From: Roman Li <roman...@amd.com>

 Power-down panel on disale only if sink exists
 otherwise it fails edid read during init sequence

Change-Id: Iefb7f16f7d465ad81ae83940237bc6a896429b29
Signed-off-by: Roman Li <roman...@amd.com>
Reviewed-by: Andrey Grodzovsky <andrey.grodzov...@amd.com>
Acked-by: Harry Wentland <harry.wentl...@amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

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 aac2420caefa..5bdcd5067116 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
@@ -114,7 +114,9 @@ void dp_disable_link_phy(struct dc_link *link, enum 
signal_type signal)
 
        if (signal == SIGNAL_TYPE_EDP) {
                link->link_enc->funcs->backlight_control(link->link_enc, false);
-               link->link_enc->funcs->power_control(link->link_enc, false);
+               if (link->dpcd_sink_count)
+                       link->link_enc->funcs->power_control(link->link_enc,
+                                                                       false);
        }
 
        link->link_enc->funcs->disable_output(link->link_enc, signal);
-- 
2.11.0

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