[Mesa-dev] [PATCH] nv50: limit the maximum number of samplers to 16

Ilia Mirkin imirkin at alum.mit.edu
Mon Jul 13 11:54:31 PDT 2015

On Mon, Jul 13, 2015 at 2:44 PM, Emil Velikov <emil.l.velikov at gmail.com> wrote:
> On 13 July 2015 at 19:30, Ilia Mirkin <imirkin at alum.mit.edu> wrote:
>> On Mon, Jul 13, 2015 at 2:28 PM, Emil Velikov <emil.l.velikov at gmail.com> wrote:
>>> On 13 July 2015 at 17:32, samuel.pitoiset <samuel.pitoiset at gmail.com> wrote:
>>>> On 13/07/2015 18:08, Emil Velikov wrote:
>>>>> Is there some widely know issue with it ? mesa & envytools does not
>>>>> mention anything (based of a quick scan).
>>>> There is no know issue with NV50_3D_BIND_TSC2, but Ilia doesn't seem to want
>>>> to use it. :-)
>>>> That's why I followed his suggestion by reducing the max. number of samplers
>>>> to 16 like for nvc0.
>>> Ack, thanks for the confirmation. Currently it reads like a warning
>>> sign "stay away from XXX" - so if you want to you can soften if a bit.
>> "stay away from BIND_TSC2" is right. It's very much not to be used for
>> regular applications from what I can tell.
> I guess I'm having a dull moment and cannot justify the "hostility"
> towards it. Is it solely based upon "the blob does not use it so we
> shouldn't either" or is there something else ? Perhaps they cannot be
> bothered to hook it up. Should that be a discouragement towards using
> it in nouveau ?

It's an extra 2 (not 16 as the original patch thought!) samplers.
Whole separate system for setting them. Seems like they may have been
separate for a reason. There's no API reason to expose them either.


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