diff mbox series

[RFC,1/2] arm64: dts: qcom: x1e78100-t14s: Add LCD variant with backlight support

Message ID 20250306090503.724390-2-abel.vesa@linaro.org (mailing list archive)
State Superseded
Headers show
Series arm64: dts: qcom: x1e78100-t14s: Rework devicetree for LCD and OLED SKUs | expand

Commit Message

Abel Vesa March 6, 2025, 9:05 a.m. UTC 
Due to the fact that Lenovo Thinkpad T14s Gen6 is available with both
OLED and LCD, the backlight control differs HW-wise. For the LCD variant,
the panel's backlight is controlled via one of the PWMs provided by the
PMK8550 PMIC. For the OLED variant, the backlight is internal to the
panel and therefore it is not described in devicetree.

For this reason, create a generic dtsi for the T14s by renaming the
existing dts. While at it, add a node name to panel and drop the enable
gpio and pinctrl properties from the panel node. Then add the LCD variant
dts file with the old name and describe all backlight related nodes.

So the existing dts will now be used for LCD variant while for OLED new
dts will be added.

Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
---
 .../qcom/x1e78100-lenovo-thinkpad-t14s.dts    | 1190 +----------------
 ...dts => x1e78100-lenovo-thinkpad-t14s.dtsi} |    6 +-
 2 files changed, 57 insertions(+), 1139 deletions(-)
 rewrite arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts (98%)
 copy arch/arm64/boot/dts/qcom/{x1e78100-lenovo-thinkpad-t14s.dts => x1e78100-lenovo-thinkpad-t14s.dtsi} (99%)

Comments

Sebastian Reichel March 8, 2025, 12:01 a.m. UTC | #1 
Hi,

On Thu, Mar 06, 2025 at 11:05:02AM +0200, Abel Vesa wrote:
> Due to the fact that Lenovo Thinkpad T14s Gen6 is available with both
> OLED and LCD, the backlight control differs HW-wise. For the LCD variant,
> the panel's backlight is controlled via one of the PWMs provided by the
> PMK8550 PMIC. For the OLED variant, the backlight is internal to the
> panel and therefore it is not described in devicetree.
> 
> For this reason, create a generic dtsi for the T14s by renaming the
> existing dts. While at it, add a node name to panel and drop the enable
> gpio and pinctrl properties from the panel node. Then add the LCD variant
> dts file with the old name and describe all backlight related nodes.
> 
> So the existing dts will now be used for LCD variant while for OLED new
> dts will be added.
> 
> Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
> ---
> [...]
> +	backlight: backlight {
> +		compatible = "pwm-backlight";
> +		pwms = <&pmk8550_pwm 0 5000000>;

I've tried this patch series together with the fix series [0], but
without the duty cycle calculation change [1]. Instead I changed the
period from 5000000 to 4266667. With that everything works as
expected for me.

[0] https://lore.kernel.org/all/20250305-leds-qcom-lpg-fix-max-pwm-on-hi-res-v4-0-bfe124a53a9f@linaro.org/
[1] https://lore.kernel.org/all/20250303-leds-qcom-lpg-compute-pwm-value-using-period-v1-1-833e729e3da2@linaro.org/

Greetings,

-- Sebastian
Abel Vesa March 9, 2025, 9:19 a.m. UTC | #2 
On 25-03-08 01:01:31, Sebastian Reichel wrote:
> Hi,
> 
> On Thu, Mar 06, 2025 at 11:05:02AM +0200, Abel Vesa wrote:
> > Due to the fact that Lenovo Thinkpad T14s Gen6 is available with both
> > OLED and LCD, the backlight control differs HW-wise. For the LCD variant,
> > the panel's backlight is controlled via one of the PWMs provided by the
> > PMK8550 PMIC. For the OLED variant, the backlight is internal to the
> > panel and therefore it is not described in devicetree.
> > 
> > For this reason, create a generic dtsi for the T14s by renaming the
> > existing dts. While at it, add a node name to panel and drop the enable
> > gpio and pinctrl properties from the panel node. Then add the LCD variant
> > dts file with the old name and describe all backlight related nodes.
> > 
> > So the existing dts will now be used for LCD variant while for OLED new
> > dts will be added.
> > 
> > Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
> > ---
> > [...]
> > +	backlight: backlight {
> > +		compatible = "pwm-backlight";
> > +		pwms = <&pmk8550_pwm 0 5000000>;
> 
> I've tried this patch series together with the fix series [0], but
> without the duty cycle calculation change [1]. Instead I changed the
> period from 5000000 to 4266667. With that everything works as
> expected for me.
> 
> [0] https://lore.kernel.org/all/20250305-leds-qcom-lpg-fix-max-pwm-on-hi-res-v4-0-bfe124a53a9f@linaro.org/
> [1] https://lore.kernel.org/all/20250303-leds-qcom-lpg-compute-pwm-value-using-period-v1-1-833e729e3da2@linaro.org/

Yes, I forgot to squash in the correct period.

The period should actually be 4266537. This is because the max PWM value
is actually BIT(resolution) - 1.

Will update in next version.

The [1] patch was basically NACKed by Uwe. It is not needed if we set
the period to 4266537 in DT.

