/* * Copyright 2012 Advanced Micro Devices, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * */ #include #include #include #include #include #include #include #include #include #include "amdgpu.h" #include "amdgpu_pm.h" #include "amdgpu_display.h" #include "amd_acpi.h" #include "atom.h" struct amdgpu_atif_notification_cfg { bool enabled; int command_code; }; struct amdgpu_atif_notifications { bool thermal_state; bool forced_power_state; bool system_power_state; bool brightness_change; bool dgpu_display_event; bool gpu_package_power_limit; }; struct amdgpu_atif_functions { bool system_params; bool sbios_requests; bool temperature_change; bool query_backlight_transfer_characteristics; bool ready_to_undock; bool external_gpu_information; }; struct amdgpu_atif { acpi_handle handle; struct amdgpu_atif_notifications notifications; struct amdgpu_atif_functions functions; struct amdgpu_atif_notification_cfg notification_cfg; #if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE) struct backlight_device *bd; #endif struct amdgpu_dm_backlight_caps backlight_caps; }; struct amdgpu_atcs_functions { bool get_ext_state; bool pcie_perf_req; bool pcie_dev_rdy; bool pcie_bus_width; bool power_shift_control; }; struct amdgpu_atcs { acpi_handle handle; struct amdgpu_atcs_functions functions; }; static struct amdgpu_acpi_priv { struct amdgpu_atif atif; struct amdgpu_atcs atcs; } amdgpu_acpi_priv; /* Call the ATIF method */ /** * amdgpu_atif_call - call an ATIF method * * @atif: atif structure * @function: the ATIF function to execute * @params: ATIF function params * * Executes the requested ATIF function (all asics). * Returns a pointer to the acpi output buffer. */ static union acpi_object *amdgpu_atif_call(struct amdgpu_atif *atif, int function, struct acpi_buffer *params) { acpi_status status; union acpi_object atif_arg_elements[2]; struct acpi_object_list atif_arg; struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; atif_arg.count = 2; atif_arg.pointer = &atif_arg_elements[0]; atif_arg_elements[0].type = ACPI_TYPE_INTEGER; atif_arg_elements[0].integer.value = function; if (params) { atif_arg_elements[1].type = ACPI_TYPE_BUFFER; atif_arg_elements[1].buffer.length = params->length; atif_arg_elements[1].buffer.pointer = params->pointer; } else { /* We need a second fake parameter */ atif_arg_elements[1].type = ACPI_TYPE_INTEGER; atif_arg_elements[1].integer.value = 0; } status = acpi_evaluate_object(atif->handle, NULL, &atif_arg, &buffer); /* Fail only if calling the method fails and ATIF is supported */ if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n", acpi_format_exception(status)); kfree(buffer.pointer); return NULL; } return buffer.pointer; } /** * amdgpu_atif_parse_notification - parse supported notifications * * @n: supported notifications struct * @mask: supported notifications mask from ATIF * * Use the supported notifications mask from ATIF function * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications * are supported (all asics). */ static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask) { n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED; n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED; n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED; n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED; n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED; n->gpu_package_power_limit = mask & ATIF_GPU_PACKAGE_POWER_LIMIT_REQUEST_SUPPORTED; } /** * amdgpu_atif_parse_functions - parse supported functions * * @f: supported functions struct * @mask: supported functions mask from ATIF * * Use the supported functions mask from ATIF function * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions * are supported (all asics). */ static void amdgpu_atif_parse_functions(struct amdgpu_atif_functions *f, u32 mask) { f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED; f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED; f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED; f->query_backlight_transfer_characteristics = mask & ATIF_QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS_SUPPORTED; f->ready_to_undock = mask & ATIF_READY_TO_UNDOCK_NOTIFICATION_SUPPORTED; f->external_gpu_information = mask & ATIF_GET_EXTERNAL_GPU_INFORMATION_SUPPORTED; } /** * amdgpu_atif_verify_interface - verify ATIF * * @atif: amdgpu atif struct * * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function * to initialize ATIF and