From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from ixit.cz (ip-94-112-25-9.bb.vodafone.cz [94.112.25.9]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E439F2773D9; Mon, 1 Dec 2025 21:55:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=94.112.25.9 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764626148; cv=none; b=ufGebDhm1pUNePuGI3mmhPDftRcresqr8jP3hk7ruZDkLZFd2loN/Jv1Br93o2iEvxy2utJSHaKPfAwpcES19NeojPVbVN6vX7zy+rF2sUaKcoGcYUjtfIWA4QOdh3PsPCvFHepT/2KGZ2CsxBEAcR5S8EMz1pb8jKGddlmfAis= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764626148; c=relaxed/simple; bh=uBotYgWQ+nx+ouVU9ZBUFlMtI/r+PYbW0lsuUr98/qQ=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Q9rq4GtAkddeDk6rIqgwGBSUWXGnRkp7QuMn8caJIzKyUgzr3qYVTqpC+LqpWIRNeWkPIT4mt18fQqWTiQmsGoKJkEbXQ4v5wl/dPA0IeOFVTB7GyJoVCzQ39fDg8NV0DItoeDXsFWK7Z+68iMgI8+bTELJNP+IJGgGJDdfvPzI= ARC-Authentication-Results:i=1; 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bh=nVQZ/mOTyntm6xDs1fWWvlyqtu62RDo9OfmZeXa06TA=; b=ObvHkTRHxBGfVvBoVvC3xOf4u/YpAvEzbshh4kjwsXPvSIc7tUUVw9JBA/6zRwVn1DdLty Ek9sqsTMN6KreBESgh7tbGeu2PrqrMHlKGbv8jMLaqUaxOle+k9WVAxxmgVEHe3Zkh4Cwu v6bDNeE1BbYQ7buBwnh/sbSndhLZyBI= Message-ID: <63ad4e46-8450-4ec4-bb13-6701f5eec5f6@ixit.cz> Date: Mon, 1 Dec 2025 22:55:40 +0100 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] arm64: dts: qcom: sdm845-oneplus: labibb is not used on OnePlus 6/6T To: Casey Connolly , Konrad Dybcio , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, phone-devel@vger.kernel.org References: <20251130-oneplus-labibb-v1-1-bb3653e43120@ixit.cz> <3fcfc5b8-7509-4e4c-a1cd-e973d7e1d091@oss.qualcomm.com> <0d63bddf-7a88-4c59-8ba3-6655e7a8854e@oss.qualcomm.com> <92c1609c-735d-4b5b-85ff-c40995aab813@linaro.org> Content-Language: en-US From: David Heidelberg Autocrypt: addr=david@ixit.cz; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 01/12/2025 13:57, Casey Connolly wrote: > > > On 01/12/2025 13:55, Konrad Dybcio wrote: >> On 12/1/25 1:50 PM, Casey Connolly wrote: >>> >>> >>> On 01/12/2025 13:48, Konrad Dybcio wrote: >>>> On 11/30/25 1:08 AM, David Heidelberg via B4 Relay wrote: >>>>> From: David Heidelberg >>>>> >>>>> The lab and ibb regulators aren't used here. Disable them. >>>>> >>>>> Removes following warnings: >>>>> qcom-lab-ibb-regulator c440000.spmi:pmic@3:labibb: Failed to create device link (0x180) with supplier c440000.spmi for /soc@0/spmi@c440000/pmic@3/labibb/lab >>>>> qcom-lab-ibb-regulator c440000.spmi:pmic@3:labibb: Failed to create device link (0x180) with supplier c440000.spmi for /soc@0/spmi@c440000/pmic@3/labibb/ibb >>>> >>>> These are only vaguely related, as there's nothing to be wary about that's >>>> specific to these devices - it's just devlink being grumpy >>>> >>>>> Fixes: 288ef8a42612 ("arm64: dts: sdm845: add oneplus6/6t devices") >>>>> Signed-off-by: David Heidelberg >>>>> --- >>>>> I assume this is right approach, as OLEDs on both devices are driven by >>>>> different regulators. >>>>> >>>>> Question is, if should be labibb nodes enabled by default? >>>> >>>> They're onboard. I'd rather keep them predictably parked than left in >>>> whatever (potentially ON) state the bootloader may leave them at >>> >>> Shouldn't they be default disabled in the pmic dtsi and only enabled on >>> the devices that actually use them? Many SDM845 devices with OLED panels >>> don't use these regulators. >> >> As I said, I wouldn't be surprised if they were enabled by the bootloader >> as part of some reference/common routine and left hanging. Linux will >> switch them off if they're never used and I'm fairly sure the users won't >> mind the odd couple dozen bytes of runtime kernel memory usage (which if >> we go that route probably balance out with the added couple characters for >> status=disabled in the resulting DTB) > > Ahh yeah I understand, the DT node has to be enabled for the driver to > load and actually turn off the regulators if they're unused. Makes sense. > > Thanks,> >> Konrad > Thank you both, now I also understand (and withdrawing the patch). Should 5dcc6587fde2 ("arm64: dts: qcom: sdm845-tama: Add display nodes") also get fixed up to not disable the lab & ibb node then? Thanks David -- David Heidelberg