> 
> Greetings,
> 
> -- Sebastian
Sebastian Reichel March 10, 2025, 12:09 a.m. UTC | #3 
Hi,

On Sun, Mar 09, 2025 at 11:19:52AM +0200, Abel Vesa wrote:
> On 25-03-08 01:01:31, Sebastian Reichel wrote:
> > Hi,
> > 
> > On Thu, Mar 06, 2025 at 11:05:02AM +0200, Abel Vesa wrote:
> > > Due to the fact that Lenovo Thinkpad T14s Gen6 is available with both
> > > OLED and LCD, the backlight control differs HW-wise. For the LCD variant,
> > > the panel's backlight is controlled via one of the PWMs provided by the
> > > PMK8550 PMIC. For the OLED variant, the backlight is internal to the
> > > panel and therefore it is not described in devicetree.
> > > 
> > > For this reason, create a generic dtsi for the T14s by renaming the
> > > existing dts. While at it, add a node name to panel and drop the enable
> > > gpio and pinctrl properties from the panel node. Then add the LCD variant
> > > dts file with the old name and describe all backlight related nodes.
> > > 
> > > So the existing dts will now be used for LCD variant while for OLED new
> > > dts will be added.
> > > 
> > > Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
> > > ---
> > > [...]
> > > +	backlight: backlight {
> > > +		compatible = "pwm-backlight";
> > > +		pwms = <&pmk8550_pwm 0 5000000>;
> > 
> > I've tried this patch series together with the fix series [0], but
> > without the duty cycle calculation change [1]. Instead I changed the
> > period from 5000000 to 4266667. With that everything works as
> > expected for me.
> > 
> > [0] https://lore.kernel.org/all/20250305-leds-qcom-lpg-fix-max-pwm-on-hi-res-v4-0-bfe124a53a9f@linaro.org/
> > [1] https://lore.kernel.org/all/20250303-leds-qcom-lpg-compute-pwm-value-using-period-v1-1-833e729e3da2@linaro.org/
> 
> Yes, I forgot to squash in the correct period.
> 
> The period should actually be 4266537. This is because the max PWM value
> is actually BIT(resolution) - 1.

For the version with 4266537:

