diff mbox series

[05/15] drm/dp: Add drm_dp_alternate_scrambler_reset_cap() helper

Message ID 20191015143509.1104985-6-thierry.reding@gmail.com (mailing list archive)
State New, archived
Headers show
Series drm/dp: Move drm_dp_link helpers to Tegra DRM | expand

Commit Message

Thierry Reding Oct. 15, 2019, 2:34 p.m. UTC 
From: Thierry Reding <treding@nvidia.com>

Add a helper to check if the sink supports the eDP alternate scrambler
reset value of 0xfffe.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 include/drm/drm_dp_helper.h | 7 +++++++
 1 file changed, 7 insertions(+)

Comments

Lyude Paul Oct. 18, 2019, 9:23 p.m. UTC | #1 
Reviewed-by: Lyude Paul <lyude@redhat.com>

On Tue, 2019-10-15 at 16:34 +0200, Thierry Reding wrote:
> From: Thierry Reding <treding@nvidia.com>
> 
> Add a helper to check if the sink supports the eDP alternate scrambler
> reset value of 0xfffe.
> 
> Signed-off-by: Thierry Reding <treding@nvidia.com>
> ---
>  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
>   */
diff mbox series

Patch

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
  */