layerscape: add patches-5.4

Add patches for linux-5.4. The patches are from NXP LSDK-20.04 release
which was tagged LSDK-20.04-V5.4.
https://source.codeaurora.org/external/qoriq/qoriq-components/linux/

For boards LS1021A-IOT, and Traverse-LS1043 which are not involved in
LSDK, port the dts patches from 4.14.

The patches are sorted into the following categories:
  301-arch-xxxx
  302-dts-xxxx
  303-core-xxxx
  701-net-xxxx
  801-audio-xxxx
  802-can-xxxx
  803-clock-xxxx
  804-crypto-xxxx
  805-display-xxxx
  806-dma-xxxx
  807-gpio-xxxx
  808-i2c-xxxx
  809-jailhouse-xxxx
  810-keys-xxxx
  811-kvm-xxxx
  812-pcie-xxxx
  813-pm-xxxx
  814-qe-xxxx
  815-sata-xxxx
  816-sdhc-xxxx
  817-spi-xxxx
  818-thermal-xxxx
  819-uart-xxxx
  820-usb-xxxx
  821-vfio-xxxx

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>

1 files changed, 88 insertions, 0 deletions

diff --git a/target/linux/layerscape/patches-5.4/820-usb-0010-MLK-22675-usb-dwc3-host-disable-park-mode.patch b/target/linux/layerscape/patches-5.4/820-usb-0010-MLK-22675-usb-dwc3-host-disable-park-mode.patch
new file mode 100644
index 0000000000..bca63debf8
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/820-usb-0010-MLK-22675-usb-dwc3-host-disable-park-mode.patch
@@ -0,0 +1,88 @@
+From c5324b25fe98c7a4784248b53a75720b226436c2 Mon Sep 17 00:00:00 2001
+From: Li Jun <jun.li@nxp.com>
+Date: Tue, 29 Oct 2019 17:40:25 +0800
+Subject: [PATCH] MLK-22675 usb: dwc3: host: disable park mode
+
+- Advantage of park mode
+  When only a single Async endpoint is active.
+
+- Behavior of park mode
+  1. The controller prefetches data/TRBs to do 3 * burst_size worth
+     of packets.
+  2. When park mode is disabled there will be some delay between
+     bursts on the USB. This can be avoided if park mode is enabled
+     in cases of only one endpoint is active.
+  3. But this delay is significant only with systems of large
+     latencies.
+  4. We have noticed that in cases where a device NAKs often, it
+     tends to bring down the performance for a single endpoint case.
+
+- Issue on "park mode"
+  1. LSP (List Processor) goes in and out of park mode irrespective
+     of the fact that there are more endpoints active. #LSP consider
+     that there is only one endpoint active.
+  2. This causes master scheduler and transaction handlers to think
+     that they are in park mode even though they are not. This is
+     because request to transaction handlers, generated by HSCH is
+     in park mode when the request is made
+  3. This causes a case where the master scheduler calculates wrongly
+     the number of TRB cache space available.
+  4. Because of the wrongly calculated number of TRB spaces, the core
+     fetches more TRBS than there is space for.
+  5. This causes overwriting the TRB cache area into the TRQ cache
+     area which is next to the TRB cache area.
+  6. This causes invalidating an entry in the TRQ
+  7. This causes transaction handlers to ignore a request in the TRQ
+     which it should have processed.
+  8. This causes the main scheduler to hang because it is waiting for
+     status from transaction handler.
+  9. This causes host controller to hang.
+
+- Work Around
+  Disabling park mode for super speed by setting GUCTL1[17] to be 1.
+
+The STAR number is 9001415732, which is target to be released around
+May,2020.
+
+Reviewed-by: Peter Chen <peter.chen@nxp.com>
+Reviewed-by: Ran Wang <ran.wang_1@nxp.com>
+Signed-off-by: Li Jun <jun.li@nxp.com>
+---
+ drivers/usb/dwc3/core.c | 15 +++++++++++++++
+ drivers/usb/dwc3/core.h |  1 +
+ 2 files changed, 16 insertions(+)
+
+--- a/drivers/usb/dwc3/core.c
++++ b/drivers/usb/dwc3/core.c
+@@ -1030,6 +1030,21 @@ static int dwc3_core_init(struct dwc3 *d
+ 		reg |= DWC3_GUCTL_HSTINAUTORETRY;
+ 
+ 		dwc3_writel(dwc->regs, DWC3_GUCTL, reg);
++
++		/*
++		 * Disable Park Mode for super speed:
++		 * Park mode is used in host mode when only a single async
++		 * endpoint is active, but which has a known issue cause
++		 * USB3.0 HC may die when read and write at the same time,
++		 * considering the advantages of this mode are minimal,
++		 * this issue only impacts super speed and exist on all IP
++		 * versions, disable it for SS, Synopsys will release a formal
++		 * STAR 9001415732, and disable it by default in next IP
++		 * release.
++		 */
++		reg = dwc3_readl(dwc->regs, DWC3_GUCTL1);
++		reg |= DWC3_GUCTL1_PARKMODE_DISABLE_SS;
++		dwc3_writel(dwc->regs, DWC3_GUCTL1, reg);
+ 	}
+ 
+ 	/*
+--- a/drivers/usb/dwc3/core.h
++++ b/drivers/usb/dwc3/core.h
+@@ -253,6 +253,7 @@
+ /* Global User Control 1 Register */
+ #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)
+ 
+ /* Global Status Register */
+ #define DWC3_GSTS_OTG_IP	BIT(10)