Failing to load wcn36xx firmware on db410c with mainline

[Riku Voipio]

Hi,

I'm triying wifi on Dragonboard 410c with mainline 4.10-rc3 + wcn36xxx
patches from: https://git.kernel.org/cgit/linux/kernel/git/kvalo/ath.git/log/?h=pending

For device tree, the following was applied:
https://patches.linaro.org/patch/83059/

Mainline:

[    7.858517] a204000.wcnss supply vddcx not found, using dummy regulator
[    7.868858] remoteproc remoteproc0: a204000.wcnss is available
[    7.872690] remoteproc remoteproc0: powering up a204000.wcnss
[    7.874077] remoteproc remoteproc0: Booting fw image wcnss.mdt, size 7260
[    7.882642] remoteproc remoteproc0: invalid firmware metadata
[    7.886649] remoteproc remoteproc0: Failed to load program segments: 130

often at this point I get kernel crash (but not always)

On the v4.4 based linaro 1606 kernel same firmware loads and wifi starts:

[    5.287057] a204000.wcnss supply vddcx not found, using dummy regulator
[    5.377162]  remoteproc2: a204000.wcnss is available
[    5.393207]  remoteproc2: Direct firmware load for wcnss.mdt failed
with error -2
[   13.371513]  remoteproc2: powering up a204000.wcnss
[   13.378893]  remoteproc2: Booting fw image wcnss.mdt, size 7260
[   13.879141]  remoteproc2: remote processor a204000.wcnss is now up
[   13.998793] qcom_wcnss_ctrl pronto.wcnss: WCNSS Version 1.5 1.2
[   16.042096] wcn36xx: firmware WLAN version 'WCN v2.0 RadioPhy
vRhea_GF_1.12 with 19.2MHz XO' and CRM version
'CNSS-PR-2-0-1-2-c1-00010'
[   16.042132] wcn36xx: firmware API 1.5.1.2, 41 stations, 2 bssids

Any hints would be appreciated.

Riku