[PATCH] [media] mtk-vcodec: fix vp9 decode error

[Wu-Cheng Li (李務誠)]

Reviewed-by: Wu-Cheng Li <wuchengli at chromium.org>
Tested-by: Wu-Cheng Li <wuchengli at chromium.org>

On Wed, Jul 19, 2017 at 5:22 PM, Tiffany Lin <tiffany.lin at mediatek.com> wrote:
> Fix The camera has a blurry screen phenomenon when
> we video chat with apprtc using vp9 codec
>
> Signed-off-by: Tiffany Lin <tiffany.lin at mediatek.com>
> ---
>  .../media/platform/mtk-vcodec/vdec/vdec_vp9_if.c   | 37 ++++++++++++++++++++--
>  1 file changed, 35 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/media/platform/mtk-vcodec/vdec/vdec_vp9_if.c b/drivers/media/platform/mtk-vcodec/vdec/vdec_vp9_if.c
> index 1daee12..bc8349b 100644
> --- a/drivers/media/platform/mtk-vcodec/vdec/vdec_vp9_if.c
> +++ b/drivers/media/platform/mtk-vcodec/vdec/vdec_vp9_if.c
> @@ -31,6 +31,7 @@
>  #define MAX_NUM_REF_FRAMES 8
>  #define VP9_MAX_FRM_BUF_NUM 9
>  #define VP9_MAX_FRM_BUF_NODE_NUM (VP9_MAX_FRM_BUF_NUM * 2)
> +#define VP9_SEG_ID_SZ 0x12000
>
>  /**
>   * struct vp9_dram_buf - contains buffer info for vpu
> @@ -132,6 +133,7 @@ struct vp9_sf_ref_fb {
>   * @frm_num : decoded frame number, include sub-frame count (AP-R, VPU-W)
>   * @mv_buf : motion vector working buffer (AP-W, VPU-R)
>   * @frm_refs : maintain three reference buffer info (AP-R/W, VPU-R/W)
> + * @seg_id_buf : segmentation map working buffer (AP-W, VPU-R)
>   */
>  struct vdec_vp9_vsi {
>         unsigned char sf_bs_buf[VP9_SUPER_FRAME_BS_SZ];
> @@ -167,11 +169,14 @@ struct vdec_vp9_vsi {
>         struct vp9_dram_buf mv_buf;
>
>         struct vp9_ref_buf frm_refs[REFS_PER_FRAME];
> +       struct vp9_dram_buf seg_id_buf;
> +
>  };
>
>  /*
>   * struct vdec_vp9_inst - vp9 decode instance
>   * @mv_buf : working buffer for mv
> + * @seg_id_buf : working buffer for segmentation map
>   * @dec_fb : vdec_fb node to link fb to different fb_xxx_list
>   * @available_fb_node_list : current available vdec_fb node
>   * @fb_use_list : current used or referenced vdec_fb
> @@ -187,6 +192,7 @@ struct vdec_vp9_vsi {
>   */
>  struct vdec_vp9_inst {
>         struct mtk_vcodec_mem mv_buf;
> +       struct mtk_vcodec_mem seg_id_buf;
>
>         struct vdec_fb_node dec_fb[VP9_MAX_FRM_BUF_NODE_NUM];
>         struct list_head available_fb_node_list;
> @@ -388,13 +394,11 @@ static bool vp9_alloc_work_buf(struct vdec_vp9_inst *inst)
>                         vsi->buf_h);
>
>         mem = &inst->mv_buf;
> -
>         if (mem->va)
>                 mtk_vcodec_mem_free(inst->ctx, mem);
>
>         mem->size = ((vsi->buf_w / 64) *
>                     (vsi->buf_h / 64) + 2) * 36 * 16;
> -
>         result = mtk_vcodec_mem_alloc(inst->ctx, mem);
>         if (result) {
>                 mem->size = 0;
> @@ -406,6 +410,24 @@ static bool vp9_alloc_work_buf(struct vdec_vp9_inst *inst)
>         vsi->mv_buf.pa = (unsigned long)mem->dma_addr;
>         vsi->mv_buf.sz = (unsigned int)mem->size;
>
> +
> +       mem = &inst->seg_id_buf;
> +       if (mem->va)
> +               mtk_vcodec_mem_free(inst->ctx, mem);
> +
> +       mem->size = VP9_SEG_ID_SZ;
> +       result = mtk_vcodec_mem_alloc(inst->ctx, mem);
> +       if (result) {
> +               mem->size = 0;
> +               mtk_vcodec_err(inst, "Cannot allocate seg_id_buf");
> +               return false;
> +       }
> +       /* Set the va again */
> +       vsi->seg_id_buf.va = (unsigned long)mem->va;
> +       vsi->seg_id_buf.pa = (unsigned long)mem->dma_addr;
> +       vsi->seg_id_buf.sz = (unsigned int)mem->size;
> +
> +
>         vp9_free_all_sf_ref_fb(inst);
>         vsi->sf_next_ref_fb_idx = vp9_get_sf_ref_fb(inst);
>
> @@ -653,6 +675,12 @@ static void vp9_reset(struct vdec_vp9_inst *inst)
>         inst->vsi->mv_buf.va = (unsigned long)inst->mv_buf.va;
>         inst->vsi->mv_buf.pa = (unsigned long)inst->mv_buf.dma_addr;
>         inst->vsi->mv_buf.sz = (unsigned long)inst->mv_buf.size;
> +
> +       /* Set the va again, since vpu_dec_reset will clear seg_id_buf in vpu */
> +       inst->vsi->seg_id_buf.va = (unsigned long)inst->seg_id_buf.va;
> +       inst->vsi->seg_id_buf.pa = (unsigned long)inst->seg_id_buf.dma_addr;
> +       inst->vsi->seg_id_buf.sz = (unsigned long)inst->seg_id_buf.size;
> +
>  }
>
>  static void init_all_fb_lists(struct vdec_vp9_inst *inst)
> @@ -752,6 +780,10 @@ static void vdec_vp9_deinit(unsigned long h_vdec)
>         if (mem->va)
>                 mtk_vcodec_mem_free(inst->ctx, mem);
>
> +       mem = &inst->seg_id_buf;
> +       if (mem->va)
> +               mtk_vcodec_mem_free(inst->ctx, mem);
> +
>         vp9_free_all_sf_ref_fb(inst);
>         vp9_free_inst(inst);
>  }
> @@ -848,6 +880,7 @@ static int vdec_vp9_decode(unsigned long h_vdec, struct mtk_vcodec_mem *bs,
>                                         vsi->sf_frm_sz[idx]);
>                         }
>                 }
> +               memset(inst->seg_id_buf.va, 0, inst->seg_id_buf.size);
>                 ret = vpu_dec_start(&inst->vpu, data, 3);
>                 if (ret) {
>                         mtk_vcodec_err(inst, "vpu_dec_start failed");
> --
> 1.9.1
>