@Jani N, could you give an ACK on this if this looks okay, addressed
your review comments regarding the name of the function.
Else I have a r-b functionality wise so good to get merged?
Regards
Manasi
On Fri, Jun 12, 2020 at 04:04:42PM -0700, Manasi Navare wrote:
> DP sink device sets the Ignore MSA bit in its
> DP_DOWNSTREAM_PORT_COUNT register to indicate its ability to
> ignore the MSA video timing parameters and its ability to support
> seamless video timing change over a range of timing exposed by
> DisplayID and EDID.
> This is required for the sink to indicate that it is Adaptive sync
> capable.
>
> v3:
> * Fi the typo in commit message (Manasi)
> v2:
> * Rename to describe what the function does (Jani Nikula)
>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
> Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> Cc: Harry Wentland <harry.wentland@xxxxxxx>
> Cc: Nicholas Kazlauskas <Nicholas.Kazlauskas@xxxxxxx>
> Signed-off-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
> Reviewed-by: Harry Wentland <harry.wentland@xxxxxxx>
> ---
> include/drm/drm_dp_helper.h | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
> index 1165ec105638..e47dc22ebf50 100644
> --- a/include/drm/drm_dp_helper.h
> +++ b/include/drm/drm_dp_helper.h
> @@ -1457,6 +1457,14 @@ drm_dp_alternate_scrambler_reset_cap(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
> DP_ALTERNATE_SCRAMBLER_RESET_CAP;
> }
>
> +/* Ignore MSA timing for Adaptive Sync support on DP 1.4 */
> +static inline bool
> +drm_dp_sink_can_do_video_without_timing_msa(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
> +{
> + return dpcd[DP_DOWN_STREAM_PORT_COUNT] &
> + DP_MSA_TIMING_PAR_IGNORED;
> +}
> +
> /*
> * DisplayPort AUX channel
> */
> --
> 2.19.1
>
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