[PATCH] drm/amd/display : Log DP link training failure reason

[Alex Deucher]

On Thu, Jun 23, 2022 at 3:33 AM Chandan Vurdigere Nataraj
<chandan.vurdigerenataraj at amd.com> wrote:
>
> [Why]
> Existing logs doesn't print DP LT failure reason
>
> [How]
> Update the existing log with DP LT failure reason
>
> Signed-off-by: Chandan Vurdigere Nataraj <chandan.vurdigerenataraj at amd.com>

Acked-by: Alex Deucher <alexander.deucher at amd.com>

>
> 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 4027f439a5a4..c8355acd3672 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
> @@ -2786,9 +2786,9 @@ bool perform_link_training_with_retries(
>                                 break;
>                 }
>
> -               DC_LOG_WARNING("%s: Link(%d) training attempt %u of %d failed @ rate(%d) x lane(%d)\n",
> +               DC_LOG_WARNING("%s: Link(%d) training attempt %u of %d failed @ rate(%d) x lane(%d) : fail reason:(%d)\n",
>                         __func__, link->link_index, (unsigned int)j + 1, attempts, cur_link_settings.link_rate,
> -                       cur_link_settings.lane_count);
> +                       cur_link_settings.lane_count, status);
>
>                 dp_disable_link_phy(link, &pipe_ctx->link_res, signal);
>
> --
> 2.25.1
>