[media] v4l: ctrls: Unlocked variants of v4l2_ctrl_s_ctrl{,_int64}()
Implement unlocked variants of v4l2_ctrl_s_ctrl() and
v4l2_ctrl_s_ctrl_int64(). As drivers need to set controls as they access
driver internal state elsewhere than in the control framework unlocked
variants of these functions become handy.
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index 9cd9783..1acc7aa 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -3175,27 +3175,41 @@
}
EXPORT_SYMBOL(v4l2_subdev_s_ctrl);
-int v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
+int __v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
{
struct v4l2_ext_control c;
+ int rval;
+
+ lockdep_assert_held(ctrl->handler->lock);
/* It's a driver bug if this happens. */
WARN_ON(!ctrl->is_int);
c.value = val;
- return set_ctrl_lock(NULL, ctrl, &c);
-}
-EXPORT_SYMBOL(v4l2_ctrl_s_ctrl);
+ rval = set_ctrl(NULL, ctrl, &c, 0);
+ if (!rval)
+ cur_to_user(&c, ctrl);
-int v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val)
+ return rval;
+}
+EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl);
+
+int __v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val)
{
struct v4l2_ext_control c;
+ int rval;
+
+ lockdep_assert_held(ctrl->handler->lock);
/* It's a driver bug if this happens. */
WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
c.value64 = val;
- return set_ctrl_lock(NULL, ctrl, &c);
+ rval = set_ctrl(NULL, ctrl, &c, 0);
+ if (!rval)
+ cur_to_user(&c, ctrl);
+
+ return rval;
}
-EXPORT_SYMBOL(v4l2_ctrl_s_ctrl_int64);
+EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_int64);
void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv)
{
diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
index 5d1a30c..8c4edd6 100644
--- a/include/media/v4l2-ctrls.h
+++ b/include/media/v4l2-ctrls.h
@@ -679,6 +679,8 @@
*/
s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl);
+/** __v4l2_ctrl_s_ctrl() - Unlocked variant of v4l2_ctrl_s_ctrl(). */
+int __v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val);
/** v4l2_ctrl_s_ctrl() - Helper function to set the control's value from within a driver.
* @ctrl: The control.
* @val: The new value.
@@ -689,7 +691,16 @@
*
* This function is for integer type controls only.
*/
-int v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val);
+static inline int v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
+{
+ int rval;
+
+ v4l2_ctrl_lock(ctrl);
+ rval = __v4l2_ctrl_s_ctrl(ctrl, val);
+ v4l2_ctrl_unlock(ctrl);
+
+ return rval;
+}
/** v4l2_ctrl_g_ctrl_int64() - Helper function to get a 64-bit control's value from within a driver.
* @ctrl: The control.
@@ -702,6 +713,9 @@
*/
s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl);
+/** __v4l2_ctrl_s_ctrl_int64() - Unlocked variant of v4l2_ctrl_s_ctrl_int64(). */
+int __v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val);
+
/** v4l2_ctrl_s_ctrl_int64() - Helper function to set a 64-bit control's value from within a driver.
* @ctrl: The control.
* @val: The new value.
@@ -712,7 +726,16 @@
*
* This function is for 64-bit integer type controls only.
*/
-int v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val);
+static inline int v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val)
+{
+ int rval;
+
+ v4l2_ctrl_lock(ctrl);
+ rval = __v4l2_ctrl_s_ctrl_int64(ctrl, val);
+ v4l2_ctrl_unlock(ctrl);
+
+ return rval;
+}
/* Internal helper functions that deal with control events. */
extern const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops;