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
10/*
11 * probs table with packed
12 */
13struct vp8_prob_tbl_packed {
14 u8 prob_mb_skip_false;
15 u8 prob_intra;
16 u8 prob_ref_last;
17 u8 prob_ref_golden;
18 u8 prob_segment[3];
19 u8 padding0;
20
21 u8 prob_luma_16x16_pred_mode[4];
22 u8 prob_chroma_pred_mode[3];
23 u8 padding1;
24
25 /* mv prob */
26 u8 prob_mv_context[2][V4L2_VP8_MV_PROB_CNT];
27 u8 padding2[2];
28
29 /* coeff probs */
30 u8 prob_coeffs[4][8][3][V4L2_VP8_COEFF_PROB_CNT];
31 u8 padding3[96];
32};
33
34/*
35 * filter taps taken to 7-bit precision,
36 * reference RFC6386#Page-16, filters[8][6]
37 */
38const u32 hantro_vp8_dec_mc_filter[8][6] = {
39 { 0, 0, 128, 0, 0, 0 },
40 { 0, -6, 123, 12, -1, 0 },
41 { 2, -11, 108, 36, -8, 1 },
42 { 0, -9, 93, 50, -6, 0 },
43 { 3, -16, 77, 77, -16, 3 },
44 { 0, -6, 50, 93, -9, 0 },
45 { 1, -8, 36, 108, -11, 2 },
46 { 0, -1, 12, 123, -6, 0 }
47};
48
49void hantro_vp8_prob_update(struct hantro_ctx *ctx,
50 const struct v4l2_ctrl_vp8_frame *hdr)
51{
52 const struct v4l2_vp8_entropy *entropy = &hdr->entropy;
53 u32 i, j, k;
54 u8 *dst;
55
56 /* first probs */
57 dst = ctx->vp8_dec.prob_tbl.cpu;
58
59 dst[0] = hdr->prob_skip_false;
60 dst[1] = hdr->prob_intra;
61 dst[2] = hdr->prob_last;
62 dst[3] = hdr->prob_gf;
63 dst[4] = hdr->segment.segment_probs[0];
64 dst[5] = hdr->segment.segment_probs[1];
65 dst[6] = hdr->segment.segment_probs[2];
66 dst[7] = 0;
67
68 dst += 8;
69 dst[0] = entropy->y_mode_probs[0];
70 dst[1] = entropy->y_mode_probs[1];
71 dst[2] = entropy->y_mode_probs[2];
72 dst[3] = entropy->y_mode_probs[3];
73 dst[4] = entropy->uv_mode_probs[0];
74 dst[5] = entropy->uv_mode_probs[1];
75 dst[6] = entropy->uv_mode_probs[2];
76 dst[7] = 0; /*unused */
77
78 /* mv probs */
79 dst += 8;
80 dst[0] = entropy->mv_probs[0][0]; /* is short */
81 dst[1] = entropy->mv_probs[1][0];
82 dst[2] = entropy->mv_probs[0][1]; /* sign */
83 dst[3] = entropy->mv_probs[1][1];
84 dst[4] = entropy->mv_probs[0][8 + 9];
85 dst[5] = entropy->mv_probs[0][9 + 9];
86 dst[6] = entropy->mv_probs[1][8 + 9];
87 dst[7] = entropy->mv_probs[1][9 + 9];
88 dst += 8;
89 for (i = 0; i < 2; ++i) {
90 for (j = 0; j < 8; j += 4) {
91 dst[0] = entropy->mv_probs[i][j + 9 + 0];
92 dst[1] = entropy->mv_probs[i][j + 9 + 1];
93 dst[2] = entropy->mv_probs[i][j + 9 + 2];
94 dst[3] = entropy->mv_probs[i][j + 9 + 3];
95 dst += 4;
96 }
97 }
98 for (i = 0; i < 2; ++i) {
99 dst[0] = entropy->mv_probs[i][0 + 2];
100 dst[1] = entropy->mv_probs[i][1 + 2];
101 dst[2] = entropy->mv_probs[i][2 + 2];
102 dst[3] = entropy->mv_probs[i][3 + 2];
103 dst[4] = entropy->mv_probs[i][4 + 2];
104 dst[5] = entropy->mv_probs[i][5 + 2];
105 dst[6] = entropy->mv_probs[i][6 + 2];
106 dst[7] = 0; /*unused */
107 dst += 8;
108 }
109
110 /* coeff probs (header part) */
111 dst = ctx->vp8_dec.prob_tbl.cpu;
112 dst += (8 * 7);
113 for (i = 0; i < 4; ++i) {
