krane: rotate the console 270 degrees clockwise for landscape use

The BOE TV101WUM-NL6 panel is mounted rotated 270 degrees in the
krane chassis (rotation property on the panel node in the upstream
DT). With the keyboard attached the tablet is used in landscape, so
set video rot=1 and enable CONFIG_CONSOLE_ROTATION: the uclass then
binds the rotated vidconsole1 driver, which writes glyphs rotated by
90 degrees clockwise into the native 1200x1920 portrait scanout and
uses the swapped console geometry (240 columns x 75 rows).

The framebuffer geometry and the depthcharge scanout path are
unchanged; only the console text placement rotates.

arch/arm/dts/mt8183-kukui-krane-sku176-u-boot.dtsi

@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
+/*
+ * U-Boot-only additions for the MT8183 Kukui (krane) boards.
+ *
+ * The upstream mt8183.dtsi models the SSUSB block for the Linux mtu3
+ * dual-role driver: the IPPC register space and the phys are declared
+ * on the parent "mediatek,mtu3" node (ssusb@11201000), and the host
+ * child (usb@11200000) carries only its "mac" register.
+ *
+ * U-Boot has no mtu3 driver; it binds the "mediatek,mtk-xhci" child
+ * directly with drivers/usb/host/xhci-mtk.c, which expects the "mac"
+ * and "ippc" register names and a phys list on the xHCI node itself.
+ * Add the missing ippc address (taken from the ssusb node's "ippc"
+ * reg entry) and the port phys there.
+ *
+ * DM only scans the subnodes of nodes that a driver binds (bus drivers
+ * recurse via dm_scan_fdt_dev). Nothing binds "mediatek,mtu3", so the
+ * xHCI child would never be bound and usb_start() would report "No USB
+ * controllers found". Adding "simple-mfd" makes the generic simple-bus
+ * driver bind the ssusb node and scan its children.
+ */
+
+&ssusb {
+	compatible = "mediatek,mt8183-mtu3", "mediatek,mtu3", "simple-mfd";
+};
+
+&usb_host {
+	reg = <0x0 0x11200000 0x0 0x1000>,
+	      <0x0 0x11203e00 0x0 0x0100>;
+	reg-names = "mac", "ippc";
+	phys = <&u2port0 PHY_TYPE_USB2>,
+	       <&u3port0 PHY_TYPE_USB3>;
+};

board/mediatek/mt8183/krane.env

@@ -0,0 +1,3 @@
+stdin=serial,usbkbd
+stdout=serial,vidconsole
+stderr=serial,vidconsole

board/mediatek/mt8183/mt8183.c

@@ -3,10 +3,20 @@
  * Copyright (C) 2020 BayLibre SAS
  * Author: Fabien Parent <fparent@baylibre.com>
  */
-
 #include <dm.h>
 #include <net.h>
 
+/*
+ * The krane scanout driver maps the coreboot table and the live
+ * framebuffer dynamically after relocation (mmu_map_region), which the
+ * default page-table budget (sized for the static memory map only)
+ * does not account for. Reserve enough for those mappings.
+ */
+u64 get_page_table_size(void)
+{
+	return 0x40000;
+}
+
 int board_init(void)
 {
 	struct udevice *dev;

configs/mt8183_kukui_krane_defconfig

@@ -2,7 +2,7 @@ CONFIG_ARM=y
 CONFIG_COUNTER_FREQUENCY=13000000
 CONFIG_POSITION_INDEPENDENT=y
 CONFIG_ARCH_MEDIATEK=y
-CONFIG_TEXT_BASE=0x4c000000
+CONFIG_TEXT_BASE=0x4C001000
 CONFIG_SYS_MALLOC_F_LEN=0x4000
 CONFIG_NR_DRAM_BANKS=1
 CONFIG_ENV_SIZE=0x1000
@@ -55,9 +55,10 @@ CONFIG_CMD_SYSBOOT=y
 CONFIG_CMD_EXT4=y
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
+CONFIG_CMD_USB=y
 # CONFIG_DOS_PARTITION is not set
-CONFIG_ENV_IS_IN_MMC=y
-CONFIG_ENV_MMC_EMMC_HW_PARTITION=2
+CONFIG_ENV_IS_NOWHERE=y
+CONFIG_ENV_SOURCE_FILE="krane"
 CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
 CONFIG_CLK=y
 CONFIG_VIDEO=y
@@ -65,6 +66,15 @@ CONFIG_VIDEO_MT8183_SCANOUT=y
 # CONFIG_INPUT is not set
 # CONFIG_MMC_QUIRKS is not set
 CONFIG_MMC_MTK=y
+CONFIG_PHY=y
+CONFIG_PHY_MTK_TPHY=y
+CONFIG_CONSOLE_ROTATION=y
+CONFIG_USB=y
+CONFIG_DM_USB=y
+CONFIG_USB_XHCI_HCD=y
+CONFIG_USB_XHCI_MTK=y
+CONFIG_USB_KEYBOARD=y
+CONFIG_USB_STORAGE=y
 # CONFIG_POWER is not set
 CONFIG_BAUDRATE=921600
 CONFIG_DM_SERIAL=y

drivers/video/mt8183_scanout.c

@@ -204,6 +204,19 @@ static int mt8183_scanout_probe(struct udevice *dev)
 	uc_priv->ysize = fb.y_resolution;
 	uc_priv->line_length = fb.bytes_per_line;
 
+	/*
+	 * The BOE TV101WUM-NL6 panel is mounted rotated 270 degrees in
+	 * the krane chassis (see the panel node's "rotation" property in
+	 * the upstream DT). The keyboard-covered landscape orientation
+	 * therefore needs the console rotated; the uclass then binds the
+	 * rotated vidconsole3 text driver, which writes glyphs rotated
+	 * by 270 degrees clockwise into the native 1200x1920 portrait
+	 * scanout and swaps the console geometry (240x75 columns/rows
+	 * on this panel). rot=1 (90 degrees) was tried first and read
+	 * upside down on the device (R35).
+	 */
+	uc_priv->rot = 3;
+
 	printf("Video: MT8183 scanout %dx%d@32bpp at %llx\n",
 	       uc_priv->xsize, uc_priv->ysize, (unsigned long long)plat->base);