LinuxTV Patchwork [4/9] media: vicodec: add struct for encoder/decoder instance

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Submitter Dafna Hirschfeld
Date Feb. 9, 2019, 1:54 p.m.
Message ID <20190209135427.20630-5-dafna3@gmail.com>
Download mbox | patch
Permalink /patch/54425/
State Superseded
Delegated to: Hans Verkuil
Headers show

Comments

Dafna Hirschfeld - Feb. 9, 2019, 1:54 p.m.
Add struct 'vicodec_dev_instance' for the fields in vicodec_dev
that have have both decoder and encoder versions.

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
---
 drivers/media/platform/vicodec/vicodec-core.c | 194 +++++++++---------
 1 file changed, 92 insertions(+), 102 deletions(-)
Hans Verkuil - Feb. 11, 2019, 8:31 a.m.
On 2/9/19 2:54 PM, Dafna Hirschfeld wrote:
> Add struct 'vicodec_dev_instance' for the fields in vicodec_dev
> that have have both decoder and encoder versions.
> 
> Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
> ---
>  drivers/media/platform/vicodec/vicodec-core.c | 194 +++++++++---------
>  1 file changed, 92 insertions(+), 102 deletions(-)
> 
> diff --git a/drivers/media/platform/vicodec/vicodec-core.c b/drivers/media/platform/vicodec/vicodec-core.c
> index 335a931fdf02..e5987229c5a3 100644
> --- a/drivers/media/platform/vicodec/vicodec-core.c
> +++ b/drivers/media/platform/vicodec/vicodec-core.c
> @@ -89,21 +89,21 @@ enum {
>  	V4L2_M2M_DST = 1,
>  };
>  
> +struct vicodec_dev_instance {
> +	struct video_device     vfd;
> +	struct mutex            mutex;
> +	spinlock_t              lock;
> +	struct v4l2_m2m_dev     *m2m_dev;
> +};
> +
>  struct vicodec_dev {
>  	struct v4l2_device	v4l2_dev;
> -	struct video_device	enc_vfd;
> -	struct video_device	dec_vfd;
> +	struct vicodec_dev_instance stateful_enc;
> +	struct vicodec_dev_instance stateful_dec;
>  #ifdef CONFIG_MEDIA_CONTROLLER
>  	struct media_device	mdev;
>  #endif
>  
> -	struct mutex		enc_mutex;
> -	struct mutex		dec_mutex;
> -	spinlock_t		enc_lock;
> -	spinlock_t		dec_lock;
> -
> -	struct v4l2_m2m_dev	*enc_dev;
> -	struct v4l2_m2m_dev	*dec_dev;
>  };
>  
>  struct vicodec_ctx {
> @@ -312,9 +312,9 @@ static void device_run(void *priv)
>  	spin_unlock(ctx->lock);
>  
>  	if (ctx->is_enc)
> -		v4l2_m2m_job_finish(dev->enc_dev, ctx->fh.m2m_ctx);
> +		v4l2_m2m_job_finish(dev->stateful_enc.m2m_dev, ctx->fh.m2m_ctx);
>  	else
> -		v4l2_m2m_job_finish(dev->dec_dev, ctx->fh.m2m_ctx);
> +		v4l2_m2m_job_finish(dev->stateful_dec.m2m_dev, ctx->fh.m2m_ctx);
>  }
>  
>  static void job_remove_src_buf(struct vicodec_ctx *ctx, u32 state)
> @@ -1457,9 +1457,8 @@ static int queue_init(void *priv, struct vb2_queue *src_vq,
>  	src_vq->ops = &vicodec_qops;
>  	src_vq->mem_ops = &vb2_vmalloc_memops;
>  	src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
> -	src_vq->lock = ctx->is_enc ? &ctx->dev->enc_mutex :
> -		&ctx->dev->dec_mutex;
> -
> +	src_vq->lock = ctx->is_enc ? &ctx->dev->stateful_enc.mutex :
> +		&ctx->dev->stateful_dec.mutex;
>  	ret = vb2_queue_init(src_vq);
>  	if (ret)
>  		return ret;
> @@ -1547,7 +1546,7 @@ static int vicodec_open(struct file *file)
>  		goto open_unlock;
>  	}
>  
> -	if (vfd == &dev->enc_vfd)
> +	if (vfd == &dev->stateful_enc.vfd)
>  		ctx->is_enc = true;
>  
>  	v4l2_fh_init(&ctx->fh, video_devdata(file));
