[libcamera-devel] Need help with RaspberryPI pipeline bringup on Android

[Naushir Patuck]

On Tue, 9 Nov 2021 at 10:26, Naushir Patuck <naush at raspberrypi.com> wrote:

> Hi Roman,
>
> Not sure if the email thread is the best place to discuss your issue, so
> perhaps create a bug report at bugs.libcamera.org.
> Onto the actual issue - it seems like the ISP gets starved of request
> buffers and fails to produce output and the pipeline handler stalls.
> The reason it gets starved is likely to be due to the following errors in
> the log:
>
> 10-07 14:37:46.726   360   442 D libcamera: DEBUG RPISTREAM
> rpi_stream.cpp:226 Queuing buffer 1048579 for ISP Output1
> 10-07 14:37:46.727   360   442 E libcamera: ERROR RPISTREAM
> rpi_stream.cpp:231 Failed to queue buffer for ISP Output1
> 10-07 14:37:46.727   360   442 D libcamera: DEBUG RPISTREAM
> rpi_stream.cpp:226 Queuing buffer 1048580 for ISP Output1
> 10-07 14:37:46.727   360   442 E libcamera: ERROR RPISTREAM
> rpi_stream.cpp:231 Failed to queue buffer for ISP Output1
> 10-07 14:37:46.727   360   442 D libcamera: DEBUG RPISTREAM
> rpi_stream.cpp:226 Queuing buffer 1048581 for ISP Output1
> 10-07 14:37:46.728   360   442 E libcamera: ERROR RPISTREAM
> rpi_stream.cpp:231 Failed to queue buffer for ISP Output1
>
> I cannot tell further why the qbuf ioctl has failed.  Perhaps something in
> dmesg would tell us?  Could you expand on how your request
> buffers have been allocated?
>

Just a pointer for you to investigate... The logs suggest that
V4L2VideoDevice::queueBuffer() fails at:

ret = cache_->get(*buffer);
if (ret < 0)
        return ret;

as all other error paths through that function log a message, and we see
none.  So it may not necessarily be the ioctl that fails.

Naush


>
> Thanks,
> Naush
>
>
> On Mon, 8 Nov 2021 at 20:20, Roman Stratiienko <r.stratiienko at gmail.com>
> wrote:
>
>> Yes, I am on the very latest rpi branch without any custom patches. I had
>> to upgrade it because of new media control used in mainline libcamera.
>>
>> пн, 8 нояб. 2021 г., 22:12 Kieran Bingham <
>> kieran.bingham at ideasonboard.com>:
>>
>>> Hi Roman,
>>>
>>> Quoting Roman Stratiienko (2021-11-08 17:46:56)
>>> > Hi guys,
>>> >
>>> > I have stuck with camera bring-up for Android. Could somebody who has
>>> > experience in it help me to find a right way to solve this. Logs are
>>> > available here:
>>> > https://github.com/kbingham/libcamera/issues/31
>>>
>>> The RPi kernel, and pipeline handler have had a large change recently to
>>> convert to using MediaController. It may require ensuring you have the
>>> latest kernel from RPi, along with the latest libcamera.
>>>
>>> You mentioned that you have " rpi-kernel v5.10.y", do you know if this
>>> contains the commits that update to the new MediaController drivers?
>>>
>>> I assume you are building your own kernel, so you'll want to make sure
>>> you're on the (very, very) latest branch, and it might be something to
>>> check on the RPi forums otherwise.
>>>
>>> --
>>> Kieran
>>>
>>>
>>> >
>>> > Thanks in advance,
>>> > Roman
>>>
>>
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