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| author | Wenjing Liu <Wenjing.Liu@amd.com> | 2017-08-23 17:02:34 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-09-26 18:17:08 -0400 |
| commit | 1cf49dea28dfc76f0816a4bc73c2ab975c72f55d (patch) | |
| tree | b10986b0a1c45c80194fdf703eb2a07cd058176d | |
| parent | 156590454259a19d1709fab2ff7d59870574e822 (diff) | |
| download | linux-stable-1cf49dea28dfc76f0816a4bc73c2ab975c72f55d.tar.gz linux-stable-1cf49dea28dfc76f0816a4bc73c2ab975c72f55d.tar.bz2 linux-stable-1cf49dea28dfc76f0816a4bc73c2ab975c72f55d.zip | |
drm/amd/display: do not reset lane count in EQ fallback
[Description]
According to DP1.4 specs we should not reset lane count back
when falling back in failing EQ training.
This causes PHY test pattern compliance to fail as infinite LT
when LT fails EQ to 4 RBR and fails CR in a loop.
Signed-off-by: Wenjing Liu <Wenjing.Liu@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 2 |
1 files changed, 0 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 e19447d526ea..446e2933474c 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 @@ -1302,8 +1302,6 @@ bool decide_fallback_link_setting( current_link_setting->lane_count); } else if (!reached_minimum_link_rate (current_link_setting->link_rate)) { - current_link_setting->lane_count = - initial_link_settings.lane_count; current_link_setting->link_rate = reduce_link_rate( current_link_setting->link_rate); |