Add v4l2_subdev_call_state_active() macro to help calling subdev ops
that take a subdev state as a parameter.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx>
---
include/media/v4l2-subdev.h | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index 84c02488d53f..0db61203c8d9 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -1359,6 +1359,37 @@ extern const struct v4l2_subdev_ops v4l2_subdev_call_wrappers;
__result; \
})
+/**
+ * v4l2_subdev_call_state_active - call an operation of a v4l2_subdev which
+ * takes state as a parameter, passing the
+ * subdev its active state.
+ *
+ * @sd: pointer to the &struct v4l2_subdev
+ * @o: name of the element at &struct v4l2_subdev_ops that contains @f.
+ * Each element there groups a set of callbacks functions.
+ * @f: callback function to be called.
+ * The callback functions are defined in groups, according to
+ * each element at &struct v4l2_subdev_ops.
+ * @args: arguments for @f.
+ *
+ * This is similar to v4l2_subdev_call(), except that this version can only be
+ * used for ops that take a subdev state as a parameter. The macro will get the
+ * active state and lock it before calling the op, and unlock it after the
+ * call.
+ */
+#define v4l2_subdev_call_state_active(sd, o, f, args...) \
+ ({ \
+ int __result; \
+ struct v4l2_subdev_state *state; \
+ state = v4l2_subdev_get_active_state(sd); \
+ if (state) \
+ v4l2_subdev_lock_state(state); \
+ __result = v4l2_subdev_call(sd, o, f, state, ##args); \
+ if (state) \
+ v4l2_subdev_unlock_state(state); \
+ __result; \
+ })
+
/**
* v4l2_subdev_has_op - Checks if a subdev defines a certain operation.
*
--
2.25.1
