linux-kernel - RE: [PATCH] rtw88: 8821c: disable the ASPM of RTL8821CE

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Message-ID: <6b0fcc8cf3bd4a77ad190dc6f72eb66f@realtek.com>
Date:   Fri, 10 Dec 2021 09:00:03 +0000
From:   Pkshih <pkshih@...ltek.com>
To:     Jian-Hong Pan <jhp@...lessos.org>,
        Yan-Hsuan Chuang <tony0620emma@...il.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "Kai-Heng Feng (kai.heng.feng@...onical.com)" 
        <kai.heng.feng@...onical.com>
CC:     "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux@...lessos.org" <linux@...lessos.org>
Subject: RE: [PATCH] rtw88: 8821c: disable the ASPM of RTL8821CE

+Kai-Heng

> -----Original Message-----
> From: Jian-Hong Pan <jhp@...lessos.org>
> Sent: Friday, December 10, 2021 4:17 PM
> To: Pkshih <pkshih@...ltek.com>; Yan-Hsuan Chuang <tony0620emma@...il.com>; Kalle Valo
> <kvalo@...eaurora.org>
> Cc: linux-wireless@...r.kernel.org; netdev@...r.kernel.org; linux-kernel@...r.kernel.org;
> linux@...lessos.org; Jian-Hong Pan <jhp@...lessos.org>
> Subject: [PATCH] rtw88: 8821c: disable the ASPM of RTL8821CE
> 
> More and more laptops become frozen, due to the equipped RTL8821CE.
> 
> This patch follows the idea mentioned in commits 956c6d4f20c5 ("rtw88:
> add quirks to disable pci capabilities") and 1d4dcaf3db9bd ("rtw88: add
> quirk to disable pci caps on HP Pavilion 14-ce0xxx"), but disables its
> PCI ASPM capability of RTL8821CE directly, instead of checking DMI.
> 
> Buglink:https://bugzilla.kernel.org/show_bug.cgi?id=215239
> Fixes: 1d4dcaf3db9bd ("rtw88: add quirk to disable pci caps on HP Pavilion 14-ce0xxx")
> Signed-off-by: Jian-Hong Pan <jhp@...lessos.org>

We also discuss similar thing in this thread: 
https://bugzilla.kernel.org/show_bug.cgi?id=215131

Since we still want to turn on ASPM to save more power, I would like to 
enumerate the blacklist. Does it work to you?
If so, please help to add one quirk entry of your platform.

Another thing is that "attachment 299735" is another workaround for certain
platform. And, we plan to add quirk to enable this workaround.
Could you try if it works to you?

Thank you
--
Ping-Ke