The data_offset in v4l2_planes structure will help us point to the start of
data content for that particular plane. This may be useful when a single
buffer contains the data for different planes e.g. Y planes of two fields in
the same buffer. With this, user space can pass queue top field and
bottom field with same dmafd and different data_offsets.
Signed-off-by: Nikhil Devshatwar <nikhil.nd@xxxxxx>
---
Changes from v2:
* Use data_offset only for OUTPUT stream buffers
drivers/media/platform/ti-vpe/vpe.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/media/platform/ti-vpe/vpe.c b/drivers/media/platform/ti-vpe/vpe.c
index 9a081c2..ba26b83 100644
--- a/drivers/media/platform/ti-vpe/vpe.c
+++ b/drivers/media/platform/ti-vpe/vpe.c
@@ -496,6 +496,14 @@ struct vpe_mmr_adb {
#define VPE_SET_MMR_ADB_HDR(ctx, hdr, regs, offset_a) \
VPDMA_SET_MMR_ADB_HDR(ctx->mmr_adb, vpe_mmr_adb, hdr, regs, offset_a)
+
+static inline dma_addr_t vb2_dma_addr_plus_data_offset(struct vb2_buffer *vb,
+ unsigned int plane_no)
+{
+ return vb2_dma_contig_plane_dma_addr(vb, plane_no) +
+ vb->v4l2_planes[plane_no].data_offset;
+}
+
/*
* Set the headers for all of the address/data block structures.
*/
@@ -1043,7 +1051,7 @@ static void add_in_dtd(struct vpe_ctx *ctx, int port)
vpdma_fmt = fmt->vpdma_fmt[plane];
- dma_addr = vb2_dma_contig_plane_dma_addr(vb, plane);
+ dma_addr = vb2_dma_addr_plus_data_offset(vb, plane);
if (!dma_addr) {
vpe_err(ctx->dev,
"acquiring input buffer(%d) dma_addr failed\n",
--
1.7.9.5
--
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