On Mon, Feb 06, 2023 at 04:38:27PM +0100, Frieder Schrempf wrote: > On 06.02.23 16:31, Laurent Pinchart wrote: > > 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? The issue seems to be with v4l2-async then. There's a debugfs file that lists the missing v4l2-async subdevs (I don't recall the path by heard), that can give useful information. Enabling the debug messages from v4l2-async.c may helpt too. -- Regards, Laurent Pinchart
