drm/amd/display: Add visual confirm color support for SubVP

[Why && How]
We would like to have visual confirm color support for SubVP.
	1. Set visual confirm color to red: SubVP is enable on this
	display;
	2. Set visual confirm color to green: SubVP is enable on
	other display and DRR is on this display;
	3. Set visual confirm color to blue: SubVP is enable on
	other display and DRR is off on this display;
Reviewed-by: Alvin Lee <Alvin.Lee2@amd.com>
Acked-by: Brian Chang <Brian.Chang@amd.com>
Signed-off-by: Leo (Hanghong) Ma <hanghong.ma@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -402,6 +402,44 @@ void get_hdr_visual_confirm_color(
 	}
 }
 
+void get_subvp_visual_confirm_color(
+		struct dc *dc,
+		struct pipe_ctx *pipe_ctx,
+		struct tg_color *color)
+{
+	uint32_t color_value = MAX_TG_COLOR_VALUE;
+	bool enable_subvp = false;
+	int i;
+
+	if (!dc->ctx || !dc->ctx->dmub_srv || !pipe_ctx)
+		return;
+
+	for (i = 0; i < dc->res_pool->pipe_count; i++) {
+		struct pipe_ctx *pipe = &dc->current_state->res_ctx.pipe_ctx[i];
+
+	if (pipe->stream && pipe->stream->mall_stream_config.paired_stream &&
+				pipe->stream->mall_stream_config.type == SUBVP_MAIN) {
+			/* SubVP enable - red */
+			color->color_r_cr = color_value;
+			enable_subvp = true;
+
+			if (pipe_ctx->stream == pipe->stream)
+				return;
+			break;
+		}
+	}
+
+	if (enable_subvp && pipe_ctx->stream->mall_stream_config.type == SUBVP_NONE) {
+		color->color_r_cr = 0;
+		if (pipe_ctx->stream->ignore_msa_timing_param == 1)
+			/* SubVP enable and DRR on - green */
+			color->color_g_y = color_value;
+		else
+			/* SubVP enable and No DRR - blue */
+			color->color_b_cb = color_value;
+	}
+}
+
 void get_surface_tile_visual_confirm_color(
 		struct pipe_ctx *pipe_ctx,
 		struct tg_color *color)

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

@@ -417,6 +417,7 @@ enum visual_confirm {
 	VISUAL_CONFIRM_SWAPCHAIN = 6,
 	VISUAL_CONFIRM_FAMS = 7,
 	VISUAL_CONFIRM_SWIZZLE = 9,
+	VISUAL_CONFIRM_SUBVP = 14,
 };
 
 enum dc_psr_power_opts {

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

@@ -2465,6 +2465,8 @@ void dcn20_update_visual_confirm_color(struct dc *dc, struct pipe_ctx *pipe_ctx,
 		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);
+	else if (dc->debug.visual_confirm == VISUAL_CONFIRM_SUBVP)
+		get_subvp_visual_confirm_color(dc, pipe_ctx, color);
 
 	if (mpc->funcs->set_bg_color) {
 		memcpy(&pipe_ctx->plane_state->visual_confirm_color, color, sizeof(struct tg_color));

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

@@ -273,6 +273,11 @@ void get_surface_visual_confirm_color(
 		const struct pipe_ctx *pipe_ctx,
 		struct tg_color *color);
 
+void get_subvp_visual_confirm_color(
+	struct dc *dc,
+	struct pipe_ctx *pipe_ctx,
+	struct tg_color *color);
+
 void get_hdr_visual_confirm_color(
 		struct pipe_ctx *pipe_ctx,
 		struct tg_color *color);