From: Nikhil Devshatwar <nikhil.nd@xxxxxx>
input_bus_flags are specified in drm_bridge_timings (legacy) as well
as drm_bridge_state->input_bus_cfg.flags
The flags from the timings will be deprecated. Bridges are supposed
to validate and set the bridge state flags from atomic_check.
Implement atomic_check hook for the same.
Signed-off-by: Nikhil Devshatwar <nikhil.nd@xxxxxx>
---
Notes:
changes from v4:
* fix a warning Reported-by: kernel test robot <lkp@xxxxxxxxx>
changes from v5:
* Moved the return statement here from patch 4 (where it was added
by mistake).
drivers/gpu/drm/bridge/ti-tfp410.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/drivers/gpu/drm/bridge/ti-tfp410.c b/drivers/gpu/drm/bridge/ti-tfp410.c
index 7dacc7e03eee..631ae8f11a77 100644
--- a/drivers/gpu/drm/bridge/ti-tfp410.c
+++ b/drivers/gpu/drm/bridge/ti-tfp410.c
@@ -228,6 +228,21 @@ static u32 *tfp410_get_input_bus_fmts(struct drm_bridge *bridge,
return input_fmts;
}
+static int tfp410_atomic_check(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct tfp410 *dvi = drm_bridge_to_tfp410(bridge);
+
+ /*
+ * There might be flags negotiation supported in future.
+ * Set the bus flags in atomic_check statically for now.
+ */
+ bridge_state->input_bus_cfg.flags = dvi->timings.input_bus_flags;
+ return 0;
+}
+
static const struct drm_bridge_funcs tfp410_bridge_funcs = {
.attach = tfp410_attach,
.detach = tfp410_detach,
@@ -238,6 +253,7 @@ static const struct drm_bridge_funcs tfp410_bridge_funcs = {
.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
.atomic_get_input_bus_fmts = tfp410_get_input_bus_fmts,
+ .atomic_check = tfp410_atomic_check,
};
static const struct drm_bridge_timings tfp410_default_timings = {
--
2.40.1
