Re: [RFC 0/5] arm64: imx8mm: Enable Hantro VPUs

[Ezequiel Garcia]

On Mon, 29 Nov 2021 at 13:48, Adam Ford <aford173@xxxxxxxxx> wrote:
>
> On Tue, Nov 23, 2021 at 2:07 PM Nicolas Dufresne <nicolas@xxxxxxxxxxxx> wrote:
> >
> > Le lundi 22 novembre 2021 à 09:25 -0800, Tim Harvey a écrit :
> > > On Sat, Nov 20, 2021 at 7:36 AM Adam Ford <aford173@xxxxxxxxx> wrote:
> > > >
> > > > On Fri, Nov 19, 2021 at 5:37 PM Adam Ford <aford173@xxxxxxxxx> wrote:
> > > > >
> > > > > On Fri, Nov 19, 2021 at 10:29 AM Nicolas Dufresne <nicolas@xxxxxxxxxxxx> wrote:
> > > > > >
> > > > > > Hi Adam, Tim,
> > > > > >
> > > > > > [...]
> > > > > > > > > > Nicolas and Adam,
> > > > > > > > > >
> > > > > > > > > > For the H1 patches in this series: I've been able to test the IMX8MM
> > > > > > > > > > H1 JPEG encode using GStreamer 1.18.5:
> > > > > > > > > > $ gst-inspect-1.0 | grep -e "v4l2.*enc"
> > > > > > > > > > video4linux2:  v4l2jpegenc: V4L2 JPEG Encoder
> > > > > > > > > > $ gst-launch-1.0 videotestsrc ! jpegenc ! rtpjpegpay ! udpsink
> > > > > > > > >                                   ^ v4l2jpegenc
> > > > > > > > >
> > > > > > > > > This is just a transcript error ?
> > > > > > > >
> > > > > > > > Nicolas,
> > > > > > > >
> > > > > > > > No! Thanks for catching my mistake. I was testing with software encode... ooops!
> > > > > > > >
> > > > > > > > 'gst-launch-1.0 videotestsrc ! v4l2jpegenc ! fakesink' actually hangs
> > > > > > > > the board so likely a power-domain issue there?
> > > > > > >
> > > > > > > The v4l2-compliance tests fail on the h1 decoder with a hang, but I
> > > > > > > think we're writing to registers which are not documented in the Mini
> > > > > > > TRM.  The Mini TRM doesn't explicitly show the JPEG encoding as a
> > > > > > > feature, but some of the registers state JPEG, but because some of the
> > > > > > > registers written for the H1 are not documented in the TRM.  If those
> > > > > > > registers are restricted or not in this SoC, I am concerned that it
> > > > > > > might be related.  I'll try to run some more tests this weekend to
> > > > > > > check on the status of the power-domain stuff.
> > > > > >
> > > > > > To verify if the HW support JPEG encoding you can read SWREG63 bit 25. This is
> > > > > > in the TRM, just not labelled properly. To mimic the decoding side, would be "HW
> > > > > > synthesis config register X" with the bit labelled SW_ENC_JPEG_PROF (but
> > > > > > PROF/profile is on or off). If your board hang while reading this, you likely
> > > > > > didn't get the power bit right.
> > > > > >
> > > > > > IMX8 has an undocumented control block thing that we have been fighting with in
> > > > > > imx8q,  perhaps that's your issue. Few driver was proposed, we are still pending
> > > > > > on NXP solution to be submitted (they asked us to wait, still waiting =)).
> > > > >
> > > > > Nicolas,
> > > > >
> > > > > Thanks for the suggestion to read offset FC.  There was an attempt
> > > > > made by Lucas Stach to develop a VPU blk-ctrl driver to coordinate the
> > > > > power-domains with the GPC driver. Unfortunately, it does appear to
> > > > > hang, so it might not be operating correctly.
> > > > >
> > > > > Lucas,
> > > > >
> > > > > Do you have any idea of stuff I can try to see if the power domain is
> > > > > coming online correctly?
> > > > >
> > > > > [   10.434727] imx-pgc imx-pgc-domain.6: request the vpumix domain to power up
> > > > > [   10.463647] imx-pgc imx-pgc-domain.6: request the vpumix ADB400 to power up
> > > > > [   10.517155] imx-pgc imx-pgc-domain.6: genpd vpumix success
> > > > > [   10.728927] vpu: set fuse bits to enable
> > > > > [   10.825500] imx8m-blk-ctrl 38330000.blk-ctrl: power vpublk-g1 GPC domain
> > > > > [   10.878986] imx-pgc imx-pgc-domain.7: request the vpu-g1 domain to power up
> > > > > [   10.932429] imx-pgc imx-pgc-domain.7: genpd vpu-g1 success
> > > > > [   10.971988] imx8m-blk-ctrl 38330000.blk-ctrl: genpd vpublk-g1 success
> > > > > [   11.004726] hantro-vpu 38300000.video-codec: registered
> > > > > nxp,imx8mm-vpu-dec as /dev/video0
> > > > > [   11.040760] imx8m-blk-ctrl 38330000.blk-ctrl: power vpublk-g2 GPC domain
> > > > > [   11.066181] imx-pgc imx-pgc-domain.8: request the vpu-g2 domain to power up
> > > > > [   11.087887] imx-pgc imx-pgc-domain.8: genpd vpu-g2 success
> > > > > [   11.113808] imx8m-blk-ctrl 38330000.blk-ctrl: genpd vpublk-g2 success
