A311D平台audioloop调试问题

在VIM3最新android版本,预研调试内置loopback功能,数据pipeline为采集数据为TMD_C (D0 D1),4ch;loopback数据为TDM_B(D1)。tinycap 采集会卡死且采集不到数据

	aml-audio-card,dai-link@2 {
		mclk-fs = <256>;
		//continuous-clock;
		bitclock-master = <&loopback>;
		frame-master = <&loopback>;
		suffix-name = "alsaPORT-loopback";
		cpu {
			sound-dai = <&loopback>;
			system-clock-frequency = <12288000>;
		};
		codec {
			sound-dai = <&loopback_codec>;
		};
	};


loopback:loopback@0 {
	compatible = "amlogic, g12a-loopback";
	#sound-dai-cells = <0>;

	clocks = <
		&clkc CLKID_MPLL1
		&clkaudio CLKID_AUDIO_MCLK_B
		&clkc CLKID_MPLL2
		&clkaudio CLKID_AUDIO_MCLK_C>;
	clock-names =
		"tdmin_mpll",
		"tdmin_mclk",
		"tdminlb_mpll",
		"tdminlb_mclk";

	/* datain src
	 * 0: tdmin_a;
	 * 1: tdmin_b;
	 * 2: tdmin_c;
	 * 3: spdifin;
	 * 4: pdmin;
	 */
	datain_src = <1>;
	datain_chnum = <4>;
	datain_chmask = <0x0f>;
	/* config which data pin for loopback */
	datain-lane-mask-in = <1 1 0 0>;

	/* calc mclk for datalb */
	mclk-fs = <256>;

	/* tdmin_lb src
	 * 0: tdmoutA
	 * 1: tdmoutB
	 * 2: tdmoutC
	 * 3: PAD_TDMINA_DIN*, refer to core pinmux
	 * 4: PAD_TDMINB_DIN*, refer to core pinmux
	 * 5: PAD_TDMINC_DIN*, refer to core pinmux
	 * 6: PAD_TDMINA_D*, oe, refer to core pinmux
	 * 7: PAD_TDMINB_D*, oe, refer to core pinmux
	 */
	/* if tdmin_lb >= 3, use external loopback */
	datalb_src = <2>;
	datalb_chnum = <2>;
	datalb_chmask = <0x3>;
	/* config which data pin as loopback */
	datalb-lane-mask-in = <0 1 0 0>;

	status = "okay";
};