1d38ceaf9SAlex Deucher /* 2d38ceaf9SAlex Deucher * Copyright 2012 Advanced Micro Devices, Inc. 3d38ceaf9SAlex Deucher * 4d38ceaf9SAlex Deucher * Permission is hereby granted, free of charge, to any person obtaining a 5d38ceaf9SAlex Deucher * copy of this software and associated documentation files (the "Software"), 6d38ceaf9SAlex Deucher * to deal in the Software without restriction, including without limitation 7d38ceaf9SAlex Deucher * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8d38ceaf9SAlex Deucher * and/or sell copies of the Software, and to permit persons to whom the 9d38ceaf9SAlex Deucher * Software is furnished to do so, subject to the following conditions: 10d38ceaf9SAlex Deucher * 11d38ceaf9SAlex Deucher * The above copyright notice and this permission notice shall be included in 12d38ceaf9SAlex Deucher * all copies or substantial portions of the Software. 13d38ceaf9SAlex Deucher * 14d38ceaf9SAlex Deucher * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15d38ceaf9SAlex Deucher * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16d38ceaf9SAlex Deucher * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17d38ceaf9SAlex Deucher * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18d38ceaf9SAlex Deucher * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19d38ceaf9SAlex Deucher * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20d38ceaf9SAlex Deucher * OTHER DEALINGS IN THE SOFTWARE. 21d38ceaf9SAlex Deucher * 22d38ceaf9SAlex Deucher */ 23d38ceaf9SAlex Deucher 24d38ceaf9SAlex Deucher #include <linux/pci.h> 25d38ceaf9SAlex Deucher #include <linux/acpi.h> 26d38ceaf9SAlex Deucher #include <linux/slab.h> 27d38ceaf9SAlex Deucher #include <linux/power_supply.h> 281b0f568dSAlex Deucher #include <linux/pm_runtime.h> 29d38ceaf9SAlex Deucher #include <acpi/video.h> 30fdf2f6c5SSam Ravnborg 31d38ceaf9SAlex Deucher #include <drm/drm_crtc_helper.h> 32d38ceaf9SAlex Deucher #include "amdgpu.h" 3398c65108SJean Delvare #include "amdgpu_pm.h" 345df58525SHuang Rui #include "amdgpu_display.h" 3566dc0dddSRex Zhu #include "amd_acpi.h" 36d38ceaf9SAlex Deucher #include "atom.h" 37d38ceaf9SAlex Deucher 38102c16a0SLyude Paul struct amdgpu_atif_notification_cfg { 39102c16a0SLyude Paul bool enabled; 40102c16a0SLyude Paul int command_code; 41102c16a0SLyude Paul }; 42102c16a0SLyude Paul 43102c16a0SLyude Paul struct amdgpu_atif_notifications { 44102c16a0SLyude Paul bool thermal_state; 45102c16a0SLyude Paul bool forced_power_state; 46102c16a0SLyude Paul bool system_power_state; 47102c16a0SLyude Paul bool brightness_change; 48102c16a0SLyude Paul bool dgpu_display_event; 497349a3afSDavid Francis bool gpu_package_power_limit; 50102c16a0SLyude Paul }; 51102c16a0SLyude Paul 52102c16a0SLyude Paul struct amdgpu_atif_functions { 53102c16a0SLyude Paul bool system_params; 54102c16a0SLyude Paul bool sbios_requests; 55102c16a0SLyude Paul bool temperature_change; 567349a3afSDavid Francis bool query_backlight_transfer_characteristics; 577349a3afSDavid Francis bool ready_to_undock; 587349a3afSDavid Francis bool external_gpu_information; 59102c16a0SLyude Paul }; 60102c16a0SLyude Paul 61102c16a0SLyude Paul struct amdgpu_atif { 62280cf1a9SLyude Paul acpi_handle handle; 63280cf1a9SLyude Paul 64102c16a0SLyude Paul struct amdgpu_atif_notifications notifications; 65102c16a0SLyude Paul struct amdgpu_atif_functions functions; 66102c16a0SLyude Paul struct amdgpu_atif_notification_cfg notification_cfg; 6797d798b2SAlex Deucher #if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE) 6897d798b2SAlex Deucher struct backlight_device *bd; 6997d798b2SAlex Deucher #endif 70206bbafeSDavid Francis struct amdgpu_dm_backlight_caps backlight_caps; 71102c16a0SLyude Paul }; 72102c16a0SLyude Paul 73d38ceaf9SAlex Deucher /* Call the ATIF method 74d38ceaf9SAlex Deucher */ 75d38ceaf9SAlex Deucher /** 76d38ceaf9SAlex Deucher * amdgpu_atif_call - call an ATIF method 77d38ceaf9SAlex Deucher * 78d38ceaf9SAlex Deucher * @handle: acpi handle 79d38ceaf9SAlex Deucher * @function: the ATIF function to execute 80d38ceaf9SAlex Deucher * @params: ATIF function params 81d38ceaf9SAlex Deucher * 82d38ceaf9SAlex Deucher * Executes the requested ATIF function (all asics). 83d38ceaf9SAlex Deucher * Returns a pointer to the acpi output buffer. 84d38ceaf9SAlex Deucher */ 85280cf1a9SLyude Paul static union acpi_object *amdgpu_atif_call(struct amdgpu_atif *atif, 86280cf1a9SLyude Paul int function, 87d38ceaf9SAlex Deucher struct acpi_buffer *params) 88d38ceaf9SAlex Deucher { 89d38ceaf9SAlex Deucher acpi_status status; 90d38ceaf9SAlex Deucher union acpi_object atif_arg_elements[2]; 91d38ceaf9SAlex Deucher struct acpi_object_list atif_arg; 92d38ceaf9SAlex Deucher struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 93d38ceaf9SAlex Deucher 94d38ceaf9SAlex Deucher atif_arg.count = 2; 95d38ceaf9SAlex Deucher atif_arg.pointer = &atif_arg_elements[0]; 96d38ceaf9SAlex Deucher 97d38ceaf9SAlex Deucher atif_arg_elements[0].type = ACPI_TYPE_INTEGER; 98d38ceaf9SAlex Deucher atif_arg_elements[0].integer.value = function; 99d38ceaf9SAlex Deucher 100d38ceaf9SAlex Deucher if (params) { 101d38ceaf9SAlex Deucher atif_arg_elements[1].type = ACPI_TYPE_BUFFER; 102d38ceaf9SAlex Deucher atif_arg_elements[1].buffer.length = params->length; 103d38ceaf9SAlex Deucher atif_arg_elements[1].buffer.pointer = params->pointer; 104d38ceaf9SAlex Deucher } else { 105d38ceaf9SAlex Deucher /* We need a second fake parameter */ 106d38ceaf9SAlex Deucher atif_arg_elements[1].type = ACPI_TYPE_INTEGER; 107d38ceaf9SAlex Deucher atif_arg_elements[1].integer.value = 0; 108d38ceaf9SAlex Deucher } 109d38ceaf9SAlex