media: m2m-deinterlace: use struct v4l2_fh

Convert this driver to use struct v4l2_fh and as a result switch to
using vb2/v4l2_mem2mem helper functions as well.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/m2m-deinterlace.c

@@ -132,13 +132,13 @@ struct deinterlace_dev {
 };
 
 struct deinterlace_ctx {
+	struct v4l2_fh		fh;
 	struct deinterlace_dev	*dev;
 
 	/* Abort requested by m2m */
 	int			aborting;
 	enum v4l2_colorspace	colorspace;
 	dma_cookie_t		cookie;
-	struct v4l2_m2m_ctx	*m2m_ctx;
 	struct dma_interleaved_template *xt;
 };
 
@@ -150,9 +150,9 @@ static int deinterlace_job_ready(void *priv)
 	struct deinterlace_ctx *ctx = priv;
 	struct deinterlace_dev *pcdev = ctx->dev;
 
-	if ((v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) > 0)
-	    && (v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) > 0)
-	    && (atomic_read(&ctx->dev->busy) == 0)) {
+	if (v4l2_m2m_num_src_bufs_ready(ctx->fh.m2m_ctx) > 0 &&
+	    v4l2_m2m_num_dst_bufs_ready(ctx->fh.m2m_ctx) > 0 &&
+	    !atomic_read(&ctx->dev->busy)) {
 		dprintk(pcdev, "Task ready\n");
 		return 1;
 	}
@@ -171,7 +171,7 @@ static void deinterlace_job_abort(void *priv)
 
 	dprintk(pcdev, "Aborting task\n");
 
-	v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx);
+	v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->fh.m2m_ctx);
 }
 
 static void dma_callback(void *data)
@@ -182,8 +182,8 @@ static void dma_callback(void *data)
 
 	atomic_set(&pcdev->busy, 0);
 
-	src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
-	dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
+	src_vb = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);
+	dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);
 
 	dst_vb->vb2_buf.timestamp = src_vb->vb2_buf.timestamp;
 	dst_vb->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
@@ -194,7 +194,7 @@ static void dma_callback(void *data)
 	v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
 	v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
 
-	v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
+	v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->fh.m2m_ctx);
 
 	dprintk(pcdev, "dma transfers completed.\n");
 }
@@ -213,8 +213,8 @@ static void deinterlace_issue_dma(struct deinterlace_ctx *ctx, int op,
 	dma_addr_t p_in, p_out;
 	enum dma_ctrl_flags flags;
 
-	src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
-	dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
+	src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
+	dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
 
 	s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
 	s_width	= s_q_data->width;
@@ -483,7 +483,7 @@ static int vidioc_g_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
 	struct vb2_queue *vq;
 	struct deinterlace_q_data *q_data;
 
-	vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
+	vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
 	if (!vq)
 		return -EINVAL;
 
@@ -580,7 +580,7 @@ static int vidioc_s_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
 	struct deinterlace_q_data *q_data;
 	struct vb2_queue *vq;
 
-	vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
+	vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type);
 	if (!vq)
 		return -EINVAL;
 
@@ -653,36 +653,6 @@ static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
 	return ret;
 }
 
-static int vidioc_reqbufs(struct file *file, void *priv,
-			  struct v4l2_requestbuffers *reqbufs)
-{
-	struct deinterlace_ctx *ctx = priv;
-
-	return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
-}
-
-static int vidioc_querybuf(struct file *file, void *priv,
-			   struct v4l2_buffer *buf)
-{
-	struct deinterlace_ctx *ctx = priv;
-
-	return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
-}
-
-static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
-{
-	struct deinterlace_ctx *ctx = priv;
-
-	return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
-}
-
-static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
-{
-	struct deinterlace_ctx *ctx = priv;
-
-	return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
-}
-
 static int vidioc_streamon(struct file *file, void *priv,
 			   enum v4l2_buf_type type)
 {
@@ -723,15 +693,7 @@ static int vidioc_streamon(struct file *file, void *priv,
 		return -EINVAL;
 	}
 
-	return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
-}
-
-static int vidioc_streamoff(struct file *file, void *priv,
-			    enum v4l2_buf_type type)
-{
-	struct deinterlace_ctx *ctx = priv;
-
-	return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
+	return v4l2_m2m_streamon(file, ctx->fh.m2m_ctx, type);
 }
 
 static const struct v4l2_ioctl_ops deinterlace_ioctl_ops = {
@@ -747,14 +709,15 @@ static const struct v4l2_ioctl_ops deinterlace_ioctl_ops = {
 	.vidioc_try_fmt_vid_out	= vidioc_try_fmt_vid_out,
 	.vidioc_s_fmt_vid_out	= vidioc_s_fmt_vid_out,
 
