[media] ARM mx3_camera: check for DMA engine type

We have two dma engines in MX3 systems: The IPU and the SDMA
engine. We have to check if we got a channel from the correct
engine before proceeding with a channel.
Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/mx3_camera.c

@@ -27,6 +27,7 @@
 
 #include <mach/ipu.h>
 #include <mach/mx3_camera.h>
+#include <mach/dma.h>
 
 #define MX3_CAM_DRV_NAME "mx3-camera"
 
@@ -638,6 +639,9 @@ static bool chan_filter(struct dma_chan *chan, void *arg)
 	struct dma_chan_request *rq = arg;
 	struct mx3_camera_pdata *pdata;
 
+	if (!imx_dma_is_ipu(chan))
+		return false;
+
 	if (!rq)
 		return false;