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_atomic_state; 12 struct intel_connector; 13 struct intel_crtc_state; 14 struct intel_dp; 15 16 int intel_dp_read_dprx_caps(struct intel_dp *intel_dp, u8 dpcd[DP_RECEIVER_CAP_SIZE]); 17 int intel_dp_init_lttpr_and_dprx_caps(struct intel_dp *intel_dp); 18 19 void intel_dp_link_training_set_mode(struct intel_dp *intel_dp, 20 int link_rate, bool is_vrr); 21 void 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 25 void 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]); 29 void 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); 33 void 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); 36 void intel_dp_start_link_train(struct intel_atomic_state *state, 37 struct intel_dp *intel_dp, 38 const struct intel_crtc_state *crtc_state); 39 void intel_dp_stop_link_train(struct intel_dp *intel_dp, 40 const struct intel_crtc_state *crtc_state); 41 42 void 43 intel_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 */ 47 static inline u8 intel_dp_training_pattern_symbol(u8 pattern) 48 { 49 return pattern & ~DP_LINK_SCRAMBLING_DISABLE; 50 } 51 52 void intel_dp_128b132b_sdp_crc16(struct intel_dp *intel_dp, 53 const struct intel_crtc_state *crtc_state); 54 55 void intel_dp_link_training_debugfs_add(struct intel_connector *connector); 56 57 #endif /* __INTEL_DP_LINK_TRAINING_H__ */ 58