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 --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);