2021-10-05 15:25:35

by Tim Harvey

Subject: [PATCH] arm64: dts: imx8mm-venice-gw7901.dts: disable pgc_gpumix

Since commit d39d4bb15310 ("arm64: dts: imx8mm: add GPC node") the
GW7901 will hang during kernel init because it does not power the unused GPU
voltage rails on the IMX8MM. Disable pgc_gpumix to work around this.

We also disable the GPU devices that depend on the gpumix power domain
to avoid them staying in a probe deferred state forever.

Cc: Lucas Stach <[email protected]>
Signed-off-by: Tim Harvey <[email protected]>
---
.../boot/dts/freescale/imx8mm-venice-gw7901.dts | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts
index bafd5c8ea4e2..e0153ce35722 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts
@@ -282,6 +282,14 @@
};
};

+&gpu_2d {
+ status = "disabled";
+};
+
+&gpu_3d {
+ status = "disabled";
+};
+
&i2c1 {
clock-frequency = <100000>;
pinctrl-names = "default";
@@ -632,6 +640,10 @@
status = "okay";
};

+&pgc_gpumix {
+ status = "disabled";
+};
+
&uart1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart1>, <&pinctrl_uart1_gpio>;
--
2.17.1

2021-10-06 07:25:00

by Lucas Stach

Subject: Re: [PATCH] arm64: dts: imx8mm-venice-gw7901.dts: disable pgc_gpumix

Am Dienstag, dem 05.10.2021 um 08:23 -0700 schrieb Tim Harvey:
> Since commit d39d4bb15310 ("arm64: dts: imx8mm: add GPC node") the
> GW7901 will hang during kernel init because it does not power the unused GPU
> voltage rails on the IMX8MM. Disable pgc_gpumix to work around this.
>
> We also disable the GPU devices that depend on the gpumix power domain
> to avoid them staying in a probe deferred state forever.
>
> Cc: Lucas Stach <[email protected]>
> Signed-off-by: Tim Harvey <[email protected]>
> ---
> .../boot/dts/freescale/imx8mm-venice-gw7901.dts | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts
> index bafd5c8ea4e2..e0153ce35722 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mm-venice-gw7901.dts
> @@ -282,6 +282,14 @@
> };
> };
>
> +&gpu_2d {
> + status = "disabled";
> +};
> +
> +&gpu_3d {
> + status = "disabled";
> +};
> +
> &i2c1 {
> clock-frequency = <100000>;
> pinctrl-names = "default";
> @@ -632,6 +640,10 @@
> status = "okay";
> };
>
> +&pgc_gpumix {
> + status = "disabled";
> +};

I suggest to also disable the pgc_gpu, as that one is in the same
situation as the GPU devices and will stay in probe deferred state
forever, as the gpumix domain is not available.

Regards,
Lucas

> +
> &uart1 {
> pinctrl-names = "default";
> pinctrl-0 = <&pinctrl_uart1>, <&pinctrl_uart1_gpio>;