drm/amd/display: Change null plane state swizzle mode to 4kb_s

[Why]
During SetPathMode and UpdatePlanes, the plane state can be null. We default
to linear swizzle mode when plane state is null. This resulted in bandwidth
validation failing when trying to set 8K60 mode (which previously passed validation
during rebuild timing list).

[How]
Change the default swizzle mode from linear to 4kb_s and update pitch accordingly.

Signed-off-by: George Shen <[email protected]>
Reviewed-by: Dmytro Laktyushkin <[email protected]>
Acked-by: Aurabindo Pillai <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: George Shen

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c

@@ -2223,7 +2223,7 @@ int dcn20_populate_dml_pipes_from_context(
 		if (!res_ctx->pipe_ctx[i].plane_state) {
 			pipes[pipe_cnt].pipe.src.is_hsplit = pipes[pipe_cnt].pipe.dest.odm_combine != dm_odm_combine_mode_disabled;
 			pipes[pipe_cnt].pipe.src.source_scan = dm_horz;
-			pipes[pipe_cnt].pipe.src.sw_mode = dm_sw_linear;
+			pipes[pipe_cnt].pipe.src.sw_mode = dm_sw_4kb_s;
 			pipes[pipe_cnt].pipe.src.macro_tile_size = dm_64k_tile;
 			pipes[pipe_cnt].pipe.src.viewport_width = timing->h_addressable;
 			if (pipes[pipe_cnt].pipe.src.viewport_width > 1920)
@@ -2235,7 +2235,7 @@ int dcn20_populate_dml_pipes_from_context(
 			pipes[pipe_cnt].pipe.src.surface_width_y = pipes[pipe_cnt].pipe.src.viewport_width;
 			pipes[pipe_cnt].pipe.src.surface_height_c = pipes[pipe_cnt].pipe.src.viewport_height;
 			pipes[pipe_cnt].pipe.src.surface_width_c = pipes[pipe_cnt].pipe.src.viewport_width;
-			pipes[pipe_cnt].pipe.src.data_pitch = ((pipes[pipe_cnt].pipe.src.viewport_width + 63) / 64) * 64; /* linear sw only */
+			pipes[pipe_cnt].pipe.src.data_pitch = ((pipes[pipe_cnt].pipe.src.viewport_width + 255) / 256) * 256;
 			pipes[pipe_cnt].pipe.src.source_format = dm_444_32;
 			pipes[pipe_cnt].pipe.dest.recout_width = pipes[pipe_cnt].pipe.src.viewport_width; /*vp_width/hratio*/
 			pipes[pipe_cnt].pipe.dest.recout_height = pipes[pipe_cnt].pipe.src.viewport_height; /*vp_height/vratio*/