[PATCH 3/5] drm: bridge: Propagate the bus flags from bridge->timings

[Nikhil Devshatwar]

When the next bridge does not specify any bus flags, use the
bridge->timings->input_bus_flags as fallback when propagating
bus flags from next bridge to current bridge.

Signed-off-by: Nikhil Devshatwar <nikhil.nd at ti.com>
---
 drivers/gpu/drm/drm_bridge.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index 64f0effb52ac..8353723323ab 100644
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -975,6 +975,13 @@ drm_atomic_bridge_propagate_bus_flags(struct drm_bridge *bridge,
 	 * duplicate the "dummy propagation" logic.
 	 */
 	bridge_state->input_bus_cfg.flags = output_flags;
+
+	/*
+	 * Use the bridge->timings->input_bus_flags as fallback if the next bridge
+	 * does not specify the flags
+	 */
+	if (!bridge_state->input_bus_cfg.flags)
+		bridge_state->input_bus_cfg.flags = bridge->timings->input_bus_flags;
 }
 
 /**
-- 
2.17.1