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SubjectRe: [PATCH RFC v4] media: OF: add "sync-on-green-active" property
Hi Prabhakar,

On 07/16/2013 07:19 PM, Prabhakar Lad wrote:
> From: "Lad, Prabhakar"<prabhakar.csengg@gmail.com>
>
> This patch adds 'sync-on-green-active' property as part
> of endpoint property.
>
> Signed-off-by: Lad, Prabhakar<prabhakar.csengg@gmail.com>
> ---
> Changes for v4:
> 1: Fixed review comments pointed by Sylwester.
>
> Changes for v3:
> 1: Fixed review comments pointed by Laurent and Sylwester.
>
> RFC v2 https://patchwork.kernel.org/patch/2578091/
>
> RFC V1 https://patchwork.kernel.org/patch/2572341/
>
> .../devicetree/bindings/media/video-interfaces.txt | 3 +++
> drivers/media/v4l2-core/v4l2-of.c | 4 ++++
> include/media/v4l2-mediabus.h | 2 ++
> 3 files changed, 9 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/media/video-interfaces.txt b/Documentation/devicetree/bindings/media/video-interfaces.txt
> index e022d2d..5186c7e 100644
> --- a/Documentation/devicetree/bindings/media/video-interfaces.txt
> +++ b/Documentation/devicetree/bindings/media/video-interfaces.txt
> @@ -101,6 +101,9 @@ Optional endpoint properties
> array contains only one entry.
> - clock-noncontinuous: a boolean property to allow MIPI CSI-2 non-continuous
> clock mode.
> +- sync-on-green-active: polarity field when video synchronization is
> + Sync-On-Green. When set the driver determines whether it's a normal operation
> + or inverted operation.

Would you mind adding this entry after pclk-sample property description ?
And how about describing it a bit more precisely and similarly to
VSYNC/HSYNC,
e.g.

- sync-on-green-active: active state of Sync-on-green (SoG) signal,
0/1 for LOW/HIGH respectively.

Otherwise looks good.

> Example
> diff --git a/drivers/media/v4l2-core/v4l2-of.c b/drivers/media/v4l2-core/v4l2-of.c
> index aa59639..5c4c9f0 100644
> --- a/drivers/media/v4l2-core/v4l2-of.c
> +++ b/drivers/media/v4l2-core/v4l2-of.c
> @@ -100,6 +100,10 @@ static void v4l2_of_parse_parallel_bus(const struct device_node *node,
> if (!of_property_read_u32(node, "data-shift",&v))
> bus->data_shift = v;
>
> + if (!of_property_read_u32(node, "sync-on-green-active",&v))
> + flags |= v ? V4L2_MBUS_VIDEO_SOG_ACTIVE_HIGH :
> + V4L2_MBUS_VIDEO_SOG_ACTIVE_LOW;
> +
> bus->flags = flags;
>
> }
> diff --git a/include/media/v4l2-mediabus.h b/include/media/v4l2-mediabus.h
> index 83ae07e..d47eb81 100644
> --- a/include/media/v4l2-mediabus.h
> +++ b/include/media/v4l2-mediabus.h
> @@ -40,6 +40,8 @@
> #define V4L2_MBUS_FIELD_EVEN_HIGH (1<< 10)
> /* FIELD = 1/0 - Field1 (odd)/Field2 (even) */
> #define V4L2_MBUS_FIELD_EVEN_LOW (1<< 11)
> +#define V4L2_MBUS_VIDEO_SOG_ACTIVE_HIGH (1<< 12)
> +#define V4L2_MBUS_VIDEO_SOG_ACTIVE_LOW (1<< 13)
>
> /* Serial flags */
> /* How many lanes the client can use */

Thanks,
Sylwester


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