From: Thierry Reding treding@nvidia.com
Add a helper to check if the sink supports the eDP alternate scrambler reset value of 0xfffe.
Reviewed-by: Lyude Paul lyude@redhat.com Signed-off-by: Thierry Reding treding@nvidia.com --- include/drm/drm_dp_helper.h | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index bc276c80b927..b3402cb186a4 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -1294,6 +1294,13 @@ drm_dp_channel_coding_supported(const u8 dpcd[DP_RECEIVER_CAP_SIZE]) return dpcd[DP_MAIN_LINK_CHANNEL_CODING] & DP_CAP_ANSI_8B10B; }
+static inline bool +drm_dp_alternate_scrambler_reset_cap(const u8 dpcd[DP_RECEIVER_CAP_SIZE]) +{ + return dpcd[DP_EDP_CONFIGURATION_CAP] & + DP_ALTERNATE_SCRAMBLER_RESET_CAP; +} + /* * DisplayPort AUX channel */