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1/* SPDX-License-Identifier: MIT */2/*3 * Copyright © 2019 Intel Corporation4 */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 42void43intel_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__ */58