Hi Peter,
> Peter Robinson <pbrobinson@xxxxxxxxx> hat am 8. Januar 2019 um 09:56 geschrieben:
>
>
> Hi Stefan,
>
> > > > This patch series improves the load/unload of bcm2835 camera and audio
> > > > drivers. It has been tested with Raspberry Pi 3 B and a camera module V1.
> > > >
> > > > This series based on current linux-next and Phil Elwell's series ("Improve VCHIQ
> > > > cache line size handling"). After Nicolas' series ("staging: vc04_services:
> > > > Some dead code removal") has been applied, i will rebase my series.
> > >
> > > I tried testing this series applied to 4.20 with the camera module.
> >
> > first of all this crash should never happend.
>
> What do you mean by that?
looks like you spotted an issue in the bail out code which is very likely not fixed yet.
But i assume this wasn't your intention. You want to use the RPi camera with Linux 4.20.
>
> > But why didn't you applied the series which was actually applied to mainline?
> > Did you apply the rest of Phil's DT series as mentioned in the cover letter?
>
> I'm fairly certain I have Phil's "Improve VCHIQ cache line size
> handling" patch series applied if that's the one you mean, I will
> check (I'm currently dealing with 4 different kernels for maintenance
> so I'm sorry if my memory isn't exact).
That's correct. Btw you will need a recent raspberrypi-firmware (iirc since 10/2018), too.
>
> > > I
> > > tried with qv4l2 (from v4l-utils) and using cheese, which in turn uses
> > > gstreamer.
> >
> > Please provide the exact commandline and version.
>
> That was the command line, it pops up a GUI and then just taking a
> still. The version is the latest upstream which is 1.16.3.
Thanks, i will try to reproduce it.
>
> > > I basically get the same crash for both options. Desktop is
> > > LXDE on 32 bit Fedora 29.
> > >
> > > I've not yet tried with 5.0-rc1 but it looks like it has this patch
> > > series and some other bits for the vchiq drivers in staging.
> >
> > Please try 5.0-rc1 which would be more helpful.
>
> Yes, it's on my list.
>
> > Maybe this sounds like a lame excuse but the intension of this series wasn't to get the driver fully operational. I think this is more Dave's expertise.
>
> Well like so much stuff on the Raspberry Pi there's users that are
> testing it and want to use it so when people bother me I test it and
> provide feedback to the patches, if you don't want feedback I'll stop
> testing and just disable it and send people upstream for details so
> they don't bother me!
Please don't get me wrong. I'm very thankful to all this feedback. I know this isn't a very thankful job to offer a very close to mainline distribution and users expect the same behavior like on Raspbian. Without yours and others feedback we wont get much further.
All i wanted to say was: please don't expect too much. It took nearly a year to fix this VCHIQ corruption. I think for the audio and camera stuff, we are just at the beginning ...
So please keep up this good work.
Stefan
>
> Peter
>
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