This patch adds minimal output bus format negotiation support.
Currently we are adding support for only MEDIA_BUS_FMT_FIXED.
Signed-off-by: Yuti Amonkar <yamonkar@xxxxxxxxxxx>
---
.../drm/bridge/cadence/cdns-mhdp8546-core.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
index 6beccd2a408e..bdb0d95aa412 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c
@@ -2102,6 +2102,23 @@ static u32 *cdns_mhdp_get_input_bus_fmts(struct drm_bridge *bridge,
return input_fmts;
}
+static u32 *cdns_mhdp_get_output_bus_fmts(struct drm_bridge *bridge,
+ struct drm_bridge_state *bridge_state,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state,
+ unsigned int *num_output_fmts)
+{
+ u32 *output_fmts;
+
+ output_fmts = kzalloc(sizeof(*output_fmts), GFP_KERNEL);
+ if (!output_fmts)
+ return NULL;
+
+ *num_output_fmts = 1;
+ output_fmts[0] = MEDIA_BUS_FMT_FIXED;
+ return output_fmts;
+}
+
static int cdns_mhdp_atomic_check(struct drm_bridge *bridge,
struct drm_bridge_state *bridge_state,
struct drm_crtc_state *crtc_state,
@@ -2170,6 +2187,7 @@ static const struct drm_bridge_funcs cdns_mhdp_bridge_funcs = {
.atomic_destroy_state = cdns_mhdp_bridge_atomic_destroy_state,
.atomic_reset = cdns_mhdp_bridge_atomic_reset,
.atomic_get_input_bus_fmts = cdns_mhdp_get_input_bus_fmts,
+ .atomic_get_output_bus_fmts = cdns_mhdp_get_output_bus_fmts,
.detect = cdns_mhdp_bridge_detect,
.get_edid = cdns_mhdp_bridge_get_edid,
.hpd_enable = cdns_mhdp_bridge_hpd_enable,
--
2.17.1
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