[RFC] Host1x/TegraDRM UAPI

[Mikko Perttunen]

On 6/26/20 2:06 PM, Karol Herbst wrote:
> On Tue, Jun 23, 2020 at 3:03 PM Mikko Perttunen <cyndis at kapsi.fi> wrote:
>>
>> # Host1x/TegraDRM UAPI proposal
>>
>> This is a proposal for a stable UAPI for Host1x and TegraDRM, to replace
>> the current TegraDRM UAPI that is behind `STAGING` and quite obsolete in
>> many ways.
>>
>> I haven't written any implementation yet -- I'll do that once there is
>> some agreement on the high-level design.
>>
>> Current open items:
>>
>> * The syncpoint UAPI allows userspace to create sync_file FDs with
>> arbitrary syncpoint fences. dma_fence code currently seems to assume all
>> fences will be signaled, which would not necessarily be the case with
>> this interface.
>> * Previously present GEM IOCTLs (GEM_CREATE, GEM_MMAP) are not present.
>> Not sure if they are still needed.
>>
> 
> Hi, as this wasn't addressed here (and sorry if I missed it): is there
> an open source userspace making use of this UAPI? Because this is
> something which needs to be seen before it can be included at all.
> 

Hi Karol,

not currently, but once we have hashed out the design a little bit (and 
I'm back from vacation), I'll work on open source userspace and 
converting existing code using the staging UAPI to this one.

Mikko