From: Anvesh Jain P <anvesh.p@oss.qualcomm.com>
To: "Konrad Dybcio" <konrad.dybcio@oss.qualcomm.com>,
"Sibi Sankar" <sibi.sankar@oss.qualcomm.com>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"Hans de Goede" <hansg@kernel.org>,
"Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>,
"Bryan O'Donoghue" <bryan.odonoghue@linaro.org>,
"Bjorn Andersson" <andersson@kernel.org>,
"Konrad Dybcio" <konradybcio@kernel.org>
Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
platform-driver-x86@vger.kernel.org
Subject: Re: [PATCH 3/8] platform: arm64: qcom-hamoa-ec: Switch fan profile based on power supply state
Date: Wed, 19 Aug 2026 10:49:17 +0530 [thread overview]
Message-ID: <872897af-6357-460e-9aa0-158eda22aa43@oss.qualcomm.com> (raw)
In-Reply-To: <1612b46d-1291-4593-b24e-464ba2a180ed@oss.qualcomm.com>
On 7/30/2026 11:51 AM, Anvesh Jain P wrote:
>> Is being on a (powerful) charger a prerequisite for entering this profile?
>> Currently plugging in a 5W charger would trigger the switch as well.
>>
>> Should this instead be exposed as a fan profile for userspace?
>>
>> Konrad
> Fair point — power_supply_is_system_supplied() only checks mains
> presence, not charger wattage, so even a 5W charger triggers the "best
> performance" profile. And exposing this via platform_profile instead of
> an automatic AC/battery switch would let userspace make the call
> instead. Will check on the feasibility of making this possible.
Even at 5W we're still not battery-constrained, so best performance
still makes sense, it's about wall power vs battery, not wattage. And I
don't think userspace needs control over this either, it's just an
automatic fan curve pick, not a performance setting users would want to
tune themselves.
--
Best Regards,
Anvesh
next prev parent reply other threads:[~2026-08-19 5:19 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-28 17:44 [PATCH 0/8] Extend Qualcomm reference device EC driver with fan LUT, profile and SoC Tj support Anvesh Jain P
2026-07-28 17:44 ` [PATCH 1/8] dt-bindings: embedded-controller: qcom,hamoa-crd-ec: Add qcom,tsens Anvesh Jain P
2026-07-28 17:54 ` sashiko-bot
2026-08-05 9:54 ` Anvesh Jain P
2026-07-29 11:08 ` Krzysztof Kozlowski
2026-07-29 11:54 ` Anvesh Jain P
2026-07-29 12:32 ` Krzysztof Kozlowski
2026-07-29 13:00 ` Anvesh Jain P
2026-07-29 11:13 ` Konrad Dybcio
2026-07-29 12:13 ` Anvesh Jain P
2026-07-30 17:11 ` Konrad Dybcio
2026-07-31 5:55 ` Anvesh Jain P
2026-07-28 17:44 ` [PATCH 2/8] platform: arm64: qcom-hamoa-ec: Add SoC junction temperature reporting Anvesh Jain P
2026-07-28 18:02 ` sashiko-bot
2026-08-05 10:40 ` Anvesh Jain P
2026-07-29 10:59 ` Konrad Dybcio
2026-07-29 13:03 ` Anvesh Jain P
2026-07-30 17:04 ` Konrad Dybcio
2026-07-31 5:47 ` Anvesh Jain P
2026-07-28 17:44 ` [PATCH 3/8] platform: arm64: qcom-hamoa-ec: Switch fan profile based on power supply state Anvesh Jain P
2026-07-28 18:05 ` sashiko-bot
2026-08-05 13:12 ` Anvesh Jain P
2026-07-29 11:02 ` Konrad Dybcio
2026-07-30 6:21 ` Anvesh Jain P
2026-08-19 5:19 ` Anvesh Jain P [this message]
2026-07-28 17:44 ` [PATCH 4/8] platform: arm64: qcom-hamoa-ec: Add fan RPM query and LUT calibration Anvesh Jain P
2026-07-28 18:15 ` sashiko-bot
2026-08-05 13:15 ` Anvesh Jain P
2026-07-29 11:07 ` Konrad Dybcio
2026-07-30 6:35 ` Anvesh Jain P
2026-07-30 17:08 ` Konrad Dybcio
2026-07-31 6:25 ` Anvesh Jain P
2026-08-19 5:13 ` Anvesh Jain P
2026-07-28 17:44 ` [PATCH 5/8] platform: arm64: qcom-hamoa-ec: Verify required I2C adapter functionality Anvesh Jain P
2026-07-28 18:14 ` sashiko-bot
2026-08-05 14:20 ` Anvesh Jain P
2026-07-29 11:08 ` Konrad Dybcio
2026-07-30 6:37 ` Anvesh Jain P
2026-07-28 17:44 ` [PATCH 6/8] platform: arm64: qcom-hamoa-ec: Retry I2C transfers on NACK Anvesh Jain P
2026-07-28 18:26 ` sashiko-bot
2026-08-05 15:10 ` Anvesh Jain P
2026-07-29 11:11 ` Konrad Dybcio
2026-07-30 6:40 ` Anvesh Jain P
2026-07-28 17:44 ` [PATCH 7/8] arm64: dts: qcom: x1p42100-crd: Add qcom,tsens for EC fan thermal management Anvesh Jain P
2026-07-28 18:26 ` sashiko-bot
2026-08-06 4:29 ` Anvesh Jain P
2026-07-28 17:44 ` [PATCH 8/8] arm64: dts: qcom: x1e80100-crd: " Anvesh Jain P
2026-07-28 18:36 ` sashiko-bot
2026-08-06 4:37 ` Anvesh Jain P
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