Audio kernel header is not getting for external module build in i.MX6 Yocto Jethro

shabeerbadarudh — Fri, 07 Oct 2016 07:17:26 GMT

Hi,

I am upgrading the kernel from 3.10.17 to 4.1.15, as a part of these i upgraded yocto to Jethro. We have lot of custom drivers(i2c,spi, audio etc) and these drivers are build in yocto using external module build procedure. In Jethro, i am able to build all modules except audio driver. In the build time it shows a warning message but the .ko is created.

WARNING: "imx_audmux_v2_configure_port" [/home/shabeer/tata-build_4.1.15_last/tmp/work/lytxlcflex4115-poky-linux-gnueabi/lcflex-drivers/0.1-r0/home/shabeer/lytxrepo_4.1.15_snd/Flex-NewKernel-Collaboration/extra_src/lcflex-drivers/audio-mems/mems_audio.ko] undefined!

While inserting the driver shows below logs.
mems_audio: no symbol version for imx_audmux_v2_configure_port
mems_audio: Unknown symbol imx_audmux_v2_configure_port (err -22)

These drivers are build and loaded in previous yocto (Dizzy) without any issue. I believe it is a yocto related issue because the .ko are created and loaded successfully when we build the audio driver by put the source code inside the 4.1.15 kernel source (location - src/sound/soc/fsl). Also one difference i noticed, in Dizzy yocto the kernel headers are seen in the YOCTO location - tmp/sysroots/<MACHINE>/usr/src/kernel but not in Jethro.

Could any one help up to solve this?

Thanks,

Shabeer.

Re: Audio kernel header is not getting for external module build in i.MX6 Yocto Jethro

jimmychan — Wed, 12 Oct 2016 07:54:53 GMT

This may help.

https://community.nxp.com/message/631529

Re: Audio kernel header is not getting for external module build in i.MX6 Yocto Jethro

shabeerbadarudh — Fri, 14 Oct 2016 15:00:08 GMT

Below link helped me to resolve the issue!!

yocto - Using populate_sdk to include kernel headers - Stack Overflow

topic Audio kernel header is not getting for external module build in i.MX6 Yocto Jethro in i.MX Processors

Audio kernel header is not getting for external module build in i.MX6 Yocto Jethro

Re: Audio kernel header is not getting for external module build in i.MX6 Yocto Jethro

Re: Audio kernel header is not getting for external module build in i.MX6 Yocto Jethro