Re: [PATCH v2 2/2] media: cedrus: Add H264 decoding support

From: Paul Kocialkowski
Date: Fri Nov 30 2018 - 07:37:32 EST

Hi,

On Thu, 2018-11-15 at 15:56 +0100, Maxime Ripard wrote:
> Introduce some basic H264 decoding support in cedrus. So far, only the
> baseline profile videos have been tested, and some more advanced features
> used in higher profiles are not even implemented.

Regarding the preparation of adresses, it seems that subtracting
PHYS_OFFSET does not work with more than 1 GiB of RAM available.

While platformes before the A33 can only map the first 256 MiB of RAM,
newer ones (starting with the A33) do not have this limitation and the
reserved memory can be set anywhere in RAM.

As an attempt to explain the issue, it could be that with 2 GiB
available, the VPU maps 0x0-0x40000000 to the second GiB of RAM so that
0x40000000-0x80000000 matches the first GiB RAM (like it's exposed to
the CPU). With only 1 GiB (or anything else that divides 1 GiB), that
same GiB is mapped from 0x0-0x40000000, 0x40000000-0x80000000 and so on,
so the issue does not occur.

I've discovered the issue while testing the H.265 series where I had
added the PHYS_OFFSET subtraction and found that the issue applied to
H.264 as well.

Cheers,

Paul

> Signed-off-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxx>
> ---
> drivers/staging/media/sunxi/cedrus/Makefile | 3 +-
> drivers/staging/media/sunxi/cedrus/cedrus.c | 25 +
> drivers/staging/media/sunxi/cedrus/cedrus.h | 35 +-
> .../staging/media/sunxi/cedrus/cedrus_dec.c | 11 +
> .../staging/media/sunxi/cedrus/cedrus_h264.c | 470 ++++++++++++++++++
> .../staging/media/sunxi/cedrus/cedrus_hw.c | 4 +
> .../staging/media/sunxi/cedrus/cedrus_regs.h | 63 +++
> .../staging/media/sunxi/cedrus/cedrus_video.c | 9 +
> 8 files changed, 618 insertions(+), 2 deletions(-)
> create mode 100644 drivers/staging/media/sunxi/cedrus/cedrus_h264.c
>
> diff --git a/drivers/staging/media/sunxi/cedrus/Makefile b/drivers/staging/media/sunxi/cedrus/Makefile
> index e9dc68b7bcb6..aaf141fc58b6 100644
> --- a/drivers/staging/media/sunxi/cedrus/Makefile
> +++ b/drivers/staging/media/sunxi/cedrus/Makefile
> @@ -1,3 +1,4 @@
> obj-$(CONFIG_VIDEO_SUNXI_CEDRUS) += sunxi-cedrus.o
>
> -sunxi-cedrus-y = cedrus.o cedrus_video.o cedrus_hw.o cedrus_dec.o cedrus_mpeg2.o
> +sunxi-cedrus-y = cedrus.o cedrus_video.o cedrus_hw.o cedrus_dec.o \
> + cedrus_mpeg2.o cedrus_h264.o
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.c b/drivers/staging/media/sunxi/cedrus/cedrus.c
> index 82558455384a..627a8c07eb21 100644
> --- a/drivers/staging/media/sunxi/cedrus/cedrus.c
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus.c
> @@ -40,6 +40,30 @@ static const struct cedrus_control cedrus_controls[] = {
> .codec = CEDRUS_CODEC_MPEG2,
> .required = false,
> },
> + {
> + .id = V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS,
> + .elem_size = sizeof(struct v4l2_ctrl_h264_decode_param),
> + .codec = CEDRUS_CODEC_H264,
> + .required = true,
> + },
> + {
> + .id = V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS,
> + .elem_size = sizeof(struct v4l2_ctrl_h264_slice_param),
> + .codec = CEDRUS_CODEC_H264,
> + .required = true,
> + },
> + {
> + .id = V4L2_CID_MPEG_VIDEO_H264_SPS,
> + .elem_size = sizeof(struct v4l2_ctrl_h264_sps),
> + .codec = CEDRUS_CODEC_H264,
> + .required = true,
> + },
> + {
> + .id = V4L2_CID_MPEG_VIDEO_H264_PPS,
> + .elem_size = sizeof(struct v4l2_ctrl_h264_pps),
