[Nouveau] [RFC 00/16] drm/nouveau: initial support for GK20A (Tegra K1)

[Stéphane Marchesin]

On Sun, Feb 2, 2014 at 6:44 PM, Alexandre Courbot <acourbot at nvidia.com>wrote:

> On 02/03/2014 04:10 AM, Ilia Mirkin wrote:
>
>> Hi Alexandre,
>>
>> On Fri, Jan 31, 2014 at 10:16 PM, Alexandre Courbot <acourbot at nvidia.com>
>> wrote:
>>
>>> I guess my email address might surprise some of you, so let me
>>> anticipate some
>>> questions you might have. :P Yes, this work is endorsed by NVIDIA.
>>> Several other
>>> NVIDIAns (CC'd), including core GPU experts, have provided significant
>>> technical
>>> guidance and will continue their involvement. Special thanks go to Terje
>>> Bergstrom and Ken Adams for their invaluable GPU expertise, and Thierry
>>> Reding
>>> (at FOSDEM this weekend) for help with debugging and user-space testing.
>>>
>>> Let me also stress that although very exciting, this effort is still
>>> experimental, so I would like to make sure that nobody makes excessive
>>> expectations based on these few patches. The scope of this work is
>>> strictly
>>> limited to Tegra (although given the similarities desktop GPU support
>>> will
>>> certainly benefit from it indirectly), and we do not have any plan to
>>> work on
>>> user-space support. So do not uninstall that proprietary driver just
>>> yet. ;)
>>>
>>> With this being clarified, we are looking forward to getting your
>>> feedback and
>>> working with you guys to bring and improve Tegra K1 support into
>>> Nouveau! :)
>>>
>>
>> I've sent a couple of fairly trivial comments, as you saw, and I
>> suspect that others with a better understanding of the guts will have
>> more substantial architectural feedback, esp after the weekend/FOSDEM.
>> However, since no one's said it already -- welcome to Nouveau!
>>
>
> Thanks! ^_^v
>
> One beginner question: is it appropriate to send kernel patches to the
> nouveau list in addition to dri-devel? The moderation messages I receive
> make me think that this list might rather be intended for general
> discussion.


The moderation was because there are too many CCs: on this thread. A couple
of those could probably be dropped. In any case, I've increased the max.

Stéphane


>
>
>   From the looks of it, you could bring up a full open-source stack with
>> your patches (i.e. Xorg + nouveau DDX + mesa) and use PRIME to render
>> stuff (assuming the actual display hw has an X ddx).  Although I
>> suspect that you're going to want to use your own drivers. Still a
>> little curious if you've tried the open-source stack and whether it
>> worked. [Not sure what the status is of render-node support is in
>> mesa, but perhaps it's enough to try running piglit tests, if you
>> can't get X going with the display HW.]
>>
>
> We are still testing things at libdrm level, but are eventually interested
> in bringing up the existing open-source stack. Our guess (and hope) is that
> it will work nicely almost as-is, minus the fact that the display hardware
> is not handled by Nouveau and we only support render nodes (I have yet to
> look at what the state of render nodes in Mesa is).
>
> For X, Thierry is IIUC working on the display driver, and at some point
> these efforts should join to connect tegradrm and Nouveau using PRIME. We
> are not quite there yet, and since we are working with limited resources it
> will likely require some time, but the fact we could bring up a (seemingly)
> working Nouveau kernel driver with so little code is encouraging.
>
> Thanks,
> Alex.
>
>
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