drivers/media/platform/mtk-jpeg/mtk_jpeg_enc_hw.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2019 MediaTek Inc.
   4  * Author: Xia Jiang <xia.jiang@mediatek.com>
   5  *
   6  */
   7
   8 #include <linux/io.h>
   9 #include <linux/kernel.h>
  10 #include <media/videobuf2-core.h>
  11 #include <media/videobuf2-dma-contig.h>
  12
  13 #include "mtk_jpeg_enc_hw.h"
  14
  15 static const struct mtk_jpeg_enc_qlt mtk_jpeg_enc_quality[] = {
  16         {.quality_param = 34, .hardware_value = JPEG_ENC_QUALITY_Q34},
  17         {.quality_param = 39, .hardware_value = JPEG_ENC_QUALITY_Q39},
  18         {.quality_param = 48, .hardware_value = JPEG_ENC_QUALITY_Q48},
  19         {.quality_param = 60, .hardware_value = JPEG_ENC_QUALITY_Q60},
  20         {.quality_param = 64, .hardware_value = JPEG_ENC_QUALITY_Q64},
  21         {.quality_param = 68, .hardware_value = JPEG_ENC_QUALITY_Q68},
  22         {.quality_param = 74, .hardware_value = JPEG_ENC_QUALITY_Q74},
  23         {.quality_param = 80, .hardware_value = JPEG_ENC_QUALITY_Q80},
  24         {.quality_param = 82, .hardware_value = JPEG_ENC_QUALITY_Q82},
  25         {.quality_param = 84, .hardware_value = JPEG_ENC_QUALITY_Q84},
  26         {.quality_param = 87, .hardware_value = JPEG_ENC_QUALITY_Q87},
  27         {.quality_param = 90, .hardware_value = JPEG_ENC_QUALITY_Q90},
  28         {.quality_param = 92, .hardware_value = JPEG_ENC_QUALITY_Q92},
  29         {.quality_param = 95, .hardware_value = JPEG_ENC_QUALITY_Q95},
  30         {.quality_param = 97, .hardware_value = JPEG_ENC_QUALITY_Q97},
  31 };
  32
  33 void mtk_jpeg_enc_reset(void __iomem *base)
  34 {
  35         writel(0, base + JPEG_ENC_RSTB);
  36         writel(JPEG_ENC_RESET_BIT, base + JPEG_ENC_RSTB);
  37         writel(0, base + JPEG_ENC_CODEC_SEL);
  38 }
  39
  40 u32 mtk_jpeg_enc_get_file_size(void __iomem *base)
  41 {
  42         return readl(base + JPEG_ENC_DMA_ADDR0) -
  43                readl(base + JPEG_ENC_DST_ADDR0);
  44 }
  45
  46 void mtk_jpeg_enc_start(void __iomem *base)
  47 {
  48         u32 value;
  49
  50         value = readl(base + JPEG_ENC_CTRL);
  51         value |= JPEG_ENC_CTRL_INT_EN_BIT | JPEG_ENC_CTRL_ENABLE_BIT;
  52         writel(value, base + JPEG_ENC_CTRL);
  53 }
  54
  55 void mtk_jpeg_set_enc_src(struct mtk_jpeg_ctx *ctx,  void __iomem *base,
  56                           struct vb2_buffer *src_buf)
  57 {
  58         int i;
  59         dma_addr_t dma_addr;
  60
  61         for (i = 0; i < src_buf->num_planes; i++) {
  62                 dma_addr = vb2_dma_contig_plane_dma_addr(src_buf, i) +
  63                            src_buf->planes[i].data_offset;
  64                 if (!i)
  65                         writel(dma_addr, base + JPEG_ENC_SRC_LUMA_ADDR);
  66                 else
  67                         writel(dma_addr, base + JPEG_ENC_SRC_CHROMA_ADDR);
  68         }
  69 }
  70
  71 void mtk_jpeg_set_enc_dst(struct mtk_jpeg_ctx *ctx, void __iomem *base,
  72                           struct vb2_buffer *dst_buf)
  73 {
  74         dma_addr_t dma_addr;
  75         size_t size;
  76         u32 dma_addr_offset;
  77         u32 dma_addr_offsetmask;
  78
  79         dma_addr = vb2_dma_contig_plane_dma_addr(dst_buf, 0);
