diff mbox series

[RESEND,v13,1/3] media: dt-bindings: media: add bindings for Rockchip CIF

Message ID 13deb8c5cb58e08c1b47decd112b51e8e0b6c4dc.1707677804.git.mehdi.djait.k@gmail.com (mailing list archive)
State New
Headers
Series media: rockchip: Add a driver for Rockchip's camera interface |

Commit Message

Mehdi Djait Feb. 11, 2024, 7:03 p.m. UTC 
  From: Mehdi Djait <mehdi.djait@bootlin.com>

Add a documentation for the Rockchip Camera Interface binding.

Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Michael Riesch <michael.riesch@wolfvision.net>
Signed-off-by: Mehdi Djait <mehdi.djait@bootlin.com>
Signed-off-by: Mehdi Djait <mehdi.djait.k@gmail.com>
---
 .../bindings/media/rockchip,px30-vip.yaml     | 123 ++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml

Comments

Sakari Ailus Feb. 13, 2024, 12:04 p.m. UTC | #1 
Hi Mehdi,

Thanks for the patchset.

On Sun, Feb 11, 2024 at 08:03:30PM +0100, Mehdi Djait wrote:
> From: Mehdi Djait <mehdi.djait@bootlin.com>
> 
> Add a documentation for the Rockchip Camera Interface binding.
> 
> Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
> Reviewed-by: Michael Riesch <michael.riesch@wolfvision.net>
> Signed-off-by: Mehdi Djait <mehdi.djait@bootlin.com>
> Signed-off-by: Mehdi Djait <mehdi.djait.k@gmail.com>
> ---
>  .../bindings/media/rockchip,px30-vip.yaml     | 123 ++++++++++++++++++
>  1 file changed, 123 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> 
> diff --git a/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml b/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> new file mode 100644
> index 000000000000..6af4a9b6774a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> @@ -0,0 +1,123 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/rockchip,px30-vip.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Rockchip Camera Interface (CIF)
> +
> +maintainers:
> +  - Mehdi Djait <mehdi.djait@bootlin.com>
> +
> +description:
> +  CIF is a camera interface present on some Rockchip SoCs. It receives the data
> +  from Camera sensor or CCIR656 encoder and transfers it into system main memory
> +  by AXI bus.
> +
> +properties:
> +  compatible:
> +    const: rockchip,px30-vip
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: ACLK
> +      - description: HCLK
> +      - description: PCLK
> +
> +  clock-names:
> +    items:
> +      - const: aclk
> +      - const: hclk
> +      - const: pclk
> +
> +  resets:
> +    items:
> +      - description: AXI
> +      - description: AHB
> +      - description: PCLK IN
> +
> +  reset-names:
> +    items:
> +      - const: axi
> +      - const: ahb
> +      - const: pclkin
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  ports:
> +    $ref: /schemas/graph.yaml#/properties/ports
> +
> +    properties:
> +      port@0:
> +        $ref: /schemas/graph.yaml#/$defs/port-base
> +        unevaluatedProperties: false
> +        description: input port on the parallel interface
> +
> +        properties:
> +          endpoint:
> +            $ref: video-interfaces.yaml#
> +            unevaluatedProperties: false
> +
> +            properties:
> +              bus-type:
> +                enum: [5, 6]
> +
> +            required:
> +              - bus-type

What about the vsync-active, hsync-active and data-active properties?
Aren't they relevant for this device? Are there default values? This should
be part of the bindings for the device, shouldn't it?

> +
> +    required:
> +      - port@0
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - ports
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/px30-cru.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/media/video-interfaces.h>
> +    #include <dt-bindings/power/px30-power.h>
> +
> +    parent {
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +
> +        video-capture@ff490000 {
> +            compatible = "rockchip,px30-vip";
> +            reg = <0x0 0xff490000 0x0 0x200>;
> +            interrupts = <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
> +            clocks = <&cru ACLK_CIF>, <&cru HCLK_CIF>, <&cru PCLK_CIF>;
> +            clock-names = "aclk", "hclk", "pclk";
> +            power-domains = <&power PX30_PD_VI>;
> +            resets = <&cru SRST_CIF_A>, <&cru SRST_CIF_H>, <&cru SRST_CIF_PCLKIN>;
> +            reset-names = "axi", "ahb", "pclkin";
> +
> +            ports {
> +                #address-cells = <1>;
> +                #size-cells = <0>;
> +
> +                port@0 {
> +                    reg = <0>;
> +
> +                    cif_in: endpoint {
> +                        remote-endpoint = <&tw9900_out>;
> +                        bus-type = <MEDIA_BUS_TYPE_BT656>;
> +                    };
> +                };
> +            };
> +        };
> +    };
> +...
Mehdi Djait Feb. 20, 2024, 5:04 p.m. UTC | #2 
Hi Sakari,

Thank you for the review.

