Capture image from imx219 sensor on i.MX8MM

[Frieder Schrempf]

Hi Laurent,

On 06.02.23 16:31, Laurent Pinchart wrote:
> Hi Frieder,
> 
> On Mon, Feb 06, 2023 at 03:24:41PM +0100, Frieder Schrempf wrote:
>> Hi,
>>
>> I'm trying to get a camera stream on our i.MX8MM board up and running
>> with Linux 6.1. I'm using the RPi v2.1 camera module (imx219) as sensor.
>>
>> I basically copied the devicetree setup from Tim's overlay at
>> arch/arm64/boot/dts/freescale/imx8mm-venice-gw72xx-0x-imx219.dts.
>>
>> With all the drivers enabled the devices (imx219, imx7-media-csi,
>> imx-mipi-csis) seem to probe just fine and I see /dev/video0 and
>> /dev/media0.
>>
>> For the v4l subdevices I would expect to see one for the sensor and one
>> for the CSI bridge. But only the latter is there (see below).
>>
>> Is this correct? Am I missing something? How can I setup/enable the
>> pipeline/stream?
> 
> Your expectations are correct, but the result isn't. You should see the
> camera sensor in the media graph. Has the imx219 been probed by the
> driver ? Did probe succeed ?

Yes, the imx219_probe() works just fine and returns with code 0. I also
see v4l2_async_register_subdev_sensor() and the underlying code being
called.

So I really don't understand why I'm missing the sensor subdev. Any
ideas how to continue debugging?

Thanks!
Frieder