git: c5daa5a4c32c - main - acpi_spmc: Add system power management controller driver
Date: Mon, 26 Jan 2026 13:42:54 UTC
The branch main has been updated by obiwac:
URL: https://cgit.FreeBSD.org/src/commit/?id=c5daa5a4c32c9b1ecb506ddf1a80579c93c3ea6d
commit c5daa5a4c32c9b1ecb506ddf1a80579c93c3ea6d
Author: Aymeric Wibo <obiwac@FreeBSD.org>
AuthorDate: 2025-06-14 15:30:44 +0000
Commit: Aymeric Wibo <obiwac@FreeBSD.org>
CommitDate: 2026-01-26 13:42:11 +0000
acpi_spmc: Add system power management controller driver
Add SPMC (system power management controller) driver as acpi_spmc. This
is the device which provides the LPI device D-state constraints and
allows for OSPM to send S0ix/modern standby entry/exit notifications.
This supports the original Intel DSM
(https://uefi.org/sites/default/files/resources/Intel_ACPI_Low_Power_S0_Idle.pdf,
untested), the AMD DSM (tested), and the Microsoft DSM (tested).
Before entry, acpi_spmc_check_constraints is called to notify of any
violated power constraints. This will use acpi_pwr_get_state to get
current device D-states when that gets added back.
Reviewed by: olce
Tested by: jkim, Oleksandr Kryvulia, Matthias Lanter
Approved by: olce
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D48387
---
share/man/man4/acpi.4 | 4 +-
sys/conf/files | 1 +
sys/dev/acpica/acpi.c | 1 +
sys/dev/acpica/acpi_spmc.c | 618 +++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 623 insertions(+), 1 deletion(-)
diff --git a/share/man/man4/acpi.4 b/share/man/man4/acpi.4
index cdad3ceeedfc..9c24635c561d 100644
--- a/share/man/man4/acpi.4
+++ b/share/man/man4/acpi.4
@@ -486,10 +486,12 @@ Embedded controller driver
Fan driver
.It Li ACPI_OEM
Platform-specific driver for hotkeys, LED, etc.
-.It Li ACPI_POWER
+.It Li ACPI_POWERRES
Power resource driver
.It Li ACPI_PROCESSOR
CPU driver
+.It Li ACPI_SPMC
+System power management controller driver
.It Li ACPI_THERMAL
Thermal zone driver
.It Li ACPI_TIMER
diff --git a/sys/conf/files b/sys/conf/files
index 66b84fea1bc0..97834f05431d 100644
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -776,6 +776,7 @@ dev/acpica/acpi_thermal.c optional acpi
dev/acpica/acpi_throttle.c optional acpi
dev/acpica/acpi_video.c optional acpi_video acpi
dev/acpica/acpi_dock.c optional acpi_dock acpi
+dev/acpica/acpi_spmc.c optional acpi
dev/adlink/adlink.c optional adlink
dev/ae/if_ae.c optional ae pci
dev/age/if_age.c optional age pci
diff --git a/sys/dev/acpica/acpi.c b/sys/dev/acpica/acpi.c
index c76bc8477537..e43ef72ca9d2 100644
--- a/sys/dev/acpica/acpi.c
+++ b/sys/dev/acpica/acpi.c
@@ -4618,6 +4618,7 @@ static struct debugtag dbg_layer[] = {
{"ACPI_FAN", ACPI_FAN},
{"ACPI_POWERRES", ACPI_POWERRES},
{"ACPI_PROCESSOR", ACPI_PROCESSOR},
+ {"ACPI_SPMC", ACPI_SPMC},
{"ACPI_THERMAL", ACPI_THERMAL},
{"ACPI_TIMER", ACPI_TIMER},
{"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
diff --git a/sys/dev/acpica/acpi_spmc.c b/sys/dev/acpica/acpi_spmc.c
new file mode 100644
index 000000000000..57593d9ccae1
--- /dev/null
+++ b/sys/dev/acpica/acpi_spmc.c
@@ -0,0 +1,618 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2024-2025 The FreeBSD Foundation
+ *
+ * This software was developed by Aymeric Wibo <obiwac@freebsd.org>
+ * under sponsorship from the FreeBSD Foundation.
+ */
+
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/bus.h>
+#include <sys/malloc.h>
+#include <sys/uuid.h>
+#include <sys/kdb.h>
+
+#include <contrib/dev/acpica/include/acpi.h>
+#include <contrib/dev/acpica/include/accommon.h>
+
+#include <dev/acpica/acpivar.h>
+
+/* Hooks for the ACPI CA debugging infrastructure */
+#define _COMPONENT ACPI_SPMC
+ACPI_MODULE_NAME("SPMC")
+
+static SYSCTL_NODE(_debug_acpi, OID_AUTO, spmc, CTLFLAG_RD | CTLFLAG_MPSAFE,
+ NULL, "SPMC debugging");
+
+static char *spmc_ids[] = {
+ "PNP0D80",
+ NULL
+};
+
+enum intel_dsm_index {
+ DSM_ENUM_FUNCTIONS = 0,
+ DSM_GET_DEVICE_CONSTRAINTS = 1,
+ DSM_GET_CRASH_DUMP_DEVICE = 2,
+ DSM_DISPLAY_OFF_NOTIF = 3,
+ DSM_DISPLAY_ON_NOTIF = 4,
+ DSM_ENTRY_NOTIF = 5,
+ DSM_EXIT_NOTIF = 6,
+ /* Only for Microsoft DSM set. */
+ DSM_MODERN_ENTRY_NOTIF = 7,
+ DSM_MODERN_EXIT_NOTIF = 8,
+};
+
+enum amd_dsm_index {
+ AMD_DSM_ENUM_FUNCTIONS = 0,
+ AMD_DSM_GET_DEVICE_CONSTRAINTS = 1,
+ AMD_DSM_ENTRY_NOTIF = 2,
+ AMD_DSM_EXIT_NOTIF = 3,
+ AMD_DSM_DISPLAY_OFF_NOTIF = 4,
+ AMD_DSM_DISPLAY_ON_NOTIF = 5,
+};
+
+enum dsm_set_flags {
+ DSM_SET_INTEL = 1 << 0,
+ DSM_SET_MS = 1 << 1,
+ DSM_SET_AMD = 1 << 2,
+};
+
+struct dsm_set {
+ enum dsm_set_flags flag;
+ const char *name;
+ int revision;
+ struct uuid uuid;
+ uint64_t dsms_expected;
+};
+
+static struct dsm_set intel_dsm_set = {
+ .flag = DSM_SET_INTEL,
+ .name = "Intel",
+ /*
+ * XXX Linux uses 1 for the revision on Intel DSMs, but doesn't explain
+ * why. The commit that introduces this links to a document mentioning
+ * revision 0, so default this to 0.
+ *
+ * The debug.acpi.spmc.intel_dsm_revision sysctl may be used to configure
+ * this just in case.
+ */
+ .revision = 0,
+ .uuid = { /* c4eb40a0-6cd2-11e2-bcfd-0800200c9a66 */
+ 0xc4eb40a0, 0x6cd2, 0x11e2, 0xbc, 0xfd,
+ {0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66},
+ },
+ .dsms_expected = DSM_GET_DEVICE_CONSTRAINTS | DSM_DISPLAY_OFF_NOTIF |
+ DSM_DISPLAY_ON_NOTIF | DSM_ENTRY_NOTIF | DSM_EXIT_NOTIF,
+};
+
+SYSCTL_INT(_debug_acpi_spmc, OID_AUTO, intel_dsm_revision, CTLFLAG_RW,
+ &intel_dsm_set.revision, 0,
+ "Revision to use when evaluating Intel SPMC DSMs");
+
+static struct dsm_set ms_dsm_set = {
+ .flag = DSM_SET_MS,
+ .name = "Microsoft",
+ .revision = 0,
+ .uuid = { /* 11e00d56-ce64-47ce-837b-1f898f9aa461 */
+ 0x11e00d56, 0xce64, 0x47ce, 0x83, 0x7b,
+ {0x1f, 0x89, 0x8f, 0x9a, 0xa4, 0x61},
+ },
+ .dsms_expected = DSM_DISPLAY_OFF_NOTIF | DSM_DISPLAY_ON_NOTIF |
+ DSM_ENTRY_NOTIF | DSM_EXIT_NOTIF | DSM_MODERN_ENTRY_NOTIF |
+ DSM_MODERN_EXIT_NOTIF,
+};
+
+static struct dsm_set amd_dsm_set = {
+ .flag = DSM_SET_AMD,
+ .name = "AMD",
+ /*
+ * XXX Linux uses 0 for the revision on AMD DSMs, but at least on the
+ * Framework 13 AMD 7040 series, the enum functions DSM only returns a
+ * function mask that covers all the DSMs we need to call when called
+ * with revision 2.
+ *
+ * The debug.acpi.spmc.amd_dsm_revision sysctl may be used to configure
+ * this just in case.
+ */
+ .revision = 2,
+ .uuid = { /* e3f32452-febc-43ce-9039-932122d37721 */
+ 0xe3f32452, 0xfebc, 0x43ce, 0x90, 0x39,
+ {0x93, 0x21, 0x22, 0xd3, 0x77, 0x21},
+ },
+ .dsms_expected = AMD_DSM_GET_DEVICE_CONSTRAINTS | AMD_DSM_ENTRY_NOTIF |
+ AMD_DSM_EXIT_NOTIF | AMD_DSM_DISPLAY_OFF_NOTIF |
+ AMD_DSM_DISPLAY_ON_NOTIF,
+};
+
+SYSCTL_INT(_debug_acpi_spmc, OID_AUTO, amd_dsm_revision, CTLFLAG_RW,
+ &amd_dsm_set.revision, 0, "Revision to use when evaluating AMD SPMC DSMs");
+
+union dsm_index {
+ int i;
+ enum intel_dsm_index regular;
+ enum amd_dsm_index amd;
+};
+
+struct acpi_spmc_constraint {
+ bool enabled;
+ char *name;
+ int min_d_state;
+ ACPI_HANDLE handle;
+
+ /* Unused, spec only. */
+ uint64_t lpi_uid;
+ uint64_t min_dev_specific_state;
+
+ /* Unused, AMD only. */
+ uint64_t function_states;
+};
+
+struct acpi_spmc_softc {
+ device_t dev;
+ ACPI_HANDLE handle;
+ ACPI_OBJECT *obj;
+ enum dsm_set_flags dsm_sets;
+
+ bool constraints_populated;
+ size_t constraint_count;
+ struct acpi_spmc_constraint *constraints;
+};
+
+static void acpi_spmc_check_dsm_set(struct acpi_spmc_softc *sc,
+ ACPI_HANDLE handle, struct dsm_set *dsm_set);
+static int acpi_spmc_get_constraints(device_t dev);
+static void acpi_spmc_free_constraints(struct acpi_spmc_softc *sc);
+
+static int
+acpi_spmc_probe(device_t dev)
+{
+ char *name;
+ ACPI_HANDLE handle;
+ struct acpi_spmc_softc *sc;
+
+ /* Check that this is an enabled device. */
+ if (acpi_get_type(dev) != ACPI_TYPE_DEVICE || acpi_disabled("spmc"))
+ return (ENXIO);
+
+ if (ACPI_ID_PROBE(device_get_parent(dev), dev, spmc_ids, &name) > 0)
+ return (ENXIO);
+
+ handle = acpi_get_handle(dev);
+ if (handle == NULL)
+ return (ENXIO);
+
+ sc = device_get_softc(dev);
+
+ /* Check which sets of DSM's are supported. */
+ sc->dsm_sets = 0;
+
+ acpi_spmc_check_dsm_set(sc, handle, &intel_dsm_set);
+ acpi_spmc_check_dsm_set(sc, handle, &ms_dsm_set);
+ acpi_spmc_check_dsm_set(sc, handle, &amd_dsm_set);
+
+ if (sc->dsm_sets == 0)
+ return (ENXIO);
+
+ device_set_descf(dev, "Low Power S0 Idle (DSM sets 0x%x)",
+ sc->dsm_sets);
+
+ return (0);
+}
+
+static int
+acpi_spmc_attach(device_t dev)
+{
+ struct acpi_spmc_softc *sc;
+
+ sc = device_get_softc(dev);
+ sc->dev = dev;
+
+ sc->handle = acpi_get_handle(dev);
+ if (sc->handle == NULL)
+ return (ENXIO);
+
+ sc->constraints_populated = false;
+ sc->constraint_count = 0;
+ sc->constraints = NULL;
+
+ /* Get device constraints. We can only call this once so do this now. */
+ acpi_spmc_get_constraints(sc->dev);
+
+ return (0);
+}
+
+static int
+acpi_spmc_detach(device_t dev)
+{
+ acpi_spmc_free_constraints(device_get_softc(dev));
+ return (0);
+}
+
+static void
+acpi_spmc_check_dsm_set(struct acpi_spmc_softc *sc, ACPI_HANDLE handle,
+ struct dsm_set *dsm_set)
+{
+ const uint64_t dsms_supported = acpi_DSMQuery(handle,
+ (uint8_t *)&dsm_set->uuid, dsm_set->revision);
+
+ /*
+ * Check if DSM set supported at all. We do this by checking the
+ * existence of "enum functions".
+ */
+ if ((dsms_supported & 1) == 0)
+ return;
+ if ((dsms_supported & dsm_set->dsms_expected)
+ != dsm_set->dsms_expected) {
+ device_printf(sc->dev, "DSM set %s does not support expected "
+ "DSMs (0x%lx vs 0x%lx). Some methods may fail.\n",
+ dsm_set->name, dsms_supported, dsm_set->dsms_expected);
+ }
+ sc->dsm_sets |= dsm_set->flag;
+}
+
+static void
+acpi_spmc_free_constraints(struct acpi_spmc_softc *sc)
+{
+ if (sc->constraints == NULL)
+ return;
+
+ for (size_t i = 0; i < sc->constraint_count; i++) {
+ if (sc->constraints[i].name != NULL)
+ free(sc->constraints[i].name, M_TEMP);
+ }
+
+ free(sc->constraints, M_TEMP);
+ sc->constraints = NULL;
+}
+
+static int
+acpi_spmc_get_constraints_spec(struct acpi_spmc_softc *sc, ACPI_OBJECT *object)
+{
+ struct acpi_spmc_constraint *constraint;
+ int revision;
+ ACPI_OBJECT *constraint_obj;
+ ACPI_OBJECT *name_obj;
+ ACPI_OBJECT *detail;
+ ACPI_OBJECT *constraint_package;
+
+ KASSERT(sc->constraints_populated == false,
+ ("constraints already populated"));
+
+ sc->constraint_count = object->Package.Count;
+ sc->constraints = malloc(sc->constraint_count * sizeof *sc->constraints,
+ M_TEMP, M_WAITOK | M_ZERO);
+
+ /*
+ * The value of sc->constraint_count can change during the loop, so
+ * iterate until object->Package.Count so we actually go over all
+ * elements in the package.
+ */
+ for (size_t i = 0; i < object->Package.Count; i++) {
+ constraint_obj = &object->Package.Elements[i];
+ constraint = &sc->constraints[i];
+
+ constraint->enabled =
+ constraint_obj->Package.Elements[1].Integer.Value;
+
+ name_obj = &constraint_obj->Package.Elements[0];
+ constraint->name = strdup(name_obj->String.Pointer, M_TEMP);
+ if (constraint->name == NULL) {
+ acpi_spmc_free_constraints(sc);
+ return (ENOMEM);
+ }
+
+ /*
+ * The first element in the device constraint detail package is
+ * the revision, and should always be zero.
+ */
+ revision = constraint_obj->Package.Elements[0].Integer.Value;
+ if (revision != 0) {
+ device_printf(sc->dev, "Unknown revision %d for "
+ "device constraint detail package\n", revision);
+ sc->constraint_count--;
+ continue;
+ }
+
+ detail = &constraint_obj->Package.Elements[2];
+ constraint_package = &detail->Package.Elements[1];
+
+ constraint->lpi_uid =
+ constraint_package->Package.Elements[0].Integer.Value;
+ constraint->min_d_state =
+ constraint_package->Package.Elements[1].Integer.Value;
+ constraint->min_dev_specific_state =
+ constraint_package->Package.Elements[2].Integer.Value;
+ }
+
+ sc->constraints_populated = true;
+ return (0);
+}
+
+static int
+acpi_spmc_get_constraints_amd(struct acpi_spmc_softc *sc, ACPI_OBJECT *object)
+{
+ size_t constraint_count;
+ ACPI_OBJECT *constraint_obj;
+ ACPI_OBJECT *constraints;
+ struct acpi_spmc_constraint *constraint;
+ ACPI_OBJECT *name_obj;
+
+ KASSERT(sc->constraints_populated == false,
+ ("constraints already populated"));
+
+ /*
+ * First element in the package is unknown.
+ * Second element is the number of device constraints.
+ * Third element is the list of device constraints itself.
+ */
+ constraint_count = object->Package.Elements[1].Integer.Value;
+ constraints = &object->Package.Elements[2];
+
+ if (constraints->Package.Count != constraint_count) {
+ device_printf(sc->dev, "constraint count mismatch (%d to %zu)\n",
+ constraints->Package.Count, constraint_count);
+ return (ENXIO);
+ }
+
+ sc->constraint_count = constraint_count;
+ sc->constraints = malloc(constraint_count * sizeof *sc->constraints,
+ M_TEMP, M_WAITOK | M_ZERO);
+
+ for (size_t i = 0; i < constraint_count; i++) {
+ /* Parse the constraint package. */
+ constraint_obj = &constraints->Package.Elements[i];
+ if (constraint_obj->Package.Count != 4) {
+ device_printf(sc->dev, "constraint %zu has %d elements\n",
+ i, constraint_obj->Package.Count);
+ acpi_spmc_free_constraints(sc);
+ return (ENXIO);
+ }
+
+ constraint = &sc->constraints[i];
+ constraint->enabled =
+ constraint_obj->Package.Elements[0].Integer.Value;
+
+ name_obj = &constraint_obj->Package.Elements[1];
+ constraint->name = strdup(name_obj->String.Pointer, M_TEMP);
+ if (constraint->name == NULL) {
+ acpi_spmc_free_constraints(sc);
+ return (ENOMEM);
+ }
+
+ constraint->function_states =
+ constraint_obj->Package.Elements[2].Integer.Value;
+ constraint->min_d_state =
+ constraint_obj->Package.Elements[3].Integer.Value;
+ }
+
+ sc->constraints_populated = true;
+ return (0);
+}
+
+static int
+acpi_spmc_get_constraints(device_t dev)
+{
+ struct acpi_spmc_softc *sc;
+ union dsm_index dsm_index;
+ struct dsm_set *dsm_set;
+ ACPI_STATUS status;
+ ACPI_BUFFER result;
+ ACPI_OBJECT *object;
+ bool is_amd;
+ int rv;
+ struct acpi_spmc_constraint *constraint;
+
+ sc = device_get_softc(dev);
+ if (sc->constraints_populated)
+ return (0);
+
+ /* The Microsoft DSM set doesn't have this DSM. */
+ is_amd = (sc->dsm_sets & DSM_SET_AMD) != 0;
+ if (is_amd) {
+ dsm_set = &amd_dsm_set;
+ dsm_index.amd = AMD_DSM_GET_DEVICE_CONSTRAINTS;
+ } else {
+ dsm_set = &intel_dsm_set;
+ dsm_index.regular = DSM_GET_DEVICE_CONSTRAINTS;
+ }
+
+ /* XXX It seems like this DSM fails if called more than once. */
+ status = acpi_EvaluateDSMTyped(sc->handle, (uint8_t *)&dsm_set->uuid,
+ dsm_set->revision, dsm_index.i, NULL, &result,
+ ACPI_TYPE_PACKAGE);
+ if (ACPI_FAILURE(status)) {
+ device_printf(dev, "%s failed to call %s DSM %d (rev %d)\n",
+ __func__, dsm_set->name, dsm_index.i, dsm_set->revision);
+ return (ENXIO);
+ }
+
+ object = (ACPI_OBJECT *)result.Pointer;
+ if (is_amd)
+ rv = acpi_spmc_get_constraints_amd(sc, object);
+ else
+ rv = acpi_spmc_get_constraints_spec(sc, object);
+ AcpiOsFree(object);
+ if (rv != 0)
+ return (rv);
+
+ /* Get handles for each constraint device. */
+ for (size_t i = 0; i < sc->constraint_count; i++) {
+ constraint = &sc->constraints[i];
+
+ status = acpi_GetHandleInScope(sc->handle,
+ __DECONST(char *, constraint->name), &constraint->handle);
+ if (ACPI_FAILURE(status)) {
+ device_printf(dev, "failed to get handle for %s\n",
+ constraint->name);
+ constraint->handle = NULL;
+ }
+ }
+ return (0);
+}
+
+static void
+acpi_spmc_check_constraints(struct acpi_spmc_softc *sc)
+{
+ bool violation = false;
+
+ KASSERT(sc->constraints_populated, ("constraints not populated"));
+ for (size_t i = 0; i < sc->constraint_count; i++) {
+ struct acpi_spmc_constraint *constraint = &sc->constraints[i];
+
+ if (!constraint->enabled)
+ continue;
+ if (constraint->handle == NULL)
+ continue;
+
+ ACPI_STATUS status = acpi_GetHandleInScope(sc->handle,
+ __DECONST(char *, constraint->name), &constraint->handle);
+ if (ACPI_FAILURE(status)) {
+ device_printf(sc->dev, "failed to get handle for %s\n",
+ constraint->name);
+ constraint->handle = NULL;
+ }
+ if (constraint->handle == NULL)
+ continue;
+
+#ifdef notyet
+ int d_state;
+ if (ACPI_FAILURE(acpi_pwr_get_state(constraint->handle, &d_state)))
+ continue;
+ if (d_state < constraint->min_d_state) {
+ device_printf(sc->dev, "constraint for device %s"
+ " violated (minimum D-state required was %s, actual"
+ " D-state is %s), might fail to enter LPI state\n",
+ constraint->name,
+ acpi_d_state_to_str(constraint->min_d_state),
+ acpi_d_state_to_str(d_state));
+ violation = true;
+ }
+#endif
+ }
+ if (!violation)
+ device_printf(sc->dev,
+ "all device power constraints respected!\n");
+}
+
+static void
+acpi_spmc_run_dsm(device_t dev, struct dsm_set *dsm_set, int index)
+{
+ struct acpi_spmc_softc *sc;
+ ACPI_STATUS status;
+ ACPI_BUFFER result;
+
+ sc = device_get_softc(dev);
+
+ status = acpi_EvaluateDSMTyped(sc->handle, (uint8_t *)&dsm_set->uuid,
+ dsm_set->revision, index, NULL, &result, ACPI_TYPE_ANY);
+
+ if (ACPI_FAILURE(status)) {
+ device_printf(dev, "%s failed to call %s DSM %d (rev %d)\n",
+ __func__, dsm_set->name, index, dsm_set->revision);
+ return;
+ }
+
+ AcpiOsFree(result.Pointer);
+}
+
+/*
+ * Try running the DSMs from all the DSM sets we have, as them failing costs us
+ * nothing, and it seems like on AMD platforms, both the AMD entry and Microsoft
+ * "modern" DSM's are required for it to enter modern standby.
+ *
+ * This is what Linux does too.