On Tue, Feb 13, 2024 at 12:04:58PM +0000, Sakari Ailus wrote:
> Hi Mehdi,
> 
> Thanks for the patchset.
> 
> On Sun, Feb 11, 2024 at 08:03:30PM +0100, Mehdi Djait wrote:
> > From: Mehdi Djait <mehdi.djait@bootlin.com>
> > 
> > Add a documentation for the Rockchip Camera Interface binding.
> > 
> > Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
> > Reviewed-by: Michael Riesch <michael.riesch@wolfvision.net>
> > Signed-off-by: Mehdi Djait <mehdi.djait@bootlin.com>
> > Signed-off-by: Mehdi Djait <mehdi.djait.k@gmail.com>
> > ---
> >  .../bindings/media/rockchip,px30-vip.yaml     | 123 ++++++++++++++++++
> >  1 file changed, 123 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml b/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> > new file mode 100644
> > index 000000000000..6af4a9b6774a
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> > @@ -0,0 +1,123 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/media/rockchip,px30-vip.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Rockchip Camera Interface (CIF)
> > +
> > +maintainers:
> > +  - Mehdi Djait <mehdi.djait@bootlin.com>
> > +
> > +description:
> > +  CIF is a camera interface present on some Rockchip SoCs. It receives the data
> > +  from Camera sensor or CCIR656 encoder and transfers it into system main memory
> > +  by AXI bus.
> > +
> > +properties:
> > +  compatible:
> > +    const: rockchip,px30-vip
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    items:
> > +      - description: ACLK
> > +      - description: HCLK
> > +      - description: PCLK
> > +
> > +  clock-names:
> > +    items:
> > +      - const: aclk
> > +      - const: hclk
> > +      - const: pclk
> > +
> > +  resets:
> > +    items:
> > +      - description: AXI
> > +      - description: AHB
> > +      - description: PCLK IN
> > +
> > +  reset-names:
> > +    items:
> > +      - const: axi
> > +      - const: ahb
> > +      - const: pclkin
> > +
> > +  power-domains:
> > +    maxItems: 1
> > +
> > +  ports:
> > +    $ref: /schemas/graph.yaml#/properties/ports
> > +
> > +    properties:
> > +      port@0:
> > +        $ref: /schemas/graph.yaml#/$defs/port-base
> > +        unevaluatedProperties: false
> > +        description: input port on the parallel interface
> > +
> > +        properties:
> > +          endpoint:
> > +            $ref: video-interfaces.yaml#
> > +            unevaluatedProperties: false
> > +
> > +            properties:
> > +              bus-type:
> > +                enum: [5, 6]
> > +
> > +            required:
> > +              - bus-type
> 
> What about the vsync-active, hsync-active and data-active properties?
> Aren't they relevant for this device? Are there default values? This should
> be part of the bindings for the device, shouldn't it?
> 

From what I gathered from the Rockchip PX30 TRM and the other
available documents from Rockchip, I will add the following:

diff --git a/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml b/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
index 6af4a9b6774a..6920b0cb0507 100644
--- a/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
+++ b/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
@@ -69,6 +69,14 @@ properties:
               bus-type:
                 enum: [5, 6]
 
+              hsync-active:
+                enum: [0, 1]
+                default: 1
+
+              vsync-active:
+                enum: [0, 1]
+                default: 0
+

@dt-maintainers, @Conor does this warrant a drop of the reviewed-by tags
in the V14 ?

--
Kind Regards
Mehdi Djait
Sakari Ailus Feb. 20, 2024, 7:30 p.m. UTC | #3 
Hi Mehdi,

On Tue, Feb 20, 2024 at 06:04:10PM +0100, Mehdi Djait wrote:
> Hi Sakari,
> 
> Thank you for the review.

You're welcome!

