No special reason.  It shouldn't matter on BYT either, really, since
pipe A doesn't have special characteristics like it does on HSW.

Jesse

On Thu, 6 Mar 2014 17:19:22 +0800
"Lin, Mengdong" <mengdong....@intel.com> wrote:

> Hi Jesse,
> 
>  
> 
> Could you tell us why Baytrail Gfx driver does not always use pipe A when 
> it's free?
> 
>  
> 
> We have a Baytrail-M which only have HDMI (port B) and DisplayPort (port C) 
> output.
> 
> When I connect HDMI or DP only, the Gfx driver always uses pipe B for port 
> B/C, although pipe A is free. This behavior does not change no matter I 
> enable X or not.
> 
> Is there any special consideration?
> 
>  
> 
> This is different from what we observe on HSW/BDW, where pipe A is always 
> used if it’s free.
> 
>  
> 
> Thanks
> 
> Mengdong
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