11 files changed, 223 insertions, 77 deletions

diff --git a/drivers/media/v4l2-core/Kconfig b/drivers/media/v4l2-core/Kconfig
index 65875c3aba1b..976d029e9925 100644
--- a/drivers/media/v4l2-core/Kconfig
+++ b/drivers/media/v4l2-core/Kconfig
@@ -82,3 +82,14 @@ config VIDEOBUF2_DMA_SG
 	#depends on HAS_DMA
 	select VIDEOBUF2_CORE
 	select VIDEOBUF2_MEMOPS
+
+config VIDEO_V4L2_INT_DEVICE
+	tristate "V4L2 int device (DEPRECATED)"
+	depends on VIDEO_V4L2
+	---help---
+	  An early framework for a hardware-independent interface for
+	  image sensors and bridges etc. Currently used by omap24xxcam and
+	  tcm825x drivers that should be converted to V4L2 subdev.
+
+	  Do not use for new developments.
+
diff --git a/drivers/media/v4l2-core/Makefile b/drivers/media/v4l2-core/Makefile
index c2d61d4f03d1..a9d355230e8e 100644
--- a/drivers/media/v4l2-core/Makefile
+++ b/drivers/media/v4l2-core/Makefile
@@ -10,7 +10,8 @@ ifeq ($(CONFIG_COMPAT),y)
   videodev-objs += v4l2-compat-ioctl32.o
 endif
 
-obj-$(CONFIG_VIDEO_DEV) += videodev.o v4l2-int-device.o
+obj-$(CONFIG_VIDEO_DEV) += videodev.o
+obj-$(CONFIG_VIDEO_V4L2_INT_DEVICE) += v4l2-int-device.o
 obj-$(CONFIG_VIDEO_V4L2) += v4l2-common.o
 
 obj-$(CONFIG_VIDEO_TUNER) += tuner.o
diff --git a/drivers/media/v4l2-core/tuner-core.c b/drivers/media/v4l2-core/tuner-core.c
index b5a819af2b8c..b5a8aac2e126 100644
--- a/drivers/media/v4l2-core/tuner-core.c
+++ b/drivers/media/v4l2-core/tuner-core.c
@@ -1013,6 +1013,11 @@ static void set_radio_freq(struct i2c_client *c, unsigned int freq)
 	t->standby = false;
 
 	analog_ops->set_params(&t->fe, &params);
+	/*
+	 * The tuner driver might decide to change the audmode if it only
+	 * supports stereo, so update t->audmode.
+	 */
+	t->audmode = params.audmode;
 }
 
 /*
@@ -1235,8 +1240,18 @@ static int tuner_s_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
 	if (set_mode(t, vt->type))
 		return 0;
 
-	if (t->mode == V4L2_TUNER_RADIO)
+	if (t->mode == V4L2_TUNER_RADIO) {
 		t->audmode = vt->audmode;
+		/*
+		 * For radio audmode can only be mono or stereo. Map any
+		 * other values to stereo. The actual tuner driver that is
+		 * called in set_radio_freq can decide to limit the audmode to
+		 * mono if only mono is supported.
+		 */
+		if (t->audmode != V4L2_TUNER_MODE_MONO &&
+		    t->audmode != V4L2_TUNER_MODE_STEREO)
+			t->audmode = V4L2_TUNER_MODE_STEREO;
+	}
 	set_freq(t, 0);
 
 	return 0;
diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c
index 380ddd89fa4c..aa044f491666 100644
--- a/drivers/media/v4l2-core/v4l2-common.c
+++ b/drivers/media/v4l2-core/v4l2-common.c
@@ -238,7 +238,7 @@ int v4l2_chip_match_host(const struct v4l2_dbg_match *match)
 }
 EXPORT_SYMBOL(v4l2_chip_match_host);
 
