From: Thierry Reding <treding@xxxxxxxxxx>
Add a helper to check if the sink supports the eDP alternate scrambler
reset value of 0xfffe.
Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
---
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 7ff7bf0e742d..7a537ffc2fb1 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -1290,6 +1290,13 @@ 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
*/
--
2.23.0
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