drm/nv50: set DP display power state during DPMS

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 16 insertions, 2 deletions

diff --git a/drivers/gpu/drm/nouveau/nv50_sor.c b/drivers/gpu/drm/nouveau/nv50_sor.c
index 45a617df6e39..bcd4cf84a7e6 100644
--- a/drivers/gpu/drm/nouveau/nv50_sor.c
+++ b/drivers/gpu/drm/nouveau/nv50_sor.c
@@ -115,8 +115,22 @@ nv50_sor_dpms(struct drm_encoder *encoder, int mode)
                          nv_rd32(dev, NV50_PDISPLAY_SOR_DPMS_STATE(or)));
         }
 
-        if (nv_encoder->dcb->type == OUTPUT_DP && mode == DRM_MODE_DPMS_ON)
-                nouveau_dp_link_train(encoder);
+        if (nv_encoder->dcb->type == OUTPUT_DP) {
+                struct nouveau_i2c_chan *auxch;
+
+                auxch = nouveau_i2c_find(dev, nv_encoder->dcb->i2c_index);
+                if (!auxch)
+                        return;
+
+                if (mode == DRM_MODE_DPMS_ON) {
+                        u8 status = DP_SET_POWER_D0;
+                        nouveau_dp_auxch(auxch, 8, DP_SET_POWER, &status, 1);
+                        nouveau_dp_link_train(encoder);
+                } else {
+                        u8 status = DP_SET_POWER_D3;
+                        nouveau_dp_auxch(auxch, 8, DP_SET_POWER, &status, 1);
+                }
+        }
 }
 
 static void