drm/bridge: panel: Propagate bus format/flags

Propagate bus format/flags so that the previous bridge element in the
chain knows which input format the panel bridge expects.

v11:
* Fix a typo in the subject
* Update the commit message so it's readable by itself

v10:
* Add changelog to the commit message

v8 -> v9:
* No changes

v7:
* Set atomic state hooks explicitly

v4 -> v6:
* Not part of the series

v3:
* Adjust things to match the new bus-format negotiation approach
* Use drm_atomic_helper_bridge_propagate_bus_fmt
* Don't implement ->atomic_check() (the core now takes care of bus
  flags propagation)

v2:
* Adjust things to match the new bus-format negotiation approach

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200128135514.108171-11-boris.brezillon@collabora.com

diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c
index fa764f9..9660736 100644 (file)
--- a/drivers/gpu/drm/bridge/panel.c
+++ b/drivers/gpu/drm/bridge/panel.c
@@ -127,6 +127,10 @@ static const struct drm_bridge_funcs panel_bridge_bridge_funcs = {
        .enable = panel_bridge_enable,
        .disable = panel_bridge_disable,
        .post_disable = panel_bridge_post_disable,
+       .atomic_reset = drm_atomic_helper_bridge_reset,
+       .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+       .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+       .atomic_get_input_bus_fmts = drm_atomic_helper_bridge_propagate_bus_fmt,
 };
 
 /**