On Wed, Nov 13, 2019 at 7:06 AM Philipp Zabel <p.zabel@xxxxxxxxxxxxxx> wrote:
>
> This patch adds JPEG decoding support for CODA960, handling the JPEG
> hardware directly. A separate JPEG decoder video device is created due
> to the separate hardware unit and different supported pixel formats.
> While the hardware can not change subsampling on the fly, it can decode
> 4:2:2 subsampled JPEG images into YUV422P.
>
> Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
> [m.felsch@xxxxxxxxxxxxxx: fix qsequence counting by explicitly
> checking for the !use_bit case]
> Signed-off-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx>
> ---
> drivers/media/platform/Kconfig | 1 +
> drivers/media/platform/coda/coda-common.c | 124 ++++-
> drivers/media/platform/coda/coda-jpeg.c | 551 ++++++++++++++++++++++
> drivers/media/platform/coda/coda.h | 11 +-
> 4 files changed, 683 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
> index e84f35d3a68e..c989a2a45c60 100644
> --- a/drivers/media/platform/Kconfig
> +++ b/drivers/media/platform/Kconfig
> @@ -180,6 +180,7 @@ config VIDEO_CODA
> select SRAM
> select VIDEOBUF2_DMA_CONTIG
> select VIDEOBUF2_VMALLOC
> + select V4L2_JPEG_HELPER
> select V4L2_MEM2MEM_DEV
> select GENERIC_ALLOCATOR
> help
> diff --git a/drivers/media/platform/coda/coda-common.c b/drivers/media/platform/coda/coda-common.c
> index 9aa5aa837c4e..d8f988b207b1 100644
> --- a/drivers/media/platform/coda/coda-common.c
> +++ b/drivers/media/platform/coda/coda-common.c
> @@ -159,6 +159,7 @@ static const struct coda_codec coda9_codecs[] = {
> CODA_CODEC(CODA9_MODE_DECODE_H264, V4L2_PIX_FMT_H264, V4L2_PIX_FMT_YUV420, 1920, 1088),
> CODA_CODEC(CODA9_MODE_DECODE_MP2, V4L2_PIX_FMT_MPEG2, V4L2_PIX_FMT_YUV420, 1920, 1088),
> CODA_CODEC(CODA9_MODE_DECODE_MP4, V4L2_PIX_FMT_MPEG4, V4L2_PIX_FMT_YUV420, 1920, 1088),
> + CODA_CODEC(CODA9_MODE_DECODE_MJPG, V4L2_PIX_FMT_JPEG, V4L2_PIX_FMT_YUV420, 8192, 8192),
> };
>
> struct coda_video_device {
> @@ -252,6 +253,22 @@ static const struct coda_video_device coda9_jpeg_encoder = {
> },
> };
>
> +static const struct coda_video_device coda9_jpeg_decoder = {
> + .name = "coda-jpeg-decoder",
> + .type = CODA_INST_DECODER,
> + .ops = &coda9_jpeg_decode_ops,
> + .direct = true,
> + .src_formats = {
> + V4L2_PIX_FMT_JPEG,
> + },
> + .dst_formats = {
> + V4L2_PIX_FMT_NV12,
> + V4L2_PIX_FMT_YUV420,
> + V4L2_PIX_FMT_YVU420,
> + V4L2_PIX_FMT_YUV422P,
> + },
> +};
> +
> static const struct coda_video_device *codadx6_video_devices[] = {
> &coda_bit_encoder,
> };
> @@ -270,6 +287,7 @@ static const struct coda_video_device *coda7_video_devices[] = {
>
> static const struct coda_video_device *coda9_video_devices[] = {
> &coda9_jpeg_encoder,
> + &coda9_jpeg_decoder,
> &coda_bit_encoder,
> &coda_bit_decoder,
> };
> @@ -411,6 +429,12 @@ static int coda_querycap(struct file *file, void *priv,
> return 0;
> }
>
> +static const u32 coda_formats_420[CODA_MAX_FORMATS] = {
> + V4L2_PIX_FMT_NV12,
> + V4L2_PIX_FMT_YUV420,
> + V4L2_PIX_FMT_YVU420,
> +};
> +
> static int coda_enum_fmt(struct file *file, void *priv,
> struct v4l2_fmtdesc *f)
> {
> @@ -421,10 +445,31 @@ static int coda_enum_fmt(struct file *file, void *priv,
>
> if (f->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
> formats = cvd->src_formats;
> - else if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
> + else if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
> + struct coda_q_data *q_data_src;
> + struct vb2_queue *src_vq;
> +
> formats = cvd->dst_formats;
> - else
> +
> + /*
> + * If the source format is already fixed, only allow the same
> + * chroma subsampling.
> + */
> + q_data_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
> + src_vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx,
> + V4L2_BUF_TYPE_VIDEO_OUTPUT);
> + if (q_data_src->fourcc == V4L2_PIX_FMT_JPEG &&
> + vb2_is_streaming(src_vq)) {
> + if (ctx->params.jpeg_format == 0) {
> + formats = coda_formats_420;
> + } else if (ctx->params.jpeg_format == 1) {
> + f->pixelformat = V4L2_PIX_FMT_YUV422P;
> + return f->index ? -EINVAL : 0;
> + }
> + }
> + } else {
> return -EINVAL;
> + }
>
> if (f->index >= CODA_MAX_FORMATS || formats[f->index] == 0)
> return -EINVAL;
> @@ -614,12 +659,21 @@ static int coda_try_fmt_vid_cap(struct file *file, void *priv,
>
> /*
> * If the source format is already fixed, only allow the same output
> - * resolution
> + * resolution. When decoding JPEG images, we also have to make sure to
> + * use the same chroma subsampling.
