	return simple_read_from_buffer(buff, count, ppos, buf, len);
+}
+
+static void _dpu_plane_set_danger_state(struct dpu_kms *kms, bool enable)
+{
+	struct drm_plane *plane;
+
+	drm_for_each_plane(plane, kms->dev) {
+		if (plane->fb && plane->state) {
+			dpu_plane_danger_signal_ctrl(plane, enable);
+			DPU_DEBUG("plane:%d img:%dx%d ",
+				plane->base.id, plane->fb->width,
+				plane->fb->height);
+			DPU_DEBUG("src[%d,%d,%d,%d] dst[%d,%d,%d,%d]\n",
+				plane->state->src_x >> 16,
+				plane->state->src_y >> 16,
+				plane->state->src_w >> 16,
+				plane->state->src_h >> 16,
+				plane->state->crtc_x, plane->state->crtc_y,
+				plane->state->crtc_w, plane->state->crtc_h);
+		} else {
+			DPU_DEBUG("Inactive plane:%d\n", plane->base.id);
+		}
+	}
+}
+
+static ssize_t _dpu_plane_danger_write(struct file *file,
+		    const char __user *user_buf, size_t count, loff_t *ppos)
+{
+	struct dpu_kms *kms = file->private_data;
+	int disable_panic;
+	int ret;
+
+	ret = kstrtouint_from_user(user_buf, count, 0, &disable_panic);
+	if (ret)
+		return ret;
+
+	if (disable_panic) {
+		/* Disable panic signal for all active pipes */
+		DPU_DEBUG("Disabling danger:\n");
+		_dpu_plane_set_danger_state(kms, false);
+		kms->has_danger_ctrl = false;
+	} else {
+		/* Enable panic signal for all active pipes */
+		DPU_DEBUG("Enabling danger:\n");
+		kms->has_danger_ctrl = true;
+		_dpu_plane_set_danger_state(kms, true);
+	}
+
+	return count;
+}
+
+static const struct file_operations dpu_plane_danger_enable = {
+	.open = simple_open,
+	.read = _dpu_plane_danger_read,
+	.write = _dpu_plane_danger_write,
+};
+
  static void dpu_debugfs_danger_init(struct dpu_kms *dpu_kms,
  		struct dentry *parent)
  {
@@ -110,6 +177,9 @@ static void dpu_debugfs_danger_init(struct dpu_kms *dpu_kms,
  			dpu_kms, &dpu_debugfs_danger_stats_fops);
  	debugfs_create_file("safe_status", 0600, entry,
  			dpu_kms, &dpu_debugfs_safe_stats_fops);
+	debugfs_create_file("disable_danger", 0600, entry,
+			dpu_kms, &dpu_plane_danger_enable);
+
  }
  
  static int _dpu_debugfs_show_regset32(struct seq_file *s, void *data)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index ca190d92f0d5..6ea4db061c9f 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -1350,7 +1350,7 @@ static void dpu_plane_reset(struct drm_plane *plane)
  }
  
  #ifdef CONFIG_DEBUG_FS
-static void dpu_plane_danger_signal_ctrl(struct drm_plane *plane, bool enable)
+void dpu_plane_danger_signal_ctrl(struct drm_plane *plane, bool enable)
  {
  	struct dpu_plane *pdpu = to_dpu_plane(plane);
  	struct dpu_kms *dpu_kms = _dpu_plane_get_kms(plane);
@@ -1363,73 +1363,6 @@ static void dpu_plane_danger_signal_ctrl(struct drm_plane *plane, bool enable)
  	pm_runtime_put_sync(&dpu_kms->pdev->dev);
  }
  
-static ssize_t _dpu_plane_danger_read(struct file *file,
-			char __user *buff, size_t count, loff_t *ppos)
-{
-	struct dpu_kms *kms = file->private_data;
-	int len;
-	char buf[40];
-
-	len = scnprintf(buf, sizeof(buf), "%d\n", !kms->has_danger_ctrl);
-
-	return simple_read_from_buffer(buff, count, ppos, buf, len);
-}
-
-static void _dpu_plane_set_danger_state(struct dpu_kms *kms, bool enable)
-{
-	struct drm_plane *plane;
-
-	drm_for_each_plane(plane, kms->dev) {
-		if (plane->fb && plane->state) {
-			dpu_plane_danger_signal_ctrl(plane, enable);
-			DPU_DEBUG("plane:%d img:%dx%d ",
-				plane->base.id, plane->fb->width,
-				plane->fb->height);
-			DPU_DEBUG("src[%d,%d,%d,%d] dst[%d,%d,%d,%d]\n",
-				plane->state->src_x >> 16,
-				plane->state->src_y >> 16,
-				plane->state->src_w >> 16,
-				plane->state->src_h >> 16,
-				plane->state->crtc_x, plane->state->crtc_y,
-				plane->state->crtc_w, plane->state->crtc_h);
-		} else {
-			DPU_DEBUG("Inactive plane:%d\n", plane->base.id);
-		}
-	}
-}
-
-static ssize_t _dpu_plane_danger_write(struct file *file,
-		    const char __user *user_buf, size_t count, loff_t *ppos)
-{
-	struct dpu_kms *kms = file->private_data;
-	int disable_panic;
-	int ret;
-
-	ret = kstrtouint_from_user(user_buf, count, 0, &disable_panic);
-	if (ret)
-		return ret;
-
-	if (disable_panic) {
-		/* Disable panic signal for all active pipes */
-		DPU_DEBUG("Disabling danger:\n");
-		_dpu_plane_set_danger_state(kms, false);
-		kms->has_danger_ctrl = false;
-	} else {
-		/* Enable panic signal for all active pipes */
-		DPU_DEBUG("Enabling danger:\n");
-		kms->has_danger_ctrl = true;
-		_dpu_plane_set_danger_state(kms, true);
-	}
-
-	return count;
-}
-
-static const struct file_operations dpu_plane_danger_enable = {
-	.open = simple_open,
-	.read = _dpu_plane_danger_read,
-	.write = _dpu_plane_danger_write,
-};
-
  static int _dpu_plane_init_debugfs(struct drm_plane *plane)
  {
  	struct dpu_plane *pdpu = to_dpu_plane(plane);
@@ -1498,11 +1431,6 @@ static int _dpu_plane_init_debugfs(struct drm_plane *plane)
  			pdpu->debugfs_root,
  			(u32 *) &sblk->danger_vblank);
  
-	debugfs_create_file("disable_danger",
-			0600,
-			pdpu->debugfs_root,
-			kms, &dpu_plane_danger_enable);
-
  	return 0;
  }
  #else
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h
index 52792526e904..7667b1f81bd4 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.h
@@ -132,4 +132,10 @@ void dpu_plane_clear_multirect(const struct drm_plane_state *drm_state);
  int dpu_plane_color_fill(struct drm_plane *plane,
  		uint32_t color, uint32_t alpha);
  
+#ifdef CONFIG_DEBUG_FS
+void dpu_plane_danger_signal_ctrl(struct drm_plane *plane, bool enable);
+#else
+static inline void dpu_plane_danger_signal_ctrl(struct drm_plane *plane, bool enable) {}
+#endif
+
  #endif /* _DPU_PLANE_H_ */