> 
> On Tue, Feb 13, 2024 at 12:04:58PM +0000, Sakari Ailus wrote:
> > Hi Mehdi,
> > 
> > Thanks for the patchset.
> > 
> > On Sun, Feb 11, 2024 at 08:03:30PM +0100, Mehdi Djait wrote:
> > > From: Mehdi Djait <mehdi.djait@bootlin.com>
> > > 
> > > Add a documentation for the Rockchip Camera Interface binding.
> > > 
> > > Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
> > > Reviewed-by: Michael Riesch <michael.riesch@wolfvision.net>
> > > Signed-off-by: Mehdi Djait <mehdi.djait@bootlin.com>
> > > Signed-off-by: Mehdi Djait <mehdi.djait.k@gmail.com>
> > > ---
> > >  .../bindings/media/rockchip,px30-vip.yaml     | 123 ++++++++++++++++++
> > >  1 file changed, 123 insertions(+)
> > >  create mode 100644 Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> > > 
> > > diff --git a/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml b/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> > > new file mode 100644
> > > index 000000000000..6af4a9b6774a
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> > > @@ -0,0 +1,123 @@
> > > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > > +%YAML 1.2
> > > +---
> > > +$id: http://devicetree.org/schemas/media/rockchip,px30-vip.yaml#
> > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > +
> > > +title: Rockchip Camera Interface (CIF)
> > > +
> > > +maintainers:
> > > +  - Mehdi Djait <mehdi.djait@bootlin.com>
> > > +
> > > +description:
> > > +  CIF is a camera interface present on some Rockchip SoCs. It receives the data
> > > +  from Camera sensor or CCIR656 encoder and transfers it into system main memory
> > > +  by AXI bus.
> > > +
> > > +properties:
> > > +  compatible:
> > > +    const: rockchip,px30-vip
> > > +
> > > +  reg:
> > > +    maxItems: 1
> > > +
> > > +  interrupts:
> > > +    maxItems: 1
> > > +
> > > +  clocks:
> > > +    items:
> > > +      - description: ACLK
> > > +      - description: HCLK
> > > +      - description: PCLK
> > > +
> > > +  clock-names:
> > > +    items:
> > > +      - const: aclk
> > > +      - const: hclk
> > > +      - const: pclk
> > > +
> > > +  resets:
> > > +    items:
> > > +      - description: AXI
> > > +      - description: AHB
> > > +      - description: PCLK IN
> > > +
> > > +  reset-names:
> > > +    items:
> > > +      - const: axi
> > > +      - const: ahb
> > > +      - const: pclkin
> > > +
> > > +  power-domains:
> > > +    maxItems: 1
> > > +
> > > +  ports:
> > > +    $ref: /schemas/graph.yaml#/properties/ports
> > > +
> > > +    properties:
> > > +      port@0:
> > > +        $ref: /schemas/graph.yaml#/$defs/port-base
> > > +        unevaluatedProperties: false
> > > +        description: input port on the parallel interface
> > > +
> > > +        properties:
> > > +          endpoint:
> > > +            $ref: video-interfaces.yaml#
> > > +            unevaluatedProperties: false
> > > +
> > > +            properties:
> > > +              bus-type:
> > > +                enum: [5, 6]
> > > +
> > > +            required:
> > > +              - bus-type
> > 
> > What about the vsync-active, hsync-active and data-active properties?
> > Aren't they relevant for this device? Are there default values? This should
> > be part of the bindings for the device, shouldn't it?
> > 
> 
> From what I gathered from the Rockchip PX30 TRM and the other
> available documents from Rockchip, I will add the following:
> 
> diff --git a/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml b/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> index 6af4a9b6774a..6920b0cb0507 100644
> --- a/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> +++ b/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> @@ -69,6 +69,14 @@ properties:
>                bus-type:
>                  enum: [5, 6]
>  
> +              hsync-active:
> +                enum: [0, 1]
> +                default: 1
> +
> +              vsync-active:
> +                enum: [0, 1]
> +                default: 0

I'd use the same default for both, whether it's 0 or 1.

