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

[Why]
We want to get the visual confirm color of the bottom-most pipe
for test automation.

[How]
Save the visual confirm color to plane_state before program to MPC;
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@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/dc.h

@@ -1183,6 +1183,7 @@ struct dc_plane_state {
 	/* private to dc_surface.c */
 	enum dc_irq_source irq_source;
 	struct kref refcount;
+	struct tg_color visual_confirm_color;
 };
 
 struct dc_plane_info {

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

@@ -389,6 +389,37 @@ void dc_dmub_srv_query_caps_cmd(struct dmub_srv *dmub)
 	}
 }
 
+void dc_dmub_srv_get_visual_confirm_color_cmd(struct dc *dc, struct pipe_ctx *pipe_ctx)
+{
+	union dmub_rb_cmd cmd = { 0 };
+	enum dmub_status status;
+	unsigned int panel_inst = 0;
+
+	dc_get_edp_link_panel_inst(dc, pipe_ctx->stream->link, &panel_inst);
+
+	memset(&cmd, 0, sizeof(cmd));
+
+	// Prepare fw command
+	cmd.visual_confirm_color.header.type = DMUB_CMD__GET_VISUAL_CONFIRM_COLOR;
+	cmd.visual_confirm_color.header.sub_type = 0;
+	cmd.visual_confirm_color.header.ret_status = 1;
+	cmd.visual_confirm_color.header.payload_bytes = sizeof(struct dmub_cmd_visual_confirm_color_data);
+	cmd.visual_confirm_color.visual_confirm_color_data.visual_confirm_color.panel_inst = panel_inst;
+
+	// Send command to fw
+	status = dmub_srv_cmd_with_reply_data(dc->ctx->dmub_srv->dmub, &cmd);
+
+	ASSERT(status == DMUB_STATUS_OK);
+
+	// If command was processed, copy feature caps to dmub srv
+	if (status == DMUB_STATUS_OK &&
+		cmd.visual_confirm_color.header.ret_status == 0) {
+		memcpy(&dc->ctx->dmub_srv->dmub->visual_confirm_color,
+			&cmd.visual_confirm_color.visual_confirm_color_data,
+			sizeof(struct dmub_visual_confirm_color));
+	}
+}
+
 #ifdef CONFIG_DRM_AMD_DC_DCN
 /**
  * ***********************************************************************************************

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

@@ -78,6 +78,7 @@ void dc_dmub_srv_set_drr_manual_trigger_cmd(struct dc *dc, uint32_t tg_inst);
 bool dc_dmub_srv_p_state_delegate(struct dc *dc, bool enable_pstate, struct dc_state *context);
 
 void dc_dmub_srv_query_caps_cmd(struct dmub_srv *dmub);
+void dc_dmub_srv_get_visual_confirm_color_cmd(struct dc *dc, struct pipe_ctx *pipe_ctx);
 void dc_dmub_srv_clear_inbox0_ack(struct dc_dmub_srv *dmub_srv);
 void dc_dmub_srv_wait_for_inbox0_ack(struct dc_dmub_srv *dmub_srv);
 void dc_dmub_srv_send_inbox0_cmd(struct dc_dmub_srv *dmub_srv, union dmub_inbox0_data_register data);

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

@@ -2539,8 +2539,10 @@ void dcn10_update_visual_confirm_color(struct dc *dc, struct pipe_ctx *pipe_ctx,
 		color_space_to_black_color(
 				dc, pipe_ctx->stream->output_color_space, color);
 
-	if (mpc->funcs->set_bg_color)
+	if (mpc->funcs->set_bg_color) {
+		memcpy(&pipe_ctx->plane_state->visual_confirm_color, color, sizeof(struct tg_color));
 		mpc->funcs->set_bg_color(mpc, color, mpcc_id);
+	}
 }
 
 void dcn10_update_mpcc(struct dc *dc, struct pipe_ctx *pipe_ctx)

