> -----Original Message----- > From: Konstantin Kletschke <konstantin.kletschke@xxxxxxxxxxxxx> > Sent: Thursday, March 21, 2024 6:56 PM > To: linux-wireless@xxxxxxxxxxxxxxx > Subject: AP mode on RTW88 8821cs > > We have a rockchip rk3328 board with an 8821cs chip connected via SDIO. > Well, cs impiles SDIO, cu is USB variant. > > Normally thinks work quite well for use but we do not get AP mode to > work. > We use 6.5.13 kernel with our customized DT and the in kernel 8821cs > driver: > > rtw88_8821cs 12288 0 > onboard_usb_hub 12288 0 > rtw88_8821c 81920 1 rtw88_8821cs > crct10dif_ce 12288 1 > rtw88_sdio 24576 1 rtw88_8821cs > rtw88_core 167936 2 rtw88_8821c,rtw88_sdio > mac80211 929792 2 rtw88_sdio,rtw88_core > libarc4 12288 1 mac80211 > cfg80211 921600 2 rtw88_core,mac80211 > > We tried with wpa_cli and hostapd but to no avail. > I tried hostapd with wlan0 and eth0 bridged into br0, the SSID appears > in the wlan search results in other devices, connectig _seems_ to work > but getting an IP is not possible. > > What my colleauge and me especially noticed, the TX counter for the > wlan0 interface in this use case runs, RX stays at 0: > > br0 Link encap:Ethernet HWaddr 4A:86:7D:63:5C:59 > inet addr:10.16.10.103 Bcast:10.16.255.255 Mask:255.255.0.0 > inet6 addr: fe80::4886:7dff:fe63:5c59/64 Scope:Link > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 > RX packets:111361 errors:0 dropped:3479 overruns:0 frame:0 > TX packets:28144 errors:0 dropped:0 overruns:0 carrier:0 > collisions:0 txqueuelen:1000 > RX bytes:13333769 (12.7 MiB) TX bytes:3847859 (3.6 MiB) > > eth0 Link encap:Ethernet HWaddr 86:E0:C0:EA:FA:A8 > inet6 addr: fe80::84e0:c0ff:feea:faa8/64 Scope:Link > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 > RX packets:112803 errors:0 dropped:219 overruns:0 frame:0 > TX packets:28405 errors:0 dropped:0 overruns:0 carrier:0 > collisions:0 txqueuelen:1000 > RX bytes:15102222 (14.4 MiB) TX bytes:3891727 (3.7 MiB) > Interrupt:51 > > wlan0 Link encap:Ethernet HWaddr F0:B0:40:4F:70:BC > inet6 addr: fe80::f2b0:40ff:fe4f:70bc/64 Scope:Link > UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 > RX packets:0 errors:0 dropped:0 overruns:0 frame:0 > TX packets:123446 errors:0 dropped:0 overruns:0 carrier:0 > collisions:0 txqueuelen:1000 > RX bytes:0 (0.0 B) TX bytes:18783966 (17.9 MiB) > > In order to provide useful debug information, what should I look into? > > Is it a known issue or should AP mode work flawlessly with those > drivers, which implies I forgot something. > When I use my software with an external USB WLAN stick with another > driver, exchange all wlan0 by wlan1 occurences only: > > rtl8xxxu 192512 0 > rtl8192cu 81920 0 > rtl_usb 16384 1 rtl8192cu > rtl8192c_common 65536 1 rtl8192cu > rtlwifi 118784 3 rtl8192c_common,rtl_usb,rtl8192cu > > the software AP works immediately. > We had similar discussion before [1]. I think Martin will take his time to investigate how to enable AP mode on SDIO WiFi cards. [1] https://lore.kernel.org/linux-wireless/36972ff5-0c48-4bd2-8f9a-9649bfa24225@xxxxxxxxx/
