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Date: Tue, 21 Jun 2022 10:53:04 -0400
From: Nicolas Dufresne <nicolas@...fresne.ca>
To: "yunfei.dong@...iatek.com" <yunfei.dong@...iatek.com>,
Alexandre Courbot <acourbot@...omium.org>,
Hans Verkuil <hverkuil-cisco@...all.nl>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
Benjamin Gaignard <benjamin.gaignard@...labora.com>,
Tiffany Lin <tiffany.lin@...iatek.com>,
Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Tomasz Figa <tfiga@...gle.com>
Cc: George Sun <george.sun@...iatek.com>,
Xiaoyong Lu <xiaoyong.lu@...iatek.com>,
Hsin-Yi Wang <hsinyi@...omium.org>,
Fritz Koenig <frkoenig@...omium.org>,
Daniel Vetter <daniel@...ll.ch>,
dri-devel <dri-devel@...ts.freedesktop.org>,
Irui Wang <irui.wang@...iatek.com>,
Steve Cho <stevecho@...omium.org>, linux-media@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org,
Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH v4, 3/3] media: mediatek: vcodec: add h264 decoder
driver for mt8186
Le mercredi 15 juin 2022 à 19:33 +0800, yunfei.dong@...iatek.com a écrit :
> Hi Nicolas,
>
> Thanks for your comments.
> On Mon, 2022-06-13 at 16:08 -0400, Nicolas Dufresne wrote:
> > Le jeudi 12 mai 2022 à 11:46 +0800, Yunfei Dong a écrit :
> > > Add h264 decode driver to support mt8186. For the architecture
> > > is single core, need to add new interface to decode.
> > >
> > > Signed-off-by: Yunfei Dong <yunfei.dong@...iatek.com>
> > > ---
> > > .../vcodec/vdec/vdec_h264_req_multi_if.c | 177
> > > +++++++++++++++++-
> > > 1 file changed, 176 insertions(+), 1 deletion(-)
> > >
> > > diff --git
> > > a/drivers/media/platform/mediatek/vcodec/vdec/vdec_h264_req_multi_i
> > > f.c
> > > b/drivers/media/platform/mediatek/vcodec/vdec/vdec_h264_req_multi_i
> > > f.c
> > > index a96f203b5d54..1d9e753cf894 100644
> > > ---
> > > a/drivers/media/platform/mediatek/vcodec/vdec/vdec_h264_req_multi_i
> > > f.c
> > > +++
> > > b/drivers/media/platform/mediatek/vcodec/vdec/vdec_h264_req_multi_i
> > > f.c
> > > @@ -140,6 +140,9 @@ struct vdec_h264_slice_share_info {
> > > * @vsi: vsi used for lat
> > > * @vsi_core: vsi used for core
> > > *
> > > + * @vsi_ctx: Local VSI data for this decoding
> > > context
> > > + * @h264_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
> > > @@ -157,6 +160,9 @@ struct vdec_h264_slice_inst {
> > > struct vdec_h264_slice_vsi *vsi;
> > > struct vdec_h264_slice_vsi *vsi_core;
> > >
> > > + struct vdec_h264_slice_vsi vsi_ctx;
> > > + struct vdec_h264_slice_lat_dec_param h264_slice_param;
> > > +
> > > unsigned int resolution_changed;
> > > unsigned int realloc_mv_buf;
> > > unsigned int cap_num_planes;
> > > @@ -208,6 +214,61 @@ static int
> > > vdec_h264_slice_fill_decode_parameters(struct vdec_h264_slice_inst
> > > *i
> > > return 0;
> > > }
> > >
> > > +static int get_vdec_sig_decode_parameters(struct
> > > vdec_h264_slice_inst *inst)
> > > +{
> > > + const struct v4l2_ctrl_h264_decode_params *dec_params;
> > > + const struct v4l2_ctrl_h264_sps *sps;
