From 9d7731c347fce3c51f45800ebb1b263532e2f6ee Mon Sep 17 00:00:00 2001
From: Yifeng Zhao <yifeng.zhao@rock-chips.com>
Date: Fri, 22 Aug 2025 10:37:41 +0800
Subject: [PATCH] soc: rockchip: thunderboot_mmc: disable DMA upon transfer
 completion

Signed-off-by: Yifeng Zhao <yifeng.zhao@rock-chips.com>
Change-Id: I8f61eae3acdef85157452a29124e95e7fc4cf1fb
---
 drivers/soc/rockchip/rockchip_thunderboot_mmc.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/soc/rockchip/rockchip_thunderboot_mmc.c b/drivers/soc/rockchip/rockchip_thunderboot_mmc.c
index 4c73ae4613fe..3ca747066a6b 100644
--- a/drivers/soc/rockchip/rockchip_thunderboot_mmc.c
+++ b/drivers/soc/rockchip/rockchip_thunderboot_mmc.c
@@ -16,8 +16,11 @@
 #include <linux/soc/rockchip/rockchip_decompress.h>
 #include <linux/soc/rockchip/rockchip_thunderboot_crypto.h>
 
+#define SDMMC_CTRL		0x000
 #define SDMMC_RINTSTS		0x044
 #define SDMMC_STATUS		0x048
+#define SDMMC_BMOD		0x080
+#define SDMMC_DBADDR		0x088
 #define SDMMC_IDSTS		0x08c
 #define SDMMC_INTR_ERROR	0xB7C2
 
@@ -76,6 +79,11 @@ static int rk_tb_mmc_thread(void *p)
 		goto out;
 	}
 
+	/* Disable the DMA of the MMC controller */
+	writel(0, regs + SDMMC_CTRL);
+	writel(0, regs + SDMMC_BMOD);
+	writel(0, regs + SDMMC_DBADDR);
+
 	/* Parse ramdisk addr and help start decompressing */
 	if (rds && rdd) {
 		struct resource src, dst;