linux-kernel - Re: [PATCH 1/3] arm64: dts: rockchip: set display regulators to always-on on BPI-R2-Pro

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Date:   Tue, 17 May 2022 20:47:49 +0200
From:   Heiko Stuebner <heiko@...ech.de>
To:     Frank Wunderlich <linux@...web.de>
Cc:     Frank Wunderlich <frank-w@...lic-files.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Peter Geis <pgwipeout@...il.com>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] arm64: dts: rockchip: set display regulators to always-on on BPI-R2-Pro

Am Freitag, 15. April 2022, 12:49:49 CEST schrieb Frank Wunderlich:
> From: Frank Wunderlich <frank-w@...lic-files.de>
> 
> Set display related regulators to always-on on Banana PI R2 Pro
> board.

Hmm, I'd expect some sort of explanation for the "why" here.
It looks like both the gpu patch as well as the vop patch do
reference the relevant regulators for the gpu+hdmi nodes,
so in theory this shouldn't be necessary anymore?

> 
> Signed-off-by: Frank Wunderlich <frank-w@...lic-files.de>
> ---
>  arch/arm64/boot/dts/rockchip/rk3568-bpi-r2-pro.dts | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3568-bpi-r2-pro.dts b/arch/arm64/boot/dts/rockchip/rk3568-bpi-r2-pro.dts
> index 2700fb18a3bc..0950f9659bb4 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3568-bpi-r2-pro.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3568-bpi-r2-pro.dts
> @@ -225,6 +225,7 @@ regulator-state-mem {
>  
>  			vdd_gpu: DCDC_REG2 {
>  				regulator-name = "vdd_gpu";
> +				regulator-always-on;
>  				regulator-init-microvolt = <900000>;
>  				regulator-initial-mode = <0x2>;
>  				regulator-min-microvolt = <500000>;
> @@ -274,6 +275,7 @@ regulator-state-mem {
>  
>  			vdda0v9_image: LDO_REG1 {
>  				regulator-name = "vdda0v9_image";
> +				regulator-always-on;
>  				regulator-min-microvolt = <900000>;
>  				regulator-max-microvolt = <900000>;
>  
> @@ -369,6 +371,7 @@ regulator-state-mem {
>  
>  			vcca1v8_image: LDO_REG9 {
>  				regulator-name = "vcca1v8_image";
> +				regulator-always-on;
>  				regulator-min-microvolt = <1800000>;
>  				regulator-max-microvolt = <1800000>;
>  
>