Re: [RFC 1/3] media: tw9910: Allow to probe from device tree

[Fabio Estevam <festevam@gmail.com>]

Hi Jacopo,

On Mon, Sep 13, 2021 at 5:58 AM Jacopo Mondi <jacopo@jmondi.org> wrote:

> There's an
>
>         tw9910_s_power(&priv->subdev, 0);
>
> at the end of the video_probe() function.
>
> The driver handles power management with the legacy s_power() call
> chain, and the receiver driver needs to v4l2_pipeline_pm_get() which
> the imx driver does when the capture node is open.
>
> Just an hint, you might have noticed already

Thanks for your comments and review. Yes, I have fixed the I2C errors.

I plan to re-submit the entire series after I get the TW9990 to work
on my imx6sx-based board.

The capture driver is drivers/staging/media/imx/imx7-media-csi.c.

Currently, I am not able to get the stream to start.

This is the configuration I am using:

media-ctl -l "'tw9910 2-0044':0 -> 'csi':0[1]"
media-ctl -l "'csi':1 -> 'csi capture':0[1]"
media-ctl -v -V "'tw9910 2-0044':0 [fmt:UYVY8_2X8/720x480 field:any]"
Opening media device /dev/media0
Enumerating entities
Found 3 entities
Enumerating pads and links
Setting up format UYVY8_2X8 720x480 on pad tw9910 2-0044/0
Format set: UYVY8_2X8 720x480
Setting up format UYVY8_2X8 720x480 on pad csi/0
Format set: UYVY8_2X8 720x480

Then I launch the capture stream command:

v4l2-ctl --stream-mmap -d /dev/video1

but nothing happens here, no >>>>> frame indication progress is shown.

If I hit CTRL + C then I get:
[  715.467623] csi: wait last EOF timeout

Any suggestions?

Thanks