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

[Nicolas Dufresne <nicolas@ndufresne.ca>]

Le lundi 06 décembre 2021 à 10:20 +0100, Lucas Stach a écrit :
> Am Freitag, dem 03.12.2021 um 14:37 -0500 schrieb Nicolas Dufresne:
> > Le vendredi 03 décembre 2021 à 08:46 -0800, Tim Harvey a écrit :
> > > On Thu, Dec 2, 2021 at 8:34 PM Nicolas Dufresne <nicolas@ndufresne.ca> wrote:
> > > > 
> > > > Le mardi 30 novembre 2021 à 11:28 -0800, Tim Harvey a écrit :
> > > > > On Tue, Nov 30, 2021 at 6:00 AM Ezequiel Garcia
> > > > > <ezequiel@vanguardiasur.com.ar> wrote:
> > > > > > 
> > > > > > Hi Tim,
> > > > > > 
> > > > > > On Mon, 29 Nov 2021 at 16:36, Tim Harvey <tharvey@gateworks.com> wrote:
> > > > > > > 
> > > > > > > On Mon, Nov 29, 2021 at 10:59 AM Adam Ford <aford173@gmail.com> wrote:
> > > > > > ..
> > > > > > > > 
> > > > > > > 
> > > > > > > Adam,
> > > > > > > 
> > > > > > > What deps did you install in order to get v4l2codecs building? I
> > > > > > > installed libgudev-1.0-dev based on Nicolas' suggestion and rebuilt
> > > > > > > (not sure if I needed to re-configure somehow) but there is still
> > > > > > > nothing in build/subprojects/gst-plugins-bad/sys/v4l2codecs/. A 'meson
> > > > > > > configure' tells me that v4l2codecs is set to 'auto' but I'm not sure
> > > > > > > how to find out what dependencies are needed or what may be missing.
> > > > > > > 
> > > > > > 
> > > > > > At least in my case (Centps-derivative), this is what I've done:
> > > > > > 
> > > > > > ...
> > > > > > gst-plugins-bad| Run-time dependency gudev-1.0 found: NO (tried
> > > > > > pkgconfig and cmake)
> > > > > > 
> > > > > > Installed gudev ... and then:
> > > > > > 
> > > > > > ...
> > > > > > gst-plugins-bad| Dependency gudev-1.0 found: YES 232 (cached)
> > > > > > ...
> > > > > > gst-plugins-bad 1.19.3.1
> > > > > > 
> > > > > >     Plugins               : accurip, adpcmdec, adpcmenc, aiff, asfmux,
> > > > > > audiobuffersplit, audiofxbad, audiomixmatrix, audiolatency,
> > > > > > audiovisualizers, autoconvert, bayer,
> > > > > >                             camerabin, codecalpha, coloreffects,
> > > > > > debugutilsbad, dvbsubenc, dvbsuboverlay, dvdspu, faceoverlay,
> > > > > > festival, fieldanalysis, freeverb, frei0r,
> > > > > >                             gaudieffects, gdp, geometrictransform,
> > > > > > id3tag, inter, interlace, ivfparse, ivtc, jp2kdecimator, jpegformat,
> > > > > > rfbsrc, midi, mpegpsdemux,
> > > > > >                             mpegpsmux, mpegtsdemux, mpegtsmux, mxf,
> > > > > > netsim, rtponvif, pcapparse, pnm, proxy, legacyrawparse,
> > > > > > removesilence, rist, rtmp2, rtpmanagerbad,
> > > > > >                             sdpelem, segmentclip, siren, smooth,
> > > > > > speed, subenc, switchbin, timecode, transcode, videofiltersbad,
> > > > > > videoframe_audiolevel, videoparsersbad,
> > > > > >                             videosignal, vmnc, y4mdec, decklink, dvb,
> > > > > > fbdevsink, ipcpipeline, nvcodec, shm, v4l2codecs, hls, sctp
> > > > > > 
> > > > > > GStreamer current master build fails. It's a known issue which will be
> > > > > > fixed today:
> > > > > > 
> > > > > > [...]