> */
> src_vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
> if (vb2_is_streaming(src_vq)) {
> f->fmt.pix.width = q_data_src->width;
> f->fmt.pix.height = q_data_src->height;
> +
> + if (q_data_src->fourcc == V4L2_PIX_FMT_JPEG) {
> + if (ctx->params.jpeg_format == 0 &&
> + f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV422P)
> + f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
> + else if (ctx->params.jpeg_format == 1)
> + f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
> + }
> }
>
> f->fmt.pix.colorspace = ctx->colorspace;
> @@ -747,6 +801,7 @@ static int coda_s_fmt(struct coda_ctx *ctx, struct v4l2_format *f,
> /* else fall through */
> case V4L2_PIX_FMT_YUV420:
> case V4L2_PIX_FMT_YVU420:
> + case V4L2_PIX_FMT_YUV422P:
> ctx->tiled_map_type = GDI_LINEAR_FRAME_MAP;
> break;
> default:
> @@ -1894,6 +1949,45 @@ static int coda_start_streaming(struct vb2_queue *q, unsigned int count)
> }
> }
>
> + /*
> + * Check the first input JPEG buffer to determine chroma
> + * subsampling.
> + */
> + if (q_data_src->fourcc == V4L2_PIX_FMT_JPEG) {
> + buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
> + ret = coda_jpeg_decode_header(ctx, &buf->vb2_buf);
> + if (ret < 0) {
> + v4l2_err(v4l2_dev,
> + "failed to decode JPEG header: %d\n",
> + ret);
> + goto err;
> + }
> +
> + q_data_dst = get_q_data(ctx,
> + V4L2_BUF_TYPE_VIDEO_CAPTURE);
> + q_data_dst->width = round_up(q_data_src->width, 16);
> + q_data_dst->bytesperline = q_data_dst->width;
> + if (ctx->params.jpeg_format == 0) {
> + q_data_dst->height =
> + round_up(q_data_src->height, 16);
> + q_data_dst->sizeimage =
> + q_data_dst->bytesperline *
> + q_data_dst->height * 3 / 2;
> + if (q_data_dst->fourcc != V4L2_PIX_FMT_YUV420)
> + q_data_dst->fourcc = V4L2_PIX_FMT_NV12;
> + } else {
> + q_data_dst->height =
> + round_up(q_data_src->height, 8);
> + q_data_dst->sizeimage =
> + q_data_dst->bytesperline *
> + q_data_dst->height * 2;
> + q_data_dst->fourcc = V4L2_PIX_FMT_YUV422P;
> + }
> + q_data_dst->rect.left = 0;
> + q_data_dst->rect.top = 0;
> + q_data_dst->rect.width = q_data_src->width;
> + q_data_dst->rect.height = q_data_src->height;
> + }
> ctx->streamon_out = 1;
> } else {
> ctx->streamon_cap = 1;
> @@ -2132,6 +2226,30 @@ static int coda_s_ctrl(struct v4l2_ctrl *ctrl)
> case V4L2_CID_JPEG_RESTART_INTERVAL:
> ctx->params.jpeg_restart_interval = ctrl->val;
> break;
> + case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
> + switch (ctrl->val) {
> + case V4L2_JPEG_CHROMA_SUBSAMPLING_444:
> + ctx->params.jpeg_chroma_subsampling[0] = 0x11;
> + ctx->params.jpeg_chroma_subsampling[1] = 0x11;
> + ctx->params.jpeg_chroma_subsampling[2] = 0x11;
> + break;
> + case V4L2_JPEG_CHROMA_SUBSAMPLING_422:
> + ctx->params.jpeg_chroma_subsampling[0] = 0x21;
> + ctx->params.jpeg_chroma_subsampling[1] = 0x11;
> + ctx->params.jpeg_chroma_subsampling[2] = 0x11;
> + break;
> + case V4L2_JPEG_CHROMA_SUBSAMPLING_420:
> + ctx->params.jpeg_chroma_subsampling[0] = 0x22;
> + ctx->params.jpeg_chroma_subsampling[1] = 0x11;
> + ctx->params.jpeg_chroma_subsampling[2] = 0x11;
> + break;
> + case V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY:
> + ctx->params.jpeg_chroma_subsampling[0] = 0x21;
> + ctx->params.jpeg_chroma_subsampling[1] = 0x00;
> + ctx->params.jpeg_chroma_subsampling[2] = 0x00;
> + break;
> + }
> + break;
> case V4L2_CID_MPEG_VIDEO_VBV_DELAY:
> ctx->params.vbv_delay = ctrl->val;
> break;
> diff --git a/drivers/media/platform/coda/coda-jpeg.c b/drivers/media/platform/coda/coda-jpeg.c
