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From: Wesley Cheng <wcheng@codeaurora.org>
To: balbi@kernel.org, gregkh@linuxfoundation.org, agross@kernel.org,
	bjorn.andersson@linaro.org, robh+dt@kernel.org
Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
	jackp@codeaurora.org, Thinh.Nguyen@synopsys.com,
	Wesley Cheng <wcheng@codeaurora.org>
Subject: [PATCH v8 4/5] usb: dwc3: dwc3-qcom: Enable tx-fifo-resize property by default
Date: Wed, 19 May 2021 00:43:57 -0700	[thread overview]
Message-ID: <1621410238-31395-5-git-send-email-wcheng@codeaurora.org> (raw)
In-Reply-To: <1621410238-31395-1-git-send-email-wcheng@codeaurora.org>

In order to take advantage of the TX fifo resizing logic, manually add
these properties to the DWC3 child node by default.  This will allow
the DWC3 gadget to resize the TX fifos for the IN endpoints, which
help with performance.

Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>
---
 drivers/usb/dwc3/dwc3-qcom.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index 49e6ca9..44e0eaa1 100644
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -645,6 +645,7 @@ static int dwc3_qcom_of_register_core(struct platform_device *pdev)
 	struct dwc3_qcom	*qcom = platform_get_drvdata(pdev);
 	struct device_node	*np = pdev->dev.of_node, *dwc3_np;
 	struct device		*dev = &pdev->dev;
+	struct property		*prop;
 	int			ret;
 
 	dwc3_np = of_get_compatible_child(np, "snps,dwc3");
@@ -653,6 +654,14 @@ static int dwc3_qcom_of_register_core(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
+	prop = devm_kzalloc(dev, sizeof(*prop), GFP_KERNEL);
+	if (prop) {
+		prop->name = "tx-fifo-resize";
+		ret = of_add_property(dwc3_np, prop);
+		if (ret < 0)
+			dev_info(dev, "unable to add tx-fifo-resize prop\n");
+	}
+
 	ret = of_platform_populate(np, NULL, NULL, dev);
 	if (ret) {
 		dev_err(dev, "failed to register dwc3 core - %d\n", ret);
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project


  parent reply	other threads:[~2021-05-19  7:44 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-19  7:43 [PATCH v8 0/5] Re-introduce TX FIFO resize for larger EP bursting Wesley Cheng
2021-05-19  7:43 ` [PATCH v8 1/5] usb: gadget: udc: core: Introduce check_config to verify USB configuration Wesley Cheng
2021-05-19  7:43 ` [PATCH v8 2/5] usb: gadget: configfs: Check USB configuration before adding Wesley Cheng
2021-05-19  7:43 ` [PATCH v8 3/5] usb: dwc3: Resize TX FIFOs to meet EP bursting requirements Wesley Cheng
2021-05-19  7:43 ` Wesley Cheng [this message]
2021-05-19  7:43 ` [PATCH v8 5/5] arm64: boot: dts: qcom: sm8150: Enable dynamic TX FIFO resize logic Wesley Cheng
2021-05-29 17:07   ` Bjorn Andersson
2021-05-29 19:24     ` Jack Pham
2021-05-29  0:40 ` [PATCH v8 0/5] Re-introduce TX FIFO resize for larger EP bursting Wesley Cheng

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