6.6-stable review patch. If anyone has any objections, please let me know.
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From: Ping-Ke Shih pkshih@realtek.com
[ Upstream commit f3ccdfda345ca9a624ea425840a926b8338c1e25 ]
The indirect IO is necessary for RTL8822CS, but not necessary for other chips. Otherwiese, it throws errors and becomes unusable.
rtw88_8723cs mmc1:0001:1: WOW Firmware version 11.0.0, H2C version 0 rtw88_8723cs mmc1:0001:1: Firmware version 11.0.0, H2C version 0 rtw88_8723cs mmc1:0001:1: sdio read32 failed (0xf0): -110 rtw88_8723cs mmc1:0001:1: sdio write8 failed (0x1c): -110 rtw88_8723cs mmc1:0001:1: sdio read32 failed (0xf0): -110
By vendor driver, only RTL8822CS and RTL8822ES need indirect IO, but RTL8822ES isn't supported yet. Therefore, limit it to RTL8822CS only.
Reported-by: Andrey Skvortsov andrej.skvortzov@gmail.com Closes: https://lore.kernel.org/linux-wireless/07a32e2d6c764eb1bd9415b5a921a652@real... Fixes: 58de1f91e033 ("wifi: rtw88: sdio: use indirect IO for device registers before power-on") Signed-off-by: Ping-Ke Shih pkshih@realtek.com Tested-by: Andrey Skvortsov andrej.skvortzov@gmail.com Link: https://patch.msgid.link/1764034729-1251-1-git-send-email-pkshih@realtek.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/wireless/realtek/rtw88/sdio.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/realtek/rtw88/sdio.c b/drivers/net/wireless/realtek/rtw88/sdio.c index df4248744d87..025a97526551 100644 --- a/drivers/net/wireless/realtek/rtw88/sdio.c +++ b/drivers/net/wireless/realtek/rtw88/sdio.c @@ -143,8 +143,10 @@ 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) { + bool might_indirect_under_power_off = rtwdev->chip->id == RTW_CHIP_TYPE_8822C; + if (!test_bit(RTW_FLAG_POWERON, rtwdev->flags) && - !rtw_sdio_is_bus_addr(addr)) + !rtw_sdio_is_bus_addr(addr) && might_indirect_under_power_off) return false;
return !rtw_sdio_is_sdio30_supported(rtwdev) ||