> @@ -1595,13 +1594,13 @@ static int vicodec_open(struct file *file)
>  	ctx->state.colorspace = V4L2_COLORSPACE_REC709;
>  
>  	if (ctx->is_enc) {
> -		ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->enc_dev, ctx,
> -						    &queue_init);
> -		ctx->lock = &dev->enc_lock;
> +		ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->stateful_enc.m2m_dev,
> +						    ctx, &queue_init);
> +		ctx->lock = &dev->stateful_enc.lock;
>  	} else {
> -		ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->dec_dev, ctx,
> -						    &queue_init);
> -		ctx->lock = &dev->dec_lock;
> +		ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->stateful_dec.m2m_dev,
> +						    ctx, &queue_init);
> +		ctx->lock = &dev->stateful_dec.lock;
>  	}
>  
>  	if (IS_ERR(ctx->fh.m2m_ctx)) {
> @@ -1659,19 +1658,57 @@ static const struct v4l2_m2m_ops m2m_ops = {
>  	.job_ready	= job_ready,
>  };
>  
> +static int register_instance(struct vicodec_dev *dev,
> +			     struct vicodec_dev_instance *dev_instance,
> +			     const char *name, bool is_enc)
> +{
> +	struct video_device *vfd;
> +	int ret;
> +
> +	spin_lock_init(&dev_instance->lock);
> +	mutex_init(&dev_instance->mutex);
> +	dev_instance->m2m_dev = v4l2_m2m_init(&m2m_ops);
> +	if (IS_ERR(dev_instance->m2m_dev)) {
> +		v4l2_err(&dev->v4l2_dev, "Failed to init vicodec enc device\n");
> +		return PTR_ERR(dev_instance->m2m_dev);
> +	}
> +
> +	dev_instance->vfd = vicodec_videodev;
> +	vfd = &dev_instance->vfd;
> +	vfd->lock = &dev_instance->mutex;
> +	vfd->v4l2_dev = &dev->v4l2_dev;
> +	strscpy(vfd->name, name, sizeof(vfd->name));
> +	vfd->device_caps = V4L2_CAP_STREAMING |
> +		(multiplanar ? V4L2_CAP_VIDEO_M2M_MPLANE : V4L2_CAP_VIDEO_M2M);
> +	if (is_enc) {
> +		v4l2_disable_ioctl(vfd, VIDIOC_DECODER_CMD);
> +		v4l2_disable_ioctl(vfd, VIDIOC_TRY_DECODER_CMD);
> +	} else {
> +		v4l2_disable_ioctl(vfd, VIDIOC_ENCODER_CMD);
> +		v4l2_disable_ioctl(vfd, VIDIOC_TRY_ENCODER_CMD);
> +	}
> +	video_set_drvdata(vfd, dev);
> +
> +	ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
> +	if (ret) {
> +		v4l2_err(&dev->v4l2_dev, "Failed to register video device '%s'\n", name);
> +		v4l2_m2m_release(dev_instance->m2m_dev);
> +		return ret;
> +	}
> +	v4l2_info(&dev->v4l2_dev, "Device '%s' registered as /dev/video%d\n",
> +		  name, vfd->num);
> +	return 0;
> +}
> +
>  static int vicodec_probe(struct platform_device *pdev)
>  {
>  	struct vicodec_dev *dev;
> -	struct video_device *vfd;
>  	int ret;
>  
>  	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
>  	if (!dev)
>  		return -ENOMEM;
>  
> -	spin_lock_init(&dev->enc_lock);
> -	spin_lock_init(&dev->dec_lock);
> -
>  	ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
>  	if (ret)
>  		return ret;
> @@ -1685,100 +1722,53 @@ static int vicodec_probe(struct platform_device *pdev)
>  	dev->v4l2_dev.mdev = &dev->mdev;
>  #endif
>  
> -	mutex_init(&dev->enc_mutex);
> -	mutex_init(&dev->dec_mutex);
> -
>  	platform_set_drvdata(pdev, dev);
>  
> -	dev->enc_dev = v4l2_m2m_init(&m2m_ops);
> -	if (IS_ERR(dev->enc_dev)) {
> -		v4l2_err(&dev->v4l2_dev, "Failed to init vicodec device\n");
> -		ret = PTR_ERR(dev->enc_dev);
> +	if (register_instance(dev, &dev->stateful_enc,
> +			      "videdev-enc", true))

I'd rename videdev-enc to "stateful-encoder".

