1 files changed, 58 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.h b/drivers/gpu/drm/i915/display/intel_dp_link_training.h
new file mode 100644
index 000000000000..1ba22ed6db08
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.h
@@ -0,0 +1,58 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_DP_LINK_TRAINING_H__
+#define __INTEL_DP_LINK_TRAINING_H__
+
+#include <drm/display/drm_dp_helper.h>
+
+struct intel_atomic_state;
+struct intel_connector;
+struct intel_crtc_state;
+struct intel_dp;
+
+int intel_dp_read_dprx_caps(struct intel_dp *intel_dp, u8 dpcd[DP_RECEIVER_CAP_SIZE]);
+int intel_dp_init_lttpr_and_dprx_caps(struct intel_dp *intel_dp);
+bool intel_dp_lttpr_transparent_mode_enabled(struct intel_dp *intel_dp);
+
+void intel_dp_link_training_set_mode(struct intel_dp *intel_dp,
+				     int link_rate, bool is_vrr);
+void intel_dp_link_training_set_bw(struct intel_dp *intel_dp,
+				   int link_bw, int rate_select, int lane_count,
+				   bool enhanced_framing);
+
+bool intel_dp_get_adjust_train(struct intel_dp *intel_dp,
+			       const struct intel_crtc_state *crtc_state,
+			       enum drm_dp_phy dp_phy,
+			       const u8 link_status[DP_LINK_STATUS_SIZE]);
+void intel_dp_program_link_training_pattern(struct intel_dp *intel_dp,
+					    const struct intel_crtc_state *crtc_state,
+					    enum drm_dp_phy dp_phy,
+					    u8 dp_train_pat);
+void intel_dp_set_signal_levels(struct intel_dp *intel_dp,
+				const struct intel_crtc_state *crtc_state,
+				enum drm_dp_phy dp_phy);
+void intel_dp_start_link_train(struct intel_atomic_state *state,
+			       struct intel_dp *intel_dp,
+			       const struct intel_crtc_state *crtc_state);
+void intel_dp_stop_link_train(struct intel_dp *intel_dp,
+			      const struct intel_crtc_state *crtc_state);
+
+void
+intel_dp_dump_link_status(struct intel_dp *intel_dp, enum drm_dp_phy dp_phy,
+			  const u8 link_status[DP_LINK_STATUS_SIZE]);
+
+/* Get the TPSx symbol type of the value programmed to DP_TRAINING_PATTERN_SET */
+static inline u8 intel_dp_training_pattern_symbol(u8 pattern)
+{
+	return pattern & ~DP_LINK_SCRAMBLING_DISABLE;
+}
+
+void intel_dp_128b132b_sdp_crc16(struct intel_dp *intel_dp,
+				 const struct intel_crtc_state *crtc_state);
+
+void intel_dp_link_training_debugfs_add(struct intel_connector *connector);
+
+#endif /* __INTEL_DP_LINK_TRAINING_H__ */