Bitterblue Smith <rtl8821cerfe2@xxxxxxxxx> wrote:
>
> Tell the chip the maximum AMPDU size supported by the AP. This greatly
> improves the TX speed of RTL8814AU in the 2.4 GHz band. Before: ~90
> Mbps. After: ~300 Mbps.
>
> Add this configuration for all the chips, even if it only has an effect
> on RTL8814AU in my tests. Surely they all need this.
The hardware default value of REG_AMPDU_MAX_LENGTH is 0xffff (unlimited)
for most chips. It seems like RTL8812A/RTL8821A are also exceptions, so
at power on function they do
rtw_write32(rtwdev, REG_AMPDU_MAX_LENGTH, 0xffffffff);
I feel RTL8814A has similar setting, so maybe you can just add similar
stuff.
By the way, the AMPDU is controlled by TX descriptor basically:
pkt_info->ampdu_factor = ampdu_factor;
pkt_info->ampdu_density = ampdu_density;
pkt_info->ampdu_en = ampdu_en;
Since you didn't change this part at all, I still feel setting
REG_AMPDU_MAX_LENGTH to 0xffffffff can fix low throughput problem.