> > > + const struct v4l2_ctrl_h264_pps *pps;
> > > + const struct v4l2_ctrl_h264_scaling_matrix *scaling_matrix;
> > > + struct vdec_h264_slice_lat_dec_param *slice_param = &inst-
> > > > h264_slice_param;
> > > + struct v4l2_h264_reflist_builder reflist_builder;
> > > + u8 *p0_reflist = slice_param->decode_params.ref_pic_list_p0;
> > > + u8 *b0_reflist = slice_param->decode_params.ref_pic_list_b0;
> > > + u8 *b1_reflist = slice_param->decode_params.ref_pic_list_b1;
> > > +
> > > + dec_params =
> > > + mtk_vdec_h264_get_ctrl_ptr(inst->ctx,
> > > V4L2_CID_STATELESS_H264_DECODE_PARAMS);
> > > + if (IS_ERR(dec_params))
> > > + return PTR_ERR(dec_params);
> > > +
> > > + sps = mtk_vdec_h264_get_ctrl_ptr(inst->ctx,
> > > V4L2_CID_STATELESS_H264_SPS);
> > > + if (IS_ERR(sps))
> > > + return PTR_ERR(sps);
> > > +
> > > + pps = mtk_vdec_h264_get_ctrl_ptr(inst->ctx,
> > > V4L2_CID_STATELESS_H264_PPS);
> > > + if (IS_ERR(pps))
> > > + return PTR_ERR(pps);
> > > +
> > > + scaling_matrix =
> > > + mtk_vdec_h264_get_ctrl_ptr(inst->ctx,
> > > V4L2_CID_STATELESS_H264_SCALING_MATRIX);
> > > + if (IS_ERR(scaling_matrix))
> > > + return PTR_ERR(scaling_matrix);
> > > +
> > > + mtk_vdec_h264_update_dpb(dec_params, inst->dpb);
> > > +
> > > + mtk_vdec_h264_copy_sps_params(&slice_param->sps, sps);
> > > + mtk_vdec_h264_copy_pps_params(&slice_param->pps, pps);
> > > + mtk_vdec_h264_copy_scaling_matrix(&slice_param->scaling_matrix,
> > > scaling_matrix);
> > > +
> > > + mtk_vdec_h264_copy_decode_params(&slice_param->decode_params,
> > > dec_params, inst->dpb);
> > > + mtk_vdec_h264_fill_dpb_info(inst->ctx, &slice_param-
> > > > decode_params,
> > > + slice_param->h264_dpb_info);
> > > +
> > > + /* Build the reference lists */
> > > + v4l2_h264_init_reflist_builder(&reflist_builder, dec_params,
> > > sps, inst->dpb);
> > > + v4l2_h264_build_p_ref_list(&reflist_builder, p0_reflist);
> > > +
> > > + v4l2_h264_build_b_ref_lists(&reflist_builder, b0_reflist,
> > > b1_reflist);
> > > + /* Adapt the built lists to the firmware's expectations */
> > > + mtk_vdec_h264_fixup_ref_list(p0_reflist,
> > > reflist_builder.num_valid);
> > > + mtk_vdec_h264_fixup_ref_list(b0_reflist,
> > > reflist_builder.num_valid);
> > > + mtk_vdec_h264_fixup_ref_list(b1_reflist,
> > > reflist_builder.num_valid);
> > > + memcpy(&inst->vsi_ctx.h264_slice_params, slice_param,
> > > + sizeof(inst->vsi_ctx.h264_slice_params));
> >
> > This function looks very redundant across multiple variants, could
> > you try and
> > make a helper to reduce the duplication ?
> >
> At first, I try to add one helper function for single core and lat
> decode.
>
> But these two hardware have big differences, need to add many condition
> to separate. So just add new function for mt8186 single core
> architecture.
I still think you could have a very small helper that turns the reflist_builder
incantation (which are fully identical in all SoC), to be one line/call. It was
annoying when I recently had to update this driver for some internal API change.