Deucher 110280cf1a9SLyude Paul status = acpi_evaluate_object(atif->handle, NULL, &atif_arg, 111280cf1a9SLyude Paul &buffer); 112d38ceaf9SAlex Deucher 113d38ceaf9SAlex Deucher /* Fail only if calling the method fails and ATIF is supported */ 114d38ceaf9SAlex Deucher if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 115d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n", 116d38ceaf9SAlex Deucher acpi_format_exception(status)); 117d38ceaf9SAlex Deucher kfree(buffer.pointer); 118d38ceaf9SAlex Deucher return NULL; 119d38ceaf9SAlex Deucher } 120d38ceaf9SAlex Deucher 121d38ceaf9SAlex Deucher return buffer.pointer; 122d38ceaf9SAlex Deucher } 123d38ceaf9SAlex Deucher 124d38ceaf9SAlex Deucher /** 125d38ceaf9SAlex Deucher * amdgpu_atif_parse_notification - parse supported notifications 126d38ceaf9SAlex Deucher * 127d38ceaf9SAlex Deucher * @n: supported notifications struct 128d38ceaf9SAlex Deucher * @mask: supported notifications mask from ATIF 129d38ceaf9SAlex Deucher * 130d38ceaf9SAlex Deucher * Use the supported notifications mask from ATIF function 131d38ceaf9SAlex Deucher * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications 132d38ceaf9SAlex Deucher * are supported (all asics). 133d38ceaf9SAlex Deucher */ 134d38ceaf9SAlex Deucher static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask) 135d38ceaf9SAlex Deucher { 136d38ceaf9SAlex Deucher n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED; 137d38ceaf9SAlex Deucher n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED; 138d38ceaf9SAlex Deucher n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED; 139d38ceaf9SAlex Deucher n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED; 140d38ceaf9SAlex Deucher n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED; 1417349a3afSDavid Francis n->gpu_package_power_limit = mask & ATIF_GPU_PACKAGE_POWER_LIMIT_REQUEST_SUPPORTED; 142d38ceaf9SAlex Deucher } 143d38ceaf9SAlex Deucher 144d38ceaf9SAlex Deucher /** 145d38ceaf9SAlex Deucher * amdgpu_atif_parse_functions - parse supported functions 146d38ceaf9SAlex Deucher * 147d38ceaf9SAlex Deucher * @f: supported functions struct 148d38ceaf9SAlex Deucher * @mask: supported functions mask from ATIF 149d38ceaf9SAlex Deucher * 150d38ceaf9SAlex Deucher * Use the supported functions mask from ATIF function 151d38ceaf9SAlex Deucher * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions 152d38ceaf9SAlex Deucher * are supported (all asics). 153d38ceaf9SAlex Deucher */ 154d38ceaf9SAlex Deucher static void amdgpu_atif_parse_functions(struct amdgpu_atif_functions *f, u32 mask) 155d38ceaf9SAlex Deucher { 156d38ceaf9SAlex Deucher f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED; 157d38ceaf9SAlex Deucher f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED; 158d38ceaf9SAlex Deucher f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED; 1597349a3afSDavid Francis f->query_backlight_transfer_characteristics = 1607349a3afSDavid Francis mask & ATIF_QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS_SUPPORTED; 1617349a3afSDavid Francis f->ready_to_undock = mask & ATIF_READY_TO_UNDOCK_NOTIFICATION_SUPPORTED; 1627349a3afSDavid Francis f->external_gpu_information = mask & ATIF_GET_EXTERNAL_GPU_INFORMATION_SUPPORTED; 163d38ceaf9SAlex Deucher } 164d38ceaf9SAlex Deucher 165d38ceaf9SAlex Deucher /** 166d38ceaf9SAlex Deucher * amdgpu_atif_verify_interface - verify ATIF 167d38ceaf9SAlex Deucher * 168d38ceaf9SAlex Deucher * @handle: acpi handle 169d38ceaf9SAlex Deucher * @atif: amdgpu atif struct 170d38ceaf9SAlex Deucher * 171d38ceaf9SAlex Deucher * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function 172d38ceaf9SAlex Deucher * to initialize ATIF and determine what features are supported 173d38ceaf9SAlex Deucher * (all asics). 174d38ceaf9SAlex Deucher * returns 0 on success, error on failure. 175d38ceaf9SAlex Deucher */ 176280cf1a9SLyude Paul static int amdgpu_atif_verify_interface(struct amdgpu_atif *atif) 177d38ceaf9SAlex Deucher { 178d38ceaf9SAlex Deucher union acpi_object *info; 179d38ceaf9SAlex Deucher struct atif_verify_interface output; 180d38ceaf9SAlex Deucher size_t size; 181d38ceaf9SAlex Deucher int err = 0; 182d38ceaf9SAlex Deucher 183280cf1a9SLyude Paul info = amdgpu_atif_call(atif, ATIF_FUNCTION_VERIFY_INTERFACE, NULL); 184d38ceaf9SAlex Deucher if (!info) 185d38ceaf9SAlex Deucher return -EIO; 186d38ceaf9SAlex Deucher 187d38ceaf9SAlex Deucher memset(&output, 0, sizeof(output)); 188d38ceaf9SAlex Deucher 189d38ceaf9SAlex Deucher size = *(u16 *) info->buffer.pointer; 190d38ceaf9SAlex Deucher if (size < 12) { 191d38ceaf9SAlex Deucher DRM_INFO("ATIF buffer is too small: %zu\n", size); 192d38ceaf9SAlex Deucher err = -EINVAL; 193d38ceaf9SAlex Deucher goto out; 194d38ceaf9SAlex Deucher } 195d38ceaf9SAlex Deucher size = min(sizeof(output), size); 196d38ceaf9SAlex Deucher 197d38ceaf9SAlex Deucher memcpy(&output, info->buffer.pointer, size); 198d38ceaf9SAlex Deucher 199d38ceaf9SAlex Deucher /* TODO: check version? */ 200d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("ATIF version %u\n", output.version); 201d38ceaf9SAlex Deucher 202d38ceaf9SAlex Deucher amdgpu_atif_parse_notification(&atif->notifications, output.notification_mask); 203d38ceaf9SAlex Deucher amdgpu_atif_parse_functions(&atif->functions, output.function_bits); 204d38ceaf9SAlex Deucher 205d38ceaf9SAlex Deucher out: 206d38ceaf9SAlex Deucher kfree(info); 207d38ceaf9SAlex Deucher return err; 208d38ceaf9SAlex Deucher } 209d38ceaf9SAlex Deucher 210280cf1a9SLyude Paul static acpi_handle amdgpu_atif_probe_handle(acpi_handle dhandle) 211280cf1a9SLyude Paul { 212280cf1a9SLyude Paul acpi_handle handle = NULL; 213280cf1a9SLyude Paul char acpi_method_name[255] = { 0 }; 214280cf1a9SLyude Paul struct acpi_buffer buffer = { sizeof(acpi_method_name), acpi_method_name }; 215280cf1a9SLyude Paul acpi_status status; 216280cf1a9SLyude Paul 217280cf1a9SLyude Paul /* For PX/HG systems, ATIF and ATPX are in the iGPU's namespace, on dGPU only 218280cf1a9SLyude Paul * systems, ATIF is in the dGPU's namespace. 