Re: [PATCH] arm64: dts: rockchip: include uhs support for rockpro64

From: "Christian Löhle" <CLoehle@hyperstone.com>
To: Soeren Moch <smoch@web.de>,
	"robh+dt@kernel.org" <robh+dt@kernel.org>,
	"heiko@sntech.de" <heiko@sntech.de>,
	"jbx6244@gmail.com" <jbx6244@gmail.com>,
	"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"linux-rockchip@lists.infradead.org" 
	<linux-rockchip@lists.infradead.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] arm64: dts: rockchip: include uhs support for rockpro64
Date: Wed, 28 Apr 2021 06:28:06 +0000	[thread overview]
Message-ID: <CWXP265MB2680159B5F44B014FA544E89C4409@CWXP265MB2680.GBRP265.PROD.OUTLOOK.COM> (raw)
In-Reply-To: <97bcbcde-9ccf-f9cc-ef10-36cbd582825a@web.de>

Oh okay, I was not aware of this issue
and have not encountered it yet.
But wouldn't it be more appropriate
to get u-boot to power cycle the host controller at boot?

From: Soeren Moch <smoch@web.de>
Sent: Tuesday, April 27, 2021 5:07 PM
To: Christian Löhle <CLoehle@hyperstone.com>; robh+dt@kernel.org <robh+dt@kernel.org>; heiko@sntech.de <heiko@sntech.de>; jbx6244@gmail.com <jbx6244@gmail.com>; devicetree@vger.kernel.org <devicetree@vger.kernel.org>; linux-arm-kernel@lists.infradead.org <linux-arm-kernel@lists.infradead.org>; linux-rockchip@lists.infradead.org <linux-rockchip@lists.infradead.org>; linux-kernel@vger.kernel.org <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] arm64: dts: rockchip: include uhs support for rockpro64 

On 27.04.21 08:20, Christian L?hle wrote:
> The DesignWare Host Controller has full UHS-I support, so use it.
Enabling this UHS support makes 'reboot' hang when booting the RockPro64
from SD card. It would work when booting from eMMC, or with a modified
ATF which does a power cycle on reboot.

But for general use it is not save to enable UHS support, or did I miss
some recent changes?

Regards,
Soeren
>
> Signed-off-by: Christian Loehle <cloehle@hyperstone.com>
> ---
>  arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi
> index 6bff8db7d33e..d22a489ec214 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi
> +++ b/arch/arm64/boot/dts/rockchip/rk3399-rockpro64.dtsi
> @@ -722,6 +722,7 @@ &sdmmc {
>        max-frequency = <150000000>;
>        pinctrl-names = "default";
>        pinctrl-0 = <&sdmmc_clk &sdmmc_cmd &sdmmc_bus4>;
> +     sd-uhs-sdr104;
>        vmmc-supply = <&vcc3v0_sd>;
>        vqmmc-supply = <&vcc_sdio>;
>        status = "okay";

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