Tested-by: Sebastian Reichel <sre@kernel.org>

-- Sebastian

> 
> Will update in next version.
> 
> The [1] patch was basically NACKed by Uwe. It is not needed if we set
> the period to 4266537 in DT.
> 
> > 
> > Greetings,
> > 
> > -- Sebastian
> 
>
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts
dissimilarity index 98%
index b2c2347f54fa..28ee6c74f2b8 100644
--- a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts
+++ b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts
@@ -1,1134 +1,56 @@ 
-// SPDX-License-Identifier: BSD-3-Clause
-/*
- * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
- * Copyright (c) 2024, Linaro Limited
- */
-
-/dts-v1/;
-
-#include <dt-bindings/gpio/gpio.h>
-#include <dt-bindings/input/gpio-keys.h>
-#include <dt-bindings/input/input.h>
-#include <dt-bindings/regulator/qcom,rpmh-regulator.h>
-
-#include "x1e80100.dtsi"
-#include "x1e80100-pmics.dtsi"
-
-/ {
-	model = "Lenovo ThinkPad T14s Gen 6";
-	compatible = "lenovo,thinkpad-t14s", "qcom,x1e78100", "qcom,x1e80100";
-	chassis-type = "laptop";
-
-	wcd938x: audio-codec {
-		compatible = "qcom,wcd9385-codec";
-
-		pinctrl-0 = <&wcd_default>;
-		pinctrl-names = "default";
-
-		qcom,micbias1-microvolt = <1800000>;
-		qcom,micbias2-microvolt = <1800000>;
-		qcom,micbias3-microvolt = <1800000>;
-		qcom,micbias4-microvolt = <1800000>;
-		qcom,mbhc-buttons-vthreshold-microvolt = <75000 150000 237000 500000 500000 500000 500000 500000>;
-		qcom,mbhc-headset-vthreshold-microvolt = <1700000>;
-		qcom,mbhc-headphone-vthreshold-microvolt = <50000>;
-		qcom,rx-device = <&wcd_rx>;
-		qcom,tx-device = <&wcd_tx>;
-
-		reset-gpios = <&tlmm 191 GPIO_ACTIVE_LOW>;
-
-		vdd-buck-supply = <&vreg_l15b_1p8>;
-		vdd-rxtx-supply = <&vreg_l15b_1p8>;
-		vdd-io-supply = <&vreg_l15b_1p8>;
-		vdd-mic-bias-supply = <&vreg_bob1>;
-
-		#sound-dai-cells = <1>;
-	};
-
-	gpio-keys {
-		compatible = "gpio-keys";
-
-		pinctrl-0 = <&hall_int_n_default>;
-		pinctrl-names = "default";
-
-		switch-lid {
-			gpios = <&tlmm 92 GPIO_ACTIVE_LOW>;
-			linux,input-type = <EV_SW>;
-			linux,code = <SW_LID>;
-			wakeup-source;
-			wakeup-event-action = <EV_ACT_DEASSERTED>;
-		};
-	};
-
-	pmic-glink {
-		compatible = "qcom,x1e80100-pmic-glink",
-			     "qcom,sm8550-pmic-glink",
-			     "qcom,pmic-glink";
-		orientation-gpios = <&tlmm 121 GPIO_ACTIVE_HIGH>,
-				    <&tlmm 123 GPIO_ACTIVE_HIGH>;
-		#address-cells = <1>;
-		#size-cells = <0>;
-
-		/* Display-adjacent port */
-		connector@0 {
-			compatible = "usb-c-connector";
-			reg = <0>;
-			power-role = "dual";
-			data-role = "dual";
-
-			ports {
-				#address-cells = <1>;
-				#size-cells = <0>;
-
-				port@0 {
-					reg = <0>;
-
-					pmic_glink_ss0_hs_in: endpoint {
-						remote-endpoint = <&usb_1_ss0_dwc3_hs>;
-					};
-				};
-
-				port@1 {
-					reg = <1>;
-
-					pmic_glink_ss0_ss_in: endpoint {
-						remote-endpoint = <&usb_1_ss0_qmpphy_out>;
-					};
-				};
-			};
-		};
-
-		/* User-adjacent port */
-		connector@1 {
-			compatible = "usb-c-connector";
-			reg = <1>;
-			power-role = "dual";
-			data-role = "dual";
-
-			ports {
-				#address-cells = <1>;
-				#size-cells = <0>;
-
-				port@0 {
-					reg = <0>;
-
-					pmic_glink_ss1_hs_in: endpoint {
-						remote-endpoint = <&usb_1_ss1_dwc3_hs>;
-					};
-				};
-
-				port@1 {
-					reg = <1>;
-
-					pmic_glink_ss1_ss_in: endpoint {
-						remote-endpoint = <&usb_1_ss1_qmpphy_out>;
-					};
-				};
-			};
-		};
-	};
-
-	reserved-memory {
-		linux,cma {
-			compatible = "shared-dma-pool";
-			size = <0x0 0x8000000>;
-			reusable;
-			linux,cma-default;
-		};
-	};
-
-	vreg_edp_3p3: regulator-edp-3p3 {
-		compatible = "regulator-fixed";
-
-		regulator-name = "VREG_EDP_3P3";
-		regulator-min-microvolt = <3300000>;
-		regulator-max-microvolt = <3300000>;
-
-		gpio = <&tlmm 70 GPIO_ACTIVE_HIGH>;
-		enable-active-high;
-
-		pinctrl-0 = <&edp_reg_en>;
-		pinctrl-names = "default";
-
-		regulator-boot-on;
-	};
-
-	vreg_nvme: regulator-nvme {
-		compatible = "regulator-fixed";
-
-		regulator-name = "VREG_NVME_3P3";
-		regulator-min-microvolt = <3300000>;
-		regulator-max-microvolt = <3300000>;
-
-		gpio = <&tlmm 18 GPIO_ACTIVE_HIGH>;
-		enable-active-high;
-
-		pinctrl-0 = <&nvme_reg_en>;
-		pinctrl-names = "default";
-
-		regulator-boot-on;
-	};
-