determine what features are supported * (all asics). * returns 0 on success, error on failure. */ static int amdgpu_atif_verify_interface(struct amdgpu_atif *atif) { union acpi_object *info; struct atif_verify_interface output; size_t size; int err = 0; info = amdgpu_atif_call(atif, ATIF_FUNCTION_VERIFY_INTERFACE, NULL); if (!info) return -EIO; memset(&output, 0, sizeof(output)); size = *(u16 *) info->buffer.pointer; if (size < 12) { DRM_INFO("ATIF buffer is too small: %zu\n", size); err = -EINVAL; goto out; } size = min(sizeof(output), size); memcpy(&output, info->buffer.pointer, size); /* TODO: check version? */ DRM_DEBUG_DRIVER("ATIF version %u\n", output.version); amdgpu_atif_parse_notification(&atif->notifications, output.notification_mask); amdgpu_atif_parse_functions(&atif->functions, output.function_bits); out: kfree(info); return err; } /** * amdgpu_atif_get_notification_params - determine notify configuration * * @atif: acpi handle * * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function * to determine if a notifier is used and if so which one * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n) * where n is specified in the result if a notifier is used. * Returns 0 on success, error on failure. */ static int amdgpu_atif_get_notification_params(struct amdgpu_atif *atif) { union acpi_object *info; struct amdgpu_atif_notification_cfg *n = &atif->notification_cfg; struct atif_system_params params; size_t size; int err = 0; info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS, NULL); if (!info) { err = -EIO; goto out; } size = *(u16 *) info->buffer.pointer; if (size < 10) { err = -EINVAL; goto out; } memset(¶ms, 0, sizeof(params)); size = min(sizeof(params), size); memcpy(¶ms, info->buffer.pointer, size); DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n", params.flags, params.valid_mask); params.flags = params.flags & params.valid_mask; if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) { n->enabled = false; n->command_code = 0; } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) { n->enabled = true; n->command_code = 0x81; } else { if (size < 11) { err = -EINVAL; goto out; } n->enabled = true; n->command_code = params.command_code; } out: DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n", (n->enabled ? "enabled" : "disabled"), n->command_code); kfree(info); return err; } /** * amdgpu_atif_query_backlight_caps - get min and max backlight input signal * * @atif: acpi handle * * Execute the QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS ATIF function * to determine the acceptable range of backlight values * * Backlight_caps.caps_valid will be set to true if the query is successful * * The input signals are in range 0-255 * * This function assumes the display with backlight is the first LCD * * Returns 0 on success, error on failure. */ static int amdgpu_atif_query_backlight_caps(struct amdgpu_atif *atif) { union acpi_object *info; struct atif_qbtc_output characteristics; struct atif_qbtc_arguments arguments; struct acpi_buffer params; size_t size; int err = 0; arguments.size = sizeof(arguments); arguments.requested_display = ATIF_QBTC_REQUEST_LCD1; params.length = sizeof(arguments); params.pointer = (void *)&arguments; info = amdgpu_atif_call(atif, ATIF_FUNCTION_QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS, ¶ms); if (!info) { err = -EIO; goto out; } size = *(u16 *) info->buffer.pointer; if (size < 10) { err = -EINVAL; goto out; } memset(&characteristics, 0, sizeof(characteristics)); size = min(sizeof(characteristics), size); memcpy(&characteristics, info->buffer.pointer, size); atif->backlight_caps.caps_valid = true; atif->backlight_caps.min_input_signal = characteristics.min_input_signal; atif->backlight_caps.max_input_signal = characteristics.max_input_signal; out: kfree(info); return err; } /** * amdgpu_atif_get_sbios_requests - get requested sbios event * * @atif: acpi handle * @req: atif sbios request struct * * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function * to determine what requests the sbios is making to the driver * (all asics). * Returns 0 on success, error on failure. */ static int amdgpu_atif_get_sbios_requests(struct amdgpu_atif *atif, struct atif_sbios_requests *req) { union acpi_object *info; size_t size; int count = 0; info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS, NULL); if (!info) return -EIO; size = *(u16 *)info->buffer.pointer; if (size < 0xd) { count = -EINVAL; goto out; } memset(req, 0, sizeof(*req)); size = min(sizeof(*req), size); memcpy(req, info->buffer.pointer, size); DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending); count = hweight32(req->pending); out: kfree(info); return count; } /** * amdgpu_atif_handler - handle ATIF notify requests * * @adev: amdgpu_device pointer * @event: atif sbios request struct * * Checks the acpi event and if it matches an atif event, * handles it. * * Returns: * NOTIFY_BAD or NOTIFY_DONE, depending on the event. */ static int amdgpu_atif_handler(struct amdgpu_device *adev, struct acpi_bus_event *event) { struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif; int count; DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n", event->device_class, event->type); if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) return NOTIFY_DONE; /* Is this actually our event? */ if (!atif->notification_cfg.enabled || event->type != atif->notification_cfg.command_code) { /* These events will generate keypresses otherwise */ if (event->type == ACPI_VIDEO_NOTIFY_PROBE) return NOTIFY_BAD; else return NOTIFY_DONE; } if (atif->functions.sbios_requests) { struct atif_sbios_requests req; /* Check pending SBIOS requests */ count = amdgpu_atif_get_sbios_requests(atif, &req); if (count <= 0) return NOTIFY_BAD; DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count); if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) { #if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE) if (atif->bd) { DRM_DEBUG_DRIVER("Changing brightness to %d\n", req.backlight_level); /* * XXX backlight_device_set_brightness() is * hardwired to post BACKLIGHT_UPDATE_SYSFS. * It probably should accept 'reason' parameter. */ backlight_device_set_brightness(atif->bd, req.backlight_level); } #endif } if (req.pending & ATIF_DGPU_DISPLAY_EVENT) { if (adev->flags & AMD_IS_PX) { pm_runtime_get_sync(adev_to_drm(adev)->dev); /* Just fire off a uevent and let userspace tell us what to do */ drm_helper_hpd_irq_event(adev_to_drm(adev)); pm_runtime_mark_last_busy(adev_to_drm(adev)->dev); pm_runtime_put_autosuspend(adev_to_drm(adev)->dev); } } /* TODO: check other events */ } /* We've handled the event, stop the notifier chain. The ACPI interface * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to * userspace if the event was generated only to signal a SBIOS * request. */ return NOTIFY_BAD; } /* Call the ATCS method */ /** * amdgpu_atcs_call - call an ATCS method * * @atcs: atcs structure * @function: the ATCS function to execute * @params: ATCS function params * * Executes the requested ATCS function (all asics). * Returns a pointer to the acpi output buffer. */ static union acpi_object *amdgpu_atcs_call(struct amdgpu_atcs *atcs, int function, struct acpi_buffer *params) { acpi_status status; union acpi_object atcs_arg_elements[2]; struct acpi_object_list atcs_arg; struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; atcs_arg.count = 2; atcs_arg.pointer = &atcs_arg_elements[0]; atcs_arg_elements[0].type = ACPI_TYPE_INTEGER; atcs_arg_elements[0].integer.value = function; if (params) { atcs_arg_elements[1].type = ACPI_TYPE_BUFFER; atcs_arg_elements[1].buffer.length = params->length; atcs_arg_elements[1].buffer.pointer = params->pointer; } else { /* We need a second fake parameter */ atcs_arg_elements[1].type = ACPI_TYPE_INTEGER; atcs_arg_elements[1].integer.value = 0; } status = acpi_evaluate_object(atcs->handle, NULL, &atcs_arg, &buffer); /* Fail only if calling the method fails and ATIF is supported */ if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n", acpi_format_exception(status)); kfree(buffer.pointer); return NULL; } return buffer.pointer; } /** * amdgpu_atcs_parse_functions - parse supported functions * * @f: supported functions struct * @mask: supported functions mask from ATCS * * Use the supported functions mask from ATCS function * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions * are supported (all asics). */ static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask) { f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED; f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED; f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED; f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED; f->power_shift_control = mask & ATCS_SET_POWER_SHIFT_CONTROL_SUPPORTED; } /** * amdgpu_atcs_verify_interface - verify ATCS * * @atcs: amdgpu atcs struct * * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function * to initialize ATCS and determine what features are supported * (all asics). * returns 0 on success, error on failure. */ static int amdgpu_atcs_verify_interface(struct amdgpu_atcs *atcs) { union acpi_object *info; struct atcs_verify_interface output; size_t size; int err = 0; info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_VERIFY_INTERFACE, NULL); if (!info) return -EIO; memset(&output, 0, sizeof(output)); size = *(u16 *) info->buffer.pointer; if (size < 8) { DRM_INFO("ATCS buffer is too small: %zu\n", size); err = -EINVAL; goto out; } size = min(sizeof(output), size); memcpy(&output, info->buffer.pointer, size); /* TODO: check version? */ DRM_DEBUG_DRIVER("ATCS version %u\n", output.version); amdgpu_atcs_parse_functions(&atcs->functions, output.function_bits); out: kfree(info); return err; } /** * amdgpu_acpi_is_pcie_performance_request_supported * * @adev: amdgpu_device pointer * * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods * are supported (all asics). * returns true if supported, false if not. */ bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev) { struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs; if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy) return true; return false; } /** * amdgpu_acpi_is_power_shift_control_supported * * Check if the ATCS power shift control method * is supported. * returns true if supported, false if not. */ bool amdgpu_acpi_is_power_shift_control_supported(void) { return amdgpu_acpi_priv.atcs.functions.power_shift_control; } /** * amdgpu_acpi_pcie_notify_device_ready * * @adev: amdgpu_device pointer * * Executes the PCIE_DEVICE_READY_NOTIFICATION method * (all asics). * returns 0 on success, error on failure. */ int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev) { union acpi_object *info; struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs; if (!atcs->functions.pcie_dev_rdy) return -EINVAL; info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL); if (!info) return -EIO; kfree(info); return 0; } /** * amdgpu_acpi_pcie_performance_request * * @adev: amdgpu_device pointer * @perf_req: requested perf level (pcie gen speed) * @advertise: set advertise caps flag if set * * Executes the PCIE_PERFORMANCE_REQUEST method to * change the pcie gen speed (all asics). * returns 0 on success, error on failure. */ int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev, u8 perf_req, bool advertise) { union acpi_object *info; struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs; struct atcs_pref_req_input atcs_input; struct atcs_pref_req_output atcs_output; struct acpi_buffer params; size_t size; u32 retry = 3; if (amdgpu_acpi_pcie_notify_device_ready(adev)) return -EINVAL; if (!atcs->functions.pcie_perf_req) return -EINVAL; atcs_input.size = sizeof(struct atcs_pref_req_input); /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */ atcs_input.client_id = adev->pdev->devfn | (adev->pdev->bus->number << 8); atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK; atcs_input.flags = ATCS_WAIT_FOR_COMPLETION; if (advertise) atcs_input.flags |= ATCS_ADVERTISE_CAPS; atcs_input.req_type = ATCS_PCIE_LINK_SPEED; atcs_input.perf_req = perf_req; params.length = sizeof(struct atcs_pref_req_input); params.pointer = &atcs_input; while (retry--) { info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms); if (!info) return -EIO; memset(&atcs_output, 0, sizeof(atcs_output)); size = *(u16 *) info->buffer.pointer; if (size < 3) { DRM_INFO("ATCS buffer is too small: %zu\n", size); kfree(info); return -EINVAL; } size = min(sizeof(atcs_output), size); memcpy(&atcs_output, info->buffer.pointer, size); kfree(info); switch (atcs_output.ret_val) { case ATCS_REQUEST_REFUSED: default: return -EINVAL; case ATCS_REQUEST_COMPLETE: return 0; case ATCS_REQUEST_IN_PROGRESS: udelay(10); break; } } return 0; } /** * amdgpu_acpi_power_shift_control * * @adev: amdgpu_device pointer * @dev_state: device acpi state * @drv_state: driver state * * Executes the POWER_SHIFT_CONTROL method to * communicate current dGPU device state and * driver state to APU/SBIOS. * returns 0 on success, error on failure. */ int amdgpu_acpi_power_shift_control(struct amdgpu_device *adev, u8 dev_state, bool drv_state) { union acpi_object *info; struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs; struct atcs_pwr_shift_input atcs_input; struct acpi_buffer params; if (!amdgpu_acpi_is_power_shift_control_supported()) return -EINVAL; atcs_input.size = sizeof(struct atcs_pwr_shift_input); /* dGPU id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */ atcs_input.dgpu_id = adev->pdev->devfn | (adev->pdev->bus->number << 8); atcs_input.dev_acpi_state = dev_state; atcs_input.drv_state = drv_state; params.length = sizeof(struct atcs_pwr_shift_input); params.pointer = &atcs_input; info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_POWER_SHIFT_CONTROL, ¶ms); if (!info) { DRM_ERROR("ATCS PSC update failed\n"); return -EIO; } return 0; } /** * amdgpu_acpi_smart_shift_update - update dGPU device state to SBIOS * * @dev: drm_device pointer * @ss_state: current smart shift event * * returns 0 on success, * otherwise return error number. */ int amdgpu_acpi_smart_shift_update(struct drm_device *dev, enum amdgpu_ss ss_state) { struct amdgpu_device *adev = drm_to_adev(dev); int r; if (!amdgpu_device_supports_smart_shift(dev)) return 0; switch (ss_state) { /* SBIOS trigger “stop”, “enable” and “start” at D0, Driver Operational. * SBIOS trigger “stop” at D3, Driver Not Operational. * SBIOS trigger “stop” and “disable” at D0, Driver NOT operational. */ case AMDGPU_SS_DRV_LOAD: r = amdgpu_acpi_power_shift_control(adev, AMDGPU_ATCS_PSC_DEV_STATE_D0, AMDGPU_ATCS_PSC_DRV_STATE_OPR); break; case AMDGPU_SS_DEV_D0: r = amdgpu_acpi_power_shift_control(adev, AMDGPU_ATCS_PSC_DEV_STATE_D0, AMDGPU_ATCS_PSC_DRV_STATE_OPR); break; case AMDGPU_SS_DEV_D3: r = amdgpu_acpi_power_shift_control(adev, AMDGPU_ATCS_PSC_DEV_STATE_D3_HOT, AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR); break; case AMDGPU_SS_DRV_UNLOAD: r = amdgpu_acpi_power_shift_control(adev, AMDGPU_ATCS_PSC_DEV_STATE_D0, AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR); break; default: return -EINVAL; } return r; } /** * amdgpu_acpi_event - handle notify events * * @nb: notifier block * @val: val * @data: acpi event * * Calls relevant amdgpu functions in response to various * acpi events. * Returns NOTIFY code */ static int amdgpu_acpi_event(struct notifier_block *nb, unsigned long val, void *data) { struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb); struct acpi_bus_event *entry = (struct acpi_bus_event *)data; if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) { if (power_supply_is_system_supplied() > 0) DRM_DEBUG_DRIVER("pm: AC\n"); else DRM_DEBUG_DRIVER("pm: DC\n"); amdgpu_pm_acpi_event_handler(adev); } /* Check for pending SBIOS requests */ return amdgpu_atif_handler(adev, entry); } /* Call all ACPI methods here */ /** * amdgpu_acpi_init - init driver acpi support * * @adev: amdgpu_device pointer * * Verifies the AMD ACPI interfaces and registers with the acpi * notifier chain (all asics). * Returns 0 on success, error on failure. */ int amdgpu_acpi_init(struct amdgpu_device *adev) { struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif; #if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE) if (atif->notifications.brightness_change) { if (amdgpu_device_has_dc_support(adev)) { #if defined(CONFIG_DRM_AMD_DC) struct amdgpu_display_manager *dm = &adev->dm; if (dm->backlight_dev[0]) atif->bd = dm->backlight_dev[0]; #endif } else { struct drm_encoder *tmp; /* Find the encoder controlling the brightness */ list_for_each_entry(tmp, &adev_to_drm(adev)->mode_config.encoder_list, head) { struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp); if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) && enc->enc_priv) { struct amdgpu_encoder_atom_dig *dig = enc->enc_priv; if (dig->bl_dev) { atif->bd = dig->bl_dev; break; } } } } } #endif adev->acpi_nb.notifier_call = amdgpu_acpi_event; register_acpi_notifier(&adev->acpi_nb); return 0; } void amdgpu_acpi_get_backlight_caps(struct amdgpu_dm_backlight_caps *caps) { struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif; caps->caps_valid = atif->backlight_caps.caps_valid; caps->min_input_signal = atif->backlight_caps.min_input_signal; caps->max_input_signal = atif->backlight_caps.max_input_signal; } /** * amdgpu_acpi_fini - tear down driver acpi support * * @adev: amdgpu_device pointer * * Unregisters with the acpi notifier chain (all asics). */ void amdgpu_acpi_fini(struct amdgpu_device *adev) { unregister_acpi_notifier(&adev->acpi_nb); } /** * amdgpu_atif_pci_probe_handle - look up the ATIF handle * * @pdev: pci device * * Look up the ATIF handles (all asics). * Returns true if the handle is found, false if not. */ static bool