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SubjectRe: [PATCH v5,2/2] media: mediatek: vcodec: support stateless hevc decoder
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Il 24/05/23 04:16, Yunfei Dong ha scritto:
> Add mediatek hevc decoder linux driver which use the stateless API in MT8195.
>
> Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
> Tested-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
> Tested-by: Nathan Hebert <nhebert@chromium.org>
> ---
> .../media/platform/mediatek/vcodec/Makefile | 1 +
> .../vcodec/mtk_vcodec_dec_stateless.c | 59 +-
> .../platform/mediatek/vcodec/mtk_vcodec_drv.h | 1 +
> .../vcodec/vdec/vdec_hevc_req_multi_if.c | 1101 +++++++++++++++++
> .../platform/mediatek/vcodec/vdec_drv_if.c | 4 +
> .../platform/mediatek/vcodec/vdec_drv_if.h | 1 +
> 6 files changed, 1166 insertions(+), 1 deletion(-)
> create mode 100644 drivers/media/platform/mediatek/vcodec/vdec/vdec_hevc_req_multi_if.c
>

..snip..

> diff --git a/drivers/media/platform/mediatek/vcodec/vdec/vdec_hevc_req_multi_if.c b/drivers/media/platform/mediatek/vcodec/vdec/vdec_hevc_req_multi_if.c
> new file mode 100644
> index 000000000000..9a96547af33c
> --- /dev/null
> +++ b/drivers/media/platform/mediatek/vcodec/vdec/vdec_hevc_req_multi_if.c
> @@ -0,0 +1,1101 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (c) 2023 MediaTek Inc.
> + * Author: Yunfei Dong <yunfei.dong@mediatek.com>
> + */
> +

..snip..

> +
> +/**
> + * struct vdec_hevc_slice_share_info - shared information used to exchange
> + * message between lat and core
> + *
> + * @sps: sequence header information from user space
> + * @dec_params: decoder params from user space
> + * @hevc_slice_params: decoder params used for hardware
> + * @trans_start: trans start dma address
> + * @trans_end: trans end dma address

Wrong documentation, there's no trans_start, trans_end, but just `trans`.

> + */
> +struct vdec_hevc_slice_share_info {
> + struct v4l2_ctrl_hevc_sps sps;
> + struct v4l2_ctrl_hevc_decode_params dec_params;
> + struct vdec_hevc_slice_lat_dec_param hevc_slice_params;
> + struct vdec_hevc_slice_mem trans;
> +};
> +
> +/**
> + * struct vdec_hevc_slice_inst - hevc decoder instance
> + *
> + * @slice_dec_num: how many picture be decoded
> + * @ctx: point to mtk_vcodec_ctx
> + * @pred_buf: HW working predication buffer

pred_buf is not present in this structure; either add it and make use
of it, or remove the documentation for it.

> + * @mv_buf: HW working motion vector buffer
> + * @vpu: VPU instance
> + * @vsi: vsi used for lat
> + * @vsi_core: vsi used for core
> + * @wrap_addr: wrap address used for hevc
> + *
> + * @hevc_slice_param: the parameters that hardware use to decode
> + *
> + * @resolution_changed: resolution changed
> + * @realloc_mv_buf: reallocate mv buffer
> + * @cap_num_planes: number of capture queue plane
> + */
> +struct vdec_hevc_slice_inst {
> + unsigned int slice_dec_num;
> + struct mtk_vcodec_ctx *ctx;
> + struct mtk_vcodec_mem mv_buf[HEVC_MAX_MV_NUM];
> + struct vdec_vpu_inst vpu;
> + struct vdec_hevc_slice_vsi *vsi;
> + struct vdec_hevc_slice_vsi *vsi_core;
> + struct mtk_vcodec_mem wrap_addr;
> +
> + struct vdec_hevc_slice_lat_dec_param hevc_slice_param;
> +
> + unsigned int resolution_changed;
> + unsigned int realloc_mv_buf;
> + unsigned int cap_num_planes;
> +};
> +
> +static unsigned int vdec_hevc_get_mv_buf_size(unsigned int width, unsigned int height)
> +{
> + const int unit_size = (width / 16) * (height / 16) + 8;

This is supposed to be `const unsigned int`, otherwise you may overflow here (even
if it's unlikely to, but still....!)

> +
> + return 64 * unit_size;
> +}
> +

..snip..

> +static int vdec_hevc_slice_lat_decode(void *h_vdec, struct mtk_vcodec_mem *bs,
> + struct vdec_fb *fb, bool *res_chg)
> +{
> + struct vdec_hevc_slice_inst *inst = h_vdec;
> + struct vdec_vpu_inst *vpu = &inst->vpu;
> +

Please remove this extra empty line.

> + int err, timeout = 0;
> + unsigned int data[2];
> + struct vdec_lat_buf *lat_buf;
> + struct vdec_hevc_slice_share_info *share_info;
> +

...after which:

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>


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