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

[Tim Harvey <tharvey@gateworks.com>]

On Sat, Nov 20, 2021 at 7:36 AM Adam Ford <aford173@gmail.com> wrote:
>
> On Fri, Nov 19, 2021 at 5:37 PM Adam Ford <aford173@gmail.com> wrote:
> >
> > On Fri, Nov 19, 2021 at 10:29 AM Nicolas Dufresne <nicolas@ndufresne.ca> 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?

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.

Best regards,

Tim

>
> However, the hanging stops occurring, so I'll be posting a patch to
> update the GPCv2 code.  I can reduce sone device tree duplication, and
> the G2 throws some splat, but that will be a separate discussion.
>
> I can also run v4l2-compliance on the H1 node, and it responds without hanging.
>
> root@beacon-imx8mm-kit:~# v4l2-compliance -d2
> v4l2-compliance SHA: not available
> , 64 bits, 64-bit time_t
>
> Compliance test for hantro-vpu device /dev/video2:
>
> Driver Info:
> Driver name      : hantro-vpu
> Card type        : nxp,imx8mm-vpu-h1-enc
> Bus info         : platform: hantro-vpu
> Driver version   : 5.16.0
> Capabilities     : 0x84204000
> Video Memory-to-Memory Multiplanar
> Streaming
> Extended Pix Format
> Device Capabilities
> Device Caps      : 0x04204000
> Video Memory-to-Memory Multiplanar
>
> < snip>
>
> Total for hantro-vpu device /dev/video2: 46, Succeeded: 46, Failed: 0,
> Warnings: 0
>
> I'll do an RFCv2 on the Hantro G1 and G2 with the H1 removed based on
> the updated GPCv2 code I'll be pushing shortly, but at least the
> system doesn't hang, so I'm fairly confident the power domains are
> working better now even if we cannot support the JPEG.
>
> adam
>
> > >
> > > > >
> > > > > >
> > > > > > > host=192.168.1.146 port=5000
> > > > > > > viewed on client@192.168.1.146 via:
> > > > > > > $ gst-launch-1.0 udpsrc port=5000 ! application/x-rtp,payload=96 !
> > > > > > > rtpjpegdepay ! jpegdec ! autovideosink
> > > > > > >
> > > > > > > For the G1/G2 patches in the series I don't see any Gstreamer
> > > > > > > 'v4l2.*dec' elements. Perhaps I need a newer version of Gstreamer.
> > > > > >
> > > > > > Most likely yes, I suggest building gstreamer/ branch "main", GStreamer has now
> > > > > > a single repository. We are very close to 1.20, which will include stable API
> > > > > > support of H264, MPEG2 and VP8 decoding.
> > > > > >
> > > > >
> > > > > Ok, let me see if I can navigate through the build process and I'll
> > > > > get back to you.
> > > > >
> > > > > Thanks,
> > > > >
> > > > > Tim
> > > > >
> > > > > > >
> > > > > > > I have CSI capture and DSI display currently working on
> > > > > > > imx8mm-venice-gw73xx-0x that I can play with. The CSI sensor only
> > > > > > > supports RAW8/RAW10 (and gstreamer currently only supports RAW8) and I
> > > > > > > can't efficiently convert to something the JPEG encoder likes without
> > > > > > > bayer2rgbneon (a libneon version).
> > > > > > >
> > > > > > > I see from the IMX8MMRM that the 2D GPU supports scaling etc with a
> > > > > > > wide range of data formats but I'm not sure how to tap into this as
> > > > > > > that hardware is managed by the vivante driver. On the IMX6QDL there
> > > > > > > is a separate IPU block that Philipp Zabel wrote a nice mem2mem
> > > > > > > csc/scaler driver for but I don't see any equivalent currently for
> > > > > > > IMX8MM.
> > > > > > >
> > > > > > > Best regards,
> > > > > > >
> > > > > > > Tim
> > > > > >
> > >

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