[PATCH] drm/i915/display: Fixed HDMI can't show up behind a USB-C dock station

[Jani Nikula]

On Mon, 22 Apr 2024, Jani Nikula <jani.nikula at linux.intel.com> wrote:
> On Mon, 22 Apr 2024, gareth.yu at intel.com wrote:
>> From: Gareth Yu <gareth.yu at intel.com>
>>
>> Re-train the main link once HPD happens without link status
>
> Please address review before sending more versions.

And, in the general case, do not send three versions of a patch in the
span of a few hours. Give review some time.

>
> Please include a patch changelog, and indicate patch version with git
> send-email/format-patch -vN option because otherwise we have no clue.
>
> BR,
> Jani.
>
>>
>> Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/10902
>> Cc : Tejas Upadhyay <tejaskumarx.surendrakumar.upadhyay at intel.com>
>> Cc : Matt Roper <matthew.d.roper at intel.com>
>> Cc : Ville Syrjälä <ville.syrjala at linux.intel.com>
>> Signed-off-by: Gareth Yu <gareth.yu at intel.com>
>> ---
>>  drivers/gpu/drm/i915/display/intel_dp.c | 7 ++++++-
>>  1 file changed, 6 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
>> index e05e25cd4a94..52ab549e6d08 100644
>> --- a/drivers/gpu/drm/i915/display/intel_dp.c
>> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
>> @@ -5849,8 +5849,13 @@ intel_dp_detect(struct drm_connector *connector,
>>  	/* Can't disconnect eDP */
>>  	if (intel_dp_is_edp(intel_dp))
>>  		status = edp_detect(intel_dp);
>> -	else if (intel_digital_port_connected(encoder))
>> +	else if (intel_digital_port_connected(encoder)) {
>>  		status = intel_dp_detect_dpcd(intel_dp);
>> +		if (status == connector_status_connected && intel_dp->is_mst &&
>> +		    !intel_dp_mst_link_status(intel_dp))
>> +			if (intel_dp_retrain_link(encoder, ctx))
>> +				status = connector_status_disconnected;
>> +	}
>>  	else
>>  		status = connector_status_disconnected;

-- 
Jani Nikula, Intel