drm changes and updating to 12.0

[Carsten Mattner]

On Mon, Nov 5, 2018 at 10:18 PM Johannes Lundberg <johalun0 at gmail.com> wrote:
>
> On Mon, Nov 5, 2018 at 10:05 PM Carsten Mattner <carstenmattner at gmail.com> wrote:
>>
>> On Mon, Nov 5, 2018 at 7:00 PM Johannes Lundberg <johalun0 at gmail.com> wrote:
>>
>> > Which Linux version is tracked is listed in the port info.
>> > drm-stable-kmod is currently at Linux 4.9
>> > drm-devel-kmod is currently at Linux 4.16
>>
>> This is very useful to know. I can't find the Linux kernel version in
>> drm-legacy-kmod metadata. Is it a mix of different kernel releases?
>
>
> According to the old, abandoned wiki page it seems to be Linux 3.8.
> (zeising: we should add this info to drm-legacy)
> https://wiki.freebsd.org/Graphics
>
> That was developed by the previous graphics team with all different
> members (for the kernel drivers) so to be honest I don't know much
> details about the old drm code.

Thanks for the info. Older drm releases are more reliable on older
chips because the Intel devs don't test on older GPUs as much
and have introduced major regressions. For instance, Sandy Bridge
only works with 0 issues up until 4.1 and is okay'ish on 4.4.x.
It's good to know that the 3.8 code is still there though, in case
the 4.9 branch (drm-stable-kmod) has too many regressions. That is,
up until the regressions (all reported in freedesktop's bugzilla)
are fixed in 4.2x.y (or 5.x), hopefully :).

tl;dr: thank you for the choice in drm kmods, it's very useful!