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author | 2017-09-04 00:06:02 +0200 | |
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committer | 2017-09-04 00:06:02 +0200 | |
commit | 7b01463e51f6849d0787b24d06a62efcb243dd44 (patch) | |
tree | c084f9b5290fe4b6f279e711c0ada7be9dca8b32 /drivers/acpi | |
parent | Merge branch 'pm-cpuidle' (diff) | |
parent | ACPI / PM: Check low power idle constraints for debug only (diff) | |
download | linux-7b01463e51f6849d0787b24d06a62efcb243dd44.tar.gz linux-7b01463e51f6849d0787b24d06a62efcb243dd44.tar.bz2 linux-7b01463e51f6849d0787b24d06a62efcb243dd44.zip |
Merge branch 'pm-sleep'
* pm-sleep:
ACPI / PM: Check low power idle constraints for debug only
PM / s2idle: Rename platform operations structure
PM / s2idle: Rename ->enter_freeze to ->enter_s2idle
PM / s2idle: Rename freeze_state enum and related items
PM / s2idle: Rename PM_SUSPEND_FREEZE to PM_SUSPEND_TO_IDLE
ACPI / PM: Prefer suspend-to-idle over S3 on some systems
platform/x86: intel-hid: Wake up Dell Latitude 7275 from suspend-to-idle
PM / suspend: Define pr_fmt() in suspend.c
PM / suspend: Use mem_sleep_labels[] strings in messages
PM / sleep: Put pm_test under CONFIG_PM_SLEEP_DEBUG
PM / sleep: Check pm_wakeup_pending() in __device_suspend_noirq()
PM / core: Add error argument to dpm_show_time()
PM / core: Split dpm_suspend_noirq() and dpm_resume_noirq()
PM / s2idle: Rearrange the main suspend-to-idle loop
PM / timekeeping: Print debug messages when requested
PM / sleep: Mark suspend/hibernation start and finish
PM / sleep: Do not print debug messages by default
PM / suspend: Export pm_suspend_target_state
Diffstat (limited to 'drivers/acpi')
-rw-r--r-- | drivers/acpi/processor_idle.c | 6 | ||||
-rw-r--r-- | drivers/acpi/sleep.c | 202 |
2 files changed, 191 insertions, 17 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index df38e81cc672..d50a7b6ccddd 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -791,7 +791,7 @@ static int acpi_idle_enter(struct cpuidle_device *dev, return index; } -static void acpi_idle_enter_freeze(struct cpuidle_device *dev, +static void acpi_idle_enter_s2idle(struct cpuidle_device *dev, struct cpuidle_driver *drv, int index) { struct acpi_processor_cx *cx = per_cpu(acpi_cstate[index], dev->cpu); @@ -876,14 +876,14 @@ static int acpi_processor_setup_cstates(struct acpi_processor *pr) drv->safe_state_index = count; } /* - * Halt-induced C1 is not good for ->enter_freeze, because it + * Halt-induced C1 is not good for ->enter_s2idle, because it * re-enables interrupts on exit. Moreover, C1 is generally not * particularly interesting from the suspend-to-idle angle, so * avoid C1 and the situations in which we may need to fall back * to it altogether. */ if (cx->type != ACPI_STATE_C1 && !acpi_idle_fallback_to_c1(pr)) - state->enter_freeze = acpi_idle_enter_freeze; + state->enter_s2idle = acpi_idle_enter_s2idle; count++; if (count == CPUIDLE_STATE_MAX) diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index fa8243c5c062..09460d9f9208 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -669,6 +669,7 @@ static const struct acpi_device_id lps0_device_ids[] = { #define ACPI_LPS0_DSM_UUID "c4eb40a0-6cd2-11e2-bcfd-0800200c9a66" +#define ACPI_LPS0_GET_DEVICE_CONSTRAINTS 1 #define ACPI_LPS0_SCREEN_OFF 3 #define ACPI_LPS0_SCREEN_ON 4 #define ACPI_LPS0_ENTRY 5 @@ -680,6 +681,166 @@ static acpi_handle lps0_device_handle; static guid_t