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 11 struct intel_crtc_state; 12 struct intel_dp; 13 14 int intel_dp_init_lttpr_and_dprx_caps(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_program_link_training_pattern(struct intel_dp *intel_dp, 21 const struct intel_crtc_state *crtc_state, 22 enum drm_dp_phy dp_phy, 23 u8 dp_train_pat); 24 void intel_dp_set_signal_levels(struct intel_dp *intel_dp, 25 const struct intel_crtc_state *crtc_state, 26 enum drm_dp_phy dp_phy); 27 void intel_dp_start_link_train(struct intel_dp *intel_dp, 28 const struct intel_crtc_state *crtc_state); 29 void intel_dp_stop_link_train(struct intel_dp *intel_dp, 30 const struct intel_crtc_state *crtc_state); 31 32 void 33 intel_dp_dump_link_status(struct intel_dp *intel_dp, enum drm_dp_phy dp_phy, 34 const u8 link_status[DP_LINK_STATUS_SIZE]); 35 36 /* Get the TPSx symbol type of the value programmed to DP_TRAINING_PATTERN_SET */ 37 static inline u8 intel_dp_training_pattern_symbol(u8 pattern) 38 { 39 return pattern & ~DP_LINK_SCRAMBLING_DISABLE; 40 } 41 42 #endif /* __INTEL_DP_LINK_TRAINING_H__ */ 43