[media] SOLO6x10: Fix video headers on certain hardware
On certain platforms a sequence of dma_map_sg() and dma_unmap_sg()
discards data previously stored in the buffers. Build video headers
only after the DMA is completed.
Signed-off-by: Krzysztof Ha?asa <khalasa@piap.pl>
[hans.verkuil@cisco.com: fix merge problems due to the recent solo sg_table changes]
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
diff --git a/drivers/staging/media/solo6x10/solo6x10-v4l2-enc.c b/drivers/staging/media/solo6x10/solo6x10-v4l2-enc.c
index 9bf878d..51200a3 100644
--- a/drivers/staging/media/solo6x10/solo6x10-v4l2-enc.c
+++ b/drivers/staging/media/solo6x10/solo6x10-v4l2-enc.c
@@ -472,14 +472,11 @@
if (vb2_plane_size(vb, 0) < vop_jpeg_size(vh) + solo_enc->jpeg_len)
return -EIO;
- sg_copy_from_buffer(vbuf->sgl, vbuf->nents,
- solo_enc->jpeg_header,
- solo_enc->jpeg_len);
-
frame_size = (vop_jpeg_size(vh) + solo_enc->jpeg_len + (DMA_ALIGN - 1))
& ~(DMA_ALIGN - 1);
vb2_set_plane_payload(vb, 0, vop_jpeg_size(vh) + solo_enc->jpeg_len);
+ /* may discard all previous data in vbuf->sgl */
dma_map_sg(&solo_dev->pdev->dev, vbuf->sgl, vbuf->nents,
DMA_FROM_DEVICE);
ret = solo_send_desc(solo_enc, solo_enc->jpeg_len, vbuf,
@@ -488,6 +485,11 @@
SOLO_JPEG_EXT_SIZE(solo_dev));
dma_unmap_sg(&solo_dev->pdev->dev, vbuf->sgl, vbuf->nents,
DMA_FROM_DEVICE);
+
+ /* add the header only after dma_unmap_sg() */
+ sg_copy_from_buffer(vbuf->sgl, vbuf->nents,
+ solo_enc->jpeg_header, solo_enc->jpeg_len);
+
return ret;
}
@@ -505,12 +507,7 @@
/* If this is a key frame, add extra header */
if (!vop_type(vh)) {
- sg_copy_from_buffer(vbuf->sgl, vbuf->nents,
- solo_enc->vop,
- solo_enc->vop_len);
-
skip = solo_enc->vop_len;
-
vb->v4l2_buf.flags |= V4L2_BUF_FLAG_KEYFRAME;
vb2_set_plane_payload(vb, 0, vop_mpeg_size(vh) + solo_enc->vop_len);
} else {
@@ -524,6 +521,7 @@
frame_size = (vop_mpeg_size(vh) + skip + (DMA_ALIGN - 1))
& ~(DMA_ALIGN - 1);
+ /* may discard all previous data in vbuf->sgl */
dma_map_sg(&solo_dev->pdev->dev, vbuf->sgl, vbuf->nents,
DMA_FROM_DEVICE);
ret = solo_send_desc(solo_enc, skip, vbuf, frame_off, frame_size,
@@ -531,6 +529,11 @@
SOLO_MP4E_EXT_SIZE(solo_dev));
dma_unmap_sg(&solo_dev->pdev->dev, vbuf->sgl, vbuf->nents,
DMA_FROM_DEVICE);
+
+ /* add the header only after dma_unmap_sg() */
+ if (!vop_type(vh))
+ sg_copy_from_buffer(vbuf->sgl, vbuf->nents,
+ solo_enc->vop, solo_enc->vop_len);
return ret;
}