diff options
| author | Wenjing Liu <[email protected]> | 2017-09-14 18:50:32 -0400 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2017-10-21 16:41:43 -0400 |
| commit | 25bab0da8f61e7d8f717e4f9be34e97a1aaa0ccc (patch) | |
| tree | df316039eac077dea08850f763bbf31c1b61dc49 | |
| parent | d53d7866a795410f7b6a16b1ef0b37825edc794e (diff) | |
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: Wenjing Liu <[email protected]>
Reviewed-by: Tony Cheng <[email protected]>
Acked-by: Harry Wentland <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c index b735782b8fe0..ced42484dcfc 100644 --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c @@ -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; |