-	vph_pwr: regulator-vph-pwr {
-		compatible = "regulator-fixed";
-
-		regulator-name = "vph_pwr";
-		regulator-min-microvolt = <3700000>;
-		regulator-max-microvolt = <3700000>;
-
-		regulator-always-on;
-		regulator-boot-on;
-	};
-
-	sound {
-		compatible = "qcom,x1e80100-sndcard";
-		model = "X1E80100-LENOVO-Thinkpad-T14s";
-		audio-routing = "SpkrLeft IN", "WSA WSA_SPK1 OUT",
-				"SpkrRight IN", "WSA WSA_SPK2 OUT",
-				"IN1_HPHL", "HPHL_OUT",
-				"IN2_HPHR", "HPHR_OUT",
-				"AMIC2", "MIC BIAS2",
-				"VA DMIC0", "MIC BIAS1",
-				"VA DMIC1", "MIC BIAS1",
-				"VA DMIC0", "VA MIC BIAS1",
-				"VA DMIC1", "VA MIC BIAS1",
-				"TX SWR_INPUT1", "ADC2_OUTPUT";
-
-		wcd-playback-dai-link {
-			link-name = "WCD Playback";
-
-			cpu {
-				sound-dai = <&q6apmbedai RX_CODEC_DMA_RX_0>;
-			};
-
-			codec {
-				sound-dai = <&wcd938x 0>, <&swr1 0>, <&lpass_rxmacro 0>;
-			};
-
-			platform {
-				sound-dai = <&q6apm>;
-			};
-		};
-
-		wcd-capture-dai-link {
-			link-name = "WCD Capture";
-
-			cpu {
-				sound-dai = <&q6apmbedai TX_CODEC_DMA_TX_3>;
-			};
-
-			codec {
-				sound-dai = <&wcd938x 1>, <&swr2 1>, <&lpass_txmacro 0>;
-			};
-
-			platform {
-				sound-dai = <&q6apm>;
-			};
-		};
-
-		wsa-dai-link {
-			link-name = "WSA Playback";
-
-			cpu {
-				sound-dai = <&q6apmbedai WSA_CODEC_DMA_RX_0>;
-			};
-
-			codec {
-				sound-dai = <&left_spkr>, <&right_spkr>, <&swr0 0>, <&lpass_wsamacro 0>;
-			};
-
-			platform {
-				sound-dai = <&q6apm>;
-			};
-		};
-
-		va-dai-link {
-			link-name = "VA Capture";
-
-			cpu {
-				sound-dai = <&q6apmbedai VA_CODEC_DMA_TX_0>;
-			};
-
-			codec {
-				sound-dai = <&lpass_vamacro 0>;
-			};
-
-			platform {
-				sound-dai = <&q6apm>;
-			};
-		};
-	};
-};
-
-&apps_rsc {
-	regulators-0 {
-		compatible = "qcom,pm8550-rpmh-regulators";
-		qcom,pmic-id = "b";
-
-		vdd-bob1-supply = <&vph_pwr>;
-		vdd-bob2-supply = <&vph_pwr>;
-		vdd-l1-l4-l10-supply = <&vreg_s4c_1p8>;
-		vdd-l2-l13-l14-supply = <&vreg_bob1>;
-		vdd-l5-l16-supply = <&vreg_bob1>;
-		vdd-l6-l7-supply = <&vreg_bob2>;
-		vdd-l8-l9-supply = <&vreg_bob1>;
-		vdd-l12-supply = <&vreg_s5j_1p2>;
-		vdd-l15-supply = <&vreg_s4c_1p8>;
-		vdd-l17-supply = <&vreg_bob2>;
-
-		vreg_bob1: bob1 {
-			regulator-name = "vreg_bob1";
-			regulator-min-microvolt = <3008000>;
-			regulator-max-microvolt = <3960000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_bob2: bob2 {
-			regulator-name = "vreg_bob2";
-			regulator-min-microvolt = <2504000>;
-			regulator-max-microvolt = <3008000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l1b_1p8: ldo1 {
-			regulator-name = "vreg_l1b_1p8";
-			regulator-min-microvolt = <1800000>;
-			regulator-max-microvolt = <1800000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l2b_3p0: ldo2 {
-			regulator-name = "vreg_l2b_3p0";
-			regulator-min-microvolt = <3072000>;
-			regulator-max-microvolt = <3072000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l4b_1p8: ldo4 {
-			regulator-name = "vreg_l4b_1p8";
-			regulator-min-microvolt = <1800000>;
-			regulator-max-microvolt = <1800000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l6b_1p8: ldo6 {
-			regulator-name = "vreg_l6b_1p8";
-			regulator-min-microvolt = <1800000>;
-			regulator-max-microvolt = <2960000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l8b_3p0: ldo8 {
-			regulator-name = "vreg_l8b_3p0";
-			regulator-min-microvolt = <3072000>;
-			regulator-max-microvolt = <3072000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l9b_2p9: ldo9 {
-			regulator-name = "vreg_l9b_2p9";
-			regulator-min-microvolt = <2960000>;
-			regulator-max-microvolt = <2960000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l10b_1p8: ldo10 {
-			regulator-name = "vreg_l10b_1p8";
-			regulator-min-microvolt = <1800000>;
-			regulator-max-microvolt = <1800000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l12b_1p2: ldo12 {
-			regulator-name = "vreg_l12b_1p2";
-			regulator-min-microvolt = <1200000>;
-			regulator-max-microvolt = <1200000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l13b_3p0: ldo13 {
-			regulator-name = "vreg_l13b_3p0";
-			regulator-min-microvolt = <3072000>;
-			regulator-max-microvolt = <3072000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l14b_3p0: ldo14 {
-			regulator-name = "vreg_l14b_3p0";