> + .codec = CEDRUS_CODEC_H264,
> + .required = true,
> + },
> };
>
> #define CEDRUS_CONTROLS_COUNT ARRAY_SIZE(cedrus_controls)
> @@ -277,6 +301,7 @@ static int cedrus_probe(struct platform_device *pdev)
> }
>
> dev->dec_ops[CEDRUS_CODEC_MPEG2] = &cedrus_dec_ops_mpeg2;
> + dev->dec_ops[CEDRUS_CODEC_H264] = &cedrus_dec_ops_h264;
>
> mutex_init(&dev->dev_mutex);
> spin_lock_init(&dev->irq_lock);
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.h b/drivers/staging/media/sunxi/cedrus/cedrus.h
> index 781676b55a1b..179c10dcf6a7 100644
> --- a/drivers/staging/media/sunxi/cedrus/cedrus.h
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus.h
> @@ -30,7 +30,7 @@
>
> enum cedrus_codec {
> CEDRUS_CODEC_MPEG2,
> -
> + CEDRUS_CODEC_H264,
> CEDRUS_CODEC_LAST,
> };
>
> @@ -40,6 +40,12 @@ enum cedrus_irq_status {
> CEDRUS_IRQ_OK,
> };
>
> +enum cedrus_h264_pic_type {
> + CEDRUS_H264_PIC_TYPE_FRAME = 0,
> + CEDRUS_H264_PIC_TYPE_FIELD,
> + CEDRUS_H264_PIC_TYPE_MBAFF,
> +};
> +
> struct cedrus_control {
> u32 id;
> u32 elem_size;
> @@ -47,6 +53,13 @@ struct cedrus_control {
> unsigned char required:1;
> };
>
> +struct cedrus_h264_run {
> + const struct v4l2_ctrl_h264_decode_param *decode_param;
> + const struct v4l2_ctrl_h264_pps *pps;
> + const struct v4l2_ctrl_h264_slice_param *slice_param;
> + const struct v4l2_ctrl_h264_sps *sps;
> +};
> +
> struct cedrus_mpeg2_run {
> const struct v4l2_ctrl_mpeg2_slice_params *slice_params;
> const struct v4l2_ctrl_mpeg2_quantization *quantization;
> @@ -57,12 +70,20 @@ struct cedrus_run {
> struct vb2_v4l2_buffer *dst;
>
> union {
> + struct cedrus_h264_run h264;
> struct cedrus_mpeg2_run mpeg2;
> };
> };
>
> struct cedrus_buffer {
> struct v4l2_m2m_buffer m2m_buf;
> +
> + union {
> + struct {
> + unsigned int position;
> + enum cedrus_h264_pic_type pic_type;
> + } h264;
> + } codec;
> };
>
> struct cedrus_ctx {
> @@ -77,6 +98,17 @@ struct cedrus_ctx {
> struct v4l2_ctrl **ctrls;
>
> struct vb2_buffer *dst_bufs[VIDEO_MAX_FRAME];
> +
> + union {
> + struct {
> + void *mv_col_buf;
> + dma_addr_t mv_col_buf_dma;
> + ssize_t mv_col_buf_field_size;
> + ssize_t mv_col_buf_size;
> + void *pic_info_buf;
> + dma_addr_t pic_info_buf_dma;
> + } h264;
> + } codec;
> };
>
> struct cedrus_dec_ops {
> @@ -120,6 +152,7 @@ struct cedrus_dev {
> };
>
> extern struct cedrus_dec_ops cedrus_dec_ops_mpeg2;
> +extern struct cedrus_dec_ops cedrus_dec_ops_h264;
>
> static inline void cedrus_write(struct cedrus_dev *dev, u32 reg, u32 val)
> {
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
> index 0cfd6036d0cd..b606f07d94ab 100644
> --- a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
> @@ -49,6 +49,17 @@ void cedrus_device_run(void *priv)
> V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION);
> break;
>
> + case V4L2_PIX_FMT_H264_SLICE:
> + run.h264.decode_param = cedrus_find_control_data(ctx,
> + V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS);
> + run.h264.pps = cedrus_find_control_data(ctx,
> + V4L2_CID_MPEG_VIDEO_H264_PPS);
> + run.h264.slice_param = cedrus_find_control_data(ctx,
> + V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS);
> + run.h264.sps = cedrus_find_control_data(ctx,
> + V4L2_CID_MPEG_VIDEO_H264_SPS);
> + break;
> +
> default:
> break;
> }
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_h264.c b/drivers/staging/media/sunxi/cedrus/cedrus_h264.c
> new file mode 100644
> index 000000000000..5459a936b4b9
> --- /dev/null
