linux-imx

LF-323-2: drm/bridge/cdns: enhance link training stability

Remove drm_dp_link_power_down from bridge_disable function,
in case some DP sinks aren't follow DP 1.1 specification
and can not exit the power saving state within 1 ms.
Add drm_dp_link_power_up to bridge_enable function,
make sure DP sinks are power up before link training.

Signed-off-by: Sandor Yu <Sandor.yu@nxp.com>
Reviewed-by: Robby Cai <robby.cai@nxp.com>