From: Pin-yen Lin <treapking@chromium.org>
To: Matthias Brugger <matthias.bgg@gmail.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com>
Cc: devicetree@vger.kernel.org (open list:OPEN FIRMWARE AND
FLATTENED DEVICE TREE BINDINGS),
linux-arm-kernel@lists.infradead.org (moderated
list:ARM/Mediatek SoC support),
linux-mediatek@lists.infradead.org (moderated list:ARM/Mediatek
SoC support),
"Nícolas F . R . A . Prado" <nfraprado@collabora.com>,
linux-kernel@vger.kernel.org (open list:ARM/Mediatek SoC support),
"Hsin-Te Yuan" <yuanhsinte@chromium.org>,
"Pin-yen Lin" <treapking@chromium.org>
Subject: [PATCH] arm64: dts: mediatek: mt8192-asurada: Add off-on-delay-us for pp3300_mipibrdg
Date: Mon, 29 Apr 2024 17:53:31 +0800 [thread overview]
Message-ID: <20240429095333.3585438-1-treapking@chromium.org> (raw)
Set off-on-delay-us to 500000 us for pp3300_mipibrdg to make sure it
complies with the panel sequence. Explicit configuration on the
regulator node is required because mt8192-asurada uses the same power
supply for the panel and the anx7625 DP bridge. So powering on/off the
DP bridge could break the power sequence requirement for the panel.
Fixes: f9f00b1f6b9b ("arm64: dts: mediatek: asurada: Add display regulators")
Signed-off-by: Pin-yen Lin <treapking@chromium.org>
---
arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
index 7a704246678f..08d71ddf3668 100644
--- a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
@@ -147,6 +147,7 @@ pp3300_mipibrdg: regulator-3v3-mipibrdg {
regulator-boot-on;
gpio = <&pio 127 GPIO_ACTIVE_HIGH>;
vin-supply = <&pp3300_g>;
+ off-on-delay-us = <500000>;
};
/* separately switched 3.3V power rail */
--
2.44.0.769.g3c40516874-goog
WARNING: multiple messages have this Message-ID (diff)
From: Pin-yen Lin <treapking@chromium.org>
To: Matthias Brugger <matthias.bgg@gmail.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com>
Cc: devicetree@vger.kernel.org (open list:OPEN FIRMWARE AND
FLATTENED DEVICE TREE BINDINGS),
linux-arm-kernel@lists.infradead.org (moderated
list:ARM/Mediatek SoC support),
linux-mediatek@lists.infradead.org (moderated list:ARM/Mediatek
SoC support),
"Nícolas F . R . A . Prado" <nfraprado@collabora.com>,
linux-kernel@vger.kernel.org (open list:ARM/Mediatek SoC support),
"Hsin-Te Yuan" <yuanhsinte@chromium.org>,
"Pin-yen Lin" <treapking@chromium.org>
Subject: [PATCH] arm64: dts: mediatek: mt8192-asurada: Add off-on-delay-us for pp3300_mipibrdg
Date: Mon, 29 Apr 2024 17:53:31 +0800 [thread overview]
Message-ID: <20240429095333.3585438-1-treapking@chromium.org> (raw)
Set off-on-delay-us to 500000 us for pp3300_mipibrdg to make sure it
complies with the panel sequence. Explicit configuration on the
regulator node is required because mt8192-asurada uses the same power
supply for the panel and the anx7625 DP bridge. So powering on/off the
DP bridge could break the power sequence requirement for the panel.
Fixes: f9f00b1f6b9b ("arm64: dts: mediatek: asurada: Add display regulators")
Signed-off-by: Pin-yen Lin <treapking@chromium.org>
---
arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
index 7a704246678f..08d71ddf3668 100644
--- a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
@@ -147,6 +147,7 @@ pp3300_mipibrdg: regulator-3v3-mipibrdg {
regulator-boot-on;
gpio = <&pio 127 GPIO_ACTIVE_HIGH>;
vin-supply = <&pp3300_g>;
+ off-on-delay-us = <500000>;
};
/* separately switched 3.3V power rail */
--
2.44.0.769.g3c40516874-goog
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next reply other threads:[~2024-04-29 9:54 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-29 9:53 Pin-yen Lin [this message]
2024-04-29 9:53 ` [PATCH] arm64: dts: mediatek: mt8192-asurada: Add off-on-delay-us for pp3300_mipibrdg Pin-yen Lin
2024-04-30 8:17 ` AngeloGioacchino Del Regno
2024-04-30 8:17 ` AngeloGioacchino Del Regno
2024-04-30 9:32 ` Pin-yen Lin
2024-04-30 9:32 ` Pin-yen Lin
2024-04-30 9:52 ` AngeloGioacchino Del Regno
2024-04-30 9:52 ` AngeloGioacchino Del Regno
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