From 7410e35a4936b89f2e227c52058c11f1574bbfca Mon Sep 17 00:00:00 2001
From: Hans Verkuil <hansverk@cisco.com>
Date: Thu, 23 Aug 2018 10:18:35 -0400
Subject: [PATCH] media: vb2: set reqbufs/create_bufs capabilities
Upstream commit e5079cf11373e4cc98be8b1072aece429eb2d4d2.
Set the capabilities field of v4l2_requestbuffers and v4l2_create_buffers.
The various mapping modes were easy, but for signaling the request capability
a new 'supports_requests' bitfield was added to videobuf2-core.h (and set in
vim2m and vivid). Drivers have to set this bitfield for any queue where
requests are supported.
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Minor modifications required on the backport
---
drivers/media/common/videobuf2/videobuf2-v4l2.c | 17 +++++++++++++++++
drivers/media/platform/vim2m.c | 1 +
drivers/media/platform/vivid/vivid-core.c | 5 +++++
drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 4 +++-
drivers/media/v4l2-core/v4l2-ioctl.c | 4 ++--
include/media/videobuf2-core.h | 2 ++
6 files changed, 30 insertions(+), 3 deletions(-)
--- a/drivers/media/common/videobuf2/videobuf2-v4l2.c
+++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c
@@ -482,10 +482,24 @@ int vb2_querybuf(struct vb2_queue *q, st
}
EXPORT_SYMBOL(vb2_querybuf);
+static void fill_buf_caps(struct vb2_queue *q, u32 *caps)
+{
+ *caps = 0;
+ if (q->io_modes & VB2_MMAP)
+ *caps |= V4L2_BUF_CAP_SUPPORTS_MMAP;
+ if (q->io_modes & VB2_USERPTR)
+ *caps |= V4L2_BUF_CAP_SUPPORTS_USERPTR;
+ if (q->io_modes & VB2_DMABUF)
+ *caps |= V4L2_BUF_CAP_SUPPORTS_DMABUF;
+ if (q->supports_requests)
+ *caps |= V4L2_BUF_CAP_SUPPORTS_REQUESTS;
+}
+
int vb2_reqbufs(struct vb2_queue *q, struct v4l2_requestbuffers *req)
{
int ret = vb2_verify_memory_type(q, req->memory, req->type);
+ fill_buf_caps(q, &req->capabilities);
return ret ? ret : vb2_core_reqbufs(q, req->memory, &req->count);
}
EXPORT_SYMBOL_GPL(vb2_reqbufs);
@@ -513,6 +527,7 @@ int vb2_create_bufs(struct vb2_queue *q,
int ret = vb2_verify_memory_type(q, create->memory, f->type);
unsigned i;
+ fill_buf_caps(q, &create->capabilities);
create->index = q->num_buffers;
if (create->count == 0)
return ret != -EBUSY ? ret : 0;
@@ -713,6 +728,7 @@ int vb2_ioctl_reqbufs(struct file *file,
struct video_device *vdev = video_devdata(file);
int res = vb2_verify_memory_type(vdev->queue, p->memory, p->type);
+ fill_buf_caps(vdev->queue, &p->capabilities);
if (res)
return res;
if (vb2_queue_is_busy(vdev, file))
@@ -734,6 +750,7 @@ int vb2_ioctl_create_bufs(struct file *f
p->format.type);
p->index = vdev->queue->num_buffers;
+ fill_buf_caps(vdev->queue, &p->capabilities);
/*
* If count == 0, then just check if memory and type are valid.
* Any -EBUSY result from vb2_verify_memory_type can be mapped to 0.
