Fixed point controls are used by the user to configure
a fixed point value in 64bits, which Q31.32 format.
Signed-off-by: Shengjiu Wang <shengjiu.wang@xxxxxxx>
---
Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst | 6 ++++++
.../userspace-api/media/videodev2.h.rst.exceptions | 1 +
drivers/media/v4l2-core/v4l2-ctrls-api.c | 5 ++++-
drivers/media/v4l2-core/v4l2-ctrls-core.c | 2 ++
include/uapi/linux/videodev2.h | 1 +
5 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst b/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
index 4d38acafe8e1..2e15db0779f2 100644
--- a/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
+++ b/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
@@ -549,6 +549,12 @@ See also the examples in :ref:`control`.
- n/a
- A struct :c:type:`v4l2_ctrl_av1_film_grain`, containing AV1 Film Grain
parameters for stateless video decoders.
+ * - ``V4L2_CTRL_TYPE_FIXED_POINT``
+ - n/a
+ - n/a
+ - n/a
+ - A struct :c:type:`v4l2_ctrl_fixed_point`, containing parameter which is
+ Q31.32 format.
.. raw:: latex
diff --git a/Documentation/userspace-api/media/videodev2.h.rst.exceptions b/Documentation/userspace-api/media/videodev2.h.rst.exceptions
index e61152bb80d1..2faa5a2015eb 100644
--- a/Documentation/userspace-api/media/videodev2.h.rst.exceptions
+++ b/Documentation/userspace-api/media/videodev2.h.rst.exceptions
@@ -167,6 +167,7 @@ replace symbol V4L2_CTRL_TYPE_AV1_SEQUENCE :c:type:`v4l2_ctrl_type`
replace symbol V4L2_CTRL_TYPE_AV1_TILE_GROUP_ENTRY :c:type:`v4l2_ctrl_type`
replace symbol V4L2_CTRL_TYPE_AV1_FRAME :c:type:`v4l2_ctrl_type`
replace symbol V4L2_CTRL_TYPE_AV1_FILM_GRAIN :c:type:`v4l2_ctrl_type`
+replace symbol V4L2_CTRL_TYPE_FIXED_POINT :c:type:`v4l2_ctrl_type`
# V4L2 capability defines
replace define V4L2_CAP_VIDEO_CAPTURE device-capabilities
diff --git a/drivers/media/v4l2-core/v4l2-ctrls-api.c b/drivers/media/v4l2-core/v4l2-ctrls-api.c
index 002ea6588edf..e6a0fb8d6791 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls-api.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls-api.c
@@ -57,6 +57,7 @@ static int ptr_to_user(struct v4l2_ext_control *c,
return copy_to_user(c->string, ptr.p_char, len + 1) ?
-EFAULT : 0;
case V4L2_CTRL_TYPE_INTEGER64:
+ case V4L2_CTRL_TYPE_FIXED_POINT:
c->value64 = *ptr.p_s64;
break;
default:
@@ -132,6 +133,7 @@ static int user_to_new(struct v4l2_ext_control *c, struct v4l2_ctrl *ctrl)
switch (ctrl->type) {
case V4L2_CTRL_TYPE_INTEGER64:
+ case V4L2_CTRL_TYPE_FIXED_POINT:
*ctrl->p_new.p_s64 = c->value64;
break;
case V4L2_CTRL_TYPE_STRING:
@@ -540,7 +542,8 @@ static int validate_ctrls(struct v4l2_ext_controls *cs,
*/
if (ctrl->is_ptr)
continue;
- if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
+ if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64 ||
+ ctrl->type == V4L2_CTRL_TYPE_FIXED_POINT)
p_new.p_s64 = &cs->controls[i].value64;
else
p_new.p_s32 = &cs->controls[i].value;
diff --git a/drivers/media/v4l2-core/v4l2-ctrls-core.c b/drivers/media/v4l2-core/v4l2-ctrls-core.c
index a662fb60f73f..9d50df0d9874 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls-core.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls-core.c
@@ -1187,6 +1187,7 @@ static int std_validate_elem(const struct v4l2_ctrl *ctrl, u32 idx,
case V4L2_CTRL_TYPE_INTEGER:
return ROUND_TO_RANGE(ptr.p_s32[idx], u32, ctrl);
case V4L2_CTRL_TYPE_INTEGER64:
+ case V4L2_CTRL_TYPE_FIXED_POINT:
/*
* We can't use the ROUND_TO_RANGE define here due to
* the u64 divide that needs special care.
@@ -1779,6 +1780,7 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
/* Prefill elem_size for all types handled by std_type_ops */
switch ((u32)type) {
case V4L2_CTRL_TYPE_INTEGER64:
+ case V4L2_CTRL_TYPE_FIXED_POINT:
elem_size = sizeof(s64);
break;
case V4L2_CTRL_TYPE_STRING:
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 4ef08b3a9e39..ef8913d561bf 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -1903,6 +1903,7 @@ enum v4l2_ctrl_type {
V4L2_CTRL_TYPE_STRING = 7,
V4L2_CTRL_TYPE_BITMASK = 8,
V4L2_CTRL_TYPE_INTEGER_MENU = 9,
+ V4L2_CTRL_TYPE_FIXED_POINT = 10,
/* Compound types are >= 0x0100 */
V4L2_CTRL_COMPOUND_TYPES = 0x0100,
--
2.34.1
