From: Thierry Reding Date: Mon, 21 Oct 2019 14:34:29 +0000 (+0200) Subject: drm/dp: Add drm_dp_alternate_scrambler_reset_cap() helper X-Git-Tag: v5.5-rc1~128^2~24^2~8 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=7624629d06b01d115e9a83c372f26ffd181c6aa5;p=linux.git 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 Signed-off-by: Thierry Reding Link: https://patchwork.freedesktop.org/patch/msgid/20191021143437.1477719-6-thierry.reding@gmail.com --- 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 */