>
> Best Regards,
> Yunfei Dong
> > > +
> > > + return 0;
> > > +}
> > > +
> > > static void vdec_h264_slice_fill_decode_reflist(struct
> > > vdec_h264_slice_inst *inst,
> > > struct
> > > vdec_h264_slice_lat_dec_param *slice_param,
> > > struct
> > > vdec_h264_slice_share_info *share_info)
> > > @@ -596,6 +657,120 @@ static int vdec_h264_slice_lat_decode(void
> > > *h_vdec, struct mtk_vcodec_mem *bs,
> > > return err;
> > > }
> > >
> > > +static int vdec_h264_slice_single_decode(void *h_vdec, struct
> > > mtk_vcodec_mem *bs,
> > > + struct vdec_fb *unused, bool
> > > *res_chg)
> > > +{
> > > + struct vdec_h264_slice_inst *inst = h_vdec;
> > > + struct vdec_vpu_inst *vpu = &inst->vpu;
> > > + struct mtk_video_dec_buf *src_buf_info, *dst_buf_info;
> > > + struct vdec_fb *fb;
> > > + unsigned char *buf;
> > > + unsigned int data[2], i;
> > > + u64 y_fb_dma, c_fb_dma;
> > > + struct mtk_vcodec_mem *mem;
> > > + int err, nal_start_idx;
> > > +
> > > + /* bs NULL means flush decoder */
> > > + if (!bs)
> > > + return vpu_dec_reset(vpu);
> > > +
> > > + fb = inst->ctx->dev->vdec_pdata->get_cap_buffer(inst->ctx);
> > > + src_buf_info = container_of(bs, struct mtk_video_dec_buf,
> > > bs_buffer);
> > > + dst_buf_info = container_of(fb, struct mtk_video_dec_buf,
> > > frame_buffer);
> > > +
> > > + y_fb_dma = fb ? (u64)fb->base_y.dma_addr : 0;
> > > + c_fb_dma = fb ? (u64)fb->base_c.dma_addr : 0;
> > > + mtk_vcodec_debug(inst, "[h264-dec] [%d] y_dma=%llx c_dma=%llx",
> > > + inst->ctx->decoded_frame_cnt, y_fb_dma,
> > > c_fb_dma);
> > > +
> > > + inst->vsi_ctx.dec.bs_buf_addr = (u64)bs->dma_addr;
> > > + inst->vsi_ctx.dec.bs_buf_size = bs->size;
> > > + inst->vsi_ctx.dec.y_fb_dma = y_fb_dma;
> > > + inst->vsi_ctx.dec.c_fb_dma = c_fb_dma;
> > > + inst->vsi_ctx.dec.vdec_fb_va = (u64)(uintptr_t)fb;
> > > +
> > > + v4l2_m2m_buf_copy_metadata(&src_buf_info->m2m_buf.vb,
> > > + &dst_buf_info->m2m_buf.vb, true);
> > > + err = get_vdec_sig_decode_parameters(inst);
> > > + if (err)
> > > + goto err_free_fb_out;
> > > +
> > > + buf = (unsigned char *)bs->va;
> > > + nal_start_idx = mtk_vdec_h264_find_start_code(buf, bs->size);
> > > + if (nal_start_idx < 0) {
> > > + err = -EINVAL;
> > > + goto err_free_fb_out;
> > > + }
> > > + inst->vsi_ctx.dec.nal_info = buf[nal_start_idx];
> > > +
> > > + *res_chg = inst->resolution_changed;
> > > + if (inst->resolution_changed) {
> > > + mtk_vcodec_debug(inst, "- resolution changed -");
> > > + if (inst->realloc_mv_buf) {
> > > + err = vdec_h264_slice_alloc_mv_buf(inst, &inst-
> > > > ctx->picinfo);
> > > + inst->realloc_mv_buf = false;
> > > + if (err)
> > > + goto err_free_fb_out;
> > > + }
