[Intel-gfx] [PATCH 2/6] drm: introduce color correction properties

Matt Roper matthew.d.roper at intel.com
Wed Jan 27 01:02:44 PST 2016

On Mon, Jan 25, 2016 at 10:57:51AM +0000, Daniel Stone wrote:
> Hi,
> On 22 January 2016 at 21:20, Matt Roper <matthew.d.roper at intel.com> wrote:
> > Probably should have noticed/commented on this on your previous
> > iteration, but should we also restrict these new properties to be
> > atomic-only?  I thought there was a consensus a while back that new
> > functionality would only be exposed for atomic-ready userspace.  That
> > would mean also adding DRM_MODE_PROP_ATOMIC to your flags at creation.
> > Sorry for not noticing this when I commented before!
> I don't really see a reason to mandate atomic for these. They'll still
> work with normal prop sets, every bit as well/badly as pre-atomic has
> always worked.

Yeah, I agree that these could still work for legacy.  But I thought the
goal was to make new common properties atomic-only to help push atomic
as the API of the future and also to reduce the possibility of new
kernel properties confusing any poorly-written existing userspace.

I thought danvet had written something about that a while back, but I
could be completely misremembering.  If the consensus is that exposing
these for non-atomic is okay, then I don't have any serious objections
to that.



> Cheers,
> Daniel

Matt Roper
Graphics Software Engineer
IoTG Platform Enabling & Development
Intel Corporation
(916) 356-2795

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