backport of the usb 3.0 designware parkmode workaround

Signed-off-by: Rabeeh Khoury <rabeeh@solid-run.com>

patches/linux-LSDK-20.04/7ba6b09fda5e0cb741ee56f3264665e0edc64822.patch → patches/linux-LSDK-20.04/0009-usb-dwc3-core-add-support-for-disabling-SS-instances.patc

+From 2ce0d3a0c1e218d6e680115da21a0e9c180db845 Mon Sep 17 00:00:00 2001
+From: Rabeeh Khoury <rabeeh@solid-run.com>
+Date: Wed, 28 Oct 2020 20:06:16 +0200
+Subject: [PATCH] usb: dwc3: core: add support for disabling SS instances in
+ park mode
+
+This is a backport from mainline -
 commit 7ba6b09fda5e0cb741ee56f3264665e0edc64822
 Author: Neil Armstrong <narmstrong@baylibre.com>
 Date:   Fri Feb 21 10:15:31 2020 +0100
 
-    usb: dwc3: core: add support for disabling SS instances in park mode
-    
-    In certain circumstances, the XHCI SuperSpeed instance in park mode
+   In certain circumstances, the XHCI SuperSpeed instance in park mode
     can fail to recover, thus on Amlogic G12A/G12B/SM1 SoCs when there is high
     load on the single XHCI SuperSpeed instance, the controller can crash like:
      xhci-hcd xhci-hcd.0.auto: xHCI host not responding to stop endpoint command.
@@ -14,18 +19,18 @@ Date:   Fri Feb 21 10:15:31 2020 +0100
      hub 2-1.1:1.0: hub_ext_port_status failed (err = -22)
      xhci-hcd xhci-hcd.0.auto: HC died; cleaning up
      usb 2-1.1-port1: cannot reset (err = -22)
-    
+
     Setting the PARKMODE_DISABLE_SS bit in the DWC3_USB3_GUCTL1 mitigates
     the issue. The bit is described as :
     "When this bit is set to '1' all SS bus instances in park mode are disabled"
-    
+
     Synopsys explains:
     The GUCTL1.PARKMODE_DISABLE_SS is only available in
     dwc_usb3 controller running in host mode.
     This should not be set for other IPs.
     This can be disabled by default based on IP, but I recommend to have a
     property to enable this feature for devices that need this.
-    
+
     CC: Dongjin Kim <tobetter@gmail.com>
     Cc: Jianxin Pan <jianxin.pan@amlogic.com>
     Cc: Thinh Nguyen <thinhn@synopsys.com>
@@ -34,11 +39,38 @@ Date:   Fri Feb 21 10:15:31 2020 +0100
     Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
     Signed-off-by: Felipe Balbi <balbi@kernel.org>
 
+Signed-off-by: Rabeeh Khoury <rabeeh@solid-run.com>
+---
+ arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi | 2 ++
+ drivers/usb/dwc3/core.c                        | 5 +++++
+ drivers/usb/dwc3/core.h                        | 4 ++++
+ 3 files changed, 11 insertions(+)
+
+diff --git a/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi b/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi
+index fe9b8bf4d..201bc2292 100644
+--- a/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi
++++ b/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi
+@@ -994,6 +994,7 @@
+ 			snps,dis_rxdet_inp3_quirk;
+ 			snps,incr-burst-type-adjustment = <1>, <4>, <8>, <16>;
+ 			snps,host-vbus-glitches;
++			snps,parkmode-disable-ss-quirk;
+ 			dma-coherent;
+ 			status = "disabled";
+ 		};
+@@ -1009,6 +1010,7 @@
+ 			snps,dis_rxdet_inp3_quirk;
+ 			snps,incr-burst-type-adjustment = <1>, <4>, <8>, <16>;
+ 			snps,host-vbus-glitches;
++			snps,parkmode-disable-ss-quirk;
+ 			status = "disabled";
+ 		};
+ 
 diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
-index 1d85c42b9c67..43bd5b1ea9e2 100644
+index 5ed5a57f3..870f9cb14 100644
 --- a/drivers/usb/dwc3/core.c
 +++ b/drivers/usb/dwc3/core.c
-@@ -1029,6 +1029,9 @@ static int dwc3_core_init(struct dwc3 *dwc)
+@@ -1064,6 +1064,9 @@ static int dwc3_core_init(struct dwc3 *dwc)
  		if (dwc->dis_tx_ipgap_linecheck_quirk)
  			reg |= DWC3_GUCTL1_TX_IPGAP_LINECHECK_DIS;
  
@@ -48,7 +80,7 @@ index 1d85c42b9c67..43bd5b1ea9e2 100644
  		dwc3_writel(dwc->regs, DWC3_GUCTL1, reg);
  	}
  
-@@ -1342,6 +1345,8 @@ static void dwc3_get_properties(struct dwc3 *dwc)
+@@ -1400,6 +1403,8 @@ static void dwc3_get_properties(struct dwc3 *dwc)
  				"snps,dis-del-phy-power-chg-quirk");
  	dwc->dis_tx_ipgap_linecheck_quirk = device_property_read_bool(dev,
  				"snps,dis-tx-ipgap-linecheck-quirk");
@@ -58,18 +90,18 @@ index 1d85c42b9c67..43bd5b1ea9e2 100644
  	dwc->tx_de_emphasis_quirk = device_property_read_bool(dev,
  				"snps,tx_de_emphasis_quirk");
 diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
-index 77c4a9abe365..3ecc69c5b150 100644
+index 1ea3c50d2..63f0b5fb3 100644
 --- a/drivers/usb/dwc3/core.h
 +++ b/drivers/usb/dwc3/core.h
-@@ -249,6 +249,7 @@
+@@ -266,6 +266,7 @@
  #define DWC3_GUCTL_HSTINAUTORETRY	BIT(14)
  
  /* Global User Control 1 Register */
 +#define DWC3_GUCTL1_PARKMODE_DISABLE_SS	BIT(17)
  #define DWC3_GUCTL1_TX_IPGAP_LINECHECK_DIS	BIT(28)
  #define DWC3_GUCTL1_DEV_L1_EXIT_BY_HW	BIT(24)
- 
-@@ -1024,6 +1025,8 @@ struct dwc3_scratchpad_array {
+ #define DWC3_GUCTL1_PARKMODE_DISABLE_SS	BIT(17)
+@@ -1041,6 +1042,8 @@ struct dwc3_scratchpad_array {
   *			change quirk.
   * @dis_tx_ipgap_linecheck_quirk: set if we disable u2mac linestate
   *			check during HS transmit.
@@ -78,7 +110,7 @@ index 77c4a9abe365..3ecc69c5b150 100644
   * @tx_de_emphasis_quirk: set if we enable Tx de-emphasis quirk
   * @tx_de_emphasis: Tx de-emphasis value
   * 	0	- -6dB de-emphasis
-@@ -1215,6 +1218,7 @@ struct dwc3 {
+@@ -1236,6 +1239,7 @@ struct dwc3 {
  	unsigned		dis_u2_freeclk_exists_quirk:1;
  	unsigned		dis_del_phy_power_chg_quirk:1;
  	unsigned		dis_tx_ipgap_linecheck_quirk:1;
@@ -86,3 +118,6 @@ index 77c4a9abe365..3ecc69c5b150 100644
  
  	unsigned		tx_de_emphasis_quirk:1;
  	unsigned		tx_de_emphasis:2;
+-- 
+2.25.1
+