diff mbox

[09/15] media: soc_camera pad-aware driver initialisation

Message ID 1433340002-1691-10-git-send-email-william.towle@codethink.co.uk (mailing list archive)
State Superseded, archived
Delegated to: Hans Verkuil
Headers

Commit Message

William Towle June 3, 2015, 1:59 p.m. UTC 
  Add detection of source pad number for drivers aware of the media
controller API, so that the combination of soc_camera and rcar_vin
can create device nodes to support modern drivers such as adv7604.c
(for HDMI on Lager) and the converted adv7180.c (for composite)
underneath.

Building rcar_vin gains a dependency on CONFIG_MEDIA_CONTROLLER, in
line with requirements for building the drivers associated with it.

Signed-off-by: William Towle <william.towle@codethink.co.uk>
Signed-off-by: Rob Taylor <rob.taylor@codethink.co.uk>
---
 drivers/media/platform/soc_camera/Kconfig      |    1 +
 drivers/media/platform/soc_camera/rcar_vin.c   |    1 +
 drivers/media/platform/soc_camera/soc_camera.c |   46 ++++++++++++++++++++++++
 include/media/soc_camera.h                     |    1 +
 4 files changed, 49 insertions(+)

Comments

Hans Verkuil June 12, 2015, 9:15 a.m. UTC | #1 
On 06/03/2015 03:59 PM, William Towle wrote:
> Add detection of source pad number for drivers aware of the media
> controller API, so that the combination of soc_camera and rcar_vin
> can create device nodes to support modern drivers such as adv7604.c
> (for HDMI on Lager) and the converted adv7180.c (for composite)
> underneath.
> 
> Building rcar_vin gains a dependency on CONFIG_MEDIA_CONTROLLER, in
> line with requirements for building the drivers associated with it.
> 
> Signed-off-by: William Towle <william.towle@codethink.co.uk>
> Signed-off-by: Rob Taylor <rob.taylor@codethink.co.uk>
> ---
>  drivers/media/platform/soc_camera/Kconfig      |    1 +
>  drivers/media/platform/soc_camera/rcar_vin.c   |    1 +
>  drivers/media/platform/soc_camera/soc_camera.c |   46 ++++++++++++++++++++++++
>  include/media/soc_camera.h                     |    1 +
>  4 files changed, 49 insertions(+)
> 
> diff --git a/drivers/media/platform/soc_camera/Kconfig b/drivers/media/platform/soc_camera/Kconfig
> index f2776cd..5c45c83 100644
> --- a/drivers/media/platform/soc_camera/Kconfig
> +++ b/drivers/media/platform/soc_camera/Kconfig
> @@ -38,6 +38,7 @@ config VIDEO_RCAR_VIN
>  	depends on VIDEO_DEV && SOC_CAMERA
>  	depends on ARCH_SHMOBILE || COMPILE_TEST
>  	depends on HAS_DMA
> +	depends on MEDIA_CONTROLLER
>  	select VIDEOBUF2_DMA_CONTIG
>  	select SOC_CAMERA_SCALE_CROP
>  	---help---
> diff --git a/drivers/media/platform/soc_camera/rcar_vin.c b/drivers/media/platform/soc_camera/rcar_vin.c
> index 16352a8..00c1034 100644
> --- a/drivers/media/platform/soc_camera/rcar_vin.c
> +++ b/drivers/media/platform/soc_camera/rcar_vin.c
> @@ -1359,6 +1359,7 @@ static int rcar_vin_get_formats(struct soc_camera_device *icd, unsigned int idx,
>  		struct device *dev = icd->parent;
>  		int shift;
>  
> +		fmt.pad = icd->src_pad_idx;
>  		ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
>  		if (ret < 0)
>  			return ret;
> diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c
> index d708df4..c4952c8 100644
> --- a/drivers/media/platform/soc_camera/soc_camera.c
> +++ b/drivers/media/platform/soc_camera/soc_camera.c
> @@ -1293,6 +1293,9 @@ static int soc_camera_probe_finish(struct soc_camera_device *icd)
>  		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
>  	};
>  	struct v4l2_mbus_framefmt *mf = &fmt.format;
> +#if defined(CONFIG_MEDIA_CONTROLLER)
> +	struct media_pad pad;
> +#endif
>  	int ret;
>  
>  	sd->grp_id = soc_camera_grp_id(icd);
> @@ -1310,8 +1313,40 @@ static int soc_camera_probe_finish(struct soc_camera_device *icd)
>  		return ret;
>  	}
>  
> +	icd->src_pad_idx = -1;

