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media: v4l2-ctrls: Export default v4l2_ctrl_type_ops callbacks

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Export the callback functions of the default v4l2 control type operations
such as a driver defining its own operations could reuse some of them.

Signed-off-by: Xavier Roumegue <xavier.roumegue@oss.nxp.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Xavier Roumegue 2022-07-30 17:48:37 +02:00 committed by Mauro Carvalho Chehab
parent 6b1aaa6893
commit f1739ec4c7
2 changed files with 65 additions and 13 deletions
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28
drivers/media/v4l2-core/v4l2-ctrls-core.c
View File

@ -65,9 +65,8 @@ void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes)
v4l2_event_queue_fh(sev->fh, &ev);
}
static bool std_equal(const struct v4l2_ctrl *ctrl, u32 elems,
union v4l2_ctrl_ptr ptr1,
union v4l2_ctrl_ptr ptr2)
bool v4l2_ctrl_type_op_equal(const struct v4l2_ctrl *ctrl, u32 elems,
union v4l2_ctrl_ptr ptr1, union v4l2_ctrl_ptr ptr2)
{
unsigned int i;
@ -88,6 +87,7 @@ static bool std_equal(const struct v4l2_ctrl *ctrl, u32 elems,
elems * ctrl->elem_size);
}
}
EXPORT_SYMBOL(v4l2_ctrl_type_op_equal);
/* Default intra MPEG-2 quantisation coefficients, from the specification. */
static const u8 mpeg2_intra_quant_matrix[64] = {
@ -177,8 +177,8 @@ static void std_init_compound(const struct v4l2_ctrl *ctrl, u32 idx,
}
}
static void std_init(const struct v4l2_ctrl *ctrl, u32 from_idx, u32 tot_elems,
union v4l2_ctrl_ptr ptr)
void v4l2_ctrl_type_op_init(const struct v4l2_ctrl *ctrl, u32 from_idx,
u32 tot_elems, union v4l2_ctrl_ptr ptr)
{
unsigned int i;
u32 elems = tot_elems - from_idx;
@ -244,8 +244,9 @@ static void std_init(const struct v4l2_ctrl *ctrl, u32 from_idx, u32 tot_elems,
break;
}
}
EXPORT_SYMBOL(v4l2_ctrl_type_op_init);
static void std_log(const struct v4l2_ctrl *ctrl)
void v4l2_ctrl_type_op_log(const struct v4l2_ctrl *ctrl)
{
union v4l2_ctrl_ptr ptr = ctrl->p_cur;
@ -353,6 +354,7 @@ static void std_log(const struct v4l2_ctrl *ctrl)
break;
}
}
EXPORT_SYMBOL(v4l2_ctrl_type_op_log);
/*
* Round towards the closest legal value. Be careful when we are
@ -546,7 +548,8 @@ validate_vp9_frame(struct v4l2_ctrl_vp9_frame *frame)
/*
* Compound controls validation requires setting unused fields/flags to zero
* in order to properly detect unchanged controls with std_equal's memcmp.
* in order to properly detect unchanged controls with v4l2_ctrl_type_op_equal's
* memcmp.
*/
static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
union v4l2_ctrl_ptr ptr)
@ -992,7 +995,7 @@ static int std_validate_elem(const struct v4l2_ctrl *ctrl, u32 idx,
}
}
static int std_validate(const struct v4l2_ctrl *ctrl, u32 elems,
int v4l2_ctrl_type_op_validate(const struct v4l2_ctrl *ctrl, u32 elems,
union v4l2_ctrl_ptr ptr)
{
unsigned int i;
@ -1022,12 +1025,13 @@ static int std_validate(const struct v4l2_ctrl *ctrl, u32 elems,
ret = std_validate_elem(ctrl, i, ptr);
return ret;
}
EXPORT_SYMBOL(v4l2_ctrl_type_op_validate);
static const struct v4l2_ctrl_type_ops std_type_ops = {
.equal = std_equal,
.init = std_init,
.log = std_log,
.validate = std_validate,
.equal = v4l2_ctrl_type_op_equal,
.init = v4l2_ctrl_type_op_init,
.log = v4l2_ctrl_type_op_log,
.validate = v4l2_ctrl_type_op_validate,
};
void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv)

48
include/media/v4l2-ctrls.h
View File

@ -1538,4 +1538,52 @@ int v4l2_ctrl_subdev_log_status(struct v4l2_subdev *sd);
int v4l2_ctrl_new_fwnode_properties(struct v4l2_ctrl_handler *hdl,
const struct v4l2_ctrl_ops *ctrl_ops,
const struct v4l2_fwnode_device_properties *p);
/**
* v4l2_ctrl_type_op_equal - Default v4l2_ctrl_type_ops equal callback.
*
* @ctrl: The v4l2_ctrl pointer.
* @elems: The number of elements to compare.
* @ptr1: A v4l2 control value.
* @ptr2: A v4l2 control value.
*
* Return: true if values are equal, otherwise false.
*/
bool v4l2_ctrl_type_op_equal(const struct v4l2_ctrl *ctrl, u32 elems,
union v4l2_ctrl_ptr ptr1, union v4l2_ctrl_ptr ptr2);
/**
* v4l2_ctrl_type_op_init - Default v4l2_ctrl_type_ops init callback.
*
* @ctrl: The v4l2_ctrl pointer.
* @from_idx: Starting element index.
* @elems: The number of elements to initialize.
* @ptr: The v4l2 control value.
*
* Return: void
*/
void v4l2_ctrl_type_op_init(const struct v4l2_ctrl *ctrl, u32 from_idx,
u32 elems, union v4l2_ctrl_ptr ptr);
/**
* v4l2_ctrl_type_op_log - Default v4l2_ctrl_type_ops log callback.
*
* @ctrl: The v4l2_ctrl pointer.
*
* Return: void
*/
void v4l2_ctrl_type_op_log(const struct v4l2_ctrl *ctrl);
/**
* v4l2_ctrl_type_op_validate - Default v4l2_ctrl_type_ops validate callback.
*
* @ctrl: The v4l2_ctrl pointer.
* @elems: The number of elements in the control.
* @ptr: The v4l2 control value.
*
* Return: 0 on success, a negative error code on failure.
*/
int v4l2_ctrl_type_op_validate(const struct v4l2_ctrl *ctrl, u32 elems,
union v4l2_ctrl_ptr ptr);
#endif