[RFC PATCH v2 00/17] Host1x/TegraDRM UAPI

[Mikko Perttunen]

On 9/9/20 2:36 AM, Dmitry Osipenko wrote:
> 05.09.2020 13:34, Mikko Perttunen пишет:
>> Hi all,
>>
>> here's a second revision of the Host1x/TegraDRM UAPI proposal,
>> hopefully with most issues from v1 resolved, and also with
>> an implementation. There are still open issues with the
>> implementation:
> Could you please clarify the current status of the DMA heaps. Are we
> still going to use DMA heaps?
> 

Sorry, should have mentioned the status in the cover letter. I sent an 
email to dri-devel about how DMA heaps should be used -- I believe the 
conclusion was that it's not entirely clear, but dma-bufs should only be 
used for buffers shared between engines. So for the time being, we 
should still implement GEM for intra-TegraDRM buffers. There seems to be 
some planning ongoing to see if the different subsystem allocators can 
be unified (see dma-buf heaps talk from linux plumbers conference), but 
for now we should go for GEM.

Mikko