[RFC 0/2] arm64: dts: qcom: x1e78100-t14s: Rework devicetree for LCD and OLED SKUs

[RFC 0/2] arm64: dts: qcom: x1e78100-t14s: Rework devicetree for LCD and OLED SKUs

[Abel Vesa]

The Lenovo Thinkpad T14s Gen6 comes in different SKUs when it comes to
panels. The only difference that is important is whether it is an OLED
or an LCD. The way that backlight is handled in devicetree between OLED
and LCD forces the need of two separate DTBs.

So create a common T14s dtsi that describes everything except the
backlight handling, by renaming the existent dts to dtsi. Then make the
legacy dts the LCD version, while adding a prepended oled dts. Both
include the generic T14s dtsi.

For the OLED version, I do not have HW to test it on, so OLED specific
bits will come at a later stage. Still, add the OLED dts in order to set
the stage for it.

Sending this as an RFC in order to get an agreement on the way this will
be handled from now on.

Had to format it using "git format-patch" since b4 doesn't currently
support -B when formatting the patch, and the renaming of the dts into
dtsi (plus the panel properties being dropped) would've not been visible
enough for reviewers.

Abel Vesa (2):
  arm64: dts: qcom: x1e78100-t14s: Add LCD variant with backlight
    support
  arm64: dts: qcom: x1e78100-t14s: Add OLED variant

 arch/arm64/boot/dts/qcom/Makefile             |    1 +
 .../x1e78100-lenovo-thinkpad-t14s-oled.dts    |    6 +
 .../qcom/x1e78100-lenovo-thinkpad-t14s.dts    | 1190 +----------------
 ...dts => x1e78100-lenovo-thinkpad-t14s.dtsi} |    6 +-
 4 files changed, 64 insertions(+), 1139 deletions(-)
 create mode 100644 arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s-oled.dts
 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%)

-- 
2.34.1

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

[Abel Vesa]

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%)

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>;
-- 
2.34.1

[RFC 2/2] arm64: dts: qcom: x1e78100-t14s: Add OLED variant

[Abel Vesa]

Since the Lenovo Thinkpad T14s Gen6 is available with an OLED, add
dedicated a dedicated dts for it.

This is needed because the backlight is handled differently for OLED
panels when compared to LCD ones.

Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
---
 arch/arm64/boot/dts/qcom/Makefile                           | 1 +
 .../boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s-oled.dts    | 6 ++++++
 2 files changed, 7 insertions(+)
 create mode 100644 arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s-oled.dts

diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
index b54f45b3bec8..df8d63560d06 100644
--- a/arch/arm64/boot/dts/qcom/Makefile
+++ b/arch/arm64/boot/dts/qcom/Makefile
@@ -290,6 +290,7 @@ dtb-$(CONFIG_ARCH_QCOM)	+= sm8750-mtp.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= sm8750-qrd.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= x1e001de-devkit.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= x1e78100-lenovo-thinkpad-t14s.dtb
+dtb-$(CONFIG_ARCH_QCOM)	+= x1e78100-lenovo-thinkpad-t14s-oled.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= x1e80100-asus-vivobook-s15.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= x1e80100-crd.dtb
 dtb-$(CONFIG_ARCH_QCOM)	+= x1e80100-dell-xps13-9345.dtb
diff --git a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s-oled.dts b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s-oled.dts
new file mode 100644
index 000000000000..1891f6143ec9
--- /dev/null
+++ b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s-oled.dts
@@ -0,0 +1,6 @@
+// SPDX-License-Identifier: BSD-3-Clause
+/*
+ * Copyright (c) 2025, Linaro Limited
+ */
+
+#include "x1e78100-lenovo-thinkpad-t14s.dtsi"
-- 
2.34.1

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

[Sebastian Reichel]

[-- Attachment #1: Type: text/plain, Size: 1474 bytes --]

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

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

[Abel Vesa]

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

Re: [RFC 2/2] arm64: dts: qcom: x1e78100-t14s: Add OLED variant

[Krzysztof Kozlowski]

On 06/03/2025 10:05, Abel Vesa wrote:
> diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
> index b54f45b3bec8..df8d63560d06 100644
> --- a/arch/arm64/boot/dts/qcom/Makefile
> +++ b/arch/arm64/boot/dts/qcom/Makefile
> @@ -290,6 +290,7 @@ dtb-$(CONFIG_ARCH_QCOM)	+= sm8750-mtp.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= sm8750-qrd.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= x1e001de-devkit.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= x1e78100-lenovo-thinkpad-t14s.dtb
> +dtb-$(CONFIG_ARCH_QCOM)	+= x1e78100-lenovo-thinkpad-t14s-oled.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= x1e80100-asus-vivobook-s15.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= x1e80100-crd.dtb
>  dtb-$(CONFIG_ARCH_QCOM)	+= x1e80100-dell-xps13-9345.dtb
> diff --git a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s-oled.dts b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s-oled.dts
> new file mode 100644
> index 000000000000..1891f6143ec9
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s-oled.dts
> @@ -0,0 +1,6 @@
> +// SPDX-License-Identifier: BSD-3-Clause
> +/*
> + * Copyright (c) 2025, Linaro Limited
> + */
> +
> +#include "x1e78100-lenovo-thinkpad-t14s.dtsi"


Probably you need different compatibles, e.g.
"lenovo,thinkpad-t14s-oled", "lenovo,thinkpad-t14s", "qcom,x1e78100"...

It's likely that original DTS should also get a new front compatible
"-lcd" or whatever you find useful.


Best regards,
Krzysztof

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

[Sebastian Reichel]

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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
> 
> 

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