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platform_kernel-5.15
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drm/nouveau/dp: account for channel coding overhead in link training 

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2012-03-12 11:16:55 +10:00
parent c674844bab
commit 6860dc8251
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/nouveau/nouveau_dp.c
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@ -422,6 +422,9 @@ nouveau_dp_link_train(struct drm_encoder *encoder, u32 datarate,
dp.auxch = auxch->drive;
dp.dpcd = nv_encoder->dp.dpcd;
/* adjust required bandwidth for 8B/10B coding overhead */
datarate = (datarate / 8) * 10;
/* some sinks toggle hotplug in response to some of the actions
* we take during link training (DP_SET_POWER is one), we need
* to ignore them for the moment to avoid races.