drm/amd/display: Add return code instead of boolean for future use

Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Reviewed-by: Mikita Lipski <Mikita.Lipski@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c

@@ -526,11 +526,11 @@ bool dm_helpers_submit_i2c(
 bool dm_helpers_dp_write_dsc_enable(
 		struct dc_context *ctx,
 		const struct dc_stream_state *stream,
-		bool enable
-)
+		bool enable)
 {
 	uint8_t enable_dsc = enable ? 1 : 0;
 	struct amdgpu_dm_connector *aconnector;
+	uint8_t ret;
 
 	if (!stream)
 		return false;
@@ -541,13 +541,13 @@ bool dm_helpers_dp_write_dsc_enable(
 		if (!aconnector->dsc_aux)
 			return false;
 
-		return (drm_dp_dpcd_write(aconnector->dsc_aux, DP_DSC_ENABLE, &enable_dsc, 1) >= 0);
+		ret = drm_dp_dpcd_write(aconnector->dsc_aux, DP_DSC_ENABLE, &enable_dsc, 1);
 	}
 
 	if (stream->signal == SIGNAL_TYPE_DISPLAY_PORT)
 		return dm_helpers_dp_write_dpcd(ctx, stream->link, DP_DSC_ENABLE, &enable_dsc, 1);
 
-	return false;
+	return (ret > 0);
 }
 
 bool dm_helpers_is_dp_sink_present(struct dc_link *link)