From 099303e9a9bd77f66a1f7a8b3f447c572b532796 Mon Sep 17 00:00:00 2001 From: Peikang Zhang Date: Tue, 8 Sep 2020 11:27:25 -0400 Subject: drm/amd/display: eDP intermittent black screen during PnP [Why] We dont's turn off backlight before power off eDP (VDD), which is a violation of eDP specs. [How] Power off eDP backlight before power off eDP Signed-off-by: Peikang Zhang Reviewed-by: Anthony Koo Acked-by: Qingqing Zhuo Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/gpu/drm/amd/display/dc/core') diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c index 81c026319ccd..dba338c88256 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c @@ -229,6 +229,8 @@ void dp_disable_link_phy(struct dc_link *link, enum signal_type signal) dp_receiver_power_ctrl(link, false); if (signal == SIGNAL_TYPE_EDP) { + if (link->dc->hwss.edp_backlight_control) + link->dc->hwss.edp_backlight_control(link, false); link->link_enc->funcs->disable_output(link->link_enc, signal); link->dc->hwss.edp_power_control(link, false); } else { -- cgit v1.2.3