> > > > > > [8/9] Compiling C object
> > > > > > subprojects/gst-plugins-bad/sys/v4l2codecs/libgstv4l2codecs.so.p/gstv4l2codecvp9dec.c.o
> > > > > > FAILED: subprojects/gst-plugins-bad/sys/v4l2codecs/libgstv4l2codecs.so.p/gstv4l2codecvp9dec.c.o
> > > > > > cc -Isubprojects/gst-plugins-bad/sys/v4l2codecs/libgstv4l2codecs.so.p
> > > > > > -Isubprojects/gst-plugins-bad/sys/v4l2codecs
> > > > > > -I../subprojects/gst-plugins-bad/sys/v4l2codecs
> > > > > > -Isubprojects/gst-plugins-bad -I../subprojects/gst-plugins-bad
> > > > > > -Isubprojects/gstreamer/libs -I../subprojects/gstreamer/libs
> > > > > > -Isubprojects/gstreamer -I../subprojects/gstreamer
> > > > > > -Isubprojects/gst-plugins-bad/gst-libs
> > > > > > -I../subprojects/gst-plugins-bad/gst-libs
> > > > > > -Isubprojects/gst-plugins-base/gst-libs
> > > > > > -I../subprojects/gst-plugins-base/gst-libs -Isubprojects/orc
> > > > > > -I../subprojects/orc -Isubprojects/gstreamer/gst
> > > > > > -Isubprojects/gst-plugins-base/gst-libs/gst/video
> > > > > > -Isubprojects/gst-plugins-base/gst-libs/gst/pbutils
> > > > > > -Isubprojects/gst-plugins-base/gst-libs/gst/audio
> > > > > > -Isubprojects/gst-plugins-base/gst-libs/gst/tag
> > > > > > -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include
> > > > > > -I/usr/include/gudev-1.0 -fdiagnostics-color=always
> > > > > > -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -O2 -g -fvisibility=hidden
> > > > > > -fno-strict-aliasing -DG_DISABLE_DEPRECATED -Wmissing-prototypes
> > > > > > -Wdeclaration-after-statement -Wold-style-definition
> > > > > > -Wmissing-declarations -Wredundant-decls -Wwrite-strings -Wformat
> > > > > > -Wformat-security -Winit-self -Wmissing-include-dirs -Waddress
> > > > > > -Wno-multichar -Wvla -Wpointer-arith -fPIC -pthread -DHAVE_CONFIG_H
> > > > > > -MD -MQ subprojects/gst-plugins-bad/sys/v4l2codecs/libgstv4l2codecs.so.p/gstv4l2codecvp9dec.c.o
> > > > > > -MF subprojects/gst-plugins-bad/sys/v4l2codecs/libgstv4l2codecs.so.p/gstv4l2codecvp9dec.c.o.d
> > > > > > -o subprojects/gst-plugins-bad/sys/v4l2codecs/libgstv4l2codecs.so.p/gstv4l2codecvp9dec.c.o
> > > > > > -c ../subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.c
> > > > > > ../subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.c:92:3:
> > > > > > error: unknown type name ‘grefcount’
> > > > > >    grefcount ref_count;
> > > > > >    ^~~~~~~~~
> > > > > > ../subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.c: In
> > > > > > function ‘gst_v4l2_codec_vp9_dec_picture_data_new’:
> > > > > > ../subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.c:106:3:
> > > > > > warning: implicit declaration of function ‘g_ref_count_init’; did you
> > > > > > mean ‘g_cond_init’? [-Wimplicit-function-declaration]
> > > > > >    g_ref_count_init (&pic_data->ref_count);
> > > > > >    ^~~~~~~~~~~~~~~~
> > > > > >    g_cond_init
> > > > > > ../subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.c: In
> > > > > > function ‘gst_v4l2_codec_vp9_dec_picture_data_ref’:
> > > > > > ../subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.c:118:3:
> > > > > > warning: implicit declaration of function ‘g_ref_count_inc’; did you
> > > > > > mean ‘g_strv_contains’? [-Wimplicit-function-declaration]
> > > > > >    g_ref_count_inc (&data->ref_count);
> > > > > >    ^~~~~~~~~~~~~~~
> > > > > >    g_strv_contains
> > > > > > ../subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.c: In
> > > > > > function ‘gst_v4l2_codec_vp9_dec_picture_data_unref’:
> > > > > > ../subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.c:125:7:
> > > > > > warning: implicit declaration of function ‘g_ref_count_dec’
> > > > > > [-Wimplicit-function-declaration]
> > > > > >    if (g_ref_count_dec (&data->ref_count)) {
> > > > > >        ^~~~~~~~~~~~~~~
> > > > > > ninja: build stopped: subcommand failed.
