The sub-device state access functions take three arguments: sub-device
state, pad and stream. The stream is not relevant for the majority of
drivers and having to specify 0 for the stream is considered a nuisance.
Provide a two-argument macros for these state access functions to cover
the needs of stream-unaware users.
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
---
drivers/media/v4l2-core/v4l2-subdev.c | 18 +++++-----
include/media/v4l2-subdev.h | 49 ++++++++++++++++++++++-----
2 files changed, 49 insertions(+), 18 deletions(-)
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index 9eef170934c5..06988e3a6f10 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -1678,8 +1678,8 @@ int v4l2_subdev_set_routing_with_fmt(struct v4l2_subdev *sd,
EXPORT_SYMBOL_GPL(v4l2_subdev_set_routing_with_fmt);
struct v4l2_mbus_framefmt *
-v4l2_subdev_state_get_format(struct v4l2_subdev_state *state, unsigned int pad,
- u32 stream)
+__v4l2_subdev_state_get_format(struct v4l2_subdev_state *state,
+ unsigned int pad, u32 stream)
{
struct v4l2_subdev_stream_configs *stream_configs;
unsigned int i;
@@ -1717,11 +1717,11 @@ v4l2_subdev_state_get_format(struct v4l2_subdev_state *state, unsigned int pad,
return NULL;
}
-EXPORT_SYMBOL_GPL(v4l2_subdev_state_get_format);
+EXPORT_SYMBOL_GPL(__v4l2_subdev_state_get_format);
struct v4l2_rect *
-v4l2_subdev_state_get_crop(struct v4l2_subdev_state *state, unsigned int pad,
- u32 stream)
+__v4l2_subdev_state_get_crop(struct v4l2_subdev_state *state, unsigned int pad,
+ u32 stream)
{
struct v4l2_subdev_stream_configs *stream_configs;
unsigned int i;
@@ -1759,11 +1759,11 @@ v4l2_subdev_state_get_crop(struct v4l2_subdev_state *state, unsigned int pad,
return NULL;
}
-EXPORT_SYMBOL_GPL(v4l2_subdev_state_get_crop);
+EXPORT_SYMBOL_GPL(__v4l2_subdev_state_get_crop);
struct v4l2_rect *
-v4l2_subdev_state_get_compose(struct v4l2_subdev_state *state, unsigned int pad,
- u32 stream)
+__v4l2_subdev_state_get_compose(struct v4l2_subdev_state *state,
+ unsigned int pad, u32 stream)
{
struct v4l2_subdev_stream_configs *stream_configs;
unsigned int i;
@@ -1801,7 +1801,7 @@ v4l2_subdev_state_get_compose(struct v4l2_subdev_state *state, unsigned int pad,
return NULL;
}
-EXPORT_SYMBOL_GPL(v4l2_subdev_state_get_compose);
+EXPORT_SYMBOL_GPL(__v4l2_subdev_state_get_compose);
int v4l2_subdev_routing_find_opposite_end(const struct v4l2_subdev_krouting *routing,
u32 pad, u32 stream, u32 *other_pad,
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index f144d49a825c..c8ac91a2cdb8 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -1534,11 +1534,18 @@ int v4l2_subdev_set_routing_with_fmt(struct v4l2_subdev *sd,
const struct v4l2_subdev_krouting *routing,
const struct v4l2_mbus_framefmt *fmt);
+/*
+ * A macro to generate the macro or function name for sub-devices state access
+ * wrapper macros below.
+ */
+#define __v4l2_subdev_state_gen_call(NAME, _1, ARG, ...) \
+ __v4l2_subdev_state_get_ ## NAME ## ARG
+
/**
* v4l2_subdev_state_get_format() - Get pointer to a stream format
* @state: subdevice state
* @pad: pad id
- * @stream: stream id
+ * @...: stream id (optional argument)
*
* This returns a pointer to &struct v4l2_mbus_framefmt for the given pad +
* stream in the subdev state.
