This reverts commit 
0d93e821867c ("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>
 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);
 
 
                // 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);
                // 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");
        }
 }