diff --git a/arch/arm/configs/gem5_defconfig b/arch/arm/configs/gem5_defconfig
index faa1555..8b1d4d4 100644
--- a/arch/arm/configs/gem5_defconfig
+++ b/arch/arm/configs/gem5_defconfig
@@ -1999,6 +1999,8 @@
 CONFIG_DRM_FBDEV_EMULATION=y
 CONFIG_DRM_LOAD_EDID_FIRMWARE=y
 CONFIG_DRM_TTM=y
+CONFIG_DRM_GEM_CMA_HELPER=y
+CONFIG_DRM_KMS_CMA_HELPER=y
 
 #
 # I2C encoder or helper chips
@@ -2008,6 +2010,9 @@
 # CONFIG_DRM_I2C_SIL164 is not set
 # CONFIG_DRM_I2C_NXP_TDA998X is not set
 # CONFIG_DRM_TDFX is not set
+CONFIG_DRM_ARM=y
+CONFIG_DRM_HDLCD=y
+# CONFIG_DRM_HDLCD_SHOW_UNDERRUN is not set
 # CONFIG_DRM_R128 is not set
 # CONFIG_DRM_RADEON is not set
 # CONFIG_DRM_AMDGPU is not set
@@ -2016,6 +2021,7 @@
 # CONFIG_DRM_VIA is not set
 # CONFIG_DRM_SAVAGE is not set
 # CONFIG_DRM_VGEM is not set
+CONFIG_DRM_VIRT_ENCODER=y
 # CONFIG_DRM_EXYNOS is not set
 # CONFIG_DRM_AST is not set
 # CONFIG_DRM_MGAG200 is not set