From decbc18ed2a9788fcaad3ca349def7bad36741f4 Mon Sep 17 00:00:00 2001
From: "Arnaud Patard (Rtp)" <arnaud.patard@rtp-net.org>
Date: Fri, 5 Mar 2021 11:27:49 +0100
Subject: [PATCH] Rockchip: video: vop: Reserve efi fb memory

When booting with EFI and graphics, the memory used for framebuffer
has to be reserved, otherwise it may leads to kernel memory
overwrite.

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Tested-by: Peter Robinson <pbrobinson@gmail.com>
---
 drivers/video/rockchip/rk_vop.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/video/rockchip/rk_vop.c b/drivers/video/rockchip/rk_vop.c
index 145a340..3eb5e8c 100644
--- a/drivers/video/rockchip/rk_vop.c
+++ b/drivers/video/rockchip/rk_vop.c
@@ -21,6 +21,8 @@
 #include <asm/arch-rockchip/vop_rk3288.h>
 #include <dm/device-internal.h>
 #include <dm/uclass-internal.h>
+#include <efi.h>
+#include <efi_loader.h>
 #include <linux/bitops.h>
 #include <linux/err.h>
 #include <power/regulator.h>
@@ -395,6 +397,11 @@ int rk_vop_probe(struct udevice *dev)
 	if (!(gd->flags & GD_FLG_RELOC))
 		return 0;
 
+#if defined(CONFIG_EFI_LOADER)
+	debug("Adding to EFI map %d @ %lx\n", plat->size, plat->base);
+	efi_add_memory_map(plat->base, plat->size, EFI_RESERVED_MEMORY_TYPE);
+#endif
+
 	priv->regs = (struct rk3288_vop *)dev_read_addr(dev);
 
 	/*
-- 
2.7.4