Linux/TAS2552SW-LINUX: How to use ALSA System on Chip (ASoC)

user5129649

Prodigy 60 points

Part Number: TAS2552SW-LINUX
Other Parts Discussed in Thread: TAS2552

Tool/software: Linux

We want to use TAS2552 Amplifier and Converter with an ARM based embedded Linux.

However, after configuring DTS there is a ALSA Souncard, but aplay gives an error:

aplay: set_params:1305: Channels count non available

We configured two Items in DTS:

       tas2552_sound: tas2552-sound {
                status = "okay";
                compatible = "simple-audio-card";
                model = "ti-tas2550";

                audio-routing =
                        "Ext Spk", "OUT" ,
                        "Int Mic", "IN";
                simple-audio-card,format = "i2s";
                simple-audio-card,name = "P5tas2552";
                simple-audio-card,cpu {
                        sound-dai = <&i2s0>;
                };
                simple-audio-card,codec {
                        sound-dai = <&tas2552>;
                };
        };

&i2c2 {
status = "okay";
clock-frequency = <400000>;

        tas2552: tas2552@40 {
                compatible = "ti,tas2552";
                reg = <0x40>;
                #sound-dai-cells = <0>;
                vbat-supply = <&vdda_codec>;
                iovdd-supply = <&vccadc_ref>;
                avdd-supply= <&vccadc_ref>;
        };
};

This is an excerpt of messages during boot of the Board:

...
[    0.189809] Advanced Linux Sound Architecture Driver Initialized.
...
[    4.876924] asoc-simple-card hdmi-codec: i2s-hifi <-> ff8a0000.i2s mapping ok
[    4.888926] asoc-simple-card tas2552-sound: tas2552-amplifier <-> ff880000.i2s mapping ok
...
[    5.131152] ALSA device list:
[    5.139035]   #0: HDMI-CODEC
[    5.146635]   #1: P5tas2552

[ OK ] Reached target Sound Card.

To use TAS2552 as default, I created /etc/asound.conf:

# cat /etc/asound.conf
pcm.!default {
type hw
card 1
}

ctl.!default {
type hw
card 1
}

Accessing with Alsa-Tools:

# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: HDMICODEC [HDMI-CODEC], device 0: ff8a0000.i2s-i2s-hifi i2s-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: P5tas2552 [P5tas2552], device 0: ff880000.i2s-tas2552-amplifier tas2552-amplifier-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
# # aplay -L
null
    Discard all samples (playback) or generate zero samples (capture)
sysdefault:CARD=HDMICODEC
    HDMI-CODEC,
    Default Audio Device
sysdefault:CARD=P5tas2552
    P5tas2552,
    Default Audio Device
# amixer set 'Speaker Driver' 100%
Simple mixer control 'Speaker Driver',0
Capabilities: pvolume pvolume-joined
Playback channels: Mono
Limits: Playback 0 - 31
Mono: Playback 31 [100%] [24.00dB]
# amixer set 'Input selection' "Digital"
Simple mixer control 'Input selection',0
Capabilities: enum
Items: 'Digital' 'Analog'
Item0: 'Digital'
# aplay -v -c 1 -t raw /usr/share/sounds/alsa/Noise.wav
Playing WAVE '/usr/share/sounds/alsa/Noise.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
aplay: set_params:1305: Channels count non available

Any hints will be greatly appreciated.

over 7 years ago

0 Pavel Botev over 7 years ago

TI__Guru**** 170625 points

Hi user5129649,

On which TI device exactly you are running the embedded Linux?

Regards,
Pavel

0 user5129649 over 7 years ago in reply to Pavel Botev

Prodigy 60 points

Hallo!

The Linux is running on another CPU (RK3399 - sorry), but the ASoC is working with HDMI.

We think TI TAS2552 can be driven by any SoC which has I2S and I2C interfaces.

We create the rootfs with buildroot, the kernel is also compiled by us.

The following exerpt of DTS sounds on HDMI. This is why I ASoC should be working with RK3399.

        dw_hdmi_audio: dw-hdmi-audio {
                status = "enabled";
                compatible = "rockchip,dw-hdmi-audio";
                #sound-dai-cells = <0>;
        };

        hdmi_codec: hdmi-codec {
                compatible = "simple-audio-card";
                simple-audio-card,format = "i2s";
                simple-audio-card,mclk-fs = <256>;
                simple-audio-card,name = "HDMI-CODEC";

                simple-audio-card,cpu {
                        sound-dai = <&i2s2>;
                };

                simple-audio-card,codec {
                        sound-dai = <&hdmi>;
                };
        };

        hdmi_sound: hdmi-sound {
                status = "disabled";
                compatible = "simple-audio-card";
                simple-audio-card,format = "i2s";
                simple-audio-card,mclk-fs = <256>;
                simple-audio-card,name = "rockchip,hdmi";

                simple-audio-card,cpu {
                        sound-dai = <&i2s2>;
                };
                simple-audio-card,codec {
                        sound-dai = <&hdmi>;
                };
        };

With best regards,

Klaus

0 Pavel Botev over 7 years ago in reply to user5129649

TI__Guru**** 170625 points

Klaus,

This question seems specific for TAS2552 Amplifier. I would suggest you to ask/post in the Audio Amplifiers forum:

e2e.ti.com/.../6

Regards,
Pavel

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Linux/TAS2552SW-LINUX: How to use ALSA System on Chip (ASoC)