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// SPDX-License-Identifier: GPL-2.0
/*
* Hantro VPU codec driver
*
* Copyright (C) 2018 Rockchip Electronics Co., Ltd.
*/
#include "hantro.h"
/*
* probs table with packed
*/
struct vp8_prob_tbl_packed {
u8 prob_mb_skip_false;
u8 prob_intra;
u8 prob_ref_last;
u8 prob_ref_golden;
u8 prob_segment[3];
u8 padding0;
u8 prob_luma_16x16_pred_mode[4];
u8 prob_chroma_pred_mode[3];
u8 padding1;
/* mv prob */
u8 prob_mv_context[2][V4L2_VP8_MV_PROB_CNT];
u8 padding2[2];
/* coeff probs */
u8 prob_coeffs[4][8][3][V4L2_VP8_COEFF_PROB_CNT];
u8 padding3[96];
};
/*
* filter taps taken to 7-bit precision,
* reference RFC6386#Page-16, filters[8][6]
*/
const u32 hantro_vp8_dec_mc_filter[8][6] = {
{ 0, 0, 128, 0, 0, 0 },
{ 0, -6, 123, 12, -1, 0 },
{ 2, -11, 108, 36, -8, 1 },
{ 0, -9, 93, 50, -6, 0 },
{ 3, -16, 77, 77, -16, 3 },
{ 0, -6, 50, 93, -9, 0 },
{ 1, -8, 36, 108, -11, 2 },
{ 0, -1, 12, 123, -6, 0 }
};
void hantro_vp8_prob_update(struct hantro_ctx *ctx,
const struct v4l2_ctrl_vp8_frame *hdr)
{
const struct v4l2_vp8_entropy *entropy = &hdr->entropy;
u32 i, j, k;
u8 *dst;
/* first probs */
dst = ctx->vp8_dec.prob_tbl.cpu;
dst[0] = hdr->prob_skip_false;
dst[1] = hdr->prob_intra;
dst[2] = hdr->prob_last;
dst[3] = hdr->prob_gf;
dst[4] = hdr->segment.segment_probs[0];
dst[5] = hdr->segment.segment_probs[1];
dst[6] = hdr->segment.segment_probs[2];
dst[7] = 0;
dst += 8;
dst[0] = entropy->y_mode_probs[0];
dst[1] = entropy->y_mode_probs[1];
dst[2] = entropy->y_mode_probs[2];
dst[3] = entropy->y_mode_probs[3];
dst[4] = entropy->uv_mode_probs[0];
dst[5] = entropy->uv_mode_probs[1];
dst[6] = entropy->uv_mode_probs[2];
dst[7] = 0; /*unused */
/* mv probs */
dst += 8;
dst[0] = entropy->mv_probs[0][0]; /* is short */
dst[1] = entropy->mv_probs[1][0];
dst[2] = entropy->mv_probs[0][1]; /* sign */
dst[3] = entropy->mv_probs[1][1];
dst[4] = entropy->mv_probs[0][8 + 9];
dst[5] = entropy->mv_probs[0][9 + 9];
dst[6] = entropy->mv_probs[1][8 + 9];
dst[7] = entropy->mv_probs[1][9 + 9];
dst += 8;
for (i = 0; i < 2; ++i) {
for (j = 0; j < 8; j += 4) {
dst[0] = entropy->mv_probs[i][j + 9 + 0];
dst[1] = entropy->mv_probs[i][j + 9 + 1];
dst[2] = entropy->mv_probs[i][j + 9 + 2];
dst[3] = entropy->mv_probs[i][j + 9 + 3];
dst += 4;
}
}
for (i = 0; i < 2; ++i) {
dst[0] = entropy->mv_probs[i][0 + 2];
dst[1] = entropy->mv_probs[i][1 + 2];
dst[2] = entropy->mv_probs[i][2 + 2];
dst[3] = entropy->mv_probs[i][3 + 2];
dst[4] = entropy->mv_probs[i][4 + 2];
dst[5] = entropy->mv_probs[i][5 + 2];
