[PATCH] drm/amd/display: Not to call dpcd_set_source_specific_data during resume.

[Rajib Mahapatra]

[Why]
During resume path, dpcd_set_source_specific_data is taking
extra time when core_link_write_dpcd fails on DP_SOURCE_OUI+0x03
and DP_SOURCE_MINIMUM_HBLANK_SUPPORTED. Here,aux->transfer fails
with multiple retries and consume sigficantamount time during
S0i3 resume.

[How]
Not to call dpcd_set_source_specific_data during resume path
when there is no oled panel connected and achieve faster resume
during S0i3.

Signed-off-by: Rajib Mahapatra <rajib.mahapatra at amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

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 c0bdc23702c8..04086c199dbb 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -892,7 +892,8 @@ static bool dc_link_detect_helper(struct dc_link *link,
 		(!link->dc->config.allow_edp_hotplug_detection)) &&
 		link->local_sink) {
 		// need to re-write OUI and brightness in resume case
-		if (link->connector_signal == SIGNAL_TYPE_EDP) {
+		if (link->connector_signal == SIGNAL_TYPE_EDP &&
+			(link->dpcd_sink_ext_caps.bits.oled == 1)) {
 			dpcd_set_source_specific_data(link);
 			msleep(post_oui_delay);
 			dc_link_set_default_brightness_aux(link);
-- 
2.25.1