-#if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE))
+#if IS_ENABLED(CONFIG_I2C)
 int v4l2_chip_match_i2c_client(struct i2c_client *c, const struct v4l2_dbg_match *match)
 {
 	int len;
@@ -384,7 +384,7 @@ EXPORT_SYMBOL_GPL(v4l2_i2c_subdev_addr);
 const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type)
 {
 	static const unsigned short radio_addrs[] = {
-#if defined(CONFIG_MEDIA_TUNER_TEA5761) || defined(CONFIG_MEDIA_TUNER_TEA5761_MODULE)
+#if IS_ENABLED(CONFIG_MEDIA_TUNER_TEA5761)
 		0x10,
 #endif
 		0x60,
@@ -978,3 +978,13 @@ const struct v4l2_frmsize_discrete *v4l2_find_nearest_format(
 	return best;
 }
 EXPORT_SYMBOL_GPL(v4l2_find_nearest_format);
+
+void v4l2_get_timestamp(struct timeval *tv)
+{
+	struct timespec ts;
+
+	ktime_get_ts(&ts);
+	tv->tv_sec = ts.tv_sec;
+	tv->tv_usec = ts.tv_nsec / NSEC_PER_USEC;
+}
+EXPORT_SYMBOL_GPL(v4l2_get_timestamp);
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index f6ee201d9347..6b28b5800500 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -577,8 +577,6 @@ const char *v4l2_ctrl_get_name(u32 id)
 	case V4L2_CID_GAIN:			return "Gain";
 	case V4L2_CID_HFLIP:			return "Horizontal Flip";
 	case V4L2_CID_VFLIP:			return "Vertical Flip";
-	case V4L2_CID_HCENTER:			return "Horizontal Center";
-	case V4L2_CID_VCENTER:			return "Vertical Center";
 	case V4L2_CID_POWER_LINE_FREQUENCY:	return "Power Line Frequency";
 	case V4L2_CID_HUE_AUTO:			return "Hue, Automatic";
 	case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature";
@@ -1160,8 +1158,7 @@ static int new_to_user(struct v4l2_ext_control *c,
 }
 
 /* Copy the new value to the current value. */
-static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
-						bool update_inactive)
+static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
 {
 	bool changed = false;
 
@@ -1185,8 +1182,8 @@ static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
 		ctrl->cur.val = ctrl->val;
 		break;
 	}
-	if (update_inactive) {
-		/* Note: update_inactive can only be true for auto clusters. */
+	if (ch_flags & V4L2_EVENT_CTRL_CH_FLAGS) {
+		/* Note: CH_FLAGS is only set for auto clusters. */
 		ctrl->flags &=
 			~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE);
 		if (!is_cur_manual(ctrl->cluster[0])) {
@@ -1196,14 +1193,15 @@ static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
 		}
 		fh = NULL;
 	}
-	if (changed || update_inactive) {
+	if (changed || ch_flags) {
 		/* If a control was changed that was not one of the controls
 		   modified by the application, then send the event to all. */
 		if (!ctrl->is_new)
 			fh = NULL;
 		send_event(fh, ctrl,
-			(changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) |
-			(update_inactive ? V4L2_EVENT_CTRL_CH_FLAGS : 0));
+			(changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | ch_flags);
+		if (ctrl->call_notify && changed && ctrl->handler->notify)
+			ctrl->handler->notify(ctrl, ctrl->handler->notify_priv);
 	}
 }
 
@@ -1257,6 +1255,41 @@ static int cluster_changed(struct v4l2_ctrl *master)
 	return diff;
 }
 
