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Date: Tue, 24 May 2022 02:44:45 +0000
From: Hongxing Zhu <hongxing.zhu@....com>
To: "tharvey@...eworks.com" <tharvey@...eworks.com>
CC: Lucas Stach <l.stach@...gutronix.de>,
"p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
"bhelgaas@...gle.com" <bhelgaas@...gle.com>,
"lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
"robh@...nel.org" <robh@...nel.org>,
"shawnguo@...nel.org" <shawnguo@...nel.org>,
"vkoul@...nel.org" <vkoul@...nel.org>,
"alexander.stein@...tq-group.com" <alexander.stein@...tq-group.com>,
"linux-phy@...ts.infradead.org" <linux-phy@...ts.infradead.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"kernel@...gutronix.de" <kernel@...gutronix.de>,
dl-linux-imx <linux-imx@....com>
Subject: RE: [PATCH v2 5/7] arm64: dts: imx8mp: add the iMX8MP PCIe support
> -----Original Message-----
> From: Tim Harvey <tharvey@...eworks.com>
> Sent: 2022年5月24日 2:48
> To: Hongxing Zhu <hongxing.zhu@....com>
> Cc: Lucas Stach <l.stach@...gutronix.de>; p.zabel@...gutronix.de;
> bhelgaas@...gle.com; lorenzo.pieralisi@....com; robh@...nel.org;
> shawnguo@...nel.org; vkoul@...nel.org; alexander.stein@...tq-group.com;
> linux-phy@...ts.infradead.org; devicetree@...r.kernel.org;
> linux-pci@...r.kernel.org; linux-arm-kernel@...ts.infradead.org;
> linux-kernel@...r.kernel.org; kernel@...gutronix.de; dl-linux-imx
> <linux-imx@....com>
> Subject: Re: [PATCH v2 5/7] arm64: dts: imx8mp: add the iMX8MP PCIe
> support
>
> On Sun, Apr 17, 2022 at 10:00 PM Hongxing Zhu <hongxing.zhu@....com>
> wrote:
> >
> > > -----Original Message-----
> > > From: Lucas Stach <l.stach@...gutronix.de>
> > > Sent: 2022年4月15日 5:03
> > > To: Hongxing Zhu <hongxing.zhu@....com>; p.zabel@...gutronix.de;
> > > bhelgaas@...gle.com; lorenzo.pieralisi@....com; robh@...nel.org;
> > > shawnguo@...nel.org; vkoul@...nel.org;
> > > alexander.stein@...tq-group.com
> > > Cc: linux-phy@...ts.infradead.org; devicetree@...r.kernel.org;
> > > linux-pci@...r.kernel.org; linux-arm-kernel@...ts.infradead.org;
> > > linux-kernel@...r.kernel.org; kernel@...gutronix.de; dl-linux-imx
> > > <linux-imx@....com>
> > > Subject: Re: [PATCH v2 5/7] arm64: dts: imx8mp: add the iMX8MP PCIe
> > > support
> > >
> > > Am Montag, dem 07.03.2022 um 17:07 +0800 schrieb Richard Zhu:
> > > > Add the i.MX8MP PCIe support.
> > > >
> > > > Signed-off-by: Richard Zhu <hongxing.zhu@....com>
> > > > ---
> > > > arch/arm64/boot/dts/freescale/imx8mp.dtsi | 46
> > > > ++++++++++++++++++++++-
> > > > 1 file changed, 45 insertions(+), 1 deletion(-)
> > > >
> > > > diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > > > b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > > > index b40a5646f205..e7b3d8029e34 100644
> > > > --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > > > +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> > > > @@ -5,6 +5,7 @@
> > > >
> > > > #include <dt-bindings/clock/imx8mp-clock.h>
> > > > #include <dt-bindings/power/imx8mp-power.h>
> > > > +#include <dt-bindings/reset/imx8mp-reset.h>
> > > > #include <dt-bindings/gpio/gpio.h> #include
> > > > <dt-bindings/input/input.h> #include
> > > > <dt-bindings/interrupt-controller/arm-gic.h>
> > > > @@ -375,7 +376,8 @@ iomuxc: pinctrl@...30000 {
> > > > };
> > > >
> > > > gpr: iomuxc-gpr@...40000 {
> > > > - compatible = "fsl,imx8mp-iomuxc-gpr",
> "syscon";
> > > > + compatible = "fsl,imx8mp-iomuxc-gpr",
> > > > + "fsl,imx6q-iomuxc-gpr",
> > > > + "syscon";
> > > > reg = <0x30340000 0x10000>;
> > > > };
> > > >
> > > > @@ -965,6 +967,17 @@ aips4: bus@...00000 {
> > > > #size-cells = <1>;
> > > > ranges;
> > > >
> > > > + pcie_phy: pcie-phy@...00000 {
> > > > + compatible = "fsl,imx8mp-pcie-phy";
> > > > + reg = <0x32f00000 0x10000>;
> > > > + resets = <&src
> IMX8MP_RESET_PCIEPHY>,
> > > > + <&src
> IMX8MP_RESET_PCIEPHY_PERST>;
> > > > + reset-names = "pciephy", "perst";
> > > > + power-domains = <&hsio_blk_ctrl
> > > IMX8MP_HSIOBLK_PD_PCIE_PHY>;
> > > > + #phy-cells = <0>;
> > > > + status = "disabled";
> > > > + };
> > > > +
> > > > hsio_blk_ctrl: blk-ctrl@...10000 {
> > > > compatible = "fsl,imx8mp-hsio-blk-ctrl",
> "syscon";
> > > > reg = <0x32f10000 0x24>; @@ -980,6
> > > > +993,37 @@ hsio_blk_ctrl: blk-ctrl@...10000 {
> > > > };
> > > > };
> > > >
> > > > + pcie: pcie@...00000 {
> > > > + compatible = "fsl,imx8mp-pcie";
> > > > + reg = <0x33800000 0x400000>, <0x1ff00000
> 0x80000>;
> > > > + reg-names = "dbi", "config";
> > > > + #address-cells = <3>;
> > > > + #size-cells = <2>;
> > > > + device_type = "pci";
> > > > + bus-range = <0x00 0xff>;
> > > > + ranges = <0x81000000 0 0x00000000
> 0x1ff80000
> > > > + 0
> > > 0x00010000 /* downstream I/O 64KB */
> > > > + 0x82000000 0 0x18000000
> 0x18000000
> > > > + 0
> > > 0x07f00000>; /* non-prefetchable memory */
> > > > + num-lanes = <1>;
> > > > + num-viewport = <4>;
> > > > + interrupts = <GIC_SPI 140
> IRQ_TYPE_LEVEL_HIGH>;
> > > > + interrupt-names = "msi";
> > > > + #interrupt-cells = <1>;
> > > > + interrupt-map-mask = <0 0 0 0x7>;
> > > > + interrupt-map = <0 0 0 1 &gic GIC_SPI 126
> > > IRQ_TYPE_LEVEL_HIGH>,
> > > > + <0 0 0 2 &gic GIC_SPI 125
> IRQ_TYPE_LEVEL_HIGH>,
> > > > + <0 0 0 3 &gic GIC_SPI 124
> IRQ_TYPE_LEVEL_HIGH>,
> > > > + <0 0 0 4 &gic GIC_SPI 123
> IRQ_TYPE_LEVEL_HIGH>;
> > > > + fsl,max-link-speed = <3>;
> > >
> > > I believe that imx6_pcie_start_link does not properly handle Gen3 speeds.
> > Good caught.
> > The according link_gen condition should be changed in driver too.
> > Would be changed in next version.
> > Thanks.
> >
> > Best Regards
> > Richard Zhu
> > >
> > > Regards,
> > > Lucas
> > >
> > > > + linux,pci-domain = <0>;
> > > > + power-domains = <&hsio_blk_ctrl
> IMX8MP_HSIOBLK_PD_PCIE>;
> > > > + resets = <&src
> IMX8MP_RESET_PCIE_CTRL_APPS_EN>,
> > > > + <&src
> IMX8MP_RESET_PCIE_CTRL_APPS_TURNOFF>;
> > > > + reset-names = "apps", "turnoff";
> > > > + phys = <&pcie_phy>;
> > > > + phy-names = "pcie-phy";
> > > > + status = "disabled";
> > > > + };
> > > > +
> > > > gpu3d: gpu@...00000 {
> > > > compatible = "vivante,gc";
> > > > reg = <0x38000000 0x8000>;
> > >
> >
>
> Richard,
>
> Do you have an updated series for IMX8MP PCIe yet? I believe everything you
> were waiting on is now merged (blk-ctrl and power-domain).
Hi Tim:
Thanks for your kindly help.
Lucas has some suggestions and advices about the HSIOMIX bits manipulations
in the PHY driver of this series(#3 patch).
Would issue the next version, after co-operate with Lucas and settle-down
that part.
Best Regards
Richard Zhu
>
> Best Regards,
>
> Tim
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