> index c5cfa985c829..3a6aa027c82b 100644
> --- a/drivers/media/platform/coda/coda-jpeg.c
> +++ b/drivers/media/platform/coda/coda-jpeg.c
> @@ -15,6 +15,7 @@
>
> #include <media/v4l2-common.h>
> #include <media/v4l2-fh.h>
> +#include <media/v4l2-jpeg.h>
> #include <media/v4l2-mem2mem.h>
> #include <media/videobuf2-core.h>
> #include <media/videobuf2-dma-contig.h>
> @@ -37,6 +38,18 @@ enum {
> CODA9_JPEG_FORMAT_400,
> };
>
> +struct coda_huff_tab {
> + u8 dc_bits[2][16];
> + u8 dc_values[2][12 + 4]; /* padded to 32-bit */
> + u8 ac_bits[2][16];
> + u8 ac_values[2][162 + 2]; /* padded to 32-bit */
> +
> + /* DC Luma, DC Chroma, AC Luma, AC Chroma */
> + s16 min[4 * 16];
> + s16 max[4 * 16];
> + s8 ptr[4 * 16];
> +};
> +
> /*
> * Typical Huffman tables for 8-bit precision luminance and
> * chrominance from JPEG ITU-T.81 (ISO/IEC 10918-1) Annex K.3
> @@ -245,6 +258,273 @@ bool coda_jpeg_check_buffer(struct coda_ctx *ctx, struct vb2_buffer *vb)
> return false;
> }
>
> +static int coda9_jpeg_gen_dec_huff_tab(struct coda_ctx *ctx, int tab_num);
> +
> +int coda_jpeg_decode_header(struct coda_ctx *ctx, struct vb2_buffer *vb)
> +{
> + struct coda_dev *dev = ctx->dev;
> + u8 *buf = vb2_plane_vaddr(vb, 0);
> + size_t len = vb2_get_plane_payload(vb, 0);
> + struct v4l2_jpeg_scan_header scan_header;
> + struct v4l2_jpeg_reference quantization_tables[4] = { 0 };
> + struct v4l2_jpeg_reference huffman_tables[4] = { 0 };
> + struct v4l2_jpeg_header header = {
> + .scan = &scan_header,
> + .quantization_tables = quantization_tables,
> + .huffman_tables = huffman_tables,
> + };
> + struct coda_q_data *q_data_src;
> + struct coda_huff_tab *huff_tab;
> + int i, j, ret;
> +
> + ret = v4l2_jpeg_parse_header(buf, len, &header);
> + if (ret < 0) {
> + v4l2_err(&dev->v4l2_dev, "failed to parse header\n");
> + return ret;
> + }
> +
> + ctx->params.jpeg_restart_interval = header.restart_interval;
> +
> + /* check frame header */
> + if (header.frame.height > ctx->codec->max_h ||
> + header.frame.width > ctx->codec->max_w) {
> + v4l2_err(&dev->v4l2_dev, "invalid dimensions: %dx%d\n",
> + header.frame.width, header.frame.height);
> + return -EINVAL;
> + }
> +
> + q_data_src = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT);
> + if (header.frame.height != q_data_src->height ||
> + header.frame.width != q_data_src->width) {
> + v4l2_err(&dev->v4l2_dev,
> + "dimensions don't match format: %dx%d\n",
> + header.frame.width, header.frame.height);
> + return -EINVAL;
> + }
> +
> + /* install quantization tables */
> + if (quantization_tables[3].start) {
> + v4l2_err(&dev->v4l2_dev,
> + "only 3 quantization tables supported\n");
> + return -EINVAL;
> + }
> + for (i = 0; i < 3; i++) {
> + if (!quantization_tables[i].start)
> + continue;
> + if (!ctx->params.jpeg_qmat_tab[i])
> + ctx->params.jpeg_qmat_tab[i] = kmalloc(64, GFP_KERNEL);
> + memcpy(ctx->params.jpeg_qmat_tab[i],
> + quantization_tables[i].start, 64);
> + }
> +
> + /* install Huffman tables */
> + for (i = 0; i < 4; i++) {
> + if (!huffman_tables[i].start) {
> + v4l2_err(&dev->v4l2_dev, "missing Huffman table\n");
> + return -EINVAL;
> + }
> + if (huffman_tables[i].length != ((i & 2) ? 178 : 28)) {
> + v4l2_err(&dev->v4l2_dev,
> + "invalid Huffman table %d length: %zu\n", i,
> + huffman_tables[i].length);
> + return -EINVAL;
> + }
> + }
> + huff_tab = ctx->params.jpeg_huff_tab;
> + if (!huff_tab) {
> + huff_tab = kzalloc(sizeof(*huff_tab), GFP_KERNEL);
> + if (!huff_tab)
