[PATCH 2/2 v2] i.MX27: Visstrim_M10: Add support for deinterlacing driver.

[Sascha Hauer]

On Thu, Jul 12, 2012 at 01:35:29PM +0200, Javier Martin wrote:
> Visstrim_M10 have a tvp5150 whose video output must be deinterlaced.
> The new mem2mem deinterlacing driver is very useful for that purpose.
> 
> Signed-off-by: Javier Martin <javier.martin at vista-silicon.com>
> ---
> Changes since v1:
>  - Removed commented out code.
> 
> ---
>  arch/arm/mach-imx/mach-imx27_visstrim_m10.c |   27 ++++++++++++++++++++++++++-
>  1 file changed, 26 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/mach-imx/mach-imx27_visstrim_m10.c b/arch/arm/mach-imx/mach-imx27_visstrim_m10.c
> index 214e4ff..dbef59d 100644
> --- a/arch/arm/mach-imx/mach-imx27_visstrim_m10.c
> +++ b/arch/arm/mach-imx/mach-imx27_visstrim_m10.c
> @@ -232,7 +232,7 @@ static void __init visstrim_camera_init(void)
>  static void __init visstrim_reserve(void)
>  {
>  	/* reserve 4 MiB for mx2-camera */
> -	mx2_camera_base = arm_memblock_steal(2 * MX2_CAMERA_BUF_SIZE,
> +	mx2_camera_base = arm_memblock_steal(3 * MX2_CAMERA_BUF_SIZE,
>  			MX2_CAMERA_BUF_SIZE);
>  }
>  
> @@ -419,6 +419,30 @@ static void __init visstrim_coda_init(void)
>  		return;
>  }
>  
> +/* DMA deinterlace */
> +static struct platform_device visstrim_deinterlace = {
> +	.name = "m2m-deinterlace",
> +	.id = 0,
> +};
> +
> +static void __init visstrim_deinterlace_init(void)
> +{
> +	int ret = -ENOMEM;
> +	struct platform_device *pdev = &visstrim_deinterlace;
> +	int dma;
> +
> +	ret = platform_device_register(pdev);

ret is unused.

Better use platform_device_register_simple().

> +
> +	dma = dma_declare_coherent_memory(&pdev->dev,
> +					  mx2_camera_base + 2 * MX2_CAMERA_BUF_SIZE,
> +					  mx2_camera_base + 2 * MX2_CAMERA_BUF_SIZE,
> +					  MX2_CAMERA_BUF_SIZE,
> +					  DMA_MEMORY_MAP | DMA_MEMORY_EXCLUSIVE);

Shouldn't this be done before registering the device?

> +	if (!(dma & DMA_MEMORY_MAP))
> +		return;
> +}

if (!flag) return; else return ?

Sascha


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