PCIe problem on RK3568 EVB

[Doug Brewer]

On Tue, Apr 18, 2023 at 5:22 PM Michael Riesch
<michael.riesch at wolfvision.net> wrote:
>
> Hi Doug,

Hi Michael,

> On 4/18/23 04:19, Doug Brewer wrote:
> > Hello,
> >
> > I added the following lines in rk3568-evb1-v10.dts:
> >
> > pcie30_avdd0v9: pcie30-avdd0v9 {
> >        compatible = "regulator-fixed";
> >        regulator-name = "pcie30_avdd0v9";
> >        regulator-always-on;
> >        regulator-boot-on;
> >        regulator-min-microvolt = <900000>;
> >        regulator-max-microvolt = <900000>;
> >        vin-supply = <&vcc3v3_sys>;
> > };
> >
> > pcie30_avdd1v8: pcie30-avdd1v8 {
> >        compatible = "regulator-fixed";
> >        regulator-name = "pcie30_avdd1v8";
> >        regulator-always-on;
> >        regulator-boot-on;
> >        regulator-min-microvolt = <1800000>;
> >        regulator-max-microvolt = <1800000>;
> >        vin-supply = <&vcc3v3_sys>;
> > };
> >
> > vcc3v3_pcie: gpio-regulator {
> >        compatible = "regulator-fixed";
> >        regulator-name = "vcc3v3_pcie";
> >        regulator-min-microvolt = <3300000>;
> >        regulator-max-microvolt = <3300000>;
> >        enable-active-high;
> >        gpio = <&gpio0 RK_PD4 GPIO_ACTIVE_HIGH>;
> >        startup-delay-us = <5000>;
> >        vin-supply = <&dc_12v>;
> > };
> >
> > &pcie30phy {
> >        status = "okay";
> > };
> >
> > &pcie3x2 {
> >        reset-gpios = <&gpio2 RK_PD6 GPIO_ACTIVE_HIGH>;
>
> Shouldn't there be a pinctrl? It seems the pcie3x2 has to possible pinouts?!
>
> >        vpcie3v3-supply = <&vcc3v3_pcie>;
> >        status = "okay";
> > };
> >
> Maybe you can take the Radxa ROCK3 Model A as mainline reference solution.

I added the following lines:

&pcie3x2 {
       pinctrl-names = "default";
       pinctrl-0 = <&pcie30x2m1_pins>;
       reset-gpios = <&gpio2 RK_PD6 GPIO_ACTIVE_HIGH>;
       vpcie3v3-supply = <&vcc3v3_pcie>;
       status = "okay";
};

Same result, lspci shows nothing.

> > lspci produces no output (literally nothing), even with -vvvv.
> > Any idea how to debug this?  Thanks.
>
> Again, please show us the full dmesg log and your current .config.

Here's my kernel config file: http://sprunge.us/LtErQm

> Additionally, the output of
>
>   cat /sys/kernel/debug/devices_deferred
>
> may be helpful to find any devices that could not be probed due to
> missing dependencies.

# cat /sys/kernel/debug/devices_deferred
#

Seems there's no missing dependencies.

> Best regards,
> Michael

Regards,
Doug