Capture image from imx219 sensor on i.MX8MM

[Laurent Pinchart]

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 ?

> ~# media-ctl -d /dev/media0 -p
> Media controller API version 6.1.8
> 
> Media device information
> ------------------------
> driver          imx7-csi
> model           imx-media
> serial
> bus info        platform:32e20000.csi
> hw revision     0x0
> driver version  6.1.8
> 
> Device topology
> - entity 1: csi (2 pads, 1 link)
>             type V4L2 subdev subtype Unknown flags 0
>             device node name /dev/v4l-subdev0
>         pad0: Sink
>                 [fmt:UYVY8_2X8/640x480 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:lim-range]
>         pad1: Source
>                 [fmt:UYVY8_2X8/640x480 field:none colorspace:srgb xfer:srgb ycbcr:601 quantization:lim-range]
>                 -> "csi capture":0 [ENABLED,IMMUTABLE]
> 
> - entity 4: csi capture (1 pad, 1 link)
>             type Node subtype V4L flags 0
>             device node name /dev/video0
>         pad0: Sink
>                 <- "csi":1 [ENABLED,IMMUTABLE]

-- 
Regards,

Laurent Pinchart