linux-kernel - [RFC v5 2/6] arm64: boot: dts: qcom: sm8150: Enable dynamic TX FIFO resize logic

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Date:   Fri, 28 Aug 2020 22:58:42 -0700
From:   Wesley Cheng <wcheng@...eaurora.org>
To:     robh+dt@...nel.org, bjorn.andersson@...aro.org, balbi@...nel.org,
        gregkh@...uxfoundation.org, agross@...nel.org
Cc:     linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-usb@...r.kernel.org,
        jackp@...eaurora.org, Wesley Cheng <wcheng@...eaurora.org>
Subject: [RFC v5 2/6] arm64: boot: dts: qcom: sm8150: Enable dynamic TX FIFO resize logic

Enable the flexible TX FIFO resize logic on SM8150.  Using a larger TX FIFO
SZ can help account for situations when system latency is greater than the
USB bus transmission latency.

Signed-off-by: Wesley Cheng <wcheng@...eaurora.org>
---
 arch/arm64/boot/dts/qcom/sm8150.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/qcom/sm8150.dtsi b/arch/arm64/boot/dts/qcom/sm8150.dtsi
index 7a0c5b419ff0..169ac4c8e298 100644
--- a/arch/arm64/boot/dts/qcom/sm8150.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8150.dtsi
@@ -717,6 +717,7 @@ usb_1_dwc3: dwc3@...0000 {
 				interrupts = <GIC_SPI 133 IRQ_TYPE_LEVEL_HIGH>;
 				snps,dis_u2_susphy_quirk;
 				snps,dis_enblslpm_quirk;
+				tx-fifo-resize;
 				phys = <&usb_1_hsphy>, <&usb_1_ssphy>;
 				phy-names = "usb2-phy", "usb3-phy";
 			};
-- 
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