[PATCH V9 13/43] drm/colorop: Add destroy functions for color pipeline

[Alex Hung]

The functions are to clean up color pipeline when a device driver
fails to create its color pipeline.

Signed-off-by: Alex Hung <alex.hung at amd.com>
Reviewed-by: Daniel Stone <daniels at collabora.com>
---
v9:
 - Move from from latest commit to here, and drm_colorop_pipeline_destroy
   is called in respective commits.


 drivers/gpu/drm/drm_colorop.c | 36 +++++++++++++++++++++++++++++++++++
 include/drm/drm_colorop.h     |  2 ++
 2 files changed, 38 insertions(+)

diff --git a/drivers/gpu/drm/drm_colorop.c b/drivers/gpu/drm/drm_colorop.c
index 7b3ecf7ddd11..57a8c1063fdd 100644
--- a/drivers/gpu/drm/drm_colorop.c
+++ b/drivers/gpu/drm/drm_colorop.c
@@ -135,6 +135,42 @@ static int drm_plane_colorop_init(struct drm_device *dev, struct drm_colorop *co
 	return ret;
 }
 
+/**
+ * drm_colorop_cleanup - Cleanup a drm_colorop object in color_pipeline
+ *
+ * @colorop: The drm_colorop object to be cleaned
+ */
+static void drm_colorop_cleanup(struct drm_colorop *colorop)
+{
+	struct drm_device *dev = colorop->dev;
+	struct drm_mode_config *config = &dev->mode_config;
+
+	list_del(&colorop->head);
+	config->num_colorop--;
+
+	kfree(colorop->state);
+}
+
+/**
+ * drm_colorop_pipeline_destroy - Helper for color pipeline destruction
+ *
+ * @plane: - The drm_plane structure containing the color_pipeline
+ *
+ * Provides a default color pipeline destroy handler for a planes.
+ */
+void drm_colorop_pipeline_destroy(struct drm_plane *plane)
+{
+	struct drm_device *dev = plane->dev;
+	struct drm_mode_config *config = &dev->mode_config;
+	struct drm_colorop *colorop, *next;
+
+	list_for_each_entry_safe(colorop, next, &config->colorop_list, head) {
+		drm_colorop_cleanup(colorop);
+		kfree(colorop);
+	}
+}
+EXPORT_SYMBOL(drm_colorop_pipeline_destroy);
+
 /**
  * drm_plane_colorop_curve_1d_init - Initialize a DRM_COLOROP_1D_CURVE
  *
diff --git a/include/drm/drm_colorop.h b/include/drm/drm_colorop.h
index 791ab940c158..8e4d79ba1eff 100644
--- a/include/drm/drm_colorop.h
+++ b/include/drm/drm_colorop.h
@@ -239,6 +239,8 @@ static inline struct drm_colorop *drm_colorop_find(struct drm_device *dev,
 	return mo ? obj_to_colorop(mo) : NULL;
 }
 
+void drm_colorop_pipeline_destroy(struct drm_plane *plane);
+
 int drm_plane_colorop_curve_1d_init(struct drm_device *dev, struct drm_colorop *colorop,
 				    struct drm_plane *plane, u64 supported_tfs);
 
-- 
2.43.0