> > > > > > 
> > > > > > Hope this helps get you started!
> > > > > > Ezequiel
> > > > > 
> > > > > Ezequiel and Nicolas,
> > > > > 
> > > > > Thanks - I did manage to get gstreamer 1.19.3 built successfully with
> > > > > v4l2codecs finally by getting the correct dependencies. I've attempted
> > > > > to software encode from another system and decode/display on the IMX8M
> > > > > Mini but thus far have not been successful.
> > > > > 
> > > > > I see that v4l2codecs plugin v4l2slh264dec/v4l2slmpeg2dec/v4l2slvp8dec
> > > > > and these all can output video/x-raw NV12/YUY2 which kmssink should
> > > > > accept so I'm attempting the following :
> > > > > 
> > > > > # vp8 encode from x86
> > > > > gst-launch-1.0 -v videotestsrc ! video/x-raw,width=800,height=480 !
> > > > > vp8enc ! rtpvp8pay ! udpsink host=172.24.33.15 port=9001
> > > > > # vp8 decode on imx8mm@172.24.33.15 which has a 800x480 display
> > > > > [gst-main] root@focal-venice:~/gstreamer/build# gst-launch-1.0 -v
> > > > > udpsrc port=9001 caps = "application/x-rtp, media=(string)video,
> > > > > clock-rate=(int)90000, encoding-name=(string)VP8, payload=(int)96,
> > > > > ssrc=(uint)2745262155, timestamp-offset=(uint)2515032683,
> > > > > seqnum-offset=(uint)19579, a-framerate=(string)30" ! rtpvp8depay !
> > > > > v4l2slvp8dec ! kmssink
> > > > > Setting pipeline to PAUSED ...
> > > > > Pipeline is live and does not need PREROLL ...
> > > > > /GstPipeline:pipeline0/GstKMSSink:kmssink0: display-width = 800
> > > > > /GstPipeline:pipeline0/GstKMSSink:kmssink0: display-height = 480
> > > > > Pipeline is PREROLLED ...
> > > > > Setting pipeline to PLAYING ...
> > > > > /GstPipeline:pipeline0/GstUDPSrc:udpsrc0.GstPad:src: caps =
> > > > > application/x-rtp, media=(string)video, clock-rate=(int)90000,
> > > > > encoding-name=(string)VP8, payload=(int)96, ssrc=(uint)2745262155,
> > > > > timestamp-offset=(uint)2515032683, seqnum-offset=(uint)19579,
> > > > > a-framerate=(string)30
> > > > > New clock: GstSystemClock
> > > > > /GstPipeline:pipeline0/GstRtpVP8Depay:rtpvp8depay0.GstPad:sink: caps =
> > > > > application/x-rtp, media=(string)video, clock-rate=(int)90000,
> > > > > encoding-name=(string)VP8, payload=(int)96, ssrc=(uint)2745262155,
> > > > > timestamp-offset=(uint)2515032683, seqnum-offset=(uint)19579,
> > > > > a-framerate=(string)30
> > > > > /GstPipeline:pipeline0/GstRtpVP8Depay:rtpvp8depay0.GstPad:src: caps =
> > > > > video/x-vp8, framerate=(fraction)0/1, height=(int)480, width=(int)800,
> > > > > profile=(string)0
> > > > > ERROR: from element /GstPipeline:pipeline0/GstUDPSrc:udpsrc0: Internal
> > > > > data stream error.
