[PATCH 00/14] staging: media: tegra-vdea: Add Tegra124 support
Hans Verkuil
hverkuil at xs4all.nl
Mon Sep 3 12:18:15 UTC 2018
Hi Thierry, Dmitry,
Dmitry found some issues, so I'll wait for a v2.
Anyway, this driver is in staging with this TODO:
- Implement V4L2 API once it gains support for stateless decoders.
I just wanted to mention that the Request API is expected to be merged
for 4.20. A topic branch is here:
https://git.linuxtv.org/media_tree.git/log/?h=request_api
This patch series is expected to be added to the topic branch once
everyone agrees:
https://www.spinics.net/lists/linux-media/msg139713.html
The first Allwinner driver that will be using this API is here:
https://lwn.net/Articles/763589/
It's expected to be merged for 4.20 as well.
Preliminary H264 work for the Allwinner driver is here:
https://lkml.org/lkml/2018/6/13/399
But this needs more work.
HEVC support, on the other hand, is almost ready:
https://lkml.org/lkml/2018/8/28/229
I hope these links give a good overview of the current status.
Regards,
Hans
On 08/13/2018 04:50 PM, Thierry Reding wrote:
> From: Thierry Reding <treding at nvidia.com>
>
> Hi,
>
> this set of patches perform a bit of cleanup and extend support to the
> VDE implementation found on Tegra114 and Tegra124. This requires adding
> handling for a clock and a reset for the BSEV block that is separate
> from the main VDE block. The new VDE revision also supports reference
> picture marking, which requires that the BSEV writes out some related
> data to a memory location. Since the supported tiling layouts have been
> changed in Tegra124, which supports only block-linear and no pitch-
> linear layouts, a new way is added to request a specific layout for the
> decoded frames. Both of the above changes require breaking the ABI to
> accomodate for the new data in the custom IOCTL.
>
> Finally this set also adds support for dealing with an IOMMU, which
> makes it more convenient to deal with imported buffers since they no
> longer need to be physically contiguous.
>
> Userspace changes for the updated ABI are available here:
>
> https://cgit.freedesktop.org/~tagr/libvdpau-tegra/commit/
>
> Mauro, I'm sending the device tree changes as part of the series for
> completeness, but I expect to pick those up into the Tegra tree once
> this has been reviewed and you've applied the driver changes.
>
> Thanks,
> Thierry
>
> Thierry Reding (14):
> staging: media: tegra-vde: Support BSEV clock and reset
> staging: media: tegra-vde: Support reference picture marking
> staging: media: tegra-vde: Prepare for interlacing support
> staging: media: tegra-vde: Use DRM/KMS framebuffer modifiers
> staging: media: tegra-vde: Properly mark invalid entries
> staging: media: tegra-vde: Print out invalid FD
> staging: media: tegra-vde: Add some clarifying comments
> staging: media: tegra-vde: Track struct device *
> staging: media: tegra-vde: Add IOMMU support
> staging: media: tegra-vde: Keep VDE in reset when unused
> ARM: tegra: Enable VDE on Tegra124
> ARM: tegra: Add BSEV clock and reset for VDE on Tegra20
> ARM: tegra: Add BSEV clock and reset for VDE on Tegra30
> ARM: tegra: Enable SMMU for VDE on Tegra124
>
> arch/arm/boot/dts/tegra124.dtsi | 42 ++
> arch/arm/boot/dts/tegra20.dtsi | 10 +-
> arch/arm/boot/dts/tegra30.dtsi | 10 +-
> drivers/staging/media/tegra-vde/tegra-vde.c | 528 +++++++++++++++++---
> drivers/staging/media/tegra-vde/uapi.h | 6 +-
> 5 files changed, 511 insertions(+), 85 deletions(-)
>
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