1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Hantro VPU codec driver
4 *
5 * Copyright (C) 2018 Rockchip Electronics Co., Ltd.
6 */
7
8#include "hantro.h"
9
10static const u8 zigzag[64] = {
11	0,   1,  8, 16,  9,  2,  3, 10,
12	17, 24, 32, 25, 18, 11,  4,  5,
13	12, 19, 26, 33, 40, 48, 41, 34,
14	27, 20, 13,  6,  7, 14, 21, 28,
15	35, 42, 49, 56, 57, 50, 43, 36,
16	29, 22, 15, 23, 30, 37, 44, 51,
17	58, 59, 52, 45, 38, 31, 39, 46,
18	53, 60, 61, 54, 47, 55, 62, 63
19};
20
21void hantro_mpeg2_dec_copy_qtable(u8 *qtable,
22				  const struct v4l2_ctrl_mpeg2_quantisation *ctrl)
23{
24	int i, n;
25
26	if (!qtable || !ctrl)
27		return;
28
29	for (i = 0; i < ARRAY_SIZE(zigzag); i++) {
30		n = zigzag[i];
31		qtable[n + 0] = ctrl->intra_quantiser_matrix[i];
32		qtable[n + 64] = ctrl->non_intra_quantiser_matrix[i];
33		qtable[n + 128] = ctrl->chroma_intra_quantiser_matrix[i];
34		qtable[n + 192] = ctrl->chroma_non_intra_quantiser_matrix[i];
35	}
36}
37
38int hantro_mpeg2_dec_init(struct hantro_ctx *ctx)
39{
40	struct hantro_dev *vpu = ctx->dev;
41
42	ctx->mpeg2_dec.qtable.size = ARRAY_SIZE(zigzag) * 4;
43	ctx->mpeg2_dec.qtable.cpu =
44		dma_alloc_coherent(vpu->dev,
45				   ctx->mpeg2_dec.qtable.size,
46				   &ctx->mpeg2_dec.qtable.dma,
47				   GFP_KERNEL);
48	if (!ctx->mpeg2_dec.qtable.cpu)
49		return -ENOMEM;
50	return 0;
51}
52
53void hantro_mpeg2_dec_exit(struct hantro_ctx *ctx)
54{
55	struct hantro_dev *vpu = ctx->dev;
56
57	dma_free_coherent(vpu->dev,
58			  ctx->mpeg2_dec.qtable.size,
59			  ctx->mpeg2_dec.qtable.cpu,
60			  ctx->mpeg2_dec.qtable.dma);
61}
62