RE: No support for Realtek 8821CE RFE Type 6

[Pkshih <pkshih@realtek.com>]

Hi Bogdan,

Thanks for your information. 
Since we don't have this module, I'll have internal discussion further.

I have a quick look of RFE type 0, 2, 4 and 6. I think type 0 and 6
are similar. So, could you try following patch to see if it works?

diff --git a/rtw8821c.c b/rtw8821c.c
index 80a6f4da..1b86a21b 100644
--- a/rtw8821c.c
+++ b/rtw8821c.c
@@ -1513,6 +1513,7 @@ static const struct rtw_rfe_def rtw8821c_rfe_defs[] = {
        [0] = RTW_DEF_RFE(8821c, 0, 0),
        [2] = RTW_DEF_RFE_EXT(8821c, 0, 0, 2),
        [4] = RTW_DEF_RFE_EXT(8821c, 0, 0, 2),
+       [6] = RTW_DEF_RFE(8821c, 0, 0),
 };

--
Ping-Ke

> -----Original Message-----
> From: Bogdan Nicolae <bogdan.nicolae@acm.org>
> Sent: Friday, November 5, 2021 10:10 AM
> To: Pkshih <pkshih@realtek.com>
> Cc: linux-wireless@vger.kernel.org
> Subject: Re: No support for Realtek 8821CE RFE Type 6
> 
> Ping-Ke,
> 
> Happy to help, answers below:
> 
> 1. Yes, the kernel shows the following (that's why I started this email thread):
> 
> [    3.541494] rtw_8821ce 0000:03:00.0: Firmware version 24.8.0, H2C version 12
> [    3.558760] rtw_8821ce 0000:03:00.0: rfe 6 isn't supported
> [    3.558890] rtw_8821ce 0000:03:00.0: failed to setup chip efuse info
> [    3.558893] rtw_8821ce 0000:03:00.0: failed to setup chip information
> 
> 2. Unfortunately, I don't have a Windows 10 setup readily available
> 
> 3. The module is soldered onto the motherboard, so I can only show you
> one side. Picture is attached.
> It looks like it's produced by CDTech (China Dragon?):
> https://fcc.report/FCC-ID/ROW-61821CE/5189720.pdf
> There are two antennas, one for 2G, another for 5G shared with
> Bluetooth. Maybe the type 4 driver will work for it out of the box?
> 
> Best,
> Bogdan
> 
> On Wed, Nov 3, 2021 at 7:17 PM Pkshih <pkshih@realtek.com> wrote:
> >
> >
> > > -----Original Message-----
> > > From: Bogdan Nicolae <bogdan.nicolae@acm.org>
> > > Sent: Thursday, November 4, 2021 1:26 AM
> > > To: Pkshih <pkshih@realtek.com>
> > > Cc: linux-wireless@vger.kernel.org
> > > Subject: Re: No support for Realtek 8821CE RFE Type 6
> > >
> > > Thanks Ping-Ke,
> > >
> > > The Realtek Wifi 8821CE RFE Type 6 is used in a broad range of
> > > embedded systems based on Intel Celeron J4125 SoCs. A popular example
> > > is GK3 Mini PC, sold under a large number of brands, for example:
> > > https://www.amazon.com/gp/product/B09FTCPBHK/
> > > These systems are rising in popularity in favor of laptops, as people
> > > tend to stay at home and are looking for affordable upgrades.
> > > Unfortunately, lack of Wifi Linux support is a major drawback.
> > >
> >
> > Could you help to confirm following things:
> >
> > 1. Do you see "rfe 6 isn't supported" in kernel log?
> >    I want to confirm the type again.
> > 2. If you boot this system into Windows 10, does the 8821CE work properly?
> >    If so, please give me its VID/PID of PCI.
> > 3. Could I have the pictures of the module of both sides?
> >    I would like to know the module marker; as well as antenna location.
> >
> > --
> > Ping-Ke
> ------Please consider the environment before printing this e-mail.