>  		goto unreg_dev;
> -	}
> -
> -	dev->dec_dev = v4l2_m2m_init(&m2m_ops);
> -	if (IS_ERR(dev->dec_dev)) {
> -		v4l2_err(&dev->v4l2_dev, "Failed to init vicodec device\n");
> -		ret = PTR_ERR(dev->dec_dev);
> -		goto err_enc_m2m;
> -	}
>  
> -	dev->enc_vfd = vicodec_videodev;
> -	vfd = &dev->enc_vfd;
> -	vfd->lock = &dev->enc_mutex;
> -	vfd->v4l2_dev = &dev->v4l2_dev;
> -	strscpy(vfd->name, "vicodec-enc", sizeof(vfd->name));
> -	vfd->device_caps = V4L2_CAP_STREAMING |
> -		(multiplanar ? V4L2_CAP_VIDEO_M2M_MPLANE : V4L2_CAP_VIDEO_M2M);
> -	v4l2_disable_ioctl(vfd, VIDIOC_DECODER_CMD);
> -	v4l2_disable_ioctl(vfd, VIDIOC_TRY_DECODER_CMD);
> -	video_set_drvdata(vfd, dev);
> -
> -	ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
> -	if (ret) {
> -		v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
> -		goto err_dec_m2m;
> -	}
> -	v4l2_info(&dev->v4l2_dev,
> -			"Device registered as /dev/video%d\n", vfd->num);
> -
> -	dev->dec_vfd = vicodec_videodev;
> -	vfd = &dev->dec_vfd;
> -	vfd->lock = &dev->dec_mutex;
> -	vfd->v4l2_dev = &dev->v4l2_dev;
> -	vfd->device_caps = V4L2_CAP_STREAMING |
> -		(multiplanar ? V4L2_CAP_VIDEO_M2M_MPLANE : V4L2_CAP_VIDEO_M2M);
> -	strscpy(vfd->name, "vicodec-dec", sizeof(vfd->name));
> -	v4l2_disable_ioctl(vfd, VIDIOC_ENCODER_CMD);
> -	v4l2_disable_ioctl(vfd, VIDIOC_TRY_ENCODER_CMD);
> -	video_set_drvdata(vfd, dev);
> -
> -	ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
> -	if (ret) {
> -		v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
> -		goto unreg_enc;
> -	}
> -	v4l2_info(&dev->v4l2_dev,
> -			"Device registered as /dev/video%d\n", vfd->num);
> +	if (register_instance(dev, &dev->stateful_dec,
> +			      "videdev-statefull-dec", false))

And this to "stateful-decoder".

