How to add kernel parameter?

[nguyentuan_k58h]

Hi experts,

I want to use the on-chip board Wifi QCA6174 of IMX8M Quad Evk Kit. I'm using yocto to build my distro fsl-imx-xwayland, kernel 4.9.88-2.0.0 (rocko)

Following release notes document "For i.MX 8MQuad, it needs to add kernel parameter
"pci=nomsi" to support Murata 1CQ Wi-Fi". But i didn't find the way to add it. 

Can you tell me how I can solve this problem and the steps for using the wlan chip QCA6174? Thank you.

Best regards,

[igorpadykov]

Hi Tuan

this is general linux parameter and one can try to use it in the same way as

described in Table 10. Common kernel boot parameters. QCA6174 is described in

sect.4.12 Wi-Fi QCA6174 Linux Manual in Linux 4.9.88_2.0.0 BSP & Multimedia Codecs Documentation

Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

[nguyentuan_k58h]

Hi igor,

I still can not figure out how to add kernel parameter.

I have try modprobe kernel.pci=nomsi but it did not work.

Btw, where is QCA6174 driver located in /lib/firmware/.

[igorpadykov · Accepted solution]

nomsi example:

https://community.nxp.com/message/1021557?commentID=1021557#comment-1021557 

Best regards
igor

[nguyentuan_k58h]

Hi igorpadykov‌

I've tried your solution in version L5.4.3_1.0.0 . It did not work. the interface wlp1s0 was not shown.

I've read release note of this version, there no guide to enable onchip wifi.

Can you tell me how to enable onchip wifi in version L5.4.3_1.0.0?

[igorpadykov]

Hi Tuan

one can try to follow sect.4.13.7 Configuring WLAN from User Space

Linux Manual included in Linux 5.4.3_1.0.0 Documentation

Best regards
igor

[nguyentuan_k58h]

Hi igorpadykov‌

Here is image which i flashed "https://www.nxp.com/webapp/Download?colCode=L5.4.3_1.0.0_MX8MQ&appType=license "

Actually, i've tried to procedure from "Reference manual" guide. 

When i run "wpa_supplicant -B -i wlp1s0 -c /etc/wpa_supplicant.conf -D nl80211"

Error show "Could not interface wlp1s0 flags: No such device" 

By the way, command "iw dev" show nothing when i hit.