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

From: Ryder Lee
Date: Tue Sep 25 2018 - 22:38:32 EST


On Wed, 2018-09-26 at 09:37 +0800, CK Hu wrote:
> Hi, Ryder:
>
> On Wed, 2018-09-05 at 22:09 +0800, Ryder Lee wrote:
> > Add display subsystem related device nodes for MT7623.
> >
> > Cc: CK Hu <ck.hu@xxxxxxxxxxxx>
> > Signed-off-by: chunhui dai <chunhui.dai@xxxxxxxxxxxx>
> > Signed-off-by: Bibby Hsieh <bibby.hsieh@xxxxxxxxxxxx>
> > Signed-off-by: Ryder Lee <ryder.lee@xxxxxxxxxxxx>
> > ---
> > I forgot to sort nodes in my previous mail. Sorry for the inconvenience.
> >
> > This patch depends on the series: https://lkml.org/lkml/2018/9/5/223
> >
> > @Matthias,
> > I know you're working on broken MMSYS - just want to ask whether it's possible
> > to let the patch to go to your tree (if others are okay with it), and send a
> > fixup one for MT7623 MMSYS later?
> > ---
> > arch/arm/boot/dts/mt7623.dtsi | 177 ++++++++++++++++++++++++++
> > arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts | 83 ++++++++++++
> > arch/arm/boot/dts/mt7623n-rfb-emmc.dts | 83 ++++++++++++
> > 3 files changed, 343 insertions(+)
> >
> > diff --git a/arch/arm/boot/dts/mt7623.dtsi b/arch/arm/boot/dts/mt7623.dtsi
> > index d01bdee..fdf9078 100644
> > --- a/arch/arm/boot/dts/mt7623.dtsi
> > +++ b/arch/arm/boot/dts/mt7623.dtsi
> > @@ -23,6 +23,11 @@
> > #address-cells = <2>;
> > #size-cells = <2>;
> >
> > + aliases {
> > + rdma0 = &rdma0;
> > + rdma1 = &rdma1;
> > + };
> > +
> > cpu_opp_table: opp-table {
> > compatible = "operating-points-v2";
> > opp-shared;
> > @@ -311,6 +316,25 @@
> > clock-names = "spi", "wrap";
> > };
> >
> > + mipi_tx0: mipi-dphy@10010000 {
> > + compatible = "mediatek,mt7623-mipi-tx",
> > + "mediatek,mt2701-mipi-tx";
> > + reg = <0 0x10010000 0 0x90>;
> > + clocks = <&clk26m>;
> > + clock-output-names = "mipi_tx0_pll";
> > + #clock-cells = <0>;
> > + #phy-cells = <0>;
> > + };
> > +
> > + cec: cec@10012000 {
> > + compatible = "mediatek,mt7623-cec",
> > + "mediatek,mt8173-cec";
> > + reg = <0 0x10012000 0 0xbc>;
> > + interrupts = <GIC_SPI 182 IRQ_TYPE_LEVEL_LOW>;
> > + clocks = <&infracfg CLK_INFRA_CEC>;
> > + status = "disabled";
> > + };
> > +
> > cir: cir@10013000 {
> > compatible = "mediatek,mt7623-cir";
> > reg = <0 0x10013000 0 0x1000>;
> > @@ -359,6 +383,18 @@
> > #clock-cells = <1>;
> > };
> >
> > + hdmi_phy: phy@10209100 {
> > + compatible = "mediatek,mt7623-hdmi-phy",
> > + "mediatek,mt2701-hdmi-phy";
> > + reg = <0 0x10209100 0 0x24>;
> > + clocks = <&apmixedsys CLK_APMIXED_HDMI_REF>;
> > + clock-names = "pll_ref";
> > + clock-output-names = "hdmitx_dig_cts";
> > + #clock-cells = <0>;
> > + #phy-cells = <0>;
> > + status = "disabled";
> > + };
> > +
> > rng: rng@1020f000 {
> > compatible = "mediatek,mt7623-rng";
> > reg = <0 0x1020f000 0 0x1000>;
> > @@ -558,6 +594,16 @@
> > status = "disabled";
> > };
> >
> > + hdmiddc0: i2c@11013000 {
> > + compatible = "mediatek,mt7623-hdmi-ddc",
> > + "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";
> > @@ -732,6 +778,84 @@
> > #clock-cells = <1>;
> > };
> >
> > + display_components: dispsys@14000000 {
> > + compatible = "mediatek,mt7623-mmsys",
>
> Checkpatch warning:
>
> WARNING: DT compatible string "mediatek,mt7623-mmsys" appears
> un-documented -- check ./Documentation/devicetree/bindings/
> #101: FILE: arch/arm/boot/dts/mt7623.dtsi:782:
> + compatible = "mediatek,mt7623-mmsys",
>
>
> > + "mediatek,mt2701-mmsys";
> > + reg = <0 0x14000000 0 0x1000>;
> > + power-domains = <&scpsys MT2701_POWER_DOMAIN_DISP>;
> > + };
> > +
> > + ovl@14007000 {
> > + compatible = "mediatek,mt7623-disp-ovl",
>
> I think this is also un-documented, but I don't know why checkpatch does
> not show any warning.
>
> Regards,
> CK
> > + "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>;
> > + };
> > +

I fallback to use the MT2701's compatible string here and there, but I
could add a new one for MT7623.

BTW, I've had this question for a long time - should I add a new
compatible for the very same IPs, or could we just use the old one in
DTS?

Ryder