-			regulator-min-microvolt = <3072000>;
-			regulator-max-microvolt = <3072000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l15b_1p8: ldo15 {
-			regulator-name = "vreg_l15b_1p8";
-			regulator-min-microvolt = <1800000>;
-			regulator-max-microvolt = <1800000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l17b_2p5: ldo17 {
-			regulator-name = "vreg_l17b_2p5";
-			regulator-min-microvolt = <2504000>;
-			regulator-max-microvolt = <2504000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-	};
-
-	regulators-1 {
-		compatible = "qcom,pm8550ve-rpmh-regulators";
-		qcom,pmic-id = "c";
-
-		vdd-l1-supply = <&vreg_s5j_1p2>;
-		vdd-l2-supply = <&vreg_s1f_0p7>;
-		vdd-l3-supply = <&vreg_s1f_0p7>;
-		vdd-s4-supply = <&vph_pwr>;
-
-		vreg_s4c_1p8: smps4 {
-			regulator-name = "vreg_s4c_1p8";
-			regulator-min-microvolt = <1856000>;
-			regulator-max-microvolt = <2000000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l1c_1p2: ldo1 {
-			regulator-name = "vreg_l1c_1p2";
-			regulator-min-microvolt = <1200000>;
-			regulator-max-microvolt = <1200000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l2c_0p8: ldo2 {
-			regulator-name = "vreg_l2c_0p8";
-			regulator-min-microvolt = <880000>;
-			regulator-max-microvolt = <880000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l3c_0p8: ldo3 {
-			regulator-name = "vreg_l3c_0p8";
-			regulator-min-microvolt = <912000>;
-			regulator-max-microvolt = <912000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-	};
-
-	regulators-2 {
-		compatible = "qcom,pmc8380-rpmh-regulators";
-		qcom,pmic-id = "d";
-
-		vdd-l1-supply = <&vreg_s1f_0p7>;
-		vdd-l2-supply = <&vreg_s1f_0p7>;
-		vdd-l3-supply = <&vreg_s4c_1p8>;
-		vdd-s1-supply = <&vph_pwr>;
-
-		vreg_l1d_0p8: ldo1 {
-			regulator-name = "vreg_l1d_0p8";
-			regulator-min-microvolt = <880000>;
-			regulator-max-microvolt = <880000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l2d_0p9: ldo2 {
-			regulator-name = "vreg_l2d_0p9";
-			regulator-min-microvolt = <912000>;
-			regulator-max-microvolt = <912000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l3d_1p8: ldo3 {
-			regulator-name = "vreg_l3d_1p8";
-			regulator-min-microvolt = <1800000>;
-			regulator-max-microvolt = <1800000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-	};
-
-	regulators-3 {
-		compatible = "qcom,pmc8380-rpmh-regulators";
-		qcom,pmic-id = "e";
-
-		vdd-l2-supply = <&vreg_s1f_0p7>;
-		vdd-l3-supply = <&vreg_s5j_1p2>;
-
-		vreg_l2e_0p8: ldo2 {
-			regulator-name = "vreg_l2e_0p8";
-			regulator-min-microvolt = <880000>;
-			regulator-max-microvolt = <880000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l3e_1p2: ldo3 {
-			regulator-name = "vreg_l3e_1p2";
-			regulator-min-microvolt = <1200000>;
-			regulator-max-microvolt = <1200000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-	};
-
-	regulators-4 {
-		compatible = "qcom,pmc8380-rpmh-regulators";
-		qcom,pmic-id = "f";
-
-		vdd-l1-supply = <&vreg_s5j_1p2>;
-		vdd-l2-supply = <&vreg_s5j_1p2>;
-		vdd-l3-supply = <&vreg_s5j_1p2>;
-		vdd-s1-supply = <&vph_pwr>;
-
-		vreg_s1f_0p7: smps1 {
-			regulator-name = "vreg_s1f_0p7";
-			regulator-min-microvolt = <700000>;
-			regulator-max-microvolt = <1100000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-	};
-
-	regulators-6 {
-		compatible = "qcom,pm8550ve-rpmh-regulators";
-		qcom,pmic-id = "i";
-
-		vdd-l1-supply = <&vreg_s4c_1p8>;
-		vdd-l2-supply = <&vreg_s5j_1p2>;
-		vdd-l3-supply = <&vreg_s1f_0p7>;
-		vdd-s1-supply = <&vph_pwr>;
-		vdd-s2-supply = <&vph_pwr>;
-
-		vreg_l1i_1p8: ldo1 {
-			regulator-name = "vreg_l1i_1p8";
-			regulator-min-microvolt = <1800000>;
-			regulator-max-microvolt = <1800000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l2i_1p2: ldo2 {
-			regulator-name = "vreg_l2i_1p2";
-			regulator-min-microvolt = <1200000>;
-			regulator-max-microvolt = <1200000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l3i_0p8: ldo3 {
-			regulator-name = "vreg_l3i_0p8";
-			regulator-min-microvolt = <880000>;
-			regulator-max-microvolt = <880000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-	};
-
-	regulators-7 {
-		compatible = "qcom,pm8550ve-rpmh-regulators";
-		qcom,pmic-id = "j";
-
-		vdd-l1-supply = <&vreg_s1f_0p7>;
-		vdd-l2-supply = <&vreg_s5j_1p2>;
