Update u-boot-s905x-s912 binary to a new build (#4947)

Previously, the u-boot binary files used to chainload u-boot for the
amlogic tv boxes were the ones produced by balbes150 in his old
tv box builds.  There was no source code for them.
This commit is the first to convert from those old binary files
to newly built ones along with a u-boot patch file and instructions
on how to build/rebuild them.  Eventually this needs to be incorporated into
the build framework to automate it.  But for now one step at a time.

 Changes to be committed:
	new file:   packages/bsp/aml-s9xx-box/boot/build-u-boot/readme.txt
	new file:   packages/bsp/aml-s9xx-box/boot/build-u-boot/u-boot-s905x-s912.patch
	deleted:    packages/bsp/aml-s9xx-box/boot/u-boot-readme.txt
	modified:   packages/bsp/aml-s9xx-box/boot/u-boot-s905x-s912

Co-authored-by: Igor Pečovnik <igor@armbian.com>

packages/bsp/aml-s9xx-box/boot/build-u-boot/readme.txt

@@ -0,0 +1,30 @@
+The u-boot binary files included in this distribution are the ones originally 
+built by @balbes150 as part of his former TV Box builds 
+based on work by @hexdump
+
+We shouldn't be releasing binary blobs of unknown source code origin, 
+however as these are what has been the norm for the amlogic TV box builds
+in the past, we are continuing with that as the status quo, until something
+better is put in place.
+
+These binaries should be recreated from scratch and either built 
+automatically as part of the Armbian build process, or at least instructions 
+should be provided here as to how to rebuild them from source.
+
+Update (3/13/23):
+Instructions for building u-boot-s905x-s912 from source
+(This is based on the work of @hexdump that can be found here:
+https://github.com/hexdump0815/u-boot-misc/blob/master/readme.gxl)
+
+git clone https://gitlab.denx.de/u-boot/u-boot.git/
+cd u-boot
+git checkout v2020.07
+patch -p1 < /path/to/u-boot-s905x-s912.patch
+make libretech-cc_defconfig
+make
+cp u-boot.bin u-boot-s905x-s912
+
+
+TODO: rebuild u-boot-s905 and u-boot-s905x2-s922 from source
+TODO: add a s905x3 specific u-boot variant
+TODO: automate the manual build process in the armbian build framework

