[PATCHv2 11/22] drm/bridge: tc358767: ensure DP is disabled before LT

[Tomi Valkeinen]

Link training will sometimes fail if the DP link is, for some whatever
reason, enabled when tc_main_link_enable() is called.

Ensure that the DP link is disabled by setting DP0CTL to 0 as the first
thing.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen at ti.com>
---
 drivers/gpu/drm/bridge/tc358767.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index fe5fd7db0247..f628575c9de9 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -839,6 +839,8 @@ static int tc_main_link_enable(struct tc_data *tc)
 
 	dev_dbg(tc->dev, "link enable\n");
 
+	tc_write(DP0CTL, 0);
+
 	tc_write(DP0_SRCCTRL, tc_srcctrl(tc));
 	/* SSCG and BW27 on DP1 must be set to the same as on DP0 */
 	tc_write(DP1_SRCCTRL,
-- 
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