On 9/29/25 7:05 AM, Paul Sajna wrote: > These regulators seemingly help the lcd to work better
Electronics generally work better when the required power supplies are enabled.. > > Signed-off-by: Paul Sajna <[email protected]> > --- > arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts | 17 +++++++++++++++++ > 1 file changed, 17 insertions(+) > > diff --git a/arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts > b/arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts > index > 3106fdc9b679bc6a43a1a490c61b73a63003f7e1..9c3662a3d93e124667474753e0f11d0e98698aa0 > 100644 > --- a/arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts > +++ b/arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts > @@ -48,10 +48,27 @@ zap-shader { > }; > }; > > +&ibb { > + regulator-min-microvolt = <4600000>; > + regulator-max-microvolt = <6000000>; > + regulator-over-current-protection; > + regulator-pull-down; > + regulator-soft-start; > + qcom,discharge-resistor-kohms = <300>; > +}; > + > &ipa { > firmware-name = "qcom/sdm845/lg/judyln/ipa_fws.mbn"; > }; > > +&lab { > + regulator-min-microvolt = <4600000>; > + regulator-max-microvolt = <6000000>; > + regulator-over-current-protection; > + regulator-pull-down; > + regulator-soft-start; > +}; This patch will allow any values between 4.6 V and 6.0 V to be set on your phone, with the kernel defaulting to 4.6 V at boot and staying there until (if?) any driver requests that to change. Your panel probably expects a *very* specific pair of voltages and any deviation may cause unpredictable consequences, including magic smoke if you happen to go over a certain limit. You should most likely hardcode that specific expected voltage here Konrad
