netdev - RE: [PATCH net 9/9] r8152: disable DelayPhyPwrChg

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Message-ID: <fdd1b5e0538347698f0ca88aaef26617@realtek.com>
Date:   Wed, 22 Jan 2020 07:50:18 +0000
From:   Hayes Wang <hayeswang@...ltek.com>
To:     Grant Grundler <grundler@...omium.org>
CC:     netdev <netdev@...r.kernel.org>, nic_swsd <nic_swsd@...ltek.com>,
        LKML <linux-kernel@...r.kernel.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        Prashant Malani <pmalani@...omium.org>
Subject: RE: [PATCH net 9/9] r8152: disable DelayPhyPwrChg

Grant Grundler [mailto:grundler@...omium.org]
> Sent: Wednesday, January 22, 2020 3:03 PM
[...]
> Did you mean "don't allow the phy to enter P3 power saving mode"?
> If P3 power saving mode is broken, what is the symptom?

Yes.
It increases power consumption.

PS. the "phy" is for USB, not for Ethernet.

> How long is the delay when this is still enabled? (to help identify
> failures when this is still enabled)

When this is enable, the device would wait an internal signal which
wouldn't be triggered. Then, the device couldn't enter P3 mode, so the
power consumption is increased.

Best Regards,
Hayes