Problem with spectral scan in VHT80 mode

[Gaurang Ramesh Naik]

Hello,

I was trying the ath10k's spectral scan. I used the following commands
given on the link
https://wireless.wiki.kernel.org/en/users/drivers/ath10k/spectral

echo 8 > /sys/kernel/debug/ieee80211/phy0/ath10k/spectral_count
echo manual > /sys/kernel/debug/ieee80211/phy0/ath10k/spectral_scan_ctl
echo trigger > /sys/kernel/debug/ieee80211/phy0/ath10k/spectral_scan_ctl
cat /sys/kernel/debug/ieee80211/phy0/ath10k/spectral_scan0 >> /tmp/fft.dump

I am using OpenWrt Bleeding edge. In the HT20 and HT40 mode, I
correctly get 8 samples. However, in the VHT80 mode, the /tmp/fft.dump
file generated is empty.

In the open issues on the above link, it said that the HT40 and HT20
modes ignore the count parameter. That isn't the case for me. I seem
to get correct # of samples (I view the dump file using
https://github.com/simonwunderlich/FFT_eval). However, in the VHT80
mode, there seems to be no output. Am I doing something wrong here?

Thanks,
Gaurang.