[media] coda: relax coda_jpeg_check_buffer for trailing bytes
coda_jpeg_check_buffer only cares about the buffer length and contents,
so change the parameter type back from v4l2_vb2_buffer to just the
vb2_buffer.
Instead of just checking the first and last bytes for the SOI and EOI
markers, relax the EOI marker check a bit and allow up to 32 trailing
bytes after the EOI marker as hardware generated JPEGs sometimes contain
some alignment overhead.
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>
diff --git a/drivers/media/platform/coda/coda-jpeg.c b/drivers/media/platform/coda/coda-jpeg.c
index 96cd42a..9f899a6 100644
--- a/drivers/media/platform/coda/coda-jpeg.c
+++ b/drivers/media/platform/coda/coda-jpeg.c
@@ -178,14 +178,28 @@
return 0;
}
-bool coda_jpeg_check_buffer(struct coda_ctx *ctx, struct vb2_v4l2_buffer *vb)
+bool coda_jpeg_check_buffer(struct coda_ctx *ctx, struct vb2_buffer *vb)
{
- void *vaddr = vb2_plane_vaddr(&vb->vb2_buf, 0);
- u16 soi = be16_to_cpup((__be16 *)vaddr);
- u16 eoi = be16_to_cpup((__be16 *)(vaddr +
- vb2_get_plane_payload(&vb->vb2_buf, 0) - 2));
+ void *vaddr = vb2_plane_vaddr(vb, 0);
+ u16 soi, eoi;
+ int len, i;
- return soi == SOI_MARKER && eoi == EOI_MARKER;
+ soi = be16_to_cpup((__be16 *)vaddr);
+ if (soi != SOI_MARKER)
+ return false;
+
+ len = vb2_get_plane_payload(vb, 0);
+ vaddr += len - 2;
+ for (i = 0; i < 32; i++) {
+ eoi = be16_to_cpup((__be16 *)(vaddr - i));
+ if (eoi == EOI_MARKER) {
+ if (i > 0)
+ vb2_set_plane_payload(vb, 0, len - i);
+ return true;
+ }
+ }
+
+ return false;
}
/*