If CONFIG_MEDIA_CONTROLLER is not defined, then I would expect that src_pad_idx should
be 0, not -1.

> +#if defined(CONFIG_MEDIA_CONTROLLER)
>  	/* At this point client .probe() should have run already */
> +	ret = media_entity_init(&icd->vdev->entity, 1, &pad, 0);
> +	if (ret < 0) {
> +		goto eusrfmt;
> +	} else {
> +		int pad_idx;
> +
> +		for (pad_idx = 0; pad_idx < sd->entity.num_pads; pad_idx++)
> +			if (sd->entity.pads[pad_idx].flags
> +					== MEDIA_PAD_FL_SOURCE)
> +				break;
> +		if (pad_idx >= sd->entity.num_pads)
> +			goto eusrfmt;
> +
> +		ret = media_entity_create_link(&icd->vdev->entity, 0,
> +						&sd->entity, pad_idx,
> +						MEDIA_LNK_FL_IMMUTABLE |
> +						MEDIA_LNK_FL_ENABLED);

Why would you want to create a link and set up the vdev entity?

All you need to do here is to find the sd source pad and store it in
sd->src_pad_idx.

You are not registering a media device here, so there is no need to
do anything more. I'd drop all that code.

> +		if (ret < 0)
> +			goto eusrfmt;
> +
> +		icd->src_pad_idx = pad_idx;
> +		ret = soc_camera_init_user_formats(icd);
> +		if (ret < 0) {
> +			icd->src_pad_idx = -1;
> +			goto eusrfmt;
> +		}
> +	}
> +#else
>  	ret = soc_camera_init_user_formats(icd);
> +#endif
> +
>  	if (ret < 0)
>  		goto eusrfmt;
>  
> @@ -1322,6 +1357,9 @@ static int soc_camera_probe_finish(struct soc_camera_device *icd)
>  		goto evidstart;
>  
>  	/* Try to improve our guess of a reasonable window format */
> +#if defined(CONFIG_MEDIA_CONTROLLER)
> +	fmt.pad = icd->src_pad_idx;
> +#endif

If src_pad_idx is 0 if CONFIG_MEDIA_CONTROLLER is undefined, then you don't need the
#if defined() here.

Regards,

	Hans

>  	if (!v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt)) {
>  		icd->user_width		= mf->width;
>  		icd->user_height	= mf->height;
> @@ -1335,6 +1373,9 @@ static int soc_camera_probe_finish(struct soc_camera_device *icd)
>  evidstart:
>  	soc_camera_free_user_formats(icd);
>  eusrfmt:
> +#if defined(CONFIG_MEDIA_CONTROLLER)
> +	media_entity_cleanup(&icd->vdev->entity);
> +#endif
>  	soc_camera_remove_device(icd);
>  
>  	return ret;
> @@ -1856,6 +1897,11 @@ static int soc_camera_remove(struct soc_camera_device *icd)
>  	if (icd->num_user_formats)
>  		soc_camera_free_user_formats(icd);
>  
> +#if defined(CONFIG_MEDIA_CONTROLLER)
> +	if (icd->vdev->entity.num_pads)
> +		media_entity_cleanup(&icd->vdev->entity);
> +#endif
> +
>  	if (icd->clk) {
>  		/* For the synchronous case */
>  		v4l2_clk_unregister(icd->clk);
> diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h
> index 2f6261f..30193cf 100644
> --- a/include/media/soc_camera.h
> +++ b/include/media/soc_camera.h
> @@ -42,6 +42,7 @@ struct soc_camera_device {
>  	unsigned char devnum;		/* Device number per host */
>  	struct soc_camera_sense *sense;	/* See comment in struct definition */
>  	struct video_device *vdev;
> +	int src_pad_idx;		/* For media-controller drivers */
>  	struct v4l2_ctrl_handler ctrl_handler;
>  	const struct soc_camera_format_xlate *current_fmt;
>  	struct soc_camera_format_xlate *user_formats;
> 

