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List:       linux-tegra
Subject:    Re: [PATCH v2 0/7] Host1x IOMMU support + VIC support
From:       Emil Velikov <emil.l.velikov () gmail ! com>
Date:       2016-12-14 18:26:26
Message-ID: CACvgo51voo_sKZmdEhhyLeycA6xOfC9_WCk4SeD5ojoE+jaoKg () mail ! gmail ! com
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On 14 December 2016 at 12:30, Daniel Vetter <daniel@ffwll.ch> wrote:
> On Wed, Dec 14, 2016 at 01:16:10PM +0200, Mikko Perttunen wrote:
>> This series adds IOMMU support to Host1x and TegraDRM
>> and adds support for the VIC (Video Image Compositor)
>> host1x client. The series is available as a git repository at
>> git://github.com/cyndis/linux.git; branch vic-2.
>>
>> A userspace test case for VIC can be found at
>> https://github.com/cyndis/drm/tree/work/tegra.
>> The testcase is in tests/tegra and is called submit_vic.
>> The testcase/TRM include full headers and documentation
>> to program the unit. The unit by itself, however, does not
>> readily map to existing userspace library interfaces, so
>> implementations for those are not provided.
>
> Afaik libva has an entire pile of post-processing support. Pretty sure
> other video transcode libraries have similar interfaces, so should all be
> possible to implement this.
>
> Until that exists I really think that the VIC part (and only that, since
> tk1/tx1 in general seems to work with nouveau and all that) should stay
> out of tree.
Related:
With render-only about to be merged soon{tm) and Alexandre already
looking at tegra version of it, one should be able to wire this
functionality and use it in mesa/gallium.

Note: this is not an objection against the work - be that about from
quality or inclusion POV.

Emil
P.S. Goes to check on the renderonly topic.
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