lps0_dsm_guid; static char lps0_dsm_func_mask; +/* Device constraint entry structure */ +struct lpi_device_info { + char *name; + int enabled; + union acpi_object *package; +}; + +/* Constraint package structure */ +struct lpi_device_constraint { + int uid; + int min_dstate; + int function_states; +}; + +struct lpi_constraints { + acpi_handle handle; + int min_dstate; +}; + +static struct lpi_constraints *lpi_constraints_table; +static int lpi_constraints_table_size; + +static void lpi_device_get_constraints(void) +{ + union acpi_object *out_obj; + int i; + + out_obj = acpi_evaluate_dsm_typed(lps0_device_handle, &lps0_dsm_guid, + 1, ACPI_LPS0_GET_DEVICE_CONSTRAINTS, + NULL, ACPI_TYPE_PACKAGE); + + acpi_handle_debug(lps0_device_handle, "_DSM function 1 eval %s\n", + out_obj ? "successful" : "failed"); + + if (!out_obj) + return; + + lpi_constraints_table = kcalloc(out_obj->package.count, + sizeof(*lpi_constraints_table), + GFP_KERNEL); + if (!lpi_constraints_table) + goto free_acpi_buffer; + + acpi_handle_debug(lps0_device_handle, "LPI: constraints list begin:\n"); + + for (i = 0; i < out_obj->package.count; i++) { + struct lpi_constraints *constraint; + acpi_status status; + union acpi_object *package = &out_obj->package.elements[i]; + struct lpi_device_info info = { }; + int package_count = 0, j; + + if (!package) + continue; + + for (j = 0; j < package->package.count; ++j) { + union acpi_object *element = + &(package->package.elements[j]); + + switch (element->type) { + case ACPI_TYPE_INTEGER: + info.enabled = element->integer.value; + break; + case ACPI_TYPE_STRING: + info.name = element->string.pointer; + break; + case ACPI_TYPE_PACKAGE: + package_count = element->package.count; + info.package = element->package.elements; + break; + } + } + + if (!info.enabled || !info.package || !info.name) + continue; + + constraint = &lpi_constraints_table[lpi_constraints_table_size]; + + status = acpi_get_handle(NULL, info.name, &constraint->handle); + if (ACPI_FAILURE(status)) + continue; + + acpi_handle_debug(lps0_device_handle, + "index:%d Name:%s\n", i, info.name); + + constraint->min_dstate = -1; + + for (j = 0; j < package_count; ++j) { + union acpi_object *info_obj = &info.package[j]; + union acpi_object *cnstr_pkg; + union acpi_object *obj; + struct lpi_device_constraint dev_info; + + switch (info_obj->type) { + case ACPI_TYPE_INTEGER: + /* version */ + break; + case ACPI_TYPE_PACKAGE: + if (info_obj->package.count < 2) + break; + + cnstr_pkg = info_obj->package.elements; + obj = &cnstr_pkg[0]; + dev_info.uid = obj->integer.value; + obj = &cnstr_pkg[1]; + dev_info.min_dstate = obj->integer.value; + + acpi_handle_debug(lps0_device_handle, + "uid:%d min_dstate:%s\n", + dev_info.uid, + acpi_power_state_string(dev_info.min_dstate)); + + constraint->min_dstate = dev_info.min_dstate; + break; + } + } + + if (constraint->min_dstate < 0) { + acpi_handle_debug(lps0_device_handle, + "Incomplete constraint defined\n"); + continue; + } + + lpi_constraints_table_size++; + } + + acpi_handle_debug(lps0_device_handle, "LPI: constraints list end\n"); + +free_acpi_buffer: + ACPI_FREE(out_obj); +} + +static void lpi_check_constraints(void) +{ + int i; + + for (i = 0; i < lpi_constraints_table_size; ++i) { + struct acpi_device *adev; + + if (acpi_bus_get_device(lpi_constraints_table[i].handle, &adev)) + continue; + + acpi_handle_debug(adev->handle, + "LPI: required min power state:%s current power state:%s\n", + acpi_power_state_string(lpi_constraints_table[i].min_dstate), + acpi_power_state_string(adev->power.state)); + + if (!adev->flags.power_manageable) { + acpi_handle_info(adev->handle, "LPI: Device not power manageble\n"); + continue; + } + + if (adev->power.state < lpi_constraints_table[i].min_dstate) + acpi_handle_info(adev->handle, + "LPI: Constraint not met; min power state:%s current power state:%s\n", + acpi_power_state_string(lpi_constraints_table[i].min_dstate), + acpi_power_state_string(adev->power.state)); + } +} + static void acpi_sleep_run_lps0_dsm(unsigned int func) { union acpi_object *out_obj; @@ -714,6 +875,12 @@ static int lps0_device_attach(struct acpi_device *adev, if ((bitmask & ACPI_S2IDLE_FUNC_MASK) == ACPI_S2IDLE_FUNC_MASK) { lps0_dsm_func_mask = bitmask; lps0_device_handle = adev->handle; + /* + * Use suspend-to-idle by default if the default + * suspend mode was not set from the command line. + */ + if (mem_sleep_default > PM_SUSPEND_MEM) + mem_sleep_current = PM_SUSPEND_TO_IDLE; } acpi_handle_debug(adev->handle, "_DSM function mask: 0x%x\n", @@ -723,6 +890,9 @@ static int lps0_device_attach(struct acpi_device *adev, "_DSM function 0 evaluation failed\n"); } ACPI_FREE(out_obj); + + lpi_device_get_constraints(); + return 0; } @@ -731,14 +901,14 @@ static struct acpi_scan_handler lps0_handler = { .attach = lps0_device_attach, }; -static int acpi_freeze_begin(void) +static int acpi_s2idle_begin(void) { acpi_scan_lock_acquire(); s2idle_in_progress = true; return 0; } -static int acpi_freeze_prepare(void) +static int acpi_s2idle_prepare(void) { if (lps0_device_handle) { acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF); @@ -758,8 +928,12 @@ static int acpi_freeze_prepare(void) return 0; } -static void acpi_freeze_wake(void) +static void acpi_s2idle_wake(void) { + + if (pm_debug_messages_on) + lpi_check_constraints(); + /* * If IRQD_WAKEUP_ARMED is not set for the SCI at this point, it means * that the SCI has triggered while suspended, so cancel the wakeup in @@ -772,7 +946,7 @@ static void acpi_freeze_wake(void) } } -static void acpi_freeze_sync(void) +static void acpi_s2idle_sync(void) { /* * Process all pending events in case there are any wakeup ones. @@ -785,7 +959,7 @@ static void acpi_freeze_sync(void) s2idle_wakeup = false; } -static void acpi_freeze_restore(void) +static void acpi_s2idle_restore(void) { if (acpi_sci_irq_valid()) disable_irq_wake(acpi_sci_irq); @@ -798,19 +972,19 @@ static void acpi_freeze_restore(void) } } -static void acpi_freeze_end(void) +static void acpi_s2idle_end(void) { s2idle_in_progress = false; acpi_scan_lock_release(); } -static const struct platform_freeze_ops acpi_freeze_ops = { - .begin = acpi_freeze_begin, - .prepare = acpi_freeze_prepare, - .wake = acpi_freeze_wake, - .sync = acpi_freeze_sync, - .restore = acpi_freeze_restore, - .end = acpi_freeze_end, +static const struct platform_s2idle_ops acpi_s2idle_ops = { + .begin = acpi_s2idle_begin, + .prepare = acpi_s2idle_prepare, + .wake = acpi_s2idle_wake, + .sync = acpi_s2idle_sync, + .restore = acpi_s2idle_restore, + .end = acpi_s2idle_end, }; static void acpi_sleep_suspend_setup(void) @@ -825,7 +999,7 @@ static void acpi_sleep_suspend_setup(void) &acpi_suspend_ops_old : &acpi_suspend_ops); acpi_scan_add_handler(&lps0_handler); - freeze_set_ops(&acpi_freeze_ops); + s2idle_set_ops(&acpi_s2idle_ops); } #else /* !CONFIG_SUSPEND */ |