These regulators are required for the LCD

Signed-off-by: Paul Sajna <sajattack@postmarketos.org>
---
 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 a61f7bd65a7a..3188334d269b 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts
+++ b/arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts
@@ -56,10 +56,27 @@ 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;
+};
+
 &mdss {
 	status = "okay";
 };

-- 
2.52.0

On 11/25/25 9:12 AM, Paul Sajna wrote:
> These regulators are required for the LCD
> 
> Signed-off-by: Paul Sajna <sajattack@postmarketos.org>
> ---
>  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 a61f7bd65a7a..3188334d269b 100644
> --- a/arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts
> +++ b/arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts
> @@ -56,10 +56,27 @@ zap-shader {
>  	};
>  };
>  
> +&ibb {
> +	regulator-min-microvolt = <4600000>;
> +	regulator-max-microvolt = <6000000>;

Sorry for not responding earlier, you can retrieve the actual volt
numbers from the hardware by reading

PMI8998_IBB_REG_BASE + REG_LABIBB_VOLTAGE = 0xdc41

ibb_uV = 1.4 + .1 * val

PMI8998_LAB_REG_BASE + REG_LABIBB_VOLTAGE = 0xde41

lab_uV = 4.6 + .1 * val

Konrad

December 1, 2025 at 12:38 PM, "Konrad Dybcio" <konrad.dybcio@oss.qualcomm.com mailto:konrad.dybcio@oss.qualcomm.com?to=%22Konrad%20Dybcio%22%20%3Ckonrad.dybcio%40oss.qualcomm.com%3E > wrote:

> Sorry for not responding earlier, you can retrieve the actual volt
> numbers from the hardware by reading
> 
> PMI8998_IBB_REG_BASE + REG_LABIBB_VOLTAGE = 0xdc41
> 
> ibb_uV = 1.4 + .1 * val
> 
> PMI8998_LAB_REG_BASE + REG_LABIBB_VOLTAGE = 0xde41
> 
> lab_uV = 4.6 + .1 * val
> 
> Konrad
>

I found it in sysfs along the lines of your previous suggestion instead.

```
1|judyln:/ # cat /sys/kernel/debug/regulator/c440000.qcom,spmi:qcom,pmi8998@3:qpnp-labibb-regulator-ibb_reg/voltage
5500000
judyln:/ # cat /sys/kernel/debug/regulator/c440000.qcom,spmi:qcom,pmi8998@3:qpnp-labibb-regulator-lab_reg/voltage
5500000
```

On 12/2/25 5:21 AM, Paul Sajna wrote:
> December 1, 2025 at 12:38 PM, "Konrad Dybcio" <konrad.dybcio@oss.qualcomm.com mailto:konrad.dybcio@oss.qualcomm.com?to=%22Konrad%20Dybcio%22%20%3Ckonrad.dybcio%40oss.qualcomm.com%3E > wrote:
> 
>> Sorry for not responding earlier, you can retrieve the actual volt
>> numbers from the hardware by reading
>>
>> PMI8998_IBB_REG_BASE + REG_LABIBB_VOLTAGE = 0xdc41
>>
>> ibb_uV = 1.4 + .1 * val
>>
>> PMI8998_LAB_REG_BASE + REG_LABIBB_VOLTAGE = 0xde41
>>
>> lab_uV = 4.6 + .1 * val
>>
>> Konrad
>>
> 
> I found it in sysfs along the lines of your previous suggestion instead.
> 
> ```
> 1|judyln:/ # cat /sys/kernel/debug/regulator/c440000.qcom,spmi:qcom,pmi8998@3:qpnp-labibb-regulator-ibb_reg/voltage
> 5500000
> judyln:/ # cat /sys/kernel/debug/regulator/c440000.qcom,spmi:qcom,pmi8998@3:qpnp-labibb-regulator-lab_reg/voltage
> 5500000
> ```

That works too

Konrad