> +		goto unreg_sf_enc;
>  
>  #ifdef CONFIG_MEDIA_CONTROLLER
> -	ret = v4l2_m2m_register_media_controller(dev->enc_dev,
> -			&dev->enc_vfd, MEDIA_ENT_F_PROC_VIDEO_ENCODER);
> +	ret = v4l2_m2m_register_media_controller(dev->stateful_enc.m2m_dev,
> +						 &dev->stateful_enc.vfd,
> +						 MEDIA_ENT_F_PROC_VIDEO_ENCODER);
>  	if (ret) {
> -		v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller\n");
> +		v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller for enc\n");
>  		goto unreg_m2m;
>  	}
>  
> -	ret = v4l2_m2m_register_media_controller(dev->dec_dev,
> -			&dev->dec_vfd, MEDIA_ENT_F_PROC_VIDEO_DECODER);
> +	ret = v4l2_m2m_register_media_controller(dev->stateful_dec.m2m_dev,
> +						 &dev->stateful_dec.vfd,
> +						 MEDIA_ENT_F_PROC_VIDEO_DECODER);
>  	if (ret) {
> -		v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller\n");
> -		goto unreg_m2m_enc_mc;
> +		v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller for dec\n");
> +		goto unreg_m2m_sf_enc_mc;
>  	}
>  
>  	ret = media_device_register(&dev->mdev);
>  	if (ret) {
>  		v4l2_err(&dev->v4l2_dev, "Failed to register mem2mem media device\n");
> -		goto unreg_m2m_dec_mc;
> +		goto unreg_m2m_sf_dec_mc;
>  	}
>  #endif
>  	return 0;
>  
>  #ifdef CONFIG_MEDIA_CONTROLLER
> -unreg_m2m_dec_mc:
> -	v4l2_m2m_unregister_media_controller(dev->dec_dev);
> -unreg_m2m_enc_mc:
> -	v4l2_m2m_unregister_media_controller(dev->enc_dev);
> +unreg_m2m_sf_dec_mc:
> +	v4l2_m2m_unregister_media_controller(dev->stateful_dec.m2m_dev);
> +unreg_m2m_sf_enc_mc:
> +	v4l2_m2m_unregister_media_controller(dev->stateful_enc.m2m_dev);
>  unreg_m2m:
> -	video_unregister_device(&dev->dec_vfd);
> +	video_unregister_device(&dev->stateful_dec.vfd);
> +	v4l2_m2m_release(dev->stateful_dec.m2m_dev);
>  #endif
> -unreg_enc:
> -	video_unregister_device(&dev->enc_vfd);
> -err_dec_m2m:
> -	v4l2_m2m_release(dev->dec_dev);
> -err_enc_m2m:
> -	v4l2_m2m_release(dev->enc_dev);
> +unreg_sf_enc:
> +	video_unregister_device(&dev->stateful_enc.vfd);
> +	v4l2_m2m_release(dev->stateful_enc.m2m_dev);
>  unreg_dev:
>  	v4l2_device_unregister(&dev->v4l2_dev);
>  
> @@ -1793,15 +1783,15 @@ static int vicodec_remove(struct platform_device *pdev)
>  
>  #ifdef CONFIG_MEDIA_CONTROLLER
>  	media_device_unregister(&dev->mdev);
> -	v4l2_m2m_unregister_media_controller(dev->enc_dev);
> -	v4l2_m2m_unregister_media_controller(dev->dec_dev);
> +	v4l2_m2m_unregister_media_controller(dev->stateful_enc.m2m_dev);
> +	v4l2_m2m_unregister_media_controller(dev->stateful_dec.m2m_dev);
>  	media_device_cleanup(&dev->mdev);
>  #endif
>  
> -	v4l2_m2m_release(dev->enc_dev);
> -	v4l2_m2m_release(dev->dec_dev);
> -	video_unregister_device(&dev->enc_vfd);
> -	video_unregister_device(&dev->dec_vfd);
> +	v4l2_m2m_release(dev->stateful_enc.m2m_dev);
> +	v4l2_m2m_release(dev->stateful_dec.m2m_dev);
> +	video_unregister_device(&dev->stateful_enc.vfd);
> +	video_unregister_device(&dev->stateful_dec.vfd);
>  	v4l2_device_unregister(&dev->v4l2_dev);
>  
>  	return 0;
> 

Regards,

	Hans

Patch

diff --git a/drivers/media/platform/vicodec/vicodec-core.c b/drivers/media/platform/vicodec/vicodec-core.c
index 335a931fdf02..e5987229c5a3 100644
--- a/drivers/media/platform/vicodec/vicodec-core.c
+++ b/drivers/media/platform/vicodec/vicodec-core.c
@@ -89,21 +89,21 @@  enum {
 	V4L2_M2M_DST = 1,
 };
 
+struct vicodec_dev_instance {
+	struct video_device     vfd;
+	struct mutex            mutex;
+	spinlock_t              lock;
+	struct v4l2_m2m_dev     *m2m_dev;
+};
+
 struct vicodec_dev {
 	struct v4l2_device	v4l2_dev;
-	struct video_device	enc_vfd;
-	struct video_device	dec_vfd;
+	struct vicodec_dev_instance stateful_enc;
+	struct vicodec_dev_instance stateful_dec;
 #ifdef CONFIG_MEDIA_CONTROLLER
 	struct media_device	mdev;
 #endif
 
