diff --git a/drivers/gpu/drm/radeon/radeon_combios.c b/drivers/gpu/drm/radeon/radeon_combios.c
index 22d4761..a69f5c8 100644
--- a/drivers/gpu/drm/radeon/radeon_combios.c
+++ b/drivers/gpu/drm/radeon/radeon_combios.c
@@ -2793,11 +2793,18 @@ void radeon_combios_asic_init(struct drm_device *dev)
 {
 	struct radeon_device *rdev = dev->dev_private;
 	uint16_t table;
+	uint32_t save_config_cntl, tmp;
 
 	/* port hardcoded mac stuff from radeonfb */
 	if (rdev->bios == NULL)
 		return;
 
+	save_config_cntl = RREG32(RADEON_CONFIG_CNTL);
+	tmp = save_config_cntl;
+	tmp &= ~(1 << 9);
+	tmp |= (1 << 8);
+	WREG32(RADEON_CONFIG_CNTL, tmp);
+
 	/* ASIC INIT 1 */
 	table = combios_get_table_offset(dev, COMBIOS_ASIC_INIT_1_TABLE);
 	if (table)
@@ -2840,6 +2847,7 @@ void radeon_combios_asic_init(struct drm_device *dev)
 	if (table)
 		combios_parse_pll_table(dev, table);
 
+	WREG32(RADEON_CONFIG_CNTL, save_config_cntl);
 }
 
 void radeon_combios_initialize_bios_scratch_regs(struct drm_device *dev)