> +
> 
> @dt-maintainers, @Conor does this warrant a drop of the reviewed-by tags
> in the V14 ?
>
Mehdi Djait Feb. 20, 2024, 8:48 p.m. UTC | #4 
Hi Sakari,

On Tue, Feb 20, 2024 at 07:30:53PM +0000, Sakari Ailus wrote:
> Hi Mehdi,
> 
> On Tue, Feb 20, 2024 at 06:04:10PM +0100, Mehdi Djait wrote:
> > Hi Sakari,
> > 
> > Thank you for the review.
> 
> You're welcome!
> 
> > 
> > On Tue, Feb 13, 2024 at 12:04:58PM +0000, Sakari Ailus wrote:
> > > Hi Mehdi,
> > > 
> > > Thanks for the patchset.
> > > 
> > > On Sun, Feb 11, 2024 at 08:03:30PM +0100, Mehdi Djait wrote:
> > > > From: Mehdi Djait <mehdi.djait@bootlin.com>
> > > > 
> > > > Add a documentation for the Rockchip Camera Interface binding.
> > > > 
> > > > Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
> > > > Reviewed-by: Michael Riesch <michael.riesch@wolfvision.net>
> > > > Signed-off-by: Mehdi Djait <mehdi.djait@bootlin.com>
> > > > Signed-off-by: Mehdi Djait <mehdi.djait.k@gmail.com>
> > > > ---
> > > >  .../bindings/media/rockchip,px30-vip.yaml     | 123 ++++++++++++++++++
> > > >  1 file changed, 123 insertions(+)
> > > >  create mode 100644 Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> > > > 
> > > > diff --git a/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml b/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> > > > new file mode 100644
> > > > index 000000000000..6af4a9b6774a
> > > > --- /dev/null
> > > > +++ b/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> > > > @@ -0,0 +1,123 @@
> > > > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > > > +%YAML 1.2
> > > > +---
> > > > +$id: http://devicetree.org/schemas/media/rockchip,px30-vip.yaml#
> > > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > > +
> > > > +title: Rockchip Camera Interface (CIF)
> > > > +
> > > > +maintainers:
> > > > +  - Mehdi Djait <mehdi.djait@bootlin.com>
> > > > +
> > > > +description:
> > > > +  CIF is a camera interface present on some Rockchip SoCs. It receives the data
> > > > +  from Camera sensor or CCIR656 encoder and transfers it into system main memory
> > > > +  by AXI bus.
> > > > +
> > > > +properties:
> > > > +  compatible:
> > > > +    const: rockchip,px30-vip
> > > > +
> > > > +  reg:
> > > > +    maxItems: 1
> > > > +
> > > > +  interrupts:
> > > > +    maxItems: 1
> > > > +
> > > > +  clocks:
> > > > +    items:
> > > > +      - description: ACLK
> > > > +      - description: HCLK
> > > > +      - description: PCLK
> > > > +
> > > > +  clock-names:
> > > > +    items:
> > > > +      - const: aclk
> > > > +      - const: hclk
> > > > +      - const: pclk
> > > > +
> > > > +  resets:
> > > > +    items:
> > > > +      - description: AXI
> > > > +      - description: AHB
> > > > +      - description: PCLK IN
> > > > +
> > > > +  reset-names:
> > > > +    items:
> > > > +      - const: axi
> > > > +      - const: ahb
> > > > +      - const: pclkin
> > > > +
> > > > +  power-domains:
> > > > +    maxItems: 1
> > > > +
> > > > +  ports:
> > > > +    $ref: /schemas/graph.yaml#/properties/ports
> > > > +
> > > > +    properties:
> > > > +      port@0:
> > > > +        $ref: /schemas/graph.yaml#/$defs/port-base
> > > > +        unevaluatedProperties: false
> > > > +        description: input port on the parallel interface
> > > > +
> > > > +        properties:
> > > > +          endpoint:
> > > > +            $ref: video-interfaces.yaml#
> > > > +            unevaluatedProperties: false
> > > > +
> > > > +            properties:
> > > > +              bus-type:
> > > > +                enum: [5, 6]
> > > > +
> > > > +            required:
> > > > +              - bus-type
> > > 
> > > What about the vsync-active, hsync-active and data-active properties?
> > > Aren't they relevant for this device? Are there default values? This should
> > > be part of the bindings for the device, shouldn't it?
> > > 
> > 
> > From what I gathered from the Rockchip PX30 TRM and the other
> > available documents from Rockchip, I will add the following:
> > 
> > diff --git a/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml b/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> > index 6af4a9b6774a..6920b0cb0507 100644
> > --- a/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> > +++ b/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> > @@ -69,6 +69,14 @@ properties:
> >                bus-type:
> >                  enum: [5, 6]
> >  
> > +              hsync-active:
> > +                enum: [0, 1]
> > +                default: 1
> > +
> > +              vsync-active:
> > +                enum: [0, 1]
> > +                default: 0
> 
> I'd use the same default for both, whether it's 0 or 1.
> 

