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

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[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>
This commit is contained in:
Eric Yang 2019-06-29 14:38:04 -04:00 committed by Alex Deucher
parent 7352193a33
commit b791f9dc2d
1 changed files with 1 additions and 7 deletions
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8
drivers/gpu/drm/amd/display/dc/core/dc_link.c
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@ -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;