> + return -ENOMEM;
> + ctx->params.jpeg_huff_tab = huff_tab;
> + }
> + memcpy(huff_tab->dc_bits[0], huffman_tables[0].start, 16);
> + memcpy(huff_tab->dc_values[0], huffman_tables[0].start + 16, 12);
> + memcpy(huff_tab->dc_bits[1], huffman_tables[1].start, 16);
> + memcpy(huff_tab->dc_values[1], huffman_tables[1].start + 16, 12);
> + memcpy(huff_tab->ac_bits[0], huffman_tables[2].start, 16);
> + memcpy(huff_tab->ac_values[0], huffman_tables[2].start + 16, 162);
> + memcpy(huff_tab->ac_bits[1], huffman_tables[3].start, 16);
> + memcpy(huff_tab->ac_values[1], huffman_tables[3].start + 16, 162);
> +
> + /* check scan header */
> + for (i = 0; i < scan_header.num_components; i++) {
> + struct v4l2_jpeg_scan_component_spec *scan_component;
> +
> + scan_component = &scan_header.component[i];
> + for (j = 0; j < header.frame.num_components; j++) {
> + if (header.frame.component[j].component_identifier ==
> + scan_component->component_selector)
> + break;
> + }
> + if (j == header.frame.num_components)
> + continue;
> +
> + ctx->params.jpeg_huff_dc_index[j] =
> + scan_component->dc_entropy_coding_table_selector;
> + ctx->params.jpeg_huff_ac_index[j] =
> + scan_component->ac_entropy_coding_table_selector;
> + }
> +
> + /* Generate Huffman table information */
> + for (i = 0; i < 4; i++)
> + coda9_jpeg_gen_dec_huff_tab(ctx, i);
> +
> + /* start of entropy coded segment */
> + ctx->jpeg_ecs_offset = header.ecs_offset;
> +
> + if (header.frame.subsampling == V4L2_JPEG_CHROMA_SUBSAMPLING_422)
> + ctx->params.jpeg_format = 1;
> +
> + return 0;
> +}
> +
> +static inline void coda9_jpeg_write_huff_values(struct coda_dev *dev, u8 *bits,
> + s8 *values, int num_values)
> +{
> + int huff_length, i;
> +
> + for (huff_length = 0, i = 0; i < 16; i++)
> + huff_length += bits[i];
> + for (i = huff_length; i < num_values; i++)
> + values[i] = -1;
> + for (i = 0; i < num_values; i++)
> + coda_write(dev, (s32)values[i], CODA9_REG_JPEG_HUFF_DATA);
> +}
> +
> +static int coda9_jpeg_dec_huff_setup(struct coda_ctx *ctx)
> +{
> + struct coda_huff_tab *huff_tab = ctx->params.jpeg_huff_tab;
> + struct coda_dev *dev = ctx->dev;
> + s16 *huff_min = huff_tab->min;
> + s16 *huff_max = huff_tab->max;
> + s8 *huff_ptr = huff_tab->ptr;
> + int i;
> +
> + /* MIN Tables */
> + coda_write(dev, 0x003, CODA9_REG_JPEG_HUFF_CTRL);
> + coda_write(dev, 0x000, CODA9_REG_JPEG_HUFF_ADDR);
> + for (i = 0; i < 4 * 16; i++)
> + coda_write(dev, (s32)huff_min[i], CODA9_REG_JPEG_HUFF_DATA);
> +
> + /* MAX Tables */
> + coda_write(dev, 0x403, CODA9_REG_JPEG_HUFF_CTRL);
> + coda_write(dev, 0x440, CODA9_REG_JPEG_HUFF_ADDR);
> + for (i = 0; i < 4 * 16; i++)
> + coda_write(dev, (s32)huff_max[i], CODA9_REG_JPEG_HUFF_DATA);
> +
> + /* PTR Tables */
> + coda_write(dev, 0x803, CODA9_REG_JPEG_HUFF_CTRL);
> + coda_write(dev, 0x880, CODA9_REG_JPEG_HUFF_ADDR);
> + for (i = 0; i < 4 * 16; i++)
> + coda_write(dev, (s32)huff_ptr[i], CODA9_REG_JPEG_HUFF_DATA);
> +
> + /* VAL Tables: DC Luma, DC Chroma, AC Luma, AC Chroma */
> + coda_write(dev, 0xc03, CODA9_REG_JPEG_HUFF_CTRL);
> + coda9_jpeg_write_huff_values(dev, huff_tab->dc_bits[0],
> + huff_tab->dc_values[0], 12);
> + coda9_jpeg_write_huff_values(dev, huff_tab->dc_bits[1],
> + huff_tab->dc_values[1], 12);
> + coda9_jpeg_write_huff_values(dev, huff_tab->ac_bits[0],
> + huff_tab->ac_values[0], 162);
> + coda9_jpeg_write_huff_values(dev, huff_tab->ac_bits[1],
> + huff_tab->ac_values[1], 162);
> + coda_write(dev, 0x000, CODA9_REG_JPEG_HUFF_CTRL);
> + return 0;
