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USB UAC1 on i.MX6SL EVK not detected by Windows 7

Question asked by Xuebing Wang on Aug 14, 2014
Latest reply on Jun 4, 2015 by Raana

Hi Community,


This is similar to

(UAC2 does not work on i.MX6SL EVK)


My environment is:

-- Hardware: iMX6SL EVK, connect EVK OTG port to Ubuntu 12.04 LTS USB Host

-- Software: Freescale's 3.10.17-1.0.0 Yocto BSP (branch imx-3.10.17-1.0.0_ga)

   -- repo init -u git:// -b imx-3.10.17-1.0.0_ga

-- How I build:

   -- Enable CONFIG_GADGET_UAC1, CONFIG_USB_AUDIO in "arch/arm/configs/imx_v7_defconfig"

   -- export MACHINE=imx6slevk; source setup-environment build

   -- bitbake fsl-image-test

-- Host PC is Ubuntu 12.04 LTS



Serial message from i.MX6SL EVK is:


root@imx6slevk:~# modprobe g_audio

g_audio gadget: Hardware params: access 3, format 2, channels 2, rate 48000

g_audio gadget: audio_buf_size 48000, req_buf_size 200, req_count 256

g_audio gadget: Linux USB Audio Gadget, version: Feb 2, 2012

g_audio gadget: g_audio ready

root@imx6slevk:~# g_audio gadget: high-speed config #1: Linux USB Audio Gadget

g_audio gadget: ep1out queue req: err = -22

g_audio gadget: ep1out queue req: err = -22



We have the same issue on Wandboard Solo, Wandboard Quad too.


Any suggestions? Did anyone get UAC1 work on any iMX6 platform?


Thank you very much.