drm/amd/display: Expose enc2_set_dynamic_metadata

[Why]
Need to implement register programming for HDR dynamic
metadata transmission and tests.
Signed-off-by: Ilya Bakoulin <Ilya.Bakoulin@amd.com>
Reviewed-by: Eric Bernstein <Eric.Bernstein@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_stream_encoder.c

@@ -373,7 +373,7 @@ static void enc2_read_state(struct stream_encoder *enc, struct enc_state *s)
  *
  *   Ensure the OTG master update lock is set when changing DME configuration.
  */
-static void enc2_set_dynamic_metadata(struct stream_encoder *enc,
+void enc2_set_dynamic_metadata(struct stream_encoder *enc,
 		bool enable_dme,
 		uint32_t hubp_requestor_id,
 		enum dynamic_metadata_mode dmdata_mode)

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_stream_encoder.h

@@ -104,4 +104,9 @@ void enc2_stream_encoder_dp_unblank(
 	struct stream_encoder *enc,
 	const struct encoder_unblank_param *param);
 
+void enc2_set_dynamic_metadata(struct stream_encoder *enc,
+		bool enable_dme,
+		uint32_t hubp_requestor_id,
+		enum dynamic_metadata_mode dmdata_mode);
+
 #endif /* __DC_STREAM_ENCODER_DCN20_H__ */