Re: [PATCH] drm/i915/icl: do not save DDI A/E sharing bit for ICL

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On Tue, 06 Mar 2018, Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> wrote:
> On Tue, Mar 06, 2018 at 12:41:55PM +0200, Jani Nikula wrote:
>> We don't want to preserve the DDI A 4 lane bit on ICL.
>> 
>> Fixes: 3d2011cfa41f ("drm/i915/icl: remove port A/E lane sharing limitation.")
>> Cc: Mahesh Kumar <mahesh1.kumar@xxxxxxxxx>
>> Cc: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
>> Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
>
> Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>

Pushed, thanks for the review.

The one CI warning is unrelated.

BR,
Jani.

>
>> ---
>>  drivers/gpu/drm/i915/intel_ddi.c | 9 ++++++---
>>  1 file changed, 6 insertions(+), 3 deletions(-)
>> 
>> diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
>> index bfdaa5d86861..66417dd24bfc 100644
>> --- a/drivers/gpu/drm/i915/intel_ddi.c
>> +++ b/drivers/gpu/drm/i915/intel_ddi.c
>> @@ -2932,9 +2932,12 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port)
>>  	intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);
>>  	intel_encoder->cloneable = 0;
>>  
>> -	intel_dig_port->saved_port_bits = I915_READ(DDI_BUF_CTL(port)) &
>> -					  (DDI_BUF_PORT_REVERSAL |
>> -					   DDI_A_4_LANES);
>> +	if (INTEL_GEN(dev_priv) >= 11)
>> +		intel_dig_port->saved_port_bits = I915_READ(DDI_BUF_CTL(port)) &
>> +			DDI_BUF_PORT_REVERSAL;
>> +	else
>> +		intel_dig_port->saved_port_bits = I915_READ(DDI_BUF_CTL(port)) &
>> +			(DDI_BUF_PORT_REVERSAL | DDI_A_4_LANES);
>>  	intel_dig_port->dp.output_reg = INVALID_MMIO_REG;
>>  	intel_dig_port->max_lanes = intel_ddi_max_lanes(intel_dig_port);
>>  
>> -- 
>> 2.11.0
>> 
>> _______________________________________________
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>> Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
>> https://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Jani Nikula, Intel Open Source Technology Center
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