From: Thierry Reding <treding@xxxxxxxxxx>
If the sink is eDP and supports the alternate scrambler reset, enable
it.
Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
---
drivers/gpu/drm/drm_dp_helper.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index 828dc091b015..c8b18c0161d7 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -546,6 +546,13 @@ 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);
--
2.15.1
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