linux-kernel - Re: [PATCH 3/3] arm64: dts: qcom: Add X1E78100 ThinkPad T14s Gen 6

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Message-ID: <Zp4vghH5SK/rLEce@linaro.org>
Date: Mon, 22 Jul 2024 13:08:02 +0300
From: Abel Vesa <abel.vesa@...aro.org>
To: Konrad Dybcio <konrad.dybcio@...aro.org>
Cc: Bjorn Andersson <andersson@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Marijn Suijten <marijn.suijten@...ainline.org>,
	linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, Johan Hovold <johan@...nel.org>
Subject: Re: [PATCH 3/3] arm64: dts: qcom: Add X1E78100 ThinkPad T14s Gen 6

On 24-07-22 10:42:57, Konrad Dybcio wrote:
> On 21.07.2024 6:40 PM, Abel Vesa wrote:
> > On 24-07-19 22:16:38, Konrad Dybcio wrote:
> >> Add support for the aforementioned laptop. That includes:
> >>
> >> - input methods, incl. lid switch (keyboard needs the pdc
> >>   wakeup-parent removal hack..)
> >> - NVMe, WiFi
> >> - USB-C ports
> >> - GPU, display
> >> - DSPs
> >>
> >> Notably, the USB-A ports on the side are depenedent on the USB
> >> multiport controller making it upstream.
> >>
> >> At least one of the eDP panels used (non-touchscreen) identifies as
> >> BOE 0x0b66.
> >>
> >> See below for the hardware description from the OEM.
> >>
> >> Link: https://www.lenovo.com/us/en/p/laptops/thinkpad/thinkpadt/lenovo-thinkpad-t14s-gen-6-(14-inch-snapdragon)/len101t0099
> >> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> > 
> > Few comments below. Otherwise, LGTM.
> > 
> > Reviewed-by: Abel Vesa <abel.vesa@...aro.org>
> > 
> >> ---
> >>  arch/arm64/boot/dts/qcom/Makefile                  |   1 +
> >>  .../dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts     | 792 +++++++++++++++++++++
> >>  2 files changed, 793 insertions(+)
> >>
> >> diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
> >> index 0e5c810304fb..734a05e04c4a 100644
> >> --- a/arch/arm64/boot/dts/qcom/Makefile
> >> +++ b/arch/arm64/boot/dts/qcom/Makefile
> >> @@ -261,6 +261,7 @@ dtb-$(CONFIG_ARCH_QCOM)	+= sm8650-hdk-display-card.dtb
> >>  dtb-$(CONFIG_ARCH_QCOM)	+= sm8650-hdk.dtb
> >>  dtb-$(CONFIG_ARCH_QCOM)	+= sm8650-mtp.dtb
> >>  dtb-$(CONFIG_ARCH_QCOM)	+= sm8650-qrd.dtb
> >> +dtb-$(CONFIG_ARCH_QCOM)	+= x1e78100-lenovo-thinkpad-t14s.dtb
> >>  dtb-$(CONFIG_ARCH_QCOM)	+= x1e80100-asus-vivobook-s15.dtb
> >>  dtb-$(CONFIG_ARCH_QCOM)	+= x1e80100-crd.dtb
> >>  dtb-$(CONFIG_ARCH_QCOM)	+= x1e80100-lenovo-yoga-slim7x.dtb
> >> diff --git a/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts b/arch/arm64/boot/dts/qcom/x1e78100-lenovo-thinkpad-t14s.dts
> > 
> > So what happens for SKUs of this model wil have x1e80100 ?
> > 
> > Maybe we should stick to x1e80100 ?
> 
> This one only ships with 78100
> 

Sure, but then in upstream we only have 80100. Plus, it is included in
this file as well.

I don't know what's the right thing to do here. But I think it keeps
things more simple if we keep everything under the x1e80100 umbrella.

> [...]
> 
> >> +	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-always-on;
> > 
> > Drop this.
> 
> Oops!
> 
> [...]
> 
> >> +
> >> +	edp_reg_en: edp-reg-en-state {
> >> +		pins = "gpio70";
> >> +		function = "gpio";
> >> +		drive-strength = <16>;
> >> +		bias-pull-up;
> > 
> > bias-disable, maybe ?
> 
> Yeah, probably
> 
> Konrad
>