[PATCH RFC 11/15] drm: writeback: Add drm_writeback_connector cleanup

[Louis Chauvet]

Currently drm_writeback_connector are created by
drm_writeback_connector_init or drm_writeback_connector_init_with_encoder.
Both of the function uses drm_connector_init and drm_encoder_init, but
there is no way to properly clean those structure from outside.

This patch introduce the new function drm_writeback_connector_cleanup to
allow a proper cleanup.

Signed-off-by: Louis Chauvet <louis.chau...@bootlin.com>
---
 drivers/gpu/drm/drm_writeback.c | 10 ++++++++++
 include/drm/drm_writeback.h     | 11 +++++++++++
 2 files changed, 21 insertions(+)

diff --git a/drivers/gpu/drm/drm_writeback.c b/drivers/gpu/drm/drm_writeback.c
index a031c335bdb9..505a4eb40f93 100644
--- a/drivers/gpu/drm/drm_writeback.c
+++ b/drivers/gpu/drm/drm_writeback.c
@@ -184,6 +184,7 @@ int drm_writeback_connector_init(struct drm_device *dev,
        drm_encoder_helper_add(&wb_connector->encoder, enc_helper_funcs);
 
        wb_connector->encoder.possible_crtcs = possible_crtcs;
+       wb_connector->managed_encoder = true;
 
        ret = drm_encoder_init(dev, &wb_connector->encoder,
                               &drm_writeback_encoder_funcs,
@@ -290,6 +291,15 @@ int drm_writeback_connector_init_with_encoder(struct 
drm_device *dev,
 }
 EXPORT_SYMBOL(drm_writeback_connector_init_with_encoder);
 
+void drm_writeback_connector_cleanup(struct drm_writeback_connector 
*wb_connector)
+{
+       drm_connector_cleanup(&wb_connector->base);
+       drm_property_blob_put(wb_connector->pixel_formats_blob_ptr);
+       if (wb_connector->managed_encoder)
+               drm_encoder_cleanup(&wb_connector->encoder);
+}
+EXPORT_SYMBOL(drm_writeback_connector_cleanup);
+
 int drm_writeback_set_fb(struct drm_connector_state *conn_state,
                         struct drm_framebuffer *fb)
 {
diff --git a/include/drm/drm_writeback.h b/include/drm/drm_writeback.h
index 17e576c80169..e651c0c0c84c 100644
--- a/include/drm/drm_writeback.h
+++ b/include/drm/drm_writeback.h
@@ -35,6 +35,15 @@ struct drm_writeback_connector {
         */
        struct drm_encoder encoder;
 
+       /**
+        * @managed_encoder: Sets to true if @encoder was created by 
drm_writeback_connector_init()
+        *
+        * If the user used drm_writeback_connector_init_with_encoder() to 
create the connector,
+        * @encoder is not valid and not managed by drm_writeback_connector. 
This fields allows
+        * the drm_writeback_cleanup() function to properly destroy the encoder 
if needed.
+        */
+       bool managed_encoder;
+
        /**
         * @pixel_formats_blob_ptr:
         *
@@ -161,6 +170,8 @@ int drm_writeback_connector_init_with_encoder(struct 
drm_device *dev,
                                const struct drm_connector_funcs *con_funcs, 
const u32 *formats,
                                int n_formats);
 
+void drm_writeback_connector_cleanup(struct drm_writeback_connector 
*wb_connector);
+
 int drm_writeback_set_fb(struct drm_connector_state *conn_state,
                         struct drm_framebuffer *fb);
 

-- 
2.44.2