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[media] SOLO6x10: Fix video headers on certain hardware

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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>
This commit is contained in:
Krzysztof Hałasa 2013-09-12 08:43:34 -03:00 committed by Mauro Carvalho Chehab
parent 4a61ad3c4a
commit 39e30a22d2
1 changed files with 12 additions and 9 deletions
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21
drivers/staging/media/solo6x10/solo6x10-v4l2-enc.c
View File

@ -472,14 +472,11 @@ static int solo_fill_jpeg(struct solo_enc_dev *solo_enc,
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 @@ static int solo_fill_jpeg(struct solo_enc_dev *solo_enc,
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 @@ static int solo_fill_mpeg(struct solo_enc_dev *solo_enc,
/* 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 @@ static int solo_fill_mpeg(struct solo_enc_dev *solo_enc,
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 @@ static int solo_fill_mpeg(struct solo_enc_dev *solo_enc,
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;
}