114 for (j = 0; j < 8; ++j) {
115 for (k = 0; k < 3; ++k) {
116 dst[0] = entropy->coeff_probs[i][j][k][0];
117 dst[1] = entropy->coeff_probs[i][j][k][1];
118 dst[2] = entropy->coeff_probs[i][j][k][2];
119 dst[3] = entropy->coeff_probs[i][j][k][3];
120 dst += 4;
121 }
122 }
123 }
124
125 /* coeff probs (footer part) */
126 dst = ctx->vp8_dec.prob_tbl.cpu;
127 dst += (8 * 55);
128 for (i = 0; i < 4; ++i) {
129 for (j = 0; j < 8; ++j) {
130 for (k = 0; k < 3; ++k) {
131 dst[0] = entropy->coeff_probs[i][j][k][4];
132 dst[1] = entropy->coeff_probs[i][j][k][5];
133 dst[2] = entropy->coeff_probs[i][j][k][6];
134 dst[3] = entropy->coeff_probs[i][j][k][7];
135 dst[4] = entropy->coeff_probs[i][j][k][8];
136 dst[5] = entropy->coeff_probs[i][j][k][9];
137 dst[6] = entropy->coeff_probs[i][j][k][10];
138 dst[7] = 0; /*unused */
139 dst += 8;
140 }
141 }
142 }
143}
144
145int hantro_vp8_dec_init(struct hantro_ctx *ctx)
146{
147 struct hantro_dev *vpu = ctx->dev;
148 struct hantro_aux_buf *aux_buf;
149 unsigned int mb_width, mb_height;
150 size_t segment_map_size;
151 int ret;
152
153 /* segment map table size calculation */
154 mb_width = DIV_ROUND_UP(ctx->dst_fmt.width, 16);
155 mb_height = DIV_ROUND_UP(ctx->dst_fmt.height, 16);
156 segment_map_size = round_up(DIV_ROUND_UP(mb_width * mb_height, 4), 64);
157
158 /*
159 * In context init the dma buffer for segment map must be allocated.
160 * And the data in segment map buffer must be set to all zero.
161 */
162 aux_buf = &ctx->vp8_dec.segment_map;
163 aux_buf->size = segment_map_size;
164 aux_buf->cpu = dma_alloc_coherent(dev: vpu->dev, size: aux_buf->size,
165 dma_handle: &aux_buf->dma, GFP_KERNEL);
166 if (!aux_buf->cpu)
167 return -ENOMEM;
168
169 /*
170 * Allocate probability table buffer,
171 * total 1208 bytes, 4K page is far enough.
172 */
173 aux_buf = &ctx->vp8_dec.prob_tbl;
174 aux_buf->size = sizeof(struct vp8_prob_tbl_packed);
175 aux_buf->cpu = dma_alloc_coherent(dev: vpu->dev, size: aux_buf->size,
176 dma_handle: &aux_buf->dma, GFP_KERNEL);
177 if (!aux_buf->cpu) {
178 ret = -ENOMEM;
179 goto err_free_seg_map;
180 }
181
182 return 0;
183
184err_free_seg_map:
185 dma_free_coherent(dev: vpu->dev, size: ctx->vp8_dec.segment_map.size,
186 cpu_addr: ctx->vp8_dec.segment_map.cpu,
187 dma_handle: ctx->vp8_dec.segment_map.dma);
188
189 return ret;
190}
191
192void hantro_vp8_dec_exit(struct hantro_ctx *ctx)
193{
194 struct hantro_vp8_dec_hw_ctx *vp8_dec = &ctx->vp8_dec;
195 struct hantro_dev *vpu = ctx->dev;
196
197 dma_free_coherent(dev: vpu->dev, size: vp8_dec->segment_map.size,
198 cpu_addr: vp8_dec->segment_map.cpu, dma_handle: vp8_dec->segment_map.dma);
199 dma_free_coherent(dev: vpu->dev, size: vp8_dec->prob_tbl.size,
200 cpu_addr: vp8_dec->prob_tbl.cpu, dma_handle: vp8_dec->prob_tbl.dma);
201}
202

source code of linux/drivers/media/platform/verisilicon/hantro_vp8.c