Merge "dwc3-msm: Add module param to override USB speed"
diff --git a/drivers/usb/dwc3/dwc3-msm.c b/drivers/usb/dwc3/dwc3-msm.c
index 228d8af..abc07cd 100644
--- a/drivers/usb/dwc3/dwc3-msm.c
+++ b/drivers/usb/dwc3/dwc3-msm.c
@@ -69,6 +69,11 @@
module_param(cpu_to_affin, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(cpu_to_affin, "affin usb irq to this cpu");
+/* override for USB speed */
+static int override_usb_speed;
+module_param(override_usb_speed, int, 0644);
+MODULE_PARM_DESC(override_usb_speed, "override for USB speed");
+
/* XHCI registers */
#define USB3_HCSPARAMS1 (0x4)
#define USB3_PORTSC (0x420)
@@ -255,6 +260,15 @@
static void dwc3_pwr_event_handler(struct dwc3_msm *mdwc);
static int dwc3_msm_gadget_vbus_draw(struct dwc3_msm *mdwc, unsigned int mA);
static void dwc3_msm_notify_event(struct dwc3 *dwc, unsigned int event);
+
+static inline bool is_valid_usb_speed(struct dwc3 *dwc, int speed)
+{
+
+ return (((speed == USB_SPEED_FULL) || (speed == USB_SPEED_HIGH) ||
+ (speed == USB_SPEED_SUPER) || (speed == USB_SPEED_SUPER_PLUS))
+ && (speed <= dwc->maximum_speed));
+}
+
/**
*
* Read register with debug info.
@@ -2395,6 +2409,12 @@
if (dwc->maximum_speed > dwc->max_hw_supp_speed)
dwc->maximum_speed = dwc->max_hw_supp_speed;
+ if (override_usb_speed &&
+ is_valid_usb_speed(dwc, override_usb_speed)) {
+ dwc->maximum_speed = override_usb_speed;
+ dbg_event(0xFF, "override_speed", override_usb_speed);
+ }
+
dbg_event(0xFF, "speed", dwc->maximum_speed);
ret = extcon_get_property(edev, extcon_id,