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus_h264.c
> @@ -0,0 +1,470 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Copyright (c) 2013 Jens Kuske <jenskuske@xxxxxxxxx>
> + * Copyright (c) 2018 Bootlin
> + */
> +
> +#include <linux/types.h>
> +
> +#include <media/videobuf2-dma-contig.h>
> +
> +#include "cedrus.h"
> +#include "cedrus_hw.h"
> +#include "cedrus_regs.h"
> +
> +enum cedrus_h264_sram_off {
> + CEDRUS_SRAM_H264_PRED_WEIGHT_TABLE = 0x000,
> + CEDRUS_SRAM_H264_FRAMEBUFFER_LIST = 0x100,
> + CEDRUS_SRAM_H264_REF_LIST_0 = 0x190,
> + CEDRUS_SRAM_H264_REF_LIST_1 = 0x199,
> + CEDRUS_SRAM_H264_SCALING_LIST_8x8 = 0x200,
> + CEDRUS_SRAM_H264_SCALING_LIST_4x4 = 0x218,
> +};
> +
> +struct cedrus_h264_sram_ref_pic {
> + __le32 top_field_order_cnt;
> + __le32 bottom_field_order_cnt;
> + __le32 frame_info;
> + __le32 luma_ptr;
> + __le32 chroma_ptr;
> + __le32 mv_col_top_ptr;
> + __le32 mv_col_bot_ptr;
> + __le32 reserved;
> +} __packed;
> +
> +/* One for the output, 16 for the reference images */
> +#define CEDRUS_H264_FRAME_NUM 17
> +
> +#define CEDRUS_PIC_INFO_BUF_SIZE (128 * SZ_1K)
> +
> +static void cedrus_h264_write_sram(struct cedrus_dev *dev,
> + enum cedrus_h264_sram_off off,
> + const void *data, size_t len)
> +{
> + const u32 *buffer = data;
> + size_t count = DIV_ROUND_UP(len, 4);
> +
> + cedrus_write(dev, VE_AVC_SRAM_PORT_OFFSET, off << 2);
> +
> + do {
> + cedrus_write(dev, VE_AVC_SRAM_PORT_DATA, *buffer++);
> + } while (--count);
> +}
> +
> +static dma_addr_t cedrus_h264_mv_col_buf_addr(struct cedrus_ctx *ctx,
> + unsigned int position,
> + unsigned int field)
> +{
> + dma_addr_t addr = ctx->codec.h264.mv_col_buf_dma - PHYS_OFFSET;
> +
> + /* Adjust for the position */
> + addr += position * ctx->codec.h264.mv_col_buf_field_size * 2;
> +
> + /* Adjust for the field */
> + addr += field * ctx->codec.h264.mv_col_buf_field_size;
> +
> + return addr;
> +}
> +
> +static void cedrus_fill_ref_pic(struct cedrus_ctx *ctx,
> + struct cedrus_buffer *buf,
> + unsigned int top_field_order_cnt,
> + unsigned int bottom_field_order_cnt,
> + struct cedrus_h264_sram_ref_pic *pic)
> +{
> + struct vb2_buffer *vbuf = &buf->m2m_buf.vb.vb2_buf;
> + unsigned int position = buf->codec.h264.position;
> +
> + pic->top_field_order_cnt = top_field_order_cnt;
> + pic->bottom_field_order_cnt = bottom_field_order_cnt;
> + pic->frame_info = buf->codec.h264.pic_type << 8;
> +
> + pic->luma_ptr = cedrus_buf_addr(vbuf, &ctx->dst_fmt, 0) - PHYS_OFFSET;
> + pic->chroma_ptr = cedrus_buf_addr(vbuf, &ctx->dst_fmt, 1) - PHYS_OFFSET;
> + pic->mv_col_top_ptr = cedrus_h264_mv_col_buf_addr(ctx, position, 0);
> + pic->mv_col_bot_ptr = cedrus_h264_mv_col_buf_addr(ctx, position, 1);
> +}
> +
> +static void cedrus_write_frame_list(struct cedrus_ctx *ctx,
> + struct cedrus_run *run)
> +{
> + struct cedrus_h264_sram_ref_pic pic_list[CEDRUS_H264_FRAME_NUM];
> + const struct v4l2_ctrl_h264_decode_param *dec_param = run->h264.decode_param;
> + const struct v4l2_ctrl_h264_slice_param *slice = run->h264.slice_param;
> + const struct v4l2_ctrl_h264_sps *sps = run->h264.sps;
> + struct vb2_queue *cap_q = &ctx->fh.m2m_ctx->cap_q_ctx.q;
> + struct cedrus_buffer *output_buf;
> + struct cedrus_dev *dev = ctx->dev;
> + unsigned long used_dpbs = 0;
> + unsigned int position;
> + unsigned int output = 0;
> + unsigned int i;
> +
> + memset(pic_list, 0, sizeof(pic_list));
> +
> + for (i = 0; i < ARRAY_SIZE(dec_param->dpb); i++) {
