target/linux/generic/backport-4.19/200-v5.2-usb-dwc2-Set-lpm-mode-parameters-depend-on-HW-configuration.patch

   1 From 28b5c129ca6e585ec95c160ec4297bc6c6360b6f Mon Sep 17 00:00:00 2001
   2 From: Minas Harutyunyan <minas.harutyunyan@synopsys.com>
   3 Date: Mon, 4 Mar 2019 17:08:07 +0400
   4 Subject: usb: dwc2: Set lpm mode parameters depend on HW configuration
   5
   6 If core not supported lpm, i.e. BCM2835 then confusing warnings seen
   7 in log.
   8
   9 To avoid these warnings, added function dwc2_set_param_lpm() to set
  10 lpm and other lpm related parameters based on lpm support by core.
  11
  12 Signed-off-by: Minas Harutyunyan <hminas@synopsys.com>
  13 Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
  14 ---
  15  drivers/usb/dwc2/params.c | 23 ++++++++++++++++++-----
  16  1 file changed, 18 insertions(+), 5 deletions(-)
  17
  18 --- a/drivers/usb/dwc2/params.c
  19 +++ b/drivers/usb/dwc2/params.c
  20 @@ -273,6 +273,23 @@ static void dwc2_set_param_power_down(st
  21         hsotg->params.power_down = val;
  22  }
  23
  24 +static void dwc2_set_param_lpm(struct dwc2_hsotg *hsotg)
  25 +{
  26 +       struct dwc2_core_params *p = &hsotg->params;
  27 +
  28 +       p->lpm = hsotg->hw_params.lpm_mode;
  29 +       if (p->lpm) {
  30 +               p->lpm_clock_gating = true;
  31 +               p->besl = true;
  32 +               p->hird_threshold_en = true;
  33 +               p->hird_threshold = 4;
  34 +       } else {
  35 +               p->lpm_clock_gating = false;
  36 +               p->besl = false;
  37 +               p->hird_threshold_en = false;
  38 +       }
  39 +}
  40 +
  41  /**
  42   * dwc2_set_default_params() - Set all core parameters to their
  43   * auto-detected default values.
  44 @@ -291,6 +308,7 @@ static void dwc2_set_default_params(stru
  45         dwc2_set_param_speed(hsotg);
  46         dwc2_set_param_phy_utmi_width(hsotg);
  47         dwc2_set_param_power_down(hsotg);
  48 +       dwc2_set_param_lpm(hsotg);
  49         p->phy_ulpi_ddr = false;
  50         p->phy_ulpi_ext_vbus = false;
  51
  52 @@ -303,11 +321,6 @@ static void dwc2_set_default_params(stru
  53         p->reload_ctl = (hw->snpsid >= DWC2_CORE_REV_2_92a);
  54         p->uframe_sched = true;
  55         p->external_id_pin_ctl = false;
  56 -       p->lpm = true;
  57 -       p->lpm_clock_gating = true;
  58 -       p->besl = true;
  59 -       p->hird_threshold_en = true;
  60 -       p->hird_threshold = 4;
  61         p->ipg_isoc_en = false;
  62         p->max_packet_count = hw->max_packet_count;
  63         p->max_transfer_size = hw->max_transfer_size;