[PATCH 11/17] drm/amd/display: Update link training no timeout behaviour on HDMI

[<Roman.Li@amd.com>]

From: Relja Vojvodic <Relja.Vojvodic@amd.com>

[Why & How]
- HMDI link training compliance testing fails when no timeout bit is
set
- Update condition to skip some link training logic when no timeout
is set

Reviewed-by: Chris Park <chris.park@amd.com>
Signed-off-by: Relja Vojvodic <Relja.Vojvodic@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
---
 .../amd/display/dc/link/protocols/link_hdmi_frl.c    | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_hdmi_frl.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_hdmi_frl.c
index 2f1b8c0bc8f8..5e0979ac3dcf 100644
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_hdmi_frl.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_hdmi_frl.c
@@ -561,6 +561,16 @@ static enum link_result hdmi_frl_perform_link_training(struct ddc_service *ddc_s
 				prev_flt_update = scdc_update.fields.FLT_UPDATE;
 			}
 
+			if (flt_no_timeout) {
+				offset = HDMI_SCDC_SOURCE_TEST_REQ;
+				link_query_ddc_data(ddc_service, slave_address, &offset,
+						sizeof(offset), &test_req.byte, sizeof(test_req.byte));
+				if (test_req.fields.FLT_NO_TIMEOUT == 0) {
+					FRL_INFO("FRL TEST REQ:  FLT_no_timeout = %d \n", test_req.fields.FLT_NO_TIMEOUT);
+					return LINK_RESULT_SUCCESS;
+				}
+			}
+
 			/*Set TxFFE = TxFFE0*/
 			/*Program FFE_Levels - scdc_config has this field at 0 */
 			if (override_FFE) {
@@ -583,7 +593,7 @@ static enum link_result hdmi_frl_perform_link_training(struct ddc_service *ddc_s
 				FRL_INFO("FRL LINK TRAINING:  TxFFE = %d.\n", current_FFE);
 				override_FFE = false;
 			}
-			if (scdc_update.fields.FLT_UPDATE || flt_no_timeout) {
+			if (scdc_update.fields.FLT_UPDATE) {
 				offset = HDMI_SCDC_LTP_REQ;
 				link_query_ddc_data(ddc_service, slave_address,
 								&offset, sizeof(offset), ltp_req.byte,
-- 
2.34.1