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authorRicardo Ribalda Delgado <ribalda@kernel.org>2019-10-07 12:06:29 -0300
committerMauro Carvalho Chehab <mchehab+samsung@kernel.org>2019-10-10 11:34:58 -0300
commitb35d6c02aa3ca88f80c8da099ebabfe426fab759 (patch)
tree89cba39c7977ef44fca3f18a831349ed920a2d33 /include/media
parentmedia: platform: Use devm_platform_ioremap_resource() in two functions (diff)
downloadlinux-dev-b35d6c02aa3ca88f80c8da099ebabfe426fab759.tar.xz
linux-dev-b35d6c02aa3ca88f80c8da099ebabfe426fab759.zip
media: v4l2-core: Implement v4l2_ctrl_new_std_compound
Currently compound controls do not have a simple way of initializing its values. This results in ofuscated code with type_ops init. This patch introduces a new field on the control with the default value for the compound control that can be set with the brand new v4l2_ctrl_new_std_compound function Suggested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Ricardo Ribalda Delgado <ribalda@kernel.org> [hverkuil@xs4all.nl: fix checkpatch warning] Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'include/media')
-rw-r--r--include/media/v4l2-ctrls.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
index 570ff4b0205a..fb0883836548 100644
--- a/include/media/v4l2-ctrls.h
+++ b/include/media/v4l2-ctrls.h
@@ -200,6 +200,9 @@ typedef void (*v4l2_ctrl_notify_fnc)(struct v4l2_ctrl *ctrl, void *priv);
* not freed when the control is deleted. Should this be needed
* then a new internal bitfield can be added to tell the framework
* to free this pointer.
+ * @p_def: The control's default value represented via a union which
+ * provides a standard way of accessing control types
+ * through a pointer (for compound controls only).
* @p_cur: The control's current value represented via a union which
* provides a standard way of accessing control types
* through a pointer.
@@ -254,6 +257,7 @@ struct v4l2_ctrl {
s32 val;
} cur;
+ union v4l2_ctrl_ptr p_def;
union v4l2_ctrl_ptr p_new;
union v4l2_ctrl_ptr p_cur;
};
@@ -647,6 +651,24 @@ struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,
const char * const *qmenu);
/**
+ * v4l2_ctrl_new_std_compound() - Allocate and initialize a new standard V4L2
+ * compound control.
+ *
+ * @hdl: The control handler.
+ * @ops: The control ops.
+ * @id: The control ID.
+ * @p_def: The control's default value.
+ *
+ * Sames as v4l2_ctrl_new_std(), but with support to compound controls, thanks
+ * to the @p_def field.
+ *
+ */
+struct v4l2_ctrl *v4l2_ctrl_new_std_compound(struct v4l2_ctrl_handler *hdl,
+ const struct v4l2_ctrl_ops *ops,
+ u32 id,
+ const union v4l2_ctrl_ptr p_def);
+
+/**
* v4l2_ctrl_new_int_menu() - Create a new standard V4L2 integer menu control.
*
* @hdl: The control handler.