linux-kernel - Re: [PATCH v2] platform/x86/intel/pmc Fix Arrow Lake U/H support to intel_pmc

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Message-Id: <174773612605.1880.7682337143207967545.b4-ty@linux.intel.com>
Date: Tue, 20 May 2025 13:15:26 +0300
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: platform-driver-x86@...r.kernel.org, xi.pardee@...ux.intel.com, 
 Todd Brandt <todd.e.brandt@...el.com>
Cc: linux-kernel@...r.kernel.org, todd.e.brandt@...ux.intel.com
Subject: Re: [PATCH v2] platform/x86/intel/pmc Fix Arrow Lake U/H support
 to intel_pmc_core driver

On Fri, 16 May 2025 10:05:07 -0700, Todd Brandt wrote:

> The ARL requires that the GMA and NPU devices both be in D3Hot in order
> for PC10 and S0iX to be achieved in S2idle. The original ARL-H/U addition
> to the intel_pmc_core driver attempted to do this by switching them to D3
> in the init and resume calls of the intel_pmc_core driver.
> 
> The problem is the ARL-H/U have a different NPU device and thus are not
> being properly set and thus S0iX does not work properly in ARL-H/U. This
> patch creates a new ARL-H specific device id that is correct and also
> adds the D3 fixup to the suspend callback. This way if the PCI devies
> drop from D3 to D0 after resume they can be corrected for the next
> suspend. Thus there is no dropout in S0iX.
> 
> [...]


Thank you for your contribution, it has been applied to my local
review-ilpo-fixes branch. Note it will show up in the public
platform-drivers-x86/review-ilpo-fixes branch only once I've pushed my
local branch there, which might take a while.

The list of commits applied:
[1/1] platform/x86/intel/pmc Fix Arrow Lake U/H support to intel_pmc_core driver
      commit: 219aadc94ba0bddc1355ce5c5abba7fc96e758a2

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 i.