-		vdd-l3-supply = <&vreg_s1f_0p7>;
-		vdd-s5-supply = <&vph_pwr>;
-
-		vreg_s5j_1p2: smps5 {
-			regulator-name = "vreg_s5j_1p2";
-			regulator-min-microvolt = <1256000>;
-			regulator-max-microvolt = <1304000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l1j_0p8: ldo1 {
-			regulator-name = "vreg_l1j_0p8";
-			regulator-min-microvolt = <912000>;
-			regulator-max-microvolt = <912000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l2j_1p2: ldo2 {
-			regulator-name = "vreg_l2j_1p2";
-			regulator-min-microvolt = <1256000>;
-			regulator-max-microvolt = <1256000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-
-		vreg_l3j_0p8: ldo3 {
-			regulator-name = "vreg_l3j_0p8";
-			regulator-min-microvolt = <880000>;
-			regulator-max-microvolt = <880000>;
-			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
-		};
-	};
-};
-
-&gpu {
-	status = "okay";
-
-	zap-shader {
-		firmware-name = "qcom/x1e80100/LENOVO/21N1/qcdxkmsuc8380.mbn";
-	};
-};
-
-&i2c0 {
-	clock-frequency = <400000>;
-
-	pinctrl-0 = <&qup_i2c0_data_clk>, <&tpad_default>;
-	pinctrl-names = "default";
-
-	status = "okay";
-
-	/* ELAN06E2 or ELAN06E3 */
-	touchpad@15 {
-		compatible = "hid-over-i2c";
-		reg = <0x15>;
-
-		hid-descr-addr = <0x1>;
-		interrupts-extended = <&tlmm 3 IRQ_TYPE_LEVEL_LOW>;
-
-		wakeup-source;
-	};
-
-	/* SYNA8022 or SYNA8024 */
-	touchpad@2c {
-		compatible = "hid-over-i2c";
-		reg = <0x2c>;
-
-		hid-descr-addr = <0x20>;
-		interrupts-extended = <&tlmm 3 IRQ_TYPE_LEVEL_LOW>;
-
-		wakeup-source;
-	};
-
-	/* ELAN06F1 or SYNA06F2 */
-	keyboard@3a {
-		compatible = "hid-over-i2c";
-		reg = <0x3a>;
-
-		hid-descr-addr = <0x1>;
-		interrupts-extended = <&tlmm 67 IRQ_TYPE_LEVEL_LOW>;
-
-		pinctrl-0 = <&kybd_default>;
-		pinctrl-names = "default";
-
-		wakeup-source;
-	};
-};
-
-&i2c5 {
-	clock-frequency = <400000>;
-
-	status = "okay";
-
-	eusb5_repeater: redriver@43 {
-		compatible = "nxp,ptn3222";
-		reg = <0x43>;
-		#phy-cells = <0>;
-
-		vdd3v3-supply = <&vreg_l13b_3p0>;
-		vdd1v8-supply = <&vreg_l4b_1p8>;
-
-		reset-gpios = <&tlmm 7 GPIO_ACTIVE_LOW>;
-
-		pinctrl-0 = <&eusb5_reset_n>;
-		pinctrl-names = "default";
-	};
-
-	eusb3_repeater: redriver@47 {
-		compatible = "nxp,ptn3222";
-		reg = <0x47>;
-		#phy-cells = <0>;
-
-		vdd3v3-supply = <&vreg_l13b_3p0>;
-		vdd1v8-supply = <&vreg_l4b_1p8>;
-
-		reset-gpios = <&tlmm 6 GPIO_ACTIVE_LOW>;
-
-		pinctrl-0 = <&eusb3_reset_n>;
-		pinctrl-names = "default";
-	};
-
-	eusb6_repeater: redriver@4f {
-		compatible = "nxp,ptn3222";
-		reg = <0x4f>;
-		#phy-cells = <0>;
-
-		vdd3v3-supply = <&vreg_l13b_3p0>;
-		vdd1v8-supply = <&vreg_l4b_1p8>;
-
-		reset-gpios = <&tlmm 184 GPIO_ACTIVE_LOW>;
-
-		pinctrl-0 = <&eusb6_reset_n>;
-		pinctrl-names = "default";
-	};
-};
-
-&i2c8 {
-	clock-frequency = <400000>;
-
-	status = "okay";
-
-	/* ILIT2911 or GTCH1563 */
-	touchscreen@10 {
-		compatible = "hid-over-i2c";
-		reg = <0x10>;
-
-		hid-descr-addr = <0x1>;
-		interrupts-extended = <&tlmm 51 IRQ_TYPE_LEVEL_LOW>;
-
-		pinctrl-0 = <&ts0_default>;
-		pinctrl-names = "default";
-	};
-
-	/* TODO: second-sourced touchscreen @ 0x41 */
-};
-
-&lpass_tlmm {
-	spkr_01_sd_n_active: spkr-01-sd-n-active-state {
-		pins = "gpio12";
-		function = "gpio";
-		drive-strength = <16>;
-		bias-disable;
-		output-low;
-	};
-};
-
-&lpass_vamacro {
-	pinctrl-0 = <&dmic01_default>;
-	pinctrl-names = "default";
-
-	vdd-micb-supply = <&vreg_l1b_1p8>;
-	qcom,dmic-sample-rate = <4800000>;
-};
-
-&mdss {
-	status = "okay";
-};
-
-&mdss_dp3 {
-	compatible = "qcom,x1e80100-dp";
-	/delete-property/ #sound-dai-cells;
-
-	status = "okay";
-
-	aux-bus {
-		panel {
-			compatible = "edp-panel";
-			enable-gpios = <&pmc8380_3_gpios 4 GPIO_ACTIVE_HIGH>;
-			power-supply = <&vreg_edp_3p3>;
-
-			pinctrl-0 = <&edp_bl_en>;
-			pinctrl-names = "default";
-
-			port {
-				edp_panel_in: endpoint {
-					remote-endpoint = <&mdss_dp3_out>;
-				};
-			};
-		};
-	};
-
-	ports {
-		port@1 {
-			reg = <1>;
-
-			mdss_dp3_out: endpoint {
-				data-lanes = <0 1 2 3>;
-				link-frequencies = /bits/ 64 <1620000000 2700000000 5400000000 8100000000>;
-
-				remote-endpoint = <&edp_panel_in>;
-			};
-		};
-	};
-};
-
-&mdss_dp3_phy {
-	vdda-phy-supply = <&vreg_l3j_0p8>;
-	vdda-pll-supply = <&vreg_l2j_1p2>;
-
-	status = "okay";
-};
-
-&pcie4 {
