linux-kernel - Re: [PATCH] media: au0828: drop vbi_buffer_filled() and re-use buffer

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Date:	Mon, 23 Feb 2015 09:25:48 -0700
From:	Shuah Khan <shuahkh@....samsung.com>
To:	Lad Prabhakar <prabhakar.csengg@...il.com>,
	Hans Verkuil <hans.verkuil@...co.com>,
	linux-media@...r.kernel.org
CC:	linux-kernel@...r.kernel.org,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Shuah Khan <shuahkh@....samsung.com>
Subject: Re: [PATCH] media: au0828: drop vbi_buffer_filled() and re-use buffer_filled()

Hi Prabhakar,

Thanks for getting to this before I could. Couple of comments,
mainly typos in commit log.

On 02/23/2015 08:06 AM, Lad Prabhakar wrote:
> From: "Lad, Prabhakar" <prabhakar.csengg@...il.com>
> 
> The vbi_buffer_filled() and buffer_filled() did the same functionality
> except for incrementing the buffer sequence, this patch drops the
> vbi_buffer_filled() and re-uses buffer_filled() for vbi buffers
> aswell by adding the check for vb2-queue type while incrementing

as well

> the sequence numbers. Along side this patch aligns the code.

Not sure about this last line "aligns the code" - please elaborate.
I am guessing it is the input arguments in buffer_filled() function?

Otherwise looks good. You have my Acked-by once the commit log is fixed.

Acked-by: Shuah Khan <shuahkh@....samsung.com>

thanks,
-- Shuah

> 
> Signed-off-by: Lad, Prabhakar <prabhakar.csengg@...il.com>
> ---
>  drivers/media/usb/au0828/au0828-video.c | 36 +++++++++++++--------------------
>  1 file changed, 14 insertions(+), 22 deletions(-)
> 
> diff --git a/drivers/media/usb/au0828/au0828-video.c b/drivers/media/usb/au0828/au0828-video.c
> index a27cb5f..60012ec 100644
> --- a/drivers/media/usb/au0828/au0828-video.c
> +++ b/drivers/media/usb/au0828/au0828-video.c
> @@ -299,29 +299,23 @@ static int au0828_init_isoc(struct au0828_dev *dev, int max_packets,
>   * Announces that a buffer were filled and request the next
>   */
>  static inline void buffer_filled(struct au0828_dev *dev,
> -				  struct au0828_dmaqueue *dma_q,
> -				  struct au0828_buffer *buf)
> +				 struct au0828_dmaqueue *dma_q,
> +				 struct au0828_buffer *buf)
>  {
> -	/* Advice that buffer was filled */
> -	au0828_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field);
> -
> -	buf->vb.v4l2_buf.sequence = dev->frame_count++;
> -	buf->vb.v4l2_buf.field = V4L2_FIELD_INTERLACED;
> -	v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
> -	vb2_buffer_done(&buf->vb, VB2_BUF_STATE_DONE);
> -}
> +	struct vb2_buffer vb = buf->vb;
> +	struct vb2_queue *q = vb.vb2_queue;
>  
> -static inline void vbi_buffer_filled(struct au0828_dev *dev,
> -				     struct au0828_dmaqueue *dma_q,
> -				     struct au0828_buffer *buf)
> -{
>  	/* Advice that buffer was filled */
>  	au0828_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field);
>  
> -	buf->vb.v4l2_buf.sequence = dev->vbi_frame_count++;
> -	buf->vb.v4l2_buf.field = V4L2_FIELD_INTERLACED;
> -	v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
> -	vb2_buffer_done(&buf->vb, VB2_BUF_STATE_DONE);
> +	if (q->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
> +		vb.v4l2_buf.sequence = dev->frame_count++;
> +	else
> +		vb.v4l2_buf.sequence = dev->vbi_frame_count++;
> +
> +	vb.v4l2_buf.field = V4L2_FIELD_INTERLACED;
> +	v4l2_get_timestamp(&vb.v4l2_buf.timestamp);
> +	vb2_buffer_done(&vb, VB2_BUF_STATE_DONE);
>  }
>  
>  /*
> @@ -574,9 +568,7 @@ static inline int au0828_isoc_copy(struct au0828_dev *dev, struct urb *urb)
>  			if (fbyte & 0x40) {
>  				/* VBI */
>  				if (vbi_buf != NULL)
> -					vbi_buffer_filled(dev,
> -							  vbi_dma_q,
> -							  vbi_buf);
> +					buffer_filled(dev, vbi_dma_q, vbi_buf);
>  				vbi_get_next_buf(vbi_dma_q, &vbi_buf);
>  				if (vbi_buf == NULL)
>  					vbioutp = NULL;
> @@ -949,7 +941,7 @@ static void au0828_vbi_buffer_timeout(unsigned long data)
>  	if (buf != NULL) {
>  		vbi_data = vb2_plane_vaddr(&buf->vb, 0);
>  		memset(vbi_data, 0x00, buf->length);
> -		vbi_buffer_filled(dev, dma_q, buf);
> +		buffer_filled(dev, dma_q, buf);
>  	}
>  	vbi_get_next_buf(dma_q, &buf);
>  
> 


-- 
Shuah Khan
Sr. Linux Kernel Developer
Open Source Innovation Group
Samsung Research America (Silicon Valley)
shuahkh@....samsung.com | (970) 217-8978
--
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