> > > > > [   11.139634] hantro-vpu 38310000.video-codec: registered
> > > > > nxp,imx8mm-vpu-g2-dec as /dev/video1
> > > > > [   11.156463] imx8m-blk-ctrl 38330000.blk-ctrl: power vpublk-h1 GPC domain
> > > > > [   11.170817] imx-pgc imx-pgc-domain.9: request the vpu-h1 domain to power up
> > > > > [   11.232990] imx-pgc imx-pgc-domain.9: genpd vpu-h1 success
> > > > > [   11.252546] imx8m-blk-ctrl 38330000.blk-ctrl: genpd vpublk-h1 success
> > > > > [   11.266152] hantro-vpu 38320000.video-codec: Checking vpu->enc_base + 0xfc
> > > > >
> > > > > <hang>
> > > > >
> > > > > adam
> > > > >
> > > >
> > > > Nicolas, Tim, and Lucas,
> > > >
> > > > I think I have the hanging resolved in the power domains, and I'll be
> > > > pushing the fix to the GPCv2.
> > > >
> > > > For the H1 Encoder, I added some debugging code to read the offset
> > > > 0xfc and print some data based on the findings of that VPU-h1 offset.
> > > > I basically check the various bits per the TRM to see if they are set
> > > > and print some splat to indicate whether or not the function is
> > > > supported.
> > > >
> > > > [    8.861865] hantro-vpu 38320000.video-codec: Checking vpu->enc_base + 0xfc
> > > > [    8.870594] hantro-vpu 38320000.video-codec: Stabilization supported by HW
> > > > [    8.889341] hantro-vpu 38320000.video-codec: VP8 encoding supported by HW
> > > > [    8.899386] hantro-vpu 38320000.video-codec: H.264 encoding supported by HW
> > > > [    8.918171] hantro-vpu 38320000.video-codec: RGB to YUV conversion
> > > > supported by HW
> > > > [    8.934067] hantro-vpu 38320000.video-codec: registered
> > > > nxp,imx8mm-vpu-h1-enc as /dev/video2
> > > >
> > > > Unfortunately, JPEG is not listed as supported.  :-(
> > >
> > > Adam,
> > >
> > > Well not having JPEG encode support is unfortunate, and unexpected. Do
> > > we not have hantro support yet for VP8/H264 encode?
> >
> > There is no mainline support yet. You can derive from RK3288 support using Google ChromeOS method (a v4l2 plugins that simulate in userspace a stateful encoder):
> >
> > - libv4l plugins / https://chromium.googlesource.com/chromiumos/third_party/libv4lplugins/+/refs/heads/master
> > - Kernel Driver / https://chromium.googlesource.com/chromiumos/third_party/kernel/+/chromeos-4.4/drivers/media/platform/rockchip-vpu/
> >
> > >
> > > I haven't quite figured out how to build a modern mono-repo gstreamer
> > > on the ubuntu 20.04 rootfs I'm using so I haven't been able to test
> > > VPU encode/decode properly. I'll keep working on it when I'm back in
> > > the office the following week.
> >
> > Did a quick test to make sure there isn't any ubuntu specific blockers, here's a
> > dirty script that produce a minimal GStreamer, there was really nothing special
> > compare to other meson projects. Note that I use --wrap-mode=nofallback to avoid
> > letting GStreamer complete it's feature-set by downloading the planet. This
> > already build quite a lot and could likely be made smaller by avoid plugins-good
> > build-dep call, but then you need to check for v4l2odecs and video4linux devs
> > (mostly gudev a glib udev binding).
> >
> > # Install ubuntu
> > podman run -it --rm ubuntu:20.04
> > sed -i "s/# deb-src/deb-src/" /etc/apt/sources.list
> > apt update
> > apt build-dep gstreamer1.0-plugins-good
> > apt install git python3-pip flex bison
> >
> > # Need a newer meson
> > pip3 install --user meson
> > export PATH=$PATH:~/.local/bin
> >
> > # Build GStreamer
> > git clone https://gitlab.freedesktop.org/gstreamer/gstreamer.git
> > cd gstreamer
> > meson setup build --wrap-mode=nofallback
> > ninja -C build
> >
> > # Run in-place
> > ./gst-env.py
> > gst-inspect-1.0 v4l2codecs
> > gst-inspect 1.0 video4linux2
> >
> Thanks for the suggestions.
>
> I downloaded what's in the master repo:
>
> [gst-main] root@localhost:~/gstreamer# gst-inspect-1.0 v4l2codecs
>
> ** (gst-plugin-scanner:7317): CRITICAL **: 10:29:51.847: can't find
> gi.repository.Gst
> Plugin Details:
>   Name                     v4l2codecs
>   Description              V4L2 CODEC Accelerators plugin
>   Filename
> /root/gstreamer/builddir/subprojects/gst-plugins-bad/sys/v4l2codecs/libgstv4l2codecs.so
>   Version                  1.19.3.1
>   License                  LGPL
>   Source module            gst-plugins-bad
>   Binary package           GStreamer Bad Plug-ins git
>   Origin URL               Unknown package origin
>
