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__ */

 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/display/drm_dp_helper.h>
10
11struct intel_atomic_state;
12struct intel_connector;
13struct intel_crtc_state;
14struct intel_dp;
15
16int intel_dp_read_dprx_caps(struct intel_dp *intel_dp, u8 dpcd[DP_RECEIVER_CAP_SIZE]);
17int intel_dp_init_lttpr_and_dprx_caps(struct intel_dp *intel_dp);
18
19void intel_dp_link_training_set_mode(struct intel_dp *intel_dp,
20				     int link_rate, bool is_vrr);
21void intel_dp_link_training_set_bw(struct intel_dp *intel_dp,
22				   int link_bw, int rate_select, int lane_count,
23				   bool enhanced_framing);
24
25void intel_dp_get_adjust_train(struct intel_dp *intel_dp,
26			       const struct intel_crtc_state *crtc_state,
27			       enum drm_dp_phy dp_phy,
28			       const u8 link_status[DP_LINK_STATUS_SIZE]);
29void intel_dp_program_link_training_pattern(struct intel_dp *intel_dp,
30					    const struct intel_crtc_state *crtc_state,
31					    enum drm_dp_phy dp_phy,
32					    u8 dp_train_pat);
33void intel_dp_set_signal_levels(struct intel_dp *intel_dp,
34				const struct intel_crtc_state *crtc_state,
35				enum drm_dp_phy dp_phy);
36void intel_dp_start_link_train(struct intel_atomic_state *state,
37			       struct intel_dp *intel_dp,
38			       const struct intel_crtc_state *crtc_state);
39void intel_dp_stop_link_train(struct intel_dp *intel_dp,
40			      const struct intel_crtc_state *crtc_state);
41
42void
43intel_dp_dump_link_status(struct intel_dp *intel_dp, enum drm_dp_phy dp_phy,
44			  const u8 link_status[DP_LINK_STATUS_SIZE]);
45
46/* Get the TPSx symbol type of the value programmed to DP_TRAINING_PATTERN_SET */
47static inline u8 intel_dp_training_pattern_symbol(u8 pattern)
48{
49	return pattern & ~DP_LINK_SCRAMBLING_DISABLE;
50}
51
52void intel_dp_128b132b_sdp_crc16(struct intel_dp *intel_dp,
53				 const struct intel_crtc_state *crtc_state);
54
55void intel_dp_link_training_debugfs_add(struct intel_connector *connector);
56
57#endif /* __INTEL_DP_LINK_TRAINING_H__ */