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Re: [PATCH v2] ath9k: fix QCA9561 PA bias level

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Thibaut VARÈNE <hacks+kernel@xxxxxxxxxxxxx> writes:

> This patch fixes an invalid TX PA DC bias level on QCA9561, which
> results in a very low output power and very low throughput as devices
> are further away from the AP (compared to other 2.4GHz APs).
>
> This patch was suggested by Felix Fietkau, who noted[1]:
> "The value written to that register is wrong, because while the mask
> definition AR_CH0_TOP2_XPABIASLVL uses a different value for 9561, the
> shift definition AR_CH0_TOP2_XPABIASLVL_S is hardcoded to 12, which is
> wrong for 9561."
>
> In real life testing, without this patch the 2.4GHz throughput on
> Yuncore XD3200 is around 10Mbps sitting next to the AP, and closer to
> practical maximum with the patch applied.
>
> [1] https://lore.kernel.org/all/91c58969-c60e-2f41-00ac-737786d435ae@xxxxxxxx
>
> Signed-off-by: Thibaut VARÈNE <hacks+kernel@xxxxxxxxxxxxx>

Thank you for the fix!

Acked-by: Toke Høiland-Jørgensen <toke@xxxxxxx>




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