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(dev: vpu->dev,
45 size: ctx->mpeg2_dec.qtable.size,
46 dma_handle: &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(dev: vpu->dev,
58 size: ctx->mpeg2_dec.qtable.size,
59 cpu_addr: ctx->mpeg2_dec.qtable.cpu,
60 dma_handle: ctx->mpeg2_dec.qtable.dma);
61}
62

source code of linux/drivers/media/platform/verisilicon/hantro_mpeg2.c