drm/amd/display: Fixed extend to second screen mode hang

	1. Fixed acquire free split pipe bug.
	2. Change return value for dc_add_stream_to_ctx
	   from bool to enum.
	4. Remove redundant apply_ctx_for_surface calling
	5. Unlock pipe after back end programming.

Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -4495,10 +4495,10 @@ static int dm_update_crtcs_state(struct dc *dc,
 				DRM_DEBUG_DRIVER("Enabling DRM crtc: %d\n",
 							crtc->base.id);
 
-				if (!dc_add_stream_to_ctx(
+				if (dc_add_stream_to_ctx(
 						dc,
 						dm_state->context,
-						dm_new_crtc_state->stream)) {
+						dm_new_crtc_state->stream) != DC_OK) {
 					ret = -EINVAL;
 					goto fail;
 				}

drivers/gpu/drm/amd/display/dc/core/dc.c

@@ -766,34 +766,27 @@ static bool dc_commit_state_no_check(struct dc *dc, struct dc_state *context)
 	for (i = 0; i < context->stream_count; i++) {
 		const struct dc_sink *sink = context->streams[i]->sink;
 
-		for (j = 0; j < context->stream_status[i].plane_count; j++) {
-			dc->hwss.apply_ctx_for_surface(
-					dc, context->streams[i],
-					context->stream_status[i].plane_count,
-					context);
+		dc->hwss.apply_ctx_for_surface(
+				dc, context->streams[i],
+				context->stream_status[i].plane_count,
+				context);
 
-			/*
-			 * enable stereo
-			 * TODO rework dc_enable_stereo call to work with validation sets?
-			 */
-			for (k = 0; k < MAX_PIPES; k++) {
-				pipe = &context->res_ctx.pipe_ctx[k];
-
-				for (l = 0 ; pipe && l < context->stream_count; l++)  {
-					if (context->streams[l] &&
-					    context->streams[l] == pipe->stream &&
-					    dc->hwss.setup_stereo)
-						dc->hwss.setup_stereo(pipe, dc);
-				}
+		/*
+		 * enable stereo
+		 * TODO rework dc_enable_stereo call to work with validation sets?
+		 */
+		for (k = 0; k < MAX_PIPES; k++) {
+			pipe = &context->res_ctx.pipe_ctx[k];
+
+			for (l = 0 ; pipe && l < context->stream_count; l++)  {
+				if (context->streams[l] &&
+					context->streams[l] == pipe->stream &&
+					dc->hwss.setup_stereo)
+					dc->hwss.setup_stereo(pipe, dc);
 			}
 		}
 
-		for (j = 0; j < MAX_PIPES; j++) {
-			pipe = &context->res_ctx.pipe_ctx[j];
 
-			if (!pipe->top_pipe && pipe->stream == context->streams[i])
-				dc->hwss.pipe_control_lock(dc, pipe, false);
-		}
 
 		CONN_MSG_MODE(sink->link, "{%dx%d, %dx%d@%dKhz}",
 				context->streams[i]->timing.h_addressable,
@@ -815,6 +808,15 @@ static bool dc_commit_state_no_check(struct dc *dc, struct dc_state *context)
 
 	dc_enable_stereo(dc, context, dc_streams, context->stream_count);
 
+	for (i = 0; i < context->stream_count; i++) {
+		for (j = 0; j < MAX_PIPES; j++) {
+			pipe = &context->res_ctx.pipe_ctx[j];
+
+			if (!pipe->top_pipe && pipe->stream == context->streams[i])
+				dc->hwss.pipe_control_lock(dc, pipe, false);
+		}
+	}
+
 	dc_release_state(dc->current_state);
 
 	dc->current_state = context;

drivers/gpu/drm/amd/display/dc/core/dc_resource.c

@@ -1446,7 +1446,7 @@ bool resource_is_stream_unchanged(
 	return false;
 }
 
-bool dc_add_stream_to_ctx(
+enum dc_status dc_add_stream_to_ctx(
 		struct dc *dc,
 		struct dc_state *new_ctx,
 		struct dc_stream_state *stream)
@@ -1467,7 +1467,7 @@ bool dc_add_stream_to_ctx(
 	if (res != DC_OK)
 		DC_ERROR("Adding stream %p to context failed with err %d!\n", stream, res);
 
-	return res == DC_OK;
+	return res;
 }
 
 bool dc_remove_stream_from_ctx(
@@ -1640,10 +1640,9 @@ enum dc_status resource_map_pool_resources(
 	/* acquire new resources */
 	pipe_idx = acquire_first_free_pipe(&context->res_ctx, pool, stream);
 
-#if defined(CONFIG_DRM_AMD_DC_DCN1_0)
 	if (pipe_idx < 0)
-		acquire_first_split_pipe(&context->res_ctx, pool, stream);
-#endif
+		pipe_idx = acquire_first_split_pipe(&context->res_ctx, pool, stream);
+
 	if (pipe_idx < 0)
 		return DC_NO_CONTROLLER_RESOURCE;
 

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

@@ -631,7 +631,7 @@ bool dc_stream_get_scanoutpos(const struct dc_stream_state *stream,
 				  uint32_t *h_position,
 				  uint32_t *v_position);
 
-bool dc_add_stream_to_ctx(
+enum dc_status dc_add_stream_to_ctx(
 			struct dc *dc,
 		struct dc_state *new_ctx,
 		struct dc_stream_state *stream);