Librem 5: hang with cam -C1

[Laurent Pinchart]

On Wed, Mar 26, 2025 at 12:44:28PM +0100, Jacopo Mondi wrote:
> On Wed, Mar 26, 2025 at 12:27:45PM +0100, Pavel Machek wrote:
> > Hi!
> >
> > > > Now I have cam library that pretends to capture frames, but
> > >
> > > Maybe it actually captures one frame ?
> >
> > Should it exit after it does so? :-).
> 
> Well, you asked for one frame (-C1) and it captured one frame :)

I'm not sure it did. The kernel driver may require more than one buffer.

> Sorry I didn't notice in my first reply!
> 
> >
> > With -C100, it actually works, for both front and back cameras.
> >
> 
> great news \o/
> 
> > > > hangs. This is Librem 5, Megapixels works on same hardware, any hints
> > > > would be welcome.
> > > >
> > > > purism at pureos:~/g/libcamera/build$ sudo src/apps/cam/cam -c2 -C1
> > > > [sudo] password for purism:
> > > > [106:52:56.773797302] [120527]  INFO IPAManager ipa_manager.cpp:137 libcamera is not installed. Adding '/home/purism/g/libcamera/build/src/ipa' to the IPA search path
> > > > [106:52:56.782060764] [120527]  INFO Camera camera_manager.cpp:329 libcamera v0.4.0+158-d505bd53
> > > > [106:52:56.821063562] [120528]  WARN CameraSensorProperties camera_sensor_properties.cpp:463 No static properties available for 's5k3l6xx'
> > > > [106:52:56.821163286] [120528]  WARN CameraSensorProperties camera_sensor_properties.cpp:465 Please consider updating the camera sensor properties database
> > > > [106:52:56.854255536] [120528]  WARN CameraSensor camera_sensor_legacy.cpp:669 's5k3l6xx 3-002d': Unsupported ancillary entity function 131074
> > > > Using camera /base/soc at 0/bus at 30800000/i2c at 30a50000/camera at 2d as cam0
> > > > [106:52:56.860899427] [120527]  INFO Camera camera.cpp:1205 configuring streams: (0) 1052x780-SGRBG8
> > > > cam0: Capture 1 frames
> > >
> > > I'm afraid a more detailed log is needed.
> > > Run the above command with
> > >
> > > LIBCAMERA_LOG_LEVELS=0
> > >
> > > As librem5 has no ISP but a RAW sensor as far as I remember (I still
> > > can't figure out what they were thinking when they selected this weird
> > > combination) make sure you have the SimplePipelineHandler and
> > > SoftwareISP compiled in and enabled.
> >
> > Yep, that's correct. I'm afraid combination of RAW sensor and no ISP
> 
> In this specific case, the imx8mq SoC on the librem5 has no physical ISP
> 
> > or no drivers for ISP is going to be common for a while in phone area
> > :-(.
> 
> That's why we're very glad to have the software ISP in libcamera and
> see great improvements there from Milan and others ! ;)

-- 
Regards,

Laurent Pinchart