No sound after installing drivers

[redchenjs]

No sound after installing drivers

[redchenjs]

Hi @kmickz , can you provide the image file you are using? Not all audio formats are supported by the driver.

[redchenjs]

Have you tried playing stereo audio?

[kmickz]

can you provide me supported audio file link

[kmickz]

hey @redchenjs i tried all formats but still there is no sound please can you suggest me what i am doing wrong also tried both mono and stereo audio but still make no difference

root@OpenWrt:~# aplay -vv pcm1608s.wav
Playing WAVE 'pcm1608s.wav' : Signed 16 bit Little Endian, Rate 8000 Hz, Stereo
Plug PCM: Hardware PCM card 0 'MT762X WM8960 ASoC Card' device 0 subdevice 0
Its setup is:
stream : PLAYBACK
access : RW_INTERLEAVED
format : S16_LE
subformat : STD
channels : 2
rate : 8000
exact rate : 8000 (8000/1)
msbits : 16
buffer_size : 4096
period_size : 1024
period_time : 128000
tstamp_mode : NONE
tstamp_type : MONOTONIC
period_step : 1
avail_min : 1024
period_event : 0
start_threshold : 4096
stop_threshold : 4096
silence_threshold: 0
silence_size : 0
boundary : 1073741824
appl_ptr : 0
hw_ptr : 0
#+ | 00%

[redchenjs]

Hi @kmickz, have you checked the REFCLK pin of the WM8960 and the device tree file you used? Maybe we can take a look at the schematic for the audio part.

[kmickz]

@redchenjs , yes i check REFCLK pin it continuously generating 12Mhz clock(cross-check with CRO) here is my dts file configuration
for better understating of problem

#include "mt7628an.dtsi"

#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/input/input.h>

/ {
compatible = "mediatek,mt7628an-eval-board", "mediatek,mt7628an-soc";
model = "Mediatek MT7628AN evaluation board";

};

&state_default {
gpio {
groups = "gpio";
function = "gpio";
};

refclk {
	groups = "refclk";
	function = "refclk";
};


i2s {
	groups = "i2s";
	function = "i2s";
};

};

&wmac {
status = "okay";
};

&spi0 {
status = "okay";

flash@0 {
	compatible = "jedec,spi-nor";
	reg = <0>;
	spi-max-frequency = <10000000>;

	partitions {
		compatible = "fixed-partitions";
		#address-cells = <1>;
		#size-cells = <1>;

		partition@0 {
			label = "u-boot";
			reg = <0x0 0x30000>;
			read-only;
		};

		partition@30000 {
			label = "u-boot-env";
			reg = <0x30000 0x10000>;
			read-only;
		};

		factory: partition@40000 {
			label = "factory";
			reg = <0x40000 0x10000>;
			read-only;
		};

		partition@50000 {
			compatible = "denx,uimage";
			label = "firmware";
			reg = <0x50000 0x7b0000>;
		};
	};
};

};

&i2c {
status = "okay";

codec: wm8960@1a {
	compatible = "wlf,wm8960";
	reg = <0x1a>;
	wlf,shared-lrclk;
};

};

&i2s {
status = "okay";
};

&gdma {
status = "okay";
};

/ {
sound {
compatible = "mediatek,mt762x-wm8960-machine";
mediatek,platform = <&i2s>;
mediatek,audio-codec = <&codec>;
audio-routing =
"Headphone", "HP_L",
"Headphone", "HP_R",
"Ext Spk", "SPK_LN",
"Ext Spk", "SPK_LP",
"Ext Spk", "SPK_RN",
"Ext Spk", "SPK_RP",
"Mic", "MICB",
"LINPUT1", "Mic",
"LINPUT2", "Line In",
"RINPUT2", "Line In";
};
};

[kmickz]

following is circuit i am using

[redchenjs]

@kmickz The refclk in the dts file is not needed, the board has an external crystal oscillator for WM8960.

[kmickz]

@redchenjs removing refclk from dts file make no difference

[redchenjs]

@kmickz I use the LinkIt Smart 7688 board with Breakout for LinkIt Smart 7688 v2.0. The WM8960 configuration is almost the same, except for the audio input part. Breakout_for_LinkIt_Smart_7688_v2.0_schematic_files.zip

I tested the wav file and mp3 file using the following commands: test.wav.zip test.mp3.zip

WAV file:
aplay /tmp/test.wav

MP3 file:
madplay /tmp/test.mp3

The playback is fine, and the capture works as well:

arecord -f cd | aplay

My build environment is as follows:

OpenWrt 21.02-SNAPSHOT, r16827-23ad680a345 Kernel 5.4.231
Driver source: https://github.com/redchenjs/mt762x-wm8960/tree/linux-5.4
DTS file: https://github.com/redchenjs/mt762x-wm8960/blob/linux-5.4/examples/mt7628an_mediatek_linkit-smart-7688.dts

[kmickz]

hii @redchenjs i was trying to fix this problem can not find solution yet can you please provide me some details regarding your linux 5.4.231

it looks like my DAC is in off state here is some logs which i get

root@OpenWrt:/sys/kernel/debug/asoc/MT762X WM8960 ASoC Card/wm8960.0-001a/dapm# cat Left\ DAC Left DAC: Off in 0 out 4 - R26(0x1a) mask 0x100 stream Playback inactive out "PCM Playback Switch" "Left Output Mixer" in "static" "Playback"