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Guennadi Liakhovetski June 14, 2015, 9:40 a.m. UTC | #2 
Hi William,

On Wed, 3 Jun 2015, William Towle wrote:

> Add detection of source pad number for drivers aware of the media
> controller API, so that the combination of soc_camera and rcar_vin
> can create device nodes to support modern drivers such as adv7604.c
> (for HDMI on Lager) and the converted adv7180.c (for composite)
> underneath.
> 
> Building rcar_vin gains a dependency on CONFIG_MEDIA_CONTROLLER, in
> line with requirements for building the drivers associated with it.
> 
> Signed-off-by: William Towle <william.towle@codethink.co.uk>
> Signed-off-by: Rob Taylor <rob.taylor@codethink.co.uk>
> ---
>  drivers/media/platform/soc_camera/Kconfig      |    1 +
>  drivers/media/platform/soc_camera/rcar_vin.c   |    1 +
>  drivers/media/platform/soc_camera/soc_camera.c |   46 ++++++++++++++++++++++++
>  include/media/soc_camera.h                     |    1 +
>  4 files changed, 49 insertions(+)
> 
> diff --git a/drivers/media/platform/soc_camera/Kconfig b/drivers/media/platform/soc_camera/Kconfig
> index f2776cd..5c45c83 100644
> --- a/drivers/media/platform/soc_camera/Kconfig
> +++ b/drivers/media/platform/soc_camera/Kconfig
> @@ -38,6 +38,7 @@ config VIDEO_RCAR_VIN
>  	depends on VIDEO_DEV && SOC_CAMERA
>  	depends on ARCH_SHMOBILE || COMPILE_TEST
>  	depends on HAS_DMA
> +	depends on MEDIA_CONTROLLER
>  	select VIDEOBUF2_DMA_CONTIG
>  	select SOC_CAMERA_SCALE_CROP
>  	---help---
> diff --git a/drivers/media/platform/soc_camera/rcar_vin.c b/drivers/media/platform/soc_camera/rcar_vin.c
> index 16352a8..00c1034 100644
> --- a/drivers/media/platform/soc_camera/rcar_vin.c
> +++ b/drivers/media/platform/soc_camera/rcar_vin.c
> @@ -1359,6 +1359,7 @@ static int rcar_vin_get_formats(struct soc_camera_device *icd, unsigned int idx,
>  		struct device *dev = icd->parent;
>  		int shift;
>  
> +		fmt.pad = icd->src_pad_idx;
>  		ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
>  		if (ret < 0)
>  			return ret;
> diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c
> index d708df4..c4952c8 100644
> --- a/drivers/media/platform/soc_camera/soc_camera.c
> +++ b/drivers/media/platform/soc_camera/soc_camera.c
> @@ -1293,6 +1293,9 @@ static int soc_camera_probe_finish(struct soc_camera_device *icd)
>  		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
>  	};
>  	struct v4l2_mbus_framefmt *mf = &fmt.format;
> +#if defined(CONFIG_MEDIA_CONTROLLER)
> +	struct media_pad pad;
> +#endif
>  	int ret;
>  
>  	sd->grp_id = soc_camera_grp_id(icd);
> @@ -1310,8 +1313,40 @@ static int soc_camera_probe_finish(struct soc_camera_device *icd)
>  		return ret;
>  	}
>  
> +	icd->src_pad_idx = -1;
> +#if defined(CONFIG_MEDIA_CONTROLLER)
>  	/* At this point client .probe() should have run already */

Please, leave this comment outside of #ifdef.