-	perst-gpios = <&tlmm 146 GPIO_ACTIVE_LOW>;
-	wake-gpios = <&tlmm 148 GPIO_ACTIVE_LOW>;
-
-	pinctrl-0 = <&pcie4_default>;
-	pinctrl-names = "default";
-
-	status = "okay";
-};
-
-&pcie4_phy {
-	vdda-phy-supply = <&vreg_l3i_0p8>;
-	vdda-pll-supply = <&vreg_l3e_1p2>;
-
-	status = "okay";
-};
-
-&pcie6a {
-	perst-gpios = <&tlmm 152 GPIO_ACTIVE_LOW>;
-	wake-gpios = <&tlmm 154 GPIO_ACTIVE_LOW>;
-
-	vddpe-3v3-supply = <&vreg_nvme>;
-
-	pinctrl-0 = <&pcie6a_default>;
-	pinctrl-names = "default";
-
-	status = "okay";
-};
-
-&pcie6a_phy {
-	vdda-phy-supply = <&vreg_l1d_0p8>;
-	vdda-pll-supply = <&vreg_l2j_1p2>;
-
-	status = "okay";
-};
-
-&pmc8380_3_gpios {
-	edp_bl_en: edp-bl-en-state {
-		pins = "gpio4";
-		function = "normal";
-		power-source = <1>;
-		input-disable;
-		output-enable;
-	};
-};
-
-&qupv3_0 {
-	status = "okay";
-};
-
-&qupv3_1 {
-	status = "okay";
-};
-
-&qupv3_2 {
-	status = "okay";
-};
-
-&remoteproc_adsp {
-	firmware-name = "qcom/x1e80100/LENOVO/21N1/qcadsp8380.mbn",
-			"qcom/x1e80100/LENOVO/21N1/adsp_dtbs.elf";
-
-	status = "okay";
-};
-
-&remoteproc_cdsp {
-	firmware-name = "qcom/x1e80100/LENOVO/21N1/qccdsp8380.mbn",
-			"qcom/x1e80100/LENOVO/21N1/cdsp_dtbs.elf";
-
-	status = "okay";
-};
-
-&smb2360_0 {
-	status = "okay";
-};
-
-&smb2360_0_eusb2_repeater {
-	vdd18-supply = <&vreg_l3d_1p8>;
-	vdd3-supply = <&vreg_l2b_3p0>;
-};
-
-&smb2360_1 {
-	status = "okay";
-};
-
-&smb2360_1_eusb2_repeater {
-	vdd18-supply = <&vreg_l3d_1p8>;
-	vdd3-supply = <&vreg_l14b_3p0>;
-};
-
-&swr0 {
-	status = "okay";
-
-	pinctrl-0 = <&wsa_swr_active>, <&spkr_01_sd_n_active>;
-	pinctrl-names = "default";
-
-	/* WSA8845, Left Speaker */
-	left_spkr: speaker@0,0 {
-		compatible = "sdw20217020400";
-		reg = <0 0>;
-		reset-gpios = <&lpass_tlmm 12 GPIO_ACTIVE_LOW>;
-		#sound-dai-cells = <0>;
-		sound-name-prefix = "SpkrLeft";
-		vdd-1p8-supply = <&vreg_l15b_1p8>;
-		vdd-io-supply = <&vreg_l12b_1p2>;
-		qcom,port-mapping = <1 2 3 7 10 13>;
-	};
-
-	/* WSA8845, Right Speaker */
-	right_spkr: speaker@0,1 {
-		compatible = "sdw20217020400";
-		reg = <0 1>;
-		reset-gpios = <&lpass_tlmm 12 GPIO_ACTIVE_LOW>;
-		#sound-dai-cells = <0>;
-		sound-name-prefix = "SpkrRight";
-		vdd-1p8-supply = <&vreg_l15b_1p8>;
-		vdd-io-supply = <&vreg_l12b_1p2>;
-		qcom,port-mapping = <4 5 6 7 11 13>;
-	};
-};
-
-&swr1 {
-	status = "okay";
-
-	/* WCD9385 RX */
-	wcd_rx: codec@0,4 {
-		compatible = "sdw20217010d00";
-		reg = <0 4>;
-		qcom,rx-port-mapping = <1 2 3 4 5>;
-	};
-};
-
-&swr2 {
-	status = "okay";
-
-	/* WCD9385 TX */
-	wcd_tx: codec@0,3 {
-		compatible = "sdw20217010d00";
-		reg = <0 3>;
-		qcom,tx-port-mapping = <2 2 3 4>;
-	};
-};
-
-&tlmm {
-	gpio-reserved-ranges = <34 2>, /* Unused */
-			       <44 4>, /* SPI (TPM) */
-			       <72 2>, /* Secure EC I2C connection (?) */
-			       <238 1>; /* UFS Reset */
-
-	eusb3_reset_n: eusb3-reset-n-state {
-		pins = "gpio6";
-		function = "gpio";
-		drive-strength = <2>;
-		bias-disable;
-		output-low;
-	};
-
-	eusb5_reset_n: eusb5-reset-n-state {
-		pins = "gpio7";
-		function = "gpio";
-		drive-strength = <2>;
-		bias-disable;
-		output-low;
-	};
-
-	eusb6_reset_n: eusb6-reset-n-state {
-		pins = "gpio184";
-		function = "gpio";
-		drive-strength = <2>;
-		bias-disable;
-		output-low;
-	};
-
-	tpad_default: tpad-default-state {
-		pins = "gpio3";
-		function = "gpio";
-		bias-pull-up;
-	};
-
-	nvme_reg_en: nvme-reg-en-state {
-		pins = "gpio18";
-		function = "gpio";
-		drive-strength = <2>;
-		bias-disable;
-	};
-
-	ts0_default: ts0-default-state {
-		reset-n-pins {
-			pins = "gpio48";
-			function = "gpio";
-			output-high;
-			drive-strength = <16>;
-		};
-
-		int-n-pins {
-			pins = "gpio51";
-			function = "gpio";
-			bias-disable;
-		};
-	};
-
-	kybd_default: kybd-default-state {
-		pins = "gpio67";
-		function = "gpio";
-		bias-disable;
-	};
-
-	edp_reg_en: edp-reg-en-state {
-		pins = "gpio70";
-		function = "gpio";
-		drive-strength = <16>;
-		bias-disable;
-	};
-
-	hall_int_n_default: hall-int-n-state {
-		pins = "gpio92";
-		function = "gpio";
-		bias-disable;
-	};
-
-	pcie4_default: pcie4-default-state {
-		clkreq-n-pins {
-			pins = "gpio147";
-			function = "pcie4_clk";
-			drive-strength = <2>;
-			bias-pull-up;
-		};
-
-		perst-n-pins {
-			pins = "gpio146";
