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

[Ville Syrjälä]

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 at intel.com>
> Cc: Paulo Zanoni <paulo.r.zanoni at intel.com>
> Signed-off-by: Jani Nikula <jani.nikula at intel.com>

Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

> ---
>  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
> 
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Ville Syrjälä
Intel OTC