Correctly disable USB3 DWC controller parkmode

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

patches/linux-LSDK-20.12/0009-lx2160a-dwc3-dts-disable-usb3-parkmode.patch

+From 704c3a0a194839782f5faad9a0b9151503b602fd Mon Sep 17 00:00:00 2001
+From: Rabeeh Khoury <rabeeh@solid-run.com>
+Date: Mon, 18 Jan 2021 09:32:57 +0200
+Subject: [PATCH] lx2160a: dwc3: dts: disable usb3 parkmode
+
+Signed-off-by: Rabeeh Khoury <rabeeh@solid-run.com>
+---
+ arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi b/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi
+index 2fe86aca3..709a1a95a 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;
+ 			dma-coherent;
+ 			status = "disabled";
+ 		};
+-- 
+2.25.1
+

patches/linux-LSDK-20.12/0009-usb-dwc3-core-add-support-for-disabling-SS-instances.patch

-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
-
-   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.
-     xhci-hcd xhci-hcd.0.auto: Host halt failed, -110
-     xhci-hcd xhci-hcd.0.auto: xHCI host controller not responding, assume dead
-     xhci-hcd xhci-hcd.0.auto: xHCI host not responding to stop endpoint command.
-     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>
-    Cc: Jun Li <lijun.kernel@gmail.com>
-    Reported-by: Tim <elatllat@gmail.com>
-    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 5ed5a57f3..870f9cb14 100644
---- a/drivers/usb/dwc3/core.c
-+++ b/drivers/usb/dwc3/core.c
-@@ -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;
- 
-+		if (dwc->parkmode_disable_ss_quirk)
-+			reg |= DWC3_GUCTL1_PARKMODE_DISABLE_SS;
-+
- 		dwc3_writel(dwc->regs, DWC3_GUCTL1, reg);
- 	}
- 
-@@ -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");
-+	dwc->parkmode_disable_ss_quirk = device_property_read_bool(dev,
-+				"snps,parkmode-disable-ss-quirk");
- 
- 	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 1ea3c50d2..63f0b5fb3 100644
---- a/drivers/usb/dwc3/core.h
-+++ b/drivers/usb/dwc3/core.h
-@@ -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)
- #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.
-+ * @parkmode_disable_ss_quirk: set if we need to disable all SuperSpeed
-+ *			instances in park mode.
-  * @tx_de_emphasis_quirk: set if we enable Tx de-emphasis quirk
-  * @tx_de_emphasis: Tx de-emphasis value
-  * 	0	- -6dB de-emphasis
-@@ -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;
-+	unsigned		parkmode_disable_ss_quirk:1;
- 
- 	unsigned		tx_de_emphasis_quirk:1;
- 	unsigned		tx_de_emphasis:2;
--- 
-2.25.1
-