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Thu, 8 Jan 2026 16:04:42 -0500 (EST) From: Janne Grunau Date: Thu, 08 Jan 2026 22:04:03 +0100 Subject: [PATCH 3/3] arm64: dts: apple: t8103: Add ps_pmp dependency to ps_gfx Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260108-apple-dt-pmgr-fixes-v1-3-cfdce629c0a8@jannau.net> References: <20260108-apple-dt-pmgr-fixes-v1-0-cfdce629c0a8@jannau.net> In-Reply-To: <20260108-apple-dt-pmgr-fixes-v1-0-cfdce629c0a8@jannau.net> To: Sven Peter , Neal Gompa , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Janne Grunau X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1072; i=j@jannau.net; s=yk2025; h=from:subject:message-id; bh=11AMcjryIBqasark3A35Cj68+orOKw83gXx0NA7gkZM=; b=owGbwMvMwCW2UNrmdq9+ahrjabUkhswE6bu9W92P8dVtvz678tchX1OGOBHHS/2+GnNCHmxrC P1xq+5IRykLgxgXg6yYIkuS9ssOhtU1ijG1D8Jg5rAygQxh4OIUgIkUbmP4H5Re5nT1+bdELTNv VnWVBweesb8PvjZxQ6uE18+Ty9t/JTEyzJQXfuVZa8B+xLY2IEczf2fiutrzZ/jqz7HUfJ7tecS NEwA= X-Developer-Key: i=j@jannau.net; a=openpgp; fpr=8B336A6BE4E5695E89B8532B81E806F586338419 AGX appears to have a hidden communication channel to pmp, a power management related co-processor already brought up by Apple's bootloader. As there is not driver for this co-processor its power-domain gets shut down after the initial boot. This crashes the firmware running on AGX immediately. Until there is a pmp driver and the dependency between AGX and pmp is understood keep "ps_pmp" as dependency of "ps_gfx". Signed-off-by: Janne Grunau --- arch/arm64/boot/dts/apple/t8103-pmgr.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/boot/dts/apple/t8103-pmgr.dtsi b/arch/arm64/boot/dt= s/apple/t8103-pmgr.dtsi index 4bfe0d2de30ad6f975b31d443b62ef0e74b14324..fef8a4058f14159d953fdc1d47e= d83950e30a37e 100644 --- a/arch/arm64/boot/dts/apple/t8103-pmgr.dtsi +++ b/arch/arm64/boot/dts/apple/t8103-pmgr.dtsi @@ -733,6 +733,7 @@ ps_gfx: power-controller@3f8 { #power-domain-cells =3D <0>; #reset-cells =3D <0>; label =3D "gfx"; + power-domains =3D <&ps_pmp>; }; =20 ps_dcs4: power-controller@320 { --=20 2.52.0