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Usually retimers take around 30 to 40ms to exit all devices from sleep state. Extended wake timeout mechanism helps to give that additional time. --v2 -Grant the requested time only if greater than 1ms [Arun/Jani] -Reframe commit message [Arun] --v3 -Move the function to drm_core [Dmitry/Jani] Spec: DP v2.1 Section 3.6.12.3 Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com> Reviewed-by: Arun R Murthy <arun.r.murthy@intel.com> Acked-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20250122053358.1545039-4-suraj.kandpal@intel.com
59 lines
2.1 KiB
C
59 lines
2.1 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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bool intel_dp_lttpr_transparent_mode_enabled(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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