Re: [PATCH 4/4] drm/i915/fbc: enable FBC on SKL too

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On Mon, Mar 21, 2016 at 04:26:58PM -0300, Paulo Zanoni wrote:
> Now that we're more protected against user space doing frontbuffer
> mmap rendering, the last - how many times did I say this before? -
> SKL problem seems to be solved. So let's give it a try.
> 
> If you reached this commit through git bisect or if you just want more
> information about FBC, please see:
>     commit a98ee79317b4091cafb502b4ffdbbbe1335e298c
>     Author: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
>     Date:   Tue Feb 16 18:47:21 2016 -0200
>         drm/i915/fbc: enable FBC by default on HSW and BDW
> 
> Signed-off-by: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
> ---
>  drivers/gpu/drm/i915/intel_fbc.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c
> index 718ac38..67f8810 100644
> --- a/drivers/gpu/drm/i915/intel_fbc.c
> +++ b/drivers/gpu/drm/i915/intel_fbc.c
> @@ -1270,7 +1270,8 @@ void intel_fbc_init(struct drm_i915_private *dev_priv)
>  	 * know what's going on. */
>  	if (i915.enable_fbc < 0) {
>  		i915.enable_fbc = IS_HASWELL(dev_priv) ||
> -				  IS_BROADWELL(dev_priv);
> +				  IS_BROADWELL(dev_priv) ||
> +				  IS_SKYLAKE(dev_priv);

Can we just future-proof this and enable on everything gen8+ where we have
fbc? Apparently bsw/bxt simply lack this ...
-Daniel

>  		DRM_DEBUG_KMS("Sanitized enable_fbc value: %d\n",
>  			      i915.enable_fbc);
>  	}
> -- 
> 2.7.0
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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