--- a/drivers/media/platform/vim2m.c
+++ b/drivers/media/platform/vim2m.c
@@ -840,6 +840,7 @@ static int queue_init(void *priv, struct
src_vq->mem_ops = &vb2_vmalloc_memops;
src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
src_vq->lock = &ctx->dev->dev_mutex;
+ src_vq->supports_requests = true;
ret = vb2_queue_init(src_vq);
if (ret)
--- a/drivers/media/platform/vivid/vivid-core.c
+++ b/drivers/media/platform/vivid/vivid-core.c
@@ -1060,6 +1060,7 @@ static int vivid_create_instance(struct
q->min_buffers_needed = 2;
q->lock = &dev->mutex;
q->dev = dev->v4l2_dev.dev;
+ q->supports_requests = true;
ret = vb2_queue_init(q);
if (ret)
@@ -1080,6 +1081,7 @@ static int vivid_create_instance(struct
q->min_buffers_needed = 2;
q->lock = &dev->mutex;
q->dev = dev->v4l2_dev.dev;
+ q->supports_requests = true;
ret = vb2_queue_init(q);
if (ret)
@@ -1100,6 +1102,7 @@ static int vivid_create_instance(struct
q->min_buffers_needed = 2;
q->lock = &dev->mutex;
q->dev = dev->v4l2_dev.dev;
+ q->supports_requests = true;
ret = vb2_queue_init(q);
if (ret)
@@ -1120,6 +1123,7 @@ static int vivid_create_instance(struct
q->min_buffers_needed = 2;
q->lock = &dev->mutex;
q->dev = dev->v4l2_dev.dev;
+ q->supports_requests = true;
ret = vb2_queue_init(q);
if (ret)
@@ -1139,6 +1143,7 @@ static int vivid_create_instance(struct
q->min_buffers_needed = 8;
q->lock = &dev->mutex;
q->dev = dev->v4l2_dev.dev;
+ q->supports_requests = true;
ret = vb2_queue_init(q);
if (ret)
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -251,7 +251,8 @@ struct v4l2_create_buffers32 {
__u32 count;
__u32 memory; /* enum v4l2_memory */
struct v4l2_format32 format;
- __u32 reserved[8];
+ __u32 capabilities;
+ __u32 reserved[7];
};
static int __bufsize_v4l2_format(struct v4l2_format32 __user *p32, u32 *size)
@@ -411,6 +412,7 @@ static int put_v4l2_create32(struct v4l2
if (!access_ok(VERIFY_WRITE, p32, sizeof(*p32)) ||
copy_in_user(p32, p64,
offsetof(struct v4l2_create_buffers32, format)) ||
+ assign_in_user(&p32->capabilities, &p64->capabilities) ||
copy_in_user(p32->reserved, p64->reserved, sizeof(p64->reserved)))
return -EFAULT;
return __put_v4l2_format32(&p64->format, &p32->format);
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -1882,7 +1882,7 @@ static int v4l_reqbufs(const struct v4l2
if (ret)
return ret;
- CLEAR_AFTER_FIELD(p, memory);
+ CLEAR_AFTER_FIELD(p, capabilities);
return ops->vidioc_reqbufs(file, fh, p);
}
@@ -1923,7 +1923,7 @@ static int v4l_create_bufs(const struct
if (ret)
return ret;
- CLEAR_AFTER_FIELD(create, format);
+ CLEAR_AFTER_FIELD(create, capabilities);
v4l_sanitize_format(&create->format);
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -449,6 +449,7 @@ struct vb2_buf_ops {
* @quirk_poll_must_check_waiting_for_buffers: Return %EPOLLERR at poll when QBUF
* has not been called. This is a vb1 idiom that has been adopted
* also by vb2.
+ * @supports_requests: this queue supports the Request API.
* @lock: pointer to a mutex that protects the &struct vb2_queue. The
* driver can set this to a mutex to let the v4l2 core serialize
* the queuing ioctls. If the driver wants to handle locking
@@ -516,6 +517,7 @@ struct vb2_queue {
unsigned fileio_write_immediately:1;
unsigned allow_zero_bytesused:1;
unsigned quirk_poll_must_check_waiting_for_buffers:1;
+ unsigned supports_requests:1;
struct mutex *lock;
void *owner;