drm/nouveau/disp: add method to trigger DP link retrain

[linux-2.6-microblaze.git] / drivers / gpu / drm / nouveau / nouveau_dp.c

diff --git a/drivers/gpu/drm/nouveau/nouveau_dp.c b/drivers/gpu/drm/nouveau/nouveau_dp.c
index d349dc2..bde58d0 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_dp.c
+++ b/drivers/gpu/drm/nouveau/nouveau_dp.c
@@ -211,6 +211,17 @@ out:
        return ret;
 }
 
+bool
+nouveau_dp_link_check(struct nouveau_connector *nv_connector)
+{
+       struct nouveau_encoder *nv_encoder = find_encoder(&nv_connector->base, DCB_OUTPUT_DP);
+
+       if (!nv_encoder || nv_encoder->outp.or.id < 0)
+               return true;
+
+       return nvif_outp_dp_retrain(&nv_encoder->outp) == 0;
+}
+
 void nouveau_dp_irq(struct nouveau_drm *drm,
                    struct nouveau_connector *nv_connector)
 {