amdgpu_atif_pci_probe_handle(struct pci_dev *pdev) { char acpi_method_name[255] = { 0 }; struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name}; acpi_handle dhandle, atif_handle; acpi_status status; int ret; dhandle = ACPI_HANDLE(&pdev->dev); if (!dhandle) return false; status = acpi_get_handle(dhandle, "ATIF", &atif_handle); if (ACPI_FAILURE(status)) { return false; } amdgpu_acpi_priv.atif.handle = atif_handle; acpi_get_name(amdgpu_acpi_priv.atif.handle, ACPI_FULL_PATHNAME, &buffer); DRM_DEBUG_DRIVER("Found ATIF handle %s\n", acpi_method_name); ret = amdgpu_atif_verify_interface(&amdgpu_acpi_priv.atif); if (ret) { amdgpu_acpi_priv.atif.handle = 0; return false; } return true; } /** * amdgpu_atcs_pci_probe_handle - look up the ATCS handle * * @pdev: pci device * * Look up the ATCS handles (all asics). * Returns true if the handle is found, false if not. */ static bool amdgpu_atcs_pci_probe_handle(struct pci_dev *pdev) { char acpi_method_name[255] = { 0 }; struct acpi_buffer buffer = { sizeof(acpi_method_name), acpi_method_name }; acpi_handle dhandle, atcs_handle; acpi_status status; int ret; dhandle = ACPI_HANDLE(&pdev->dev); if (!dhandle) return false; status = acpi_get_handle(dhandle, "ATCS", &atcs_handle); if (ACPI_FAILURE(status)) { return false; } amdgpu_acpi_priv.atcs.handle = atcs_handle; acpi_get_name(amdgpu_acpi_priv.atcs.handle, ACPI_FULL_PATHNAME, &buffer); DRM_DEBUG_DRIVER("Found ATCS handle %s\n", acpi_method_name); ret = amdgpu_atcs_verify_interface(&amdgpu_acpi_priv.atcs); if (ret) { amdgpu_acpi_priv.atcs.handle = 0; return false; } return true; } /* * amdgpu_acpi_detect - detect ACPI ATIF/ATCS methods * * Check if we have the ATIF/ATCS methods and populate * the structures in the driver. */ void amdgpu_acpi_detect(void) { struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif; struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs; struct pci_dev *pdev = NULL; int ret; while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) { if (!atif->handle) amdgpu_atif_pci_probe_handle(pdev); if (!atcs->handle) amdgpu_atcs_pci_probe_handle(pdev); } while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) { if (!atif->handle) amdgpu_atif_pci_probe_handle(pdev); if (!atcs->handle) amdgpu_atcs_pci_probe_handle(pdev); } if (atif->functions.sbios_requests && !atif->functions.system_params) { /* XXX check this workraround, if sbios request function is * present we have to see how it's configured in the system * params */ atif->functions.system_params = true; } if (atif->functions.system_params) { ret = amdgpu_atif_get_notification_params(atif); if (ret) { DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n", ret); /* Disable notification */ atif->notification_cfg.enabled = false; } } if (atif->functions.query_backlight_transfer_characteristics) { ret = amdgpu_atif_query_backlight_caps(atif); if (ret) { DRM_DEBUG_DRIVER("Call to QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS failed: %d\n", ret); atif->backlight_caps.caps_valid = false; } } else { atif->backlight_caps.caps_valid = false; } } #if IS_ENABLED(CONFIG_SUSPEND) /** * amdgpu_acpi_is_s3_active * * @adev: amdgpu_device_pointer * * returns true if supported, false if not. */ bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev) { return !(adev->flags & AMD_IS_APU) || (pm_suspend_target_state == PM_SUSPEND_MEM); } /** * amdgpu_acpi_should_gpu_reset * * @adev: amdgpu_device_pointer * * returns true if should reset GPU, false if not */ bool amdgpu_acpi_should_gpu_reset(struct amdgpu_device *adev) { if (adev->flags & AMD_IS_APU) return false; if (amdgpu_sriov_vf(adev)) return false; return pm_suspend_target_state != PM_SUSPEND_TO_IDLE; } /** * amdgpu_acpi_is_s0ix_active * * @adev: amdgpu_device_pointer * * returns true if supported, false if not. */ bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev) { if (!(adev->flags & AMD_IS_APU) || (pm_suspend_target_state != PM_SUSPEND_TO_IDLE)) return false; if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) { dev_warn_once(adev->dev, "Power consumption will be higher as BIOS has not been configured for suspend-to-idle.\n" "To use suspend-to-idle change the sleep mode in BIOS setup.\n"); return false; } #if !IS_ENABLED(CONFIG_AMD_PMC) dev_warn_once(adev->dev, "Power consumption will be higher as the kernel has not been compiled with CONFIG_AMD_PMC.\n"); return false; #else return true; #endif /* CONFIG_AMD_PMC */ } #endif /* CONFIG_SUSPEND */