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2e4b90fbe7
Glitches deasserting the connector HPD line can lead to incorrectly detecting a disconnect event (a glitch asserting the line will only cause a redundant connect->disconnect transition). The source of such a glitch can be noise on the line or a 0.5ms-1ms MST IRQ_HPD pulse. TypeC ports in the DP-alt or TBT-alt mode filter out these glitches inernally, but for others the driver has to do this. Make it so by polling the HPD line on these connectors for 4 ms. Link: https://patchwork.freedesktop.org/patch/msgid/20240104083008.2715733-12-imre.deak@intel.com Reviewed-by: Jouni Högander <jouni.hogander@intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com>
46 lines
1.9 KiB
C
46 lines
1.9 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_TC_H__
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#define __INTEL_TC_H__
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#include <linux/types.h>
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struct intel_crtc_state;
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struct intel_digital_port;
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struct intel_encoder;
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bool intel_tc_port_in_tbt_alt_mode(struct intel_digital_port *dig_port);
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bool intel_tc_port_in_dp_alt_mode(struct intel_digital_port *dig_port);
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bool intel_tc_port_in_legacy_mode(struct intel_digital_port *dig_port);
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bool intel_tc_port_handles_hpd_glitches(struct intel_digital_port *dig_port);
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bool intel_tc_port_connected(struct intel_encoder *encoder);
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u32 intel_tc_port_get_pin_assignment_mask(struct intel_digital_port *dig_port);
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int intel_tc_port_max_lane_count(struct intel_digital_port *dig_port);
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void intel_tc_port_set_fia_lane_count(struct intel_digital_port *dig_port,
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int required_lanes);
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void intel_tc_port_init_mode(struct intel_digital_port *dig_port);
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void intel_tc_port_sanitize_mode(struct intel_digital_port *dig_port,
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const struct intel_crtc_state *crtc_state);
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void intel_tc_port_lock(struct intel_digital_port *dig_port);
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void intel_tc_port_unlock(struct intel_digital_port *dig_port);
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void intel_tc_port_suspend(struct intel_digital_port *dig_port);
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void intel_tc_port_get_link(struct intel_digital_port *dig_port,
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int required_lanes);
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void intel_tc_port_put_link(struct intel_digital_port *dig_port);
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bool intel_tc_port_ref_held(struct intel_digital_port *dig_port);
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bool intel_tc_port_link_needs_reset(struct intel_digital_port *dig_port);
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bool intel_tc_port_link_reset(struct intel_digital_port *dig_port);
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void intel_tc_port_link_cancel_reset_work(struct intel_digital_port *dig_port);
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int intel_tc_port_init(struct intel_digital_port *dig_port, bool is_legacy);
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void intel_tc_port_cleanup(struct intel_digital_port *dig_port);
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bool intel_tc_cold_requires_aux_pw(struct intel_digital_port *dig_port);
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#endif /* __INTEL_TC_H__ */
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