> +	ret = media_entity_init(&icd->vdev->entity, 1, &pad, 0);
> +	if (ret < 0) {
> +		goto eusrfmt;
> +	} else {

You don't need this "else" here. Just put pad_idx declaration under 
"#ifdef" above.

> +		int pad_idx;
> +
> +		for (pad_idx = 0; pad_idx < sd->entity.num_pads; pad_idx++)
> +			if (sd->entity.pads[pad_idx].flags
> +					== MEDIA_PAD_FL_SOURCE)
> +				break;
> +		if (pad_idx >= sd->entity.num_pads)
> +			goto eusrfmt;
> +
> +		ret = media_entity_create_link(&icd->vdev->entity, 0,
> +						&sd->entity, pad_idx,
> +						MEDIA_LNK_FL_IMMUTABLE |
> +						MEDIA_LNK_FL_ENABLED);
> +		if (ret < 0)
> +			goto eusrfmt;
> +
> +		icd->src_pad_idx = pad_idx;
> +		ret = soc_camera_init_user_formats(icd);

I don't think you need soc_camera_init_user_formats() twice - under ifdef 
and outside of it. Just add "icd->src_pad_idx = -1;" in the error case 
below:

> +		if (ret < 0) {
> +			icd->src_pad_idx = -1;
> +			goto eusrfmt;
> +		}
> +	}
> +#else
>  	ret = soc_camera_init_user_formats(icd);
> +#endif
> +
>  	if (ret < 0)
>  		goto eusrfmt;
>  
> @@ -1322,6 +1357,9 @@ static int soc_camera_probe_finish(struct soc_camera_device *icd)
>  		goto evidstart;
>  
>  	/* Try to improve our guess of a reasonable window format */
> +#if defined(CONFIG_MEDIA_CONTROLLER)
> +	fmt.pad = icd->src_pad_idx;
> +#endif
>  	if (!v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt)) {
>  		icd->user_width		= mf->width;
>  		icd->user_height	= mf->height;
> @@ -1335,6 +1373,9 @@ static int soc_camera_probe_finish(struct soc_camera_device *icd)
>  evidstart:
>  	soc_camera_free_user_formats(icd);
>  eusrfmt:
> +#if defined(CONFIG_MEDIA_CONTROLLER)

+	icd->src_pad_idx = -1;

> +	media_entity_cleanup(&icd->vdev->entity);
> +#endif
>  	soc_camera_remove_device(icd);
>  
>  	return ret;

Thanks
Guennadi
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diff mbox

Patch

diff --git a/drivers/media/platform/soc_camera/Kconfig b/drivers/media/platform/soc_camera/Kconfig
index f2776cd..5c45c83 100644
--- a/drivers/media/platform/soc_camera/Kconfig
+++ b/drivers/media/platform/soc_camera/Kconfig
@@ -38,6 +38,7 @@  config VIDEO_RCAR_VIN
 	depends on VIDEO_DEV && SOC_CAMERA
 	depends on ARCH_SHMOBILE || COMPILE_TEST
 	depends on HAS_DMA
+	depends on MEDIA_CONTROLLER
 	select VIDEOBUF2_DMA_CONTIG
 	select SOC_CAMERA_SCALE_CROP
 	---help---
diff --git a/drivers/media/platform/soc_camera/rcar_vin.c b/drivers/media/platform/soc_camera/rcar_vin.c
index 16352a8..00c1034 100644
--- a/drivers/media/platform/soc_camera/rcar_vin.c
+++ b/drivers/media/platform/soc_camera/rcar_vin.c
@@ -1359,6 +1359,7 @@  static int rcar_vin_get_formats(struct soc_camera_device *icd, unsigned int idx,
 		struct device *dev = icd->parent;
 		int shift;
 
