From: Ben Skeggs Date: Thu, 31 Oct 2013 23:36:42 +0000 (+1000) Subject: drm/nouveau/disp: log if DP link training fails X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=687d8f66b1849a1da515bcbc791f84d7d6dcfa1c;p=linux-beck.git drm/nouveau/disp: log if DP link training fails Signed-off-by: Ben Skeggs --- diff --git a/drivers/gpu/drm/nouveau/core/engine/disp/dport.c b/drivers/gpu/drm/nouveau/core/engine/disp/dport.c index 054d9cff4f53..15448b9abac8 100644 --- a/drivers/gpu/drm/nouveau/core/engine/disp/dport.c +++ b/drivers/gpu/drm/nouveau/core/engine/disp/dport.c @@ -308,7 +308,7 @@ nouveau_dp_train(struct nouveau_disp *disp, const struct nouveau_dp_func *func, while (*link_bw > (dp->dpcd[1] * 27000)) link_bw++; - while (link_bw[0]) { + while ((ret = -EIO) && link_bw[0]) { /* find minimum required lane count at this link rate */ dp->link_nr = dp->dpcd[2] & DPCD_RC02_MAX_LANE_COUNT; while ((dp->link_nr >> 1) * link_bw[0] > datarate) @@ -339,6 +339,8 @@ nouveau_dp_train(struct nouveau_disp *disp, const struct nouveau_dp_func *func, /* finish link training */ dp_set_training_pattern(dp, 0); + if (ret < 0) + ERR("link training failed\n"); /* execute post-train script from vbios */ dp_link_train_fini(dp);