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drm/amd/display: set lttpr mode before link settings

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[Why]
Some lttpr devices do not work properly when lttpr mode is configured
after link settings.

[How]
Move lttpr configuration before lane settings.

Signed-off-by: abdoulaye berthe <abdoulaye.berthe@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
abdoulaye berthe 2020-02-18 17:05:05 -05:00 committed by Alex Deucher
parent ccb6af1e25
commit bcc5042a22
1 changed files with 4 additions and 2 deletions
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6
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
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@ -1446,6 +1446,10 @@ enum link_training_result dc_link_dp_perform_link_training(
&link->preferred_training_settings,
&lt_settings);
/* Configure lttpr mode */
if (!link->is_lttpr_mode_transparent)
configure_lttpr_mode(link);
if (link->ctx->dc->work_arounds.lt_early_cr_pattern)
start_clock_recovery_pattern_early(link, &lt_settings, DPRX);
@ -1460,8 +1464,6 @@ enum link_training_result dc_link_dp_perform_link_training(
dp_set_fec_ready(link, fec_enable);
if (!link->is_lttpr_mode_transparent) {
/* Configure lttpr mode */
configure_lttpr_mode(link);
/* 2. perform link training (set link training done
* to false is done as well)