media: i2c: st_mipid02: cascade s_stream call to the source subdev

Cascade the s_stream call to the source subdev whenever the bridge
streaming is enable / disabled.

Signed-off-by: Alain Volmat <[e-mail]>
Reviewed-by: Benjamin Mugnier <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>

drivers/media/i2c/st-mipid02.c

···
 static int mipid02_stream_disable(struct mipid02_dev *bridge)
 {
 	struct i2c_client *client = bridge->i2c_client;
-	int ret;
+	int ret = -EINVAL;
+
+	if (!bridge->s_subdev)
+		goto error;
+
+	ret = v4l2_subdev_call(bridge->s_subdev, video, s_stream, 0);
+	if (ret)
+		goto error;
 
 	/* Disable all lanes */
 	ret = mipid02_write_reg(bridge, MIPID02_CLK_LANE_REG1, 0);
···
 		goto error;
 	ret = mipid02_write_reg(bridge, MIPID02_PIX_WIDTH_CTRL_EMB,
 		bridge->r.pix_width_ctrl_emb);
+	if (ret)
+		goto error;
+
+	ret = v4l2_subdev_call(bridge->s_subdev, video, s_stream, 1);
 	if (ret)
 		goto error;