bce9e7942a
This patch implements a vendor hook that changes d3hot_delay to use usleep_range() instead of msleep() to reduce the resume time from 20ms to 10ms. The call sequence is as follows: pci_pm_resume_noirq() pci_pm_default_resume_early() pci_power_up() pci_raw_set_power_state() --> msleep(10) The default d3hot_delay is 10ms. Using msleep for delays less than 20ms could result in delays up to 20ms. Reference: Documentation/timers/timers-howto.rst Using usleep_range() results in the delay being closer to 10ms and this reduces the resume time. Bug: 194231641 Change-Id: If3e4dcfb99edad302371273933fa6784854cf892 Signed-off-by: Sajid Dalvi <sdalvi@google.com>
23 lines
701 B
C
23 lines
701 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM pci
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#define TRACE_INCLUDE_PATH trace/hooks
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#if !defined(_TRACE_HOOK_PCI_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_HOOK_PCI_H
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#include <linux/tracepoint.h>
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#include <trace/hooks/vendor_hooks.h>
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/*
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* Following tracepoints are not exported in tracefs and provide a
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* mechanism for vendor modules to hook and extend functionality
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*/
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DECLARE_RESTRICTED_HOOK(android_rvh_pci_d3_sleep,
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TP_PROTO(struct pci_dev *dev, unsigned int delay, int *err),
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TP_ARGS(dev, delay, err), 1);
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#endif /* _TRACE_HOOK_PCI_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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