linux-kernel - Re: [PATCH 3/4] media: pxa_camera: trivial move of dma irq functions

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Message-ID: <Pine.LNX.4.64.1506201503550.31977@axis700.grange>
Date:	Sat, 20 Jun 2015 15:29:00 +0200 (CEST)
From:	Guennadi Liakhovetski <g.liakhovetski@....de>
To:	Robert Jarzmik <robert.jarzmik@...e.fr>
cc:	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Jiri Kosina <trivial@...nel.org>, linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org, Daniel Mack <zonque@...il.com>,
	Robert Jarzmik <robert.jarzmik@...el.com>
Subject: Re: [PATCH 3/4] media: pxa_camera: trivial move of dma irq functions

On Sun, 22 Mar 2015, Robert Jarzmik wrote:

> From: Robert Jarzmik <robert.jarzmik@...el.com>
> 
> This moves the dma irq handling functions up in the source file, so that
> they are available before DMA preparation functions. It prepares the
> conversion to DMA engine, where the descriptors are populated with these
> functions as callbacks.
> 
> Signed-off-by: Robert Jarzmik <robert.jarzmik@...el.com>
> ---
>  drivers/media/platform/soc_camera/pxa_camera.c | 40 ++++++++++++++------------
>  1 file changed, 22 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/media/platform/soc_camera/pxa_camera.c b/drivers/media/platform/soc_camera/pxa_camera.c
> index c0c0f0f..8b39f44 100644
> --- a/drivers/media/platform/soc_camera/pxa_camera.c
> +++ b/drivers/media/platform/soc_camera/pxa_camera.c
> @@ -311,6 +311,28 @@ static int calculate_dma_sglen(struct scatterlist *sglist, int sglen,
>  
>  	BUG_ON(size != 0);
>  	return i + 1;
> +static void pxa_camera_dma_irq(struct pxa_camera_dev *pcdev,
> +			       enum pxa_camera_active_dma act_dma);
> +
> +static void pxa_camera_dma_irq_y(void *data)

Wait, how is this patch trivial? You change pxa_camera_dma_irq_?() 
prototypes, which are used as PXA DMA callbacks. Does this mean, that 
either before or after this patch compilation is broken?

Thanks
Guennadi

> +{
> +	struct pxa_camera_dev *pcdev = data;
> +
> +	pxa_camera_dma_irq(pcdev, DMA_Y);
> +}
> +
> +static void pxa_camera_dma_irq_u(void *data)
> +{
> +	struct pxa_camera_dev *pcdev = data;
> +
> +	pxa_camera_dma_irq(pcdev, DMA_U);
> +}
> +
> +static void pxa_camera_dma_irq_v(void *data)
> +{
> +	struct pxa_camera_dev *pcdev = data;
> +
> +	pxa_camera_dma_irq(pcdev, DMA_V);
>  }
>  
>  /**
> @@ -810,24 +832,6 @@ out:
>  	spin_unlock_irqrestore(&pcdev->lock, flags);
>  }
>  
> -static void pxa_camera_dma_irq_y(int channel, void *data)
> -{
> -	struct pxa_camera_dev *pcdev = data;
> -	pxa_camera_dma_irq(channel, pcdev, DMA_Y);
> -}
> -
> -static void pxa_camera_dma_irq_u(int channel, void *data)
> -{
> -	struct pxa_camera_dev *pcdev = data;
> -	pxa_camera_dma_irq(channel, pcdev, DMA_U);
> -}
> -
> -static void pxa_camera_dma_irq_v(int channel, void *data)
> -{
> -	struct pxa_camera_dev *pcdev = data;
> -	pxa_camera_dma_irq(channel, pcdev, DMA_V);
> -}
> -
>  static struct videobuf_queue_ops pxa_videobuf_ops = {
>  	.buf_setup      = pxa_videobuf_setup,
>  	.buf_prepare    = pxa_videobuf_prepare,
> -- 
> 2.1.4
> 
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