Revert "drm/amd/display: turn off eDP lcdvdd and backlight if not required"

This reverts commit 0d93e82 ("drm/amd/display: turn off eDP lcdvdd and backlight if not required")

Reason for revert: Causes S4 lightup regressions.

Reviewed-by: Gabe Teeger <gabe.teeger@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Ray Wu <ray.wu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: Nicholas Kazlauskas

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

@@ -6298,10 +6298,10 @@ void dc_query_current_properties(struct dc *dc, struct dc_current_properties *pr
 void dc_set_edp_power(const struct dc *dc, struct dc_link *edp_link,
 				 bool powerOn)
 {
-	if (!edp_link || !edp_link->dc || !edp_link->dc->link_srv)
+	if (edp_link->connector_signal != SIGNAL_TYPE_EDP)
 		return;
 
-	if (edp_link->connector_signal != SIGNAL_TYPE_EDP)
+	if (edp_link->skip_implict_edp_power_control == false)
 		return;
 
 	edp_link->dc->link_srv->edp_set_panel_power(edp_link, powerOn);

drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c

@@ -393,7 +393,6 @@ void edp_set_panel_power(struct dc_link *link, bool powerOn)
 
 		// 3. Rx power on
 		dpcd_write_rx_power_ctrl(link, true);
-		DC_LOG_BACKLIGHT("eDP power and backlight: Power on");
 	} else {
 		// 3. Rx power off
 		dpcd_write_rx_power_ctrl(link, false);
@@ -405,7 +404,6 @@ void edp_set_panel_power(struct dc_link *link, bool powerOn)
 		// 1. panel VDD off
 		if (!link->dc->config.edp_no_power_sequencing)
 			link->dc->hwss.edp_power_control(link, false);
-		DC_LOG_BACKLIGHT("eDP power and backlight: Power off");
 	}
 }