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 
11 struct intel_crtc_state;
12 struct intel_dp;
13 
14 int intel_dp_lttpr_init(struct intel_dp *intel_dp);
15 
16 void 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]);
20 void intel_dp_set_signal_levels(struct intel_dp *intel_dp,
21 				const struct intel_crtc_state *crtc_state,
22 				enum drm_dp_phy dp_phy);
23 void intel_dp_start_link_train(struct intel_dp *intel_dp,
24 			       const struct intel_crtc_state *crtc_state);
25 void intel_dp_stop_link_train(struct intel_dp *intel_dp,
26 			      const struct intel_crtc_state *crtc_state);
27 
28 /* Get the TPSx symbol type of the value programmed to DP_TRAINING_PATTERN_SET */
29 static inline u8 intel_dp_training_pattern_symbol(u8 pattern)
30 {
31 	return pattern & ~DP_LINK_SCRAMBLING_DISABLE;
32 }
33 
34 #endif /* __INTEL_DP_LINK_TRAINING_H__ */
35