> +}
> +
> +static inline void coda9_jpeg_write_qmat_tab(struct coda_dev *dev,
> + u8 *qmat, int index)
> +{
> + int i;
> +
> + coda_write(dev, index | 0x3, CODA9_REG_JPEG_QMAT_CTRL);
> + for (i = 0; i < 64; i++)
> + coda_write(dev, qmat[i], CODA9_REG_JPEG_QMAT_DATA);
> + coda_write(dev, 0, CODA9_REG_JPEG_QMAT_CTRL);
> +}
> +
> +static void coda9_jpeg_qmat_setup(struct coda_ctx *ctx)
> +{
> + struct coda_dev *dev = ctx->dev;
> + int *qmat_index = ctx->params.jpeg_qmat_index;
> + u8 **qmat_tab = ctx->params.jpeg_qmat_tab;
> +
> + coda9_jpeg_write_qmat_tab(dev, qmat_tab[qmat_index[0]], 0x00);
> + coda9_jpeg_write_qmat_tab(dev, qmat_tab[qmat_index[1]], 0x40);
> + coda9_jpeg_write_qmat_tab(dev, qmat_tab[qmat_index[2]], 0x80);
> +}
> +
> +static void coda9_jpeg_dec_bbc_gbu_setup(struct coda_ctx *ctx,
> + struct vb2_buffer *buf, u32 ecs_offset)
> +{
> + struct coda_dev *dev = ctx->dev;
> + int page_ptr, word_ptr, bit_ptr;
> + u32 bbc_base_addr, end_addr;
> + int bbc_cur_pos;
> + int ret, val;
> +
> + bbc_base_addr = vb2_dma_contig_plane_dma_addr(buf, 0);
> + end_addr = bbc_base_addr + vb2_get_plane_payload(buf, 0);
> +
> + page_ptr = ecs_offset / 256;
> + word_ptr = (ecs_offset % 256) / 4;
> + if (page_ptr & 1)
> + word_ptr += 64;
> + bit_ptr = (ecs_offset % 4) * 8;
> + if (word_ptr & 1)
> + bit_ptr += 32;
> + word_ptr &= ~0x1;
> +
> + coda_write(dev, end_addr, CODA9_REG_JPEG_BBC_WR_PTR);
> + coda_write(dev, bbc_base_addr, CODA9_REG_JPEG_BBC_BAS_ADDR);
> +
> + /* Leave 3 256-byte page margin to avoid a BBC interrupt */
> + coda_write(dev, end_addr + 256 * 3 + 256, CODA9_REG_JPEG_BBC_END_ADDR);
> + val = DIV_ROUND_UP(vb2_plane_size(buf, 0), 256) + 3;
> + coda_write(dev, BIT(31) | val, CODA9_REG_JPEG_BBC_STRM_CTRL);
> +
> + bbc_cur_pos = page_ptr;
> + coda_write(dev, bbc_cur_pos, CODA9_REG_JPEG_BBC_CUR_POS);
> + coda_write(dev, bbc_base_addr + (bbc_cur_pos << 8),
> + CODA9_REG_JPEG_BBC_EXT_ADDR);
> + coda_write(dev, (bbc_cur_pos & 1) << 6, CODA9_REG_JPEG_BBC_INT_ADDR);
> + coda_write(dev, 64, CODA9_REG_JPEG_BBC_DATA_CNT);
> + coda_write(dev, 0, CODA9_REG_JPEG_BBC_COMMAND);
> + do {
> + ret = coda_read(dev, CODA9_REG_JPEG_BBC_BUSY);
> + } while (ret == 1);
> +
> + bbc_cur_pos++;
> + coda_write(dev, bbc_cur_pos, CODA9_REG_JPEG_BBC_CUR_POS);
> + coda_write(dev, bbc_base_addr + (bbc_cur_pos << 8),
> + CODA9_REG_JPEG_BBC_EXT_ADDR);
> + coda_write(dev, (bbc_cur_pos & 1) << 6, CODA9_REG_JPEG_BBC_INT_ADDR);
> + coda_write(dev, 64, CODA9_REG_JPEG_BBC_DATA_CNT);
> + coda_write(dev, 0, CODA9_REG_JPEG_BBC_COMMAND);
> + do {
> + ret = coda_read(dev, CODA9_REG_JPEG_BBC_BUSY);
> + } while (ret == 1);
> +
> + bbc_cur_pos++;
> + coda_write(dev, bbc_cur_pos, CODA9_REG_JPEG_BBC_CUR_POS);
> + coda_write(dev, 1, CODA9_REG_JPEG_BBC_CTRL);
> +
> + coda_write(dev, 0, CODA9_REG_JPEG_GBU_TT_CNT);
> + coda_write(dev, word_ptr, CODA9_REG_JPEG_GBU_WD_PTR);
> + coda_write(dev, 0, CODA9_REG_JPEG_GBU_BBSR);
> + coda_write(dev, 127, CODA9_REG_JPEG_GBU_BBER);
> + if (page_ptr & 1) {
> + coda_write(dev, 0, CODA9_REG_JPEG_GBU_BBIR);
> + coda_write(dev, 0, CODA9_REG_JPEG_GBU_BBHR);
> + } else {
> + coda_write(dev, 64, CODA9_REG_JPEG_GBU_BBIR);
> + coda_write(dev, 64, CODA9_REG_JPEG_GBU_BBHR);
> + }
> + coda_write(dev, 4, CODA9_REG_JPEG_GBU_CTRL);
> + coda_write(dev, bit_ptr, CODA9_REG_JPEG_GBU_FF_RPTR);
> + coda_write(dev, 3, CODA9_REG_JPEG_GBU_CTRL);
> +}
> +
> static const int bus_req_num[] = {
> [CODA9_JPEG_FORMAT_420] = 2,
> [CODA9_JPEG_FORMAT_422] = 3,