  80         dma_addr_offset = ctx->enable_exif ? MTK_JPEG_MAX_EXIF_SIZE : 0;
  81         dma_addr_offsetmask = dma_addr & JPEG_ENC_DST_ADDR_OFFSET_MASK;
  82         size = vb2_plane_size(dst_buf, 0);
  83
  84         writel(dma_addr_offset & ~0xf, base + JPEG_ENC_OFFSET_ADDR);
  85         writel(dma_addr_offsetmask & 0xf, base + JPEG_ENC_BYTE_OFFSET_MASK);
  86         writel(dma_addr & ~0xf, base + JPEG_ENC_DST_ADDR0);
  87         writel((dma_addr + size) & ~0xf, base + JPEG_ENC_STALL_ADDR0);
  88 }
  89
  90 void mtk_jpeg_set_enc_params(struct mtk_jpeg_ctx *ctx,  void __iomem *base)
  91 {
  92         u32 value;
  93         u32 width = ctx->out_q.enc_crop_rect.width;
  94         u32 height = ctx->out_q.enc_crop_rect.height;
  95         u32 enc_format = ctx->out_q.fmt->fourcc;
  96         u32 bytesperline = ctx->out_q.pix_mp.plane_fmt[0].bytesperline;
  97         u32 blk_num;
  98         u32 img_stride;
  99         u32 mem_stride;
 100         u32 i, enc_quality;
 101
 102         value = width << 16 | height;
 103         writel(value, base + JPEG_ENC_IMG_SIZE);
 104
 105         if (enc_format == V4L2_PIX_FMT_NV12M ||
 106             enc_format == V4L2_PIX_FMT_NV21M)
 107             /*
 108              * Total 8 x 8 block number of luma and chroma.
 109              * The number of blocks is counted from 0.
 110              */
 111                 blk_num = DIV_ROUND_UP(width, 16) *
 112                           DIV_ROUND_UP(height, 16) * 6 - 1;
 113         else
 114                 blk_num = DIV_ROUND_UP(width, 16) *
 115                           DIV_ROUND_UP(height, 8) * 4 - 1;
 116         writel(blk_num, base + JPEG_ENC_BLK_NUM);
 117
 118         if (enc_format == V4L2_PIX_FMT_NV12M ||
 119             enc_format == V4L2_PIX_FMT_NV21M) {
 120                 /* 4:2:0 */
 121                 img_stride = round_up(width, 16);
 122                 mem_stride = bytesperline;
 123         } else {
 124                 /* 4:2:2 */
 125                 img_stride = round_up(width * 2, 32);
 126                 mem_stride = img_stride;
 127         }
 128         writel(img_stride, base + JPEG_ENC_IMG_STRIDE);
 129         writel(mem_stride, base + JPEG_ENC_STRIDE);
 130
 131         enc_quality = mtk_jpeg_enc_quality[0].hardware_value;
 132         for (i = 0; i < ARRAY_SIZE(mtk_jpeg_enc_quality); i++) {
 133                 if (ctx->enc_quality <= mtk_jpeg_enc_quality[i].quality_param) {
 134                         enc_quality = mtk_jpeg_enc_quality[i].hardware_value;
 135                         break;
 136                 }
 137         }
 138         writel(enc_quality, base + JPEG_ENC_QUALITY);
 139
 140         value = readl(base + JPEG_ENC_CTRL);
 141         value &= ~JPEG_ENC_CTRL_YUV_FORMAT_MASK;
 142         value |= (ctx->out_q.fmt->hw_format & 3) << 3;
 143         if (ctx->enable_exif)
 144                 value |= JPEG_ENC_CTRL_FILE_FORMAT_BIT;
 145         else
 146                 value &= ~JPEG_ENC_CTRL_FILE_FORMAT_BIT;
 147         if (ctx->restart_interval)
 148                 value |= JPEG_ENC_CTRL_RESTART_EN_BIT;
 149         else
 150                 value &= ~JPEG_ENC_CTRL_RESTART_EN_BIT;
 151         writel(value, base + JPEG_ENC_CTRL);
 152
 153         writel(ctx->restart_interval, base + JPEG_ENC_RST_MCU_NUM);
 154 }