-			function = "gpio";
-			drive-strength = <2>;
-			bias-disable;
-		};
-
-		wake-n-pins {
-			pins = "gpio148";
-			function = "gpio";
-			drive-strength = <2>;
-			bias-pull-up;
-		};
-	};
-
-	pcie6a_default: pcie6a-default-state {
-		clkreq-n-pins {
-			pins = "gpio153";
-			function = "pcie6a_clk";
-			drive-strength = <2>;
-			bias-pull-up;
-		};
-
-		perst-n-pins {
-			pins = "gpio152";
-			function = "gpio";
-			drive-strength = <2>;
-			bias-disable;
-		};
-
-		wake-n-pins {
-			pins = "gpio154";
-			function = "gpio";
-			drive-strength = <2>;
-			bias-pull-up;
-		};
-	};
-
-	wcd_default: wcd-reset-n-active-state {
-		pins = "gpio191";
-		function = "gpio";
-		drive-strength = <16>;
-		bias-disable;
-		output-low;
-	};
-};
-
-&usb_1_ss0_hsphy {
-	vdd-supply = <&vreg_l3j_0p8>;
-	vdda12-supply = <&vreg_l2j_1p2>;
-
-	phys = <&smb2360_0_eusb2_repeater>;
-
-	status = "okay";
-};
-
-&usb_1_ss0_qmpphy {
-	vdda-phy-supply = <&vreg_l2j_1p2>;
-	vdda-pll-supply = <&vreg_l1j_0p8>;
-
-	status = "okay";
-};
-
-&usb_1_ss0 {
-	status = "okay";
-};
-
-&usb_1_ss0_dwc3 {
-	dr_mode = "host";
-};
-
-&usb_1_ss0_dwc3_hs {
-	remote-endpoint = <&pmic_glink_ss0_hs_in>;
-};
-
-&usb_1_ss0_qmpphy_out {
-	remote-endpoint = <&pmic_glink_ss0_ss_in>;
-};
-
-&usb_1_ss1_hsphy {
-	vdd-supply = <&vreg_l3j_0p8>;
-	vdda12-supply = <&vreg_l2j_1p2>;
-
-	phys = <&smb2360_1_eusb2_repeater>;
-
-	status = "okay";
-};
-
-&usb_1_ss1_qmpphy {
-	vdda-phy-supply = <&vreg_l2j_1p2>;
-	vdda-pll-supply = <&vreg_l2d_0p9>;
-
-	status = "okay";
-};
-
-&usb_1_ss1 {
-	status = "okay";
-};
-
-&usb_1_ss1_dwc3 {
-	dr_mode = "host";
-};
-
-&usb_1_ss1_dwc3_hs {
-	remote-endpoint = <&pmic_glink_ss1_hs_in>;
-};
-
-&usb_1_ss1_qmpphy_out {
-	remote-endpoint = <&pmic_glink_ss1_ss_in>;
-};
-
-&usb_2 {
-	status = "okay";
-};
-
-&usb_2_dwc3 {
-	dr_mode = "host";
-};
-
-&usb_2_hsphy {
-	vdd-supply = <&vreg_l2e_0p8>;
-	vdda12-supply = <&vreg_l3e_1p2>;
-
-	phys = <&eusb5_repeater>;
-
-	status = "okay";
-};
-
-&usb_mp {
-	status = "okay";
-};
-
-&usb_mp_hsphy0 {
-	vdd-supply = <&vreg_l2e_0p8>;
-	vdda12-supply = <&vreg_l3e_1p2>;
-
-	phys = <&eusb6_repeater>;
-
-	status = "okay";
-};
-
-&usb_mp_hsphy1 {
-	vdd-supply = <&vreg_l2e_0p8>;
-	vdda12-supply = <&vreg_l3e_1p2>;
-
-	phys = <&eusb3_repeater>;
-
-	status = "okay";
-};
-
-&usb_mp_qmpphy0 {
-	vdda-phy-supply = <&vreg_l3e_1p2>;
-	vdda-pll-supply = <&vreg_l3c_0p8>;
-
-	status = "okay";
-};
-
-&usb_mp_qmpphy1 {
-	vdda-phy-supply = <&vreg_l3e_1p2>;
-	vdda-pll-supply = <&vreg_l3c_0p8>;
-
-	status = "okay";
-};
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) 2025, Linaro Limited
+ */
+
+#include "x1e78100-lenovo-thinkpad-t14s.dtsi"
+
+/ {
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pmk8550_pwm 0 5000000>;
+		enable-gpios = <&pmc8380_3_gpios 4 GPIO_ACTIVE_HIGH>;
+		power-supply = <&vreg_edp_bl>;
+
+		pinctrl-0 = <&edp_bl_en>, <&edp_bl_pwm>;
+		pinctrl-names = "default";
+	};
+
+	vreg_edp_bl: regulator-edp-bl {
+		compatible = "regulator-fixed";
+
+		regulator-name = "VBL9";
+		regulator-min-microvolt = <3600000>;
+		regulator-max-microvolt = <3600000>;
+
+		gpio = <&pmc8380_3_gpios 10 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&edp_bl_reg_en>;
+
+		regulator-boot-on;
+	};
+};
+
+&panel {
+	backlight = <&backlight>;
+};
+
+&pmc8380_3_gpios {
+	edp_bl_reg_en: edp-bl-reg-en-state {
+		pins = "gpio10";
+		function = "normal";
+	};
+};
+
+&pmk8550_gpios {
+	edp_bl_pwm: edp-bl-pwm-state {
+		pins = "gpio5";
+		function = "func3";
+	};
+};
+
+&pmk8550_pwm {
+	status = "okay";
+};
diff --git a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
similarity index 99%
copy from arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts
copy to arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
index b2c2347f54fa..802c50f78436 100644
--- a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts
+++ b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dtsi
@@ -704,14 +704,10 @@  &mdss_dp3 {
 	status = "okay";
 
 	aux-bus {
-		panel {
+		panel: panel {
 			compatible = "edp-panel";
-			enable-gpios = <&pmc8380_3_gpios 4 GPIO_ACTIVE_HIGH>;
 			power-supply = <&vreg_edp_3p3>;
 
-			pinctrl-0 = <&edp_bl_en>;
-			pinctrl-names = "default";
-
 			port {
 				edp_panel_in: endpoint {
 					remote-endpoint = <&mdss_dp3_out>;