[PATCH 10/24] drm/amd/display: Avoid trying AUX transactions on disconnected ports

[Wayne Lin <Wayne.Lin@amd.com>]

[Why & How]
Observe that we try to access DPCD 0x600h of disconnected DP ports.
In order not to wasting time on retrying these ports, call
dpcd_write_rx_power_ctrl() after checking its connection status.

Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Wayne Lin <Wayne.Lin@amd.com>
---
 drivers/gpu/drm/amd/display/dc/link/link_dpms.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/link/link_dpms.c b/drivers/gpu/drm/amd/display/dc/link/link_dpms.c
index f1b8f8f7b3a4..aad2a4012896 100644
--- a/drivers/gpu/drm/amd/display/dc/link/link_dpms.c
+++ b/drivers/gpu/drm/amd/display/dc/link/link_dpms.c
@@ -140,7 +140,8 @@ void link_blank_dp_stream(struct dc_link *link, bool hw_init)
 				}
 		}
 
-		if ((!link->wa_flags.dp_keep_receiver_powered) || hw_init)
+		if (((!link->wa_flags.dp_keep_receiver_powered) || hw_init) &&
+			(link->type != dc_connection_none))
 			dpcd_write_rx_power_ctrl(link, false);
 	}
 }
-- 
2.43.0