i.MX Processors中的主题 SPDIF OUT issue

SPDIF OUT issue

weikeng-jimmy — Tue, 10 Mar 2015 05:59:26 GMT

Hi Sir,

We tested SPDIF OUT via TOSLINK SPDIF connector on i.MX6SDP board. (GPIO_17)

We measure i.MX6 SPDIF OUT pads have waveforms to work (red light is bright at TOSLINK SPDIF connector)

But it is not sound by headphone on LINDY SPDIF hardware.

LINDY spdif transform box information:

support freqence : 32 ~ 192KHz

support format : spdif, 24bit 2CH LPCM

input interface : TOSLINK

Below are test command :

aplay -D plughw:1,0 -N -M naim-test-2-wav-24-96000.wav

Playing WAVE 'naim-test-2-wav-24-96000.wav' : Signed 24 bit Little Endian in 3bytes, Rate 96000 Hz, Stereo

aplay -D plughw:1,0 -N -M big_441_24bit_2.wav

Playing WAVE 'big_441_24bit_2.wav' : Signed 24 bit Little Endian in 3bytes, Rate 44100 Hz, Stereo

root@freescale /wav$ aplay -l

**** List of PLAYBACK Hardware Devices ****

card 0: wm8962audio [wm8962-audio], device 0: HiFi wm8962-0 []

Subdevices: 1/1

Subdevice #0: subdevice #0

card 1: imxspdif [imx-spdif], device 0: IMX SPDIF mxc-spdif-0 []

Subdevices: 1/1

Subdevice #0: subdevice #0

Re: SPDIF OUT issue

igorpadykov — Sat, 14 Mar 2015 00:12:52 GMT

Hi JIMMY

you could try other test method with i.MX 6Series Platform SDK

or just with another spdif device.

Best regards

igor

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Re: SPDIF OUT issue

张三123 — Wed, 23 Sep 2015 03:04:49 GMT

hello,did you solved this issue ? i encounter this problem also，can you share me how to fix it。

thanks！！

Re: SPDIF OUT issue

richardhu — Tue, 20 Oct 2015 10:15:30 GMT

I have the similar issue.

I use freescale linux kernel - imx_3.14.38_6qp_beta.

I bought three different model of optical to R/L audio Converter box.

1. Uptech AC100 optical to R/L audio Converter

2. CYP DCT-3 optical to R/L audio Converter

3. Upmost DCT-3 plus optical to R/L audio Converter

All these three box can work with my Asus motherboard SPDIF output.

So, we can exclude this is device issue.

Only "CYP DCT-3 optical to R/L audio Converter" can work with i.mx6 board, the others just output no sound.

I suspect there is compatibility issue on freescale spdif driver.