From: Daniel Gibson <daniel@gibson.sh>
To: "Thomas Gleixner" <tglx@kernel.org>,
"Ingo Molnar" <mingo@redhat.com>,
"Borislav Petkov" <bp@alien8.de>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
"Jonathan Corbet" <corbet@lwn.net>,
"Shuah Khan" <skhan@linuxfoundation.org>,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
"Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>
Cc: Daniel Gibson <daniel@gibson.sh>
Subject: [PATCH 0/2] Document amd_pmc delay_suspend quirk
Date: Wed, 24 Jun 2026 14:43:24 +0200 [thread overview]
Message-ID: <20260624124326.746525-1-daniel@gibson.sh> (raw)
Recently I submitted patches that work around an EC bug in some Lenovo
IdeaPad laptops by adding a quirk to amd_pmc that is enabled
automatically for detected devices and can be enforced (to test on
possibly affected devices that aren't detected yet) with the
delay_suspend module parameter. The quirk makes the kernel sleep
for 2.5 seconds before actually suspending.
Now that those patches are in mainline and their commit IDs are known,
I submit the documentation for them, which refers the commit IDs.
There's also another small change to the same documentation file that
clarifies how to identify kernel log lines with information from the
reset register, because so far it was only mentioned that this
information is logged, but not how to find it.
See also https://bugzilla.kernel.org/show_bug.cgi?id=221383 and
https://lore.kernel.org/platform-driver-x86/20260611150426.3683372-1-daniel@gibson.sh/T/#u
These documentation changes were last discussed here:
https://lore.kernel.org/platform-driver-x86/20260509013105.816339-5-daniel@gibson.sh/t/#u
Daniel Gibson (2):
Documentation/arch/x86/amd-debugging: Add example for reset register
Documentation/arch/x86/amd-debugging: Add section about delay_suspend
Documentation/arch/x86/amd-debugging.rst | 30 ++++++++++++++++++++++++
1 file changed, 30 insertions(+)
--
2.48.1
next reply other threads:[~2026-06-24 12:43 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-24 12:43 Daniel Gibson [this message]
2026-06-24 12:43 ` [PATCH 1/2] Documentation/arch/x86/amd-debugging: Add example for reset register Daniel Gibson
2026-06-24 12:43 ` [PATCH 2/2] Documentation/arch/x86/amd-debugging: Add section about delay_suspend Daniel Gibson
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