@@ -1546,15 +1553,29 @@ int v4l2_subdev_set_routing_with_fmt(struct v4l2_subdev *sd,
* For stream-unaware drivers the format for the corresponding pad is returned.
* If the pad does not exist, NULL is returned.
*/
+/*
+ * Wrap v4l2_subdev_state_get_format(), allowing the function to be called with
+ * two or three arguments. The purpose of the __v4l2_subdev_state_get_format()
+ * macro below is to come up with the name of the function or macro to call,
+ * using the last two arguments (_stream and _pad). The selected function or
+ * macro is then called using the arguments specified by the caller. A similar
+ * arrangement is used for v4l2_subdev_state_crop() and
+ * v4l2_subdev_state_compose() below.
+ */
+#define v4l2_subdev_state_get_format(state, pad, ...) \
+ __v4l2_subdev_state_gen_call(format, ##__VA_ARGS__, , _pad) \
+ (state, pad, ##__VA_ARGS__)
+#define __v4l2_subdev_state_get_format_pad(state, pad) \
+ __v4l2_subdev_state_get_format(state, pad, 0)
struct v4l2_mbus_framefmt *
-v4l2_subdev_state_get_format(struct v4l2_subdev_state *state, unsigned int pad,
- u32 stream);
+__v4l2_subdev_state_get_format(struct v4l2_subdev_state *state,
+ unsigned int pad, u32 stream);
/**
* v4l2_subdev_state_get_crop() - Get pointer to a stream crop rectangle
* @state: subdevice state
* @pad: pad id
- * @stream: stream id
+ * @...: stream id (optional argument)
*
* This returns a pointer to crop rectangle for the given pad + stream in the
* subdev state.
@@ -1562,15 +1583,20 @@ v4l2_subdev_state_get_format(struct v4l2_subdev_state *state, unsigned int pad,
* For stream-unaware drivers the crop rectangle for the corresponding pad is
* returned. If the pad does not exist, NULL is returned.
*/
+#define v4l2_subdev_state_get_crop(state, pad, ...) \
+ __v4l2_subdev_state_gen_call(crop, ##__VA_ARGS__, , _pad) \
+ (state, pad, ##__VA_ARGS__)
+#define __v4l2_subdev_state_get_crop_pad(state, pad) \
+ __v4l2_subdev_state_get_crop(state, pad, 0)
struct v4l2_rect *
-v4l2_subdev_state_get_crop(struct v4l2_subdev_state *state, unsigned int pad,
- u32 stream);
+__v4l2_subdev_state_get_crop(struct v4l2_subdev_state *state, unsigned int pad,
+ u32 stream);
/**
* v4l2_subdev_state_get_compose() - Get pointer to a stream compose rectangle
* @state: subdevice state
* @pad: pad id
- * @stream: stream id
+ * @...: stream id (optional argument)
*
* This returns a pointer to compose rectangle for the given pad + stream in the
* subdev state.
@@ -1578,9 +1604,14 @@ v4l2_subdev_state_get_crop(struct v4l2_subdev_state *state, unsigned int pad,
* For stream-unaware drivers the compose rectangle for the corresponding pad is
* returned. If the pad does not exist, NULL is returned.
*/
+#define v4l2_subdev_state_get_compose(state, pad, ...) \
+ __v4l2_subdev_state_gen_call(compose, ##__VA_ARGS__, , _pad) \
+ (state, pad, ##__VA_ARGS__)
+#define __v4l2_subdev_state_get_compose_pad(state, pad) \
+ __v4l2_subdev_state_get_compose(state, pad, 0)
struct v4l2_rect *
-v4l2_subdev_state_get_compose(struct v4l2_subdev_state *state, unsigned int pad,
- u32 stream);
+__v4l2_subdev_state_get_compose(struct v4l2_subdev_state *state,
+ unsigned int pad, u32 stream);
/**
* v4l2_subdev_routing_find_opposite_end() - Find the opposite stream
--
2.39.2
