96c468c366
Add helpers to set the link mode and BW parameters. These are required by a follow-up patch setting the parameters for a disabled link. Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240722165503.2084999-9-imre.deak@intel.com
57 lines
2 KiB
C
57 lines
2 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2019 Intel Corporation
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*/
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#ifndef __INTEL_DP_LINK_TRAINING_H__
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#define __INTEL_DP_LINK_TRAINING_H__
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#include <drm/display/drm_dp_helper.h>
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struct intel_atomic_state;
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struct intel_connector;
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struct intel_crtc_state;
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struct intel_dp;
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int intel_dp_read_dprx_caps(struct intel_dp *intel_dp, u8 dpcd[DP_RECEIVER_CAP_SIZE]);
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int intel_dp_init_lttpr_and_dprx_caps(struct intel_dp *intel_dp);
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void intel_dp_link_training_set_mode(struct intel_dp *intel_dp,
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int link_rate, bool is_vrr);
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void intel_dp_link_training_set_bw(struct intel_dp *intel_dp,
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int link_bw, int rate_select, int lane_count,
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bool enhanced_framing);
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void intel_dp_get_adjust_train(struct intel_dp *intel_dp,
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const struct intel_crtc_state *crtc_state,
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enum drm_dp_phy dp_phy,
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const u8 link_status[DP_LINK_STATUS_SIZE]);
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void intel_dp_program_link_training_pattern(struct intel_dp *intel_dp,
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const struct intel_crtc_state *crtc_state,
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enum drm_dp_phy dp_phy,
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u8 dp_train_pat);
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void intel_dp_set_signal_levels(struct intel_dp *intel_dp,
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const struct intel_crtc_state *crtc_state,
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enum drm_dp_phy dp_phy);
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void intel_dp_start_link_train(struct intel_atomic_state *state,
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struct intel_dp *intel_dp,
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const struct intel_crtc_state *crtc_state);
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void intel_dp_stop_link_train(struct intel_dp *intel_dp,
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const struct intel_crtc_state *crtc_state);
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void
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intel_dp_dump_link_status(struct intel_dp *intel_dp, enum drm_dp_phy dp_phy,
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const u8 link_status[DP_LINK_STATUS_SIZE]);
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/* Get the TPSx symbol type of the value programmed to DP_TRAINING_PATTERN_SET */
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static inline u8 intel_dp_training_pattern_symbol(u8 pattern)
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{
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return pattern & ~DP_LINK_SCRAMBLING_DISABLE;
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}
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void intel_dp_128b132b_sdp_crc16(struct intel_dp *intel_dp,
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const struct intel_crtc_state *crtc_state);
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void intel_dp_link_training_debugfs_add(struct intel_connector *connector);
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#endif /* __INTEL_DP_LINK_TRAINING_H__ */
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