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Re: rtl8822cs, mainline 6.16-rc7: kernel reports ' unsupported rf path'

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> Wiadomość napisana przez Ping-Ke Shih <pkshih@xxxxxxxxxxx> w dniu 23 lip 2025, o godz. 02:52:
> 
> Piotr Oniszczuk <piotr.oniszczuk@xxxxxxxxx> wrote:
> 
> [...]
> 
>> 
>> Working: HT RX MCS indexes: 0-15
>> Non-working: HT RX MCS indexes: 0-7
>> 
>> Isn’t that 8-15 are for 2x2mimo?
>> So maybe - by some reason - hw sometimes reports support for only 1x mimo but receives from air 2x mimo
>> (2 streams) and thats why I see hell of "unsupported rf path"  errors from driver?
> 
> I think your point is correct that firmware reports incorrect value somehow. 
> With below changes, we can check this:
> 
> diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c
> index fa0ed39cb199..3363458a9ea1 100644
> --- a/drivers/net/wireless/realtek/rtw88/main.c
> +++ b/drivers/net/wireless/realtek/rtw88/main.


…….


pls find dmesg from:

non-working state: https://termbin.com/8x42
working state: https://termbin.com/b804

ps: a added rtw88 pref to printk’s to easier spot it’s otputs…








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