219280cf1a9SLyude Paul */ 220280cf1a9SLyude Paul status = acpi_get_handle(dhandle, "ATIF", &handle); 221280cf1a9SLyude Paul if (ACPI_SUCCESS(status)) 222280cf1a9SLyude Paul goto out; 223280cf1a9SLyude Paul 224280cf1a9SLyude Paul if (amdgpu_has_atpx()) { 225280cf1a9SLyude Paul status = acpi_get_handle(amdgpu_atpx_get_dhandle(), "ATIF", 226280cf1a9SLyude Paul &handle); 227280cf1a9SLyude Paul if (ACPI_SUCCESS(status)) 228280cf1a9SLyude Paul goto out; 229280cf1a9SLyude Paul } 230280cf1a9SLyude Paul 231280cf1a9SLyude Paul DRM_DEBUG_DRIVER("No ATIF handle found\n"); 232280cf1a9SLyude Paul return NULL; 233280cf1a9SLyude Paul out: 234280cf1a9SLyude Paul acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); 235280cf1a9SLyude Paul DRM_DEBUG_DRIVER("Found ATIF handle %s\n", acpi_method_name); 236280cf1a9SLyude Paul return handle; 237280cf1a9SLyude Paul } 238280cf1a9SLyude Paul 239d38ceaf9SAlex Deucher /** 240d38ceaf9SAlex Deucher * amdgpu_atif_get_notification_params - determine notify configuration 241d38ceaf9SAlex Deucher * 242d38ceaf9SAlex Deucher * @handle: acpi handle 243d38ceaf9SAlex Deucher * @n: atif notification configuration struct 244d38ceaf9SAlex Deucher * 245d38ceaf9SAlex Deucher * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function 246d38ceaf9SAlex Deucher * to determine if a notifier is used and if so which one 247d38ceaf9SAlex Deucher * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n) 248d38ceaf9SAlex Deucher * where n is specified in the result if a notifier is used. 249d38ceaf9SAlex Deucher * Returns 0 on success, error on failure. 250d38ceaf9SAlex Deucher */ 251280cf1a9SLyude Paul static int amdgpu_atif_get_notification_params(struct amdgpu_atif *atif) 252d38ceaf9SAlex Deucher { 253d38ceaf9SAlex Deucher union acpi_object *info; 254280cf1a9SLyude Paul struct amdgpu_atif_notification_cfg *n = &atif->notification_cfg; 255d38ceaf9SAlex Deucher struct atif_system_params params; 256d38ceaf9SAlex Deucher size_t size; 257d38ceaf9SAlex Deucher int err = 0; 258d38ceaf9SAlex Deucher 259280cf1a9SLyude Paul info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS, 260280cf1a9SLyude Paul NULL); 261d38ceaf9SAlex Deucher if (!info) { 262d38ceaf9SAlex Deucher err = -EIO; 263d38ceaf9SAlex Deucher goto out; 264d38ceaf9SAlex Deucher } 265d38ceaf9SAlex Deucher 266d38ceaf9SAlex Deucher size = *(u16 *) info->buffer.pointer; 267d38ceaf9SAlex Deucher if (size < 10) { 268d38ceaf9SAlex Deucher err = -EINVAL; 269d38ceaf9SAlex Deucher goto out; 270d38ceaf9SAlex Deucher } 271d38ceaf9SAlex Deucher 272d38ceaf9SAlex Deucher memset(¶ms, 0, sizeof(params)); 273d38ceaf9SAlex Deucher size = min(sizeof(params), size); 274d38ceaf9SAlex Deucher memcpy(¶ms, info->buffer.pointer, size); 275d38ceaf9SAlex Deucher 276d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n", 277d38ceaf9SAlex Deucher params.flags, params.valid_mask); 278d38ceaf9SAlex Deucher params.flags = params.flags & params.valid_mask; 279d38ceaf9SAlex Deucher 280d38ceaf9SAlex Deucher if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) { 281d38ceaf9SAlex Deucher n->enabled = false; 282d38ceaf9SAlex Deucher n->command_code = 0; 283d38ceaf9SAlex Deucher } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) { 284d38ceaf9SAlex Deucher n->enabled = true; 285d38ceaf9SAlex Deucher n->command_code = 0x81; 286d38ceaf9SAlex Deucher } else { 287d38ceaf9SAlex Deucher if (size < 11) { 288d38ceaf9SAlex Deucher err = -EINVAL; 289d38ceaf9SAlex Deucher goto out; 290d38ceaf9SAlex Deucher } 291d38ceaf9SAlex Deucher n->enabled = true; 292d38ceaf9SAlex Deucher n->command_code = params.command_code; 293d38ceaf9SAlex Deucher } 294d38ceaf9SAlex Deucher 295d38ceaf9SAlex Deucher out: 296d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n", 297d38ceaf9SAlex Deucher (n->enabled ? "enabled" : "disabled"), 298d38ceaf9SAlex Deucher n->command_code); 299d38ceaf9SAlex Deucher kfree(info); 300d38ceaf9SAlex Deucher return err; 301d38ceaf9SAlex Deucher } 302d38ceaf9SAlex Deucher 303d38ceaf9SAlex Deucher /** 304206bbafeSDavid Francis * amdgpu_atif_query_backlight_caps - get min and max backlight input signal 305206bbafeSDavid Francis * 306206bbafeSDavid Francis * @handle: acpi handle 307206bbafeSDavid Francis * 308206bbafeSDavid Francis * Execute the QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS ATIF function 309206bbafeSDavid Francis * to determine the acceptable range of backlight values 310206bbafeSDavid Francis * 311206bbafeSDavid Francis * Backlight_caps.caps_valid will be set to true if the query is successful 312206bbafeSDavid Francis * 313206bbafeSDavid Francis * The input signals are in range 0-255 314206bbafeSDavid Francis * 315206bbafeSDavid Francis * This function assumes the display with backlight is the first LCD 316206bbafeSDavid Francis * 317206bbafeSDavid Francis * Returns 0 on success, error on failure. 318206bbafeSDavid Francis */ 319206bbafeSDavid Francis static int amdgpu_atif_query_backlight_caps(struct amdgpu_atif *atif) 320206bbafeSDavid Francis { 321206bbafeSDavid Francis union acpi_object *info; 322206bbafeSDavid Francis struct atif_qbtc_output characteristics; 323206bbafeSDavid Francis struct atif_qbtc_arguments arguments; 324206bbafeSDavid Francis struct acpi_buffer params; 325206bbafeSDavid Francis size_t size; 326206bbafeSDavid Francis int err = 0; 327206bbafeSDavid Francis 328206bbafeSDavid Francis arguments.size = sizeof(arguments); 329206bbafeSDavid Francis arguments.requested_display = ATIF_QBTC_REQUEST_LCD1; 330206bbafeSDavid Francis 331206bbafeSDavid Francis params.length = sizeof(arguments); 332206bbafeSDavid Francis params.pointer = (void *)&arguments; 333206bbafeSDavid Francis 334206bbafeSDavid Francis info = amdgpu_atif_call(atif, 335206bbafeSDavid Francis ATIF_FUNCTION_QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS, 336206bbafeSDavid Francis ¶ms); 337206bbafeSDavid Francis if (!info) { 338206bbafeSDavid Francis err = -EIO; 339206bbafeSDavid Francis goto out; 340206bbafeSDavid Francis } 341206bbafeSDavid Francis 342206bbafeSDavid Francis size = *(u16 *) info->buffer.pointer; 343206bbafeSDavid Francis if (size < 10) { 344206bbafeSDavid Francis err = -EINVAL; 345206bbafeSDavid Francis goto out; 346206bbafeSDavid Francis } 347206bbafeSDavid Francis 348206bbafeSDavid Francis memset(&characteristics, 0, sizeof(characteristics)); 349206bbafeSDavid Francis size = min(sizeof(characteristics), size); 350206bbafeSDavid Francis memcpy(&characteristics, info->buffer.pointer, size); 351206bbafeSDavid Francis 352206bbafeSDavid Francis atif->backlight_caps.caps_valid = true; 353206bbafeSDavid Francis atif->backlight_caps.min_input_signal = 354206bbafeSDavid Francis characteristics.min_input_signal; 355206bbafeSDavid Francis atif->backlight_caps.max_input_signal = 356206bbafeSDavid Francis characteristics.max_input_signal; 357206bbafeSDavid Francis out: 358206bbafeSDavid Francis kfree(info); 359206bbafeSDavid Francis return err; 360206bbafeSDavid Francis } 361206bbafeSDavid Francis 362206bbafeSDavid Francis /** 363d38ceaf9SAlex Deucher * amdgpu_atif_get_sbios_requests - get requested sbios event 364d38ceaf9SAlex Deucher * 365d38ceaf9SAlex Deucher * @handle: acpi handle 366d38ceaf9SAlex Deucher * @req: atif sbios request struct 367d38ceaf9SAlex Deucher * 368d38ceaf9SAlex Deucher * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function 369d38ceaf9SAlex Deucher * to determine what requests the sbios is making to the driver 370d38ceaf9SAlex Deucher * (all asics). 371d38ceaf9SAlex Deucher * Returns 0 on success, error on failure. 372d38ceaf9SAlex Deucher */ 373280cf1a9SLyude Paul static int amdgpu_atif_get_sbios_requests(struct amdgpu_atif *atif, 374d38ceaf9SAlex Deucher struct atif_sbios_requests *req) 375d38ceaf9SAlex Deucher { 376d38ceaf9SAlex Deucher union acpi_object *info; 377d38ceaf9SAlex Deucher size_t size; 378d38ceaf9SAlex Deucher int count = 0; 379d38ceaf9SAlex Deucher 380280cf1a9SLyude Paul info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS, 381280cf1a9SLyude Paul NULL); 382d38ceaf9SAlex Deucher if (!info) 383d38ceaf9SAlex Deucher return -EIO; 384d38ceaf9SAlex Deucher 385d38ceaf9SAlex Deucher size = *(u16 *)info->buffer.pointer; 386d38ceaf9SAlex Deucher if (size < 0xd) { 387d38ceaf9SAlex Deucher count = -EINVAL; 388d38ceaf9SAlex Deucher goto out; 389d38ceaf9SAlex Deucher } 390d38ceaf9SAlex Deucher memset(req, 0, sizeof(*req)); 391d38ceaf9SAlex Deucher 392d38ceaf9SAlex Deucher size = min(sizeof(*req), size); 393d38ceaf9SAlex Deucher memcpy(req, info->buffer.pointer, size); 394d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending); 395d38ceaf9SAlex Deucher 396d38ceaf9SAlex Deucher count = hweight32(req->pending); 397d38ceaf9SAlex Deucher 398d38ceaf9SAlex Deucher out: 399d38ceaf9SAlex Deucher kfree(info); 400d38ceaf9SAlex Deucher return count; 401d38ceaf9SAlex Deucher } 402d38ceaf9SAlex Deucher 403d38ceaf9SAlex Deucher /** 404d38ceaf9SAlex Deucher * amdgpu_atif_handler - handle ATIF notify requests 405d38ceaf9SAlex Deucher * 406d38ceaf9SAlex Deucher * @adev: amdgpu_device pointer 407d38ceaf9SAlex Deucher * @event: atif sbios request struct 408d38ceaf9SAlex Deucher * 409d38ceaf9SAlex Deucher * Checks the acpi event and if it matches an atif event, 410d38ceaf9SAlex Deucher * handles it. 411582f58deSLyude Paul * 412582f58deSLyude Paul * Returns: 413582f58deSLyude Paul * NOTIFY_BAD or NOTIFY_DONE, depending on the event. 414d38ceaf9SAlex Deucher */ 415b7cecbe8SJean Delvare static int amdgpu_atif_handler(struct amdgpu_device *adev, 416d38ceaf9SAlex Deucher struct acpi_bus_event *event) 417d38ceaf9SAlex Deucher { 418102c16a0SLyude Paul struct amdgpu_atif *atif = adev->atif; 419d38ceaf9SAlex Deucher int count; 420d38ceaf9SAlex Deucher 421d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n", 422d38ceaf9SAlex Deucher event->device_class, event->type); 423d38ceaf9SAlex Deucher 424d38ceaf9SAlex Deucher if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) 425d38ceaf9SAlex Deucher return NOTIFY_DONE; 426d38ceaf9SAlex Deucher 427582f58deSLyude Paul /* Is this actually our event? */ 428102c16a0SLyude Paul if (!atif || 429102c16a0SLyude Paul !atif->notification_cfg.enabled || 430582f58deSLyude Paul event->type != atif->notification_cfg.command_code) { 431582f58deSLyude Paul /* These events will generate keypresses otherwise */ 432582f58deSLyude Paul if (event->type == ACPI_VIDEO_NOTIFY_PROBE) 433582f58deSLyude Paul return NOTIFY_BAD; 434582f58deSLyude Paul else 435d38ceaf9SAlex Deucher return NOTIFY_DONE; 436582f58deSLyude Paul } 437d38ceaf9SAlex Deucher 4389e7204beSAlex Deucher if (atif->functions.sbios_requests) { 4399e7204beSAlex Deucher struct atif_sbios_requests req; 4409e7204beSAlex Deucher 441d38ceaf9SAlex Deucher /* Check pending SBIOS requests */ 442280cf1a9SLyude Paul count = amdgpu_atif_get_sbios_requests(atif, &req); 443d38ceaf9SAlex Deucher 444d38ceaf9SAlex Deucher if (count <= 0) 445582f58deSLyude Paul return NOTIFY_BAD; 446d38ceaf9SAlex Deucher 447d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count); 448d38ceaf9SAlex Deucher 44997d798b2SAlex Deucher if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) { 45097d798b2SAlex Deucher #if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE) 45197d798b2SAlex Deucher if (atif->bd) { 452d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("Changing brightness to %d\n", 453d38ceaf9SAlex Deucher req.backlight_level); 454bcb7b0efSAndriy Gapon /* 455bcb7b0efSAndriy Gapon * XXX backlight_device_set_brightness() is 456bcb7b0efSAndriy Gapon * hardwired to post BACKLIGHT_UPDATE_SYSFS. 