From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
The v4l2_g/s_ext_ctrls functions now support control handlers that
represent requests.
The v4l2_ctrls_find_req_obj() function is responsible for finding the
request from the fd.
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
---
drivers/media/platform/omap3isp/ispvideo.c | 2 +-
drivers/media/v4l2-core/v4l2-ctrls.c | 138 +++++++++++++++++++--
drivers/media/v4l2-core/v4l2-ioctl.c | 12 +-
drivers/media/v4l2-core/v4l2-subdev.c | 9 +-
include/media/v4l2-ctrls.h | 7 +-
5 files changed, 149 insertions(+), 19 deletions(-)
diff --git a/drivers/media/platform/omap3isp/ispvideo.c b/drivers/media/platform/omap3isp/ispvideo.c
index 9d228eac24ea..674e7fd3ad99 100644
--- a/drivers/media/platform/omap3isp/ispvideo.c
+++ b/drivers/media/platform/omap3isp/ispvideo.c
@@ -1028,7 +1028,7 @@ static int isp_video_check_external_subdevs(struct isp_video *video,
ctrls.count = 1;
ctrls.controls = &ctrl;
- ret = v4l2_g_ext_ctrls(pipe->external->ctrl_handler, &ctrls);
+ ret = v4l2_g_ext_ctrls(pipe->external->ctrl_handler, NULL, &ctrls);
if (ret < 0) {
dev_warn(isp->dev, "no pixel rate control in subdev %s\n",
pipe->external->name);
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index b8ff6d6b14cd..86a6ae54ccaa 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -3140,7 +3140,8 @@ static int class_check(struct v4l2_ctrl_handler *hdl, u32 which)
}
/* Get extended controls. Allocates the helpers array if needed. */
-int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
+int __v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl,
+ struct v4l2_ext_controls *cs)
{
struct v4l2_ctrl_helper helper[4];
struct v4l2_ctrl_helper *helpers = helper;
@@ -3220,6 +3221,83 @@ int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs
kvfree(helpers);
return ret;
}
+
+static struct media_request_object *
+v4l2_ctrls_find_req_obj(struct v4l2_ctrl_handler *hdl,
+ struct media_request *req, bool set)
+{
+ struct media_request_object *obj;
+ struct v4l2_ctrl_handler *new_hdl;
+ int ret;
+
+ if (IS_ERR(req))
+ return ERR_CAST(req);
+
+ if (set && WARN_ON(req->state != MEDIA_REQUEST_STATE_UPDATING))
+ return ERR_PTR(-EBUSY);
+
+ obj = media_request_object_find(req, &req_ops, hdl);
+ if (obj)
+ return obj;
+ if (!set)
+ return ERR_PTR(-ENOENT);
+
+ new_hdl = kzalloc(sizeof(*new_hdl), GFP_KERNEL);
+ if (!new_hdl)
+ return ERR_PTR(-ENOMEM);
+
+ obj = &new_hdl->req_obj;
+ ret = v4l2_ctrl_handler_init(new_hdl, (hdl->nr_of_buckets - 1) * 8);
+ if (!ret)
+ ret = v4l2_ctrl_request_bind(req, new_hdl, hdl);
+ if (ret) {
+ kfree(new_hdl);
+
+ return ERR_PTR(ret);
+ }
+
+ media_request_object_get(obj);
+ return obj;
+}
+
+int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct media_device *mdev,
+ struct v4l2_ext_controls *cs)
+{
+ struct media_request_object *obj = NULL;
+ int ret;
+
+ if (cs->which == V4L2_CTRL_WHICH_REQUEST_VAL) {
+ struct media_request *req;
+
+ if (!mdev || cs->request_fd < 0)
+ return -EINVAL;
+
+ req = media_request_get_by_fd(mdev, cs->request_fd);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
+
+ if (req->state != MEDIA_REQUEST_STATE_IDLE &&
+ req->state != MEDIA_REQUEST_STATE_COMPLETE) {
+ media_request_put(req);
+ return -EBUSY;
+ }
+
+ obj = v4l2_ctrls_find_req_obj(hdl, req, false);
+ /* Reference to the request held through obj */
+ media_request_put(req);
+ if (IS_ERR(obj))
+ return PTR_ERR(obj);
+
+ hdl = container_of(obj, struct v4l2_ctrl_handler,
+ req_obj);
+ }
+
+ ret = __v4l2_g_ext_ctrls(hdl, cs);
+
+ if (obj)
+ media_request_object_put(obj);
+ return ret;
+}
EXPORT_SYMBOL(v4l2_g_ext_ctrls);
/* Helper function to get a single control */
@@ -3408,9 +3486,9 @@ static void update_from_auto_cluster(struct v4l2_ctrl *master)
}
/* Try or try-and-set controls */
-static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
- struct v4l2_ext_controls *cs,
- bool set)
+static int __try_set_ext_ctrls(struct v4l2_fh *fh,
+ struct v4l2_ctrl_handler *hdl,
+ struct v4l2_ext_controls *cs, bool set)
{
struct v4l2_ctrl_helper helper[4];
struct v4l2_ctrl_helper *helpers = helper;
@@ -3523,16 +3601,60 @@ static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
return ret;
}
-int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
+static int try_set_ext_ctrls(struct v4l2_fh *fh,
+ struct v4l2_ctrl_handler *hdl, struct media_device *mdev,
+ struct v4l2_ext_controls *cs, bool set)
+{
+ struct media_request_object *obj = NULL;
+ struct media_request *req = NULL;
+ int ret;
+
+ if (cs->which == V4L2_CTRL_WHICH_REQUEST_VAL) {
+ if (!mdev || cs->request_fd < 0)
+ return -EINVAL;
+
+ req = media_request_get_by_fd(mdev, cs->request_fd);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
+
+ ret = media_request_lock_for_update(req);
+ if (ret) {
+ media_request_put(req);
+ return ret;
+ }
+
+ obj = v4l2_ctrls_find_req_obj(hdl, req, set);
+ /* Reference to the request held through obj */
+ media_request_put(req);
+ if (IS_ERR(obj)) {
+ media_request_unlock_for_update(req);
