The current way that this function works is subject to problems
as new controls gets added. Move it to v4l2-ctrls and use the
knowledge that v4l2_ctrl_fill() has about controls, in order to
detect if a given control is a pointer.
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-compat-ioctl32.c | 18 +-----------------
drivers/media/v4l2-core/v4l2-ctrls.c | 18 ++++++++++++++++++
include/media/v4l2-ctrls.h | 8 ++++++++
3 files changed, 27 insertions(+), 17 deletions(-)
diff --git a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
index af8b4c5b0efa..0adcc37280c8 100644
--- a/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
+++ b/drivers/media/v4l2-core/v4l2-compat-ioctl32.c
@@ -19,6 +19,7 @@
#include <linux/v4l2-subdev.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-ioctl.h>
+#include <media/v4l2-ctrls.h>
static long native_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
@@ -668,23 +669,6 @@ struct v4l2_ext_control32 {
};
} __attribute__ ((packed));
-/* The following function really belong in v4l2-common, but that causes
- a circular dependency between modules. We need to think about this, but
- for now this will do. */
-
-/* Return non-zero if this control is a pointer type. Currently only
- type STRING is a pointer type. */
-static inline int ctrl_is_pointer(u32 id)
-{
- switch (id) {
- case V4L2_CID_RDS_TX_PS_NAME:
- case V4L2_CID_RDS_TX_RADIO_TEXT:
- return 1;
- default:
- return 0;
- }
-}
-
static int get_v4l2_ext_controls32(struct v4l2_ext_controls *kp, struct v4l2_ext_controls32 __user *up)
{
struct v4l2_ext_control32 __user *ucontrols;
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index c512b7539077..0d5dab485723 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -1254,6 +1254,24 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
}
EXPORT_SYMBOL(v4l2_ctrl_fill);
+bool ctrl_is_pointer(u32 id)
+{
+ enum v4l2_ctrl_type type;
+
+ v4l2_ctrl_fill(id, NULL, &type, NULL, NULL, NULL, NULL, NULL);
+
+ switch (type) {
+ case V4L2_CTRL_TYPE_STRING:
+ case V4L2_CTRL_TYPE_U8:
+ case V4L2_CTRL_TYPE_U16:
+ case V4L2_CTRL_TYPE_U32:
+ return true;
+ default:
+ return false;
+ }
+}
+EXPORT_SYMBOL(ctrl_is_pointer);
+
static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes)
{
memset(ev->reserved, 0, sizeof(ev->reserved));
diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
index e22dea218a4c..bc6772f50956 100644
--- a/include/media/v4l2-ctrls.h
+++ b/include/media/v4l2-ctrls.h
@@ -367,6 +367,14 @@ struct v4l2_ctrl_config {
void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
s64 *min, s64 *max, u64 *step, s64 *def, u32 *flags);
+/**
+ * ctrl_is_pointer - Returns non-zero if this control is a pointer type.
+ *
+ * @id: ID of the control
+ *
+ * Currently only STRING and compound types are pointers.
+ */
+bool ctrl_is_pointer(u32 id);
/**
* v4l2_ctrl_handler_init_class() - Initialize the control handler.
--
2.13.3
