RE: [PATCH net-next v1] net: phy: realtek: improve firmware write speed

[Javen]

>
>On Thu, Sep 10, 2026 at 10:49:26AM +0800, javen wrote:
>> From: Javen Xu <javen_xu@xxxxxxxxxxxxxx>
>>
>> Firmware execution routine unconditionally uses phy_modify_mmd() for
>> all OP_WRITE entries which introduces an unnecessary read transaction
>> when updating an entire 16-bit register. So we optimize this by
>> checking bitmask boundaries. Use phy_write_mmd() directly to speed up
>> firmware loading process.
>
>For optimisations, it is normal to include some benchmark numbers to show
>how big a change it made. Is the added complexity worth the change?
>

I traced the actual MDC/MDIO hardware transactions during firmware loading process. Here are the benchmark numbers:

- Unpatched : about 28,000 MDIO transactions.
- Patched: about 9,600 MDIO transactions.

This results in a 65% reduction in MDIO traffic.

Thanks,
Javen

>        Andrew