Is this supposed to be the default value HIGH or LOW if it is not
configured by the driver ? because the manual states the following:

HREF_POL
Href input polarity:
1'b0 : high active
1'b1 : low active
RESET VALUE: 0x0

VSYNC_POL
Vsync input polarity:
1'b0 : low active
1'b1 : high active
RESET VALUE: 0x0

And that's why I chose 1 for hsync and 0 for vsync

--
Kind Regards
Mehdi Djait
Sakari Ailus Feb. 21, 2024, 10:57 a.m. UTC | #5 
Hi Mehdi,

On Tue, Feb 20, 2024 at 09:48:06PM +0100, Mehdi Djait wrote:
> Hi Sakari,
> 
> On Tue, Feb 20, 2024 at 07:30:53PM +0000, Sakari Ailus wrote:
> > Hi Mehdi,
> > 
> > On Tue, Feb 20, 2024 at 06:04:10PM +0100, Mehdi Djait wrote:
> > > Hi Sakari,
> > > 
> > > Thank you for the review.
> > 
> > You're welcome!
> > 
> > > 
> > > On Tue, Feb 13, 2024 at 12:04:58PM +0000, Sakari Ailus wrote:
> > > > Hi Mehdi,
> > > > 
> > > > Thanks for the patchset.
> > > > 
> > > > On Sun, Feb 11, 2024 at 08:03:30PM +0100, Mehdi Djait wrote:
> > > > > From: Mehdi Djait <mehdi.djait@bootlin.com>
> > > > > 
> > > > > Add a documentation for the Rockchip Camera Interface binding.
> > > > > 
> > > > > Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
> > > > > Reviewed-by: Michael Riesch <michael.riesch@wolfvision.net>
> > > > > Signed-off-by: Mehdi Djait <mehdi.djait@bootlin.com>
> > > > > Signed-off-by: Mehdi Djait <mehdi.djait.k@gmail.com>
> > > > > ---
> > > > >  .../bindings/media/rockchip,px30-vip.yaml     | 123 ++++++++++++++++++
> > > > >  1 file changed, 123 insertions(+)
> > > > >  create mode 100644 Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> > > > > 
> > > > > diff --git a/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml b/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> > > > > new file mode 100644
> > > > > index 000000000000..6af4a9b6774a
> > > > > --- /dev/null
> > > > > +++ b/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> > > > > @@ -0,0 +1,123 @@
> > > > > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > > > > +%YAML 1.2
> > > > > +---
> > > > > +$id: http://devicetree.org/schemas/media/rockchip,px30-vip.yaml#
> > > > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > > > +
> > > > > +title: Rockchip Camera Interface (CIF)
> > > > > +
> > > > > +maintainers:
> > > > > +  - Mehdi Djait <mehdi.djait@bootlin.com>
> > > > > +
> > > > > +description:
> > > > > +  CIF is a camera interface present on some Rockchip SoCs. It receives the data
> > > > > +  from Camera sensor or CCIR656 encoder and transfers it into system main memory
> > > > > +  by AXI bus.
> > > > > +
> > > > > +properties:
> > > > > +  compatible:
> > > > > +    const: rockchip,px30-vip
> > > > > +
> > > > > +  reg:
> > > > > +    maxItems: 1
> > > > > +
> > > > > +  interrupts:
> > > > > +    maxItems: 1
> > > > > +
> > > > > +  clocks:
> > > > > +    items:
> > > > > +      - description: ACLK
> > > > > +      - description: HCLK
> > > > > +      - description: PCLK
> > > > > +
> > > > > +  clock-names:
> > > > > +    items:
> > > > > +      - const: aclk
> > > > > +      - const: hclk
> > > > > +      - const: pclk
> > > > > +
> > > > > +  resets:
> > > > > +    items:
> > > > > +      - description: AXI
> > > > > +      - description: AHB
> > > > > +      - description: PCLK IN
> > > > > +
> > > > > +  reset-names:
> > > > > +    items:
> > > > > +      - const: axi
> > > > > +      - const: ahb
> > > > > +      - const: pclkin
> > > > > +
> > > > > +  power-domains:
> > > > > +    maxItems: 1
> > > > > +
> > > > > +  ports:
> > > > > +    $ref: /schemas/graph.yaml#/properties/ports
> > > > > +
> > > > > +    properties:
> > > > > +      port@0:
> > > > > +        $ref: /schemas/graph.yaml#/$defs/port-base
> > > > > +        unevaluatedProperties: false
> > > > > +        description: input port on the parallel interface
> > > > > +
> > > > > +        properties:
> > > > > +          endpoint:
> > > > > +            $ref: video-interfaces.yaml#
> > > > > +            unevaluatedProperties: false
> > > > > +
> > > > > +            properties:
> > > > > +              bus-type:
> > > > > +                enum: [5, 6]
> > > > > +
> > > > > +            required:
> > > > > +              - bus-type
> > > > 
> > > > What about the vsync-active, hsync-active and data-active properties?
> > > > Aren't they relevant for this device? Are there default values? This should
> > > > be part of the bindings for the device, shouldn't it?
> > > > 
> > > 
> > > From what I gathered from the Rockchip PX30 TRM and the other
> > > available documents from Rockchip, I will add the following:
> > > 
> > > diff --git a/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml b/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> > > index 6af4a9b6774a..6920b0cb0507 100644
> > > --- a/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> > > +++ b/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
> > > @@ -69,6 +69,14 @@ properties:
> > >                bus-type:
> > >                  enum: [5, 6]
> > >  
> > > +              hsync-active:
> > > +                enum: [0, 1]
> > > +                default: 1
> > > +
> > > +              vsync-active:
> > > +                enum: [0, 1]
> > > +                default: 0
> > 
> > I'd use the same default for both, whether it's 0 or 1.
> > 
> 
> Is this supposed to be the default value HIGH or LOW if it is not
> configured by the driver ? because the manual states the following:
> 
> HREF_POL
> Href input polarity:
> 1'b0 : high active
> 1'b1 : low active
> RESET VALUE: 0x0
> 
> VSYNC_POL
> Vsync input polarity:
> 1'b0 : low active
> 1'b1 : high active
> RESET VALUE: 0x0
> 
> And that's why I chose 1 for hsync and 0 for vsync

