[PATCH v4 27/29] media: v4l2-subdev: Add v4l2_subdev_call_ci_active_state

Sakari Ailus
2026-04-08T15:40:27Z

Add v4l2_subdev_call_ci_active_state(), to call sub-device pad ops that
take struct v4l2_subdev_client_info pointer as an argument.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
include/media/v4l2-subdev.h | 49 ++++++++++++++++++++++++++++---------
1 file changed, 38 insertions(+), 11 deletions(-)

diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index 1ce1c18f84a9..9b0e091c30c1 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -1968,6 +1968,22 @@ extern const struct v4l2_subdev_ops v4l2_subdev_call_wrappers;
__result; \
})

+#define v4l2_subdev_call_drop_fourth(first, second, third, fourth, rest...) \
+ v4l2_subdev_call(first, second, third, ##rest)
+
+#define __v4l2_subdev_call_state_active(call, sd, o, f, args...) \
+ ({ \
+ int __result; \
+ struct v4l2_subdev_state *state; \
+ state = v4l2_subdev_get_unlocked_active_state(sd); \
+ if (state) \
+ v4l2_subdev_lock_state(state); \
+ __result = call(sd, o, f, NULL, state, ##args); \
+ if (state) \
+ v4l2_subdev_unlock_state(state); \
+ __result; \
+ })
+
/**
* v4l2_subdev_call_state_active - call an operation of a v4l2_subdev which
* takes state as a parameter, passing the
@@ -1986,17 +2002,28 @@ extern const struct v4l2_subdev_ops v4l2_subdev_call_wrappers;
* active state, 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_unlocked_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_call_state_active(v4l2_subdev_call_drop_fourth, \
+ sd, o, f, ##args)
+
+/**
+ * v4l2_subdev_call_ci_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 macro is just as v4l2_subdev_call_state_active(), with the exception
+ * that it passes NULL as the client info to sub-device ops that need it
+ * (currently pad ops get_fmt, set_fmt, get_selection and set_selection).
+ */
+#define v4l2_subdev_call_ci_state_active(sd, o, f, args...) \
+ __v4l2_subdev_call_state_active(v4l2_subdev_call, sd, o, f, ##args)

/**
* v4l2_subdev_call_state_try - call an operation of a v4l2_subdev which
--
2.47.3