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Date:   Fri, 12 Apr 2019 19:48:16 -0300
From:   Helen Koike <helen.koike@...labora.com>
To:     André Almeida <andrealmeid@...labora.com>,
        linux-media@...r.kernel.org
Cc:     mchehab@...nel.org, hverkuil@...all.nl, lucmaga@...il.com,
        linux-kernel@...r.kernel.org, kernel@...labora.com,
        lkcamp@...ts.libreplanetbr.org
Subject: Re: [PATCH v2 02/15] media: vimc: Remove unnecessary stream checks



On 3/27/19 12:17 PM, André Almeida wrote:
> Change the way subdevices check if the stream is running. Verify the stream
> pointer instead of src_frame. This makes easier to get rid of the void* and
> u8* in the subdevices structs. Also, remove redundant checks for stream.
> 
> Signed-off-by: André Almeida <andrealmeid@...labora.com>

Acked-by: Helen Koike <helen.koike@...labora.com>

> ---
> Changes in v2:
> - Squashed commits that remove unnecessary checks together
> - Reworded commit message
> 
>  drivers/media/platform/vimc/vimc-debayer.c | 5 +----
>  drivers/media/platform/vimc/vimc-scaler.c  | 7 ++-----
>  drivers/media/platform/vimc/vimc-sensor.c  | 6 +-----
>  3 files changed, 4 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/media/platform/vimc/vimc-debayer.c b/drivers/media/platform/vimc/vimc-debayer.c
> index 419ad57a4f5c..613b7abbe06e 100644
> --- a/drivers/media/platform/vimc/vimc-debayer.c
> +++ b/drivers/media/platform/vimc/vimc-debayer.c
> @@ -270,7 +270,7 @@ static int vimc_deb_set_fmt(struct v4l2_subdev *sd,
>  
>  	if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
>  		/* Do not change the format while stream is on */
> -		if (vdeb->src_frame)
> +		if (vdeb->ved.stream)
>  			return -EBUSY;
>  
>  		sink_fmt = &vdeb->sink_fmt;
> @@ -337,9 +337,6 @@ static int vimc_deb_s_stream(struct v4l2_subdev *sd, int enable)
>  		const struct v4l2_format_info *pix_info;
>  		unsigned int frame_size;
>  
> -		if (vdeb->src_frame)
> -			return 0;
> -
>  		/* We only support translating bayer to RGB24 */
>  		if (src_pixelformat != V4L2_PIX_FMT_RGB24) {
>  			dev_err(vdeb->dev,
> diff --git a/drivers/media/platform/vimc/vimc-scaler.c b/drivers/media/platform/vimc/vimc-scaler.c
> index f15542920bdc..8544c745c6e6 100644
> --- a/drivers/media/platform/vimc/vimc-scaler.c
> +++ b/drivers/media/platform/vimc/vimc-scaler.c
> @@ -158,7 +158,7 @@ static int vimc_sca_set_fmt(struct v4l2_subdev *sd,
>  
>  	if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
>  		/* Do not change the format while stream is on */
> -		if (vsca->src_frame)
> +		if (vsca->ved.stream)
>  			return -EBUSY;
>  
>  		sink_fmt = &vsca->sink_fmt;
> @@ -213,9 +213,6 @@ static int vimc_sca_s_stream(struct v4l2_subdev *sd, int enable)
>  		const struct v4l2_format_info *pix_info;
>  		unsigned int frame_size;
>  
> -		if (vsca->src_frame)
> -			return 0;
> -
>  		if (!vimc_sca_is_pixfmt_supported(pixelformat)) {
>  			dev_err(vsca->dev, "pixfmt (%s) is not supported\n",
>  				v4l2_get_fourcc_name(pixelformat));
> @@ -337,7 +334,7 @@ static void *vimc_sca_process_frame(struct vimc_ent_device *ved,
>  						    ved);
>  
>  	/* If the stream in this node is not active, just return */
> -	if (!vsca->src_frame)
> +	if (!ved->stream)
>  		return ERR_PTR(-EINVAL);
>  
>  	vimc_sca_fill_src_frame(vsca, sink_frame);
> diff --git a/drivers/media/platform/vimc/vimc-sensor.c b/drivers/media/platform/vimc/vimc-sensor.c
> index 081e54204c9f..1b2b75b27952 100644
> --- a/drivers/media/platform/vimc/vimc-sensor.c
> +++ b/drivers/media/platform/vimc/vimc-sensor.c
> @@ -141,7 +141,7 @@ static int vimc_sen_set_fmt(struct v4l2_subdev *sd,
>  
>  	if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
>  		/* Do not change the format while stream is on */
> -		if (vsen->frame)
> +		if (vsen->ved.stream)
>  			return -EBUSY;
>  
>  		mf = &vsen->mbus_format;
> @@ -197,10 +197,6 @@ static int vimc_sen_s_stream(struct v4l2_subdev *sd, int enable)
>  		const struct v4l2_format_info *pix_info;
>  		unsigned int frame_size;
>  
> -		if (vsen->kthread_sen)
> -			/* tpg is already executing */
> -			return 0;
> -
>  		/* Calculate the frame size */
>  		pix_info = v4l2_format_info(pixelformat);
>  		frame_size = vsen->mbus_format.width * pix_info->bpp[0] *
> 

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