linux-kernel - Re: [PATCH v2 10/10] rtw88: disable powersave modes for USB devices

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Message-ID: <8443f8e51774a4f80fed494321fcc410e7174bf1.camel@realtek.com>
Date:   Thu, 9 Jun 2022 12:51:49 +0000
From:   Ping-Ke Shih <pkshih@...ltek.com>
To:     "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>
CC:     "johannes@...solutions.net" <johannes@...solutions.net>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "neojou@...il.com" <neojou@...il.com>,
        "kvalo@...nel.org" <kvalo@...nel.org>,
        "tony0620emma@...il.com" <tony0620emma@...il.com>,
        "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "martin.blumenstingl@...glemail.com" 
        <martin.blumenstingl@...glemail.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux@...i-kroll.de" <linux@...i-kroll.de>
Subject: Re: [PATCH v2 10/10] rtw88: disable powersave modes for USB devices

On Tue, 2022-05-31 at 09:42 +0200, s.hauer@...gutronix.de wrote:
> On Tue, May 31, 2022 at 01:07:36AM +0000, Ping-Ke Shih wrote:
> > On Mon, 2022-05-30 at 15:54 +0200, Sascha Hauer wrote:
> > > The powersave modes do not work with USB devices (tested with a
> > > RTW8822CU) properly. With powersave modes enabled the driver issues
> > > messages like:
> > > 
> > > rtw_8822cu 1-1:1.2: firmware failed to leave lps state
> > > rtw_8822cu 1-1:1.2: timed out to flush queue 3
> > 
> > Could you try module parameter rtw_disable_lps_deep_mode=1 to see
> > if it can work?
> 
> No, this module parameter doesn't seem to make any difference.
> 
> # cat /sys/module/rtw88_core/parameters/disable_lps_deep
> Y
> 
> Still "firmware failed to leave lps state" and poor performance.
> 
> Any other ideas what may go wrong here?
> 

Today, I borrow a 8822cu, and use your patchset but revert
patch 10/10 to reproduce this issue. With firmware 7.3.0,
it looks bad. After checking something about firmware, I
found the firmware is old, so upgrade to 9.9.11, and then
it works well for 10 minutes, no abnormal messages.

Please try if it also works to you.

Ping-Ke