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drm/amd/display: Save/restore link setting for disable phy when link retraining 

[Why]
The link setting will be modify after disable phy
and due to DP Compliance Fails.

[How]
Save and resotre link setting for disable link phy when link retraining.

Signed-off-by: Hugo Hu <hugo.hu@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Hugo Hu 2019-11-13 16:18:09 -05:00 committed by Alex Deucher
parent 8d623f86c0
commit 99218d122a
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
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@ -2788,9 +2788,9 @@ bool dc_link_handle_hpd_rx_irq(struct dc_link *link, union hpd_irq_data *out_hpd
union hpd_irq_data hpd_irq_dpcd_data = { { { {0} } } };
union device_service_irq device_service_clear = { { 0 } };
enum dc_status result;
bool status = false;
struct pipe_ctx *pipe_ctx;
struct dc_link_settings previous_link_settings;
int i;
if (out_link_loss)
@ -2873,9 +2873,10 @@ bool dc_link_handle_hpd_rx_irq(struct dc_link *link, union hpd_irq_data *out_hpd
if (pipe_ctx == NULL || pipe_ctx->stream == NULL)
return false;
previous_link_settings = link->cur_link_settings;
dp_disable_link_phy(link, pipe_ctx->stream->signal);
perform_link_training_with_retries(&link->cur_link_settings,
perform_link_training_with_retries(&previous_link_settings,
true, LINK_TRAINING_ATTEMPTS,
pipe_ctx,
pipe_ctx->stream->signal);