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-rw-r--r--src/soc/intel/broadwell/xhci.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/soc/intel/broadwell/xhci.c b/src/soc/intel/broadwell/xhci.c
index cfd0c5692d..9d0390e1a2 100644
--- a/src/soc/intel/broadwell/xhci.c
+++ b/src/soc/intel/broadwell/xhci.c
@@ -179,6 +179,15 @@ void usb_xhci_sleep_prepare(device_t dev, u8 slp_typ)
reg32 = read32(mem_base + 0x80e0);
reg32 |= (1 << 15);
write32(mem_base + 0x80e0, reg32);
+ } else {
+ /*
+ * Clear port change status bits. Clearing CSC alone seemed to
+ * fix wakeup from S3 if entering USB compliance state even if
+ * bit wasn't set on the port.
+ */
+ int port;
+ for (port = 0; port < usb_xhci_port_count_usb3(dev); port++)
+ usb_xhci_reset_status_usb3(mem_base, port);
}
reg32 = read32(mem_base + 0x8154);