> + const struct v4l2_h264_dpb_entry *dpb = &dec_param->dpb[i];
> + struct cedrus_buffer *cedrus_buf;
> + int buf_idx;
> +
> + if (!(dpb->flags & V4L2_H264_DPB_ENTRY_FLAG_VALID))
> + continue;
> +
> + buf_idx = vb2_find_tag(cap_q, dpb->tag, 0);
> + if (buf_idx < 0)
> + continue;
> +
> + cedrus_buf = vb2_to_cedrus_buffer(ctx->dst_bufs[buf_idx]);
> + position = cedrus_buf->codec.h264.position;
> + used_dpbs |= BIT(position);
> +
> + if (!(dpb->flags & V4L2_H264_DPB_ENTRY_FLAG_ACTIVE))
> + continue;
> +
> + cedrus_fill_ref_pic(ctx, cedrus_buf,
> + dpb->top_field_order_cnt,
> + dpb->bottom_field_order_cnt,
> + &pic_list[position]);
> +
> + output = max(position, output);
> + }
> +
> + position = find_next_zero_bit(&used_dpbs, CEDRUS_H264_FRAME_NUM,
> + output);
> + if (position >= CEDRUS_H264_FRAME_NUM)
> + position = find_first_zero_bit(&used_dpbs, CEDRUS_H264_FRAME_NUM);
> +
> + output_buf = vb2_to_cedrus_buffer(&run->dst->vb2_buf);
> + output_buf->codec.h264.position = position;
> +
> + if (slice->flags & V4L2_H264_SLICE_FLAG_FIELD_PIC)
> + output_buf->codec.h264.pic_type = CEDRUS_H264_PIC_TYPE_FIELD;
> + else if (sps->flags & V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD)
> + output_buf->codec.h264.pic_type = CEDRUS_H264_PIC_TYPE_MBAFF;
> + else
> + output_buf->codec.h264.pic_type = CEDRUS_H264_PIC_TYPE_FRAME;
> +
> + cedrus_fill_ref_pic(ctx, output_buf,
> + dec_param->top_field_order_cnt,
> + dec_param->bottom_field_order_cnt,
> + &pic_list[position]);
> +
> + cedrus_h264_write_sram(dev, CEDRUS_SRAM_H264_FRAMEBUFFER_LIST,
> + pic_list, sizeof(pic_list));
> +
> + cedrus_write(dev, VE_H264_OUTPUT_FRAME_IDX, position);
> +}
> +
> +#define CEDRUS_MAX_REF_IDX 32
> +
> +static void _cedrus_write_ref_list(struct cedrus_ctx *ctx,
> + struct cedrus_run *run,
> + const u8 *ref_list, u8 num_ref,
> + enum cedrus_h264_sram_off sram)
> +{
> + const struct v4l2_ctrl_h264_decode_param *decode = run->h264.decode_param;
> + struct vb2_queue *cap_q = &ctx->fh.m2m_ctx->cap_q_ctx.q;
> + struct cedrus_dev *dev = ctx->dev;
> + u32 sram_array[CEDRUS_MAX_REF_IDX / sizeof(u32)];
> + unsigned int size, i;
> +
> + memset(sram_array, 0, sizeof(sram_array));
> +
> + for (i = 0; i < num_ref; i += 4) {
> + unsigned int j;
> +
> + for (j = 0; j < 4; j++) {
> + const struct v4l2_h264_dpb_entry *dpb;
> + const struct cedrus_buffer *cedrus_buf;
> + const struct vb2_v4l2_buffer *ref_buf;
> + unsigned int position;
> + int buf_idx;
> + u8 ref_idx = i + j;
> + u8 dpb_idx;
> +
> + if (ref_idx >= num_ref)
> + break;
> +
> + dpb_idx = ref_list[ref_idx];
> + dpb = &decode->dpb[dpb_idx];
> +
> + if (!(dpb->flags & V4L2_H264_DPB_ENTRY_FLAG_ACTIVE))
> + continue;
> +
> + buf_idx = vb2_find_tag(cap_q, dpb->tag, 0);
> + if (buf_idx < 0)
> + continue;
> +
> + ref_buf = to_vb2_v4l2_buffer(ctx->dst_bufs[buf_idx]);
> + cedrus_buf = vb2_v4l2_to_cedrus_buffer(ref_buf);
> + position = cedrus_buf->codec.h264.position;
> +
> + sram_array[i] |= position << (j * 8 + 1);
> + if (ref_buf->field == V4L2_FIELD_BOTTOM)
> + sram_array[i] |= BIT(j * 8);
> + }
> + }
> +
> + size = min((unsigned int)ALIGN(num_ref, 4), sizeof(sram_array));
> + cedrus_h264_write_sram(dev, sram, &sram_array, size);
> +}
> +
> +static void cedrus_write_ref_list0(struct cedrus_ctx *ctx,
> + struct cedrus_run *run)
> +{
> + const struct v4l2_ctrl_h264_slice_param *slice = run->h264.slice_param;
> +
> + _cedrus_write_ref_list(ctx, run,
> + slice->ref_pic_list0,
> + slice->num_ref_idx_l0_active_minus1 + 1,
