[Intel-gfx] [PATCH] drm/i915/bxt: Fix eDP panel fitting

[Ville Syrjälä]

On Tue, Nov 03, 2015 at 06:29:41PM -0800, Matt Roper wrote:
> BXT CRTC scaling uses the same gen9 codepaths as SKL; these codepaths
> store panel fitter information in pipe_config->pch_pfit.  However since
> HAS_PCH_SPLIT() is false for BXT we never actually wind up filling in
> this structure (we wind up filling in pipe_config->gmch_pfit instead,
> which is ignored when we go to program the hardware).  Make sure we
> always take the PCH code path on gen9+ platforms.
> 
> Cc: Imre Deak <imre.deak at intel.com>
> Cc: Chandra Konduru <chandra.konduru at intel.com>
> Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
> ---
> Not a regression as far as I know; I believe this has been broken since BXT
> support was added to the driver.
> 
>  drivers/gpu/drm/i915/intel_dp.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 1cb1f3f..a8bbc2d 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -1426,7 +1426,7 @@ intel_dp_compute_config(struct intel_encoder *encoder,
>  				return ret;
>  		}
>  
> -		if (!HAS_PCH_SPLIT(dev))
> +		if (!HAS_PCH_SPLIT(dev) && INTEL_INFO(dev)->gen < 9)

HAS_GMCH_DISPLAY() would be neater.

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

>  			intel_gmch_panel_fitting(intel_crtc, pipe_config,
>  						 intel_connector->panel.fitting_mode);
>  		else
> -- 
> 2.1.4
> 
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-- 
Ville Syrjälä
Intel OTC