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 bool intel_dp_lttpr_transparent_mode_enabled(struct intel_dp *intel_dp); 19 20 void intel_dp_link_training_set_mode(struct intel_dp *intel_dp, 21 int link_rate, bool is_vrr); 22 void intel_dp_link_training_set_bw(struct intel_dp *intel_dp, 23 int link_bw, int rate_select, int lane_count, 24 bool enhanced_framing); 25 26 void intel_dp_get_adjust_train(struct intel_dp *intel_dp, 27 const struct intel_crtc_state *crtc_state, 28 enum drm_dp_phy dp_phy, 29 const u8 link_status[DP_LINK_STATUS_SIZE]); 30 void intel_dp_program_link_training_pattern(struct intel_dp *intel_dp, 31 const struct intel_crtc_state *crtc_state, 32 enum drm_dp_phy dp_phy, 33 u8 dp_train_pat); 34 void intel_dp_set_signal_levels(struct intel_dp *intel_dp, 35 const struct intel_crtc_state *crtc_state, 36 enum drm_dp_phy dp_phy); 37 void intel_dp_start_link_train(struct intel_atomic_state *state, 38 struct intel_dp *intel_dp, 39 const struct intel_crtc_state *crtc_state); 40 void intel_dp_stop_link_train(struct intel_dp *intel_dp, 41 const struct intel_crtc_state *crtc_state); 42 43 void 44 intel_dp_dump_link_status(struct intel_dp *intel_dp, enum drm_dp_phy dp_phy, 45 const u8 link_status[DP_LINK_STATUS_SIZE]); 46 47 /* Get the TPSx symbol type of the value programmed to DP_TRAINING_PATTERN_SET */ 48 static inline u8 intel_dp_training_pattern_symbol(u8 pattern) 49 { 50 return pattern & ~DP_LINK_SCRAMBLING_DISABLE; 51 } 52 53 void intel_dp_128b132b_sdp_crc16(struct intel_dp *intel_dp, 54 const struct intel_crtc_state *crtc_state); 55 56 void intel_dp_link_training_debugfs_add(struct intel_connector *connector); 57 58 #endif /* __INTEL_DP_LINK_TRAINING_H__ */ 59