target/linux/apm821xx/patches-5.10/100-dwc2-disable-powerdown.patch

   1 From 88ca61467a0897c79b1fbf8f5c30691b43b52613 Mon Sep 17 00:00:00 2001
   2 From: Christian Lamparter <chunkeey@gmail.com>
   3 Date: Sun, 26 Dec 2021 22:36:29 +0200
   4 Subject: [PATCH] dwc2: temporary force to be powered up all times
   5
   6 the APM821xx's onchip dwc2 misbehaves with 5.4 and 5.10
   7 when a USB device gets connected. Instead of announcing
   8 and setting up the USB devices it crashes and burns with:
   9
  10 [   22.023476] dwc2 4bff80000.usbotg: dwc2_restore_global_registers: no global registers to restore
  11 [   22.032245] dwc2 4bff80000.usbotg: dwc2_exit_partial_power_down: failed to restore registers
  12 [   22.040647] dwc2 4bff80000.usbotg: exit partial_power_down failed
  13 [   22.058765] dwc2 4bff80000.usbotg: HC died; cleaning up
  14
  15 This is all seemingly fixed with dwc2 from a 5.16-rc6.
  16
  17 Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
  18 ---
  19
  20 --- a/drivers/usb/dwc2/params.c
  21 +++ b/drivers/usb/dwc2/params.c
  22 @@ -137,6 +137,7 @@ static void dwc2_set_amcc_params(struct
  23         struct dwc2_core_params *p = &hsotg->params;
  24
  25         p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
  26 +       p->power_down = DWC2_POWER_DOWN_PARAM_NONE;
  27  }
  28
  29  static void dwc2_set_stm32f4x9_fsotg_params(struct dwc2_hsotg *hsotg)