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/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__ */