[Intel-gfx] [PATCH 2/2] drm/i915: Use RCS flips on Ivybridge+

[Lee, Chon Ming]

DERRMR is documented in vlv bspec. 

Regards,
Chon Ming

On Sep 4, 2013, at 5:42 PM, "Daniel Vetter" <daniel at ffwll.ch> wrote:

> On Wed, Sep 4, 2013 at 11:28 AM, Lee, Chon Ming <chon.ming.lee at intel.com> wrote:
>> This patch causes VLV hang, look like ring buffer lockup.
>> 
>> This is the message.
>> [drm] stuck on render ring
>> 
>> I haven't  look at the bspec for the different between VLV and Ivybridge on this
>> yet.  Just see anyone have any clue why this might fail in VLV.
> 
> I guess there's no DERRMR register on vlv? If that's the case I think
> we just need to disable rcs flips on vlv.
> -Daniel
> -- 
> Daniel Vetter
> Software Engineer, Intel Corporation
> +41 (0) 79 365 57 48 - http://blog.ffwll.ch