kernel: 4.19: Backport usb dwc2 lpm mode hw check

[openwrt/staging/blogic.git] / target / linux / generic / backport-4.19 / 200-v5.2-usb-dwc2-Set-lpm-mode-parameters-depend-on-HW-configuration.patch

diff --git a/target/linux/generic/backport-4.19/200-v5.2-usb-dwc2-Set-lpm-mode-parameters-depend-on-HW-configuration.patch b/target/linux/generic/backport-4.19/200-v5.2-usb-dwc2-Set-lpm-mode-parameters-depend-on-HW-configuration.patch
new file mode 100644 (file)
index 0000000..b41bbf5
--- /dev/null
+++ b/target/linux/generic/backport-4.19/200-v5.2-usb-dwc2-Set-lpm-mode-parameters-depend-on-HW-configuration.patch
@@ -0,0 +1,63 @@
+From 28b5c129ca6e585ec95c160ec4297bc6c6360b6f Mon Sep 17 00:00:00 2001
+From: Minas Harutyunyan <minas.harutyunyan@synopsys.com>
+Date: Mon, 4 Mar 2019 17:08:07 +0400
+Subject: usb: dwc2: Set lpm mode parameters depend on HW configuration
+
+If core not supported lpm, i.e. BCM2835 then confusing warnings seen
+in log.
+
+To avoid these warnings, added function dwc2_set_param_lpm() to set
+lpm and other lpm related parameters based on lpm support by core.
+
+Signed-off-by: Minas Harutyunyan <hminas@synopsys.com>
+Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
+---
+ drivers/usb/dwc2/params.c | 23 ++++++++++++++++++-----
+ 1 file changed, 18 insertions(+), 5 deletions(-)
+
+--- a/drivers/usb/dwc2/params.c
++++ b/drivers/usb/dwc2/params.c
+@@ -272,6 +272,23 @@ static void dwc2_set_param_power_down(st
+       hsotg->params.power_down = val;
+ }
+ 
++static void dwc2_set_param_lpm(struct dwc2_hsotg *hsotg)
++{
++      struct dwc2_core_params *p = &hsotg->params;
++
++      p->lpm = hsotg->hw_params.lpm_mode;
++      if (p->lpm) {
++              p->lpm_clock_gating = true;
++              p->besl = true;
++              p->hird_threshold_en = true;
++              p->hird_threshold = 4;
++      } else {
++              p->lpm_clock_gating = false;
++              p->besl = false;
++              p->hird_threshold_en = false;
++      }
++}
++
+ /**
+  * dwc2_set_default_params() - Set all core parameters to their
+  * auto-detected default values.
+@@ -290,6 +307,7 @@ static void dwc2_set_default_params(stru
+       dwc2_set_param_speed(hsotg);
+       dwc2_set_param_phy_utmi_width(hsotg);
+       dwc2_set_param_power_down(hsotg);
++      dwc2_set_param_lpm(hsotg);
+       p->phy_ulpi_ddr = false;
+       p->phy_ulpi_ext_vbus = false;
+ 
+@@ -302,11 +320,6 @@ static void dwc2_set_default_params(stru
+       p->reload_ctl = (hw->snpsid >= DWC2_CORE_REV_2_92a);
+       p->uframe_sched = true;
+       p->external_id_pin_ctl = false;
+-      p->lpm = true;
+-      p->lpm_clock_gating = true;
+-      p->besl = true;
+-      p->hird_threshold_en = true;
+-      p->hird_threshold = 4;
+       p->ipg_isoc_en = false;
+       p->max_packet_count = hw->max_packet_count;
+       p->max_transfer_size = hw->max_transfer_size;