> + CEDRUS_SRAM_H264_REF_LIST_0);
> +}
> +
> +static void cedrus_write_ref_list1(struct cedrus_ctx *ctx,
> + struct cedrus_run *run)
> +{
> + const struct v4l2_ctrl_h264_slice_param *slice = run->h264.slice_param;
> +
> + _cedrus_write_ref_list(ctx, run,
> + slice->ref_pic_list1,
> + slice->num_ref_idx_l1_active_minus1 + 1,
> + CEDRUS_SRAM_H264_REF_LIST_1);
> +}
> +
> +static void cedrus_set_params(struct cedrus_ctx *ctx,
> + struct cedrus_run *run)
> +{
> + const struct v4l2_ctrl_h264_slice_param *slice = run->h264.slice_param;
> + const struct v4l2_ctrl_h264_pps *pps = run->h264.pps;
> + const struct v4l2_ctrl_h264_sps *sps = run->h264.sps;
> + struct cedrus_dev *dev = ctx->dev;
> + dma_addr_t src_buf_addr;
> + u32 offset = slice->header_bit_size;
> + u32 len = (slice->size * 8) - offset;
> + u32 reg;
> +
> + cedrus_write(dev, 0x220, 0x02000400);
> + cedrus_write(dev, VE_H264_VLD_LEN, len);
> + cedrus_write(dev, VE_H264_VLD_OFFSET, offset);
> +
> + src_buf_addr = vb2_dma_contig_plane_dma_addr(&run->src->vb2_buf, 0);
> + src_buf_addr -= PHYS_OFFSET;
> + cedrus_write(dev, VE_H264_VLD_END, src_buf_addr + VBV_SIZE - 1);
> + cedrus_write(dev, VE_H264_VLD_ADDR,
> + VE_H264_VLD_ADDR_VAL(src_buf_addr) |
> + VE_H264_VLD_ADDR_FIRST | VE_H264_VLD_ADDR_VALID |
> + VE_H264_VLD_ADDR_LAST);
> +
> + /*
> + * FIXME: Since the bitstream parsing is done in software, and
> + * in userspace, this shouldn't be needed anymore. But it
> + * turns out that removing it breaks the decoding process,
> + * without any clear indication why.
> + */
> + cedrus_write(dev, VE_H264_TRIGGER_TYPE,
> + VE_H264_TRIGGER_TYPE_INIT_SWDEC);
> +
> + if ((slice->slice_type == V4L2_H264_SLICE_TYPE_P) ||
> + (slice->slice_type == V4L2_H264_SLICE_TYPE_SP) ||
> + (slice->slice_type == V4L2_H264_SLICE_TYPE_B))
> + cedrus_write_ref_list0(ctx, run);
> +
> + if (slice->slice_type == V4L2_H264_SLICE_TYPE_B)
> + cedrus_write_ref_list1(ctx, run);
> +
> + // picture parameters
> + reg = 0;
> + /*
> + * FIXME: the kernel headers are allowing the default value to
> + * be passed, but the libva doesn't give us that.
> + */
> + reg |= (slice->num_ref_idx_l0_active_minus1 & 0x1f) << 10;
> + reg |= (slice->num_ref_idx_l1_active_minus1 & 0x1f) << 5;
> + reg |= (pps->weighted_bipred_idc & 0x3) << 2;
> + if (pps->flags & V4L2_H264_PPS_FLAG_ENTROPY_CODING_MODE)
> + reg |= BIT(15);
> + if (pps->flags & V4L2_H264_PPS_FLAG_WEIGHTED_PRED)
> + reg |= BIT(4);
> + if (pps->flags & V4L2_H264_PPS_FLAG_CONSTRAINED_INTRA_PRED)
> + reg |= BIT(1);
> + if (pps->flags & V4L2_H264_PPS_FLAG_TRANSFORM_8X8_MODE)
> + reg |= BIT(0);
> + cedrus_write(dev, VE_H264_PIC_HDR, reg);
> +
> + // sequence parameters
> + reg = BIT(19);
> + reg |= (sps->pic_width_in_mbs_minus1 & 0xff) << 8;
> + reg |= sps->pic_height_in_map_units_minus1 & 0xff;
> + if (sps->flags & V4L2_H264_SPS_FLAG_FRAME_MBS_ONLY)
> + reg |= BIT(18);
> + if (sps->flags & V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD)
> + reg |= BIT(17);
> + if (sps->flags & V4L2_H264_SPS_FLAG_DIRECT_8X8_INFERENCE)
> + reg |= BIT(16);
> + cedrus_write(dev, VE_H264_FRAME_SIZE, reg);
> +
> + // slice parameters
> + reg = 0;
> + /*
> + * FIXME: This bit marks all the frames as references. This
> + * should probably be set based on nal_ref_idc, but the libva
> + * doesn't pass that information along, so this is not always
> + * available. We should find something else, maybe change the
> + * kernel UAPI somehow?
