From: Thierry Reding treding@nvidia.com
The capability to train the link without the AUX CH handshake was introduced in DisplayPort 1.1, so it must be guarded accordingly.
Signed-off-by: Thierry Reding treding@nvidia.com --- drivers/gpu/drm/drm_dp_helper.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index dcfd6898aebe..1fe181525604 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -316,8 +316,9 @@ int drm_dp_link_probe(struct drm_dp_aux *aux, struct drm_dp_link *link) if (values[2] & DP_TPS3_SUPPORTED) link->capabilities |= DP_LINK_CAP_TPS3;
- if (values[3] & DP_NO_AUX_HANDSHAKE_LINK_TRAINING) - link->capabilities |= DP_LINK_CAP_FAST_TRAINING; + if (link->revision >= 0x11) + if (values[3] & DP_NO_AUX_HANDSHAKE_LINK_TRAINING) + link->capabilities |= DP_LINK_CAP_FAST_TRAINING;
if (values[6] & DP_SET_ANSI_8B10B) link->capabilities |= DP_LINK_CAP_ANSI_8B10B;