[RFC] Deprecation and removal of the drm2 driver

[Johannes Lundberg]

On Mon, May 21, 2018 at 8:01 PM, Ian FREISLICH <
ian.freislich at capeaugusta.com> wrote:

> Niclas
>
>
> On 05/18/2018 01:58 PM, Niclas Zeising wrote:
>
>> [ Cross posted to freebsd-current@ and freebsd-x11 at .  Please respect
>> reply-to and send all replies to freebsd-x11 at .  Thanks! ]
>>
>>
>> Hi!
>> I propose that we remove the old drm2 driver (sys/dev/drm2) from
>> FreeBSD.  I suggest the driver is marked as deprecated in 11.x and removed
>> from 12.0, as was done for other drivers recently.  Some background and
>> rationale:
>>
>> The drm2 driver was the original port of a KMS driver to FreeBSD. It was
>> done by Konstantin Belousov to support Intel graphics cards, and later
>> extended by Jean-Sébastien Pédron as well as Konstantin to match what's in
>> Linux 3.8.  This included unstable support from Haswell, but nothing newer
>> than that.
>>
>> For quite some time now we have had the graphics/drm-stable-kmod and
>> graphics/drm-next-kmods which provides support for modern AMD and Intel
>> graphics cards.  These ports, together with the linuxkpi, or lkpi, has made
>> it significantly easier to port and update our graphics drivers. Further,
>> these new drivers cover the same drivers as the old drm2 driver.
>>
>> What does the community think?  Is there anyone still using the drm2
>> driver on 12-CURRENT?  If so, what is preventing you from switching to the
>> port?
>>
>
> I'm running -CURRENT on all my systems.  I have a "3rd Gen" HD Graphics
> 4000 that I'm running drm-next on but I'm about to revert to drm2 because
> of instabilities.  Xorg spontaneously crashes, and doesn't on drm2. I also
> have a Haswell system running drm2 which I have not tried drm-next because
> SWMBO is particularly intolerant of stuff not working.
>

If drm-next-kmod is causing issues, please try drm-stable-kmod. (we should
really rename drm-next to drm-unstable/beta..)


>
> I also ran drm-next successfully on a Sunrise Point-LP system with "Intel
> UHD Graphics 620" because drm2 didn't support the graphics chip before
> switching to linux to get the trackpad and sound working.
>
> I guess the situation is that your mileage may vary depending on your
> system.  I'm OK with installing drm2 from ports, but at this point I'm not
> really OK with loosing drm2 at this stage because of the instability in
> drm-next on my one system.
>
> Ian
>
> --
>
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