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Message-ID: <20231220025842.7082-3-chunfeng.yun@mediatek.com>
Date: Wed, 20 Dec 2023 10:58:42 +0800
From: Chunfeng Yun <chunfeng.yun@...iatek.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Rob Herring
	<robh+dt@...nel.org>, Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>, AngeloGioacchino Del Regno
	<angelogioacchino.delregno@...labora.com>
CC: Chunfeng Yun <chunfeng.yun@...iatek.com>, Conor Dooley
	<conor+dt@...nel.org>, Matthias Brugger <matthias.bgg@...il.com>, "Mathias
 Nyman" <mathias.nyman@...el.com>, <linux-usb@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-mediatek@...ts.infradead.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>, Eddie Hung
	<eddie.hung@...iatek.com>, Macpaul Lin <macpaul.lin@...iatek.com>
Subject: [PATCH v3 3/3] arm64: dts: mediatek: mt8195: Add 'rx-fifo-depth' for cherry

Add the quirk property "rx-fifo-depth" to work around Gen1 isoc-in
transfer issue which send out unexpected ACK even after device
already finished the burst transfer with a short patcket, specially
for a 4K camera device.

Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
---
v3: change value according to binding
v2: use 'rx-fifo-depth' property
---
 arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
index dd5b89b73190..58593348b810 100644
--- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi
@@ -1185,6 +1185,7 @@
 
 	vusb33-supply = <&mt6359_vusb_ldo_reg>;
 	vbus-supply = <&usb_vbus>;
+	rx-fifo-depth = <3>;
 };
 
 &xhci1 {
@@ -1192,6 +1193,7 @@
 
 	vusb33-supply = <&mt6359_vusb_ldo_reg>;
 	vbus-supply = <&usb_vbus>;
+	rx-fifo-depth = <3>;
 };
 
 &xhci2 {
-- 
2.18.0


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