V4L/DVB (3281): Added signal detection support to tvp5150

- added signal detection support to tvp5150

Signed-off-by: Markus Rechberger <mrechberger@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/tvp5150.c b/drivers/media/video/tvp5150.c
index 20e6359..3ae8a9f 100644
--- a/drivers/media/video/tvp5150.c
+++ b/drivers/media/video/tvp5150.c
@@ -967,6 +967,17 @@
 		}
 	case DECODER_GET_STATUS:
 		{
+			int *iarg = arg;
+			int status;
+			int res=0;
+			status = tvp5150_read(c, 0x88);
+			if(status&0x08){
+				res |= DECODER_STATUS_COLOR;
+			}
+			if(status&0x04 && status&0x02){
+				res |= DECODER_STATUS_GOOD;
+			}
+			*iarg=res;
 			break;
 		}