[PATCH v2 0/7] Host1x IOMMU support + VIC support

[Daniel Vetter]

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.
-Daniel

> 
> The in-kernel firewall is not implemented for VIC;
> therefore, either the IOMMU must be enabled or the firewall
> disabled for the test to pass.
> 
> Tested with Jetson TX1 (T210). Probably works also
> with Jetson TK1 (T124). Note that due to hardware changes
> the testcase also needs to be changed to run properly
> on T124: this can be done by removing the topmost
> commit of the aforementioned test repository.
> 
> Thanks,
>   Mikko.
> 
> Arto Merilainen (2):
>   drm/tegra: Add falcon helper library
>   drm/tegra: Add VIC support
> 
> Mikko Perttunen (5):
>   drm/tegra: Add Tegra DRM allocation API
>   gpu: host1x: Add IOMMU support
>   dt-bindings: Add bindings for the Tegra VIC
>   arm64: tegra: Enable VIC on T210
>   arm64: tegra: Enable IOMMU for Host1x on Tegra210
> 
>  .../display/tegra/nvidia,tegra20-host1x.txt        |  13 +
>  arch/arm64/boot/dts/nvidia/tegra210.dtsi           |  19 +-
>  drivers/gpu/drm/tegra/Makefile                     |   4 +-
>  drivers/gpu/drm/tegra/drm.c                        | 114 +++++-
>  drivers/gpu/drm/tegra/drm.h                        |  12 +
>  drivers/gpu/drm/tegra/falcon.c                     | 259 ++++++++++++++
>  drivers/gpu/drm/tegra/falcon.h                     | 127 +++++++
>  drivers/gpu/drm/tegra/vic.c                        | 396 +++++++++++++++++++++
>  drivers/gpu/drm/tegra/vic.h                        |  31 ++
>  drivers/gpu/host1x/cdma.c                          |  74 +++-
>  drivers/gpu/host1x/cdma.h                          |   6 +-
>  drivers/gpu/host1x/dev.c                           |  40 ++-
>  drivers/gpu/host1x/dev.h                           |   6 +
>  drivers/gpu/host1x/hw/cdma_hw.c                    |  16 +-
>  drivers/gpu/host1x/job.c                           |  72 +++-
>  drivers/gpu/host1x/job.h                           |   1 +
>  include/linux/host1x.h                             |   1 +
>  17 files changed, 1143 insertions(+), 48 deletions(-)
>  create mode 100644 drivers/gpu/drm/tegra/falcon.c
>  create mode 100644 drivers/gpu/drm/tegra/falcon.h
>  create mode 100644 drivers/gpu/drm/tegra/vic.c
>  create mode 100644 drivers/gpu/drm/tegra/vic.h
> 
> -- 
> 2.10.2
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch