Aw: Re: [PATCH v3 5/5] arm: dts: mt7623: add display subsystem related device nodes

[Frank Wunderlich <frank-w@public-files.de>]

Hi

Except mmsys (i added in Patch #1) all mt7623-compatibles are not defined in code and fallback (mt2701-x/mt8173-x) is used. If i add it in dt-binding, it should be added in code too, right? or should i remove mt7623 compatibles and only add documentation for new mmsys?

regards Frank


> Gesendet: Dienstag, 04. August 2020 um 17:00 Uhr
> Von: "Chun-Kuang Hu" <chunkuang.hu@kernel.org>
> An: "Frank Wunderlich" <linux@fw-web.de>
> > +       mipi_tx0: mipi-dphy@10010000 {
> > +               compatible = "mediatek,mt7623-mipi-tx",
>
> In mediatek,dsi.txt [1], "mediatek,mt7623-mipi-tx" is undefined.
>
> [1] https://www.kernel.org/doc/Documentation/devicetree/bindings/display/mediatek/mediatek%2Cdsi.txt

in drivers/gpu/drm/mediatek/mtk_mipi_tx.c only the compatible for mt2701 is defined (which is fallback in dts). So should i remove mt7623 compatible here and in the other occurences?

>
> > +                            "mediatek,mt2701-mipi-tx";

> > +
> > +       cec: cec@10012000 {
> > +               compatible = "mediatek,mt7623-cec",
>
> Please explicitly define "mediatek,mt7623-cec" in mediatek,hdmi.txt [2].
>
> [2] https://www.kernel.org/doc/Documentation/devicetree/bindings/display/mediatek/mediatek%2Chdmi.txt
>
> > +                            "mediatek,mt8173-cec";

same here...only mt8173-cec is defined in drivers/gpu/drm/mediatek/mtk_cec.c

> >         cir: cir@10013000 {
> >                 compatible = "mediatek,mt7623-cir";
> >                 reg = <0 0x10013000 0 0x1000>;
> > @@ -369,6 +393,18 @@ apmixedsys: syscon@10209000 {
> >                 #clock-cells = <1>;
> >         };
> >
> > +       hdmi_phy: phy@10209100 {
> > +               compatible = "mediatek,mt7623-hdmi-phy",
>
> Ditto.
>
> > +                            "mediatek,mt2701-hdmi-phy";
same as above (./drivers/gpu/drm/mediatek/mtk_hdmi_phy.c)

> > +       hdmiddc0: i2c@11013000 {
> > +               compatible = "mediatek,mt7623-hdmi-ddc",
>
> Ditto.
>
> > +                            "mediatek,mt8173-hdmi-ddc";
> > +               interrupts = <GIC_SPI 81 IRQ_TYPE_LEVEL_LOW>;
> > +               reg = <0 0x11013000 0 0x1C>;
> > +               clocks = <&pericfg CLK_PERI_I2C3>;
> > +               clock-names = "ddc-i2c";
> > +               status = "disabled";
> > +       };
> > +
> >         nor_flash: spi@11014000 {
> >                 compatible = "mediatek,mt7623-nor",
> >                              "mediatek,mt8173-nor";
> > @@ -766,6 +812,84 @@ mmsys: syscon@14000000 {
> >                 #clock-cells = <1>;
> >         };
> >
> > +       display_components: dispsys@14000000 {
> > +               compatible = "mediatek,mt7623-mmsys",
> > +                            "mediatek,mt2701-mmsys";
>
> In mediatek,mmsys.txt [3], this should be:
>
> mmsys: syscon@14000000 {
>         compatible = "mediatek,mt7623-mmsys", "mediatek,mt2701-mmsys", "syscon"
>
> [3] https://www.kernel.org/doc/Documentation/devicetree/bindings/arm/mediatek/mediatek%2Cmmsys.txt

as i added this in driver, i add this to documentation (and maybe remove the fallback because it results in wrong routing?)

