[PATCH v10 06/10] media: mediatek: vcodec: Fix vp9 4096x2176 fail for profile2

[Kyrie Wu <kyrie.wu@mediatek.com>]

The DRAM address of the VP9 decoder tile info buffers may require
as much as 36bits for 4096x2176 resolution. Fold the 4 most significant
bits into the lower (padding) four bits of address.

Fixes: 5d418351ca8f1 ("media: mediatek: vcodec: support stateless VP9 decoding")
Signed-off-by: Kyrie Wu <kyrie.wu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
---
 .../mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c b/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c
index d08be051d0ab..b32f5e942501 100644
--- a/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c
+++ b/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c
@@ -1134,9 +1134,17 @@ static int vdec_vp9_slice_setup_tile_buffer(struct vdec_vp9_slice_instance *inst
 					return -EINVAL;
 			}
 			tiles->size[i][j] = size;
+			/*
+			 * If the system supports 64-bit DMA addresses, the upper 4 bits
+			 * of the address are also encoded into the buffer entry.
+			 * The buffer pointer (tb) is incremented after each entry is written.
+			 */
 			if (tiles->mi_rows[i]) {
 				*tb++ = (size << 3) + ((offset << 3) & 0x7f);
-				*tb++ = pa & ~0xf;
+				*tb = pa & GENMASK(31, 4);
+				if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT))
+					*tb |= (pa >> 32) & GENMASK(3, 0);
+				tb++;
 				*tb++ = (pa << 3) & 0x7f;
 				mi_row = (tiles->mi_rows[i] - 1) & 0x1ff;
 				mi_col = (tiles->mi_cols[j] - 1) & 0x3f;
-- 
2.51.0.windows.2