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drm: bridge: document bridge attach/detach imbalance

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Since commit 4a878c03d5 ("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
This commit is contained in:
Peter Rosin 2018-08-06 08:19:10 +02:00 committed by Andrzej Hajda
parent eb1d23d71e
commit 169cc4c7a1
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/drm_bridge.c
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@ -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
*/