The hardware reset values do not have to reflect defaults in DT bindings.
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml b/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
new file mode 100644
index 000000000000..6af4a9b6774a
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/rockchip,px30-vip.yaml
@@ -0,0 +1,123 @@ 
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/rockchip,px30-vip.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip Camera Interface (CIF)
+
+maintainers:
+  - Mehdi Djait <mehdi.djait@bootlin.com>
+
+description:
+  CIF is a camera interface present on some Rockchip SoCs. It receives the data
+  from Camera sensor or CCIR656 encoder and transfers it into system main memory
+  by AXI bus.
+
+properties:
+  compatible:
+    const: rockchip,px30-vip
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: ACLK
+      - description: HCLK
+      - description: PCLK
+
+  clock-names:
+    items:
+      - const: aclk
+      - const: hclk
+      - const: pclk
+
+  resets:
+    items:
+      - description: AXI
+      - description: AHB
+      - description: PCLK IN
+
+  reset-names:
+    items:
+      - const: axi
+      - const: ahb
+      - const: pclkin
+
+  power-domains:
+    maxItems: 1
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port@0:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description: input port on the parallel interface
+
+        properties:
+          endpoint:
+            $ref: video-interfaces.yaml#
+            unevaluatedProperties: false
+
+            properties:
+              bus-type:
+                enum: [5, 6]
+
+            required:
+              - bus-type
+
+    required:
+      - port@0
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - ports
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/px30-cru.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/media/video-interfaces.h>
+    #include <dt-bindings/power/px30-power.h>
+
+    parent {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        video-capture@ff490000 {
+            compatible = "rockchip,px30-vip";
+            reg = <0x0 0xff490000 0x0 0x200>;
+            interrupts = <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
+            clocks = <&cru ACLK_CIF>, <&cru HCLK_CIF>, <&cru PCLK_CIF>;
+            clock-names = "aclk", "hclk", "pclk";
+            power-domains = <&power PX30_PD_VI>;
+            resets = <&cru SRST_CIF_A>, <&cru SRST_CIF_H>, <&cru SRST_CIF_PCLKIN>;
+            reset-names = "axi", "ahb", "pclkin";
+
+            ports {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                port@0 {
+                    reg = <0>;
+
+                    cif_in: endpoint {
+                        remote-endpoint = <&tw9900_out>;
+                        bus-type = <MEDIA_BUS_TYPE_BT656>;
+                    };
+                };
+            };
+        };
+    };
+...