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/drm_dp_helper.c | 3 +++
include/drm/drm_dp_helper.h | 1 +
2 files changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index 0211502f63af..2c774ffa2943 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -303,6 +303,7 @@ EXPORT_SYMBOL(drm_dp_dpcd_read_link_status);
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;
}
@@ -310,6 +311,7 @@ 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;
}
@@ -355,6 +357,7 @@ int drm_dp_link_probe(struct drm_dp_aux *aux, struct drm_dp_link *link)
link->max_lanes = drm_dp_max_lane_count(values);
link->caps.enhanced_framing = drm_dp_enhanced_frame_cap(values);
+ link->caps.tps3_supported = drm_dp_tps3_supported(values);
link->caps.fast_training = drm_dp_fast_training_cap(values);
link->rate = link->max_rate;
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index a01ae89cee9c..bf280a4230fa 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -764,6 +764,7 @@ int drm_dp_dpcd_read_link_status(struct drm_dp_aux *aux,
*/
struct drm_dp_link_caps {
bool enhanced_framing;
+ bool tps3_supported;
bool fast_training;
};
--
2.5.0
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