Re: [PATCH] Revert "drm/i915: Ignore panel type from OpRegion on SKL"

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On Wed, 08 Mar 2017, ville.syrjala@xxxxxxxxxxxxxxx wrote:
> From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
>
> This reverts commit bb10d4ec3be4b069bfb61c60ca4f708f58f440f1.
>
> Since commit c8ebfad7a063 ("drm/i915: Ignore OpRegion panel type except
> on select machines") we ignore the OpRegion panel type except for
> specific machines (handled via a DMI match), so having SKL explicitly
> excluded from using the OpRegion panel type is redundant. So let's
> remove the SKL check.
>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
> Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
> Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>

Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>

> ---
>  drivers/gpu/drm/i915/intel_opregion.c | 11 -----------
>  1 file changed, 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c
> index 4a862a358c70..2e870da8927a 100644
> --- a/drivers/gpu/drm/i915/intel_opregion.c
> +++ b/drivers/gpu/drm/i915/intel_opregion.c
> @@ -1061,16 +1061,5 @@ intel_opregion_get_panel_type(struct drm_i915_private *dev_priv)
>  		return -ENODEV;
>  	}
>  
> -	/*
> -	 * FIXME On Dell XPS 13 9350 the OpRegion panel type (0) gives us
> -	 * low vswing for eDP, whereas the VBT panel type (2) gives us normal
> -	 * vswing instead. Low vswing results in some display flickers, so
> -	 * let's simply ignore the OpRegion panel type on SKL for now.
> -	 */
> -	if (IS_SKYLAKE(dev_priv)) {
> -		DRM_DEBUG_KMS("Ignoring OpRegion panel type (%d)\n", ret - 1);
> -		return -ENODEV;
> -	}
> -
>  	return ret - 1;
>  }

-- 
Jani Nikula, Intel Open Source Technology Center
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