diff mbox series

[v2,17/21] drm/dp: Enable alternate scrambler reset when supported

Message ID 20190902113121.31323-18-thierry.reding@gmail.com (mailing list archive)
State New, archived
Headers show
Series drm/dp: Various helper improvements and cleanups | expand

Commit Message

Thierry Reding Sept. 2, 2019, 11:31 a.m. UTC 
From: Thierry Reding <treding@nvidia.com>

If the sink is eDP and supports the alternate scrambler reset, enable
it.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 drivers/gpu/drm/drm_dp_helper.c | 7 +++++++
 1 file changed, 7 insertions(+)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index f51a5595ebc0..85956f3a24e3 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -539,6 +539,13 @@  int drm_dp_link_configure(struct drm_dp_aux *aux, struct drm_dp_link *link)
 	if (err < 0)
 		return err;
 
+	if (link->caps.alternate_scrambler_reset) {
+		err = drm_dp_dpcd_writeb(aux, DP_EDP_CONFIGURATION_SET,
+					 DP_ALTERNATE_SCRAMBLER_RESET_ENABLE);
+		if (err < 0)
+			return err;
+	}
+
 	return 0;
 }
 EXPORT_SYMBOL(drm_dp_link_configure);