> > > > > Additional debug info:
> > > > > ../subprojects/gstreamer/libs/gst/base/gstbasesrc.c(3127):
> > > > > gst_base_src_loop (): /GstPipeline:pipeline0/GstUDPSrc:udpsrc0:
> > > > > streaming stopped, reason not-negotiated (-4)
> > > > > Execution ended after 0:00:02.076839644
> > > > > Setting pipeline to NULL ...
> > > > > Freeing pipeline ...
> > > > > 
> > > > > I'm getting the same thing when trying to use h264.
> > > > > 
> > > > > I've never quite been able to grasp how to debug GStreamer's
> > > > > negotiation issues. If I end with fakesink it appears to decode so it
> > > > > must be the v4l2slvp8dec to kmssink. I tried forcing the pixel format
> > > > > using 'v4l2slvp8dec ! "video/x-raw,format=(string)NV12" ! kmssink' but
> > > > > I still get the negotiation error.
> > > > > 
> > > > > What interrupts should I be seeing in /proc/interrupts? I don't see
> > > > > anything vpu/hantro related there.
> > > > > 
> > > > > I also want to make sure I have a basic understanding of the vpu
> > > > > drivers and usersapce on the IMX8M Mini. The IMX6Q/DL that I'm more
> > > > > familiar with has a vpu that is supported by the GStreamer video4linux
> > > > > plugin which shows the following (on GStreamer 1.16.2):
> > > > >   v4l2jpegenc: V4L2 JPEG Encoder
> > > > >   v4l2jpegdec: V4L2 JPEG Decoder
> > > > >   v4l2h264enc: V4L2 H.264 Encoder
> > > > >   v4l2mpeg4enc: V4L2 MPEG4 Encoder
> > > > >   v4l2mpeg4dec: V4L2 MPEG4 Decoder
> > > > >   v4l2mpeg2dec: V4L2 MPEG2 Decoder
> > > > >   v4l2h264dec: V4L2 H264 Decoder
> > > > > The IMX6Q/DL also has an IPU that has an M2M driver that provides the
> > > > > following for scaling/colorspace conversion:
> > > > >   v4l2convert: V4L2 Video Converter
> > > > > 
> > > > > I believe what I'm reading is that the IMX8M Mini Hantro codecs are
> > > > > 'stateful' where more software is required to drive them and is
> > > > 
> > > > 'stateless'. the rest is right.
> > > > 
> > > > > supported by the newer v4l2codecs plugin. I haven't been able to
> > > > > understand what kernel version/requirements the v4l2codecs plugin
> > > > > users/requires.
> > > > 
> > > > After H264 debacle with 5.9, 5.10 and 5.11 API break and GStreamer not getting
> > > > enough release to support all of these we started merging support for CODECs
> > > > only when the stable uAPI land. I made an exception for VP9 as it is already
> > > > applied in the media tree and didn't want to miss 1.20 release.
> > > > 
> > > > So to answer you question, it depends on when the CODEC uAPI landed.
> > > > 
> > > 
> > > Ok, thanks for the explanation.
> > > 
> > > > > 
> > > > > I'm also trying to understand how we can get scaling/colorspace
> > > > > conversion on the IMX8M Mini. The IMX8M lacks an IPU... is there some
> > > > > way to utilize scaling/colorspace conversion from the 2D GPU bound to
> > > > > the etnaviv driver?
> > > > 
> > > > The concept of the mini, is that you would be using th encoder for anything that
> > > > isn't going to the display. So they only integrated the Hantro PP on the
> > > > encoder. Unfortunately, you'll have to be patient for mainline stateless encoder
> > > > support, we barely scratch the surface of this subject, but its being worked on.
