From: Thierry Reding <treding@xxxxxxxxxx>
The TPS3 capability can be exposed by DP 1.2 and later sinks if they
support the alternative training pattern for channel equalization.
Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
---
drivers/gpu/drm/tegra/dp.c | 3 +++
drivers/gpu/drm/tegra/dp.h | 7 +++++++
2 files changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/tegra/dp.c b/drivers/gpu/drm/tegra/dp.c
index 97fc0225483f..e22ebab677b9 100644
--- a/drivers/gpu/drm/tegra/dp.c
+++ b/drivers/gpu/drm/tegra/dp.c
@@ -11,6 +11,7 @@
static void drm_dp_link_caps_reset(struct drm_dp_link_caps *caps)
{
caps->enhanced_framing = false;
+ caps->tps3_supported = false;
caps->fast_training = false;
}
@@ -18,6 +19,7 @@ void drm_dp_link_caps_copy(struct drm_dp_link_caps *dest,
const struct drm_dp_link_caps *src)
{
dest->enhanced_framing = src->enhanced_framing;
+ dest->tps3_supported = src->tps3_supported;
dest->fast_training = src->fast_training;
}
@@ -63,6 +65,7 @@ int drm_dp_link_probe(struct drm_dp_aux *aux, struct drm_dp_link *link)
link->max_lanes = drm_dp_max_lane_count(dpcd);
link->caps.enhanced_framing = drm_dp_enhanced_frame_cap(dpcd);
+ link->caps.tps3_supported = drm_dp_tps3_supported(dpcd);
link->caps.fast_training = drm_dp_fast_training_cap(dpcd);
link->rate = link->max_rate;
diff --git a/drivers/gpu/drm/tegra/dp.h b/drivers/gpu/drm/tegra/dp.h
index d6ae477bab5c..999078812943 100644
--- a/drivers/gpu/drm/tegra/dp.h
+++ b/drivers/gpu/drm/tegra/dp.h
@@ -22,6 +22,13 @@ struct drm_dp_link_caps {
*/
bool enhanced_framing;
+ /**
+ * tps3_supported:
+ *
+ * training pattern sequence 3 supported for equalization
+ */
+ bool tps3_supported;
+
/**
* @fast_training:
*
--
2.23.0
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