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Sender: Larry Finger <larry.finger@gmail.com>
Message-ID: <91f3ecc2-7ae4-b17d-acda-f3f7e4b48f6f@lwfinger.net>
Date:   Tue, 13 Jun 2023 13:29:11 -0500
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Subject: Re: Linux mainline support for RTL8811AU/RTL8821AU
To:     petter@technux.se, linux-wireless@vger.kernel.org
Cc:     pkshih@realtek.com, morrownr@gmail.com, kernel@pengutronix.de,
        kvalo@kernel.org, linux@ulli-kroll.de, petter.mabacker@esab.se,
        s.hauer@pengutronix.de
References: <20230613080907.328548-1-petter@technux.se>
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From:   Larry Finger <Larry.Finger@lwfinger.net>
In-Reply-To: <20230613080907.328548-1-petter@technux.se>
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On 6/13/23 03:09, petter@technux.se wrote:
> Hi,
> 
> I'm investigating a wifi dongle (LM808) that is based on the RTL8811AU chipset.
> 
> $ lsusb
> ..
> Bus 003 Device 066: ID 0bda:a811 Realtek Semiconductor Corp. RTL8811AU 802.11a/b/g/n/ac WLAN Adapter
> ..
> 
> I cannot find any driver support in mainline for that chipset (8811cu/8821cu, seems to exists). Just curious if anyone knows if there are any ongoing efforts to get this driver included in mainline?
> 
> I can see that both:
> 
> https://www.lm-technologies.com/product/wifi-usb-adapter-433mbps-lm808/?template=driver
> 
> and
> 
> https://github.com/morrownr/8821au-20210708
> 
> exists for non-mainline support, so will play a bit with them. But for maintenance etc I'm interested to learn about possible mainline efforts within this area.

It seems that the RTW8821AE has never been built or released. If it had been, 
then extending that driver to the 8821AU would be easy as there would be a file 
rtw8821a.c that contained all the details of that chip. Without that, there is 
little that anyone outside Realtek can do. The vendor driver, which is the one 
in the link you posted, will likely work.

Larry