linux-kernel - Re: [PATCH v3 3/3] arm64: dts: qcom: msm8953: add MDSS

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Date:   Wed, 07 Sep 2022 17:30:30 +0200
From:   Luca Weiss <luca@...tu.xyz>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     linux-arm-msm@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        Vladimir Lypak <vladimir.lypak@...il.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/3] arm64: dts: qcom: msm8953: add MDSS

Hi Dmitry,

On Dienstag, 6. September 2022 21:41:11 CEST Dmitry Baryshkov wrote:
> On Tue, 6 Sept 2022 at 21:36, Luca Weiss <luca@...tu.xyz> wrote:
> > From: Vladimir Lypak <vladimir.lypak@...il.com>
> > 
> > Add the MDSS, MDP and DSI nodes that are found on msm8953 SoC.
> > 
> > Signed-off-by: Vladimir Lypak <vladimir.lypak@...il.com>
> > Signed-off-by: Luca Weiss <luca@...tu.xyz>
> > ---
> > Changes since v2:
> > - add "core" clock for mdss as suggested by Dmitry Baryshkov
> > 
> >  arch/arm64/boot/dts/qcom/msm8953.dtsi | 210 ++++++++++++++++++++++++++
> >  1 file changed, 210 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/qcom/msm8953.dtsi
> > b/arch/arm64/boot/dts/qcom/msm8953.dtsi index 3d11331e78d2..580333141a66
> > 100644
> > --- a/arch/arm64/boot/dts/qcom/msm8953.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/msm8953.dtsi
> > @@ -726,6 +726,216 @@ tcsr_phy_clk_scheme_sel: syscon@...f044 {
> > 
> >                         reg = <0x193f044 0x4>;
> >                 
> >                 };
> > 
> > +               mdss: mdss@...0000 {
> > +                       compatible = "qcom,mdss";
> > +
> > +                       reg = <0x1a00000 0x1000>,
> > +                             <0x1ab0000 0x1040>;
> > +                       reg-names = "mdss_phys",
> > +                                   "vbif_phys";
> > +
> > +                       power-domains = <&gcc MDSS_GDSC>;
> > +                       interrupts = <GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>;
> > +
> > +                       interrupt-controller;
> > +                       #interrupt-cells = <1>;
> > +
> > +                       clocks = <&gcc GCC_MDSS_AHB_CLK>,
> > +                                <&gcc GCC_MDSS_AXI_CLK>,
> > +                                <&gcc GCC_MDSS_VSYNC_CLK>,
> > +                                <&gcc GCC_MDSS_MDP_CLK>;
> > +                       clock-names = "iface",
> > +                                     "bus",
> > +                                     "vsync",
> > +                                     "core";
> > +
> > +                       #address-cells = <1>;
> > +                       #size-cells = <1>;
> > +                       ranges;
> > +
> > +                       status = "disabled";
> > +
> > +                       mdp: mdp@...1000 {
> > +                               compatible = "qcom,mdp5";
> 
> Could you please change this to "qcom,msm8953-mdp5", "qcom,mdp5".

This would be the first dtsi using the two compatibles then, correct? Are there 
any plans to adjust other SoCs?

> 
> > +                               reg = <0x1a01000 0x89000>;
> > +                               reg-names = "mdp_phys";
> > +
> 
> [skipped]
> 
> > +
> > +                       dsi0_phy: dsi-phy@...4400 {
> 
> Let's probably use a generic name 'phy' here and for dsi1_phy.

Here also, the bindings examples all use dsi-phy@, are there any plans to 
change that and adjust other dtsi files?

> 
> The rest looks good to me.

Thanks!

Regards
Luca

> 
> > +                               compatible = "qcom,dsi-phy-14nm-8953";
> > +                               reg = <0x1a94400 0x100>,
> > +                                     <0x1a94500 0x300>,
> > +                                     <0x1a94800 0x188>;
> > +                               reg-names = "dsi_phy",
> > +                                           "dsi_phy_lane",
> > +                                           "dsi_pll";
> > +
> > +                               #clock-cells = <1>;
> > +                               #phy-cells = <0>;
> > +
> > +                               clocks = <&gcc GCC_MDSS_AHB_CLK>,
> > <&xo_board>; +                               clock-names = "iface",
> > "ref";
> > +
> > +                               status = "disabled";
> > +                       };