+		fmt.pad = icd->src_pad_idx;
 		ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt);
 		if (ret < 0)
 			return ret;
diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c
index d708df4..c4952c8 100644
--- a/drivers/media/platform/soc_camera/soc_camera.c
+++ b/drivers/media/platform/soc_camera/soc_camera.c
@@ -1293,6 +1293,9 @@  static int soc_camera_probe_finish(struct soc_camera_device *icd)
 		.which = V4L2_SUBDEV_FORMAT_ACTIVE,
 	};
 	struct v4l2_mbus_framefmt *mf = &fmt.format;
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	struct media_pad pad;
+#endif
 	int ret;
 
 	sd->grp_id = soc_camera_grp_id(icd);
@@ -1310,8 +1313,40 @@  static int soc_camera_probe_finish(struct soc_camera_device *icd)
 		return ret;
 	}
 
+	icd->src_pad_idx = -1;
+#if defined(CONFIG_MEDIA_CONTROLLER)
 	/* At this point client .probe() should have run already */
+	ret = media_entity_init(&icd->vdev->entity, 1, &pad, 0);
+	if (ret < 0) {
+		goto eusrfmt;
+	} else {
+		int pad_idx;
+
+		for (pad_idx = 0; pad_idx < sd->entity.num_pads; pad_idx++)
+			if (sd->entity.pads[pad_idx].flags
+					== MEDIA_PAD_FL_SOURCE)
+				break;
+		if (pad_idx >= sd->entity.num_pads)
+			goto eusrfmt;
+
+		ret = media_entity_create_link(&icd->vdev->entity, 0,
+						&sd->entity, pad_idx,
+						MEDIA_LNK_FL_IMMUTABLE |
+						MEDIA_LNK_FL_ENABLED);
+		if (ret < 0)
+			goto eusrfmt;
+
+		icd->src_pad_idx = pad_idx;
+		ret = soc_camera_init_user_formats(icd);
+		if (ret < 0) {
+			icd->src_pad_idx = -1;
+			goto eusrfmt;
+		}
+	}
+#else
 	ret = soc_camera_init_user_formats(icd);
+#endif
+
 	if (ret < 0)
 		goto eusrfmt;
 
@@ -1322,6 +1357,9 @@  static int soc_camera_probe_finish(struct soc_camera_device *icd)
 		goto evidstart;
 
 	/* Try to improve our guess of a reasonable window format */
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	fmt.pad = icd->src_pad_idx;
+#endif
 	if (!v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt)) {
 		icd->user_width		= mf->width;
 		icd->user_height	= mf->height;
@@ -1335,6 +1373,9 @@  static int soc_camera_probe_finish(struct soc_camera_device *icd)
 evidstart:
 	soc_camera_free_user_formats(icd);
 eusrfmt:
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	media_entity_cleanup(&icd->vdev->entity);
+#endif
 	soc_camera_remove_device(icd);
 
 	return ret;
@@ -1856,6 +1897,11 @@  static int soc_camera_remove(struct soc_camera_device *icd)
 	if (icd->num_user_formats)
 		soc_camera_free_user_formats(icd);
 
+#if defined(CONFIG_MEDIA_CONTROLLER)
+	if (icd->vdev->entity.num_pads)
+		media_entity_cleanup(&icd->vdev->entity);
+#endif
+
 	if (icd->clk) {
 		/* For the synchronous case */
 		v4l2_clk_unregister(icd->clk);
diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h
index 2f6261f..30193cf 100644
--- a/include/media/soc_camera.h
+++ b/include/media/soc_camera.h
@@ -42,6 +42,7 @@  struct soc_camera_device {
 	unsigned char devnum;		/* Device number per host */
 	struct soc_camera_sense *sense;	/* See comment in struct definition */
 	struct video_device *vdev;
+	int src_pad_idx;		/* For media-controller drivers */
 	struct v4l2_ctrl_handler ctrl_handler;
 	const struct soc_camera_format_xlate *current_fmt;
 	struct soc_camera_format_xlate *user_formats;