+/* Control range checking */
+static int check_range(enum v4l2_ctrl_type type,
+		s32 min, s32 max, u32 step, s32 def)
+{
+	switch (type) {
+	case V4L2_CTRL_TYPE_BOOLEAN:
+		if (step != 1 || max > 1 || min < 0)
+			return -ERANGE;
+		/* fall through */
+	case V4L2_CTRL_TYPE_INTEGER:
+		if (step <= 0 || min > max || def < min || def > max)
+			return -ERANGE;
+		return 0;
+	case V4L2_CTRL_TYPE_BITMASK:
+		if (step || min || !max || (def & ~max))
+			return -ERANGE;
+		return 0;
+	case V4L2_CTRL_TYPE_MENU:
+	case V4L2_CTRL_TYPE_INTEGER_MENU:
+		if (min > max || def < min || def > max)
+			return -ERANGE;
+		/* Note: step == menu_skip_mask for menu controls.
+		   So here we check if the default value is masked out. */
+		if (step && ((1 << def) & step))
+			return -EINVAL;
+		return 0;
+	case V4L2_CTRL_TYPE_STRING:
+		if (min > max || min < 0 || step < 1 || def)
+			return -ERANGE;
+		return 0;
+	default:
+		return 0;
+	}
+}
+
 /* Validate a new control */
 static int validate_new(const struct v4l2_ctrl *ctrl,
 			struct v4l2_ext_control *c)
@@ -1529,30 +1562,21 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
 {
 	struct v4l2_ctrl *ctrl;
 	unsigned sz_extra = 0;
+	int err;
 
 	if (hdl->error)
 		return NULL;
 
 	/* Sanity checks */
 	if (id == 0 || name == NULL || id >= V4L2_CID_PRIVATE_BASE ||
-	    (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;
-	}
-	if (type != V4L2_CTRL_TYPE_BITMASK && max < min) {
+	    (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL)) {
 		handler_set_err(hdl, -ERANGE);
 		return NULL;
 	}
-	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);
+	err = check_range(type, min, max, step, def);
+	if (err) {
+		handler_set_err(hdl, err);
 		return NULL;
 	}
 	if (type == V4L2_CTRL_TYPE_BITMASK && ((def & ~max) || min || step)) {
@@ -1980,6 +2004,13 @@ void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,
 }
 EXPORT_SYMBOL(v4l2_ctrl_handler_log_status);
 
+int v4l2_ctrl_subdev_log_status(struct v4l2_subdev *sd)
+{
+	v4l2_ctrl_handler_log_status(sd->ctrl_handler, sd->name);
+	return 0;
+}
+EXPORT_SYMBOL(v4l2_ctrl_subdev_log_status);
+
 /* Call s_ctrl for all controls owned by the handler */
 int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
 {
@@ -2426,8 +2457,8 @@ EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64);
 /* Core function that calls try/s_ctrl and ensures that the new value is
    copied to the current value on a set.
    Must be called with ctrl->handler->lock held. */
-static int try_or_set_cluster(struct v4l2_fh *fh,
-			      struct v4l2_ctrl *master, bool set)
+static int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
+			      bool set, u32 ch_flags)
 {
 	bool update_flag;
 	int ret;
@@ -2465,7 +2496,8 @@ static int try_or_set_cluster(struct v4l2_fh *fh,
 	/* If OK, then make the new values permanent. */
 	update_flag = is_cur_manual(master) != is_new_manual(master);
 	for (i = 0; i < master->ncontrols; i++)
-		new_to_cur(fh, master->cluster[i], update_flag && i > 0);
+		new_to_cur(fh, master->cluster[i], ch_flags |
+			((update_flag && i > 0) ? V4L2_EVENT_CTRL_CH_FLAGS : 0));
 	return 0;
 }
 
@@ -2592,7 +2624,7 @@ static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
 		} while (!ret && idx);
 
 		if (!ret)
-			ret = try_or_set_cluster(fh, master, set);
+			ret = try_or_set_cluster(fh, master, set, 0);
 
 		/* Copy the new values back to userspace. */
 		if (!ret) {
@@ -2638,10 +2670,9 @@ EXPORT_SYMBOL(v4l2_subdev_s_ext_ctrls);
 
 /* Helper function for VIDIOC_S_CTRL compatibility */
 static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
-		    struct v4l2_ext_control *c)
+		    struct v4l2_ext_control *c, u32 ch_flags)
 {
 	struct v4l2_ctrl *master = ctrl->cluster[0];
-	int ret;
 	int i;
 
 	/* String controls are not supported. The user_to_new() and
@@ -2651,12 +2682,6 @@ static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
 	if (ctrl->type == V4L2_CTRL_TYPE_STRING)
 		return -EINVAL;
 
