[media] v4l: Introduce integer menu controls

Create a new control type called V4L2_CTRL_TYPE_INTEGER_MENU. Integer menu
controls are just like menu controls but the menu items are 64-bit integers
rather than strings.
Signed-off-by: NSakari Ailus <sakari.ailus@iki.fi>
Acked-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: NSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/v4l2-ctrls.c

@@ -852,7 +852,8 @@ static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 change
 		ev->u.ctrl.value64 = ctrl->cur.val64;
 	ev->u.ctrl.minimum = ctrl->minimum;
 	ev->u.ctrl.maximum = ctrl->maximum;
-	if (ctrl->type == V4L2_CTRL_TYPE_MENU)
+	if (ctrl->type == V4L2_CTRL_TYPE_MENU
+	    || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
 		ev->u.ctrl.step = 1;
 	else
 		ev->u.ctrl.step = ctrl->step;
@@ -1083,10 +1084,13 @@ static int validate_new_int(const struct v4l2_ctrl *ctrl, s32 *pval)
 		return 0;
 
 	case V4L2_CTRL_TYPE_MENU:
+	case V4L2_CTRL_TYPE_INTEGER_MENU:
 		if (val < ctrl->minimum || val > ctrl->maximum)
 			return -ERANGE;
-		if (ctrl->qmenu[val][0] == '\0' ||
-		    (ctrl->menu_skip_mask & (1 << val)))
+		if (ctrl->menu_skip_mask & (1 << val))
+			return -EINVAL;
+		if (ctrl->type == V4L2_CTRL_TYPE_MENU &&
+		    ctrl->qmenu[val][0] == '\0')
 			return -EINVAL;
 		return 0;
 
@@ -1114,6 +1118,7 @@ static int validate_new(const struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c
 	case V4L2_CTRL_TYPE_INTEGER:
 	case V4L2_CTRL_TYPE_BOOLEAN:
 	case V4L2_CTRL_TYPE_MENU:
+	case V4L2_CTRL_TYPE_INTEGER_MENU:
 	case V4L2_CTRL_TYPE_BITMASK:
 	case V4L2_CTRL_TYPE_BUTTON:
 	case V4L2_CTRL_TYPE_CTRL_CLASS:
@@ -1343,7 +1348,8 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
 			const struct v4l2_ctrl_ops *ops,
 			u32 id, const char *name, enum v4l2_ctrl_type type,
 			s32 min, s32 max, u32 step, s32 def,
-			u32 flags, const char * const *qmenu, void *priv)
+			u32 flags, const char * const *qmenu,
+			const s64 *qmenu_int, void *priv)
 {
 	struct v4l2_ctrl *ctrl;
 	unsigned sz_extra = 0;
@@ -1356,6 +1362,7 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
 	    (type == V4L2_CTRL_TYPE_INTEGER && step == 0) ||
 	    (type == V4L2_CTRL_TYPE_BITMASK && max == 0) ||
 	    (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
+	    (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL) ||
 	    (type == V4L2_CTRL_TYPE_STRING && max == 0)) {
 		handler_set_err(hdl, -ERANGE);
 		return NULL;
@@ -1366,6 +1373,7 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
 	}
 	if ((type == V4L2_CTRL_TYPE_INTEGER ||
 	     type == V4L2_CTRL_TYPE_MENU ||
+	     type == V4L2_CTRL_TYPE_INTEGER_MENU ||
 	     type == V4L2_CTRL_TYPE_BOOLEAN) &&
 	    (def < min || def > max)) {
 		handler_set_err(hdl, -ERANGE);
@@ -1400,7 +1408,10 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
 	ctrl->minimum = min;
 	ctrl->maximum = max;
 	ctrl->step = step;
-	ctrl->qmenu = qmenu;
+	if (type == V4L2_CTRL_TYPE_MENU)
+		ctrl->qmenu = qmenu;
+	else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
+		ctrl->qmenu_int = qmenu_int;
 	ctrl->priv = priv;
 	ctrl->cur.val = ctrl->val = ctrl->default_value = def;
 
@@ -1427,6 +1438,7 @@ struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
 	struct v4l2_ctrl *ctrl;
 	const char *name = cfg->name;
 	const char * const *qmenu = cfg->qmenu;
+	const s64 *qmenu_int = cfg->qmenu_int;
 	enum v4l2_ctrl_type type = cfg->type;
 	u32 flags = cfg->flags;
 	s32 min = cfg->min;
@@ -1438,18 +1450,24 @@ struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
 		v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step,
 								&def, &flags);
 
-	is_menu = (cfg->type == V4L2_CTRL_TYPE_MENU);
+	is_menu = (cfg->type == V4L2_CTRL_TYPE_MENU ||
+		   cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU);
 	if (is_menu)
 		WARN_ON(step);
 	else
 		WARN_ON(cfg->menu_skip_mask);
-	if (is_menu && qmenu == NULL)
+	if (cfg->type == V4L2_CTRL_TYPE_MENU && qmenu == NULL)
 		qmenu = v4l2_ctrl_get_menu(cfg->id);
+	else if (cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU &&
+		 qmenu_int == NULL) {
+		handler_set_err(hdl, -EINVAL);
+		return NULL;
+	}
 
