linux-kernel - Re: [PATCH 5/5] ARM: dts: rockchip: vdd_gpu off in suspend for rk3288-veyron

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Date:   Fri, 12 Apr 2019 09:55:18 +0800
From:   "elaine.zhang" <zhangqing@...k-chips.com>
To:     Douglas Anderson <dianders@...omium.org>,
        Heiko Stuebner <heiko@...ech.de>
Cc:     dbasehore@...omium.org, amstan@...omium.org,
        linux-rockchip@...ts.infradead.org, briannorris@...omium.org,
        mka@...omium.org, ryandcase@...omium.org,
        Chris Zhong <zyw@...k-chips.com>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 5/5] ARM: dts: rockchip: vdd_gpu off in suspend for
 rk3288-veyron

hi,

在 2019/4/12 上午7:21, Douglas Anderson 写道:
> At some point long long ago the downstream GPU driver would crash if
> we turned the GPU off during suspend.  For some context you can see:
>
> https://chromium-review.googlesource.com/#/c/215780/5..6/arch/arm/boot/dts/rk3288-pinky-rev2.dts
>
> At some point in time not too long after that got fixed.
>
> It's unclear why the GPU is left enabled during suspend on the
> mainline kernel.  Everything seems fine if I turn this off, so let's
> do it.
>
> Signed-off-by: Douglas Anderson <dianders@...omium.org>
> ---
>
>   arch/arm/boot/dts/rk3288-veyron.dtsi | 3 +--
>   1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/arch/arm/boot/dts/rk3288-veyron.dtsi b/arch/arm/boot/dts/rk3288-veyron.dtsi
> index 279d7f4ecce0..1252522392c7 100644
> --- a/arch/arm/boot/dts/rk3288-veyron.dtsi
> +++ b/arch/arm/boot/dts/rk3288-veyron.dtsi
> @@ -217,8 +217,7 @@
>   				regulator-max-microvolt = <1250000>;
>   				regulator-ramp-delay = <6001>;
>   				regulator-state-mem {
> -					regulator-on-in-suspend;
> -					regulator-suspend-microvolt = <1000000>;
> +					regulator-off-in-suspend;
>   				};
>   			};
>   

Reviewed-by: Elaine Zhang<zhangqing@...k-chips.com>