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Commit 25bab0da authored by Wenjing Liu's avatar Wenjing Liu Committed by Alex Deucher
Browse files

drm/amd/display: set cp25201 to use TPS4 



[Description]
hbr2 compliance eye output is unstable
(toggling on and off) with debugger break.
This caueses intermittent PHY automation failure.
Need to look into the root cause later

Signed-off-by: default avatarWenjing Liu <Wenjing.Liu@amd.com>
Reviewed-by: default avatarTony Cheng <Tony.Cheng@amd.com>
Acked-by: default avatarHarry Wentland <Harry.Wentland@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent d53d7866

drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c

+14 −2
Original line number Diff line number Diff line
@@ -1700,6 +1700,12 @@ static void dp_test_send_link_training(struct dc_link *link) 
	dp_retrain_link_dp_test(link, &link_settings, false);

}



/* TODO hbr2 compliance eye output is unstable

 * (toggling on and off) with debugger break

 * This caueses intermittent PHY automation failure

 * Need to look into the root cause */

static uint8_t force_tps4_for_cp2520 = 1;



static void dp_test_send_phy_test_pattern(struct dc_link *link)

{

	union phy_test_pattern dpcd_test_pattern;
@@ -1758,10 +1764,16 @@ static void dp_test_send_phy_test_pattern(struct dc_link *link) 
		test_pattern = DP_TEST_PATTERN_80BIT_CUSTOM;

		break;

	case PHY_TEST_PATTERN_CP2520_1:

		test_pattern = DP_TEST_PATTERN_HBR2_COMPLIANCE_EYE;

		/* CP2520 pattern is unstable, temporarily use TPS4 instead */

		test_pattern = (force_tps4_for_cp2520 == 1) ?

				DP_TEST_PATTERN_TRAINING_PATTERN4 :

				DP_TEST_PATTERN_HBR2_COMPLIANCE_EYE;

		break;

	case PHY_TEST_PATTERN_CP2520_2:

		test_pattern = DP_TEST_PATTERN_CP2520_2;

		/* CP2520 pattern is unstable, temporarily use TPS4 instead */

		test_pattern = (force_tps4_for_cp2520 == 1) ?

				DP_TEST_PATTERN_TRAINING_PATTERN4 :

				DP_TEST_PATTERN_HBR2_COMPLIANCE_EYE;

		break;

	case PHY_TEST_PATTERN_CP2520_3:

		test_pattern = DP_TEST_PATTERN_TRAINING_PATTERN4;