drm/amd/display: do not read link setting if edp not connected

[Why]
Previously assume eDP sink present if connector present. Do not
need to enforce this restriction. Fix issue where driver attempt
to read link setting even though no edp connected.

{How]
Only read link setting after reading connection status.

Signed-off-by: Eric Yang <Eric.Yang2@amd.com>
Reviewed-by: Yongqiang Sun <yongqiang.sun@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index 2dd585b..193d6f1 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -722,13 +722,6 @@ bool dc_link_detect(struct dc_link *link, enum dc_detect_reason reason)
                return false;
        }
 
-       if (link->connector_signal == SIGNAL_TYPE_EDP) {
-               /* On detect, we want to make sure current link settings are
-                * up to date, especially if link was powered on by GOP.
-                */
-               read_edp_current_link_settings_on_detect(link);
-       }
-
        prev_sink = link->local_sink;
        if (prev_sink != NULL) {
                dc_sink_retain(prev_sink);
@@ -770,6 +763,7 @@ bool dc_link_detect(struct dc_link *link, enum dc_detect_reason reason)
                }
 
                case SIGNAL_TYPE_EDP: {
+                       read_edp_current_link_settings_on_detect(link);
                        detect_edp_sink_caps(link);
                        sink_caps.transaction_type =
                                DDC_TRANSACTION_TYPE_I2C_OVER_AUX;