Re: [PATCH v4 40/45] media: sun6i-csi: Only configure capture when streaming

["Jernej Škrabec" <jernej.skrabec@gmail.com>]

Dne petek, 15. april 2022 ob 17:28:06 CEST je Paul Kocialkowski napisal(a):
> Add a streaming element to the capture state structure to know if the
> capture device is used or not. Only configure things related to output
> when streaming, including the output format, irq, state (dma buffer)
> and window configuration registers.
> 
> After this change, it becomes possible to use the bridge without the
> capture device, which will be the case in the isp media flow.
> 
> Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>

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

Best regards,
Jernej

> ---
>  .../sunxi/sun6i-csi/sun6i_csi_bridge.c        | 50 ++++++++++++-------
>  .../sunxi/sun6i-csi/sun6i_csi_capture.c       | 11 +++-
>  .../sunxi/sun6i-csi/sun6i_csi_capture.h       |  1 +
>  3 files changed, 41 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_bridge.c
> b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_bridge.c index
> 27289d904d5c..8e9eded0df28 100644
> --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_bridge.c
> +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_bridge.c
> @@ -338,6 +338,7 @@ sun6i_csi_bridge_configure_mipi_csi2(struct
> sun6i_csi_device *csi_dev) static void
> sun6i_csi_bridge_configure_format(struct sun6i_csi_device *csi_dev) {
>  	struct regmap *regmap = csi_dev->regmap;
> +	bool capture_streaming = csi_dev->capture.state.streaming;
>  	const struct sun6i_csi_bridge_format *bridge_format;
>  	const struct sun6i_csi_capture_format *capture_format;
>  	u32 mbus_code, field, pixelformat;
> @@ -353,26 +354,29 @@ static void sun6i_csi_bridge_configure_format(struct
> sun6i_csi_device *csi_dev) input_format = bridge_format->input_format;
>  	input_yuv_seq = bridge_format->input_yuv_seq;
> 
> -	sun6i_csi_capture_format(csi_dev, &pixelformat, NULL);
> +	if (capture_streaming) {
> +		sun6i_csi_capture_format(csi_dev, &pixelformat, NULL);
> 
> -	capture_format = sun6i_csi_capture_format_find(pixelformat);
> -	if (WARN_ON(!capture_format))
> -		return;
> +		capture_format = 
sun6i_csi_capture_format_find(pixelformat);
> +		if (WARN_ON(!capture_format))
> +			return;
> 
> -	if (capture_format->input_format_raw)
> -		input_format = SUN6I_CSI_INPUT_FMT_RAW;
> +		if (capture_format->input_format_raw)
> +			input_format = SUN6I_CSI_INPUT_FMT_RAW;
> 
> -	if (capture_format->input_yuv_seq_invert)
> -		input_yuv_seq = bridge_format->input_yuv_seq_invert;
> +		if (capture_format->input_yuv_seq_invert)
> +			input_yuv_seq = bridge_format-
>input_yuv_seq_invert;
> 
> -	if (field == V4L2_FIELD_INTERLACED ||
> -	    field == V4L2_FIELD_INTERLACED_TB ||
> -	    field == V4L2_FIELD_INTERLACED_BT)
> -		output_format = capture_format->output_format_field;
> -	else
> -		output_format = capture_format->output_format_frame;
> +		if (field == V4L2_FIELD_INTERLACED ||
> +		    field == V4L2_FIELD_INTERLACED_TB ||
> +		    field == V4L2_FIELD_INTERLACED_BT)
> +			output_format = capture_format-
>output_format_field;
> +		else
> +			output_format = capture_format-
>output_format_frame;
> +
> +		value |= SUN6I_CSI_CH_CFG_OUTPUT_FMT(output_format);
> +	}
> 
