Re: [GIT PULL] exynos-drm-next

[Daniel Stone <daniel@fooishbar.org>]

Hi Inki,

On 28 October 2015 at 06:55, Inki Dae <inki.dae@samsung.com> wrote:
>    and revive a Exynos specific interface which was used
>    to get fake offset, which is required for application using render node
>    to access a gem memory. For userspace codes for the use of this interface,
>    you can refer to below link,
>            https://github.com/dofmind/libdrm/commit/5cc58d765c61b37a26372de9701f3ffe3a1bef70
>
>    We will post a patch for libdrm after this patch is merged to mainline.

Is there any real (non-libdrm) userspace for this? See Daniel Vetter's
reply to the series here:
'In general we wait with merging new userspace ABI until that's really
ready, since very often there's some corner cases that you just didn't
think about in your toy demo compared to the real thing. Like how to
manage buffer caches/reuse for apps that essentially run forever (like X
server or a compositor).'

Probably my biggest concern is how well this operates with the
proposed PREP/FINI patches. I would really love to see a real
userspace which exercises both MAP and PREP/FINI: if that shows
problems with this interface, then it means we have to carry this
interface forever, _as well as_ a new cleaned-up one.

Cheers,
Daniel
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