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_read_dprx_caps(struct intel_dp *intel_dp, u8 dpcd[DP_RECEIVER_CAP_SIZE]); 15 int intel_dp_init_lttpr_and_dprx_caps(struct intel_dp *intel_dp); 16 17 void intel_dp_get_adjust_train(struct intel_dp *intel_dp, 18 const struct intel_crtc_state *crtc_state, 19 enum drm_dp_phy dp_phy, 20 const u8 link_status[DP_LINK_STATUS_SIZE]); 21 void intel_dp_program_link_training_pattern(struct intel_dp *intel_dp, 22 const struct intel_crtc_state *crtc_state, 23 enum drm_dp_phy dp_phy, 24 u8 dp_train_pat); 25 void intel_dp_set_signal_levels(struct intel_dp *intel_dp, 26 const struct intel_crtc_state *crtc_state, 27 enum drm_dp_phy dp_phy); 28 void intel_dp_start_link_train(struct intel_dp *intel_dp, 29 const struct intel_crtc_state *crtc_state); 30 void intel_dp_stop_link_train(struct intel_dp *intel_dp, 31 const struct intel_crtc_state *crtc_state); 32 33 void 34 intel_dp_dump_link_status(struct intel_dp *intel_dp, enum drm_dp_phy dp_phy, 35 const u8 link_status[DP_LINK_STATUS_SIZE]); 36 37 /* Get the TPSx symbol type of the value programmed to DP_TRAINING_PATTERN_SET */ 38 static inline u8 intel_dp_training_pattern_symbol(u8 pattern) 39 { 40 return pattern & ~DP_LINK_SCRAMBLING_DISABLE; 41 } 42 43 void intel_dp_128b132b_sdp_crc16(struct intel_dp *intel_dp, 44 const struct intel_crtc_state *crtc_state); 45 #endif /* __INTEL_DP_LINK_TRAINING_H__ */ 46