// SPDX-License-Identifier: MIT/* * 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/backlight.h>#include <linux/slab.h>#include <linux/xarray.h>#include <linux/power_supply.h>#include <linux/pm_runtime.h>#include <linux/suspend.h>#include <acpi/video.h>#include <acpi/actbl.h> #include "amdgpu.h"#include "amdgpu_pm.h"#include "amdgpu_display.h"#include "amd_acpi.h"#include "atom.h" /* Declare GUID for AMD _DSM method for XCCs */static const guid_t amd_xcc_dsm_guid = GUID_INIT(0x8267f5d5, 0xa556, 0x44f2, 0xb8, 0xb4, 0x45, 0x56, 0x2e, 0x8c, 0x5b, 0xec); #define AMD_XCC_HID_START 3000#define AMD_XCC_DSM_GET_NUM_FUNCS 0#define AMD_XCC_DSM_GET_SUPP_MODE 1#define AMD_XCC_DSM_GET_XCP_MODE 2#define AMD_XCC_DSM_GET_VF_XCC_MAPPING 4#define AMD_XCC_DSM_GET_TMR_INFO 5#define AMD_XCC_DSM_NUM_FUNCS 5 #define AMD_XCC_MAX_HID 24 struct xarray numa_info_xa; /* Encapsulates the XCD acpi object information */struct amdgpu_acpi_xcc_info { struct list_head list; struct amdgpu_numa_info *numa_info; uint8_t xcp_node; uint8_t phy_id; acpi_handle handle;}; struct amdgpu_acpi_dev_info { struct list_head list; struct list_head xcc_list; uint32_t sbdf; uint16_t supp_xcp_mode; uint16_t xcp_mode; uint16_t mem_mode; uint64_t tmr_base; uint64_t tmr_size;}; struct list_head amdgpu_acpi_dev_list; 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 get_uma_size; bool power_shift_control; bool set_uma_allocation_size;}; 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 * @min_size: minimum size of the expected output buffer in bytes * * 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, size_t min_size){ acpi_status status; union acpi_object *obj; 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); obj = (union acpi_object *)buffer.pointer; /* Fail if calling the method fails */ if (ACPI_FAILURE(status)) { DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n", acpi_format_exception(status)); kfree(obj); return NULL; } if (obj->type != ACPI_TYPE_BUFFER) { DRM_DEBUG_DRIVER("bad object returned from ATIF: %d\n", obj->type); kfree(obj); return NULL; } if (obj->buffer.length < sizeof(u16)) { DRM_DEBUG_DRIVER("ATIF buffer too small to hold size field: %u\n", obj->buffer.length); kfree(obj); return NULL; } if (obj->buffer.length < *(u16 *)obj->buffer.pointer) { DRM_DEBUG_DRIVER("ATIF buffer length mismatch: reported %u, actual %u\n", *(u16 *)obj->buffer.pointer, obj->buffer.length); kfree(obj); return NULL; } if (*(u16 *)obj->buffer.pointer < min_size) { DRM_DEBUG_DRIVER("ATIF buffer too small: expected %zu, got %u\n", min_size, *(u16 *)obj->buffer.pointer); kfree(obj); return NULL; } return obj;} /** * 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 noinline_for_stackint 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, sizeof(output)); if (!info) return -EIO; memset(&output, 0, sizeof(output)); size = min(sizeof(output), (size_t)*(u16 *)info->buffer.pointer); 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); 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 noinline_for_stackint 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, offsetof(struct atif_system_params, command_code)); if (!info) { err = -EIO; goto out; } memset(¶ms, 0, sizeof(params)); size = min(sizeof(params), (size_t)*(u16 *)info->buffer.pointer); 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 noinline_for_stackint 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, offsetof(struct atif_qbtc_output, data_points)); if (!info) { err = -EIO; goto out; } memset(&characteristics, 0, sizeof(characteristics)); size = min(sizeof(characteristics), (size_t)*(u16 *)info->buffer.pointer); 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; atif->backlight_caps.ac_level = characteristics.ac_level; atif->backlight_caps.dc_level = characteristics.dc_level; atif->backlight_caps.data_points = characteristics.number_of_points; memcpy(atif->backlight_caps.luminance_data, characteristics.data_points, sizeof(atif->backlight_caps.luminance_data));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, sizeof(*req)); if (!info) return -EIO; memset(req, 0, sizeof(*req)); size = min(sizeof(*req), (size_t)*(u16 *)info->buffer.pointer); memcpy(req, info->buffer.pointer, size); DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending); count = hweight32(req->pending); 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);Lines 1–500 of 1617. 