[PATCH v2, 3/3] media: mediatek: vcodec: add h264 decoder driver for mt8186

[Yunfei Dong]

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@xxxxxxxxxxxx>
---
 .../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_if.c b/drivers/media/platform/mediatek/vcodec/vdec/vdec_h264_req_multi_if.c
index 757443dbbbf5..e199620b076d 100644
--- a/drivers/media/platform/mediatek/vcodec/vdec/vdec_h264_req_multi_if.c
+++ b/drivers/media/platform/mediatek/vcodec/vdec/vdec_h264_req_multi_if.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));
+
+	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 nal_start_idx, data[2], i;
+	u64 y_fb_dma, c_fb_dma;
+	struct mtk_vcodec_mem *mem;
+	int err;
+
+	/* 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, "+ [%d] FB y_dma=%llx c_dma=%llx va=0x%llx",
+			 inst->ctx->decoded_frame_cnt, y_fb_dma, c_fb_dma, (u64)fb);
+
+	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_toio(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_fromio(&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,
 };
-- 
2.18.0