target/linux/ipq806x/patches-4.4/096-02-usb-dwc3-Update-maximum_speed-for-SuperSpeedPlus.patch

   1 From 2c7f1bd9127a1a49ee25d9c2b2ce17b11c7fb05f Mon Sep 17 00:00:00 2001
   2 From: John Youn <John.Youn@synopsys.com>
   3 Date: Fri, 5 Feb 2016 17:08:59 -0800
   4 Subject: usb: dwc3: Update maximum_speed for SuperSpeedPlus
   5
   6 If the maximum_speed is not set, set it to a known value, either
   7 SuperSpeed or SuperSpeedPlus based on the type of controller we are
   8 using. If we are on DWC_usb31 controller, check the PHY interface to see
   9 if it is capable of SuperSpeedPlus.
  10
  11 Also this check is moved after dwc3_core_init() so that we can check
  12 dwc->revision.
  13
  14 Signed-off-by: John Youn <johnyoun@synopsys.com>
  15 Signed-off-by: Felipe Balbi <balbi@kernel.org>
  16 ---
  17  drivers/usb/dwc3/core.c | 17 +++++++++++++----
  18  1 file changed, 13 insertions(+), 4 deletions(-)
  19
  20 --- a/drivers/usb/dwc3/core.c
  21 +++ b/drivers/usb/dwc3/core.c
  22 @@ -962,10 +962,6 @@ static int dwc3_probe(struct platform_de
  23                 fladj = pdata->fladj_value;
  24         }
  25
  26 -       /* default to superspeed if no maximum_speed passed */
  27 -       if (dwc->maximum_speed == USB_SPEED_UNKNOWN)
  28 -               dwc->maximum_speed = USB_SPEED_SUPER;
  29 -
  30         dwc->lpm_nyet_threshold = lpm_nyet_threshold;
  31         dwc->tx_de_emphasis = tx_de_emphasis;
  32
  33 @@ -1016,6 +1012,19 @@ static int dwc3_probe(struct platform_de
  34                 goto err1;
  35         }
  36
  37 +       /* default to superspeed if no maximum_speed passed */
  38 +       if (dwc->maximum_speed == USB_SPEED_UNKNOWN) {
  39 +               dwc->maximum_speed = USB_SPEED_SUPER;
  40 +
  41 +               /*
  42 +                * default to superspeed plus if we are capable.
  43 +                */
  44 +               if (dwc3_is_usb31(dwc) &&
  45 +                   (DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3) ==
  46 +                    DWC3_GHWPARAMS3_SSPHY_IFC_GEN2))
  47 +                       dwc->maximum_speed = USB_SPEED_SUPER_PLUS;
  48 +       }
  49 +
  50         /* Adjust Frame Length */
  51         dwc3_frame_length_adjustment(dwc, fladj);
  52