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