dst[6] = entropy->mv_probs[i][6 + 2];
dst[7] = 0; /*unused */
dst += 8;
}
/* coeff probs (header part) */
dst = ctx->vp8_dec.prob_tbl.cpu;
dst += (8 * 7);
for (i = 0; i < 4; ++i) {
for (j = 0; j < 8; ++j) {
for (k = 0; k < 3; ++k) {
dst[0] = entropy->coeff_probs[i][j][k][0];
dst[1] = entropy->coeff_probs[i][j][k][1];
dst[2] = entropy->coeff_probs[i][j][k][2];
dst[3] = entropy->coeff_probs[i][j][k][3];
dst += 4;
}
}
}
/* coeff probs (footer part) */
dst = ctx->vp8_dec.prob_tbl.cpu;
dst += (8 * 55);
for (i = 0; i < 4; ++i) {
for (j = 0; j < 8; ++j) {
for (k = 0; k < 3; ++k) {
dst[0] = entropy->coeff_probs[i][j][k][4];
dst[1] = entropy->coeff_probs[i][j][k][5];
dst[2] = entropy->coeff_probs[i][j][k][6];
dst[3] = entropy->coeff_probs[i][j][k][7];
dst[4] = entropy->coeff_probs[i][j][k][8];
dst[5] = entropy->coeff_probs[i][j][k][9];
dst[6] = entropy->coeff_probs[i][j][k][10];
dst[7] = 0; /*unused */
dst += 8;
}
}
}
}
int hantro_vp8_dec_init(struct hantro_ctx *ctx)
{
struct hantro_dev *vpu = ctx->dev;
struct hantro_aux_buf *aux_buf;
unsigned int mb_width, mb_height;
size_t segment_map_size;
int ret;
/* segment map table size calculation */
mb_width = DIV_ROUND_UP(ctx->dst_fmt.width, 16);
mb_height = DIV_ROUND_UP(ctx->dst_fmt.height, 16);
segment_map_size = round_up(DIV_ROUND_UP(mb_width * mb_height, 4), 64);
/*
* In context init the dma buffer for segment map must be allocated.
* And the data in segment map buffer must be set to all zero.
*/
aux_buf = &ctx->vp8_dec.segment_map;
aux_buf->size = segment_map_size;
aux_buf->cpu = dma_alloc_coherent(vpu->dev, aux_buf->size,
&aux_buf->dma, GFP_KERNEL);
if (!aux_buf->cpu)
return -ENOMEM;
/*
* Allocate probability table buffer,
* total 1208 bytes, 4K page is far enough.
*/
aux_buf = &ctx->vp8_dec.prob_tbl;
aux_buf->size = sizeof(struct vp8_prob_tbl_packed);
aux_buf->cpu = dma_alloc_coherent(vpu->dev, aux_buf->size,
&aux_buf->dma, GFP_KERNEL);
if (!aux_buf->cpu) {
ret = -ENOMEM;
goto err_free_seg_map;
}
return 0;
err_free_seg_map:
dma_free_coherent(vpu->dev, ctx->vp8_dec.segment_map.size,
ctx->vp8_dec.segment_map.cpu,
ctx->vp8_dec.segment_map.dma);
return ret;
}
void hantro_vp8_dec_exit(struct hantro_ctx *ctx)
{
struct hantro_vp8_dec_hw_ctx *vp8_dec = &ctx->vp8_dec;
struct hantro_dev *vpu = ctx->dev;
dma_free_coherent(vpu->dev, vp8_dec->segment_map.size,
vp8_dec->segment_map.cpu, vp8_dec->segment_map.dma);
dma_free_coherent(vpu->dev, vp8_dec->prob_tbl.size,
vp8_dec->prob_tbl.cpu, vp8_dec->prob_tbl.dma);
}
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