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drm/nouveau/dp: fix bad comparison in dp_link_train_commit() 

The comparison (lpre == DP_TRAIN_PRE_EMPHASIS_9_5) is always false:
lpre is initialized as (lane & 0x0c) >> 2, which is at most 3, while
DP_TRAIN_PRE_EMPHASIS_9_5 is defined as (3 << 3).

Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Xi Wang 2012-02-03 11:13:55 -05:00 committed by Ben Skeggs
parent 84ddfda6d4
commit 44ab8cc56c
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/nouveau/nouveau_dp.c
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@ -432,7 +432,7 @@ dp_link_train_commit(struct drm_device *dev, struct dp_state *dp)
dp->conf[i] = (lpre << 3) | lvsw;
if (lvsw == DP_TRAIN_VOLTAGE_SWING_1200)
dp->conf[i] |= DP_TRAIN_MAX_SWING_REACHED;
if (lpre == DP_TRAIN_PRE_EMPHASIS_9_5)
if ((lpre << 3) == DP_TRAIN_PRE_EMPHASIS_9_5)
dp->conf[i] |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
NV_DEBUG_KMS(dev, "config lane %d %02x\n", i, dp->conf[i]);