[Intel-gfx] [PATCH] drm: Describe the Rotation property bits.

[Robert Fekete]

On mån, 2015-11-02 at 16:50 +0200, Ville Syrjälä wrote:
> On Mon, Nov 02, 2015 at 03:24:15PM +0100, Robert Fekete wrote:
> >     Adds clarification of the rotation property bits. I.e. rotation is
> >     Counter clockwise and that reflects are applied before any rotation.
> > 
> > Signed-off-by: Robert Fekete <robert.fekete at linux.intel.com>
> > ---
> >  include/drm/drm_crtc.h | 6 +++++-
> >  1 file changed, 5 insertions(+), 1 deletion(-)
> > 
> > diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
> > index 3f0c6909dda1..45334fa0cb10 100644
> > --- a/include/drm/drm_crtc.h
> > +++ b/include/drm/drm_crtc.h
> > @@ -85,7 +85,11 @@ static inline uint64_t I642U64(int64_t val)
> >  	return (uint64_t)*((uint64_t *)&val);
> >  }
> >  
> > -/* rotation property bits */
> > +/*
> > + * Rotation property bits. Rotate-(degrees)
> 
> the "rotate-" and "reflect-" things were supposed to be the names of the
> property bits. I guess some quotes around them would have been good.
> 
> In any case, I tink here we should refer to the define names. eg
> "DRM_ROTATE_<degrees> rotates the image by the ..."

Thanks for noticing. You are absolutely right, V2 coming up in a sec.

> > rotates the image by the specified
> > + * amount in degrees in counter clockwise direction. reflect-x and reflect-y
> 
> same here with
> "DRM_REFLECT_X and DRM_REFLECT_Y ..."

Yes!

> > + * reflects the image along the specified axis prior to rotation
> > + */
> >  #define DRM_ROTATE_MASK 0x0f
> >  #define DRM_ROTATE_0	0
> >  #define DRM_ROTATE_90	1
> > -- 
> > 1.9.1
> > 
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx at lists.freedesktop.org
> > http://lists.freedesktop.org/mailman/listinfo/intel-gfx
> 

-- 
BR
/Robert Fekete
Intel Open Source Technology Center