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From: Benjamin Gaignard <benjamin.gaignard@collabora.com>
To: hverkuil@xs4all.nl,
	mchehab@kernel.org
Cc: linux-kernel@vger.kernel.org,
	linux-media@vger.kernel.org,
	kernel@collabora.com,
	Benjamin Gaignard <benjamin.gaignard@collabora.com>
Subject: [PATCH v17 7/8] media: v4l2: Add mem2mem helpers for DELETE_BUFS ioctl
Date: Fri, 19 Jan 2024 10:49:43 +0100
Message-Id: <20240119094944.26763-8-benjamin.gaignard@collabora.com>
In-Reply-To: <20240119094944.26763-1-benjamin.gaignard@collabora.com>
References: <20240119094944.26763-1-benjamin.gaignard@collabora.com>
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Create v4l2-mem2mem helpers for VIDIOC_DELETE_BUFS ioctl and
make test drivers use it.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
---
version 17:
- change all test drivers in this patch.
- v4l2_m2m_delete_bufs() is now a static function.

 drivers/media/test-drivers/vicodec/vicodec-core.c |  2 ++
 drivers/media/test-drivers/vim2m.c                |  2 ++
 drivers/media/test-drivers/vimc/vimc-capture.c    |  2 ++
 drivers/media/test-drivers/visl/visl-video.c      |  2 ++
 drivers/media/test-drivers/vivid/vivid-core.c     | 13 ++++++++++---
 drivers/media/v4l2-core/v4l2-mem2mem.c            | 15 +++++++++++++++
 include/media/v4l2-mem2mem.h                      |  2 ++
 7 files changed, 35 insertions(+), 3 deletions(-)

diff --git a/drivers/media/test-drivers/vicodec/vicodec-core.c b/drivers/media/test-drivers/vicodec/vicodec-core.c
index e13f5452b927..12956d807e05 100644
--- a/drivers/media/test-drivers/vicodec/vicodec-core.c
+++ b/drivers/media/test-drivers/vicodec/vicodec-core.c
@@ -1345,6 +1345,7 @@ static const struct v4l2_ioctl_ops vicodec_ioctl_ops = {
 	.vidioc_prepare_buf	= v4l2_m2m_ioctl_prepare_buf,
 	.vidioc_create_bufs	= v4l2_m2m_ioctl_create_bufs,
 	.vidioc_expbuf		= v4l2_m2m_ioctl_expbuf,
+	.vidioc_delete_bufs	= v4l2_m2m_ioctl_delete_bufs,
 
 	.vidioc_streamon	= v4l2_m2m_ioctl_streamon,
 	.vidioc_streamoff	= v4l2_m2m_ioctl_streamoff,
@@ -1731,6 +1732,7 @@ static int queue_init(void *priv, struct vb2_queue *src_vq,
 	dst_vq->mem_ops = &vb2_vmalloc_memops;
 	dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
 	dst_vq->lock = src_vq->lock;
+	dst_vq->supports_delete_bufs = true;
 
 	return vb2_queue_init(dst_vq);
 }
diff --git a/drivers/media/test-drivers/vim2m.c b/drivers/media/test-drivers/vim2m.c
index 3e3b424b4860..17213ce42059 100644
--- a/drivers/media/test-drivers/vim2m.c
+++ b/drivers/media/test-drivers/vim2m.c
@@ -960,6 +960,7 @@ static const struct v4l2_ioctl_ops vim2m_ioctl_ops = {
 	.vidioc_dqbuf		= v4l2_m2m_ioctl_dqbuf,
 	.vidioc_prepare_buf	= v4l2_m2m_ioctl_prepare_buf,
 	.vidioc_create_bufs	= v4l2_m2m_ioctl_create_bufs,
+	.vidioc_delete_bufs	= v4l2_m2m_ioctl_delete_bufs,
 	.vidioc_expbuf		= v4l2_m2m_ioctl_expbuf,
 
 	.vidioc_streamon	= v4l2_m2m_ioctl_streamon,
@@ -1133,6 +1134,7 @@ static int queue_init(void *priv, struct vb2_queue *src_vq,
 	dst_vq->mem_ops = &vb2_vmalloc_memops;
 	dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
 	dst_vq->lock = &ctx->vb_mutex;
+	dst_vq->supports_delete_bufs = true;
 
 	return vb2_queue_init(dst_vq);
 }
diff --git a/drivers/media/test-drivers/vimc/vimc-capture.c b/drivers/media/test-drivers/vimc/vimc-capture.c
index 97693561f1e4..a2078d9c2721 100644
--- a/drivers/media/test-drivers/vimc/vimc-capture.c
+++ b/drivers/media/test-drivers/vimc/vimc-capture.c
@@ -221,6 +221,7 @@ static const struct v4l2_ioctl_ops vimc_capture_ioctl_ops = {
 	.vidioc_expbuf = vb2_ioctl_expbuf,
 	.vidioc_streamon = vb2_ioctl_streamon,
 	.vidioc_streamoff = vb2_ioctl_streamoff,
+	.vidioc_delete_bufs = vb2_ioctl_delete_bufs,
 };
 
 static void vimc_capture_return_all_buffers(struct vimc_capture_device *vcapture,
@@ -435,6 +436,7 @@ static struct vimc_ent_device *vimc_capture_add(struct vimc_device *vimc,
 	q->min_reqbufs_allocation = 2;
 	q->lock = &vcapture->lock;
 	q->dev = v4l2_dev->dev;
+	q->supports_delete_bufs = true;
 
 	ret = vb2_queue_init(q);
 	if (ret) {
diff --git a/drivers/media/test-drivers/visl/visl-video.c b/drivers/media/test-drivers/visl/visl-video.c
index b9a4b44bd0ed..939c14107700 100644
--- a/drivers/media/test-drivers/visl/visl-video.c
+++ b/drivers/media/test-drivers/visl/visl-video.c
@@ -539,6 +539,7 @@ const struct v4l2_ioctl_ops visl_ioctl_ops = {
 	.vidioc_prepare_buf		= v4l2_m2m_ioctl_prepare_buf,
 	.vidioc_create_bufs		= v4l2_m2m_ioctl_create_bufs,
 	.vidioc_expbuf			= v4l2_m2m_ioctl_expbuf,
+	.vidioc_delete_bufs		= v4l2_m2m_ioctl_delete_bufs,
 
