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__ */ 38