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authorPeter Rosin <peda@axentia.se>2018-08-06 08:19:10 +0200
committerAndrzej Hajda <a.hajda@samsung.com>2018-09-13 11:28:12 +0200
commit169cc4c7a14e988985c8833ddec2f3e897de2c28 (patch)
tree924ed403ff547e1d148956aaa6bf4c75e0024f8a /drivers/gpu/drm/drm_bridge.c
parenteb1d23d71e3e3b8d3f1dcc018bae7c04f06d53bb (diff)
downloadlinux-169cc4c7a14e988985c8833ddec2f3e897de2c28.tar.bz2
drm: bridge: document bridge attach/detach imbalance
Since commit 4a878c03d562 ("drm: bridge: Detach bridge from encoder at encoder cleanup time"), it is generally no longer correct to detach bridges from encoders manually. Document that. Signed-off-by: Peter Rosin <peda@axentia.se> Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180806061910.29914-3-peda@axentia.se
Diffstat (limited to 'drivers/gpu/drm/drm_bridge.c')
-rw-r--r--drivers/gpu/drm/drm_bridge.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index 1638bfe9627c..ba7025041e46 100644
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -104,6 +104,10 @@ EXPORT_SYMBOL(drm_bridge_remove);
* If non-NULL the previous bridge must be already attached by a call to this
* function.
*
+ * Note that bridges attached to encoders are auto-detached during encoder
+ * cleanup in drm_encoder_cleanup(), so drm_bridge_attach() should generally
+ * *not* be balanced with a drm_bridge_detach() in driver code.
+ *
* RETURNS:
* Zero on success, error code on failure
*/