From: Pierre-Louis Bossart <pierre-louis.bossart@linux.dev>
To: Charles Keepax <ckeepax@opensource.cirrus.com>
Cc: broonie@kernel.org, vkoul@kernel.org, lgirdwood@gmail.com,
yung-chuan.liao@linux.intel.com, peter.ujfalusi@linux.intel.com,
oder_chiou@realtek.com, jack.yu@realtek.com,
shumingf@realtek.com, linux-sound@vger.kernel.org,
linux-kernel@vger.kernel.org, patches@opensource.cirrus.com
Subject: Re: [PATCH 3/3] soundwire: dmi-quirks: Disable ghost Realtek devices
Date: Thu, 21 May 2026 15:36:59 +0200 [thread overview]
Message-ID: <63015dba-c88d-4de3-970e-769c5319366c@linux.dev> (raw)
In-Reply-To: <ag6/q8O737wtHB/z@opensource.cirrus.com>
On 5/21/26 10:17, Charles Keepax wrote:
> On Wed, May 20, 2026 at 07:16:55PM +0200, Pierre-Louis Bossart wrote:
>> On 5/20/26 18:36, Charles Keepax wrote:
>> Could we filter instead those 'ghost' devices if they fail to
>> appear in the new ACPI table that describes all the endpoints
>> and card topology?
>
> Eventually perhaps once that makes it out of the standardisation
> process (I believe the committee is looking at it), but for now
> that is all Microsoft magic that I would rather avoid.
Nothing prevents developers from reverse-engineering DSDT contents. I remember seeing all the information needed in the DSDT of one of the Dell devices.
The standardization was supposed to happen before Covid, I looked at this in 2020-2021. If it hasn't happened by now it's unlikely it ever will...
This DSDT information is interesting for Intel platforms, it could help probe a generic machine driver for the card but raises other problems with deferred probe,
c.f. https://lore.kernel.org/alsa-devel/20210817190057.255264-2-pierre-louis.bossart@linux.intel.com/
Anyways this patchset isn't wrong either, so
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.dev>
next prev parent reply other threads:[~2026-05-21 13:38 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-20 16:36 [PATCH 0/3] Update some topology matching for newer laptops Charles Keepax
2026-05-20 16:36 ` [PATCH 1/3] ASoC: soc-acpi-intel-ptl-match: Make Chrome matches conditional Charles Keepax
2026-05-20 16:36 ` [PATCH 2/3] ASoC: Intel: soc-acpi-intel-ptl-match: Remove unnecessary cs42l43 match Charles Keepax
2026-05-20 16:36 ` [PATCH 3/3] soundwire: dmi-quirks: Disable ghost Realtek devices Charles Keepax
2026-05-20 17:16 ` Pierre-Louis Bossart
2026-05-21 1:09 ` Liao, Bard
2026-05-21 8:17 ` Charles Keepax
2026-05-21 13:36 ` Pierre-Louis Bossart [this message]
2026-05-21 18:18 ` (subset) [PATCH 0/3] Update some topology matching for newer laptops Mark Brown
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