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, 74 insertions, 0 deletions

diff --git a/target/linux/layerscape/patches-5.4/805-display-0052-LF-323-1-drm-bridge-cdns-move-link-training-to-bridg.patch b/target/linux/layerscape/patches-5.4/805-display-0052-LF-323-1-drm-bridge-cdns-move-link-training-to-bridg.patch
new file mode 100644
index 0000000000..4dcd5c86d6
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/805-display-0052-LF-323-1-drm-bridge-cdns-move-link-training-to-bridg.patch
@@ -0,0 +1,74 @@
+From fa76cd6f0ed305fb2870083842b1ff7bcf027655 Mon Sep 17 00:00:00 2001
+From: Sandor Yu <Sandor.yu@nxp.com>
+Date: Mon, 9 Dec 2019 17:52:35 +0800
+Subject: [PATCH] LF-323-1: drm/bridge/cdns: move link training to bridge
+ enable function
+
+Move link training and video enable functions from mode_set to
+bridge_enable. it is more reasonable.
+cdns_dp_mode_set don't needed in HPD thread, DP link training will
+resetup in bridge_enable when cable connecting.
+
+Signed-off-by: Sandor Yu <Sandor.yu@nxp.com>
+Reviewed-by: Robby Cai <robby.cai@nxp.com>
+---
+ drivers/gpu/drm/bridge/cadence/cdns-dp-core.c | 34 +++++++++++++--------------
+ 1 file changed, 16 insertions(+), 18 deletions(-)
+
+--- a/drivers/gpu/drm/bridge/cadence/cdns-dp-core.c
++++ b/drivers/gpu/drm/bridge/cadence/cdns-dp-core.c
+@@ -178,19 +178,6 @@ static void cdns_dp_mode_set(struct cdns
+ 		return;
+ 	}
+ 
+-	/* Link trainning */
+-	ret = cdns_mhdp_train_link(mhdp);
+-	if (ret) {
+-		DRM_DEV_ERROR(mhdp->dev, "Failed link train %d\n", ret);
+-		return;
+-	}
+-
+-	ret = cdns_mhdp_set_video_status(mhdp, CONTROL_VIDEO_VALID);
+-	if (ret) {
+-		DRM_DEV_ERROR(mhdp->dev, "Failed to valid video %d\n", ret);
+-		return;
+-	}
+-
+ 	return;
+ }
+ 
+@@ -339,6 +326,21 @@ static void cdns_dp_bridge_mode_set(stru
+ 
+ static void cdn_hdp_bridge_enable(struct drm_bridge *bridge)
+ {
++	struct cdns_mhdp_device *mhdp = bridge->driver_private;
++	int ret;
++
++	/* Link trainning */
++	ret = cdns_mhdp_train_link(mhdp);
++	if (ret) {
++		DRM_DEV_ERROR(mhdp->dev, "Failed link train %d\n", ret);
++		return;
++	}
++
++	ret = cdns_mhdp_set_video_status(mhdp, CONTROL_VIDEO_VALID);
++	if (ret) {
++		DRM_DEV_ERROR(mhdp->dev, "Failed to valid video %d\n", ret);
++		return;
++	}
+ }
+ 
+ static void cdn_hdp_bridge_disable(struct drm_bridge *bridge)
+@@ -366,11 +368,7 @@ static void hotplug_work_func(struct wor
+ 	drm_helper_hpd_irq_event(connector->dev);
+ 
+ 	if (connector->status == connector_status_connected) {
+-		/* reset video mode after cable plugin */
+-		mutex_lock(&mhdp->lock);
+-		cdns_dp_mode_set(mhdp);
+-		mutex_unlock(&mhdp->lock);
+-
++		/* Cable connedted  */
+ 		DRM_INFO("HDMI/DP Cable Plug In\n");
+ 		enable_irq(mhdp->irq[IRQ_OUT]);
+ 	} else if (connector->status == connector_status_disconnected) {