linux-kernel - Re: [PATCH v4 35/45] media: sun6i-csi: Get bridge subdev directly in capture stream ops

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Date:   Wed, 27 Apr 2022 21:47:27 +0200
From:   Jernej Škrabec <jernej.skrabec@...il.com>
To:     linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>
Cc:     Yong Deng <yong.deng@...ewell.com>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Samuel Holland <samuel@...lland.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v4 35/45] media: sun6i-csi: Get bridge subdev directly in capture stream ops

Dne petek, 15. april 2022 ob 17:28:01 CEST je Paul Kocialkowski napisal(a):
> The remote subdev connected to the capture video device is always
> our bridge, so get the bridge subdev directly instead of using a
> dedicated helper (which is removed by this commit).
> 
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>

Acked-by: Jernej Skrabec <jernej.skrabec@...il.com>

Best regards,
Jernej

> ---
>  .../sunxi/sun6i-csi/sun6i_csi_capture.c       | 30 ++-----------------
>  1 file changed, 3 insertions(+), 27 deletions(-)
> 
> diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.c
> b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.c index
> b3452ed825ad..b92f8aa55a92 100644
> --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.c
> +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.c
> @@ -42,22 +42,6 @@ void sun6i_csi_capture_format(struct sun6i_csi_device
> *csi_dev, *field = csi_dev->capture.format.fmt.pix.field;
>  }
> 
> -static struct v4l2_subdev *
> -sun6i_csi_capture_remote_subdev(struct sun6i_csi_capture *capture, u32
> *pad) -{
> -	struct media_pad *remote;
> -
> -	remote = media_entity_remote_pad(&capture->pad);
> -
> -	if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
> -		return NULL;
> -
> -	if (pad)
> -		*pad = remote->index;
> -
> -	return media_entity_to_v4l2_subdev(remote->entity);
> -}
> -
>  /* Format */
> 
>  static const struct sun6i_csi_capture_format sun6i_csi_capture_formats[] =
> { @@ -822,8 +806,8 @@ static int sun6i_csi_capture_start_streaming(struct
> vb2_queue *queue, struct sun6i_csi_capture *capture = &csi_dev->capture;
>  	struct sun6i_csi_capture_state *state = &capture->state;
>  	struct video_device *video_dev = &capture->video_dev;
> +	struct v4l2_subdev *subdev = &csi_dev->bridge.subdev;
>  	struct device *dev = csi_dev->dev;
> -	struct v4l2_subdev *subdev;
>  	int ret;
> 
>  	state->sequence = 0;
> @@ -832,12 +816,6 @@ static int sun6i_csi_capture_start_streaming(struct
> vb2_queue *queue, if (ret < 0)
>  		goto error_state;
> 
> -	subdev = sun6i_csi_capture_remote_subdev(capture, NULL);
> -	if (!subdev) {
> -		ret = -EINVAL;
> -		goto error_media_pipeline;
> -	}
> -
>  	/* PM */
> 
>  	ret = pm_runtime_resume_and_get(dev);
> @@ -886,12 +864,10 @@ static void sun6i_csi_capture_stop_streaming(struct
> vb2_queue *queue) {
>  	struct sun6i_csi_device *csi_dev = vb2_get_drv_priv(queue);
>  	struct sun6i_csi_capture *capture = &csi_dev->capture;
> +	struct v4l2_subdev *subdev = &csi_dev->bridge.subdev;
>  	struct device *dev = csi_dev->dev;
> -	struct v4l2_subdev *subdev;
> 
> -	subdev = sun6i_csi_capture_remote_subdev(capture, NULL);
> -	if (subdev)
> -		v4l2_subdev_call(subdev, video, s_stream, 0);
> +	v4l2_subdev_call(subdev, video, s_stream, 0);
> 
>  	sun6i_csi_capture_disable(csi_dev);
>  	sun6i_csi_capture_irq_disable(csi_dev);