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hwinit: add seamless display (L4T Linux/Android)

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Initial support is for coreboot based preloading.
This commit is contained in:
CTCaer
2021-04-11 09:18:55 +03:00
parent 345d36287e
commit 28008ac7ac
3 changed files with 26 additions and 5 deletions
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8
bootloader/main.c
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@@ -143,6 +143,7 @@ void check_power_off_from_hos()
#define EXT_PAYLOAD_ADDR 0xC0000000
#define RCM_PAYLOAD_ADDR (EXT_PAYLOAD_ADDR + ALIGN(PATCHED_RELOC_SZ, 0x10))
#define COREBOOT_END_ADDR 0xD0000000
#define COREBOOT_VER_OFF 0x41
#define CBFS_DRAM_EN_ADDR 0x4003e000
#define CBFS_DRAM_MAGIC 0x4452414D // "DRAM"
@@ -268,7 +269,12 @@ int launch_payload(char *path, bool update)
else
{
reloc_patcher(PATCHED_RELOC_ENTRY, EXT_PAYLOAD_ADDR, 0x7000);
hw_reinit_workaround(true, 0);
// Get coreboot seamless display magic.
u32 magic = 0;
char *magic_ptr = buf + COREBOOT_VER_OFF;
memcpy(&magic, magic_ptr + strlen(magic_ptr) - 4, 4);
hw_reinit_workaround(true, magic);
}
// Some cards (Sandisk U1), do not like a fast power cycle. Wait min 100ms.