[PATCH 0/1][SRU][linux-firmware][F] support RTL8821CE RFE Type 2
You-Sheng Yang
vicamo.yang at canonical.com
Thu Mar 4 06:31:00 UTC 2021
BugLink: https://bugs.launchpad.net/bugs/1885862
[Impact]
RTL8821CE RFE Type 2 PCIE module is not supported by new rtw88 driver
in kernel version v5.11 or older. Dmesg gives:
rtw_8821ce 0000:01:00.0: enabling device (0000 -> 0003)
rtw_8821ce 0000:01:00.0: Firmware version 24.8.0, H2C version 12
rtw_8821ce 0000:01:00.0: rfe 2 isn't supported
rtw_8821ce 0000:01:00.0: failed to setup chip efuse info
rtw_8821ce 0000:01:00.0: failed to setup chip information
Such modules are previosly covered by rtl8821ce-dkms.
[Fix]
Patch set
https://lore.kernel.org/linux-wireless/20210202055012.8296-1-pkshih@realtek.com/
landed in v5.12-rc1, as well as WLAN firmware updates in commit
c5e3240eff0f ("rtw88: RTL8821C: Update firmware to v24.8"), which is
already available in Hirsute version 1.195. Bluetooth firmware should
have been the latest 0x829a_7644 in both Focal/Hirsute.
[Test Case]
With patched kernel, wlan interface should be up and running:
rtw_8821ce 0000:01:00.0: enabling device (0000 -> 0003)
rtw_8821ce 0000:01:00.0: Firmware version 24.8.0, H2C version 12
rtw_8821ce 0000:01:00.0 wlp1s0: renamed from wlan0
[Where problems could occur]
Previously this hardware piece can only be driven by external DKMS
modules, so with this driver patched, users can now use in-tree driver,
but may experience the difference between them in power consumption or
feature supportness.
[Other Info]
While Bionic/Focal LTS is still using rtl8821ce-dkms for RFE Type 2
cards, there is no plan to introduce such change to them. So they'll be
upgraded only at the next point release with kernel >= 5.11.
Guo-Feng Fan (1):
rtw88: RTL8821C: Update firmware to v24.8
rtw88/rtw8821c_fw.bin | Bin 137896 -> 138984 bytes
1 file changed, 0 insertions(+), 0 deletions(-)
--
2.30.0
More information about the kernel-team
mailing list