linux-kernel - RE: [PATCH] ASoC: SOF: Intel: hda: unsolicited RIRB response

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Date:   Fri, 12 Jun 2020 06:15:58 +0000
From:   "Lu, Brent" <brent.lu@...el.com>
To:     Takashi Iwai <tiwai@...e.de>
CC:     Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        "Pierre-Louis Bossart DRIVERS" <pierre-louis.bossart@...ux.intel.com>,
        "authored:2/16=12%,added_lines:21/248=8%,removed_lines:5/84=6%,),Liam
        Girdwood DRIVERS )" <lgirdwood@...il.com>,
        "commit_signer:6/16=38%,authored:6/16=38%,added_lines:123/248=50% 
        ,removed_lines:36/84=43%,Kai Vehmanen DRIVERS )" 
        <kai.vehmanen@...ux.intel.com>,
        "Daniel Baluta DRIVERS )" <daniel.baluta@....com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        "Rojewski, Cezary" <cezary.rojewski@...el.com>,
        Zhu Yingjiang <yingjiang.zhu@...ux.intel.com>,
        Keyon Jie <yang.jie@...ux.intel.com>,
        Bard Liao <yung-chuan.liao@...ux.intel.com>,
        "sound-open-firmware@...a-project.orgDRIVERS" 
        <sound-open-firmware@...a-project.orgDRIVERS>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] ASoC: SOF: Intel: hda: unsolicited RIRB response

> 
> Now I noticed that the legacy driver already addressed it recently via commit
> 6d011d5057ff
>     ALSA: hda: Clear RIRB status before reading WP
> 
> We should have checked SOF at the same time, too...
> 
> 
> thanks,
> 
> Takashi

Hi Takashi-san,

Yes you are correct. I tested Chrome v5.4 on a CML Chromebook 'hatch' and
realize the SOF does no suffer from this issue because the 'sync write' feature
is enabled in hda_init. Soon I can reproduce the issue after turning it off. So I
think it's still worthy to have this fix in case we need to disable 'sync write'
someday.


Regards,
Brent