457bcb7b0efSAndriy Gapon * It probably should accept 'reason' parameter. 458bcb7b0efSAndriy Gapon */ 45997d798b2SAlex Deucher backlight_device_set_brightness(atif->bd, req.backlight_level); 460bcb7b0efSAndriy Gapon } 461bcb7b0efSAndriy Gapon #endif 46297d798b2SAlex Deucher } 46397d798b2SAlex Deucher 4641b0f568dSAlex Deucher if (req.pending & ATIF_DGPU_DISPLAY_EVENT) { 465bdb1ccb0SAaron Liu if (adev->flags & AMD_IS_PX) { 4664a580877SLuben Tuikov pm_runtime_get_sync(adev_to_drm(adev)->dev); 4671b0f568dSAlex Deucher /* Just fire off a uevent and let userspace tell us what to do */ 4684a580877SLuben Tuikov drm_helper_hpd_irq_event(adev_to_drm(adev)); 4694a580877SLuben Tuikov pm_runtime_mark_last_busy(adev_to_drm(adev)->dev); 4704a580877SLuben Tuikov pm_runtime_put_autosuspend(adev_to_drm(adev)->dev); 4711b0f568dSAlex Deucher } 4721b0f568dSAlex Deucher } 473d38ceaf9SAlex Deucher /* TODO: check other events */ 4749e7204beSAlex Deucher } 475d38ceaf9SAlex Deucher 476d38ceaf9SAlex Deucher /* We've handled the event, stop the notifier chain. The ACPI interface 477d38ceaf9SAlex Deucher * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to 478d38ceaf9SAlex Deucher * userspace if the event was generated only to signal a SBIOS 479d38ceaf9SAlex Deucher * request. 480d38ceaf9SAlex Deucher */ 481d38ceaf9SAlex Deucher return NOTIFY_BAD; 482d38ceaf9SAlex Deucher } 483d38ceaf9SAlex Deucher 484d38ceaf9SAlex Deucher /* Call the ATCS method 485d38ceaf9SAlex Deucher */ 486d38ceaf9SAlex Deucher /** 487d38ceaf9SAlex Deucher * amdgpu_atcs_call - call an ATCS method 488d38ceaf9SAlex Deucher * 489d38ceaf9SAlex Deucher * @handle: acpi handle 490d38ceaf9SAlex Deucher * @function: the ATCS function to execute 491d38ceaf9SAlex Deucher * @params: ATCS function params 492d38ceaf9SAlex Deucher * 493d38ceaf9SAlex Deucher * Executes the requested ATCS function (all asics). 494d38ceaf9SAlex Deucher * Returns a pointer to the acpi output buffer. 495d38ceaf9SAlex Deucher */ 496d38ceaf9SAlex Deucher static union acpi_object *amdgpu_atcs_call(acpi_handle handle, int function, 497d38ceaf9SAlex Deucher struct acpi_buffer *params) 498d38ceaf9SAlex Deucher { 499d38ceaf9SAlex Deucher acpi_status status; 500d38ceaf9SAlex Deucher union acpi_object atcs_arg_elements[2]; 501d38ceaf9SAlex Deucher struct acpi_object_list atcs_arg; 502d38ceaf9SAlex Deucher struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 503d38ceaf9SAlex Deucher 504d38ceaf9SAlex Deucher atcs_arg.count = 2; 505d38ceaf9SAlex Deucher atcs_arg.pointer = &atcs_arg_elements[0]; 506d38ceaf9SAlex Deucher 507d38ceaf9SAlex Deucher atcs_arg_elements[0].type = ACPI_TYPE_INTEGER; 508d38ceaf9SAlex Deucher atcs_arg_elements[0].integer.value = function; 509d38ceaf9SAlex Deucher 510d38ceaf9SAlex Deucher if (params) { 511d38ceaf9SAlex Deucher atcs_arg_elements[1].type = ACPI_TYPE_BUFFER; 512d38ceaf9SAlex Deucher atcs_arg_elements[1].buffer.length = params->length; 513d38ceaf9SAlex Deucher atcs_arg_elements[1].buffer.pointer = params->pointer; 514d38ceaf9SAlex Deucher } else { 515d38ceaf9SAlex Deucher /* We need a second fake parameter */ 516d38ceaf9SAlex Deucher atcs_arg_elements[1].type = ACPI_TYPE_INTEGER; 517d38ceaf9SAlex Deucher atcs_arg_elements[1].integer.value = 0; 518d38ceaf9SAlex Deucher } 519d38ceaf9SAlex Deucher 520d38ceaf9SAlex Deucher status = acpi_evaluate_object(handle, "ATCS", &atcs_arg, &buffer); 521d38ceaf9SAlex Deucher 522d38ceaf9SAlex Deucher /* Fail only if calling the method fails and ATIF is supported */ 523d38ceaf9SAlex Deucher if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 524d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n", 525d38ceaf9SAlex Deucher acpi_format_exception(status)); 526d38ceaf9SAlex Deucher kfree(buffer.pointer); 527d38ceaf9SAlex Deucher return NULL; 528d38ceaf9SAlex Deucher } 529d38ceaf9SAlex Deucher 530d38ceaf9SAlex Deucher return buffer.pointer; 531d38ceaf9SAlex Deucher } 532d38ceaf9SAlex Deucher 533d38ceaf9SAlex Deucher /** 534d38ceaf9SAlex Deucher * amdgpu_atcs_parse_functions - parse supported functions 535d38ceaf9SAlex Deucher * 536d38ceaf9SAlex Deucher * @f: supported functions struct 537d38ceaf9SAlex Deucher * @mask: supported functions mask from ATCS 538d38ceaf9SAlex Deucher * 539d38ceaf9SAlex Deucher * Use the supported functions mask from ATCS function 540d38ceaf9SAlex Deucher * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions 541d38ceaf9SAlex Deucher * are supported (all asics). 542d38ceaf9SAlex Deucher */ 543d38ceaf9SAlex Deucher static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask) 544d38ceaf9SAlex Deucher { 545d38ceaf9SAlex Deucher f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED; 546d38ceaf9SAlex Deucher f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED; 547d38ceaf9SAlex Deucher f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED; 548d38ceaf9SAlex Deucher f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED; 549d38ceaf9SAlex Deucher } 550d38ceaf9SAlex Deucher 551d38ceaf9SAlex Deucher /** 552d38ceaf9SAlex Deucher * amdgpu_atcs_verify_interface - verify ATCS 553d38ceaf9SAlex Deucher * 554d38ceaf9SAlex Deucher * @handle: acpi handle 555d38ceaf9SAlex Deucher * @atcs: amdgpu atcs struct 556d38ceaf9SAlex Deucher * 557d38ceaf9SAlex Deucher * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function 558d38ceaf9SAlex Deucher * to initialize ATCS and determine what features are supported 559d38ceaf9SAlex Deucher * (all asics). 560d38ceaf9SAlex Deucher * returns 0 on success, error on failure. 561d38ceaf9SAlex Deucher */ 562d38ceaf9SAlex Deucher static int amdgpu_atcs_verify_interface(acpi_handle handle, 563d38ceaf9SAlex Deucher struct amdgpu_atcs *atcs) 564d38ceaf9SAlex Deucher { 565d38ceaf9SAlex Deucher union acpi_object *info; 566d38ceaf9SAlex Deucher struct atcs_verify_interface output; 567d38ceaf9SAlex Deucher size_t size; 568d38ceaf9SAlex Deucher int err = 0; 569d38ceaf9SAlex Deucher 570d38ceaf9SAlex Deucher info = amdgpu_atcs_call(handle, ATCS_FUNCTION_VERIFY_INTERFACE, NULL); 571d38ceaf9SAlex Deucher if (!info) 572d38ceaf9SAlex Deucher return -EIO; 573d38ceaf9SAlex Deucher 574d38ceaf9SAlex Deucher memset(&output, 0, sizeof(output)); 575d38ceaf9SAlex Deucher 576d38ceaf9SAlex Deucher size = *(u16 *) info->buffer.pointer; 577d38ceaf9SAlex Deucher if (size < 8) { 578d38ceaf9SAlex Deucher DRM_INFO("ATCS buffer is too small: %zu\n", size); 579d38ceaf9SAlex Deucher err = -EINVAL; 580d38ceaf9SAlex Deucher goto out; 581d38ceaf9SAlex Deucher } 582d38ceaf9SAlex Deucher size = min(sizeof(output), size); 583d38ceaf9SAlex Deucher 584d38ceaf9SAlex Deucher memcpy(&output, info->buffer.pointer, size); 585d38ceaf9SAlex Deucher 586d38ceaf9SAlex Deucher /* TODO: check version? */ 587d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("ATCS version %u\n", output.version); 588d38ceaf9SAlex Deucher 589d38ceaf9SAlex Deucher amdgpu_atcs_parse_functions(&atcs->functions, output.function_bits); 590d38ceaf9SAlex Deucher 591d38ceaf9SAlex Deucher out: 592d38ceaf9SAlex Deucher kfree(info); 593d38ceaf9SAlex Deucher return err; 594d38ceaf9SAlex Deucher } 595d38ceaf9SAlex Deucher 596d38ceaf9SAlex Deucher /** 597d38ceaf9SAlex Deucher * amdgpu_acpi_is_pcie_performance_request_supported 598d38ceaf9SAlex Deucher * 599d38ceaf9SAlex Deucher * @adev: amdgpu_device pointer 600d38ceaf9SAlex Deucher * 601d38ceaf9SAlex Deucher * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods 602d38ceaf9SAlex Deucher * are supported (all asics). 603d38ceaf9SAlex Deucher * returns true if supported, false if not. 604d38ceaf9SAlex Deucher */ 605d38ceaf9SAlex Deucher bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev) 606d38ceaf9SAlex Deucher { 607d38ceaf9SAlex Deucher struct amdgpu_atcs *atcs = &adev->atcs; 608d38ceaf9SAlex Deucher 609d38ceaf9SAlex Deucher if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy) 610d38ceaf9SAlex Deucher return true; 611d38ceaf9SAlex Deucher 612d38ceaf9SAlex Deucher return false; 613d38ceaf9SAlex Deucher } 614d38ceaf9SAlex Deucher 615d38ceaf9SAlex Deucher /** 616d38ceaf9SAlex Deucher * amdgpu_acpi_pcie_notify_device_ready 617d38ceaf9SAlex Deucher * 618d38ceaf9SAlex Deucher * @adev: amdgpu_device pointer 619d38ceaf9SAlex Deucher * 620d38ceaf9SAlex Deucher * Executes the PCIE_DEVICE_READY_NOTIFICATION method 621d38ceaf9SAlex Deucher * (all asics). 622d38ceaf9SAlex Deucher * returns 0 on success, error on failure. 623d38ceaf9SAlex Deucher */ 624d38ceaf9SAlex Deucher int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev) 625d38ceaf9SAlex Deucher { 626d38ceaf9SAlex Deucher acpi_handle handle; 627d38ceaf9SAlex Deucher union acpi_object *info; 628d38ceaf9SAlex Deucher struct amdgpu_atcs *atcs = &adev->atcs; 629d38ceaf9SAlex Deucher 630d38ceaf9SAlex Deucher /* Get the device handle */ 631d38ceaf9SAlex Deucher handle = ACPI_HANDLE(&adev->pdev->dev); 632d38ceaf9SAlex Deucher if (!handle) 633d38ceaf9SAlex Deucher return -EINVAL; 634d38ceaf9SAlex Deucher 635d38ceaf9SAlex Deucher if (!atcs->functions.pcie_dev_rdy) 636d38ceaf9SAlex Deucher return -EINVAL; 637d38ceaf9SAlex Deucher 638d38ceaf9SAlex Deucher info = amdgpu_atcs_call(handle, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL); 639d38ceaf9SAlex Deucher if (!info) 640d38ceaf9SAlex Deucher return -EIO; 641d38ceaf9SAlex Deucher 642d38ceaf9SAlex Deucher kfree(info); 643d38ceaf9SAlex Deucher 644d38ceaf9SAlex Deucher return 0; 645d38ceaf9SAlex Deucher } 646d38ceaf9SAlex Deucher 647d38ceaf9SAlex Deucher /** 648d38ceaf9SAlex Deucher * amdgpu_acpi_pcie_performance_request 649d38ceaf9SAlex Deucher * 650d38ceaf9SAlex Deucher * @adev: amdgpu_device pointer 651d38ceaf9SAlex Deucher * @perf_req: requested perf level (pcie gen speed) 652d38ceaf9SAlex Deucher * @advertise: set advertise caps flag if set 653d38ceaf9SAlex Deucher * 654d38ceaf9SAlex Deucher * Executes the PCIE_PERFORMANCE_REQUEST method to 655d38ceaf9SAlex Deucher * change the pcie gen speed (all asics). 656d38ceaf9SAlex Deucher * returns 0 on success, error on failure. 