-	ret = validate_new(ctrl, c);
-	if (ret)
-		return ret;
-
-	v4l2_ctrl_lock(ctrl);
-
 	/* Reset the 'is_new' flags of the cluster */
 	for (i = 0; i < master->ncontrols; i++)
 		if (master->cluster[i])
@@ -2670,10 +2695,22 @@ static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
 		update_from_auto_cluster(master);
 
 	user_to_new(c, ctrl);
-	ret = try_or_set_cluster(fh, master, true);
-	cur_to_user(c, ctrl);
+	return try_or_set_cluster(fh, master, true, ch_flags);
+}
 
-	v4l2_ctrl_unlock(ctrl);
+/* Helper function for VIDIOC_S_CTRL compatibility */
+static int set_ctrl_lock(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
+			 struct v4l2_ext_control *c)
+{
+	int ret = validate_new(ctrl, c);
+
+	if (!ret) {
+		v4l2_ctrl_lock(ctrl);
+		ret = set_ctrl(fh, ctrl, c, 0);
+		if (!ret)
+			cur_to_user(c, ctrl);
+		v4l2_ctrl_unlock(ctrl);
+	}
 	return ret;
 }
 
@@ -2691,7 +2728,7 @@ int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
 		return -EACCES;
 
 	c.value = control->value;
-	ret = set_ctrl(fh, ctrl, &c);
+	ret = set_ctrl_lock(fh, ctrl, &c);
 	control->value = c.value;
 	return ret;
 }
@@ -2710,7 +2747,7 @@ int v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
 	/* It's a driver bug if this happens. */
 	WARN_ON(!type_is_int(ctrl));
 	c.value = val;
-	return set_ctrl(NULL, ctrl, &c);
+	return set_ctrl_lock(NULL, ctrl, &c);
 }
 EXPORT_SYMBOL(v4l2_ctrl_s_ctrl);
 
@@ -2721,10 +2758,61 @@ int v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val)
 	/* It's a driver bug if this happens. */
 	WARN_ON(ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
 	c.value64 = val;
-	return set_ctrl(NULL, ctrl, &c);
+	return set_ctrl_lock(NULL, ctrl, &c);
 }
 EXPORT_SYMBOL(v4l2_ctrl_s_ctrl_int64);
 
+void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv)
+{
+	if (ctrl == NULL)
+		return;
+	if (notify == NULL) {
+		ctrl->call_notify = 0;
+		return;
+	}
+	if (WARN_ON(ctrl->handler->notify && ctrl->handler->notify != notify))
+		return;
+	ctrl->handler->notify = notify;
+	ctrl->handler->notify_priv = priv;
+	ctrl->call_notify = 1;
+}
+EXPORT_SYMBOL(v4l2_ctrl_notify);
+
+int v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl,
+			s32 min, s32 max, u32 step, s32 def)
+{
+	int ret = check_range(ctrl->type, min, max, step, def);
+	struct v4l2_ext_control c;
+
+	switch (ctrl->type) {
+	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:
+		if (ret)
+			return ret;
+		break;
+	default:
+		return -EINVAL;
+	}
+	v4l2_ctrl_lock(ctrl);
+	ctrl->minimum = min;
+	ctrl->maximum = max;
+	ctrl->step = step;
+	ctrl->default_value = def;
+	c.value = ctrl->cur.val;
+	if (validate_new(ctrl, &c))
+		c.value = def;
+	if (c.value != ctrl->cur.val)
+		ret = set_ctrl(NULL, ctrl, &c, V4L2_EVENT_CTRL_CH_RANGE);
+	else
+		send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
+	v4l2_ctrl_unlock(ctrl);
+	return ret;
+}
+EXPORT_SYMBOL(v4l2_ctrl_modify_range);
+
 static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems)
 {
 	struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
@@ -2804,6 +2892,15 @@ int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
 }
 EXPORT_SYMBOL(v4l2_ctrl_subscribe_event);
 