> -	value |= SUN6I_CSI_CH_CFG_OUTPUT_FMT(output_format);
>  	value |= SUN6I_CSI_CH_CFG_INPUT_FMT(input_format);
>  	value |= SUN6I_CSI_CH_CFG_INPUT_YUV_SEQ(input_yuv_seq);
> 
> @@ -406,6 +410,7 @@ static int sun6i_csi_bridge_s_stream(struct v4l2_subdev
> *subdev, int on) struct sun6i_csi_device *csi_dev =
> v4l2_get_subdevdata(subdev);
>  	struct sun6i_csi_bridge *bridge = &csi_dev->bridge;
>  	struct media_entity *bridge_entity = &bridge->subdev.entity;
> +	bool capture_streaming = csi_dev->capture.state.streaming;
>  	struct device *dev = csi_dev->dev;
>  	struct sun6i_csi_bridge_source *source;
>  	struct v4l2_subdev *source_subdev;
> @@ -448,15 +453,20 @@ static int sun6i_csi_bridge_s_stream(struct
> v4l2_subdev *subdev, int on) /* Configure */
> 
>  	sun6i_csi_bridge_configure(csi_dev, source);
> -	sun6i_csi_capture_configure(csi_dev);
> +
> +	if (capture_streaming)
> +		sun6i_csi_capture_configure(csi_dev);
> 
>  	/* State Update */
> 
> -	sun6i_csi_capture_state_update(csi_dev);
> +	if (capture_streaming)
> +		sun6i_csi_capture_state_update(csi_dev);
> 
>  	/* Enable */
> 
> -	sun6i_csi_bridge_irq_enable(csi_dev);
> +	if (capture_streaming)
> +		sun6i_csi_bridge_irq_enable(csi_dev);
> +
>  	sun6i_csi_bridge_enable(csi_dev);
> 
>  	ret = v4l2_subdev_call(source_subdev, video, s_stream, 1);
> @@ -466,7 +476,9 @@ static int sun6i_csi_bridge_s_stream(struct v4l2_subdev
> *subdev, int on) return 0;
> 
>  disable:
> -	sun6i_csi_bridge_irq_disable(csi_dev);
> +	if (capture_streaming)
> +		sun6i_csi_bridge_irq_disable(csi_dev);
> +
>  	sun6i_csi_bridge_disable(csi_dev);
> 
>  	pm_runtime_put(dev);
> 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
> f1581b877819..17145ce53395 100644
> --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.c
> +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.c
> @@ -616,13 +616,17 @@ static int sun6i_csi_capture_start_streaming(struct
> vb2_queue *queue, if (ret < 0)
>  		goto error_state;
> 
> +	state->streaming = true;
> +
>  	ret = v4l2_subdev_call(subdev, video, s_stream, 1);
>  	if (ret && ret != -ENOIOCTLCMD)
> -		goto error_media_pipeline;
> +		goto error_streaming;
> 
>  	return 0;
> 
> -error_media_pipeline:
> +error_streaming:
> +	state->streaming = false;
> +
>  	media_pipeline_stop(&video_dev->entity);
> 
>  error_state:
> @@ -634,11 +638,14 @@ static int sun6i_csi_capture_start_streaming(struct
> vb2_queue *queue, 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_state *state = &csi_dev->capture.state;
>  	struct video_device *video_dev = &csi_dev->capture.video_dev;
>  	struct v4l2_subdev *subdev = &csi_dev->bridge.subdev;
> 
>  	v4l2_subdev_call(subdev, video, s_stream, 0);
> 
> +	state->streaming = false;
> +
>  	media_pipeline_stop(&video_dev->entity);
> 
>  	sun6i_csi_capture_state_cleanup(csi_dev, true);
> diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.h
> b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.h index
> ceceb030aef6..29893cf96f6b 100644
> --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.h
> +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_capture.h
> @@ -44,6 +44,7 @@ struct sun6i_csi_capture_state {
>  	struct sun6i_csi_buffer		*complete;
> 
>  	unsigned int			sequence;
> +	bool				streaming;
>  };
> 
>  struct sun6i_csi_capture {