 	ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->id, name,
 			type, min, max,
 			is_menu ? cfg->menu_skip_mask : step,
-			def, flags, qmenu, priv);
+			def, flags, qmenu, qmenu_int, priv);
 	if (ctrl)
 		ctrl->is_private = cfg->is_private;
 	return ctrl;
@@ -1466,12 +1484,13 @@ struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
 	u32 flags;
 
 	v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
-	if (type == V4L2_CTRL_TYPE_MENU) {
+	if (type == V4L2_CTRL_TYPE_MENU
+	    || type == V4L2_CTRL_TYPE_INTEGER_MENU) {
 		handler_set_err(hdl, -EINVAL);
 		return NULL;
 	}
 	return v4l2_ctrl_new(hdl, ops, id, name, type,
-				    min, max, step, def, flags, NULL, NULL);
+			     min, max, step, def, flags, NULL, NULL, NULL);
 }
 EXPORT_SYMBOL(v4l2_ctrl_new_std);
 
@@ -1493,7 +1512,7 @@ struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
 		return NULL;
 	}
 	return v4l2_ctrl_new(hdl, ops, id, name, type,
-				    0, max, mask, def, flags, qmenu, NULL);
+			     0, max, mask, def, flags, qmenu, NULL, NULL);
 }
 EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
 
@@ -1659,6 +1678,9 @@ static void log_ctrl(const struct v4l2_ctrl *ctrl,
 	case V4L2_CTRL_TYPE_MENU:
 		printk(KERN_CONT "%s", ctrl->qmenu[ctrl->cur.val]);
 		break;
+	case V4L2_CTRL_TYPE_INTEGER_MENU:
+		printk(KERN_CONT "%lld", ctrl->qmenu_int[ctrl->cur.val]);
+		break;
 	case V4L2_CTRL_TYPE_BITMASK:
 		printk(KERN_CONT "0x%08x", ctrl->cur.val);
 		break;
@@ -1795,7 +1817,8 @@ int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
 	qc->minimum = ctrl->minimum;
 	qc->maximum = ctrl->maximum;
 	qc->default_value = ctrl->default_value;
-	if (ctrl->type == V4L2_CTRL_TYPE_MENU)
+	if (ctrl->type == V4L2_CTRL_TYPE_MENU
+	    || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
 		qc->step = 1;
 	else
 		qc->step = ctrl->step;
@@ -1825,16 +1848,33 @@ int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)
 
 	qm->reserved = 0;
 	/* Sanity checks */
-	if (ctrl->qmenu == NULL ||
-	    i < ctrl->minimum || i > ctrl->maximum)
+	switch (ctrl->type) {
+	case V4L2_CTRL_TYPE_MENU:
+		if (ctrl->qmenu == NULL)
+			return -EINVAL;
+		break;
+	case V4L2_CTRL_TYPE_INTEGER_MENU:
+		if (ctrl->qmenu_int == NULL)
+			return -EINVAL;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (i < ctrl->minimum || i > ctrl->maximum)
 		return -EINVAL;
+
 	/* Use mask to see if this menu item should be skipped */
 	if (ctrl->menu_skip_mask & (1 << i))
 		return -EINVAL;
 	/* Empty menu items should also be skipped */
-	if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0')
-		return -EINVAL;
-	strlcpy(qm->name, ctrl->qmenu[i], sizeof(qm->name));
+	if (ctrl->type == V4L2_CTRL_TYPE_MENU) {
+		if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0')
+			return -EINVAL;
+		strlcpy(qm->name, ctrl->qmenu[i], sizeof(qm->name));
+	} else {
+		qm->value = ctrl->qmenu_int[i];
+	}
 	return 0;
 }
 EXPORT_SYMBOL(v4l2_querymenu);

include/linux/videodev2.h

@@ -1151,6 +1151,7 @@ enum v4l2_ctrl_type {
 	V4L2_CTRL_TYPE_CTRL_CLASS    = 6,
 	V4L2_CTRL_TYPE_STRING        = 7,
 	V4L2_CTRL_TYPE_BITMASK       = 8,
+	V4L2_CTRL_TYPE_INTEGER_MENU = 9,
 };
 
 /*  Used in the VIDIOC_QUERYCTRL ioctl for querying controls */
@@ -1170,7 +1171,10 @@ struct v4l2_queryctrl {
 struct v4l2_querymenu {
 	__u32		id;
 	__u32		index;
-	__u8		name[32];	/* Whatever */
+	union {
+		__u8	name[32];	/* Whatever */
+		__s64	value;
+	};
 	__u32		reserved;
 };
 

include/media/v4l2-ctrls.h

@@ -130,7 +130,10 @@ struct v4l2_ctrl {
 		u32 step;
 		u32 menu_skip_mask;
 	};
-	const char * const *qmenu;
+	union {
+		const char * const *qmenu;
+		const s64 *qmenu_int;
+	};
 	unsigned long flags;
 	union {
 		s32 val;
@@ -220,6 +223,7 @@ struct v4l2_ctrl_config {
 	u32 flags;
 	u32 menu_skip_mask;
 	const char * const *qmenu;
+	const s64 *qmenu_int;
 	unsigned int is_private:1;
 };