RE: rtl8822cs, mainline 6.16-rc7: kernel reports ' unsupported rf path'

[Ping-Ke Shih <pkshih@realtek.com>]

Piotr Oniszczuk <piotr.oniszczuk@gmail.com> wrote:
> > Wiadomość napisana przez Ping-Ke Shih <pkshih@realtek.com> w dniu 23 lip 2025, o godz. 14:23:
> >
> > Thanks for the hints. I think it's worth to try:
> >
> > diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c
> > index fa0ed39cb199..5ea13c775796 100644
> > --- a/drivers/net/wireless/realtek/rtw88/main.c
> > +++ b/drivers/net/wireless/realtek/rtw88/main.c
> > @@ -1861,6 +1861,8 @@ static int rtw_chip_parameter_setup(struct rtw_dev *rtwdev)
> >        hal->chip_version = rtw_read32(rtwdev, REG_SYS_CFG1);
> >        hal->cut_version = BIT_GET_CHIP_VER(hal->chip_version);
> >        hal->mp_chip = (hal->chip_version & BIT_RTL_ID) ? 0 : 1;
> > +       printk("rtw88: %s:%d hal->chip_version=0x%x\n",
> > +               __func__, __LINE__, hal->chip_version);
> >        if (hal->chip_version & BIT_RF_TYPE_ID) {
> >                hal->rf_type = RF_2T2R;
> >                hal->rf_path_num = 2;
> > diff --git a/drivers/net/wireless/realtek/rtw88/sdio.c b/drivers/net/wireless/realtek/rtw88/sdio.c
> > index cc2d4fef3587..5c9e7c8cdd7e 100644
> > --- a/drivers/net/wireless/realtek/rtw88/sdio.c
> > +++ b/drivers/net/wireless/realtek/rtw88/sdio.c
> > @@ -144,6 +144,10 @@ static u32 rtw_sdio_to_io_address(struct rtw_dev *rtwdev, u32 addr,
> >
> > static bool rtw_sdio_use_direct_io(struct rtw_dev *rtwdev, u32 addr)
> > {
> > +       if (!rtw_sdio_is_bus_addr(addr) &&
> > +           !test_bit(RTW_FLAG_POWERON, rtwdev->flags))
> > +               return false;
> > +
> >        return !rtw_sdio_is_sdio30_supported(rtwdev) ||
> >                rtw_sdio_is_bus_addr(addr);
> > }
> >
> 
> With this change all works ok.
> 15 boots and all 15 were with nice wifi :-)
> 
>  dmesg from working system: https://termbin.com/09a1

I sent a patch [1] with a change that check RTW_FLAG_POWERON flag first, 
so things will be the same as this final try. Still want you test the patch
again, and give me a Tested-by tag there. Thanks.

[1] https://lore.kernel.org/linux-wireless/20250724004815.7043-1-pkshih@realtek.com/T/#u