@@ -84,6 +84,8 @@ struct rkvdec_vp9_probs {
struct rkvdec_vp9_inter_frame_probs inter;
struct rkvdec_vp9_intra_only_frame_probs intra_only;
};
+ /* 128 bit alignment */
+ u8 padding1[11];
};
/* Data structure describing auxiliary buffer format. */
@@ -1006,6 +1008,7 @@ static int rkvdec_vp9_start(struct rkvdec_ctx *ctx)
ctx->priv = vp9_ctx;
+ BUILD_BUG_ON(sizeof(priv_tbl->probs) % 16); /* ensure probs size is 128-bit aligned */
priv_tbl = dma_alloc_coherent(rkvdec->dev, sizeof(*priv_tbl),
&vp9_ctx->priv_tbl.dma, GFP_KERNEL);
if (!priv_tbl) {
The addresses of two elements of the segmap[][] member are passed to the hardware which expects 128-bit aligned addresses. However, without this patch offsetof(struct rkvdec_vp9_priv_tbl, segmap[0]) is an odd number (2421) but the hardware just ignores the 5 least significant bits of the address. As a result, the hardware writes the segmentation map to incorrect locations. Inserting 11 bytes of padding corrects this situation by making the said addresses divisible by 16 (i.e. aligned on a 128-bit boundary). Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com> --- drivers/staging/media/rkvdec/rkvdec-vp9.c | 3 +++ 1 file changed, 3 insertions(+)