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

@@ -2466,8 +2466,10 @@ void dcn20_update_visual_confirm_color(struct dc *dc, struct pipe_ctx *pipe_ctx,
 	else if (dc->debug.visual_confirm == VISUAL_CONFIRM_SWIZZLE)
 		get_surface_tile_visual_confirm_color(pipe_ctx, color);
 
-	if (mpc->funcs->set_bg_color)
+	if (mpc->funcs->set_bg_color) {
+		memcpy(&pipe_ctx->plane_state->visual_confirm_color, color, sizeof(struct tg_color));
 		mpc->funcs->set_bg_color(mpc, color, mpcc_id);
+	}
 }
 
 void dcn20_update_mpcc(struct dc *dc, struct pipe_ctx *pipe_ctx)

drivers/gpu/drm/amd/display/dmub/dmub_srv.h

@@ -441,6 +441,7 @@ struct dmub_srv {
 
 	/* Feature capabilities reported by fw */
 	struct dmub_feature_caps feature_caps;
+	struct dmub_visual_confirm_color visual_confirm_color;
 };
 
 /**

drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h

@@ -246,6 +246,16 @@ struct dmub_feature_caps {
 	uint8_t reserved[6];
 };
 
+struct dmub_visual_confirm_color {
+	/**
+	 * Maximum 10 bits color value
+	 */
+	uint16_t color_r_cr;
+	uint16_t color_g_y;
+	uint16_t color_b_cb;
+	uint16_t panel_inst;
+};
+
 #if defined(__cplusplus)
 }
 #endif
@@ -644,6 +654,10 @@ enum dmub_cmd_type {
 	 * Command type used to query FW feature caps.
 	 */
 	DMUB_CMD__QUERY_FEATURE_CAPS = 6,
+	/**
+	 * Command type used to get visual confirm color.
+	 */
+	DMUB_CMD__GET_VISUAL_CONFIRM_COLOR = 8,
 	/**
 	 * Command type used for all PSR commands.
 	 */
@@ -2778,6 +2792,31 @@ struct dmub_rb_cmd_query_feature_caps {
 	struct dmub_cmd_query_feature_caps_data query_feature_caps_data;
 };
 
+/**
+ * Data passed from driver to FW in a DMUB_CMD__GET_VISUAL_CONFIRM_COLOR command.
+ */
+struct dmub_cmd_visual_confirm_color_data {
+	/**
+	 * DMUB feature capabilities.
+	 * After DMUB init, driver will query FW capabilities prior to enabling certain features.
+	 */
+struct dmub_visual_confirm_color visual_confirm_color;
+};
+
+/**
+ * Definition of a DMUB_CMD__GET_VISUAL_CONFIRM_COLOR command.
+ */
+struct dmub_rb_cmd_get_visual_confirm_color {
+ /**
+	 * Command header.
+	 */
+	struct dmub_cmd_header header;
+	/**
+	 * Data passed from driver to FW in a DMUB_CMD__GET_VISUAL_CONFIRM_COLOR command.
+	 */
+	struct dmub_cmd_visual_confirm_color_data visual_confirm_color_data;
+};
+
 struct dmub_optc_state {
 	uint32_t v_total_max;
 	uint32_t v_total_min;
@@ -3150,6 +3189,11 @@ union dmub_rb_cmd {
 	 * Definition of a DMUB_CMD__QUERY_FEATURE_CAPS command.
 	 */
 	struct dmub_rb_cmd_query_feature_caps query_feature_caps;
+
+	/**
+	 * Definition of a DMUB_CMD__GET_VISUAL_CONFIRM_COLOR command.
+	 */
+	struct dmub_rb_cmd_get_visual_confirm_color visual_confirm_color;
 	struct dmub_rb_cmd_drr_update drr_update;
 	struct dmub_rb_cmd_fw_assisted_mclk_switch fw_assisted_mclk_switch;