From: Guillaume La Roque glaroque@baylibre.com
Since Android 10, we are required to use a "dtbo" partition which includes the various device-tree overlays [1]. It's also possible to provide a "dtb" partition.
This is supported via the "abootimg" command.
On Yukawa, the assumption is that we have only a "dtbo" partition, which includes all board dtbs and their dtbos [2]
[1] https://source.android.com/devices/architecture/dto/partitions [2] https://android.googlesource.com/device/amlogic/yukawa/+/refs/heads/master/b... Signed-off-by: Guillaume La Roque glaroque@baylibre.com Signed-off-by: Mattijs Korpershoek mkorpershoek@baylibre.com --- include/configs/meson64_android.h | 57 ++++++++++++++++++++++++++++++- 1 file changed, 56 insertions(+), 1 deletion(-)
diff --git a/include/configs/meson64_android.h b/include/configs/meson64_android.h index 0ce616c17e..358e0a5c71 100644 --- a/include/configs/meson64_android.h +++ b/include/configs/meson64_android.h @@ -81,7 +81,59 @@ #define RECOVERY_PARTITION "recovery" #endif
+#if defined(CONFIG_CMD_ABOOTIMG) +/* + * Prepares complete device tree blob for current board (for Android boot). + * + * Boot image or recovery image should be loaded into $loadaddr prior to running + * these commands. The logic of these commnads is next: + * + * 1. Read correct DTB for current SoC/board from boot image in $loadaddr + * to $fdtaddr + * 2. Merge all needed DTBO for current board from 'dtbo' partition into read + * DTB + * 3. User should provide $fdtaddr as 3rd argument to 'bootm' + */ +#define PREPARE_FDT \ + "echo Preparing FDT...; " \ + "if test $board_name = sei510; then " \ + "echo " Reading DTB for sei510..."; " \ + "setenv dtb_index 0;" \ + "elif test $board_name = sei610; then " \ + "echo " Reading DTB for sei610..."; " \ + "setenv dtb_index 1;" \ + "else " \ + "echo Error: Android boot is not supported for $board_name; " \ + "exit; " \ + "fi; " \ + "abootimg get dtb --index=$dtb_index dtb_start dtb_size; " \ + "cp.b $dtb_start $fdt_addr_r $dtb_size; " \ + "fdt addr $fdt_addr_r 0x80000; " \ + "if test $board_name = sei510; then " \ + "echo " Reading DTBO for sei510..."; " \ + "setenv dtbo_index 0;" \ + "elif test $board_name = sei610; then " \ + "echo " Reading DTBO for sei610..."; " \ + "setenv dtbo_index 1;" \ + "else " \ + "echo Error: Android boot is not supported for $board_name; " \ + "exit; " \ + "fi; " \ + "part start mmc ${mmcdev} dtbo${slot_suffix} p_dtbo_start; " \ + "part size mmc ${mmcdev} dtbo${slot_suffix} p_dtbo_size; " \ + "mmc read ${dtboaddr} ${p_dtbo_start} ${p_dtbo_size}; " \ + "echo " Applying DTBOs..."; " \ + "adtimg addr $dtboaddr; " \ + "adtimg get dt --index=$dtbo_index dtbo0_addr; " \ + "fdt apply $dtbo0_addr;" \ + "setenv bootargs "$bootargs androidboot.dtbo_idx=$dtbo_index ";"\ + +#define BOOT_CMD "bootm ${loadaddr} ${loadaddr} ${fdt_addr_r};" + +#else +#define PREPARE_FDT " " #define BOOT_CMD "bootm ${loadaddr};" +#endif
#define BOOTENV_DEV_FASTBOOT(devtypeu, devtypel, instance) \ "bootcmd_fastboot=" \ @@ -153,6 +205,7 @@ "part start mmc ${mmcdev} " RECOVERY_PARTITION "${slot_suffix} boot_start;" \ "part size mmc ${mmcdev} " RECOVERY_PARTITION "${slot_suffix} boot_size;" \ "if mmc read ${loadaddr} ${boot_start} ${boot_size}; then " \ + PREPARE_FDT \ "echo Running Android Recovery...;" \ BOOT_CMD \ "fi;" \ @@ -174,6 +227,7 @@ "part start mmc ${mmcdev} " BOOT_PARTITION "${slot_suffix} boot_start;" \ "part size mmc ${mmcdev} " BOOT_PARTITION "${slot_suffix} boot_size;" \ "if mmc read ${loadaddr} ${boot_start} ${boot_size}; then " \ + PREPARE_FDT \ "setenv bootargs "${bootargs} " AB_BOOTARGS "" ; " \ "echo Running Android...;" \ BOOT_CMD \ @@ -212,7 +266,8 @@ "stdin=" STDIN_CFG "\0" \ "stdout=" STDOUT_CFG "\0" \ "stderr=" STDOUT_CFG "\0" \ - "loadaddr=0x01000000\0" \ + "dtboaddr=0x08200000\0" \ + "loadaddr=0x01080000\0" \ "fdt_addr_r=0x01000000\0" \ "scriptaddr=0x08000000\0" \ "kernel_addr_r=0x01080000\0" \