From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
commit 783bda5e41acc71f98336e1a402c180f9748e5dc upstream.
When a USB device is connected to the host controller and
the system enters suspend, the following error happens
in xhci_suspend():
xhci-hcd ee000000.usb: WARN: xHC CMD_RUN timeout
Since the firmware/internal CPU control the USBSTS.STS_HALT
and the process speed is down when the roothub port enters U3,
long delay for the handshake of STS_HALT is neeed in xhci_suspend().
So, this patch adds to set the XHCI_SLOW_SUSPEND.
Fixes: 435cc1138ec9 ("usb: host: xhci-plat: set resume_quirk() for R-Car controllers")
Cc: <stable@xxxxxxxxxxxxxxx> # v4.12+
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/1564734815-17964-1-git-send-email-yoshihiro.shimoda.uh@xxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/host/xhci-rcar.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
--- a/drivers/usb/host/xhci-rcar.c
+++ b/drivers/usb/host/xhci-rcar.c
@@ -231,10 +231,15 @@ int xhci_rcar_init_quirk(struct usb_hcd
* pointers. So, this driver clears the AC64 bit of xhci->hcc_params
* to call dma_set_coherent_mask(dev, DMA_BIT_MASK(32)) in
* xhci_gen_setup().
+ *
+ * And, since the firmware/internal CPU control the USBSTS.STS_HALT
+ * and the process speed is down when the roothub port enters U3,
+ * long delay for the handshake of STS_HALT is neeed in xhci_suspend().
*/
if (xhci_rcar_is_gen2(hcd->self.controller) ||
- xhci_rcar_is_gen3(hcd->self.controller))
- xhci->quirks |= XHCI_NO_64BIT_SUPPORT;
+ xhci_rcar_is_gen3(hcd->self.controller)) {
+ xhci->quirks |= XHCI_NO_64BIT_SUPPORT | XHCI_SLOW_SUSPEND;
+ }
xhci->quirks |= XHCI_TRUST_TX_LENGTH;
return xhci_rcar_download_firmware(hcd);
