RE: [PATCH rtw-next] wifi: rtw89: Turbo mode for RTL8851BU/RTL8852BU

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

Bitterblue Smith <rtl8821cerfe2@gmail.com> wrote:
> RTL8851BU and RTL8852BU currently have much lower TX speed than
> expected, ~100 and ~300 Mbps, respectively. This is because part of the
> chip's memory is allocated for some unknown firmware features instead of
> the TX buffers.
> 
> The vendor drivers have a module parameter called "rtw_quota_turbo_en",
> which can be used to choose between full TX speed or the unknown
> firmware features. It is on by default.
> 
> Change the relevant chip parameters to implement the turbo mode. Do it
> only for USB because PCI is already fast even without the turbo mode.
> It's unclear if SDIO will need it or not.
> 
> Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>

Acked-by: Ping-Ke Shih <pkshih@realtek.com>


> ---
> 
> What firmware features are we missing when we use the turbo mode?
> Is it anything important?

I asked experts internally. This change is totally fine and doesn't affect
firmware features. For newer driver, turbo mode (quota) is adopted.