+int v4l2_ctrl_subdev_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
+				     struct v4l2_event_subscription *sub)
+{
+	if (!sd->ctrl_handler)
+		return -EINVAL;
+	return v4l2_ctrl_subscribe_event(fh, sub);
+}
+EXPORT_SYMBOL(v4l2_ctrl_subdev_subscribe_event);
+
 unsigned int v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait)
 {
 	struct v4l2_fh *fh = file->private_data;
diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c
index 98dcad9c8a3b..de1e9ab7db99 100644
--- a/drivers/media/v4l2-core/v4l2-dev.c
+++ b/drivers/media/v4l2-core/v4l2-dev.c
@@ -222,7 +222,7 @@ static struct class video_class = {
 
 struct video_device *video_devdata(struct file *file)
 {
-	return video_device[iminor(file->f_path.dentry->d_inode)];
+	return video_device[iminor(file_inode(file))];
 }
 EXPORT_SYMBOL(video_devdata);
 
@@ -568,11 +568,6 @@ static void determine_valid_ioctls(struct video_device *vdev)
 	if (ops->vidioc_s_priority ||
 			test_bit(V4L2_FL_USE_FH_PRIO, &vdev->flags))
 		set_bit(_IOC_NR(VIDIOC_S_PRIORITY), valid_ioctls);
-	SET_VALID_IOCTL(ops, VIDIOC_REQBUFS, vidioc_reqbufs);
-	SET_VALID_IOCTL(ops, VIDIOC_QUERYBUF, vidioc_querybuf);
-	SET_VALID_IOCTL(ops, VIDIOC_QBUF, vidioc_qbuf);
-	SET_VALID_IOCTL(ops, VIDIOC_EXPBUF, vidioc_expbuf);
-	SET_VALID_IOCTL(ops, VIDIOC_DQBUF, vidioc_dqbuf);
 	SET_VALID_IOCTL(ops, VIDIOC_STREAMON, vidioc_streamon);
 	SET_VALID_IOCTL(ops, VIDIOC_STREAMOFF, vidioc_streamoff);
 	/* Note: the control handler can also be passed through the filehandle,
@@ -605,8 +600,6 @@ static void determine_valid_ioctls(struct video_device *vdev)
 	SET_VALID_IOCTL(ops, VIDIOC_DQEVENT, vidioc_subscribe_event);
 	SET_VALID_IOCTL(ops, VIDIOC_SUBSCRIBE_EVENT, vidioc_subscribe_event);
 	SET_VALID_IOCTL(ops, VIDIOC_UNSUBSCRIBE_EVENT, vidioc_unsubscribe_event);
-	SET_VALID_IOCTL(ops, VIDIOC_CREATE_BUFS, vidioc_create_bufs);
-	SET_VALID_IOCTL(ops, VIDIOC_PREPARE_BUF, vidioc_prepare_buf);
 	if (ops->vidioc_enum_freq_bands || ops->vidioc_g_tuner || ops->vidioc_g_modulator)
 		set_bit(_IOC_NR(VIDIOC_ENUM_FREQ_BANDS), valid_ioctls);
 
@@ -672,6 +665,13 @@ static void determine_valid_ioctls(struct video_device *vdev)
 	}
 	if (!is_radio) {
 		/* ioctls valid for video or vbi */
+		SET_VALID_IOCTL(ops, VIDIOC_REQBUFS, vidioc_reqbufs);
+		SET_VALID_IOCTL(ops, VIDIOC_QUERYBUF, vidioc_querybuf);
+		SET_VALID_IOCTL(ops, VIDIOC_QBUF, vidioc_qbuf);
+		SET_VALID_IOCTL(ops, VIDIOC_EXPBUF, vidioc_expbuf);
+		SET_VALID_IOCTL(ops, VIDIOC_DQBUF, vidioc_dqbuf);
+		SET_VALID_IOCTL(ops, VIDIOC_CREATE_BUFS, vidioc_create_bufs);
+		SET_VALID_IOCTL(ops, VIDIOC_PREPARE_BUF, vidioc_prepare_buf);
 		if (ops->vidioc_s_std)
 			set_bit(_IOC_NR(VIDIOC_ENUMSTD), valid_ioctls);
 		if (ops->vidioc_g_std || vdev->current_norm)
diff --git a/drivers/media/v4l2-core/v4l2-device.c b/drivers/media/v4l2-core/v4l2-device.c
index 513969fa695d..8ed5da2170bf 100644
--- a/drivers/media/v4l2-core/v4l2-device.c
+++ b/drivers/media/v4l2-core/v4l2-device.c
@@ -112,7 +112,7 @@ void v4l2_device_unregister(struct v4l2_device *v4l2_dev)
 	/* Unregister subdevs */
 	list_for_each_entry_safe(sd, next, &v4l2_dev->subdevs, list) {
 		v4l2_device_unregister_subdev(sd);
-#if defined(CONFIG_I2C) || (defined(CONFIG_I2C_MODULE) && defined(MODULE))
+#if IS_ENABLED(CONFIG_I2C)
 		if (sd->flags & V4L2_SUBDEV_FL_IS_I2C) {
 			struct i2c_client *client = v4l2_get_subdevdata(sd);
 
