linux-kernel - Re: [PATCH v2 13/13] arm64: dts: qcom: sdm845-lg-judyln: Add lab/ibb

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Message-ID: <adbbc9cd-dfe7-4983-865d-d311cddbdbf1@oss.qualcomm.com>
Date: Wed, 17 Sep 2025 15:46:51 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Paul Sajna <sajattack@...tmarketos.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>, David Heidelberg <david@...t.cz>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, phone-devel@...r.kernel.org,
        Amir Dahan <system64fumo@...tonmail.com>,
        Christopher Brown <crispybrown@...il.com>
Subject: Re: [PATCH v2 13/13] arm64: dts: qcom: sdm845-lg-judyln: Add lab/ibb

On 9/17/25 3:09 AM, Paul Sajna wrote:
> `regulator-always-on;` in ibb improves display blanking issue

..but doesn't let you save power when the display is not in use

That suggests your panel driver may not be sequencing the supplies
properly (or maybe the reset pin/commands may be misplaced)

Konrad