-	struct mutex		enc_mutex;
-	struct mutex		dec_mutex;
-	spinlock_t		enc_lock;
-	spinlock_t		dec_lock;
-
-	struct v4l2_m2m_dev	*enc_dev;
-	struct v4l2_m2m_dev	*dec_dev;
 };
 
 struct vicodec_ctx {
@@ -312,9 +312,9 @@  static void device_run(void *priv)
 	spin_unlock(ctx->lock);
 
 	if (ctx->is_enc)
-		v4l2_m2m_job_finish(dev->enc_dev, ctx->fh.m2m_ctx);
+		v4l2_m2m_job_finish(dev->stateful_enc.m2m_dev, ctx->fh.m2m_ctx);
 	else
-		v4l2_m2m_job_finish(dev->dec_dev, ctx->fh.m2m_ctx);
+		v4l2_m2m_job_finish(dev->stateful_dec.m2m_dev, ctx->fh.m2m_ctx);
 }
 
 static void job_remove_src_buf(struct vicodec_ctx *ctx, u32 state)
@@ -1457,9 +1457,8 @@  static int queue_init(void *priv, struct vb2_queue *src_vq,
 	src_vq->ops = &vicodec_qops;
 	src_vq->mem_ops = &vb2_vmalloc_memops;
 	src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
-	src_vq->lock = ctx->is_enc ? &ctx->dev->enc_mutex :
-		&ctx->dev->dec_mutex;
-
+	src_vq->lock = ctx->is_enc ? &ctx->dev->stateful_enc.mutex :
+		&ctx->dev->stateful_dec.mutex;
 	ret = vb2_queue_init(src_vq);
 	if (ret)
 		return ret;
@@ -1547,7 +1546,7 @@  static int vicodec_open(struct file *file)
 		goto open_unlock;
 	}
 
-	if (vfd == &dev->enc_vfd)
+	if (vfd == &dev->stateful_enc.vfd)
 		ctx->is_enc = true;
 
 	v4l2_fh_init(&ctx->fh, video_devdata(file));
@@ -1595,13 +1594,13 @@  static int vicodec_open(struct file *file)
 	ctx->state.colorspace = V4L2_COLORSPACE_REC709;
 
 	if (ctx->is_enc) {
-		ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->enc_dev, ctx,
-						    &queue_init);
-		ctx->lock = &dev->enc_lock;
+		ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->stateful_enc.m2m_dev,
+						    ctx, &queue_init);
+		ctx->lock = &dev->stateful_enc.lock;
 	} else {
-		ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->dec_dev, ctx,
-						    &queue_init);
-		ctx->lock = &dev->dec_lock;
+		ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(dev->stateful_dec.m2m_dev,
+						    ctx, &queue_init);
+		ctx->lock = &dev->stateful_dec.lock;
 	}
 
 	if (IS_ERR(ctx->fh.m2m_ctx)) {
@@ -1659,19 +1658,57 @@  static const struct v4l2_m2m_ops m2m_ops = {
 	.job_ready	= job_ready,
 };
 
+static int register_instance(struct vicodec_dev *dev,
+			     struct vicodec_dev_instance *dev_instance,
+			     const char *name, bool is_enc)
+{
+	struct video_device *vfd;
+	int ret;
+
+	spin_lock_init(&dev_instance->lock);
+	mutex_init(&dev_instance->mutex);
+	dev_instance->m2m_dev = v4l2_m2m_init(&m2m_ops);
+	if (IS_ERR(dev_instance->m2m_dev)) {
+		v4l2_err(&dev->v4l2_dev, "Failed to init vicodec enc device\n");
+		return PTR_ERR(dev_instance->m2m_dev);
+	}
+
+	dev_instance->vfd = vicodec_videodev;
+	vfd = &dev_instance->vfd;
+	vfd->lock = &dev_instance->mutex;
+	vfd->v4l2_dev = &dev->v4l2_dev;
+	strscpy(vfd->name, name, sizeof(vfd->name));
+	vfd->device_caps = V4L2_CAP_STREAMING |
+		(multiplanar ? V4L2_CAP_VIDEO_M2M_MPLANE : V4L2_CAP_VIDEO_M2M);
+	if (is_enc) {
+		v4l2_disable_ioctl(vfd, VIDIOC_DECODER_CMD);
+		v4l2_disable_ioctl(vfd, VIDIOC_TRY_DECODER_CMD);
+	} else {
+		v4l2_disable_ioctl(vfd, VIDIOC_ENCODER_CMD);
+		v4l2_disable_ioctl(vfd, VIDIOC_TRY_ENCODER_CMD);
+	}
+	video_set_drvdata(vfd, dev);
+
+	ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
+	if (ret) {
+		v4l2_err(&dev->v4l2_dev, "Failed to register video device '%s'\n", name);
+		v4l2_m2m_release(dev_instance->m2m_dev);
+		return ret;
+	}
+	v4l2_info(&dev->v4l2_dev, "Device '%s' registered as /dev/video%d\n",
+		  name, vfd->num);
+	return 0;
+}
+
 static int vicodec_probe(struct platform_device *pdev)
 {
 	struct vicodec_dev *dev;
-	struct video_device *vfd;
 	int ret;
 