@@ -159,31 +159,21 @@ int v4l2_device_register_subdev(struct v4l2_device *v4l2_dev,
 	sd->v4l2_dev = v4l2_dev;
 	if (sd->internal_ops && sd->internal_ops->registered) {
 		err = sd->internal_ops->registered(sd);
-		if (err) {
-			module_put(sd->owner);
-			return err;
-		}
+		if (err)
+			goto error_module;
 	}
 
 	/* This just returns 0 if either of the two args is NULL */
 	err = v4l2_ctrl_add_handler(v4l2_dev->ctrl_handler, sd->ctrl_handler, NULL);
-	if (err) {
-		if (sd->internal_ops && sd->internal_ops->unregistered)
-			sd->internal_ops->unregistered(sd);
-		module_put(sd->owner);
-		return err;
-	}
+	if (err)
+		goto error_unregister;
 
 #if defined(CONFIG_MEDIA_CONTROLLER)
 	/* Register the entity. */
 	if (v4l2_dev->mdev) {
 		err = media_device_register_entity(v4l2_dev->mdev, entity);
-		if (err < 0) {
-			if (sd->internal_ops && sd->internal_ops->unregistered)
-				sd->internal_ops->unregistered(sd);
-			module_put(sd->owner);
-			return err;
-		}
+		if (err < 0)
+			goto error_unregister;
 	}
 #endif
 
@@ -192,6 +182,14 @@ int v4l2_device_register_subdev(struct v4l2_device *v4l2_dev,
 	spin_unlock(&v4l2_dev->lock);
 
 	return 0;
+
+error_unregister:
+	if (sd->internal_ops && sd->internal_ops->unregistered)
+		sd->internal_ops->unregistered(sd);
+error_module:
+	module_put(sd->owner);
+	sd->v4l2_dev = NULL;
+	return err;
 }
 EXPORT_SYMBOL_GPL(v4l2_device_register_subdev);
 
diff --git a/drivers/media/v4l2-core/v4l2-event.c b/drivers/media/v4l2-core/v4l2-event.c
index c72009218152..86dcb5483c42 100644
--- a/drivers/media/v4l2-core/v4l2-event.c
+++ b/drivers/media/v4l2-core/v4l2-event.c
@@ -311,3 +311,10 @@ int v4l2_event_unsubscribe(struct v4l2_fh *fh,
 	return 0;
 }
 EXPORT_SYMBOL_GPL(v4l2_event_unsubscribe);
+
+int v4l2_event_subdev_unsubscribe(struct v4l2_subdev *sd, struct v4l2_fh *fh,
+				  struct v4l2_event_subscription *sub)
+{
+	return v4l2_event_unsubscribe(fh, sub);
+}
+EXPORT_SYMBOL_GPL(v4l2_event_subdev_unsubscribe);
diff --git a/drivers/media/v4l2-core/v4l2-mem2mem.c b/drivers/media/v4l2-core/v4l2-mem2mem.c
index 438ea45d1074..da99cf727162 100644
--- a/drivers/media/v4l2-core/v4l2-mem2mem.c
+++ b/drivers/media/v4l2-core/v4l2-mem2mem.c
@@ -62,7 +62,7 @@ struct v4l2_m2m_dev {
 	struct list_head	job_queue;
 	spinlock_t		job_spinlock;
 
