From: Heiko Stuebner <heiko@sntech.de> To: Matthias Kaehlcke <mka@chromium.org> Cc: Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Douglas Anderson <dianders@chromium.org> Subject: Re: [PATCH v2 1/3] ARM: dts: rockchip: disable GPU 500 MHz OPP for veyron Date: Wed, 22 May 2019 11:14:29 +0200 [thread overview] Message-ID: <3108277.JP5bvJISVS@phil> (raw) In-Reply-To: <20190520220051.54847-1-mka@chromium.org> Am Dienstag, 21. Mai 2019, 00:00:49 CEST schrieb Matthias Kaehlcke: > The NPLL is the only safe way to generate 500 MHz for the GPU. The > downstream Chrome OS 3.14 kernel ('official' kernel for veyron > devices) re-purposes NPLL to HDMI and hence disables the OPP for > the GPU (see https://crrev.com/c/1574579). Disable it here as well > to keep in sync and avoid problems in case someone decides to > re-purpose NPLL. > > Signed-off-by: Matthias Kaehlcke <mka@chromium.org> I was actually expecting to just drop the 500MHz opp from all of rk3288 ;-) . To not have to respin, I just modified your patch accordingly, see [0] and please holler if you disagree :-D . Heiko [0] https://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip.git/commit/?id=75481833c6dbab4c29d15452f6b4337c16f5407b > --- > Changes in v2: > - patch added to the series > --- > arch/arm/boot/dts/rk3288-veyron.dtsi | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/arch/arm/boot/dts/rk3288-veyron.dtsi b/arch/arm/boot/dts/rk3288-veyron.dtsi > index 90c8312d01ff..ec10ce4fcf04 100644 > --- a/arch/arm/boot/dts/rk3288-veyron.dtsi > +++ b/arch/arm/boot/dts/rk3288-veyron.dtsi > @@ -174,6 +174,14 @@ > temperature = <100000>; > }; > > +/* > + * Remove 500 MHz since the only way to make 500 MHz is via the NPLL > + * which might be used for HDMI. > + */ > +&gpu_opp_table { > + /delete-node/ opp-500000000; > +}; > + > &hdmi { > ddc-i2c-bus = <&i2c5>; > status = "okay"; >
WARNING: multiple messages have this Message-ID (diff)
From: Heiko Stuebner <heiko@sntech.de> To: Matthias Kaehlcke <mka@chromium.org> Cc: Mark Rutland <mark.rutland@arm.com>, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Douglas Anderson <dianders@chromium.org>, linux-rockchip@lists.infradead.org, Rob Herring <robh+dt@kernel.org>, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v2 1/3] ARM: dts: rockchip: disable GPU 500 MHz OPP for veyron Date: Wed, 22 May 2019 11:14:29 +0200 [thread overview] Message-ID: <3108277.JP5bvJISVS@phil> (raw) In-Reply-To: <20190520220051.54847-1-mka@chromium.org> Am Dienstag, 21. Mai 2019, 00:00:49 CEST schrieb Matthias Kaehlcke: > The NPLL is the only safe way to generate 500 MHz for the GPU. The > downstream Chrome OS 3.14 kernel ('official' kernel for veyron > devices) re-purposes NPLL to HDMI and hence disables the OPP for > the GPU (see https://crrev.com/c/1574579). Disable it here as well > to keep in sync and avoid problems in case someone decides to > re-purpose NPLL. > > Signed-off-by: Matthias Kaehlcke <mka@chromium.org> I was actually expecting to just drop the 500MHz opp from all of rk3288 ;-) . To not have to respin, I just modified your patch accordingly, see [0] and please holler if you disagree :-D . Heiko [0] https://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip.git/commit/?id=75481833c6dbab4c29d15452f6b4337c16f5407b > --- > Changes in v2: > - patch added to the series > --- > arch/arm/boot/dts/rk3288-veyron.dtsi | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/arch/arm/boot/dts/rk3288-veyron.dtsi b/arch/arm/boot/dts/rk3288-veyron.dtsi > index 90c8312d01ff..ec10ce4fcf04 100644 > --- a/arch/arm/boot/dts/rk3288-veyron.dtsi > +++ b/arch/arm/boot/dts/rk3288-veyron.dtsi > @@ -174,6 +174,14 @@ > temperature = <100000>; > }; > > +/* > + * Remove 500 MHz since the only way to make 500 MHz is via the NPLL > + * which might be used for HDMI. > + */ > +&gpu_opp_table { > + /delete-node/ opp-500000000; > +}; > + > &hdmi { > ddc-i2c-bus = <&i2c5>; > status = "okay"; > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-05-22 9:14 UTC|newest] Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-05-20 22:00 [PATCH v2 1/3] ARM: dts: rockchip: disable GPU 500 MHz OPP for veyron Matthias Kaehlcke 2019-05-20 22:00 ` Matthias Kaehlcke 2019-05-20 22:00 ` [PATCH v2 2/3] ARM: dts: rockchip: Use the GPU to cool CPU thermal zone of veyron mickey Matthias Kaehlcke 2019-05-20 22:00 ` Matthias Kaehlcke 2019-05-20 23:26 ` Doug Anderson 2019-05-20 23:26 ` Doug Anderson 2019-05-22 9:14 ` Heiko Stuebner 2019-05-22 9:14 ` Heiko Stuebner 2019-05-20 22:00 ` [PATCH v2 3/3] ARM: dts: rockchip: Configure the GPU thermal zone for mickey Matthias Kaehlcke 2019-05-20 22:00 ` Matthias Kaehlcke 2019-05-20 23:29 ` Doug Anderson 2019-05-20 23:29 ` Doug Anderson 2019-05-20 23:24 ` [PATCH v2 1/3] ARM: dts: rockchip: disable GPU 500 MHz OPP for veyron Doug Anderson 2019-05-20 23:24 ` Doug Anderson 2019-05-22 9:14 ` Heiko Stuebner [this message] 2019-05-22 9:14 ` Heiko Stuebner 2019-05-22 18:13 ` Doug Anderson 2019-05-22 18:13 ` Doug Anderson
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