> + */
> + reg |= BIT(12);
> + reg |= (slice->slice_type & 0xf) << 8;
> + reg |= slice->cabac_init_idc & 0x3;
> + reg |= BIT(5);
> + if (slice->flags & V4L2_H264_SLICE_FLAG_FIELD_PIC)
> + reg |= BIT(4);
> + if (slice->flags & V4L2_H264_SLICE_FLAG_BOTTOM_FIELD)
> + reg |= BIT(3);
> + if (slice->flags & V4L2_H264_SLICE_FLAG_DIRECT_SPATIAL_MV_PRED)
> + reg |= BIT(2);
> + cedrus_write(dev, VE_H264_SLICE_HDR, reg);
> +
> + reg = 0;
> + reg |= (slice->num_ref_idx_l0_active_minus1 & 0x1f) << 24;
> + reg |= (slice->num_ref_idx_l1_active_minus1 & 0x1f) << 16;
> + reg |= (slice->disable_deblocking_filter_idc & 0x3) << 8;
> + reg |= (slice->slice_alpha_c0_offset_div2 & 0xf) << 4;
> + reg |= slice->slice_beta_offset_div2 & 0xf;
> + cedrus_write(dev, VE_H264_SLICE_HDR2, reg);
> +
> + reg = 0;
> + /*
> + * FIXME: This bit tells the video engine to use the default
> + * quantization matrices. This will obviously need to be
> + * changed to support the profiles supporting custom
> + * quantization matrices.
> + */
> + reg |= BIT(24);
> + reg |= (pps->second_chroma_qp_index_offset & 0x3f) << 16;
> + reg |= (pps->chroma_qp_index_offset & 0x3f) << 8;
> + reg |= (pps->pic_init_qp_minus26 + 26 + slice->slice_qp_delta) & 0x3f;
> + cedrus_write(dev, VE_H264_QP_PARAM, reg);
> +
> + // clear status flags
> + cedrus_write(dev, VE_H264_STATUS, cedrus_read(dev, VE_H264_STATUS));
> +
> + // enable int
> + reg = cedrus_read(dev, VE_H264_CTRL) | 0x7;
> + cedrus_write(dev, VE_H264_CTRL, reg);
> +}
> +
> +static enum cedrus_irq_status
> +cedrus_h264_irq_status(struct cedrus_ctx *ctx)
> +{
> + struct cedrus_dev *dev = ctx->dev;
> + u32 reg = cedrus_read(dev, VE_H264_STATUS) & 0x7;
> +
> + if (!reg)
> + return CEDRUS_IRQ_NONE;
> +
> + if (reg & (BIT(1) | BIT(2)))
> + return CEDRUS_IRQ_ERROR;
> +
> + return CEDRUS_IRQ_OK;
> +}
> +
> +static void cedrus_h264_irq_clear(struct cedrus_ctx *ctx)
> +{
> + struct cedrus_dev *dev = ctx->dev;
> +
> + cedrus_write(dev, VE_H264_STATUS, GENMASK(2, 0));
> +}
> +
> +static void cedrus_h264_irq_disable(struct cedrus_ctx *ctx)
> +{
> + struct cedrus_dev *dev = ctx->dev;
> + u32 reg = cedrus_read(dev, VE_H264_CTRL) & ~GENMASK(2, 0);
> +
> + cedrus_write(dev, VE_H264_CTRL, reg);
> +}
> +
> +static void cedrus_h264_setup(struct cedrus_ctx *ctx,
> + struct cedrus_run *run)
> +{
> + struct cedrus_dev *dev = ctx->dev;
> +
> + cedrus_engine_enable(dev, CEDRUS_CODEC_H264);
> +
> + cedrus_write(dev, VE_H264_SDROT_CTRL, 0);
> + cedrus_write(dev, VE_H264_EXTRA_BUFFER1,
> + ctx->codec.h264.pic_info_buf_dma - PHYS_OFFSET);
> + cedrus_write(dev, VE_H264_EXTRA_BUFFER2,
> + (ctx->codec.h264.pic_info_buf_dma - PHYS_OFFSET) + 0x48000);
> +
> + cedrus_write_frame_list(ctx, run);
> +
> + cedrus_set_params(ctx, run);
> +}
> +
> +static int cedrus_h264_start(struct cedrus_ctx *ctx)
> +{
> + struct cedrus_dev *dev = ctx->dev;
> + unsigned int field_size;
> + unsigned int mv_col_size;
> + int ret;
> +
> + ctx->codec.h264.pic_info_buf =
