diff --git a/drivers/gpu/drm/nouveau/nv50_display.c b/drivers/gpu/drm/nouveau/nv50_display.c
index ebf0a68..fbfca21 100644
--- a/drivers/gpu/drm/nouveau/nv50_display.c
+++ b/drivers/gpu/drm/nouveau/nv50_display.c
@@ -1556,6 +1556,8 @@ nv50_dac_detect(struct drm_encoder *encoder, struct drm_connector *connector)
 	int ret, or = nouveau_encoder(encoder)->or;
 	u32 load = 0;
 
+	nv_wr32(nouveau_dev(encoder->dev), NV50_PDISPLAY_DAC_CLK_CTRL1(or), 0x00000001);
+
 	ret = nv_exec(disp->core, NV50_DISP_DAC_LOAD + or, &load, sizeof(load));
 	if (ret || load != 7)
 		return connector_status_disconnected;