> @@ -341,6 +621,71 @@ static int coda9_jpeg_gen_enc_huff_tab(struct coda_ctx *ctx, int tab_num,
> #define DC_TABLE_INDEX1 2
> #define AC_TABLE_INDEX1 3
>
> +static u8 *coda9_jpeg_get_huff_bits(struct coda_ctx *ctx, int tab_num)
> +{
> + struct coda_huff_tab *huff_tab = ctx->params.jpeg_huff_tab;
> +
> + if (!huff_tab)
> + return NULL;
> +
> + switch (tab_num) {
> + case DC_TABLE_INDEX0: return huff_tab->dc_bits[0];
> + case AC_TABLE_INDEX0: return huff_tab->ac_bits[0];
> + case DC_TABLE_INDEX1: return huff_tab->dc_bits[1];
> + case AC_TABLE_INDEX1: return huff_tab->ac_bits[1];
> + }
> +
> + return NULL;
> +}
> +
> +static int coda9_jpeg_gen_dec_huff_tab(struct coda_ctx *ctx, int tab_num)
> +{
> + int ptr_cnt = 0, huff_code = 0, zero_flag = 0, data_flag = 0;
> + u8 *huff_bits;
> + s16 *huff_max;
> + s16 *huff_min;
> + s8 *huff_ptr;
> + int ofs;
> + int i;
> +
> + huff_bits = coda9_jpeg_get_huff_bits(ctx, tab_num);
> + if (!huff_bits)
> + return -EINVAL;
> +
> + /* DC/AC Luma, DC/AC Chroma -> DC Luma/Chroma, AC Luma/Chroma */
> + ofs = ((tab_num & 1) << 1) | ((tab_num >> 1) & 1);
> + ofs *= 16;
> +
> + huff_ptr = ctx->params.jpeg_huff_tab->ptr + ofs;
> + huff_max = ctx->params.jpeg_huff_tab->max + ofs;
> + huff_min = ctx->params.jpeg_huff_tab->min + ofs;
> +
> + for (i = 0; i < 16; i++) {
> + if (huff_bits[i]) {
> + huff_ptr[i] = ptr_cnt;
> + ptr_cnt += huff_bits[i];
> + huff_min[i] = huff_code;
> + huff_max[i] = huff_code + (huff_bits[i] - 1);
> + data_flag = 1;
> + zero_flag = 0;
> + } else {
> + huff_ptr[i] = -1;
> + huff_min[i] = -1;
> + huff_max[i] = -1;
> + zero_flag = 1;
> + }
> +
> + if (data_flag == 1) {
> + if (zero_flag == 1)
> + huff_code <<= 1;
> + else
> + huff_code = (huff_max[i] + 1) << 1;
> + }
> + }
> +
> + return 0;
> +}
> +
> static int coda9_jpeg_load_huff_tab(struct coda_ctx *ctx)
> {
> struct coda_dev *dev = ctx->dev;
> @@ -401,6 +746,8 @@ static inline void coda9_jpeg_write_qmat_quotients(struct coda_dev *dev,
> coda_write(dev, index, CODA9_REG_JPEG_QMAT_CTRL);
> }
>
> +static void coda_scale_quant_table(u8 *q_tab, int scale);
> +
> static int coda9_jpeg_load_qmat_tab(struct coda_ctx *ctx)
> {
> struct coda_dev *dev = ctx->dev;
> @@ -860,6 +1207,13 @@ static void coda9_jpeg_finish_encode(struct coda_ctx *ctx)
> coda_dbg(1, ctx, "job finished: encoded frame (%u)%s\n",
> dst_buf->sequence,
> (dst_buf->flags & V4L2_BUF_FLAG_LAST) ? " (last)" : "");
> +
> + /*
> + * Reset JPEG processing unit after each encode run to work
> + * around hangups when switching context between encoder and
> + * decoder.
> + */
> + coda_hw_reset(ctx);
> }
>
> static void coda9_jpeg_release(struct coda_ctx *ctx)
> @@ -872,6 +1226,7 @@ static void coda9_jpeg_release(struct coda_ctx *ctx)
> ctx->params.jpeg_qmat_tab[1] = NULL;
> for (i = 0; i < 3; i++)
> kfree(ctx->params.jpeg_qmat_tab[i]);
> + kfree(ctx->params.jpeg_huff_tab);
> }
>
> const struct coda_context_ops coda9_jpeg_encode_ops = {
> @@ -882,6 +1237,202 @@ const struct coda_context_ops coda9_jpeg_encode_ops = {
> .release = coda9_jpeg_release,
> };
>
> +/*
> + * Decoder context operations
> + */
> +
> +static int coda9_jpeg_start_decoding(struct coda_ctx *ctx)
> +{
> + ctx->params.jpeg_qmat_index[0] = 0;
> + ctx->params.jpeg_qmat_index[1] = 1;
> + ctx->params.jpeg_qmat_index[2] = 1;
> + ctx->params.jpeg_qmat_tab[0] = luma_q;
> + ctx->params.jpeg_qmat_tab[1] = chroma_q;
> + /* nothing more to do here */
> +
> + /* TODO: we could already scan the first header to get the chroma
> + * format.