> + dma_alloc_coherent(dev->dev, CEDRUS_PIC_INFO_BUF_SIZE,
> + &ctx->codec.h264.pic_info_buf_dma,
> + GFP_KERNEL);
> + if (!ctx->codec.h264.pic_info_buf)
> + return -ENOMEM;
> +
> + field_size = DIV_ROUND_UP(ctx->src_fmt.width, 16) *
> + DIV_ROUND_UP(ctx->src_fmt.height, 16) * 32;
> + ctx->codec.h264.mv_col_buf_field_size = field_size;
> +
> + mv_col_size = field_size * 2 * CEDRUS_H264_FRAME_NUM;
> + ctx->codec.h264.mv_col_buf_size = mv_col_size;
> + ctx->codec.h264.mv_col_buf = dma_alloc_coherent(dev->dev,
> + ctx->codec.h264.mv_col_buf_size,
> + &ctx->codec.h264.mv_col_buf_dma,
> + GFP_KERNEL);
> + if (!ctx->codec.h264.mv_col_buf) {
> + ret = -ENOMEM;
> + goto err_pic_buf;
> + }
> +
> + return 0;
> +
> +err_pic_buf:
> + dma_free_coherent(dev->dev, CEDRUS_PIC_INFO_BUF_SIZE,
> + ctx->codec.h264.pic_info_buf,
> + ctx->codec.h264.pic_info_buf_dma);
> + return ret;
> +}
> +
> +static void cedrus_h264_stop(struct cedrus_ctx *ctx)
> +{
> + struct cedrus_dev *dev = ctx->dev;
> +
> + dma_free_coherent(dev->dev, ctx->codec.h264.mv_col_buf_size,
> + ctx->codec.h264.mv_col_buf,
> + ctx->codec.h264.mv_col_buf_dma);
> + dma_free_coherent(dev->dev, CEDRUS_PIC_INFO_BUF_SIZE,
> + ctx->codec.h264.pic_info_buf,
> + ctx->codec.h264.pic_info_buf_dma);
> +}
> +
> +static void cedrus_h264_trigger(struct cedrus_ctx *ctx)
> +{
> + struct cedrus_dev *dev = ctx->dev;
> +
> + cedrus_write(dev, VE_H264_TRIGGER_TYPE,
> + VE_H264_TRIGGER_TYPE_AVC_SLICE_DECODE);
> +}
> +
> +struct cedrus_dec_ops cedrus_dec_ops_h264 = {
> + .irq_clear = cedrus_h264_irq_clear,
> + .irq_disable = cedrus_h264_irq_disable,
> + .irq_status = cedrus_h264_irq_status,
> + .setup = cedrus_h264_setup,
> + .start = cedrus_h264_start,
> + .stop = cedrus_h264_stop,
> + .trigger = cedrus_h264_trigger,
> +};
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_hw.c b/drivers/staging/media/sunxi/cedrus/cedrus_hw.c
> index 32adbcbe6175..8e559454ca82 100644
> --- a/drivers/staging/media/sunxi/cedrus/cedrus_hw.c
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus_hw.c
> @@ -46,6 +46,10 @@ int cedrus_engine_enable(struct cedrus_dev *dev, enum cedrus_codec codec)
> reg |= VE_MODE_DEC_MPEG;
> break;
>
> + case CEDRUS_CODEC_H264:
> + reg |= VE_MODE_DEC_H264;
> + break;
> +
> default:
> return -EINVAL;
> }
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_regs.h b/drivers/staging/media/sunxi/cedrus/cedrus_regs.h
> index de2d6b6f64bf..6fe9896a506d 100644
> --- a/drivers/staging/media/sunxi/cedrus/cedrus_regs.h
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus_regs.h
> @@ -232,4 +232,67 @@
> #define VE_DEC_MPEG_ROT_LUMA (VE_ENGINE_DEC_MPEG + 0xcc)
> #define VE_DEC_MPEG_ROT_CHROMA (VE_ENGINE_DEC_MPEG + 0xd0)
>
> +/* FIXME: Legacy below. */
> +
> +#define VBV_SIZE (1024 * 1024)
> +
> +#define VE_H264_FRAME_SIZE 0x200
> +#define VE_H264_PIC_HDR 0x204
> +#define VE_H264_SLICE_HDR 0x208
> +#define VE_H264_SLICE_HDR2 0x20c
> +#define VE_H264_PRED_WEIGHT 0x210
> +#define VE_H264_QP_PARAM 0x21c
> +#define VE_H264_CTRL 0x220
> +
