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Tue, 18 Aug 2026 22:19:24 -0700 (PDT) X-Received: by 2002:a17:90b:4b91:b0:384:927f:3db9 with SMTP id 98e67ed59e1d1-3957f874e86mr2285880a91.1.1787116763677; Tue, 18 Aug 2026 22:19:23 -0700 (PDT) Received: from [192.168.1.6] ([171.76.87.173]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3957fc4a022sm441296a91.4.2026.08.18.22.19.18 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 18 Aug 2026 22:19:22 -0700 (PDT) Message-ID: <872897af-6357-460e-9aa0-158eda22aa43@oss.qualcomm.com> Date: Wed, 19 Aug 2026 10:49:17 +0530 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 3/8] platform: arm64: qcom-hamoa-ec: Switch fan profile based on power supply state From: Anvesh Jain P To: Konrad Dybcio , Sibi Sankar , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Hans de Goede , =?UTF-8?Q?Ilpo_J=C3=A4rvinen?= , Bryan O'Donoghue , Bjorn Andersson , Konrad Dybcio Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org References: <20260728-ec_add_more_commands-v1-0-771abd65ee1a@oss.qualcomm.com> <20260728-ec_add_more_commands-v1-3-771abd65ee1a@oss.qualcomm.com> <1612b46d-1291-4593-b24e-464ba2a180ed@oss.qualcomm.com> Content-Language: en-US In-Reply-To: <1612b46d-1291-4593-b24e-464ba2a180ed@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Authority-Analysis: v=2.4 cv=PoGjqQM3 c=1 sm=1 tr=0 ts=6a853cdd cx=c_pps a=vVfyC5vLCtgYJKYeQD43oA==:117 a=alUBXKyVNpYQNee0O81Cpw==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_glEPmIy2e8OvE2BGh3C:22 a=zvO9yiSBen9DV1Ab8akA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=rl5im9kqc5Lf4LNbBjHf:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODE5MDAzNyBTYWx0ZWRfX4kK5DKKllqdN mVJMuiRSYMCqqOqW+NbOYMoieJLSkEC8nzL/LtOtERB/zRvLNjC3cGChiHNR2lCox5qxpq5yVte aYCPKKsxvVgCPe3iE37FdtteXkhlE89xpglhcemnMZDUh5t6nuLq69skxGfgMUlrowz3T31rw91 SYRBvGrTs5gAB7BwFBWRB/oYX/wVx9Jdll8VjrC0XUPjl2hHO8PKMkOmrXrN5XmqGQPoL/gzJtH RiOWYcfoRXC5xv6xixVZZGzRgB3YDHbi9/WwrXCVZnDMsAWmu84aUY0lOHiKtym0GIA2/LYg4Bl +RHJtBOd1qR7mA4zNf34dTNz4wsC/kraWbvpLpvpT5HhwlEhnCbv8uRHK/HGf8evAd26YDzybbA VijqNjBWNUkpEijQWwRQgvV3VnIp5bPcUoocIonE+xZyjn0gP7frHsj1B4bpyqoMC8dXn2y/zZA G04TLioVclbxku8DrwQ== X-Proofpoint-Spam-Info: AW1haW4tMjYwODE5MDAzNyBTYWx0ZWRfX39eAlwFEdBcg Jzmwi0OPD8t/Kcc+REld71aXyfI1EfFvAG1wGBSswcypM5AQOZPICezRDBezQkRgxJgQRnjPBo/ 2M5X1mZasAEGY4Bbn4M8mR0K2vDVfXQ= X-Proofpoint-GUID: qGGD3eJVcKZi0cPWgk_cEVa39YoPVa1W X-Proofpoint-ORIG-GUID: qGGD3eJVcKZi0cPWgk_cEVa39YoPVa1W X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-19_01,2026-08-18_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 bulkscore=0 spamscore=0 suspectscore=0 lowpriorityscore=0 malwarescore=0 impostorscore=0 phishscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608190037 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