packages/bsp/aml-s9xx-box/boot/build-u-boot/u-boot-s905x-s912.patch

@@ -0,0 +1,109 @@
+diff --git a/arch/arm/dts/meson-gxl-s905x-libretech-cc.dts b/arch/arm/dts/meson-gxl-s905x-libretech-cc.dts
+index e8348b2728..b24a939959 100644
+--- a/arch/arm/dts/meson-gxl-s905x-libretech-cc.dts
++++ b/arch/arm/dts/meson-gxl-s905x-libretech-cc.dts
+@@ -14,7 +14,7 @@
+ / {
+ 	compatible = "libretech,aml-s905x-cc", "amlogic,s905x",
+ 		     "amlogic,meson-gxl";
+-	model = "Libre Computer AML-S905X-CC";
++	model = "Armbian aml-s9xx-box u-boot s905x-s912";
+ 
+ 	aliases {
+ 		serial0 = &uart_AO;
+@@ -55,17 +55,18 @@
+ 		compatible = "gpio-leds";
+ 
+ 		system {
+-			label = "librecomputer:system-status";
++//			label = "librecomputer:system-status";
++			label = "system-status";
+ 			gpios = <&gpio GPIODV_24 GPIO_ACTIVE_HIGH>;
+ 			default-state = "on";
+ 			panic-indicator;
+ 		};
+ 
+-		blue {
+-			label = "librecomputer:blue";
+-			gpios = <&gpio_ao GPIOAO_2 GPIO_ACTIVE_HIGH>;
+-			linux,default-trigger = "heartbeat";
+-		};
++//		blue {
++//			label = "librecomputer:blue";
++//			gpios = <&gpio_ao GPIOAO_2 GPIO_ACTIVE_HIGH>;
++//			linux,default-trigger = "heartbeat";
++//		};
+ 	};
+ 
+ 	memory@0 {
+diff --git a/configs/libretech-cc_defconfig b/configs/libretech-cc_defconfig
+index 48e8800ce4..d3b779f2e8 100644
+--- a/configs/libretech-cc_defconfig
++++ b/configs/libretech-cc_defconfig
+@@ -5,10 +5,7 @@ CONFIG_ENV_SIZE=0x2000
+ CONFIG_DM_GPIO=y
+ CONFIG_MESON_GXL=y
+ CONFIG_NR_DRAM_BANKS=1
+-CONFIG_DEBUG_UART_BASE=0xc81004c0
+-CONFIG_DEBUG_UART_CLOCK=24000000
+-CONFIG_IDENT_STRING=" libretech-cc"
+-CONFIG_DEBUG_UART=y
++CONFIG_IDENT_STRING=" armbian-gxl"
+ CONFIG_OF_BOARD_SETUP=y
+ CONFIG_MISC_INIT_R=y
+ # CONFIG_DISPLAY_CPUINFO is not set
+@@ -42,9 +39,10 @@ CONFIG_POWER_DOMAIN=y
+ CONFIG_MESON_GX_VPU_POWER_DOMAIN=y
+ CONFIG_DM_REGULATOR_FIXED=y
+ CONFIG_DM_RESET=y
+-CONFIG_DEBUG_UART_ANNOUNCE=y
+-CONFIG_DEBUG_UART_SKIP_INIT=y
+-CONFIG_MESON_SERIAL=y
++# CONFIG_DEBUG_UART is not set
++# CONFIG_REQUIRE_SERIAL_CONSOLE is not set
++# CONFIG_SERIAL_PRESENT is not set
++CONFIG_CONSOLE_MUX=y
+ CONFIG_USB=y
+ CONFIG_DM_USB=y
+ CONFIG_USB_XHCI_HCD=y
+@@ -64,3 +62,8 @@ CONFIG_SYS_WHITE_ON_BLACK=y
+ CONFIG_VIDEO_MESON=y
+ CONFIG_VIDEO_DT_SIMPLEFB=y
+ CONFIG_OF_LIBFDT_OVERLAY=y
++CONFIG_DISPLAY_BOARDINFO_LATE=y
++CONFIG_DM_KEYBOARD=y
++CONFIG_USB_KEYBOARD=y
++CONFIG_BOOTDELAY=5
++CONFIG_USE_PREBOOT=y
+diff --git a/include/configs/meson64.h b/include/configs/meson64.h
+index 50707a3197..cb77091a0a 100644
+--- a/include/configs/meson64.h
++++ b/include/configs/meson64.h
+@@ -76,6 +76,9 @@
+ #endif
+ 
+ #ifndef CONFIG_EXTRA_ENV_SETTINGS
++/* the usb start below makes sure a usb keyboard is available when the autoboot prompt starts
++ * the stdin line is to disable the serial console as it might produce noise on the cmdline
++ * otherwise in some situations so that the system will hang in u-boot cmdline at boot */
+ #define CONFIG_EXTRA_ENV_SETTINGS \
+ 	"stdin=" STDIN_CFG "\0" \
+ 	"stdout=" STDOUT_CFG "\0" \
+@@ -86,6 +89,17 @@
+ 	"pxefile_addr_r=0x01080000\0" \
+ 	"ramdisk_addr_r=0x13000000\0" \
+ 	"fdtfile=amlogic/" CONFIG_DEFAULT_DEVICE_TREE ".dtb\0" \
++	"bootenv_addr_r=0x01080000\0" \
++	"preboot=usb start; " \
++		"setenv stdin usbkbd; " \
++		"for target in 0 1;do " \
++		"for prefix in / /boot/;do " \
++			"if test -e mmc ${target}:1 ${prefix}uEnv.txt;then " \
++				"load mmc ${target}:1 ${bootenv_addr_r} ${prefix}uEnv.txt; " \
++				"env import -t ${bootenv_addr_r} ${filesize}; " \
++			"fi; " \
++		"done; " \
++	"done\0" \
+ 	BOOTENV
+ #endif
+ 

packages/bsp/aml-s9xx-box/boot/u-boot-readme.txt

@@ -1,10 +0,0 @@
-The u-boot binary files included in this directory are the ones originally built
-by balbes150 as part of his former TV Box builds.
-
-These should be recreated from scratch and either built automatically as part
-of the Armbian build process, or at least there should be instructions provided
-here as to how to rebuild them from source.
-
-I don't like releasing binary blobs of unknown origin, but as these are what
-people have been using for Amlogic TV Boxes for a couple of years this is 
-the status quo until something better is completed.