LinuxTV Patchwork [v4,1/4] dt-bindings: adv748x: make data-lanes property mandatory for CSI-2 endpoints

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Submitter Niklas Söderlund
Date Nov. 29, 2018, 2:01 a.m.
Message ID <20181129020147.22115-2-niklas.soderlund+renesas@ragnatech.se>
Download mbox | patch
Permalink /patch/53198/
State New
Delegated to: Hans Verkuil
Headers show

Comments

Niklas Söderlund - Nov. 29, 2018, 2:01 a.m.
The CSI-2 transmitters can use a different number of lanes to transmit
data. Make the data-lanes mandatory for the endpoints that describe the
transmitters as no good default can be set to fallback on.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>

---
* Changes since v3
- Add paragraph to describe the accepted values for the source endpoint
  data-lane property. Thanks Jacopo for pointing this out and sorry for
  missing this in v2.
* Changes since v2
- Update paragraph according to Laurents comments.
---
 .../devicetree/bindings/media/i2c/adv748x.txt         | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)
Laurent Pinchart - Nov. 29, 2018, 6:58 p.m.
Hi Niklas,

Thank you for the patch.

On Thursday, 29 November 2018 04:01:44 EET Niklas Söderlund wrote:
> The CSI-2 transmitters can use a different number of lanes to transmit
> data. Make the data-lanes mandatory for the endpoints that describe the
> transmitters as no good default can be set to fallback on.
> 
> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
> * Changes since v3
> - Add paragraph to describe the accepted values for the source endpoint
>   data-lane property. Thanks Jacopo for pointing this out and sorry for
>   missing this in v2.
> * Changes since v2
> - Update paragraph according to Laurents comments.
> ---
>  .../devicetree/bindings/media/i2c/adv748x.txt         | 11 ++++++++++-
>  1 file changed, 10 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/media/i2c/adv748x.txt
> b/Documentation/devicetree/bindings/media/i2c/adv748x.txt index
> 5dddc95f9cc46084..4f91686e54a6b939 100644
> --- a/Documentation/devicetree/bindings/media/i2c/adv748x.txt
> +++ b/Documentation/devicetree/bindings/media/i2c/adv748x.txt
> @@ -48,7 +48,16 @@ are numbered as follows.
>  	  TXA		source		10
>  	  TXB		source		11
> 
> -The digital output port nodes must contain at least one endpoint.
> +The digital output port nodes, when present, shall contain at least one
> +endpoint. Each of those endpoints shall contain the data-lanes property as
> +described in video-interfaces.txt.
> +
> +Required source endpoint properties:
> +  - data-lanes: an array of physical data lane indexes
> +    The accepted value(s) for this property depends on which of the two
> +    sources are described. For TXA 1, 2 or 4 data lanes can be described
> +    while for TXB only 1 data lane is valid. See video-interfaces.txt
> +    for detailed description.
> 
>  Ports are optional if they are not connected to anything at the hardware
> level.
Rob Herring - Dec. 7, 2018, 11:08 p.m.
On Thu, 29 Nov 2018 03:01:44 +0100, =?UTF-8?q?Niklas=20S=C3=B6derlund?=          wrote:
> The CSI-2 transmitters can use a different number of lanes to transmit
> data. Make the data-lanes mandatory for the endpoints that describe the
> transmitters as no good default can be set to fallback on.
> 
> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
> 
> ---
> * Changes since v3
> - Add paragraph to describe the accepted values for the source endpoint
>   data-lane property. Thanks Jacopo for pointing this out and sorry for
>   missing this in v2.
> * Changes since v2
> - Update paragraph according to Laurents comments.
> ---
>  .../devicetree/bindings/media/i2c/adv748x.txt         | 11 ++++++++++-
>  1 file changed, 10 insertions(+), 1 deletion(-)
> 

Reviewed-by: Rob Herring <robh@kernel.org>

Patch

diff --git a/Documentation/devicetree/bindings/media/i2c/adv748x.txt b/Documentation/devicetree/bindings/media/i2c/adv748x.txt
index 5dddc95f9cc46084..4f91686e54a6b939 100644
--- a/Documentation/devicetree/bindings/media/i2c/adv748x.txt
+++ b/Documentation/devicetree/bindings/media/i2c/adv748x.txt
@@ -48,7 +48,16 @@  are numbered as follows.
 	  TXA		source		10
 	  TXB		source		11
 
-The digital output port nodes must contain at least one endpoint.
+The digital output port nodes, when present, shall contain at least one
+endpoint. Each of those endpoints shall contain the data-lanes property as
+described in video-interfaces.txt.
+
+Required source endpoint properties:
+  - data-lanes: an array of physical data lane indexes
+    The accepted value(s) for this property depends on which of the two
+    sources are described. For TXA 1, 2 or 4 data lanes can be described
+    while for TXB only 1 data lane is valid. See video-interfaces.txt
+    for detailed description.
 
 Ports are optional if they are not connected to anything at the hardware level.
 

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