From: Thierry Reding <treding@xxxxxxxxxx>
Parse from the sink capabilities whether or not it supports ANSI 8B/10B
channel coding as specified in ANSI X3.230-1994, clause 11.
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 e22ebab677b9..0bd87cff4575 100644
--- a/drivers/gpu/drm/tegra/dp.c
+++ b/drivers/gpu/drm/tegra/dp.c
@@ -13,6 +13,7 @@ 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;
+ caps->channel_coding = false;
}
void drm_dp_link_caps_copy(struct drm_dp_link_caps *dest,
@@ -21,6 +22,7 @@ void drm_dp_link_caps_copy(struct drm_dp_link_caps *dest,
dest->enhanced_framing = src->enhanced_framing;
dest->tps3_supported = src->tps3_supported;
dest->fast_training = src->fast_training;
+ dest->channel_coding = src->channel_coding;
}
static void drm_dp_link_reset(struct drm_dp_link *link)
@@ -67,6 +69,7 @@ int drm_dp_link_probe(struct drm_dp_aux *aux, struct drm_dp_link *link)
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->caps.channel_coding = drm_dp_channel_coding_supported(dpcd);
link->rate = link->max_rate;
link->lanes = link->max_lanes;
diff --git a/drivers/gpu/drm/tegra/dp.h b/drivers/gpu/drm/tegra/dp.h
index 999078812943..984dac21568e 100644
--- a/drivers/gpu/drm/tegra/dp.h
+++ b/drivers/gpu/drm/tegra/dp.h
@@ -35,6 +35,13 @@ struct drm_dp_link_caps {
* AUX CH handshake not required for link training
*/
bool fast_training;
+
+ /**
+ * @channel_coding:
+ *
+ * ANSI 8B/10B channel coding capability
+ */
+ bool channel_coding;
};
void drm_dp_link_caps_copy(struct drm_dp_link_caps *dest,
--
2.23.0