> +#define VE_H264_TRIGGER_TYPE 0x224
> +#define VE_H264_TRIGGER_TYPE_AVC_SLICE_DECODE (8 << 0)
> +#define VE_H264_TRIGGER_TYPE_INIT_SWDEC (7 << 0)
> +
> +#define VE_H264_STATUS 0x228
> +#define VE_H264_CUR_MB_NUM 0x22c
> +
> +#define VE_H264_VLD_ADDR 0x230
> +#define VE_H264_VLD_ADDR_FIRST BIT(30)
> +#define VE_H264_VLD_ADDR_LAST BIT(29)
> +#define VE_H264_VLD_ADDR_VALID BIT(28)
> +#define VE_H264_VLD_ADDR_VAL(x) (((x) & 0x0ffffff0) | ((x) >> 28))
> +
> +#define VE_H264_VLD_OFFSET 0x234
> +#define VE_H264_VLD_LEN 0x238
> +#define VE_H264_VLD_END 0x23c
> +#define VE_H264_SDROT_CTRL 0x240
> +#define VE_H264_OUTPUT_FRAME_IDX 0x24c
> +#define VE_H264_EXTRA_BUFFER1 0x250
> +#define VE_H264_EXTRA_BUFFER2 0x254
> +#define VE_H264_BASIC_BITS 0x2dc
> +#define VE_AVC_SRAM_PORT_OFFSET 0x2e0
> +#define VE_AVC_SRAM_PORT_DATA 0x2e4
> +
> +#define VE_ISP_INPUT_SIZE 0xa00
> +#define VE_ISP_INPUT_STRIDE 0xa04
> +#define VE_ISP_CTRL 0xa08
> +#define VE_ISP_INPUT_LUMA 0xa78
> +#define VE_ISP_INPUT_CHROMA 0xa7c
> +
> +#define VE_AVC_PARAM 0xb04
> +#define VE_AVC_QP 0xb08
> +#define VE_AVC_MOTION_EST 0xb10
> +#define VE_AVC_CTRL 0xb14
> +#define VE_AVC_TRIGGER 0xb18
> +#define VE_AVC_STATUS 0xb1c
> +#define VE_AVC_BASIC_BITS 0xb20
> +#define VE_AVC_UNK_BUF 0xb60
> +#define VE_AVC_VLE_ADDR 0xb80
> +#define VE_AVC_VLE_END 0xb84
> +#define VE_AVC_VLE_OFFSET 0xb88
> +#define VE_AVC_VLE_MAX 0xb8c
> +#define VE_AVC_VLE_LENGTH 0xb90
> +#define VE_AVC_REF_LUMA 0xba0
> +#define VE_AVC_REF_CHROMA 0xba4
> +#define VE_AVC_REC_LUMA 0xbb0
> +#define VE_AVC_REC_CHROMA 0xbb4
> +#define VE_AVC_REF_SLUMA 0xbb8
> +#define VE_AVC_REC_SLUMA 0xbbc
> +#define VE_AVC_MB_INFO 0xbc0
> +
> #endif
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_video.c b/drivers/staging/media/sunxi/cedrus/cedrus_video.c
> index 293df48326cc..7be2caacddde 100644
> --- a/drivers/staging/media/sunxi/cedrus/cedrus_video.c
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus_video.c
> @@ -37,6 +37,10 @@ static struct cedrus_format cedrus_formats[] = {
> .pixelformat = V4L2_PIX_FMT_MPEG2_SLICE,
> .directions = CEDRUS_DECODE_SRC,
> },
> + {
> + .pixelformat = V4L2_PIX_FMT_H264_SLICE,
> + .directions = CEDRUS_DECODE_SRC,
> + },
> {
> .pixelformat = V4L2_PIX_FMT_SUNXI_TILED_NV12,
> .directions = CEDRUS_DECODE_DST,
> @@ -100,6 +104,7 @@ static void cedrus_prepare_format(struct v4l2_pix_format *pix_fmt)
>
> switch (pix_fmt->pixelformat) {
> case V4L2_PIX_FMT_MPEG2_SLICE:
> + case V4L2_PIX_FMT_H264_SLICE:
> /* Zero bytes per line for encoded source. */
> bytesperline = 0;
>
> @@ -451,6 +456,10 @@ static int cedrus_start_streaming(struct vb2_queue *vq, unsigned int count)
> ctx->current_codec = CEDRUS_CODEC_MPEG2;
> break;
>
> + case V4L2_PIX_FMT_H264_SLICE:
> + ctx->current_codec = CEDRUS_CODEC_H264;
> + break;
> +
> default:
> return -EINVAL;
> }
--
Paul Kocialkowski, Bootlin (formerly Free Electrons)
Embedded Linux and kernel engineering
https://bootlin.com

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