[Intel-gfx] [PATCH 1/2] drm/i915: Disallow interlaced modes on g4x DP outputs

[Jani Nikula]

On Thu, 14 Jun 2018, Jani Nikula <jani.nikula at linux.intel.com> wrote:
> On Wed, 13 Jun 2018, Ville Syrjala <ville.syrjala at linux.intel.com> wrote:
>> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>>
>> Looks like interlaced DP output doesn't work on g4x either. Not all
>> that surprising considering we already established that interlaced
>> DP output is busted on VLV/CHV.
>>
>> Cc: stable at vger.kernel.org
>> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> Reviewed-by: Jani Nikula <jani.nikula at intel.com>

Oh, did you have a bug reference?


>
>
>> ---
>>  drivers/gpu/drm/i915/intel_dp.c | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
>> index 40ffd9163175..6068986fd985 100644
>> --- a/drivers/gpu/drm/i915/intel_dp.c
>> +++ b/drivers/gpu/drm/i915/intel_dp.c
>> @@ -1869,7 +1869,7 @@ intel_dp_compute_config(struct intel_encoder *encoder,
>>  						conn_state->scaling_mode);
>>  	}
>>  
>> -	if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
>> +	if (HAS_GMCH_DISPLAY(dev_priv) &&
>>  	    adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
>>  		return false;
>>  
>> @@ -6351,7 +6351,7 @@ intel_dp_init_connector(struct intel_digital_port *intel_dig_port,
>>  	drm_connector_init(dev, connector, &intel_dp_connector_funcs, type);
>>  	drm_connector_helper_add(connector, &intel_dp_connector_helper_funcs);
>>  
>> -	if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv))
>> +	if (!HAS_GMCH_DISPLAY(dev_priv))
>>  		connector->interlace_allowed = true;
>>  	connector->doublescan_allowed = 0;

-- 
Jani Nikula, Intel Open Source Graphics Center