drivers/gpu/drm/i915/display/intel_dp_link_training.h

   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_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 /* Get the TPSx symbol type of the value programmed to DP_TRAINING_PATTERN_SET */
  33 static inline u8 intel_dp_training_pattern_symbol(u8 pattern)
  34 {
  35         return pattern & ~DP_LINK_SCRAMBLING_DISABLE;
  36 }
  37
  38 #endif /* __INTEL_DP_LINK_TRAINING_H__ */