> + */
> +
> + return 0;
> +}
> +
> +static int coda9_jpeg_prepare_decode(struct coda_ctx *ctx)
> +{
> + struct coda_dev *dev = ctx->dev;
> + int aligned_width, aligned_height;
> + int chroma_format;
> + int ret;
> + u32 val, dst_fourcc;
> + struct coda_q_data *q_data_dst;
> + struct vb2_v4l2_buffer *src_buf, *dst_buf;
> + int chroma_interleave;
> +
> + src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
> + dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
> + q_data_dst = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
> + dst_fourcc = q_data_dst->fourcc;
> +
> + if (vb2_get_plane_payload(&src_buf->vb2_buf, 0) == 0)
> + vb2_set_plane_payload(&src_buf->vb2_buf, 0,
> + vb2_plane_size(&src_buf->vb2_buf, 0));
> +
> + chroma_format = coda9_jpeg_chroma_format(q_data_dst->fourcc);
> + if (chroma_format < 0) {
> + v4l2_m2m_job_finish(ctx->dev->m2m_dev, ctx->fh.m2m_ctx);
> + return chroma_format;
> + }
> +
> + /* Round image dimensions to multiple of MCU size */
> + aligned_width = round_up(q_data_dst->width, width_align[chroma_format]);
> + aligned_height = round_up(q_data_dst->height,
> + height_align[chroma_format]);
> + if (aligned_width != q_data_dst->bytesperline) {
> + v4l2_err(&dev->v4l2_dev, "stride mismatch: %d != %d\n",
> + aligned_width, q_data_dst->bytesperline);
> + }
> +
> + coda_set_gdi_regs(ctx);
> +
> + ret = coda_jpeg_decode_header(ctx, &src_buf->vb2_buf);
> + if (ret < 0) {
> + v4l2_err(&dev->v4l2_dev, "failed to decode JPEG header: %d\n",
> + ret);
> +
> + src_buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
> + dst_buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
> + v4l2_m2m_buf_done(src_buf, VB2_BUF_STATE_DONE);
> + v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_DONE);
> +
> + v4l2_m2m_job_finish(ctx->dev->m2m_dev, ctx->fh.m2m_ctx);
> + return ret;
> + }
> +
> + val = ctx->params.jpeg_huff_ac_index[0] << 12 |
> + ctx->params.jpeg_huff_ac_index[1] << 11 |
> + ctx->params.jpeg_huff_ac_index[2] << 10 |
> + ctx->params.jpeg_huff_dc_index[0] << 9 |
> + ctx->params.jpeg_huff_dc_index[1] << 8 |
> + ctx->params.jpeg_huff_dc_index[2] << 7;
> + if (ctx->params.jpeg_huff_tab)
> + val |= CODA9_JPEG_PIC_CTRL_USER_HUFFMAN_EN;
> + coda_write(dev, val, CODA9_REG_JPEG_PIC_CTRL);
> +
> + coda_write(dev, aligned_width << 16 | aligned_height,
> + CODA9_REG_JPEG_PIC_SIZE);
> +
> + chroma_interleave = (dst_fourcc == V4L2_PIX_FMT_NV12);
> + coda_write(dev, 0, CODA9_REG_JPEG_ROT_INFO);
> + coda_write(dev, bus_req_num[chroma_format], CODA9_REG_JPEG_OP_INFO);
> + coda_write(dev, mcu_info[chroma_format], CODA9_REG_JPEG_MCU_INFO);
> + coda_write(dev, 0, CODA9_REG_JPEG_SCL_INFO);
> + coda_write(dev, chroma_interleave, CODA9_REG_JPEG_DPB_CONFIG);
> + coda_write(dev, ctx->params.jpeg_restart_interval,
> + CODA9_REG_JPEG_RST_INTVAL);
> +
> + if (ctx->params.jpeg_huff_tab) {
> + ret = coda9_jpeg_dec_huff_setup(ctx);
> + if (ret < 0) {
> + v4l2_err(&dev->v4l2_dev,
> + "failed to set up Huffman tables: %d\n", ret);
> + v4l2_m2m_job_finish(ctx->dev->m2m_dev, ctx->fh.m2m_ctx);
> + return ret;
> + }
> + }
> +
> + coda9_jpeg_qmat_setup(ctx);
> +
> + coda9_jpeg_dec_bbc_gbu_setup(ctx, &src_buf->vb2_buf,
> + ctx->jpeg_ecs_offset);
> +
> + coda_write(dev, 0, CODA9_REG_JPEG_RST_INDEX);
> + coda_write(dev, 0, CODA9_REG_JPEG_RST_COUNT);
> +
> + coda_write(dev, 0, CODA9_REG_JPEG_DPCM_DIFF_Y);
> + coda_write(dev, 0, CODA9_REG_JPEG_DPCM_DIFF_CB);
> + coda_write(dev, 0, CODA9_REG_JPEG_DPCM_DIFF_CR);
> +
> + coda_write(dev, 0, CODA9_REG_JPEG_ROT_INFO);
> +
> + coda_write(dev, 1, CODA9_GDI_CONTROL);
> + do {
> + ret = coda_read(dev, CODA9_GDI_STATUS);
> + } while (!ret);
> +
> + val = (chroma_format << 17) | (chroma_interleave << 16) |
> + q_data_dst->bytesperline;
> + if (ctx->tiled_map_type == GDI_TILED_FRAME_MB_RASTER_MAP)
> + val |= 3 << 20;
> + coda_write(dev, val, CODA9_GDI_INFO_CONTROL);
> +
> + coda_write(dev, aligned_width << 16 | aligned_height,
> + CODA9_GDI_INFO_PIC_SIZE);
> +
> + coda_write_base(ctx, q_data_dst, dst_buf, CODA9_GDI_INFO_BASE_Y);
> +
> + coda_write(dev, 0, CODA9_REG_JPEG_DPB_BASE00);
> + coda_write(dev, 0, CODA9_GDI_CONTROL);
> + coda_write(dev, 1, CODA9_GDI_PIC_INIT_HOST);
> +
> + trace_coda_jpeg_run(ctx, src_buf);
> +
> + coda_write(dev, 1, CODA9_REG_JPEG_PIC_START);
