--- /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;
projects / openwrt / openwrt.git / blobdiff