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

[Leo]

On 2022-06-23 12:48, Alex Deucher wrote:
> 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>

Reviewed-by: Leo Li <sunpeng.li 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
>>