drm/amd/display: Add swizzle visual confirm mode

[Why]
To support a new visual confirm mode: swizzle to show the specific
color at the screen border according to different surface swizzle mode.
Currently we only support the Linear mode with red color.

Signed-off-by: Po-Ting Chen <robin.chen@amd.com>
Acked-by: Stylon Wang <stylon.wang@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: Po-Ting Chen

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

@@ -403,3 +403,24 @@ void get_hdr_visual_confirm_color(
 		break;
 	}
 }
+
+void get_surface_tile_visual_confirm_color(
+		struct pipe_ctx *pipe_ctx,
+		struct tg_color *color)
+{
+	uint32_t color_value = MAX_TG_COLOR_VALUE;
+	/* Determine the overscan color based on the top-most (desktop) plane's context */
+	struct pipe_ctx *top_pipe_ctx  = pipe_ctx;
+
+	while (top_pipe_ctx->top_pipe != NULL)
+		top_pipe_ctx = top_pipe_ctx->top_pipe;
+
+	switch (top_pipe_ctx->plane_state->tiling_info.gfx9.swizzle) {
+	case DC_SW_LINEAR:
+		/* LINEAR Surface - set border color to red */
+		color->color_r_cr = color_value;
+		break;
+	default:
+		break;
+	}
+}

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

@@ -318,6 +318,7 @@ enum visual_confirm {
 	VISUAL_CONFIRM_HDR = 2,
 	VISUAL_CONFIRM_MPCTREE = 4,
 	VISUAL_CONFIRM_PSR = 5,
+	VISUAL_CONFIRM_SWIZZLE = 9,
 };
 
 enum dcc_option {

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c

@@ -2433,6 +2433,8 @@ void dcn10_update_visual_confirm_color(struct dc *dc, struct pipe_ctx *pipe_ctx,
 		get_hdr_visual_confirm_color(pipe_ctx, color);
 	else if (dc->debug.visual_confirm == VISUAL_CONFIRM_SURFACE)
 		get_surface_visual_confirm_color(pipe_ctx, color);
+	else if (dc->debug.visual_confirm == VISUAL_CONFIRM_SWIZZLE)
+		get_surface_tile_visual_confirm_color(pipe_ctx, color);
 	else
 		color_space_to_black_color(
 				dc, pipe_ctx->stream->output_color_space, color);

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c

@@ -2290,6 +2290,8 @@ void dcn20_update_visual_confirm_color(struct dc *dc, struct pipe_ctx *pipe_ctx,
 		get_surface_visual_confirm_color(pipe_ctx, color);
 	else if (dc->debug.visual_confirm == VISUAL_CONFIRM_MPCTREE)
 		get_mpctree_visual_confirm_color(pipe_ctx, color);
+	else if (dc->debug.visual_confirm == VISUAL_CONFIRM_SWIZZLE)
+		get_surface_tile_visual_confirm_color(pipe_ctx, color);
 
 	if (mpc->funcs->set_bg_color)
 		mpc->funcs->set_bg_color(mpc, color, mpcc_id);

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

@@ -268,5 +268,7 @@ void get_hdr_visual_confirm_color(
 void get_mpctree_visual_confirm_color(
 		struct pipe_ctx *pipe_ctx,
 		struct tg_color *color);
-
+void get_surface_tile_visual_confirm_color(
+		struct pipe_ctx *pipe_ctx,
+		struct tg_color *color);
 #endif /* __DC_HW_SEQUENCER_H__ */