From: Val Packett <val@packett.cool>
To: Luca Weiss <luca.weiss@fairphone.com>,
Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>,
Abel Vesa <abelvesa@kernel.org>, Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Cc: ~postmarketos/upstreaming@lists.sr.ht,
phone-devel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org
Subject: Re: [PATCH 4/4] arm64: dts: qcom: sm7225-fairphone-fp4: Wire up PM6150L LCDB
Date: Fri, 13 Nov 2026 10:09:13 -0300 [thread overview]
Message-ID: <e2f89f72-be30-495d-99c8-828cd170ce50@packett.cool> (raw)
In-Reply-To: <DMU3O9G3L6PD.2CE9WCHR9LV0J@fairphone.com>
On 11/13/26 9:59 AM, Luca Weiss wrote:
> On Fri Nov 13, 2026 at 9:16 AM CET, Luca Weiss wrote:
>> Since Linux has gained LCDB support now, wire up the LCDB regulators so
>> we can turn them off and on as desired.
> Actually after some more testing with extra patches, it seems that on
> FP4 the touchscreen stays dead after toggling the lcdb regulator, while
> on FP3 it works perfectly fine.
>
> So please ignore this specific patch for now, I will figure out what the
> problem is and re-submit. All the other patches in the series are still
> good to go in!
Your touchscreen needs to be a drm panel follower and/or reference the
same supplies as well :) Most modern touch controllers are part of the
same physical DDIC as the actual display side
next prev parent reply other threads:[~2026-11-13 13:09 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-13 8:16 [PATCH 0/4] Wire up LCDB regulator on Fairphone 3 & Fairphone 4 Luca Weiss
2026-11-13 8:16 ` [PATCH 1/4] arm64: defconfig: Enable Qualcomm LCDB regulator Luca Weiss
2026-11-13 8:16 ` [PATCH 2/4] arm64: dts: qcom: sdm632-fairphone-fp3: Wire up PMI632 LCDB Luca Weiss
2026-11-13 8:16 ` [PATCH 3/4] arm64: dts: qcom: pm6150l: add LCDB regulators Luca Weiss
2026-11-13 8:16 ` [PATCH 4/4] arm64: dts: qcom: sm7225-fairphone-fp4: Wire up PM6150L LCDB Luca Weiss
2026-11-13 12:59 ` Luca Weiss
2026-11-13 13:09 ` Val Packett [this message]
2026-11-13 13:27 ` Luca Weiss
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