> > > 
> > > After some searching for Hantro PP I see that the IMXMQ (IMX8M
> > > Dual/QuadLite/Quad) mentions Hantro PP. From the IMX8MDQLQRM section
> > > 14.1.2.1 Decoder Features:
> > > <quote>
> > > Video post-processing features
> > >  - Frame rotation 90 degrees left/right
> > >  - Frame mirroring horizontally/vertically
> > >  - Frame cropping
> > >  - Frame conversion from YCbCr formats to 16-bit or 32-bit RGB formats
> > >  - Frame scaling with maximum up-scaling factor of 3
> > >  - Two rectangular or alpha blending masks for output frame
> > > 
> > >  The post-processing features can be used in pipeline with the
> > > decoder. The postprocessing features can also be used as stand-alone,
> > > without performing any decoding
> > > </quote>
> > > 
> > > The above is under the VPU_G1 section and the same is not mentioned
> > > for VPU_G2 and the IMX8MQ doesn't have encode support. Where do you
> > > see that the IMX8MM has the Hantro PP on the H1? I know the TRM's lack
> > > a lot of info so perhaps you know more about the internals than what
> > > the TRM states.
> > 
> > I've got told that by someone with contacts at NXP recently (in IRC). I haven't
> > verified it though, it just made sense for the targeted use of th mini. Hantro 
> > G1 driver does not yet expose an M2M for the standalone mode of the PP, but
> > shall be possible. Decode an PP cannot run concurrently though, so concurrent PP
> > and decode will have big impact on performance.
> > 
> > The G2 PP is different, but I *think* its always there. It's not doing much,
> > linear NV12 (detiling from 4x4 linear tiles), and can scale down by factor of 2,
> > 4 an 8. If there is more feature I'm not aware.
> > 
> > > 
> > > I also found on a forum
> > > (https://community.nxp.com/t5/i-MX-Processors/imx8mq-Hantro-G1-scaling/m-p/1285343)
> > > that NXP's BSP doesn't use the Hantro for scaling (and likely not csc
> > > either) and they use the GPU instead. I'm still unclear if/how you
> > > could tap into the 2D GPU to use its scaling/conversion if it's bound
> > > to the etnaviv driver.
> > > 
> > > > Unlike the IMX8MQ, you don't have the option to output YUYV (packed yuv 4:2:2)
> > > > which would satisfy the 2D GPU support hoold to the DMABuf import path.
> > 
> > As I'm saying above, you can't, there is no NV12 support in that 2D GPU from
> > what I was old by Etnaviv folks, only YUYV (4:2:2 packed). Shaders is the only
> > option.
> > 
> That's not correct. The 3D GPU can sample directly from YUYV, so it's
> the optimal zero-copy format if you are going to use the video with the
> 3D GPU. Most of the 2D GPU cores (and I think the one of the 8MM is no
> exception) can handle planar formats, some of them only at reduced rate
> of 1 Pixel/clock, instead of the usual 2 Pixels/clock.

Isn't that enough to disqualify that as "optimal" ?

> > > > 
> > > > When the display driver gets ready and upstream (it's been only 2-3 years now),
> > > > you'll get linear NV12 support along with G2 compression support (this one is
> > > > not supported by the GPU, so it will be tricky to expose in userland). I don't
> > > > think the display support 4L4 tiles, but you GPU most likely can do with the
> > > > right shared and texelFetch() or vulkan equivalent if that exist on that target.
> > > 
> > > Do you mean the Samsung Exynos DRM driver (which doesn't yet have
> > > support for IMX8MM) or drivers/gpu/drm/mxsfb?
> > > 
> > > I'm currently using a pretty old patchset that adds IMX8MM support to
> > > the drm/exynos driver. I'm way out of my realm when talking about
> > > GPU/VPU and display drivers.
> > 
> > Didn't know the mini was using Samsung display controller. Didn't even know that
> > chip could exist outside of Exynos chips. On imx8mq, they have a NXP display
> > chip and it is new. Downstream driver exist, and upstream driver is being worked
> > on.
> 
> The display controller on the 8MM is derived from the existing simple
> eLCDIF controllers found on earlier i.MX SoCs. 8MQ is the only one with
> the very capable DCSS display controller. In fact the 8MQ DCSS is
> upstream, what is missing is the Cadence eDP/HDMI bridge driver. The
> MIPI-DSI controller and PHY on the 8MM is Samsung IP.

Thanks for clarification.

> 
> Regards,
> Lucas
> 


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