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drm/nouveau/disp: log if DP link training fails

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Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2013-11-01 09:36:42 +10:00
parent 9e2b734f1c
commit 687d8f66b1
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/nouveau/core/engine/disp/dport.c
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@ -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);