drm/amd/display: allow windowed mpo + odm

This change adds a config flag to allow non fullscreen MPO during ODM.
Scaling calculation will still fail configurations where video is only
one one side of the screen.
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Acked-by: Agustin Gutierrez <agustin.gutierrez@amd.com>
Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1155,9 +1155,17 @@ bool resource_build_scaling_params(struct pipe_ctx *pipe_ctx)
 			pipe_ctx->plane_res.scl_data.recout.x += pipe_ctx->plane_res.scl_data.recout.width;
 	}
 
+	if (!pipe_ctx->stream->ctx->dc->config.enable_windowed_mpo_odm) {
 		if (pipe_ctx->plane_res.scl_data.viewport.height < MIN_VIEWPORT_SIZE ||
 				pipe_ctx->plane_res.scl_data.viewport.width < MIN_VIEWPORT_SIZE)
 			res = false;
+	} else {
+		/* Clamp minimum viewport size */
+		if (pipe_ctx->plane_res.scl_data.viewport.height < MIN_VIEWPORT_SIZE)
+			pipe_ctx->plane_res.scl_data.viewport.height = MIN_VIEWPORT_SIZE;
+		if (pipe_ctx->plane_res.scl_data.viewport.width < MIN_VIEWPORT_SIZE)
+			pipe_ctx->plane_res.scl_data.viewport.width = MIN_VIEWPORT_SIZE;
+	}
 
 	DC_LOG_SCALER("%s pipe %d:\nViewport: height:%d width:%d x:%d y:%d  Recout: height:%d width:%d x:%d y:%d  HACTIVE:%d VACTIVE:%d\n"
 			"src_rect: height:%d width:%d x:%d y:%d  dst_rect: height:%d width:%d x:%d y:%d  clip_rect: height:%d width:%d x:%d y:%d\n",

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

@@ -323,6 +323,7 @@ struct dc_config {
 	bool multi_mon_pp_mclk_switch;
 	bool disable_dmcu;
 	bool enable_4to1MPC;
+	bool enable_windowed_mpo_odm;
 	bool allow_edp_hotplug_detection;
 #if defined(CONFIG_DRM_AMD_DC_DCN)
 	bool clamp_min_dcfclk;

drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c

@@ -1929,6 +1929,7 @@ noinline bool dcn30_internal_validate_bw(
 	if (vlevel == context->bw_ctx.dml.soc.num_states)
 		goto validate_fail;
 
+	if (!dc->config.enable_windowed_mpo_odm) {
 		for (i = 0, pipe_idx = 0; i < dc->res_pool->pipe_count; i++) {
 			struct pipe_ctx *pipe = &context->res_ctx.pipe_ctx[i];
 			struct pipe_ctx *mpo_pipe = pipe->bottom_pipe;
@@ -1947,6 +1948,7 @@ noinline bool dcn30_internal_validate_bw(
 			}
 			pipe_idx++;
 		}
+	}
 
 	/* merge pipes if necessary */
 	for (i = 0; i < dc->res_pool->pipe_count; i++) {