From: Thierry Reding <thierry.reding@gmail.com>
To: dri-devel@lists.freedesktop.org
Subject: [PATCH v3 04/13] drm/dp: Add drm_dp_channel_coding_supported() helper
Date: Mon, 21 Oct 2019 16:34:28 +0200 [thread overview]
Message-ID: <20191021143437.1477719-5-thierry.reding@gmail.com> (raw)
In-Reply-To: <20191021143437.1477719-1-thierry.reding@gmail.com>
From: Thierry Reding <treding@nvidia.com>
Add a helper to check whether the sink supports ANSI 8B/10B channel
coding capability as specified in ANSI X3.230-1994, clause 11.
Reviewed-by: Lyude Paul <lyude@redhat.com>
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 1179d3f2ba7c..bc276c80b927 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -137,6 +137,7 @@
# define DP_DETAILED_CAP_INFO_AVAILABLE (1 << 4) /* DPI */
#define DP_MAIN_LINK_CHANNEL_CODING 0x006
+# define DP_CAP_ANSI_8B10B (1 << 0)
#define DP_DOWN_STREAM_PORT_COUNT 0x007
# define DP_PORT_COUNT_MASK 0x0f
@@ -1287,6 +1288,12 @@ drm_dp_sink_supports_fec(const u8 fec_capable)
return fec_capable & DP_FEC_CAPABLE;
}
+static inline bool
+drm_dp_channel_coding_supported(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
+{
+ return dpcd[DP_MAIN_LINK_CHANNEL_CODING] & DP_CAP_ANSI_8B10B;
+}
+
/*
* DisplayPort AUX channel
*/
--
2.23.0
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next prev parent reply other threads:[~2019-10-21 14:34 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-21 14:34 [PATCH v3 00/13] drm/dp: Move drm_dp_link helpers to Tegra DRM Thierry Reding
2019-10-21 14:34 ` [PATCH v3 01/13] drm/dp: Sort includes alphabetically Thierry Reding
2019-10-21 14:34 ` [PATCH v3 02/13] drm/dp: Remove a gratuituous blank line Thierry Reding
2019-10-21 14:34 ` [PATCH v3 03/13] drm/dp: Add drm_dp_fast_training_cap() helper Thierry Reding
2019-10-21 14:34 ` Thierry Reding [this message]
2019-10-21 14:34 ` [PATCH v3 05/13] drm/dp: Add drm_dp_alternate_scrambler_reset_cap() helper Thierry Reding
2019-10-21 14:34 ` [PATCH v3 06/13] drm/dp: Do not busy-loop during link training Thierry Reding
2019-10-22 14:04 ` Daniel Vetter
2019-10-21 14:34 ` [PATCH v3 07/13] drm/dp: Add helper to get post-cursor adjustments Thierry Reding
2019-10-21 14:34 ` [PATCH v3 08/13] drm/bridge: analogix-anx78xx: Avoid drm_dp_link helpers Thierry Reding
2019-10-22 13:29 ` Daniel Vetter
2019-10-22 14:52 ` [PATCH v4] " Thierry Reding
2019-10-23 9:13 ` Daniel Vetter
2019-10-21 14:34 ` [PATCH v3 09/13] drm/bridge: tc358767: " Thierry Reding
2019-10-22 13:38 ` Daniel Vetter
2019-10-21 14:34 ` [PATCH v3 10/13] drm/bridge: tc358767: Use DP nomenclature Thierry Reding
2019-10-21 14:34 ` [PATCH v3 11/13] drm/msm: edp: Avoid drm_dp_link helpers Thierry Reding
2019-10-22 13:53 ` Daniel Vetter
2019-10-21 14:34 ` [PATCH v3 12/13] drm/rockchip: " Thierry Reding
2019-10-22 14:01 ` Daniel Vetter
2019-10-21 14:34 ` [PATCH v3 13/13] drm/tegra: Move drm_dp_link helpers to Tegra DRM Thierry Reding
2019-10-22 14:03 ` Daniel Vetter
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