usb: dwc3: dwc3-qcom: Enable tx-fifo-resize property by default

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>
Link: https://lore.kernel.org/r/1625908395-5498-6-git-send-email-wcheng@codeaurora.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index 49e6ca9..2223b59 100644 (file)
--- 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 +654,20 @@ static int dwc3_qcom_of_register_core(struct platform_device *pdev)
                return -ENODEV;
        }
 
+       prop = devm_kzalloc(dev, sizeof(*prop), GFP_KERNEL);
+       if (!prop) {
+               ret = -ENOMEM;
+               dev_err(dev, "unable to allocate memory for property\n");
+               goto node_put;
+       }
+
+       prop->name = "tx-fifo-resize";
+       ret = of_add_property(dwc3_np, prop);
+       if (ret) {
+               dev_err(dev, "unable to add property\n");
+               goto node_put;
+       }
+
        ret = of_platform_populate(np, NULL, NULL, dev);
        if (ret) {
                dev_err(dev, "failed to register dwc3 core - %d\n", ret);