Message ID | 20231003-mediatek-fixes-v6-7-v1-5-dad7cd62a8ff@collabora.com |
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State | New |
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h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=LGlEBYbuY63Hchodh7bTyq5hzODdZChQ/OdstXwzcxqLmt0ucGXdNpEzV6TIUZf9u ki6CZXIR1uAvPAV50mM5Ooqd6A5rjlLWqUpkF99k10n7UFrbrbfftrVibulI8qzVh3 sEaz3sAGneEL9Ck3aSHOvAtnyxtfxc1WNPFwYR+EwrFrw6XJO4DHjxsWyyPfVPICQq DNuG1kZd1iMzb/FfdOQ/Oq7jHxVhT5bBLtlg7S1inH814KXZpfSFbHIuNMSAb9ZPGj bagR0BpDdi3FErFpd8gsvAflzNo8bOATDPl1xL5Sa+zFIxawFJjwDlVA1FE9Olm1Ea j8HZFvL/FDw9g== From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Date: Tue, 03 Oct 2023 13:13:47 +0200 Subject: [PATCH 5/5] arm64: dts: mediatek: mt8195: Set DSU PMU status to fail MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Message-Id: <20231003-mediatek-fixes-v6-7-v1-5-dad7cd62a8ff@collabora.com> References: <20231003-mediatek-fixes-v6-7-v1-0-dad7cd62a8ff@collabora.com> In-Reply-To: <20231003-mediatek-fixes-v6-7-v1-0-dad7cd62a8ff@collabora.com> To: Matthias Brugger <matthias.bgg@gmail.com>, AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>, Rob Herring <robh+dt@kernel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, Conor Dooley <conor+dt@kernel.org>, Fabien Parent <fparent@baylibre.com>, Miles Chen <miles.chen@mediatek.com>, Macpaul Lin <macpaul.lin@mediatek.com>, Chunfeng Yun <chunfeng.yun@mediatek.com>, Sam Shih <sam.shih@mediatek.com>, Frank Wunderlich <frank-w@public-files.de>, Jieyy Yang <jieyy.yang@mediatek.com>, Tinghan Shen <tinghan.shen@mediatek.com>, Seiya Wang <seiya.wang@mediatek.com>, soc@kernel.org Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, devicetree@vger.kernel.org, =?utf-8?b?TsOtY29sYXMgRi4gUi4gQS4gUHJhZG8=?= <nfraprado@collabora.com> X-Mailer: b4 0.12.1 X-Developer-Signature: v=1; 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Series |
MediaTek: Update MAINTAINERS and dts fixes for v6.7
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Commit Message
AngeloGioacchino Del Regno
Oct. 3, 2023, 11:13 a.m. UTC
From: "NĂcolas F. R. A. Prado" <nfraprado@collabora.com> The DSU PMU allows monitoring performance events in the DSU cluster, which is done by configuring and reading back values from the DSU PMU system registers. However, for write-access to be allowed by ELs lower than EL3, the EL3 firmware needs to update the setting on the ACTLR3_EL3 register, as it is disallowed by default. That configuration is not done on the firmware used by the MT8195 SoC, as a consequence, booting a MT8195-based machine like mt8195-cherry-tomato-r2 with CONFIG_ARM_DSU_PMU enabled hangs the kernel just as it writes to the CLUSTERPMOVSCLR_EL1 register, since the instruction faults to EL3, and BL31 apparently just re-runs the instruction over and over. Mark the DSU PMU node in the Devicetree with status "fail", as the machine doesn't have a suitable firmware to make use of it from the kernel, and allowing its driver to probe would hang the kernel. Fixes: 37f2582883be ("arm64: dts: Add mediatek SoC mt8195 and evaluation board") Signed-off-by: NĂcolas F. R. A. Prado <nfraprado@collabora.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Link: https://lore.kernel.org/r/20230720200753.322133-1-nfraprado@collabora.com --- arch/arm64/boot/dts/mediatek/mt8195.dtsi | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/arm64/boot/dts/mediatek/mt8195.dtsi b/arch/arm64/boot/dts/mediatek/mt8195.dtsi index 4dbbf8fdab75..43011bc41da7 100644 --- a/arch/arm64/boot/dts/mediatek/mt8195.dtsi +++ b/arch/arm64/boot/dts/mediatek/mt8195.dtsi @@ -313,6 +313,7 @@ dsu-pmu { interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH 0>; cpus = <&cpu0>, <&cpu1>, <&cpu2>, <&cpu3>, <&cpu4>, <&cpu5>, <&cpu6>, <&cpu7>; + status = "fail"; }; dmic_codec: dmic-codec {