 	.vidioc_streamon		= v4l2_m2m_ioctl_streamon,
 	.vidioc_streamoff		= v4l2_m2m_ioctl_streamoff,
@@ -749,6 +750,7 @@ int visl_queue_init(void *priv, struct vb2_queue *src_vq,
 	dst_vq->mem_ops = &vb2_vmalloc_memops;
 	dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
 	dst_vq->lock = &ctx->vb_mutex;
+	dst_vq->supports_delete_bufs = true;
 
 	return vb2_queue_init(dst_vq);
 }
diff --git a/drivers/media/test-drivers/vivid/vivid-core.c b/drivers/media/test-drivers/vivid/vivid-core.c
index 11b8520d9f57..ad37babb54a2 100644
--- a/drivers/media/test-drivers/vivid/vivid-core.c
+++ b/drivers/media/test-drivers/vivid/vivid-core.c
@@ -769,6 +769,7 @@ static const struct v4l2_ioctl_ops vivid_ioctl_ops = {
 	.vidioc_expbuf			= vb2_ioctl_expbuf,
 	.vidioc_streamon		= vb2_ioctl_streamon,
 	.vidioc_streamoff		= vb2_ioctl_streamoff,
+	.vidioc_delete_bufs		= vb2_ioctl_delete_bufs,
 
 	.vidioc_enum_input		= vivid_enum_input,
 	.vidioc_g_input			= vivid_g_input,
@@ -883,12 +884,18 @@ static int vivid_create_queue(struct vivid_dev *dev,
 	 * PAGE_SHIFT > 12, but then max_num_buffers will be clamped by
 	 * videobuf2-core.c to MAX_BUFFER_INDEX.
 	 */
-	if (buf_type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
+	if (buf_type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
 		q->max_num_buffers = 64;
-	if (buf_type == V4L2_BUF_TYPE_SDR_CAPTURE)
+		q->supports_delete_bufs = true;
+	}
+	if (buf_type == V4L2_BUF_TYPE_SDR_CAPTURE) {
 		q->max_num_buffers = 1024;
-	if (buf_type == V4L2_BUF_TYPE_VBI_CAPTURE)
+		q->supports_delete_bufs = true;
+	}
+	if (buf_type == V4L2_BUF_TYPE_VBI_CAPTURE) {
 		q->max_num_buffers = 32768;
+		q->supports_delete_bufs = true;
+	}
 
 	if (allocators[dev->inst] != 1)
 		q->io_modes |= VB2_USERPTR;
diff --git a/drivers/media/v4l2-core/v4l2-mem2mem.c b/drivers/media/v4l2-core/v4l2-mem2mem.c
index 9e983176542b..6696b50329e0 100644
--- a/drivers/media/v4l2-core/v4l2-mem2mem.c
+++ b/drivers/media/v4l2-core/v4l2-mem2mem.c
@@ -834,6 +834,12 @@ int v4l2_m2m_prepare_buf(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
 }
 EXPORT_SYMBOL_GPL(v4l2_m2m_prepare_buf);
 
+static int v4l2_m2m_delete_bufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
+				struct v4l2_delete_buffers *d)
+{
+	return vb2_delete_bufs(v4l2_m2m_get_vq(m2m_ctx, d->type), d);
+}
+
 int v4l2_m2m_create_bufs(struct file *file, struct v4l2_m2m_ctx *m2m_ctx,
 			 struct v4l2_create_buffers *create)
 {
@@ -1380,6 +1386,15 @@ int v4l2_m2m_ioctl_create_bufs(struct file *file, void *priv,
 }
 EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_create_bufs);
 
+int v4l2_m2m_ioctl_delete_bufs(struct file *file, void *priv,
+			       struct v4l2_delete_buffers *d)
+{
+	struct v4l2_fh *fh = file->private_data;
+
+	return v4l2_m2m_delete_bufs(file, fh->m2m_ctx, d);
+}
+EXPORT_SYMBOL_GPL(v4l2_m2m_ioctl_delete_bufs);
+
 int v4l2_m2m_ioctl_querybuf(struct file *file, void *priv,
 				struct v4l2_buffer *buf)
 {
diff --git a/include/media/v4l2-mem2mem.h b/include/media/v4l2-mem2mem.h
index 7f1af1f7f912..402bea36093b 100644
--- a/include/media/v4l2-mem2mem.h
+++ b/include/media/v4l2-mem2mem.h
@@ -867,6 +867,8 @@ int v4l2_m2m_ioctl_reqbufs(struct file *file, void *priv,
 				struct v4l2_requestbuffers *rb);
 int v4l2_m2m_ioctl_create_bufs(struct file *file, void *fh,
 				struct v4l2_create_buffers *create);
+int v4l2_m2m_ioctl_delete_bufs(struct file *file, void *priv,
+			       struct v4l2_delete_buffers *d);
 int v4l2_m2m_ioctl_querybuf(struct file *file, void *fh,
 				struct v4l2_buffer *buf);
 int v4l2_m2m_ioctl_expbuf(struct file *file, void *fh,
-- 
2.40.1