target/linux/layerscape/patches-5.4/820-usb-0020-MLK-16604-1-usb-host-xhci-plat-add-XHCI_MISSING_CAS-.patch

   1 From 0767542941c535ebb156087593426bb1fb25e967 Mon Sep 17 00:00:00 2001
   2 From: Li Jun <jun.li@nxp.com>
   3 Date: Tue, 28 Nov 2017 21:43:18 +0800
   4 Subject: [PATCH] MLK-16604-1 usb: host: xhci-plat: add XHCI_MISSING_CAS quirk
   5
   6 i.MX8MQ USB3 host needs XHCI_MISSING_CAS quirk to warm reset the port to
   7 enum the USB3 device plugged in while system sleep, as the port state is
   8 stuck in polling mode after resume.
   9
  10 Signed-off-by: Li Jun <jun.li@nxp.com>
  11 Acked-by: Peter Chen <peter.chen@nxp.com>
  12 (cherry picked from commit 9f1f4316775a061d3ad46c63f84a377e2ffd015d)
  13 ---
  14  drivers/usb/host/xhci-plat.c | 4 ++++
  15  1 file changed, 4 insertions(+)
  16
  17 --- a/drivers/usb/host/xhci-plat.c
  18 +++ b/drivers/usb/host/xhci-plat.c
  19 @@ -291,6 +291,10 @@ static int xhci_plat_probe(struct platfo
  20
  21                 device_property_read_u32(tmpdev, "imod-interval-ns",
  22                                          &xhci->imod_interval);
  23 +
  24 +               if (device_property_read_bool(tmpdev,
  25 +                                             "usb3-resume-missing-cas"))
  26 +                       xhci->quirks |= XHCI_MISSING_CAS;
  27         }
  28
  29         hcd->usb_phy = devm_usb_get_phy_by_phandle(sysdev, "usb-phy", 0);