-	struct v4l2_m2m_ops	*m2m_ops;
+	const struct v4l2_m2m_ops *m2m_ops;
 };
 
 static struct v4l2_m2m_queue_ctx *get_queue_ctx(struct v4l2_m2m_ctx *m2m_ctx,
@@ -519,7 +519,7 @@ EXPORT_SYMBOL(v4l2_m2m_mmap);
  *
  * Usually called from driver's probe() function.
  */
-struct v4l2_m2m_dev *v4l2_m2m_init(struct v4l2_m2m_ops *m2m_ops)
+struct v4l2_m2m_dev *v4l2_m2m_init(const struct v4l2_m2m_ops *m2m_ops)
 {
 	struct v4l2_m2m_dev *m2m_dev;
 
diff --git a/drivers/media/v4l2-core/videobuf-core.c b/drivers/media/v4l2-core/videobuf-core.c
index 5449e8aa984a..fb5ee5dd8fe9 100644
--- a/drivers/media/v4l2-core/videobuf-core.c
+++ b/drivers/media/v4l2-core/videobuf-core.c
@@ -340,7 +340,7 @@ static void videobuf_status(struct videobuf_queue *q, struct v4l2_buffer *b,
 		break;
 	}
 
-	b->flags    = 0;
+	b->flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 	if (vb->map)
 		b->flags |= V4L2_BUF_FLAG_MAPPED;
 
diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
index e02c4797b1c6..db1235dcb328 100644
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -40,9 +40,10 @@ module_param(debug, int, 0644);
 #define call_qop(q, op, args...)					\
 	(((q)->ops->op) ? ((q)->ops->op(args)) : 0)
 
-#define V4L2_BUFFER_STATE_FLAGS	(V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_QUEUED | \
+#define V4L2_BUFFER_MASK_FLAGS	(V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_QUEUED | \
 				 V4L2_BUF_FLAG_DONE | V4L2_BUF_FLAG_ERROR | \
-				 V4L2_BUF_FLAG_PREPARED)
+				 V4L2_BUF_FLAG_PREPARED | \
+				 V4L2_BUF_FLAG_TIMESTAMP_MASK)
 
 /**
  * __vb2_buf_mem_alloc() - allocate video memory for the given buffer
@@ -401,7 +402,8 @@ static void __fill_v4l2_buffer(struct vb2_buffer *vb, struct v4l2_buffer *b)
 	/*
 	 * Clear any buffer state related flags.
 	 */
-	b->flags &= ~V4L2_BUFFER_STATE_FLAGS;
+	b->flags &= ~V4L2_BUFFER_MASK_FLAGS;
+	b->flags |= V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 
 	switch (vb->state) {
 	case VB2_BUF_STATE_QUEUED:
@@ -941,7 +943,7 @@ static void __fill_vb2_buffer(struct vb2_buffer *vb, const struct v4l2_buffer *b
 
 	vb->v4l2_buf.field = b->field;
 	vb->v4l2_buf.timestamp = b->timestamp;
-	vb->v4l2_buf.flags = b->flags & ~V4L2_BUFFER_STATE_FLAGS;
+	vb->v4l2_buf.flags = b->flags & ~V4L2_BUFFER_MASK_FLAGS;
 }
 
 /**
@@ -1963,6 +1965,11 @@ unsigned int vb2_poll(struct vb2_queue *q, struct file *file, poll_table *wait)
 			poll_wait(file, &fh->wait, wait);
 	}
 
+	if (!V4L2_TYPE_IS_OUTPUT(q->type) && !(req_events & (POLLIN | POLLRDNORM)))
+		return res;
+	if (V4L2_TYPE_IS_OUTPUT(q->type) && !(req_events & (POLLOUT | POLLWRNORM)))
+		return res;
+
 	/*
 	 * Start file I/O emulator only if streaming API has not been used yet.
 	 */