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Message-ID: <8c31c09f-68c1-42a8-1db9-1ea98caf8d05@oss.schwarz.eu>
Date:   Thu, 29 Dec 2022 10:26:46 +0100
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Subject: Re: rtw_8821cu: "rfe 38 isn't supported" with Linux 6.2rc1
 (0bda:c811)
To:     Ping-Ke Shih <pkshih@realtek.com>,
        "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
References: <a949dfb1-51e9-8f91-bef1-674c78101cc3@oss.schwarz.eu>
 <79ce633c3e274cffb22349b12566d78a@realtek.com>
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From:   Felix Schwarz <felix.schwarz@oss.schwarz.eu>
In-Reply-To: <79ce633c3e274cffb22349b12566d78a@realtek.com>
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Hi Ping-Ke,

Am 29.12.22 um 01:26 schrieb Ping-Ke Shih:
> RFE type 38 is very similar to type 6, so I suggest to try this:
> 
> diff --git a/rtw8821c.c b/rtw8821c.c
> index dd01b22f..9ac83756 100644
> --- a/rtw8821c.c
> +++ b/rtw8821c.c
> @@ -1547,6 +1547,7 @@ static const struct rtw_rfe_def rtw8821c_rfe_defs[] = {
>          [4] = RTW_DEF_RFE_EXT(8821c, 0, 0, 2),
>          [6] = RTW_DEF_RFE(8821c, 0, 0),
>          [34] = RTW_DEF_RFE(8821c, 0, 0),
> +       [38] = RTW_DEF_RFE(8821c, 0, 0),
>   };

That seems to help. The errors I posted initially are all gone.

Now I see a wifi card in network manager and scanning for wifi networks works as 
well. Connection to my wireless network does not work though (neither 2.4 Ghz 
nor 5) - no real errors just endless spinning after I entered my password. 
(Though running any application is *extremly* slow without an obvious cause when 
running 6.2rc1, maybe a different bug?)

I should probably debug this without gnome + networkmanager but maybe you have 
an idea based on these errors?

rtw_8821cu 1-4:1.0: read register 0x5 failed with -110
rtw_8821cu 1-4:1.0: read register 0x20 failed with -110
rtw_8821cu 1-4:1.0: read register 0x7c failed with -110
rtw_8821cu 1-4:1.0: read register 0x1080 failed with -110
rtw_8821cu 1-4:1.0: write register 0x3 failed with -110


I attached the logs produced once I attach the USB device running Linux 6.2rc1 
with the additional patch for rfe 38.

Felix