RE: [PATCH v2 2/2] media: dt-bindings: media: i2c: Add bindings for ADDI9036
From: Togorean, Bogdan
Date: Thu Oct 08 2020 - 02:42:28 EST
Hi Sakari,
> Hi Bogdan,
>
> On Thu, Oct 08, 2020 at 06:23:33AM +0000, Togorean, Bogdan wrote:
> > Thank you Rob for review
> > > On Fri, Oct 02, 2020 at 04:35:17PM +0300, Bogdan Togorean wrote:
> > > > Add YAML device tree bindings for Analog Devices Inc. ADDI9036 CCD TOF
> > > > front-end.
> > > >
> > > > Signed-off-by: Bogdan Togorean <bogdan.togorean@xxxxxxxxxx>
> > > > ---
> > > > v2: added reg property description
> > > > ---
> > > > .../bindings/media/i2c/adi,addi9036.yaml | 76 +++++++++++++++++++
> > > > 1 file changed, 76 insertions(+)
> > > > create mode 100644
> > > Documentation/devicetree/bindings/media/i2c/adi,addi9036.yaml
> > > >
> > > > diff --git
> a/Documentation/devicetree/bindings/media/i2c/adi,addi9036.yaml
> > > b/Documentation/devicetree/bindings/media/i2c/adi,addi9036.yaml
> > > > new file mode 100644
> > > > index 000000000000..7c4af704db98
> > > > --- /dev/null
> > > > +++ b/Documentation/devicetree/bindings/media/i2c/adi,addi9036.yaml
> > > > @@ -0,0 +1,76 @@
> > > > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > > > +%YAML 1.2
> > > > +---
> > > > +$id:
> > >
> https://urldefense.com/v3/__http://devicetree.org/schemas/media/i2c/adi,add
> > >
> i9036.yaml*__;Iw!!A3Ni8CS0y2Y!vLJoRikiVhmxm8p3bhGjRkFIWgjXvVlcJ8ATa9okn
> > > JqDbtobtK46hHICblE2i2Yj2sZL$
> > > > +$schema: https://urldefense.com/v3/__http://devicetree.org/meta-
> > >
> schemas/core.yaml*__;Iw!!A3Ni8CS0y2Y!vLJoRikiVhmxm8p3bhGjRkFIWgjXvVlcJ
> > > 8ATa9oknJqDbtobtK46hHICblE2iz34fu4o$
> > > > +
> > > > +title: Analog Devices ADDI9036 VGA CCD Time of Flight Sensor
> > > > +
> > > > +maintainers:
> > > > + - Bogdan Togorean <bogdan.togorean@xxxxxxxxxx>
> > > > +
> > > > +description: |-
> > > > + The ADDI9036 is a complete, 45 MHz, front-end solution for charge
> coupled
> > > > + device (CCD) time of flight (TOF) imaging applications. It is programmable
> > > > + through I2C interface. Image data is sent through MIPI CSI-2 2 lanes and
> > > > + can output two RAW12 packed data streams. One is IR and the other is
> > > Depth.
> > > > + Each data stream is on a separate or same MIPI Virtual Channel,
> depending
> > > > + on configuration and each have 640x480 resolution.
> > > > +
> > > > +properties:
> > > > + compatible:
> > > > + const: adi,addi9036
> > > > +
> > > > + reg:
> > > > + description: I2C device address
> > >
> > > Can drop this.
> > ACK
> > >
> > > > + maxItems: 1
> > > > +
> > > > + reset-gpios:
> > >
> > > maxItems: 1
> > ACK
> > >
> > > > + description: |-
> > > > + Reference to the GPIO connected to the RST/SYNC pin, if any.
> > > > + Must be released (set high) after all supplies are applied.
> > > > +
> > > > + # See ../video-interfaces.txt for more details
> > > > + port:
> > > > + type: object
> > > > + properties:
> > > > + endpoint:
> > > > + type: object
> > > > + properties:
> > > > + data-lanes:
> > > > + description: |-
> > > > + The sensor supports two-lane operation.
> > > > + For two-lane operation the property must be set to <1 2>.
> > > > + items:
> > > > + - const: 1
> > > > + - const: 2
> > >
> > > If this is the only possible setting, then why does it need to be in DT?
> > If this is not set the bus_type will be not be correctly set after call of
> > v4l2_fwnode_endpoint_parse.
>
> That's not a DT binding issue. The driver needs to set the field before
> calling v4l2_fwnode_endpoint_parse.
>
> Does the device not support one lane operation?
>
Now I was reading your response to driver review and understood the problem.
Sorry for this an I'll set the bus_type in driver before call of v4l2_fwnode_endpoint_parse.
And the camera does not support one lane.
> --
> Regards,
>
> Sakari Ailus