linux-kernel - Re: [PATCH RESEND] ARM: dts: imx6sx: Add DISPLAY power domain support

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Date:   Mon, 07 Jan 2019 16:17:55 +0100
From:   Lucas Stach <l.stach@...gutronix.de>
To:     Leonard Crestez <leonard.crestez@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Cc:     Fabio Estevam <fabio.estevam@....com>,
        Aisheng Dong <aisheng.dong@....com>,
        Richard Zhu <hongxing.zhu@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        dl-linux-imx <linux-imx@....com>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>
Subject: Re: [PATCH RESEND] ARM: dts: imx6sx: Add DISPLAY power domain
 support

Am Montag, den 07.01.2019, 13:28 +0000 schrieb Leonard Crestez:
> This was implemented in the driver but not actually defined and
> referenced in dts. This makes it always on.
> 
> From reference manual in section "10.4.1.4.1 Power Distribution":
> 
> "Display domain - The DISPLAY domain contains GIS, CSI, PXP, LCDIF,
> PCIe, DCIC, and LDB. It is supplied by internal regulator."
> 
> The current pd_pcie is actually only for PCIE_PHY, the PCIE ip block is
> actually inside the DISPLAY domain. Handle this by adding the pcie node
> in both power domains.
> 
> Signed-off-by: Leonard Crestez <leonard.crestez@....com>

Acked-by: Lucas Stach <l.stach@...gutronix.de>

> ---
>  arch/arm/boot/dts/imx6sx.dtsi | 19 ++++++++++++++++++-
>  1 file changed, 18 insertions(+), 1 deletion(-)
> 
> This is the last part of a series which was previously accepted, it was
> delayed because it depends on PCI multi-pd support. All driver
> dependencies have landed in 5.0-rc1, resending for 5.1 as discussed:
> 
> 	https://lore.kernel.org/patchwork/patch/996812/#1190746
> 
> Only change is a minor conflict with removing a pxp clk.
> 
> diff --git a/arch/arm/boot/dts/imx6sx.dtsi b/arch/arm/boot/dts/imx6sx.dtsi
> index 272ff6133ec1..ecf3f3e5c0a0 100644
> --- a/arch/arm/boot/dts/imx6sx.dtsi
> +++ b/arch/arm/boot/dts/imx6sx.dtsi
> @@ -783,10 +783,22 @@
> >  						#power-domain-cells = <0>;
> >  						power-supply = <&reg_soc>;
> >  						clocks = <&clks IMX6SX_CLK_GPU>;
> >  					};
>  
> > > +					pd_disp: power-domain@2 {
> > +						reg = <2>;
> > +						#power-domain-cells = <0>;
> > +						clocks = <&clks IMX6SX_CLK_PXP_AXI>,
> > +							 <&clks IMX6SX_CLK_DISPLAY_AXI>,
> > +							 <&clks IMX6SX_CLK_LCDIF1_PIX>,
> > +							 <&clks IMX6SX_CLK_LCDIF_APB>,
> > +							 <&clks IMX6SX_CLK_LCDIF2_PIX>,
> > +							 <&clks IMX6SX_CLK_CSI>,
> > +							 <&clks IMX6SX_CLK_VADC>;
> > +					};
> +
> > >  					pd_pci: power-domain@3 {
> >  						reg = <3>;
> >  						#power-domain-cells = <0>;
> >  						power-supply = <&reg_pcie>;
> >  					};
> @@ -1203,10 +1215,11 @@
> >  					compatible = "fsl,imx6sx-pxp", "fsl,imx6ull-pxp";
> >  					reg = <0x02218000 0x4000>;
> >  					interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
> >  					clocks = <&clks IMX6SX_CLK_PXP_AXI>;
> >  					clock-names = "axi";
> > +					power-domains = <&pd_disp>;
> >  					status = "disabled";
> >  				};
>  
> > >  				csi2: csi@...c000 {
> >  					reg = <0x0221c000 0x4000>;
> @@ -1224,10 +1237,11 @@
> >  					interrupts = <GIC_SPI 5 IRQ_TYPE_EDGE_RISING>;
> >  					clocks = <&clks IMX6SX_CLK_LCDIF1_PIX>,
> >  						 <&clks IMX6SX_CLK_LCDIF_APB>,
> >  						 <&clks IMX6SX_CLK_DISPLAY_AXI>;
> >  					clock-names = "pix", "axi", "disp_axi";
> > +					power-domains = <&pd_disp>;
> >  					status = "disabled";
> >  				};
>  
> > >  				lcdif2: lcdif@...4000 {
> >  					compatible = "fsl,imx6sx-lcdif", "fsl,imx28-lcdif";
> @@ -1235,19 +1249,21 @@
> >  					interrupts = <GIC_SPI 6 IRQ_TYPE_EDGE_RISING>;
> >  					clocks = <&clks IMX6SX_CLK_LCDIF2_PIX>,
> >  						 <&clks IMX6SX_CLK_LCDIF_APB>,
> >  						 <&clks IMX6SX_CLK_DISPLAY_AXI>;
> >  					clock-names = "pix", "axi", "disp_axi";
> > +					power-domains = <&pd_disp>;
> >  					status = "disabled";
> >  				};
>  
> > >  				vadc: vadc@...8000 {
> >  					reg = <0x02228000 0x4000>, <0x0222c000 0x4000>;
> >  					reg-names = "vadc-vafe", "vadc-vdec";
> >  					clocks = <&clks IMX6SX_CLK_VADC>,
> >  						 <&clks IMX6SX_CLK_CSI>;
> >  					clock-names = "vadc", "csi";
> > +					power-domains = <&pd_disp>;
> >  					status = "disabled";
> >  				};
> >  			};
>  
> > >  			adc1: adc@...0000 {
> @@ -1368,10 +1384,11 @@
> >  			clocks = <&clks IMX6SX_CLK_PCIE_AXI>,
> >  				 <&clks IMX6SX_CLK_LVDS1_OUT>,
> >  				 <&clks IMX6SX_CLK_PCIE_REF_125M>,
> >  				 <&clks IMX6SX_CLK_DISPLAY_AXI>;
> >  			clock-names = "pcie", "pcie_bus", "pcie_phy", "pcie_inbound_axi";
> > -			power-domains = <&pd_pci>;
> > +			power-domains = <&pd_disp>, <&pd_pci>;
> > +			power-domain-names = "pcie", "pcie_phy";
> >  			status = "disabled";
> >  		};
> >  	};
>  };