[media] coda: switch BIT decoder source queue to vmalloc

Since we have to copy from input buffers into the bitstream ringbuffer
with the CPU, there is no need for contiguous DMA buffers on the decoder
input side.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/platform/Kconfig

@@ -141,6 +141,7 @@ config VIDEO_CODA
 	depends on HAS_DMA
 	select SRAM
 	select VIDEOBUF2_DMA_CONTIG
+	select VIDEOBUF2_VMALLOC
 	select V4L2_MEM2MEM_DEV
 	select GENERIC_ALLOCATOR
 	---help---

drivers/media/platform/coda/coda-common.c

@@ -37,6 +37,7 @@
 #include <media/v4l2-mem2mem.h>
 #include <media/videobuf2-core.h>
 #include <media/videobuf2-dma-contig.h>
+#include <media/videobuf2-vmalloc.h>
 
 #include "coda.h"
 
@@ -1121,6 +1122,7 @@ static int coda_queue_setup(struct vb2_queue *vq,
 	*nplanes = 1;
 	sizes[0] = size;
 
+	/* Set to vb2-dma-contig allocator context, ignored by vb2-vmalloc */
 	alloc_ctxs[0] = ctx->dev->alloc_ctx;
 
 	v4l2_dbg(1, coda_debug, &ctx->dev->v4l2_dev,
@@ -1567,8 +1569,8 @@ int coda_decoder_queue_init(void *priv, struct vb2_queue *src_vq,
 	int ret;
 
 	src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
-	src_vq->io_modes = VB2_DMABUF | VB2_MMAP;
-	src_vq->mem_ops = &vb2_dma_contig_memops;
+	src_vq->io_modes = VB2_DMABUF | VB2_MMAP | VB2_USERPTR;
+	src_vq->mem_ops = &vb2_vmalloc_memops;
 
 	ret = coda_queue_init(priv, src_vq);
 	if (ret)