Re: [PATCH 2/2] drm: parse color format support for digital displays

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On Sat, 16 Apr 2011 06:42:44 +1000
Dave Airlie <airlied@xxxxxxxxx> wrote:

> On Sat, Apr 16, 2011 at 6:39 AM, Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx> wrote:
> > On Sat, 16 Apr 2011 06:10:07 +1000
> > Dave Airlie <airlied@xxxxxxxxx> wrote:
> >
> >> > -
> >> > +#define DRM_COLOR_FORMAT_RGB444                (1<<0)
> >> > +#define DRM_COLOR_FORMAT_YCRCB444      (1<<1)
> >> > +#define DRM_COLOR_FORMAT_YCRCB422      (1<<2)
> >> >  /*
> >> >  * Describes a given display (e.g. CRT or flat panel) and its limitations.
> >> >  */
> >> > @@ -201,6 +203,7 @@ struct drm_display_info {
> >> >        unsigned int bpc;
> >> >
> >> >        enum subpixel_order subpixel_order;
> >> > +       unsigned long color_formats;
> >>
> >> ^ wtf?
> >>
> >> unsigned long? its 2011.
> >
> > That doesn't tell me much about what you'd prefer...  I figured a
> > bitfield would be fairly extensible if new surface formats were added.
> > Maybe you're thinking it's not enough to support all the misc ones out
> > there though?
> 
> Its unsigned long, its a different size on 32 and 64-bit, not
> something I want to fall
> over when you add the 33rd bit field.

I hope we don't get to more than 32, but sure I'll change it to u32 to
match some of the other flags.

-- 
Jesse Barnes, Intel Open Source Technology Center
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