+ return PTR_ERR(obj);
+ }
+ hdl = container_of(obj, struct v4l2_ctrl_handler,
+ req_obj);
+ }
+
+ ret = __try_set_ext_ctrls(fh, hdl, cs, set);
+
+ if (obj) {
+ media_request_unlock_for_update(obj->req);
+ media_request_object_put(obj);
+ }
+
+ return ret;
+}
+
+int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct media_device *mdev,
+ struct v4l2_ext_controls *cs)
{
- return try_set_ext_ctrls(NULL, hdl, cs, false);
+ return try_set_ext_ctrls(NULL, hdl, mdev, cs, false);
}
EXPORT_SYMBOL(v4l2_try_ext_ctrls);
int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
- struct v4l2_ext_controls *cs)
+ struct media_device *mdev, struct v4l2_ext_controls *cs)
{
- return try_set_ext_ctrls(fh, hdl, cs, true);
+ return try_set_ext_ctrls(fh, hdl, mdev, cs, true);
}
EXPORT_SYMBOL(v4l2_s_ext_ctrls);
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index 03241d6b7ef8..20b5145a5254 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -2109,9 +2109,9 @@ static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
p->error_idx = p->count;
if (vfh && vfh->ctrl_handler)
- return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
+ return v4l2_g_ext_ctrls(vfh->ctrl_handler, vfd->v4l2_dev->mdev, p);
if (vfd->ctrl_handler)
- return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
+ return v4l2_g_ext_ctrls(vfd->ctrl_handler, vfd->v4l2_dev->mdev, p);
if (ops->vidioc_g_ext_ctrls == NULL)
return -ENOTTY;
return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
@@ -2128,9 +2128,9 @@ static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
p->error_idx = p->count;
if (vfh && vfh->ctrl_handler)
- return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
+ return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, vfd->v4l2_dev->mdev, p);
if (vfd->ctrl_handler)
- return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
+ return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, vfd->v4l2_dev->mdev, p);
if (ops->vidioc_s_ext_ctrls == NULL)
return -ENOTTY;
return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
@@ -2147,9 +2147,9 @@ static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
p->error_idx = p->count;
if (vfh && vfh->ctrl_handler)
- return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
+ return v4l2_try_ext_ctrls(vfh->ctrl_handler, vfd->v4l2_dev->mdev, p);
if (vfd->ctrl_handler)
- return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
+ return v4l2_try_ext_ctrls(vfd->ctrl_handler, vfd->v4l2_dev->mdev, p);
if (ops->vidioc_try_ext_ctrls == NULL)
return -ENOTTY;
return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index 2b63fa6b6fc9..0fdbd85532dd 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -222,17 +222,20 @@ static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg)
case VIDIOC_G_EXT_CTRLS:
if (!vfh->ctrl_handler)
return -ENOTTY;
- return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg);
+ return v4l2_g_ext_ctrls(vfh->ctrl_handler,
+ sd->v4l2_dev->mdev, arg);
case VIDIOC_S_EXT_CTRLS:
if (!vfh->ctrl_handler)
return -ENOTTY;
- return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg);
+ return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler,
+ sd->v4l2_dev->mdev, arg);
case VIDIOC_TRY_EXT_CTRLS:
if (!vfh->ctrl_handler)
return -ENOTTY;
- return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg);
+ return v4l2_try_ext_ctrls(vfh->ctrl_handler,
+ sd->v4l2_dev->mdev, arg);
case VIDIOC_DQEVENT:
if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS))
diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
index 3617d5077b19..98b1e70a4a46 100644
--- a/include/media/v4l2-ctrls.h
+++ b/include/media/v4l2-ctrls.h
@@ -1179,11 +1179,12 @@ int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
* :ref:`VIDIOC_G_EXT_CTRLS <vidioc_g_ext_ctrls>` ioctl
*
* @hdl: pointer to &struct v4l2_ctrl_handler
+ * @mdev: pointer to &struct media_device
* @c: pointer to &struct v4l2_ext_controls
*
* If hdl == NULL then they will all return -EINVAL.
*/
-int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl,
+int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct media_device *mdev,
struct v4l2_ext_controls *c);
/**
@@ -1191,11 +1192,13 @@ int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl,
* :ref:`VIDIOC_TRY_EXT_CTRLS <vidioc_g_ext_ctrls>` ioctl
*
* @hdl: pointer to &struct v4l2_ctrl_handler
+ * @mdev: pointer to &struct media_device
* @c: pointer to &struct v4l2_ext_controls
*
* If hdl == NULL then they will all return -EINVAL.
*/
int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl,
+ struct media_device *mdev,
struct v4l2_ext_controls *c);
/**
@@ -1204,11 +1207,13 @@ int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl,
*
* @fh: pointer to &struct v4l2_fh
* @hdl: pointer to &struct v4l2_ctrl_handler
+ * @mdev: pointer to &struct media_device
* @c: pointer to &struct v4l2_ext_controls
*
* If hdl == NULL then they will all return -EINVAL.
*/
int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
+ struct media_device *mdev,
struct v4l2_ext_controls *c);
/**
--
2.18.0
