[Intel-gfx] [PATCH] drm/i915: Enable atomic support by default on supported platforms.

[Maarten Lankhorst]

Op 09-02-17 om 14:54 schreef Daniel Stone:
> Hey,
>
> On 9 February 2017 at 12:49, Maarten Lankhorst
> <maarten.lankhorst at linux.intel.com> wrote:
>> Op 02-02-17 om 17:26 schreef Daniel Stone:
>>> On 2 February 2017 at 07:41, Maarten Lankhorst
>>> <maarten.lankhorst at linux.intel.com> wrote:
>>>> Flip the switch!!
>>> Not until we have the multi-CRTC event support please. :\ I don't want
>>> to have divergent event paths for atomic-but-useless-events.
>>>
>>> I've been frantically typing up support for this in Weston (actual
>>> proper atomic modesetting, which is difficult when you have fiercely
>>> independent per-output repaint loops, but seems ~mostly done but for
>>> typing), which I'd hoped to have done a week or two ago but got
>>> derailed due to being sick. It's coming just as quickly as I can type
>>> it tho.
>> The patch for this has been shot down before, due to lack of userspace,
>> but here's a slightly earlier version.
>>
>> https://patchwork.kernel.org/patch/7025111/
>>
>> I guess it's less important now that we support out-fences, which provides
>> a nicer way of waiting for completion.
>>
>> But since this is a problem with atomic core, not i915, do you have any
>> objections specifically against this patch?
> Yeah, it's a pretty good point; we can merge this with a cap so
> userspace can probe whether or not things are usable. There are a few
> other drivers which already expose atomic by default regardless; it
> was less of a problem for them since they're far less likely to be
> used with multiple outputs, but that's not really a fair reason to
> penalise you guys ...
>
> Go for it.
>
> Cheers,
> Daniel

Pushed, thanks!