V4L/DVB (4197): Port new MPEG API to saa7134-empress with saa6752hs

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/saa7134/saa7134-empress.c

@@ -64,8 +64,10 @@ static void ts_reset_encoder(struct saa7134_dev* dev)
 
 static int ts_init_encoder(struct saa7134_dev* dev)
 {
+	struct v4l2_ext_controls ctrls = { V4L2_CTRL_CLASS_MPEG, 0 };
+
 	ts_reset_encoder(dev);
-	saa7134_i2c_call_clients(dev, VIDIOC_S_MPEGCOMP, NULL);
+	saa7134_i2c_call_clients(dev, VIDIOC_S_EXT_CTRLS, &ctrls);
 	dev->empress_started = 1;
 	return 0;
 }
@@ -162,6 +164,7 @@ static int ts_do_ioctl(struct inode *inode, struct file *file,
 		       unsigned int cmd, void *arg)
 {
 	struct saa7134_dev *dev = file->private_data;
+	struct v4l2_ext_controls *ctrls = arg;
 
 	if (debug > 1)
 		v4l_print_ioctl(dev->name,cmd);
@@ -284,6 +287,21 @@ static int ts_do_ioctl(struct inode *inode, struct file *file,
 	case VIDIOC_G_MPEGCOMP:
 		saa7134_i2c_call_clients(dev, VIDIOC_G_MPEGCOMP, arg);
 		return 0;
+	case VIDIOC_S_EXT_CTRLS:
+		/* count == 0 is abused in saa6752hs.c, so that special
+		   case is handled here explicitly. */
+		if (ctrls->count == 0)
+			return 0;
+		if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
+			return -EINVAL;
+		saa7134_i2c_call_clients(dev, VIDIOC_S_EXT_CTRLS, arg);
+		ts_init_encoder(dev);
+		return 0;
+	case VIDIOC_G_EXT_CTRLS:
+		if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
+			return -EINVAL;
+		saa7134_i2c_call_clients(dev, VIDIOC_G_EXT_CTRLS, arg);
+		return 0;
 
 	default:
 		return -ENOIOCTLCMD;