From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f169.google.com (mail-pl1-f169.google.com [209.85.214.169]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A3C191DFD98 for ; Tue, 29 Oct 2024 10:02:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.169 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730196153; cv=none; b=i+NcSx4CTmke8f0OEX34JMzMDB3NgM9E3YrByaNHIiY3EwE9gF5WQzU4u565d+ZA/maIfX1H8p+HzQtKMmpb1HBjvBgT5kmJ2dlzXW6xnKmg050QtsOVQGD9nNBHtMEXQGP20fqtauVJ9NA/6hKgtCuVyo/1JL1QgXaWx2Ea5IM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730196153; c=relaxed/simple; bh=V9yrLlvpjMhAOtTUuzUbS/PuBDjwNV+agqaeXIEXbGs=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Ht18nceSuxFL1moyGqBCCiOhF6+15T8BC3vY5CqrCJAAzDqoWaOFFx2YPvoyUWH8oGYYPVqVdt8wZBXPRU+lRx4l6qi49XORSnMTEAj2ghsXjwBX3vUpmCsKmV09YVT/C9skL9WEFLAfl8ZNKQpVB3Hdoe/gtnxV/aMi67VBYyk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org; spf=pass smtp.mailfrom=chromium.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b=YILfGrWY; arc=none smtp.client-ip=209.85.214.169 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=chromium.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="YILfGrWY" Received: by mail-pl1-f169.google.com with SMTP id d9443c01a7336-20cdda5cfb6so49869775ad.3 for ; Tue, 29 Oct 2024 03:02:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1730196151; x=1730800951; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=dP0KAMyVWS6Yj9qu9bHMDh95jkCq6kFe5y2/InwDUyI=; b=YILfGrWY7CaTHRKCIRw5iDpaRqxT0fAn2HQ59GqNawfk/lOIz4lBD7RUcGIrGt6W4g bj/nEROdOS5UCy+rQFPY566tNNFFg6pvrUSlD9YxqklHX95BqgmxC97Ymm/F49wza42d 34TqaH1mXPKoIgrQOCnMXoE+7WwSuPOirLiQg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730196151; x=1730800951; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=dP0KAMyVWS6Yj9qu9bHMDh95jkCq6kFe5y2/InwDUyI=; b=b+y60/Xgxjoc8OwmrOS4DlNbstEKX7AGPKF9G0tc5Y2JNY25Ci4fsYUF1lnGH8YcA3 z/RGoffNBnQVvlPlX9n2Twc4fZbm1b3pDArKJ1mCEwl4gEOI3GlYQeqQLyhdnagF5/YD lMzDwgoRCHK1ueR84XHvDpnf/+qum5x5AiVOqUB9V44Tg56oCE+CS2PuBddXy4MyS6O1 eh76iSoii4G6A/8wNzFoCgKAuBvYo9yTxV4roDcXQBo4sIRIX2xZx9aAABEGefksLpxR vDj8HJKSe9hqK4njU14uJofnS1/bL3kPogczjTCygqfaOCd8TiRsUmuBTdRiP/lXTbY5 hmUQ== X-Forwarded-Encrypted: i=1; AJvYcCX2ngS590TxgSEnovzk7FbtPtDFTyZ1oe9gxkEF8SP2/hLS3H4Gdr875SLUm1lFuyqaLlo/s14rdDKt@vger.kernel.org X-Gm-Message-State: AOJu0YyrYoK4ury2aSZwNj6nAzRHkb5l9VhCrGKZMWZZeLlRW6nIDHsf SBG1LXLkxN3APZDE7jYdlqTapa1govMy8sMqwMF6gxp7JrbT06p98b3inWZw4qrrDN+whUan3Go = X-Google-Smtp-Source: AGHT+IEVCUvA4kLgKRzZ3vDr/KBHeqsWpmQJtKxeUYRTf/PK4hHx+6K7t3YF7nEmIdBRHb+IdCV2Zw== X-Received: by 2002:a17:902:c411:b0:202:28b1:9f34 with SMTP id d9443c01a7336-210c6d3c766mr153604875ad.56.1730196150884; Tue, 29 Oct 2024 03:02:30 -0700 (PDT) Received: from wenstp920.tpe.corp.google.com ([2401:fa00:1:10:1fef:f494:7cba:476]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-210bc04532csm62785665ad.254.2024.10.29.03.02.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Oct 2024 03:02:30 -0700 (PDT) From: Chen-Yu Tsai To: Matthias Brugger , AngeloGioacchino Del Regno Cc: Chen-Yu Tsai , devicetree@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH] arm64: dts: mediatek: mt8186-corsola: Fix IT6505 reset line polarity Date: Tue, 29 Oct 2024 18:02:25 +0800 Message-ID: <20241029100226.660263-1-wenst@chromium.org> X-Mailer: git-send-email 2.47.0.163.g1226f6d8fa-goog Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The reset line of the IT6505 bridge chip is active low, not active high. It was incorrectly inverted in the device tree as the implementation at the time incorrectly inverted the polarity in its driver, due to a prior device having an inline inverting level shifter. Fix the polarity now while the external display pipeline is incomplete, thereby avoiding any impact to running systems. A matching fix for the driver should be included if this change is backported. Fixes: 8855d01fb81f ("arm64: dts: mediatek: Add MT8186 Krabby platform based Tentacruel / Tentacool") Cc: Signed-off-by: Chen-Yu Tsai --- The matching driver change can be found at https://lore.kernel.org/all/20241029095411.657616-1-wenst@chromium.org/ arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi b/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi index e3b58641f2c9..43c83620e479 100644 --- a/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi +++ b/arch/arm64/boot/dts/mediatek/mt8186-corsola.dtsi @@ -422,7 +422,7 @@ it6505dptx: dp-bridge@5c { #sound-dai-cells = <0>; ovdd-supply = <&mt6366_vsim2_reg>; pwr18-supply = <&pp1800_dpbrdg_dx>; - reset-gpios = <&pio 177 GPIO_ACTIVE_HIGH>; + reset-gpios = <&pio 177 GPIO_ACTIVE_LOW>; ports { #address-cells = <1>; -- 2.47.0.163.g1226f6d8fa-goog