[Intel-gfx] [PATCH 3/5] drm/i915: Don't access fifodbg registers on gen8

[Chris Wilson]

On Fri, Feb 21, 2014 at 05:32:01PM +0200, mika.kuoppala at intel.com wrote:
> From: Mika Kuoppala <mika.kuoppala at intel.com>
> 
> as they don't exists.
> 
> Signed-off-by: Mika Kuoppala <mika.kuoppala at intel.com>
> Reviewed-by: Ben Widawsky <ben at bwidawsk.net>
> ---
>  drivers/gpu/drm/i915/intel_uncore.c |    9 +++++++--
>  1 file changed, 7 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
> index b2a6295..5ce8282 100644
> --- a/drivers/gpu/drm/i915/intel_uncore.c
> +++ b/drivers/gpu/drm/i915/intel_uncore.c
> @@ -143,7 +143,9 @@ static void __gen6_gt_force_wake_mt_put(struct drm_i915_private *dev_priv,
>  			   _MASKED_BIT_DISABLE(FORCEWAKE_KERNEL));
>  	/* something from same cacheline, but !FORCEWAKE_MT */
>  	__raw_posting_read(dev_priv, ECOBUS);
> -	gen6_gt_check_fifodbg(dev_priv);
> +
> +	if (IS_GEN6(dev_priv->dev) || IS_GEN7(dev_priv->dev))
> +		gen6_gt_check_fifodbg(dev_priv);

Don't let the function name fool you, this cannot be called on gen6.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre