linux/drivers/platform/x86/amd/pmc/pmc-quirks.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * AMD SoC Power Management Controller Driver Quirks
 *
 * Copyright (c) 2023, Advanced Micro Devices, Inc.
 * All Rights Reserved.
 *
 * Author: Mario Limonciello <[email protected]>
 */

#include <linux/dmi.h>
#include <linux/io.h>
#include <linux/ioport.h>

#include "pmc.h"

struct quirk_entry { … };

static struct quirk_entry quirk_s2idle_bug = …;

static struct quirk_entry quirk_spurious_8042 = …;

static const struct dmi_system_id fwbug_list[] = …;

/*
 * Laptops that run a SMI handler during the D3->D0 transition that occurs
 * specifically when exiting suspend to idle which can cause
 * large delays during resume when the IOMMU translation layer is enabled (the default
 * behavior) for NVME devices:
 *
 * To avoid this firmware problem, skip the SMI handler on these machines before the
 * D0 transition occurs.
 */
static void amd_pmc_skip_nvme_smi_handler(u32 s2idle_bug_mmio)
{ … }

void amd_pmc_process_restore_quirks(struct amd_pmc_dev *dev)
{ … }

void amd_pmc_quirks_init(struct amd_pmc_dev *dev)
{ … }