+++ /dev/null
-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;
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