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// SPDX-License-Identifier: MIT /* * 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/backlight.h> #include <linux/slab.h> #include <linux/xarray.h> #include <linux/power_supply.h> #include <linux/pm_runtime.h> #include <linux/suspend.h> #include <acpi/video.h> #include <acpi/actbl.h> #include "amdgpu.h" #include "amdgpu_pm.h" #include "amdgpu_display.h" #include "amd_acpi.h" #include "atom.h" /* Declare GUID for AMD _DSM method for XCCs */ static const guid_t amd_xcc_dsm_guid = GUID_INIT(0x8267f5d5, 0xa556, 0x44f2, 0xb8, 0xb4, 0x45, 0x56, 0x2e, 0x8c, 0x5b, 0xec); #define AMD_XCC_HID_START 3000 #define AMD_XCC_DSM_GET_NUM_FUNCS 0 #define AMD_XCC_DSM_GET_SUPP_MODE 1 #define AMD_XCC_DSM_GET_XCP_MODE 2 #define AMD_XCC_DSM_GET_VF_XCC_MAPPING 4 #define AMD_XCC_DSM_GET_TMR_INFO 5 #define AMD_XCC_DSM_NUM_FUNCS 5 #define AMD_XCC_MAX_HID 24 struct xarray numa_info_xa; /* Encapsulates the XCD acpi object information */ struct amdgpu_acpi_xcc_info { struct list_head list; struct amdgpu_numa_info *numa_info; uint8_t xcp_node; uint8_t phy_id; acpi_handle handle; }; struct amdgpu_acpi_dev_info { struct list_head list; struct list_head xcc_list; uint32_t sbdf; uint16_t supp_xcp_mode; uint16_t xcp_mode; uint16_t mem_mode; uint64_t tmr_base; uint64_t tmr_size; }; struct list_head amdgpu_acpi_dev_list; 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 get_uma_size; bool power_shift_control; bool set_uma_allocation_size; }; 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 * @min_size: minimum size of the expected output buffer in bytes * * 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, size_t min_size) { acpi_status status; union acpi_object *obj; 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); obj = (union acpi_object *)buffer.pointer; /* Fail if calling the method fails */ if (ACPI_FAILURE(status)) { DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n", acpi_format_exception(status)); kfree(obj); return NULL; } if (obj->type != ACPI_TYPE_BUFFER) { DRM_DEBUG_DRIVER("bad object returned from ATIF: %d\n", obj->type); kfree(obj); return NULL; } if (obj->buffer.length < sizeof(u16)) { DRM_DEBUG_DRIVER("ATIF buffer too small to hold size field: %u\n", obj->buffer.length); kfree(obj); return NULL; } if (obj->buffer.length < *(u16 *)obj->buffer.pointer) { DRM_DEBUG_DRIVER("ATIF buffer length mismatch: reported %u, actual %u\n", *(u16 *)obj->buffer.pointer, obj->buffer.length); kfree(obj); return NULL; } if (*(u16 *)obj->buffer.pointer < min_size) { DRM_DEBUG_DRIVER("ATIF buffer too small: expected %zu, got %u\n", min_size, *(u16 *)obj->buffer.pointer); kfree(obj); return NULL; } return obj; } /** * 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 noinline_for_stack 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, sizeof(output)); if (!info) return -EIO; memset(&output, 0, sizeof(output)); size = min(sizeof(output), (size_t)*(u16 *)info->buffer.pointer); 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); 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 noinline_for_stack 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, offsetof(struct atif_system_params, command_code)); if (!info) { err = -EIO; goto out; } memset(¶ms, 0, sizeof(params)); size = min(sizeof(params), (size_t)*(u16 *)info->buffer.pointer); 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 noinline_for_stack 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, offsetof(struct atif_qbtc_output, data_points)); if (!info) { err = -EIO; goto out; } memset(&characteristics, 0, sizeof(characteristics)); size = min(sizeof(characteristics), (size_t)*(u16 *)info->buffer.pointer); 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; atif->backlight_caps.ac_level = characteristics.ac_level; atif->backlight_caps.dc_level = characteristics.dc_level; atif->backlight_caps.data_points = characteristics.number_of_points; memcpy(atif->backlight_caps.luminance_data, characteristics.data_points, sizeof(atif->backlight_caps.luminance_data)); 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, sizeof(*req)); if (!info) return -EIO; memset(req, 0, sizeof(*req)); size = min(sizeof(*req), (size_t)*(u16 *)info->buffer.pointer); memcpy(req, info->buffer.pointer, size); DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending); count = hweight32(req->pending); 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);