Commit 0158a04d authored Apr 16, 2019 by Govinda Rajulu Chenna Committed by Gerrit - the friendly Code Review server Apr 22, 2019

drm/msm/dp: fix mode switch issue with fec on



Switching mode may trigger link-training as part of ctrl_on.
Driver needs to turn off fec on tx side before performing the
link-training if previous link configuration is enabled with
fec. Performing link-training without turning off fec causes
link training failures.

The change ensures to disable fec configuration before
performing the link-training.

CRs-Fixed: 2408160
Change-Id: I122d07a8e5bd70679430c3cfab2739b5f98af872
Signed-off-by: Govinda Rajulu Chenna <gchenna@codeaurora.org>

parent 5515f145

drivers/gpu/drm/msm/dp/dp_ctrl.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -177,6 +177,7 @@ static void dp_ctrl_configure_source_link_params(struct dp_ctrl_private *ctrl,
		ctrl->link->link_params.lane_count);
		ctrl->catalog->mainlink_levels(ctrl->catalog,
		ctrl->link->link_params.lane_count);
		ctrl->catalog->fec_config(ctrl->catalog, false);
		ctrl->catalog->mainlink_ctrl(ctrl->catalog, true);
		} else {
		ctrl->catalog->mainlink_ctrl(ctrl->catalog, false);