LS1021A Audio Issue

brillyckuriakos — Mon, 04 Jan 2016 09:32:08 GMT

Hi,

We are facing issues while testing audio in the LS1021aiot reference board.The audio record as well as audio playback is not working for us.

Test Environment Info

Reference Board : LS1021A-IOT

SDK Version : 1.8
CPU: Freescale LayerScape LS1021E, Version: 1.0, (0x87081110)
Clock Configuration:CPU0(ARMV7):1000 MHz, Bus:300 MHz, DDR:800 MHz (1600 MT/s data rate)

Build Image : fsl-image-fsl-image-minimal + alsa utils

Issue

As per the schematics, the audio in interface is

Audio line in -------->sgtl5000------>SAI2 rx

and the audio out connections are like,

SAI2 tx------> sgtl5000-----> Audio line out

By default, the audio codec is set as the master and we could observe the Bit clock as well as frame sync while probing the signals CODEC2_CLK and CODEC2_FS.

From the board console,

# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: FSLVF610TWRBOAR [FSL-VF610-TWR-BOARD], device 0: HiFi sgtl5000-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0

# arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: FSLVF610TWRBOAR [FSL-VF610-TWR-BOARD], device 0: HiFi sgtl5000-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0

# aplay test.wav
Playing WAVE 'test.wav' :Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
playback write error (DMA or IRQ trouble?)
aplay: pcm_write:1939:write error: Input/output error

[1]+ Done(1) test.wav

#

While doing playback and probing the signal CODEC2_TXD, we couldnt find any data signal.

We have tested the audio record also, But except the header no audio data is being recorded and the record file size remains 44 bytes always.

(Note : For testing the arecord, We have tried mounting the R2 and R505)

Re: LS1021A Audio Issue

yipingwang — Wed, 06 Jan 2016 11:25:25 GMT

Hello Brilly C Kuriakose,

According to your log, it looks that RCW and SAI audio driver are configured correctly.

Would you please send your Kernel configuration file and dts file to me to do more investigation?

Have a great day,
Yiping

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Re: LS1021A Audio Issue

brillyckuriakos — Wed, 06 Jan 2016 12:56:47 GMT

Hello Yiping,

Thanks for your response..

Attached is the dts, dtsi file and the kernel config files.

Thanks & Regards,

Brilly

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