[alsa-devel] Fwd: i.MX audio support

jwoodward jwoodward at tensor.co.uk
Wed Feb 26 10:38:06 CET 2014

-------- Original Message --------
Subject: 	i.MX audio support
Date: 	Wed, 26 Feb 2014 09:33:06 +0000
From: 	jwoodward <jwoodward at tensor.co.uk>
To: 	s.hauer at pengutronix.de

Hi Sascha,

I am having trouble implimenting the wm8731 codec with the i.MX21.

I have read your article https://lwn.net/Articles/363406/ which does not 
fill me with confidence on this.

It is at the stage of finding the i2c device, and setting up the 
transmit line for AC97, I am not very experienced with audio and would 
appreciate any advise possible?

Here are a few traces I have added:

[    2.935589] wm8731_i2c_probe: i2c_set_clientdata
[    2.989318] imx_ssi_init
[    2.997084] imx_ssi_probe
[    3.007482] imx_ssi_probe
[    3.015846] setup_channel_to_ac97
[    3.029115] imx-fiq-pcm-audio imx-fiq-pcm-audio.1: failed to claim 
fiq: -16
[    3.049930] imx-fiq-pcm-audio: probe of imx-fiq-pcm-audio.1 failed 
with error -16
[    3.075173] ALSA device list:
[    3.084401]   No soundcards found.

Attached is a schematic of our interface.

Many thanks,


__| __| __|   Jonathan Woodward
__| __| __|   Embedded Developer
__| __| __|   Tensor plc
jwoodward at tensor.co.uk
Tel: +44 (0)1480 215530 	http://www.tensor.co.uk
Fax: +44 (0)1480 223966 	
Important Email Information
The information in this email is confidential and may be legally privileged. It is intended solely for the addressee. Access to this email by anyone else is unauthorised. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and unlawful. If you are not the intended addressee please contact the sender and dispose of this email.
Any opinions expressed in this e-mail are those of the individual and not necessarily those of Tensor plc or any companies within the Tensor group. Any prices for the supply of goods or services are only valid if supported by a formal written quotation. This communication is for information only and shall not create or change any contractual relationship.
Every effort has been made to ensure that any attachment to this mail does not contain a virus. Whilst we have taken every reasonable precaution to minimise this risk, neither it nor the sender can accept liability for any damage which you sustain as a result of software viruses. You should carry out your own virus checks before opening the attachment.
Tensor plc, Hail Weston House, Hail Weston, St. Neots, Cambs, PE19 5JY, UK
Registered in England number 03670909 - VAT Number 761 546 815	

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D-T8540x^3-143-143-HDC308.pdf
Type: application/pdf
Size: 64668 bytes
Desc: not available
URL: <http://mailman.alsa-project.org/pipermail/alsa-devel/attachments/20140226/91f9b804/attachment-0001.pdf>

More information about the Alsa-devel mailing list