> > > + inst->resolution_changed = false;
> > > +
> > > + for (i = 0; i < H264_MAX_MV_NUM; i++) {
> > > + mem = &inst->mv_buf[i];
> > > + inst->vsi_ctx.mv_buf_dma[i] = mem->dma_addr;
> > > + }
> > > + }
> > > +
> > > + memcpy(inst->vpu.vsi, &inst->vsi_ctx, sizeof(inst->vsi_ctx));
> > > + err = vpu_dec_start(vpu, data, 2);
> > > + if (err)
> > > + goto err_free_fb_out;
> > > +
> > > + /* wait decoder done interrupt */
> > > + err = mtk_vcodec_wait_for_done_ctx(inst->ctx,
> > > MTK_INST_IRQ_RECEIVED,
> > > + WAIT_INTR_TIMEOUT_MS,
> > > MTK_VDEC_CORE);
> > > + if (err)
> > > + mtk_vcodec_err(inst, "decode timeout: pic_%d",
> > > + inst->ctx->decoded_frame_cnt);
> > > +
> > > + inst->vsi->dec.timeout = !!err;
> > > + err = vpu_dec_end(vpu);
> > > + if (err)
> > > + goto err_free_fb_out;
> > > +
> > > + memcpy(&inst->vsi_ctx, inst->vpu.vsi, sizeof(inst->vsi_ctx));
> > > + mtk_vcodec_debug(inst, "pic[%d] crc: 0x%x 0x%x 0x%x 0x%x 0x%x
> > > 0x%x 0x%x 0x%x",
> > > + inst->ctx->decoded_frame_cnt,
> > > + inst->vsi_ctx.dec.crc[0], inst-
> > > > vsi_ctx.dec.crc[1],
> > > + inst->vsi_ctx.dec.crc[2], inst-
> > > > vsi_ctx.dec.crc[3],
> > > + inst->vsi_ctx.dec.crc[4], inst-
> > > > vsi_ctx.dec.crc[5],
> > > + inst->vsi_ctx.dec.crc[6], inst-
> > > > vsi_ctx.dec.crc[7]);
> > > +
> > > + inst->ctx->decoded_frame_cnt++;
> > > + return 0;
> > > +
> > > +err_free_fb_out:
> > > + mtk_vcodec_err(inst, "dec frame number: %d err: %d",
> > > + inst->ctx->decoded_frame_cnt, err);
> > > + return err;
> > > +}
> > > +
> > > +static int vdec_h264_slice_decode(void *h_vdec, struct
> > > mtk_vcodec_mem *bs,
> > > + struct vdec_fb *unused, bool
> > > *res_chg)
> > > +{
> > > + struct vdec_h264_slice_inst *inst = h_vdec;
> > > + int ret;
> > > +
> > > + if (!h_vdec)
> > > + return -EINVAL;
> > > +
> > > + if (inst->ctx->dev->vdec_pdata->hw_arch ==
> > > MTK_VDEC_PURE_SINGLE_CORE)
> > > + ret = vdec_h264_slice_single_decode(h_vdec, bs, unused,
> > > res_chg);
> > > + else
> > > + ret = vdec_h264_slice_lat_decode(h_vdec, bs, unused,
> > > res_chg);
> > > +
> > > + return ret;
> > > +}
> > > +
> > > static int vdec_h264_slice_get_param(void *h_vdec, enum
> > > vdec_get_param_type type,
> > > void *out)
> > > {
> > > @@ -620,7 +795,7 @@ static int vdec_h264_slice_get_param(void
> > > *h_vdec, enum vdec_get_param_type type
> > >
> > > const struct vdec_common_if vdec_h264_slice_multi_if = {
> > > .init = vdec_h264_slice_init,
> > > - .decode = vdec_h264_slice_lat_decode,
> > > + .decode = vdec_h264_slice_decode,
> > > .get_param = vdec_h264_slice_get_param,
> > > .deinit = vdec_h264_slice_deinit,
> > > };
> >
> >
>
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