board: rpi4: Enable splashscreen

Author: mattiaswal

src/board/raspberry-pi-4/uboot/extras.config

@@ -1,3 +1,12 @@
 # CONFIG_MMC_PCI is not set
 CONFIG_OF_OVERLAY_LIST="rpi-env infix-key"
 # CONFIG_ENV_IS_IN_FAT is not set
+CONFIG_CMD_BMP=y
+CONFIG_SPLASH_SCREEN=y
+CONFIG_SPLASH_SCREEN_ALIGN=y
+CONFIG_BMP=y
+CONFIG_BMP_24BPP=y
+#CONFIG_VIDEO_BMP_GZIP=y
+CONFIG_VIDEO=y
+CONFIG_VIDEO_BMP_RLE8=y
+#CONFIG_SILENT_CONSOLE=y

src/board/raspberry-pi-4/uboot/rpi-env.dtso

@@ -12,6 +12,13 @@
 			boot_targets = "mmc0";
 			ethprime = "eth0";
 			bootcmd = "run ixboot";
+/*
+			bootcmd = "fatload mmc 0:1 ${splashimage} ${splashfile}; bmp display ${splashimage}; run ixboot";
+			splashimage =" 0x10000000";
+			splashpos = "m,m";
+			silent = "1";
+*/
+			splashfile = "splash.bmp";
 
 			ixpreboot     = /incbin/("scripts/ixpreboot.sh");
 			ixbtn-devmode = "setenv dev_mode yes; echo Enabled";