| /* |
| * 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 <linux/pci.h> |
| #include <linux/acpi.h> |
| #include <linux/slab.h> |
| #include <linux/power_supply.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/suspend.h> |
| #include <acpi/video.h> |
| #include <acpi/actbl.h> |
| |
| #include <drm/drm_crtc_helper.h> |
| #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; |
| struct backlight_device *bd; |
| 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 (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); |
| } |
| } |
| |
| 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 (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; |
| } |
| } |
| } |
| } |
| } |
| 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 */ |