From b33b4d6a737de7940b7d174bbe01f86e35b574c0 Mon Sep 17 00:00:00 2001
From: Sandy Huang <hjc@rock-chips.com>
Date: Mon, 2 Aug 2021 15:14:09 +0800
Subject: [PATCH] drm/rockchip: support using reserved memory region for cma

Change-Id: I829162c21748052525b0583185db67015f24141d
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
Signed-off-by: Sandy Huang <hjc@rock-chips.com>
---
 drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
index 1fef242169da..ebcc5bd22629 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -18,6 +18,7 @@
 #include <linux/component.h>
 #include <linux/console.h>
 #include <linux/iommu.h>
+#include <linux/of_reserved_mem.h>
 
 #include <drm/drm_debugfs.h>
 #include <drm/drm_drv.h>
@@ -631,6 +632,9 @@ static int rockchip_drm_bind(struct device *dev)
 	drm_kms_helper_poll_init(drm_dev);
 
 	rockchip_gem_pool_init(drm_dev);
+	ret = of_reserved_mem_device_init(drm_dev->dev);
+	if (ret)
+		DRM_DEBUG_KMS("No reserved memory region assign to drm\n");
 
 	ret = drm_dev_register(drm_dev, 0);
 	if (ret)