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

[Marek Olšák]

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.

Marek

>
> -Emil
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