diff options
| author | Thierry Reding <treding@nvidia.com> | 2019-10-21 17:34:29 +0300 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2019-10-23 19:18:47 +0300 |
| commit | 7624629d06b01d115e9a83c372f26ffd181c6aa5 (patch) | |
| tree | 9517669d71c1dcd2338e7654d2de9e833b1aa25f /include/drm/drm_dp_helper.h | |
| parent | 99c830b8b7bef939dfcd385553b39a5d5b278a03 (diff) | |
| download | linux-7624629d06b01d115e9a83c372f26ffd181c6aa5.tar.xz | |
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/drm_dp_helper.h')
| -rw-r--r-- | include/drm/drm_dp_helper.h | 7 |
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 */ |