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Date:   Sun, 24 Oct 2021 17:18:41 -0400
From:   Siva Mahadevan <me@...hdvn.name>
To:     Jian-Hong Pan <jhp@...lessos.org>,
        Rob Herring <robh+dt@...nel.org>,
        Heiko Stuebner <heiko@...ech.de>, Soeren Moch <smoch@....de>,
        Tobias Schramm <t.schramm@...jaro.org>,
        Johan Jonker <jbx6244@...il.com>,
        Katsuhiro Suzuki <katsuhiro@...suster.net>,
        Hugh Cole-Baker <sigmaris@...il.com>,
        Robin Murphy <robin.murphy@....com>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux@...lessm.com
Subject: Re: [PATCH] arm64: dts: rockchip: disable USB type-c DisplayPort

Jian-Hong Pan wrote:
> The cdn-dp sub driver probes the device failed on PINEBOOK Pro.
> 
> kernel: cdn-dp fec00000.dp: [drm:cdn_dp_probe [rockchipdrm]] *ERROR* missing extcon or phy
> kernel: cdn-dp: probe of fec00000.dp failed with error -22
> 
> Then, the device halts all of the DRM related device jobs. For example,
> the operations: vop_component_ops, vop_component_ops and
> rockchip_dp_component_ops cannot be bound to corresponding devices. So,
> Xorg cannot find the correct DRM device.
> 
> The USB type-C DisplayPort does not work for now. So, disable the
> DisplayPort node until the type-C phy work has been done.
> 
> Link: https://patchwork.kernel.org/patch/11794141/#23639877
> Signed-off-by: Jian-Hong Pan <jhp@...lessos.org>
> ---
>  arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts b/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts
> index 06d48338c836..d624c595c533 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3399-pinebook-pro.dts
> @@ -380,7 +380,7 @@ mains_charger: dc-charger {
>  };
>  
>  &cdn_dp {
> -	status = "okay";
> +	status = "disabled";
>  };
>  
>  &cpu_b0 {
> -- 
> 2.28.0

I saw a similar patch posted at https://lkml.org/lkml/2021/7/15/752. I
was wondering if one of these patches will be submitted to mainline, or
what the status on this patch is. I can confirm that this does solve
the issue on my Pinebook Pro. Will this go forward?

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