The branch main has been updated by obiwac: URL: https://cgit.FreeBSD.org/src/commit/?id=7e5ab1857817e7be85f012d41239711ef66ebdf6
commit 7e5ab1857817e7be85f012d41239711ef66ebdf6 Author: Aymeric Wibo <[email protected]> AuthorDate: 2025-09-28 16:06:53 +0000 Commit: Aymeric Wibo <[email protected]> CommitDate: 2025-09-28 16:07:27 +0000 Revert "acpi_powerres: `acpi_pwr_get_state` and getting initial D-state for device" Setting ACPI D-states is generally broken on FreeBSD and this change surfaced an issue. So reverting for the time being whilst I write a proper fix for this. This reverts commit 02a8fadd2c4dc4b78d6d93d9d8b70e9348a6de6d. Reported by: glebius, phk Tested by: glebius Sponsored by: The FreeBSD Foundation --- sys/dev/acpica/acpi_powerres.c | 164 ++--------------------------------------- sys/dev/acpica/acpivar.h | 1 - 2 files changed, 5 insertions(+), 160 deletions(-) diff --git a/sys/dev/acpica/acpi_powerres.c b/sys/dev/acpica/acpi_powerres.c index 0a8b67a5fa84..0baa5c595470 100644 --- a/sys/dev/acpica/acpi_powerres.c +++ b/sys/dev/acpica/acpi_powerres.c @@ -117,8 +117,6 @@ static struct acpi_powerresource *acpi_pwr_find_resource(ACPI_HANDLE res); static struct acpi_powerconsumer *acpi_pwr_find_consumer(ACPI_HANDLE consumer); -static ACPI_STATUS acpi_pwr_infer_state(struct acpi_powerconsumer *pc); -static ACPI_STATUS acpi_pwr_get_state_locked(ACPI_HANDLE consumer, int *state); /* * Register a power resource. @@ -346,9 +344,8 @@ acpi_pwr_register_consumer(ACPI_HANDLE consumer) return_ACPI_STATUS (status); } - /* Find its initial state. */ - if (ACPI_FAILURE(acpi_pwr_get_state_locked(consumer, &pc->ac_state))) - pc->ac_state = ACPI_STATE_UNKNOWN; + /* XXX we should try to find its current state */ + pc->ac_state = ACPI_STATE_UNKNOWN; ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "registered power consumer %s\n", acpi_name(consumer))); @@ -392,137 +389,7 @@ acpi_pwr_deregister_consumer(ACPI_HANDLE consumer) } /* - * The _PSC control method isn't required if it's possible to infer the D-state - * from the _PRx control methods. (See 7.3.6.) - * We can infer that a given D-state has been achieved when all the dependencies - * are in the ON state. - */ -static ACPI_STATUS -acpi_pwr_infer_state(struct acpi_powerconsumer *pc) -{ - ACPI_HANDLE *res; - uint32_t on; - bool all_on = false; - - ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); - ACPI_SERIAL_ASSERT(powerres); - - /* It is important we go from the hottest to the coldest state. */ - for ( - pc->ac_state = ACPI_STATE_D0; - pc->ac_state <= ACPI_STATE_D3_HOT && !all_on; - pc->ac_state++ - ) { - MPASS(pc->ac_state <= sizeof(pc->ac_prx) / sizeof(*pc->ac_prx)); - - if (!pc->ac_prx[pc->ac_state].prx_has) - continue; - - all_on = true; - - for (size_t i = 0; i < pc->ac_prx[pc->ac_state].prx_count; i++) { - res = pc->ac_prx[pc->ac_state].prx_deps[i]; - /* If failure, better to assume D-state is hotter than colder. */ - if (ACPI_FAILURE(acpi_GetInteger(res, "_STA", &on))) - continue; - if (on == 0) { - all_on = false; - break; - } - } - } - - MPASS(pc->ac_state != ACPI_STATE_D0); - - /* - * If none of the power resources required for the shallower D-states are - * on, then we can assume it is unpowered (i.e. D3cold). A device is not - * required to support D3cold however; in that case, _PR3 is not explicitly - * provided. Those devices should default to D3hot instead. - * - * See comments of first row of table 7.1 in ACPI spec. - */ - if (!all_on) - pc->ac_state = pc->ac_prx[ACPI_STATE_D3_HOT].prx_has ? - ACPI_STATE_D3_COLD : ACPI_STATE_D3_HOT; - else - pc->ac_state--; - - return_ACPI_STATUS (AE_OK); -} - -static ACPI_STATUS -acpi_pwr_get_state_locked(ACPI_HANDLE consumer, int *state) -{ - struct acpi_powerconsumer *pc; - ACPI_HANDLE method_handle; - ACPI_STATUS status; - ACPI_BUFFER result; - ACPI_OBJECT *object = NULL; - - ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); - ACPI_SERIAL_ASSERT(powerres); - - if (consumer == NULL) - return_ACPI_STATUS (AE_NOT_FOUND); - - if ((pc = acpi_pwr_find_consumer(consumer)) == NULL) { - if (ACPI_FAILURE(status = acpi_pwr_register_consumer(consumer))) - goto out; - if ((pc = acpi_pwr_find_consumer(consumer)) == NULL) - panic("acpi added power consumer but can't find it"); - } - - status = AcpiGetHandle(consumer, "_PSC", &method_handle); - if (ACPI_FAILURE(status)) { - ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "no _PSC object - %s\n", - AcpiFormatException(status))); - status = acpi_pwr_infer_state(pc); - if (ACPI_FAILURE(status)) { - ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "couldn't infer D-state - %s\n", - AcpiFormatException(status))); - pc->ac_state = ACPI_STATE_UNKNOWN; - } - goto out; - } - - result.Pointer = NULL; - result.Length = ACPI_ALLOCATE_BUFFER; - status = AcpiEvaluateObjectTyped(method_handle, NULL, NULL, &result, ACPI_TYPE_INTEGER); - if (ACPI_FAILURE(status) || result.Pointer == NULL) { - ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "failed to get state with _PSC - %s\n", - AcpiFormatException(status))); - pc->ac_state = ACPI_STATE_UNKNOWN; - goto out; - } - - object = (ACPI_OBJECT *)result.Pointer; - pc->ac_state = ACPI_STATE_D0 + object->Integer.Value; - status = AE_OK; - -out: - if (object != NULL) - AcpiOsFree(object); - *state = pc->ac_state; - return_ACPI_STATUS (status); -} - -/* - * Get a power consumer's D-state. - */ -ACPI_STATUS -acpi_pwr_get_state(ACPI_HANDLE consumer, int *state) -{ - ACPI_STATUS res; - - ACPI_SERIAL_BEGIN(powerres); - res = acpi_pwr_get_state_locked(consumer, state); - ACPI_SERIAL_END(powerres); - return (res); -} - -/* - * Set a power consumer to a particular D-state. + * Set a power consumer to a particular power state. */ ACPI_STATUS acpi_pwr_switch_consumer(ACPI_HANDLE consumer, int state) @@ -533,7 +400,6 @@ acpi_pwr_switch_consumer(ACPI_HANDLE consumer, int state) ACPI_OBJECT *reslist_object; ACPI_STATUS status; char *method_name, *reslist_name = NULL; - int new_state; ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); @@ -735,28 +601,8 @@ acpi_pwr_switch_consumer(ACPI_HANDLE consumer, int state) } } - /* - * Make sure the transition succeeded. If getting new state failed, - * just assume the new state is what we wanted. This was the behaviour - * before we were checking D-states. - */ - if (ACPI_FAILURE(acpi_pwr_get_state_locked(consumer, &new_state))) { - printf("%s: failed to get new D-state\n", __func__); - pc->ac_state = state; - } else { - if (new_state != state) - printf("%s: new power state %s is not the one requested %s\n", - __func__, acpi_d_state_to_str(new_state), - acpi_d_state_to_str(state)); - pc->ac_state = new_state; - } - - /* - * We consider the transition successful even if the state we got doesn't - * reflect what we set it to. This is because we weren't previously - * checking the new state at all, so there might exist buggy platforms on - * which suspend would otherwise succeed if we failed here. - */ + /* Transition was successful */ + pc->ac_state = state; status = AE_OK; out: diff --git a/sys/dev/acpica/acpivar.h b/sys/dev/acpica/acpivar.h index 4c789dd3e9f2..71d8e46ab310 100644 --- a/sys/dev/acpica/acpivar.h +++ b/sys/dev/acpica/acpivar.h @@ -490,7 +490,6 @@ EVENTHANDLER_DECLARE(acpi_video_event, acpi_event_handler_t); /* Device power control. */ ACPI_STATUS acpi_pwr_wake_enable(ACPI_HANDLE consumer, int enable); -ACPI_STATUS acpi_pwr_get_state(ACPI_HANDLE consumer, int *state); ACPI_STATUS acpi_pwr_switch_consumer(ACPI_HANDLE consumer, int state); acpi_pwr_for_sleep_t acpi_device_pwr_for_sleep; int acpi_set_powerstate(device_t child, int state);