657d38ceaf9SAlex Deucher */ 658d38ceaf9SAlex Deucher int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev, 659d38ceaf9SAlex Deucher u8 perf_req, bool advertise) 660d38ceaf9SAlex Deucher { 661d38ceaf9SAlex Deucher acpi_handle handle; 662d38ceaf9SAlex Deucher union acpi_object *info; 663d38ceaf9SAlex Deucher struct amdgpu_atcs *atcs = &adev->atcs; 664d38ceaf9SAlex Deucher struct atcs_pref_req_input atcs_input; 665d38ceaf9SAlex Deucher struct atcs_pref_req_output atcs_output; 666d38ceaf9SAlex Deucher struct acpi_buffer params; 667d38ceaf9SAlex Deucher size_t size; 668d38ceaf9SAlex Deucher u32 retry = 3; 669d38ceaf9SAlex Deucher 6701bced75fSRex Zhu if (amdgpu_acpi_pcie_notify_device_ready(adev)) 6711bced75fSRex Zhu return -EINVAL; 6721bced75fSRex Zhu 673d38ceaf9SAlex Deucher /* Get the device handle */ 674d38ceaf9SAlex Deucher handle = ACPI_HANDLE(&adev->pdev->dev); 675d38ceaf9SAlex Deucher if (!handle) 676d38ceaf9SAlex Deucher return -EINVAL; 677d38ceaf9SAlex Deucher 678d38ceaf9SAlex Deucher if (!atcs->functions.pcie_perf_req) 679d38ceaf9SAlex Deucher return -EINVAL; 680d38ceaf9SAlex Deucher 681d38ceaf9SAlex Deucher atcs_input.size = sizeof(struct atcs_pref_req_input); 682d38ceaf9SAlex Deucher /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */ 683d38ceaf9SAlex Deucher atcs_input.client_id = adev->pdev->devfn | (adev->pdev->bus->number << 8); 684d38ceaf9SAlex Deucher atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK; 685d38ceaf9SAlex Deucher atcs_input.flags = ATCS_WAIT_FOR_COMPLETION; 686d38ceaf9SAlex Deucher if (advertise) 687d38ceaf9SAlex Deucher atcs_input.flags |= ATCS_ADVERTISE_CAPS; 688d38ceaf9SAlex Deucher atcs_input.req_type = ATCS_PCIE_LINK_SPEED; 689d38ceaf9SAlex Deucher atcs_input.perf_req = perf_req; 690d38ceaf9SAlex Deucher 691d38ceaf9SAlex Deucher params.length = sizeof(struct atcs_pref_req_input); 692d38ceaf9SAlex Deucher params.pointer = &atcs_input; 693d38ceaf9SAlex Deucher 694d38ceaf9SAlex Deucher while (retry--) { 695d38ceaf9SAlex Deucher info = amdgpu_atcs_call(handle, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms); 696d38ceaf9SAlex Deucher if (!info) 697d38ceaf9SAlex Deucher return -EIO; 698d38ceaf9SAlex Deucher 699d38ceaf9SAlex Deucher memset(&atcs_output, 0, sizeof(atcs_output)); 700d38ceaf9SAlex Deucher 701d38ceaf9SAlex Deucher size = *(u16 *) info->buffer.pointer; 702d38ceaf9SAlex Deucher if (size < 3) { 703d38ceaf9SAlex Deucher DRM_INFO("ATCS buffer is too small: %zu\n", size); 704d38ceaf9SAlex Deucher kfree(info); 705d38ceaf9SAlex Deucher return -EINVAL; 706d38ceaf9SAlex Deucher } 707d38ceaf9SAlex Deucher size = min(sizeof(atcs_output), size); 708d38ceaf9SAlex Deucher 709d38ceaf9SAlex Deucher memcpy(&atcs_output, info->buffer.pointer, size); 710d38ceaf9SAlex Deucher 711d38ceaf9SAlex Deucher kfree(info); 712d38ceaf9SAlex Deucher 713d38ceaf9SAlex Deucher switch (atcs_output.ret_val) { 714d38ceaf9SAlex Deucher case ATCS_REQUEST_REFUSED: 715d38ceaf9SAlex Deucher default: 716d38ceaf9SAlex Deucher return -EINVAL; 717d38ceaf9SAlex Deucher case ATCS_REQUEST_COMPLETE: 718d38ceaf9SAlex Deucher return 0; 719d38ceaf9SAlex Deucher case ATCS_REQUEST_IN_PROGRESS: 720d38ceaf9SAlex Deucher udelay(10); 721d38ceaf9SAlex Deucher break; 722d38ceaf9SAlex Deucher } 723d38ceaf9SAlex Deucher } 724d38ceaf9SAlex Deucher 725d38ceaf9SAlex Deucher return 0; 726d38ceaf9SAlex Deucher } 727d38ceaf9SAlex Deucher 728d38ceaf9SAlex Deucher /** 729d38ceaf9SAlex Deucher * amdgpu_acpi_event - handle notify events 730d38ceaf9SAlex Deucher * 731d38ceaf9SAlex Deucher * @nb: notifier block 732d38ceaf9SAlex Deucher * @val: val 733d38ceaf9SAlex Deucher * @data: acpi event 734d38ceaf9SAlex Deucher * 735d38ceaf9SAlex Deucher * Calls relevant amdgpu functions in response to various 736d38ceaf9SAlex Deucher * acpi events. 737d38ceaf9SAlex Deucher * Returns NOTIFY code 738d38ceaf9SAlex Deucher */ 739d38ceaf9SAlex Deucher static int amdgpu_acpi_event(struct notifier_block *nb, 740d38ceaf9SAlex Deucher unsigned long val, 741d38ceaf9SAlex Deucher void *data) 742d38ceaf9SAlex Deucher { 743d38ceaf9SAlex Deucher struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb); 744d38ceaf9SAlex Deucher struct acpi_bus_event *entry = (struct acpi_bus_event *)data; 745d38ceaf9SAlex Deucher 746d38ceaf9SAlex Deucher if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) { 747d38ceaf9SAlex Deucher if (power_supply_is_system_supplied() > 0) 748d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("pm: AC\n"); 749d38ceaf9SAlex Deucher else 750d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("pm: DC\n"); 751d38ceaf9SAlex Deucher 752d38ceaf9SAlex Deucher amdgpu_pm_acpi_event_handler(adev); 753d38ceaf9SAlex Deucher } 754d38ceaf9SAlex Deucher 755d38ceaf9SAlex Deucher /* Check for pending SBIOS requests */ 756d38ceaf9SAlex Deucher return amdgpu_atif_handler(adev, entry); 757d38ceaf9SAlex Deucher } 758d38ceaf9SAlex Deucher 759d38ceaf9SAlex Deucher /* Call all ACPI methods here */ 760d38ceaf9SAlex Deucher /** 761d38ceaf9SAlex Deucher * amdgpu_acpi_init - init driver acpi support 762d38ceaf9SAlex Deucher * 763d38ceaf9SAlex Deucher * @adev: amdgpu_device pointer 764d38ceaf9SAlex Deucher * 765d38ceaf9SAlex Deucher * Verifies the AMD ACPI interfaces and registers with the acpi 766d38ceaf9SAlex Deucher * notifier chain (all asics). 767d38ceaf9SAlex Deucher * Returns 0 on success, error on failure. 