>   v4l2slh264dec: V4L2 Stateless H.264 Video Decoder
>   v4l2slmpeg2dec: V4L2 Stateless Mpeg2 Video Decoder
>   v4l2slvp8alphadecodebin: VP8 Alpha Decoder
>   v4l2slvp8dec: V4L2 Stateless VP8 Video Decoder
>
>   4 features:
>   +-- 4 elements
>
> [gst-main] root@localhost:~/gstreamer# gst-inspect-1.0 video4linux2
> Plugin Details:
>   Name                     video4linux2
>   Description              elements for Video 4 Linux
>   Filename
> /root/gstreamer/builddir/subprojects/gst-plugins-good/sys/v4l2/libgstvideo4linux2.so
>   Version                  1.19.3.1
>   License                  LGPL
>   Source module            gst-plugins-good
>   Binary package           GStreamer Good Plug-ins git
>   Origin URL               Unknown package origin
>
>   v4l2deviceprovider: Video (video4linux2) Device Provider
>   v4l2jpegenc: V4L2 JPEG Encoder
>   v4l2radio: Radio (video4linux2) Tuner
>   v4l2sink: Video (video4linux2) Sink
>   v4l2src: Video (video4linux2) Source
>
>   5 features:
>   +-- 4 elements
>   +-- 1 device providers
>
> I still have the H1 encoder enabled, but I know JPEG isn't supported,
> so I'm going to attempt to do some decoding and pipe to fakesink since
> I don't have a functional display yet.
>
> gst-launch-1.0 -ev filesrc location=trailer_1080p_h264_mp3.avi !
> decodebin3  ! fakesink
>
> Redistribute latency...
> /GstPipeline:pipeline0/GstDecodebin3:decodebin3-0/v4l2slh264dec:v4l2slh264dec0.GstPad:src:
> caps = video/x-raw, format=(string)NV12, width=(int)1920,
> height=(int)1080, interlace-mode=(string)progressive,
> multiview-mode=(string)mono,
> multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono,
> pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1
> /GstPipeline:pipeline0/GstDecodebin3:decodebin3-0.GstGhostPad:video_0:
> caps = video/x-raw, format=(string)NV12, width=(int)1920,
> height=(int)1080, interlace-mode=(string)progressive,
> multiview-mode=(string)mono,
> multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono,
> pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1
> /GstPipeline:pipeline0/GstDecodebin3:decodebin3-0.GstGhostPad:video_0.GstProxyPad:proxypad6:
> caps = video/x-raw, format=(string)NV12, width=(int)1920,
> height=(int)1080, interlace-mode=(string)progressive,
> multiview-mode=(string)mono,
> multiview-flags=(GstVideoMultiviewFlagsSet)0:ffffffff:/right-view-first/left-flipped/left-flopped/right-flipped/right-flopped/half-aspect/mixed-mono,
> pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)25/1
> /GstPipeline:pipeline0/GstDecodebin3:decodebin3-0/GstMultiQueue:multiqueue0:
> min-interleave-time = 300000000
> Redistribute latency...
> /GstPipeline:pipeline0/GstDecodebin3:decodebin3-0/v4l2slh264dec:v4l2slh264dec0.GstPad:sink:
> caps = video/x-h264, variant=(string)itu, framerate=(fraction)25/1,
> width=(int)1920, height=(int)1080, chroma-format=(string)4:2:0,
> bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8,
> parsed=(boolean)true, stream-format=(string)avc, alignment=(string)au,
> profile=(string)high, level=(string)4,
> codec_data=(buffer)01640028ffe1001a67640028acd940780227e584000003000400000300c83c60c65801000668ebe3cb22c0
> New clock: GstSystemClock
>
> And it appears to stream, because the counter increases.  I haven't
> checked the CPU utilization, but the fact that it shows v4l2slh264dec
> is good.
>
> Is there a way to know if/how the decoder is using the proper VPU?  I
> assume if it wasn't using the proper one, it would fail, but was just
> curious.
>

A few ways. You can check /proc/interrupts, which should have
VPU activity.

Or enable debug messages for the module,
using the debug hantro parameter. V4L2 has debug messages
that you can enable, see /sys/class/video4linux/video0/dev_debug.

Instead of fakesink you can output to pngenc/jpegenc and check the output
is visually correct. If at all possible, the proper way is to use Fluster,
and report the score you get:

https://github.com/fluendo/fluster

It should be easy to use.

> I think I'll redo the patch without the RFC and without the H1 encoder
> unless anyone has any objections.  I know I need to rebase on
> linux-next anyway because the patches don't apply cleanly.  Is there a
> specific branch I should use?  I don't know if this goes through
> Shawn's IMX tree or the media tree (or a combination)
>

You should rebase on media's master branch:

https://git.linuxtv.org/media_tree.git/log/

Thanks,
Ezequiel