[PATCH v7 4/5] usb: dwc3: dwc3-qcom: Enable tx-fifo-resize property by default
From: Wesley Cheng <hidden>
Date: 2021-01-29 04:50:48
Also in:
linux-arm-msm, linux-devicetree, lkml
Subsystem:
arm/qualcomm mailing list, designware usb3 drd ip driver, the rest, usb subsystem · Maintainers:
Thinh Nguyen, Linus Torvalds, Greg Kroah-Hartman
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 <redacted> --- drivers/usb/dwc3/dwc3-qcom.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index d803ee9..4ea6be3 100644
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c@@ -564,6 +564,7 @@ static int dwc3_qcom_clk_init(struct dwc3_qcom *qcom, int count) static const struct property_entry dwc3_qcom_acpi_properties[] = { PROPERTY_ENTRY_STRING("dr_mode", "host"), + PROPERTY_ENTRY_BOOL("tx-fifo-resize"), {} };
@@ -634,6 +635,7 @@ 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_child_by_name(np, "dwc3");
@@ -642,6 +644,14 @@ static int dwc3_qcom_of_register_core(struct platform_device *pdev) return -ENODEV; } + prop = kzalloc(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);
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