>
> > +               reg = <0 0x14000000 0 0x1000>;
> > +               power-domains = <&scpsys MT2701_POWER_DOMAIN_DISP>;
> > +       };
> > +
> > +       ovl@14007000 {
> > +               compatible = "mediatek,mt7623-disp-ovl",
>
> This is not defined in mediatek,disp.txt [4].
>
> [4] https://www.kernel.org/doc/Documentation/devicetree/bindings/display/mediatek/mediatek%2Cdisp.txt
also not defined in drivers/gpu/drm/mediatek/mtk_drm_drv.c so again fallback used

>
> > +                            "mediatek,mt2701-disp-ovl";

> > +               reg = <0 0x14007000 0 0x1000>;
> > +               interrupts = <GIC_SPI 153 IRQ_TYPE_LEVEL_LOW>;
> > +               clocks = <&mmsys CLK_MM_DISP_OVL>;
> > +               iommus = <&iommu MT2701_M4U_PORT_DISP_OVL_0>;
> > +               mediatek,larb = <&larb0>;
> > +       };
> > +
> > +       rdma0: rdma@14008000 {
> > +               compatible = "mediatek,mt7623-disp-rdma",
> > +                            "mediatek,mt2701-disp-rdma";
> > +               reg = <0 0x14008000 0 0x1000>;
> > +               interrupts = <GIC_SPI 152 IRQ_TYPE_LEVEL_LOW>;
> > +               clocks = <&mmsys CLK_MM_DISP_RDMA>;
> > +               iommus = <&iommu MT2701_M4U_PORT_DISP_RDMA>;
> > +               mediatek,larb = <&larb0>;
> > +       };
> > +
> > +       wdma@14009000 {
> > +               compatible = "mediatek,mt7623-disp-wdma",
> > +                            "mediatek,mt2701-disp-wdma";
> > +               reg = <0 0x14009000 0 0x1000>;
> > +               interrupts = <GIC_SPI 154 IRQ_TYPE_LEVEL_LOW>;
> > +               clocks = <&mmsys CLK_MM_DISP_WDMA>;
> > +               iommus = <&iommu MT2701_M4U_PORT_DISP_WDMA>;
> > +               mediatek,larb = <&larb0>;
> > +       };
> > +
> > +       bls: pwm@1400a000 {
> > +               compatible = "mediatek,mt7623-disp-pwm",
> > +                            "mediatek,mt2701-disp-pwm";
> > +               reg = <0 0x1400a000 0 0x1000>;
> > +               #pwm-cells = <2>;
> > +               clocks = <&mmsys CLK_MM_MDP_BLS_26M>,
> > +                        <&mmsys CLK_MM_DISP_BLS>;
> > +               clock-names = "main", "mm";
> > +               status = "disabled";
> > +       };
> > +
> > +       color@1400b000 {
> > +               compatible = "mediatek,mt7623-disp-color",
> > +                            "mediatek,mt2701-disp-color";
> > +               reg = <0 0x1400b000 0 0x1000>;
> > +               interrupts = <GIC_SPI 156 IRQ_TYPE_LEVEL_LOW>;
> > +               clocks = <&mmsys CLK_MM_DISP_COLOR>;
> > +       };
> > +
> > +       dsi: dsi@1400c000 {
> > +               compatible = "mediatek,mt7623-dsi",
>
> This is not defined in mediatek,dsi.txt [1].
>
> > +                            "mediatek,mt2701-dsi";
also fallback used (drivers/gpu/drm/mediatek/mtk_drm_drv.c)


> > +       dpi0: dpi@14014000 {
> > +               compatible = "mediatek,mt7623-dpi",
>
> This is not defined in mediatek,dpi.txt [5].
>
> [5] https://www.kernel.org/doc/Documentation/devicetree/bindings/display/mediatek/mediatek%2Cdpi.txt
>
> > +                            "mediatek,mt2701-dpi";