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| author | Bitterblue Smith <rtl8821cerfe2@gmail.com> | 2026-05-20 17:44:35 +0300 |
|---|---|---|
| committer | Ping-Ke Shih <pkshih@realtek.com> | 2026-05-27 11:46:57 +0300 |
| commit | 8368970b62404ce2ce70d04c1cfff62700d7d8d5 (patch) | |
| tree | f7d7293d1826e7267881d6ab6337bc85ded7c21f /include/linux/debugobjects.h | |
| parent | aa7d92e83811a0b557b75f7a0ce85315f4358bf2 (diff) | |
| download | linux-8368970b62404ce2ce70d04c1cfff62700d7d8d5.tar.xz | |
wifi: rtw89: usb: Support switching to USB 3 mode
The Realtek wifi 6/7 devices which support USB 3 are weird: when first
plugged in, they pretend to be USB 2. The driver needs to send some
commands to the device, which make it disappear and come back as a
USB 3 device.
Implement the required commands in rtw89.
Add a new function rtw89_usb_write32_quiet() to avoid the warnings
when writing to R_{AX,BE}_PAD_CTRL2. Even though the write succeeds,
usb_control_msg() returns -EPROTO, probably because the USB device
disappears immediately. This results in some confusing warnings in
the kernel log.
When a USB 3 device is plugged into a USB 2 port, rtw89 will try to
switch it to USB 3 mode only once. The device will disappear and come
back still in USB 2 mode, of course.
Tested with RTL8832AU, RTL8832BU, RTL8832CU, and RTL8912AU.
Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/e955451c-93a1-4d04-8024-d224a04f1d4a@gmail.com
Diffstat (limited to 'include/linux/debugobjects.h')
0 files changed, 0 insertions, 0 deletions