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authorThierry Reding <treding@nvidia.com>2019-10-21 16:34:29 +0200
committerThierry Reding <treding@nvidia.com>2019-10-23 18:18:47 +0200
commit7624629d06b01d115e9a83c372f26ffd181c6aa5 (patch)
tree9517669d71c1dcd2338e7654d2de9e833b1aa25f /include/drm
parent99c830b8b7bef939dfcd385553b39a5d5b278a03 (diff)
drm/dp: Add drm_dp_alternate_scrambler_reset_cap() helper
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> Link: https://patchwork.freedesktop.org/patch/msgid/20191021143437.1477719-6-thierry.reding@gmail.com
Diffstat (limited to 'include/drm')
-rw-r--r--include/drm/drm_dp_helper.h7
1 files changed, 7 insertions, 0 deletions
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
*/