Re: [PATCH 05/17] drm/i915/icl: Don't allocate fixed bypass path blocks for ICL

[James Ausmus <james.ausmus@intel.com>]

On Tue, Jan 23, 2018 at 05:05:24PM -0200, Paulo Zanoni wrote:
> From: Mahesh Kumar <mahesh1.kumar@intel.com>
> 
> GEN9 onwards bypass path allocation of 4 blocks was needed, as per
> hardware design. ICL doesn't require bypass path allocation of 4 DDB
> blocks, handling the same in this patch.
> 
> v2 (from Paulo):
>   - No need for a comment that says what the code already says.
> 
> Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
> Signed-off-by: Mahesh Kumar <mahesh1.kumar@intel.com>
> Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>

Reviewed-by: James Ausmus <james.ausmus@intel.com>

> ---
>  drivers/gpu/drm/i915/intel_pm.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 0b92ea1dbd40..11aac65d1543 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -3778,7 +3778,8 @@ skl_ddb_get_pipe_allocation_limits(struct drm_device *dev,
>  	ddb_size = INTEL_INFO(dev_priv)->ddb_size;
>  	WARN_ON(ddb_size == 0);
>  
> -	ddb_size -= 4; /* 4 blocks for bypass path allocation */
> +	if (INTEL_GEN(dev_priv) < 11)
> +		ddb_size -= 4; /* 4 blocks for bypass path allocation */
>  
>  	/*
>  	 * If the state doesn't change the active CRTC's, then there's
> -- 
> 2.14.3
> 
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