[Intel-gfx] [PATCH v3 4/4] drm/i915: Support variable cursor height on ivb+

[Ville Syrjälä]

On Sat, Sep 13, 2014 at 05:23:23PM +0100, Chris Wilson wrote:
> On Fri, Sep 12, 2014 at 08:53:35PM +0300, ville.syrjala at linux.intel.com wrote:
> > From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > 
> > IVB introduced the CUR_FBC_CTL register which allows reducing the cursor
> > height down to 8 lines from the otherwise square cursor dimensions.
> > Implement support for it.
> > 
> > Commandeer the otherwise unused intel_crtc->cursor_size to track the
> > current value of CUR_FBC_CTL so that we can avoid duplicating the
> > complicated device type checks in i9xx_update_cursor().
> > 
> > One caveat to note is that CUR_FBC_CTL can't be used with 180 degree
> > rotation, so when cursor rotation gets introduced some extra checks are
> > needed.
> 
> Where would be a good place to put that note into a comment?

I guess I could stick it into cursor_size_ok().

> 
> So other than the mystery of rotated cursors, the code looks clear
> enough. One side question, is the CHV/VLV conflation correct here?

Yes. It's still the same old g4x derived display controller.

-- 
Ville Syrjälä
Intel OTC