-	.vidioc_reqbufs		= vidioc_reqbufs,
-	.vidioc_querybuf	= vidioc_querybuf,
-
-	.vidioc_qbuf		= vidioc_qbuf,
-	.vidioc_dqbuf		= vidioc_dqbuf,
+	.vidioc_reqbufs		= v4l2_m2m_ioctl_reqbufs,
+	.vidioc_querybuf	= v4l2_m2m_ioctl_querybuf,
+	.vidioc_qbuf		= v4l2_m2m_ioctl_qbuf,
+	.vidioc_dqbuf		= v4l2_m2m_ioctl_dqbuf,
+	.vidioc_prepare_buf	= v4l2_m2m_ioctl_prepare_buf,
+	.vidioc_expbuf		= v4l2_m2m_ioctl_expbuf,
 
 	.vidioc_streamon	= vidioc_streamon,
-	.vidioc_streamoff	= vidioc_streamoff,
+	.vidioc_streamoff	= v4l2_m2m_ioctl_streamoff,
 };
 
 
@@ -818,7 +781,7 @@ static void deinterlace_buf_queue(struct vb2_buffer *vb)
 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 	struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
 
-	v4l2_m2m_buf_queue(ctx->m2m_ctx, vbuf);
+	v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
 }
 
 static const struct vb2_ops deinterlace_qops = {
@@ -836,7 +799,7 @@ static int queue_init(void *priv, struct vb2_queue *src_vq,
 	int ret;
 
 	src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
-	src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
+	src_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
 	src_vq->drv_priv = ctx;
 	src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
 	src_vq->ops = &deinterlace_qops;
@@ -855,7 +818,7 @@ static int queue_init(void *priv, struct vb2_queue *src_vq,
 		return ret;
 
 	dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
-	dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
+	dst_vq->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
 	dst_vq->drv_priv = ctx;
 	dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
 	dst_vq->ops = &deinterlace_qops;
@@ -884,12 +847,13 @@ static int deinterlace_open(struct file *file)
 	if (!ctx)
 		return -ENOMEM;
 
-	file->private_data = ctx;
+	v4l2_fh_init(&ctx->fh, video_devdata(file));
+	file->private_data = &ctx->fh;
 	ctx->dev = pcdev;
 
-	ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
-	if (IS_ERR(ctx->m2m_ctx)) {
-		int ret = PTR_ERR(ctx->m2m_ctx);
+	ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
+	if (IS_ERR(ctx->fh.m2m_ctx)) {
+		int ret = PTR_ERR(ctx->fh.m2m_ctx);
 
 		kfree(ctx);
 		return ret;
@@ -903,8 +867,10 @@ static int deinterlace_open(struct file *file)
 	}
 
 	ctx->colorspace = V4L2_COLORSPACE_REC709;
+	v4l2_fh_add(&ctx->fh);
 
-	dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
+	dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n",
+		ctx, ctx->fh.m2m_ctx);
 
 	return 0;
 }
@@ -916,40 +882,22 @@ static int deinterlace_release(struct file *file)
 
 	dprintk(pcdev, "Releasing instance %p\n", ctx);
 
-	v4l2_m2m_ctx_release(ctx->m2m_ctx);
+	v4l2_fh_del(&ctx->fh);
+	v4l2_fh_exit(&ctx->fh);
+	v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
 	kfree(ctx->xt);
 	kfree(ctx);
 
 	return 0;
 }
 
-static __poll_t deinterlace_poll(struct file *file,
-				 struct poll_table_struct *wait)
-{
-	struct deinterlace_ctx *ctx = file->private_data;
-	__poll_t ret;
-
-	mutex_lock(&ctx->dev->dev_mutex);
-	ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
-	mutex_unlock(&ctx->dev->dev_mutex);
-
-	return ret;
-}
-
-static int deinterlace_mmap(struct file *file, struct vm_area_struct *vma)
-{
-	struct deinterlace_ctx *ctx = file->private_data;
-
-	return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
-}
-
 static const struct v4l2_file_operations deinterlace_fops = {
 	.owner		= THIS_MODULE,
 	.open		= deinterlace_open,
 	.release	= deinterlace_release,
-	.poll		= deinterlace_poll,
+	.poll		= v4l2_m2m_fop_poll,
 	.unlocked_ioctl	= video_ioctl2,
-	.mmap		= deinterlace_mmap,
+	.mmap		= v4l2_m2m_fop_mmap,
 };
 
 static const struct video_device deinterlace_videodev = {