Re: [PATCH/RFC 1/2] v4l2: Add the parallel bus HREF signal polarity flags

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Hi Sylwester,

On Friday 16 September 2011 19:28:42 Sylwester Nawrocki wrote:
> HREF is a signal indicating valid data during single line transmission.
> Add corresponding flags for this signal to the set of mediabus signal
> polarity flags.

So that's a data valid signal that gates the pixel data ? The OMAP3 ISP has a 
similar signal called WEN, and I've seen other chips using DVAL. Your patch 
looks good to me, except maybe for the signal name that could be made a bit 
more explicit (I'm not sure what most chips use though).

> Signed-off-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
> Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
> ---
>  include/media/v4l2-mediabus.h |   14 ++++++++------
>  1 files changed, 8 insertions(+), 6 deletions(-)
> 
> diff --git a/include/media/v4l2-mediabus.h b/include/media/v4l2-mediabus.h
> index 6114007..41d8771 100644
> --- a/include/media/v4l2-mediabus.h
> +++ b/include/media/v4l2-mediabus.h
> @@ -26,12 +26,14 @@
>  /* Note: in BT.656 mode HSYNC and VSYNC are unused */
>  #define V4L2_MBUS_HSYNC_ACTIVE_HIGH		(1 << 2)
>  #define V4L2_MBUS_HSYNC_ACTIVE_LOW		(1 << 3)
> -#define V4L2_MBUS_VSYNC_ACTIVE_HIGH		(1 << 4)
> -#define V4L2_MBUS_VSYNC_ACTIVE_LOW		(1 << 5)
> -#define V4L2_MBUS_PCLK_SAMPLE_RISING		(1 << 6)
> -#define V4L2_MBUS_PCLK_SAMPLE_FALLING		(1 << 7)
> -#define V4L2_MBUS_DATA_ACTIVE_HIGH		(1 << 8)
> -#define V4L2_MBUS_DATA_ACTIVE_LOW		(1 << 9)
> +#define V4L2_MBUS_HREF_ACTIVE_HIGH		(1 << 4)
> +#define V4L2_MBUS_HREF_ACTIVE_LOW		(1 << 5)
> +#define V4L2_MBUS_VSYNC_ACTIVE_HIGH		(1 << 6)
> +#define V4L2_MBUS_VSYNC_ACTIVE_LOW		(1 << 7)
> +#define V4L2_MBUS_PCLK_SAMPLE_RISING		(1 << 8)
> +#define V4L2_MBUS_PCLK_SAMPLE_FALLING		(1 << 9)
> +#define V4L2_MBUS_DATA_ACTIVE_HIGH		(1 << 10)
> +#define V4L2_MBUS_DATA_ACTIVE_LOW		(1 << 11)
> 
>  /* Serial flags */
>  /* How many lanes the client can use */

-- 
Regards,

Laurent Pinchart
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