1/* SPDX-License-Identifier: MIT */
 2/*
 3 * Copyright © 2019 Intel Corporation
 4 */
 5
 6#ifndef __INTEL_DP_LINK_TRAINING_H__
 7#define __INTEL_DP_LINK_TRAINING_H__
 8
 9#include <drm/drm_dp_helper.h>
10
11struct intel_crtc_state;
12struct intel_dp;
13
14int intel_dp_init_lttpr_and_dprx_caps(struct intel_dp *intel_dp);
15
16void intel_dp_get_adjust_train(struct intel_dp *intel_dp,
17			       const struct intel_crtc_state *crtc_state,
18			       enum drm_dp_phy dp_phy,
19			       const u8 link_status[DP_LINK_STATUS_SIZE]);
20void intel_dp_program_link_training_pattern(struct intel_dp *intel_dp,
21					    const struct intel_crtc_state *crtc_state,
22					    u8 dp_train_pat);
23void intel_dp_set_signal_levels(struct intel_dp *intel_dp,
24				const struct intel_crtc_state *crtc_state,
25				enum drm_dp_phy dp_phy);
26void intel_dp_start_link_train(struct intel_dp *intel_dp,
27			       const struct intel_crtc_state *crtc_state);
28void intel_dp_stop_link_train(struct intel_dp *intel_dp,
29			      const struct intel_crtc_state *crtc_state);
30
31/* Get the TPSx symbol type of the value programmed to DP_TRAINING_PATTERN_SET */
32static inline u8 intel_dp_training_pattern_symbol(u8 pattern)
33{
34	return pattern & ~DP_LINK_SCRAMBLING_DISABLE;
35}
36
37#endif /* __INTEL_DP_LINK_TRAINING_H__ */