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@xxxxxxxxxx> > > 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(-) >
