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From: Alyssa Rosenzweig To: j@jannau.net Cc: Sven Peter , Neal Gompa , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Nick Chan , Sasha Finkelstein , asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] arm64: dts: apple: touchbar: Mark ps_dispdfr_be as always-on Message-ID: References: <20250416-arm64_dts_apple_touchbar-v1-1-e1c0b53b9125@jannau.net> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20250416-arm64_dts_apple_touchbar-v1-1-e1c0b53b9125@jannau.net> X-Migadu-Flow: FLOW_OUT Reviewed-by: Alyssa Rosenzweig Thanks for debugging this Le Wed , Apr 16, 2025 at 08:06:18PM +0200, Janne Grunau via B4 Relay a écrit : > From: Janne Grunau > > The driver depends on boot loader initialized state which resets when the > ps_dispdfr_be power-domain is powered off. This happens on suspend or > when the driver is missing during boot. > Mark the domain as always on until the driver can handle this. > > Fixes: 7275e795e520 ("arm64: dts: apple: Add touchbar screen nodes") > Signed-off-by: Janne Grunau > --- > arch/arm64/boot/dts/apple/t8103-j293.dts | 10 ++++++++++ > arch/arm64/boot/dts/apple/t8112-j493.dts | 10 ++++++++++ > 2 files changed, 20 insertions(+) > > diff --git a/arch/arm64/boot/dts/apple/t8103-j293.dts b/arch/arm64/boot/dts/apple/t8103-j293.dts > index 2dfe7b895b2bc0a913e73141e558fa5124a13b2e..e2d9439397f71a93c28b75a7eea589f4bcb3e374 100644 > --- a/arch/arm64/boot/dts/apple/t8103-j293.dts > +++ b/arch/arm64/boot/dts/apple/t8103-j293.dts > @@ -77,6 +77,16 @@ touchbar0: touchbar@0 { > }; > }; > > +/* > + * The driver depends on boot loader initialized state which resets when this > + * power-domain is powered off. This happens on suspend or when the driver is > + * missing during boot. Mark the domain as always on until the driver can > + * handle this. > + */ > +&ps_dispdfr_be { > + apple,always-on; > +}; > + > &display_dfr { > status = "okay"; > }; > diff --git a/arch/arm64/boot/dts/apple/t8112-j493.dts b/arch/arm64/boot/dts/apple/t8112-j493.dts > index 3d73f9ee2f46a35a3b23da5b233ef316c7372ef7..be86d34c6696cb47d31696541266e504cee8ce10 100644 > --- a/arch/arm64/boot/dts/apple/t8112-j493.dts > +++ b/arch/arm64/boot/dts/apple/t8112-j493.dts > @@ -40,6 +40,16 @@ led-0 { > }; > }; > > +/* > + * The driver depends on boot loader initialized state which resets when this > + * power-domain is powered off. This happens on suspend or when the driver is > + * missing during boot. Mark the domain as always on until the driver can > + * handle this. > + */ > +&ps_dispdfr_be { > + apple,always-on; > +}; > + > &display_dfr { > status = "okay"; > }; > > --- > base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8 > change-id: 20250416-arm64_dts_apple_touchbar-658cd974de97 > > Best regards, > -- > Janne Grunau > >