linux-kernel - [RFC v4 2/3] arm64: boot: dts: qcom: sm8150: Enable dynamic TX FIFO resize logic

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Date:   Tue, 23 Jun 2020 19:28:47 -0700
From:   Wesley Cheng <wcheng@...eaurora.org>
To:     agross@...nel.org, bjorn.andersson@...aro.org, balbi@...nel.org,
        gregkh@...uxfoundation.org, robh+dt@...nel.org
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-usb@...r.kernel.org,
        jackp@...eaurora.org, Wesley Cheng <wcheng@...eaurora.org>
Subject: [RFC v4 2/3] 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 a36512d1f6a1..c28523313955 100644
--- a/arch/arm64/boot/dts/qcom/sm8150.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8150.dtsi
@@ -708,6 +708,7 @@ 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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