 	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
 	if (!dev)
 		return -ENOMEM;
 
-	spin_lock_init(&dev->enc_lock);
-	spin_lock_init(&dev->dec_lock);
-
 	ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
 	if (ret)
 		return ret;
@@ -1685,100 +1722,53 @@  static int vicodec_probe(struct platform_device *pdev)
 	dev->v4l2_dev.mdev = &dev->mdev;
 #endif
 
-	mutex_init(&dev->enc_mutex);
-	mutex_init(&dev->dec_mutex);
-
 	platform_set_drvdata(pdev, dev);
 
-	dev->enc_dev = v4l2_m2m_init(&m2m_ops);
-	if (IS_ERR(dev->enc_dev)) {
-		v4l2_err(&dev->v4l2_dev, "Failed to init vicodec device\n");
-		ret = PTR_ERR(dev->enc_dev);
+	if (register_instance(dev, &dev->stateful_enc,
+			      "videdev-enc", true))
 		goto unreg_dev;
-	}
-
-	dev->dec_dev = v4l2_m2m_init(&m2m_ops);
-	if (IS_ERR(dev->dec_dev)) {
-		v4l2_err(&dev->v4l2_dev, "Failed to init vicodec device\n");
-		ret = PTR_ERR(dev->dec_dev);
-		goto err_enc_m2m;
-	}
 
-	dev->enc_vfd = vicodec_videodev;
-	vfd = &dev->enc_vfd;
-	vfd->lock = &dev->enc_mutex;
-	vfd->v4l2_dev = &dev->v4l2_dev;
-	strscpy(vfd->name, "vicodec-enc", sizeof(vfd->name));
-	vfd->device_caps = V4L2_CAP_STREAMING |
-		(multiplanar ? V4L2_CAP_VIDEO_M2M_MPLANE : V4L2_CAP_VIDEO_M2M);
-	v4l2_disable_ioctl(vfd, VIDIOC_DECODER_CMD);
-	v4l2_disable_ioctl(vfd, VIDIOC_TRY_DECODER_CMD);
-	video_set_drvdata(vfd, dev);
-
-	ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
-	if (ret) {
-		v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
-		goto err_dec_m2m;
-	}
-	v4l2_info(&dev->v4l2_dev,
-			"Device registered as /dev/video%d\n", vfd->num);
-
-	dev->dec_vfd = vicodec_videodev;
-	vfd = &dev->dec_vfd;
-	vfd->lock = &dev->dec_mutex;
-	vfd->v4l2_dev = &dev->v4l2_dev;
-	vfd->device_caps = V4L2_CAP_STREAMING |
-		(multiplanar ? V4L2_CAP_VIDEO_M2M_MPLANE : V4L2_CAP_VIDEO_M2M);
-	strscpy(vfd->name, "vicodec-dec", sizeof(vfd->name));
-	v4l2_disable_ioctl(vfd, VIDIOC_ENCODER_CMD);
-	v4l2_disable_ioctl(vfd, VIDIOC_TRY_ENCODER_CMD);
-	video_set_drvdata(vfd, dev);
-
-	ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
-	if (ret) {
-		v4l2_err(&dev->v4l2_dev, "Failed to register video device\n");
-		goto unreg_enc;
-	}
-	v4l2_info(&dev->v4l2_dev,
-			"Device registered as /dev/video%d\n", vfd->num);
+	if (register_instance(dev, &dev->stateful_dec,
+			      "videdev-statefull-dec", false))
+		goto unreg_sf_enc;
 
