diff --git a/drivers/mxc/amd-gpu/include/gsl_halconfig.h b/drivers/mxc/amd-gpu/include/gsl_halconfig.h
index 32090f9432d..363474b7a6b 100755
--- a/drivers/mxc/amd-gpu/include/gsl_halconfig.h
+++ b/drivers/mxc/amd-gpu/include/gsl_halconfig.h
@@ -42,7 +42,7 @@
 #define GSL_HAL_SHMEM_SIZE_EMEM2_MMU    0x00400000            /* 4MB */
 #define GSL_HAL_SHMEM_SIZE_PHYS_MMU     0x00400000            /* 4MB */
 
-#define GSL_HAL_SHMEM_SIZE_EMEM1_NOMMU  0x00D00000            /* 13MB */
+#define GSL_HAL_SHMEM_SIZE_EMEM1_NOMMU  0x00A00000            /* 10MB */
 #define GSL_HAL_SHMEM_SIZE_EMEM2_NOMMU  0x00200000            /* 2MB */
 #define GSL_HAL_SHMEM_SIZE_PHYS_NOMMU   0x00100000            /* 1MB */
 
diff --git a/drivers/mxc/amd-gpu/platform/hal/linux/gsl_hal.c b/drivers/mxc/amd-gpu/platform/hal/linux/gsl_hal.c
index 43709c7bea0..8d452830cc0 100644
--- a/drivers/mxc/amd-gpu/platform/hal/linux/gsl_hal.c
+++ b/drivers/mxc/amd-gpu/platform/hal/linux/gsl_hal.c
@@ -120,11 +120,8 @@ kgsl_hal_init(void)
 	hal->has_z160 = 0;
     }
 
-    if (hal->has_z430) {
-	gsl_driver.enable_mmu = 0;
-    } else {
-	gsl_driver.enable_mmu = 1;
-    }
+    /* there is still some problem to enable mmu currently */
+    gsl_driver.enable_mmu = 0;
 
     /* setup register space */
     if (hal->has_z430) {