TAS2563: Unable to capture Echo reference data

Hello, 

Our team is looking into this thread and will respond as soon as possible. 

Best Regards, 

Justin Beigel

Hi Sri,

I think the commands you're using to get the correct recording data is OK.

By default you should get Echo reference on one channel, and Digital loopback on the other channel. If you need them in the reverse order that can also be modified on the bin/header file from End System Integration panel.

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

Hi Ivan,

Unknown said:

By default you should get Echo reference on one channel, and Digital loopback on the other channel.

What do you mean "default" here? Is it channels = 1 or we should remove "channels" configuration completely? And when you say "Echo reference on one channel" , could you please specify left or right channel?

As I mentioned earlier, when we did "channels = 2" , we are getting the data in the left channel. Is this is the correct behaviour?

Thanks

Hi Ivan,

We see that there is regression with this patch.

Issue is "Remove and insert USB, it is not detecting". Basically from log if we see, disconnection of USB is not completely happening. After disconnection, we see USB detection event, even if the USB is not inserted.

Could you please let us know how this change can impact on USB detecion?

Hi Sri,

Unfortunately I don't have knowledge on how the configuration of the amp can affect the USB interface. I would not expect this.
Perhaps there are some other changes between the two versions?

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

Hi Ivan,

We have double confirmed that, if we revert only our change (changing the channels to 2 in tas2563 node), USB issue is not seen

-Sri

Hi Sri,

I can check with our software team, but still not sure how this could be related to USB connection.

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

Hi Ivan,

Any update on this issue?

We also would like to know other than "channels" change in dtsi, is there a way to get the data in left channel?

We have to capture the data in left channel only for echo-reference to work. Please let us know any other approach to get capture the data in left channel.

Regards,

Divya

Hi Ivan,

Any update on this issue?

This is critical issue for us. We see regression when we set the channels to 2 .

Could you please let us know if there is any other way to capture the echo reference data on left channel?

Could you please help prioritise this?

Regards,

Divya

Hi Ivan,

We further debugged this issue and found that changing the "channel" config of tas2563 in dti file causing i2c errors.

07-02 07:29:50.189 0 0 E i2c_geni 4a84000.i2c: i2c error :-107, slave addr:0x0, len:2, flags:0x0
07-02 07:29:50.218 0 0 E tas2563 0-004c: tas2563_change_book_page, ERROR, L=232, E=-2

So clearly see  channel changes are causing regression issue.

We have below configuration in our dts file.

104 &qupv3_se1_i2c {
105 	status = "okay";
106 	tas2563:tas2563@4c {
107 		#sound-dai-cells = <0>;
108 		compatible = "ti,tas2563";
109 		reg = <0x4c>;
110 		ti,left-channel = <0x4c>;
111 		ti,channels = <1>; /* channel number */
112 		ti,asi-format = <0>; /* 0, i2S; 1, DSP;  */
113 		ti,reset-gpio = <&pmi632_gpios 4 0>;
114 		ti,irq-gpio = <&tlmm 83 0>;
115 		vdd-supply = <&L9A>; //vddio, 1.8v
116 		ti,left-slot = <0>; /* <left slot number> */
117 		ti,right-slot = <4>; /* <right slot number> */
118 		ti,echo-ref = <2>;
119 		ti,i2s-bits = <16>;
120 		ti,imon-slot-no = <0>; /* <current sense slot number> */
121 		ti,vmon-slot-no = <2>; /* <current voltage slot number> */
122 		status = "ok";

With this, when we do stereo recording, only right channel is capturing the data. Please refer attached image


But for echo cancellation, DSP always reads the data from left channel to cancel the echo.
Since we don't have the data in left channel, echo cancellation is failing. 

Our requirement is, we have configured mono tas2563 speaker and we want to capture echo reference data from left channel.
How do we achieve this?

Please prioritise this issue
 
Regards,
Divya

Hi Ivan, appreciate your help here.