diff options
| -rw-r--r-- | drivers/acpi/sleep.c | 166 |
1 files changed, 157 insertions, 9 deletions
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index aff13bf4d947..b929fd0d2e04 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -710,6 +710,11 @@ static const struct acpi_device_id lps0_device_ids[] = { #define ACPI_LPS0_ENTRY 5 #define ACPI_LPS0_EXIT 6 +/* AMD */ +#define ACPI_LPS0_DSM_UUID_AMD "e3f32452-febc-43ce-9039-932122d37721" +#define ACPI_LPS0_SCREEN_OFF_AMD 4 +#define ACPI_LPS0_SCREEN_ON_AMD 5 + static acpi_handle lps0_device_handle; static guid_t lps0_dsm_guid; static char lps0_dsm_func_mask; @@ -733,8 +738,124 @@ struct lpi_constraints { int min_dstate; }; +/* AMD */ +/* Device constraint entry structure */ +struct lpi_device_info_amd { + int revision; + int count; + union acpi_object *package; +}; + +/* Constraint package structure */ +struct lpi_device_constraint_amd { + char *name; + int enabled; + int function_states; + int min_dstate; +}; + static struct lpi_constraints *lpi_constraints_table; static int lpi_constraints_table_size; +static int rev_id; + +static void lpi_device_get_constraints_amd(void) +{ + union acpi_object *out_obj; + int i, j, k; + + out_obj = acpi_evaluate_dsm_typed(lps0_device_handle, &lps0_dsm_guid, + 1, ACPI_LPS0_GET_DEVICE_CONSTRAINTS, + NULL, ACPI_TYPE_PACKAGE); + + if (!out_obj) + return; + + acpi_handle_debug(lps0_device_handle, "_DSM function 1 eval %s\n", + out_obj ? "successful" : "failed"); + + for (i = 0; i < out_obj->package.count; i++) { + union acpi_object *package = &out_obj->package.elements[i]; + struct lpi_device_info_amd info = { }; + + if (package->type == ACPI_TYPE_INTEGER) { + switch (i) { + case 0: + info.revision = package->integer.value; + break; + case 1: + info.count = package->integer.value; + break; + } + } else if (package->type == ACPI_TYPE_PACKAGE) { + lpi_constraints_table = kcalloc(package->package.count, + sizeof(*lpi_constraints_table), + GFP_KERNEL); + + if (!lpi_constraints_table) + goto free_acpi_buffer; + + acpi_handle_info(lps0_device_handle, + "LPI: constraints list begin:\n"); + + for (j = 0; j < package->package.count; ++j) { + union acpi_object *info_obj = &package->package.elements[j]; + struct lpi_device_constraint_amd dev_info = {}; + struct lpi_constraints *list; + acpi_status status; + + for (k = 0; k < info_obj->package.count; ++k) { + union acpi_object *obj = &info_obj->package.elements[k]; + union acpi_object *obj_new; + + list = &lpi_constraints_table[lpi_constraints_table_size]; + list->min_dstate = -1; + + obj_new = &obj[k]; + switch (k) { + case 0: + dev_info.enabled = obj->integer.value; + break; + case 1: + dev_info.name = obj->string.pointer; + break; + case 2: + dev_info.function_states = obj->integer.value; + break; + case 3: + dev_info.min_dstate = obj->integer.value; + break; + } + + if (!dev_info.enabled || !dev_info.name || + !dev_info.min_dstate) + continue; + + status = acpi_get_handle(NULL, dev_info.name, + &list->handle); + if (ACPI_FAILURE(status)) + continue; + + acpi_handle_info(lps0_device_handle, + "Name:%s\n", dev_info.name); + + list->min_dstate = dev_info.min_dstate; + + if (list->min_dstate < 0) { + acpi_handle_info(lps0_device_handle, + "Incomplete constraint defined\n"); + continue; + } + } + lpi_constraints_table_size++; + } + } + } + + acpi_handle_info(lps0_device_handle, "LPI: constraints list end\n"); + +free_acpi_buffer: + ACPI_FREE(out_obj); +} static void lpi_device_get_constraints(void) { @@ -883,13 +1004,22 @@ static void acpi_sleep_run_lps0_dsm(unsigned int func) if (!(lps0_dsm_func_mask & (1 << func))) return; - out_obj = acpi_evaluate_dsm(lps0_device_handle, &lps0_dsm_guid, 1, func, NULL); + out_obj = acpi_evaluate_dsm(lps0_device_handle, &lps0_dsm_guid, rev_id, func, NULL); ACPI_FREE(out_obj); acpi_handle_debug(lps0_device_handle, "_DSM function %u evaluation %s\n", func, out_obj ? "successful" : "failed"); } +static bool acpi_match_vendor_name(void) +{ +#ifdef CONFIG_X86 + if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) + return true; +#endif + return false; +} + static int lps0_device_attach(struct acpi_device *adev, const struct acpi_device_id *not_used) { @@ -901,9 +1031,17 @@ static int lps0_device_attach(struct acpi_device *adev, if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) return 0; - guid_parse(ACPI_LPS0_DSM_UUID, &lps0_dsm_guid); + if (acpi_match_vendor_name()) { + guid_parse(ACPI_LPS0_DSM_UUID_AMD, &lps0_dsm_guid); + out_obj = acpi_evaluate_dsm(adev->handle, &lps0_dsm_guid, 0, 0, NULL); + rev_id = 0; + } else { + guid_parse(ACPI_LPS0_DSM_UUID, &lps0_dsm_guid); + out_obj = acpi_evaluate_dsm(adev->handle, &lps0_dsm_guid, 1, 0, NULL); + rev_id = 1; + } + /* Check if the _DSM is present and as expected. */ - out_obj = acpi_evaluate_dsm(adev->handle, &lps0_dsm_guid, 1, 0, NULL); if (!out_obj || out_obj->type != ACPI_TYPE_BUFFER) { acpi_handle_debug(adev->handle, "_DSM function 0 evaluation failed\n"); @@ -919,7 +1057,10 @@ static int lps0_device_attach(struct acpi_device *adev, lps0_device_handle = adev->handle; - lpi_device_get_constraints(); + if (acpi_match_vendor_name()) + lpi_device_get_constraints_amd(); + else + lpi_device_get_constraints(); /* * Use suspend-to-idle by default if the default suspend mode was not @@ -974,9 +1115,12 @@ static int acpi_s2idle_prepare_late(void) if (pm_debug_messages_on) lpi_check_constraints(); - acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF); - acpi_sleep_run_lps0_dsm(ACPI_LPS0_ENTRY); - + if (acpi_match_vendor_name()) { + acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF_AMD); + } else { + acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_OFF); + acpi_sleep_run_lps0_dsm(ACPI_LPS0_ENTRY); + } return 0; } @@ -1051,8 +1195,12 @@ static void acpi_s2idle_restore_early(void) if (!lps0_device_handle || sleep_no_lps0) return; - acpi_sleep_run_lps0_dsm(ACPI_LPS0_EXIT); - acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_ON); + if (acpi_match_vendor_name()) { + acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_ON_AMD); + } else { + acpi_sleep_run_lps0_dsm(ACPI_LPS0_EXIT); + acpi_sleep_run_lps0_dsm(ACPI_LPS0_SCREEN_ON); + } } static void acpi_s2idle_restore(void) |