linux-kernel - Re: [PATCH v5 11/12] arm64: dts: qcom: sc8280xp-crd: Enable EDP

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Message-ID: <20221213151012.GB16520@core-thresher1.qualcomm.com>
Date:   Tue, 13 Dec 2022 07:10:14 -0800
From:   Bjorn Andersson <quic_bjorande@...cinc.com>
To:     Johan Hovold <johan@...nel.org>
CC:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Kalyan Thota <quic_kalyant@...cinc.com>,
        Jessica Zhang <quic_jesszhan@...cinc.com>,
        "Kuogee Hsieh" <quic_khsieh@...cinc.com>,
        Johan Hovold <johan+linaro@...nel.org>,
        Sankeerth Billakanti <quic_sbillaka@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <freedreno@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 11/12] arm64: dts: qcom: sc8280xp-crd: Enable EDP

On Fri, Dec 09, 2022 at 11:35:23AM +0100, Johan Hovold wrote:
> On Wed, Dec 07, 2022 at 02:00:11PM -0800, Bjorn Andersson wrote:
> > From: Bjorn Andersson <bjorn.andersson@...aro.org>
> > 
> > The SC8280XP CRD has a EDP display on MDSS0 DP3, enable relevant nodes
> > and link it together with the backlight control.
> > 
> > Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> > Signed-off-by: Bjorn Andersson <quic_bjorande@...cinc.com>
> > ---
> > 
> > Changes since v4:
> > - None
> > 
> >  arch/arm64/boot/dts/qcom/sc8280xp-crd.dts | 72 ++++++++++++++++++++++-
> >  1 file changed, 71 insertions(+), 1 deletion(-)
> > 
> > diff --git a/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts b/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
> > index f09810e3d956..a7d2384cbbe8 100644
> > --- a/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
> > +++ b/arch/arm64/boot/dts/qcom/sc8280xp-crd.dts
> > @@ -20,7 +20,7 @@ aliases {
> >  		serial0 = &qup2_uart17;
> >  	};
> >  
> > -	backlight {
> > +	backlight: backlight {
> >  		compatible = "pwm-backlight";
> >  		pwms = <&pmc8280c_lpg 3 1000000>;
> >  		enable-gpios = <&pmc8280_1_gpios 8 GPIO_ACTIVE_HIGH>;
> > @@ -34,6 +34,22 @@ chosen {
> >  		stdout-path = "serial0:115200n8";
> >  	};
> >  
> > +	vreg_edp_3p3: regulator-edp-3p3 {
> > +		compatible = "regulator-fixed";
> > +
> > +		regulator-name = "VREG_EDP_3P3";
> 
> Please use the net name from the schematics here (i.e. "VCC3LCD").
> 

This is the name used in the CRD schematics.

> > +		regulator-min-microvolt = <3300000>;
> > +		regulator-max-microvolt = <3300000>;
> > +
> > +		gpio = <&tlmm 25 GPIO_ACTIVE_HIGH>;
> > +		enable-active-high;
> > +
> > +		pinctrl-names = "default";
> > +		pinctrl-0 = <&edp_reg_en>;
> > +
> > +		regulator-boot-on;
> > +	};
> > +
> >  	vreg_edp_bl: regulator-edp-bl {
> >  		compatible = "regulator-fixed";
> >  
> > @@ -230,6 +246,54 @@ vreg_l9d: ldo9 {
> >  	};
> >  };
> >  
> > +&dispcc0 {
> > +	status = "okay";
> > +};
> > +
> > +&mdss0 {
> > +	status = "okay";
> > +};
> > +
> > +&mdss0_dp3 {
> > +	compatible = "qcom,sc8280xp-edp";
> > +	status = "okay";
> 
> Please move the status property last (i.e. after data-lanes).
> 

Sorry for missing that.

> > +
> > +	data-lanes = <0 1 2 3>;
> > +
> > +	aux-bus {
> > +		panel {
> > +			compatible = "edp-panel";
> > +			power-supply = <&vreg_edp_3p3>;
> > +
> > +			backlight = <&backlight>;
> > +
> > +			ports {
> > +				port {
> > +					edp_panel_in: endpoint {
> > +						remote-endpoint = <&mdss0_dp3_out>;
> > +					};
> > +				};
> > +			};
> > +		};
> > +	};
> > +
> > +	ports {
> > +		port@1 {
> > +			reg = <1>;
> > +			mdss0_dp3_out: endpoint {
> > +				remote-endpoint = <&edp_panel_in>;
> > +			};
> > +		};
> > +	};
> > +};
> > +
> > +&mdss0_dp3_phy {
> > +	status = "okay";
> 
> Same here.
> 

Ditto.

> > +
> > +	vdda-phy-supply = <&vreg_l6b>;
> > +	vdda-pll-supply = <&vreg_l3b>;
> > +};
> > +
> >  &pcie2a {
> >  	perst-gpios = <&tlmm 143 GPIO_ACTIVE_LOW>;
> >  	wake-gpios = <&tlmm 145 GPIO_ACTIVE_LOW>;
> > @@ -496,6 +560,12 @@ hastings_reg_en: hastings-reg-en-state {
> >  &tlmm {
> >  	gpio-reserved-ranges = <74 6>, <83 4>, <125 2>, <128 2>, <154 7>;
> >  
> > +	edp_reg_en: edp-reg-en-state {
> > +		pins = "gpio25";
> > +		function = "gpio";
> > +		output-enable;
> 
> 'output-enable' is not valid for tlmm and causes the settings to be
> rejected:
> 
> 	sc8280xp-tlmm f100000.pinctrl: pin_config_group_set op failed for group 25
> 	reg-fixed-voltage regulator-edp-3p3: Error applying setting, reverse things back
> 

Thanks for spotting that, it doesn't seem to be needed for the gpio-regulator
driver anyways...

Regards,
Bjorn

> > +	};
> > +
> >  	kybd_default: kybd-default-state {
> >  		disable-pins {
> >  			pins = "gpio102";
> 
> Johan