> +
> + return 0;
> +}
> +
> +static void coda9_jpeg_finish_decode(struct coda_ctx *ctx)
> +{
> + struct coda_dev *dev = ctx->dev;
> + struct vb2_v4l2_buffer *dst_buf, *src_buf;
> + struct coda_q_data *q_data_dst;
> + u32 err_mb;
> +
> + err_mb = coda_read(dev, CODA9_REG_JPEG_PIC_ERRMB);
> + if (err_mb)
> + v4l2_err(&dev->v4l2_dev, "ERRMB: 0x%x\n", err_mb);
> +
> + coda_write(dev, 0, CODA9_REG_JPEG_BBC_FLUSH_CMD);
> +
> + src_buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
> + dst_buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
> + dst_buf->sequence = ctx->osequence++;
> +
> + trace_coda_jpeg_done(ctx, dst_buf);
> +
> + dst_buf->flags &= ~(V4L2_BUF_FLAG_PFRAME | V4L2_BUF_FLAG_LAST);
> + dst_buf->flags |= V4L2_BUF_FLAG_KEYFRAME;
> + dst_buf->flags |= src_buf->flags & V4L2_BUF_FLAG_LAST;
> +
> + v4l2_m2m_buf_copy_metadata(src_buf, dst_buf, false);
> +
> + q_data_dst = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE);
> + vb2_set_plane_payload(&dst_buf->vb2_buf, 0, q_data_dst->sizeimage);
> +
> + v4l2_m2m_buf_done(src_buf, VB2_BUF_STATE_DONE);
> + coda_m2m_buf_done(ctx, dst_buf, err_mb ? VB2_BUF_STATE_ERROR :
> + VB2_BUF_STATE_DONE);
> +
> + coda_dbg(1, ctx, "job finished: decoded frame (%u)%s\n",
> + dst_buf->sequence,
> + (dst_buf->flags & V4L2_BUF_FLAG_LAST) ? " (last)" : "");
> +
> + /*
> + * Reset JPEG processing unit after each decode run to work
> + * around hangups when switching context between encoder and
> + * decoder.
> + */
> + coda_hw_reset(ctx);
> +}
> +
> +const struct coda_context_ops coda9_jpeg_decode_ops = {
> + .queue_init = coda_encoder_queue_init, /* non-bitstream operation */
> + .start_streaming = coda9_jpeg_start_decoding,
> + .prepare_run = coda9_jpeg_prepare_decode,
> + .finish_run = coda9_jpeg_finish_decode,
> + .release = coda9_jpeg_release,
> +};
> +
> irqreturn_t coda9_jpeg_irq_handler(int irq, void *data)
> {
> struct coda_dev *dev = data;
> diff --git a/drivers/media/platform/coda/coda.h b/drivers/media/platform/coda/coda.h
> index 98af53d11c1b..80a2cc1126bd 100644
> --- a/drivers/media/platform/coda/coda.h
> +++ b/drivers/media/platform/coda/coda.h
> @@ -69,7 +69,7 @@ struct coda_aux_buf {
>
> struct coda_dev {
> struct v4l2_device v4l2_dev;
> - struct video_device vfd[5];
> + struct video_device vfd[6];
> struct device *dev;
> const struct coda_devtype *devtype;
> int firmware;
> @@ -123,9 +123,15 @@ struct coda_params {
> u8 mpeg4_inter_qp;
> u8 gop_size;
> int intra_refresh;
> + u8 jpeg_format;
> u8 jpeg_quality;
> u8 jpeg_restart_interval;
> u8 *jpeg_qmat_tab[3];
> + int jpeg_qmat_index[3];
> + int jpeg_huff_dc_index[3];
> + int jpeg_huff_ac_index[3];
> + struct coda_huff_tab *jpeg_huff_tab;
> + u8 jpeg_chroma_subsampling[3];
> int codec_mode;
> int codec_mode_aux;
> enum v4l2_mpeg_video_multi_slice_mode slice_mode;
> @@ -237,6 +243,7 @@ struct coda_ctx {
> struct v4l2_fh fh;
> int gopcounter;
> int runcounter;
> + int jpeg_ecs_offset;
> char vpu_header[3][64];
> int vpu_header_size[3];
> struct kfifo bitstream_fifo;
> @@ -361,12 +368,14 @@ void coda_update_profile_level_ctrls(struct coda_ctx *ctx, u8 profile_idc,
> u8 level_idc);
>
> bool coda_jpeg_check_buffer(struct coda_ctx *ctx, struct vb2_buffer *vb);
> +int coda_jpeg_decode_header(struct coda_ctx *ctx, struct vb2_buffer *vb);
> int coda_jpeg_write_tables(struct coda_ctx *ctx);
> void coda_set_jpeg_compression_quality(struct coda_ctx *ctx, int quality);
>
> extern const struct coda_context_ops coda_bit_encode_ops;
> extern const struct coda_context_ops coda_bit_decode_ops;
> extern const struct coda_context_ops coda9_jpeg_encode_ops;
> +extern const struct coda_context_ops coda9_jpeg_decode_ops;
>
> irqreturn_t coda_irq_handler(int irq, void *data);
> irqreturn_t coda9_jpeg_irq_handler(int irq, void *data);
> --
> 2.20.1
>
Hi Philipp,
Thank you for the continuing improvements to the coda driver!
I've applied 'media: add v4l2 JPEG helpers' and this on top of 5.6-rc3
and it does decode but the colorspace looks all wrong (looks like a
planar issue). I'm testing this on an IMX6Q board with 'gst-launch-1.0
videotestsrc ! jpegenc ! v4l2jpegdec ! autovideosink'.
Any ideas what could be happening here? Do you have plans to re-submit
this and 'media: add v4l2 JPEG helpers'?
Best Regards,
Tim
