Reviewed-by: Lyude Paul <lyude@xxxxxxxxxx>
On Tue, 2019-10-15 at 16:34 +0200, Thierry Reding wrote:
> 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
> */
--
Cheers,
Lyude Paul
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