[media] coda: improve allocation error messages

Produce some error messages when internal buffer allocation
fails, for example because the CMA region is too small.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

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

@@ -1378,8 +1378,10 @@ static int __coda_start_decoding(struct coda_ctx *ctx)
 	}
 
 	ret = coda_alloc_framebuffers(ctx, q_data_dst, src_fourcc);
-	if (ret < 0)
+	if (ret < 0) {
+		v4l2_err(&dev->v4l2_dev, "failed to allocate framebuffers\n");
 		return ret;
+	}
 
 	/* Tell the decoder how many frame buffers we allocated. */
 	coda_write(dev, ctx->num_internal_frames, CODA_CMD_SET_FRAME_BUF_NUM);

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

@@ -971,8 +971,12 @@ int coda_alloc_aux_buf(struct coda_dev *dev, struct coda_aux_buf *buf,
 {
 	buf->vaddr = dma_alloc_coherent(&dev->plat_dev->dev, size, &buf->paddr,
 					GFP_KERNEL);
-	if (!buf->vaddr)
+	if (!buf->vaddr) {
+		v4l2_err(&dev->v4l2_dev,
+			 "Failed to allocate %s buffer of size %u\n",
+			 name, size);
 		return -ENOMEM;
+	}
 
 	buf->size = size;