 #ifdef CONFIG_MEDIA_CONTROLLER
-	ret = v4l2_m2m_register_media_controller(dev->enc_dev,
-			&dev->enc_vfd, MEDIA_ENT_F_PROC_VIDEO_ENCODER);
+	ret = v4l2_m2m_register_media_controller(dev->stateful_enc.m2m_dev,
+						 &dev->stateful_enc.vfd,
+						 MEDIA_ENT_F_PROC_VIDEO_ENCODER);
 	if (ret) {
-		v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller\n");
+		v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller for enc\n");
 		goto unreg_m2m;
 	}
 
-	ret = v4l2_m2m_register_media_controller(dev->dec_dev,
-			&dev->dec_vfd, MEDIA_ENT_F_PROC_VIDEO_DECODER);
+	ret = v4l2_m2m_register_media_controller(dev->stateful_dec.m2m_dev,
+						 &dev->stateful_dec.vfd,
+						 MEDIA_ENT_F_PROC_VIDEO_DECODER);
 	if (ret) {
-		v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller\n");
-		goto unreg_m2m_enc_mc;
+		v4l2_err(&dev->v4l2_dev, "Failed to init mem2mem media controller for dec\n");
+		goto unreg_m2m_sf_enc_mc;
 	}
 
 	ret = media_device_register(&dev->mdev);
 	if (ret) {
 		v4l2_err(&dev->v4l2_dev, "Failed to register mem2mem media device\n");
-		goto unreg_m2m_dec_mc;
+		goto unreg_m2m_sf_dec_mc;
 	}
 #endif
 	return 0;
 
 #ifdef CONFIG_MEDIA_CONTROLLER
-unreg_m2m_dec_mc:
-	v4l2_m2m_unregister_media_controller(dev->dec_dev);
-unreg_m2m_enc_mc:
-	v4l2_m2m_unregister_media_controller(dev->enc_dev);
+unreg_m2m_sf_dec_mc:
+	v4l2_m2m_unregister_media_controller(dev->stateful_dec.m2m_dev);
+unreg_m2m_sf_enc_mc:
+	v4l2_m2m_unregister_media_controller(dev->stateful_enc.m2m_dev);
 unreg_m2m:
-	video_unregister_device(&dev->dec_vfd);
+	video_unregister_device(&dev->stateful_dec.vfd);
+	v4l2_m2m_release(dev->stateful_dec.m2m_dev);
 #endif
-unreg_enc:
-	video_unregister_device(&dev->enc_vfd);
-err_dec_m2m:
-	v4l2_m2m_release(dev->dec_dev);
-err_enc_m2m:
-	v4l2_m2m_release(dev->enc_dev);
+unreg_sf_enc:
+	video_unregister_device(&dev->stateful_enc.vfd);
+	v4l2_m2m_release(dev->stateful_enc.m2m_dev);
 unreg_dev:
 	v4l2_device_unregister(&dev->v4l2_dev);
 
@@ -1793,15 +1783,15 @@  static int vicodec_remove(struct platform_device *pdev)
 
 #ifdef CONFIG_MEDIA_CONTROLLER
 	media_device_unregister(&dev->mdev);
-	v4l2_m2m_unregister_media_controller(dev->enc_dev);
-	v4l2_m2m_unregister_media_controller(dev->dec_dev);
+	v4l2_m2m_unregister_media_controller(dev->stateful_enc.m2m_dev);
+	v4l2_m2m_unregister_media_controller(dev->stateful_dec.m2m_dev);
 	media_device_cleanup(&dev->mdev);
 #endif
 
-	v4l2_m2m_release(dev->enc_dev);
-	v4l2_m2m_release(dev->dec_dev);
-	video_unregister_device(&dev->enc_vfd);
-	video_unregister_device(&dev->dec_vfd);
+	v4l2_m2m_release(dev->stateful_enc.m2m_dev);
+	v4l2_m2m_release(dev->stateful_dec.m2m_dev);
+	video_unregister_device(&dev->stateful_enc.vfd);
+	video_unregister_device(&dev->stateful_dec.vfd);
 	v4l2_device_unregister(&dev->v4l2_dev);
 
 	return 0;

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