[Mesa-dev] [PATCH 00/13] implement EGL_EXT_image_dma_buf_import_modifiers

[Emil Velikov]

On 18 November 2016 at 15:26, Marek Olšák <maraeo at gmail.com> wrote:
> On Nov 18, 2016 2:55 PM, "Emil Velikov" <emil.l.velikov at gmail.com> wrote:
>>
>> [Pardon for dropping in uninvited]
>>
>> On 15 November 2016 at 18:04, Marek Olšák <maraeo at gmail.com> wrote:
>>
>> > Immutable metadata (modifiers) stored in the kernel is the only
>> > scalable (and thus usable) solution here. There was an argument
>> > against _mutable_ metadata attached to BOs and the synchronization
>> > hell it can cause, but I've not seen any argument against _immutable_
>> > metadata. Trying to push the metadata (modifiers) through window
>> > system protocols seems like a horrible idea to me, not just because of
>> > that fact that window system protocols shouldn't care about
>> > driver-specific stuff, but also because of the immense burden once you
>> > realize that you have to fix all window system protocols and KMS apps
>> > because 64 bits of metadata is not enough to support your hardware.
>> > It's clearly not economically sustainable.
>> >
>> Wasn't this one of the things that were [supposed to be] discussed at
>> XDC as part of the gbm2/liballoc ?
>> Not too sure on the topic, so a simple yes/no would be appreciated.
>
> Yes. There is also a thread on dri-devel About it.
>
Afaict the dri-devel thread started after XDC. Seemingly you/others
did not had the chance to have a productive brainstorming discussion
and/or reach a consensus ?
Either way, I won't deviate the thread any more.

Thanks
Emil