+ */
+static void
+acpi_spmc_display_off_notif(device_t dev)
+{
+ struct acpi_spmc_softc *sc = device_get_softc(dev);
+
+ if ((sc->dsm_sets & DSM_SET_INTEL) != 0)
+ acpi_spmc_run_dsm(dev, &intel_dsm_set, DSM_DISPLAY_OFF_NOTIF);
+ if ((sc->dsm_sets & DSM_SET_MS) != 0)
+ acpi_spmc_run_dsm(dev, &ms_dsm_set, DSM_DISPLAY_OFF_NOTIF);
+ if ((sc->dsm_sets & DSM_SET_AMD) != 0)
+ acpi_spmc_run_dsm(dev, &amd_dsm_set, AMD_DSM_DISPLAY_OFF_NOTIF);
+}
+
+static void
+acpi_spmc_display_on_notif(device_t dev)
+{
+ struct acpi_spmc_softc *sc = device_get_softc(dev);
+
+ if ((sc->dsm_sets & DSM_SET_INTEL) != 0)
+ acpi_spmc_run_dsm(dev, &intel_dsm_set, DSM_DISPLAY_ON_NOTIF);
+ if ((sc->dsm_sets & DSM_SET_MS) != 0)
+ acpi_spmc_run_dsm(dev, &ms_dsm_set, DSM_DISPLAY_ON_NOTIF);
+ if ((sc->dsm_sets & DSM_SET_AMD) != 0)
+ acpi_spmc_run_dsm(dev, &amd_dsm_set, AMD_DSM_DISPLAY_ON_NOTIF);
+}
+
+static void
+acpi_spmc_entry_notif(device_t dev)
+{
+ struct acpi_spmc_softc *sc = device_get_softc(dev);
+
+ acpi_spmc_check_constraints(sc);
+
+ if ((sc->dsm_sets & DSM_SET_AMD) != 0)
+ acpi_spmc_run_dsm(dev, &amd_dsm_set, AMD_DSM_ENTRY_NOTIF);
+ if ((sc->dsm_sets & DSM_SET_MS) != 0) {
+ acpi_spmc_run_dsm(dev, &ms_dsm_set, DSM_MODERN_ENTRY_NOTIF);
+ acpi_spmc_run_dsm(dev, &ms_dsm_set, DSM_ENTRY_NOTIF);
+ }
+ if ((sc->dsm_sets & DSM_SET_INTEL) != 0)
+ acpi_spmc_run_dsm(dev, &intel_dsm_set, DSM_ENTRY_NOTIF);
+}
+
+static void
+acpi_spmc_exit_notif(device_t dev)
+{
+ struct acpi_spmc_softc *sc = device_get_softc(dev);
+
+ if ((sc->dsm_sets & DSM_SET_INTEL) != 0)
+ acpi_spmc_run_dsm(dev, &intel_dsm_set, DSM_EXIT_NOTIF);
+ if ((sc->dsm_sets & DSM_SET_AMD) != 0)
+ acpi_spmc_run_dsm(dev, &amd_dsm_set, AMD_DSM_EXIT_NOTIF);
+ if ((sc->dsm_sets & DSM_SET_MS) != 0) {
+ acpi_spmc_run_dsm(dev, &ms_dsm_set, DSM_EXIT_NOTIF);
+ acpi_spmc_run_dsm(dev, &ms_dsm_set, DSM_MODERN_EXIT_NOTIF);
+ }
+}
+
+static int
+acpi_spmc_suspend(device_t dev)
+{
+ acpi_spmc_display_off_notif(dev);
+ acpi_spmc_entry_notif(dev);
+
+ return (0);
+}
+
+static int
+acpi_spmc_resume(device_t dev)
+{
+ acpi_spmc_exit_notif(dev);
+ acpi_spmc_display_on_notif(dev);
+
+ return (0);
+}
+
+static device_method_t acpi_spmc_methods[] = {
+ DEVMETHOD(device_probe, acpi_spmc_probe),
+ DEVMETHOD(device_attach, acpi_spmc_attach),
+ DEVMETHOD(device_detach, acpi_spmc_detach),
+ DEVMETHOD_END
+};
+
+static driver_t acpi_spmc_driver = {
+ "acpi_spmc",
+ acpi_spmc_methods,
+ sizeof(struct acpi_spmc_softc),
+};
+
+DRIVER_MODULE_ORDERED(acpi_spmc, acpi, acpi_spmc_driver, NULL, NULL, SI_ORDER_ANY);
+MODULE_DEPEND(acpi_spmc, acpi, 1, 1, 1);