768d38ceaf9SAlex Deucher */ 769d38ceaf9SAlex Deucher int amdgpu_acpi_init(struct amdgpu_device *adev) 770d38ceaf9SAlex Deucher { 771280cf1a9SLyude Paul acpi_handle handle, atif_handle; 772102c16a0SLyude Paul struct amdgpu_atif *atif; 773d38ceaf9SAlex Deucher struct amdgpu_atcs *atcs = &adev->atcs; 774d38ceaf9SAlex Deucher int ret; 775d38ceaf9SAlex Deucher 776d38ceaf9SAlex Deucher /* Get the device handle */ 777d38ceaf9SAlex Deucher handle = ACPI_HANDLE(&adev->pdev->dev); 778d38ceaf9SAlex Deucher 779d38ceaf9SAlex Deucher if (!adev->bios || !handle) 780d38ceaf9SAlex Deucher return 0; 781d38ceaf9SAlex Deucher 782d38ceaf9SAlex Deucher /* Call the ATCS method */ 783d38ceaf9SAlex Deucher ret = amdgpu_atcs_verify_interface(handle, atcs); 784d38ceaf9SAlex Deucher if (ret) { 785d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("Call to ATCS verify_interface failed: %d\n", ret); 786d38ceaf9SAlex Deucher } 787d38ceaf9SAlex Deucher 788280cf1a9SLyude Paul /* Probe for ATIF, and initialize it if found */ 789280cf1a9SLyude Paul atif_handle = amdgpu_atif_probe_handle(handle); 790280cf1a9SLyude Paul if (!atif_handle) 791280cf1a9SLyude Paul goto out; 792280cf1a9SLyude Paul 793102c16a0SLyude Paul atif = kzalloc(sizeof(*atif), GFP_KERNEL); 794102c16a0SLyude Paul if (!atif) { 795102c16a0SLyude Paul DRM_WARN("Not enough memory to initialize ATIF\n"); 796102c16a0SLyude Paul goto out; 797102c16a0SLyude Paul } 798280cf1a9SLyude Paul atif->handle = atif_handle; 799102c16a0SLyude Paul 800280cf1a9SLyude Paul /* Call the ATIF method */ 801280cf1a9SLyude Paul ret = amdgpu_atif_verify_interface(atif); 802d38ceaf9SAlex Deucher if (ret) { 803d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("Call to ATIF verify_interface failed: %d\n", ret); 804102c16a0SLyude Paul kfree(atif); 805d38ceaf9SAlex Deucher goto out; 806d38ceaf9SAlex Deucher } 807102c16a0SLyude Paul adev->atif = atif; 808d38ceaf9SAlex Deucher 80997d798b2SAlex Deucher #if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE) 810*9c27bc97SYe Bin if (atif->notifications.brightness_change) { 81197d798b2SAlex Deucher if (amdgpu_device_has_dc_support(adev)) { 81297d798b2SAlex Deucher #if defined(CONFIG_DRM_AMD_DC) 81397d798b2SAlex Deucher struct amdgpu_display_manager *dm = &adev->dm; 81497d798b2SAlex Deucher atif->bd = dm->backlight_dev; 81597d798b2SAlex Deucher #endif 81697d798b2SAlex Deucher } else { 817d38ceaf9SAlex Deucher struct drm_encoder *tmp; 818d38ceaf9SAlex Deucher 819d38ceaf9SAlex Deucher /* Find the encoder controlling the brightness */ 8204a580877SLuben Tuikov list_for_each_entry(tmp, &adev_to_drm(adev)->mode_config.encoder_list, 821d38ceaf9SAlex Deucher head) { 822d38ceaf9SAlex Deucher struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp); 823d38ceaf9SAlex Deucher 824d38ceaf9SAlex Deucher if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) && 825d38ceaf9SAlex Deucher enc->enc_priv) { 826d38ceaf9SAlex Deucher struct amdgpu_encoder_atom_dig *dig = enc->enc_priv; 827d38ceaf9SAlex Deucher if (dig->bl_dev) { 82897d798b2SAlex Deucher atif->bd = dig->bl_dev; 829d38ceaf9SAlex Deucher break; 830d38ceaf9SAlex Deucher } 831d38ceaf9SAlex Deucher } 832d38ceaf9SAlex Deucher } 833d38ceaf9SAlex Deucher } 83497d798b2SAlex Deucher } 83597d798b2SAlex Deucher #endif 836d38ceaf9SAlex Deucher 837d38ceaf9SAlex Deucher if (atif->functions.sbios_requests && !atif->functions.system_params) { 838d38ceaf9SAlex Deucher /* XXX check this workraround, if sbios request function is 839d38ceaf9SAlex Deucher * present we have to see how it's configured in the system 840d38ceaf9SAlex Deucher * params 841d38ceaf9SAlex Deucher */ 842d38ceaf9SAlex Deucher atif->functions.system_params = true; 843d38ceaf9SAlex Deucher } 844d38ceaf9SAlex Deucher 845d38ceaf9SAlex Deucher if (atif->functions.system_params) { 846280cf1a9SLyude Paul ret = amdgpu_atif_get_notification_params(atif); 847d38ceaf9SAlex Deucher if (ret) { 848d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n", 849d38ceaf9SAlex Deucher ret); 850d38ceaf9SAlex Deucher /* Disable notification */ 851d38ceaf9SAlex Deucher atif->notification_cfg.enabled = false; 852d38ceaf9SAlex Deucher } 853d38ceaf9SAlex Deucher } 854d38ceaf9SAlex Deucher 855206bbafeSDavid Francis if (atif->functions.query_backlight_transfer_characteristics) { 856206bbafeSDavid Francis ret = amdgpu_atif_query_backlight_caps(atif); 857206bbafeSDavid Francis if (ret) { 858206bbafeSDavid Francis DRM_DEBUG_DRIVER("Call to QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS failed: %d\n", 859206bbafeSDavid Francis ret); 860206bbafeSDavid Francis atif->backlight_caps.caps_valid = false; 861206bbafeSDavid Francis } 862206bbafeSDavid Francis } else { 863206bbafeSDavid Francis atif->backlight_caps.caps_valid = false; 864206bbafeSDavid Francis } 865206bbafeSDavid Francis 866d38ceaf9SAlex Deucher out: 867d38ceaf9SAlex Deucher adev->acpi_nb.notifier_call = amdgpu_acpi_event; 868d38ceaf9SAlex Deucher register_acpi_notifier(&adev->acpi_nb); 869d38ceaf9SAlex Deucher 870d38ceaf9SAlex Deucher return ret; 871d38ceaf9SAlex Deucher } 872d38ceaf9SAlex Deucher 873206bbafeSDavid Francis void amdgpu_acpi_get_backlight_caps(struct amdgpu_device *adev, 874206bbafeSDavid Francis struct amdgpu_dm_backlight_caps *caps) 875206bbafeSDavid Francis { 876206bbafeSDavid Francis if (!adev->atif) { 877206bbafeSDavid Francis caps->caps_valid = false; 878206bbafeSDavid Francis return; 879206bbafeSDavid Francis } 880206bbafeSDavid Francis caps->caps_valid = adev->atif->backlight_caps.caps_valid; 881206bbafeSDavid Francis caps->min_input_signal = adev->atif->backlight_caps.min_input_signal; 882206bbafeSDavid Francis caps->max_input_signal = adev->atif->backlight_caps.max_input_signal; 883206bbafeSDavid Francis } 884206bbafeSDavid Francis 885d38ceaf9SAlex Deucher /** 886d38ceaf9SAlex Deucher * amdgpu_acpi_fini - tear down driver acpi support 887d38ceaf9SAlex Deucher * 888d38ceaf9SAlex Deucher * @adev: amdgpu_device pointer 889d38ceaf9SAlex Deucher * 890d38ceaf9SAlex Deucher * Unregisters with the acpi notifier chain (all asics). 891d38ceaf9SAlex Deucher */ 892d38ceaf9SAlex Deucher void amdgpu_acpi_fini(struct amdgpu_device *adev) 893d38ceaf9SAlex Deucher { 894d38ceaf9SAlex Deucher unregister_acpi_notifier(&adev->acpi_nb); 895102c16a0SLyude Paul kfree(adev->atif); 896d38ceaf9SAlex Deucher } 897