[Intel-gfx] [PATCH 08/15] drm/i915: remove DSPPOS register

[Daniel Vetter]

On Thu, Mar 07, 2013 at 11:43:14AM +0200, Ville Syrjälä wrote:
> On Wed, Mar 06, 2013 at 08:03:15PM -0300, Paulo Zanoni wrote:
> > From: Paulo Zanoni <paulo.r.zanoni at intel.com>
> > 
> > I couldn't find any evidence that this register exists on Gen2+. On
> > Gen 2/3/4 documents this register is listed as reserved and read-only.
> > On the newer Gens this register is not even documented.
> 
> DSPPOS goes hand in hand with DSPSIZE. IIRC DSPA never had the
> windowing capability, but DSPB and DSPC on older gens had it.

Indeed Ville's right here, gen2/3 have this on sprite B/C (you could move
those things around back then to different pipes ...). So I think we want
a gen <= 3 check here (gen4+ lost this apparently with the fixed
pipe->plane mapping).
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch