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> 30d38ceaf9SAlex Deucher #include <drm/drmP.h> 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; 67102c16a0SLyude Paul struct amdgpu_encoder *encoder_for_bl; 68206bbafeSDavid Francis struct amdgpu_dm_backlight_caps backlight_caps; 69102c16a0SLyude Paul }; 70102c16a0SLyude Paul 71d38ceaf9SAlex Deucher /* Call the ATIF method 72d38ceaf9SAlex Deucher */ 73d38ceaf9SAlex Deucher /** 74d38ceaf9SAlex Deucher * amdgpu_atif_call - call an ATIF method 75d38ceaf9SAlex Deucher * 76d38ceaf9SAlex Deucher * @handle: acpi handle 77d38ceaf9SAlex Deucher * @function: the ATIF function to execute 78d38ceaf9SAlex Deucher * @params: ATIF function params 79d38ceaf9SAlex Deucher * 80d38ceaf9SAlex Deucher * Executes the requested ATIF function (all asics). 81d38ceaf9SAlex Deucher * Returns a pointer to the acpi output buffer. 82d38ceaf9SAlex Deucher */ 83280cf1a9SLyude Paul static union acpi_object *amdgpu_atif_call(struct amdgpu_atif *atif, 84280cf1a9SLyude Paul int function, 85d38ceaf9SAlex Deucher struct acpi_buffer *params) 86d38ceaf9SAlex Deucher { 87d38ceaf9SAlex Deucher acpi_status status; 88d38ceaf9SAlex Deucher union acpi_object atif_arg_elements[2]; 89d38ceaf9SAlex Deucher struct acpi_object_list atif_arg; 90d38ceaf9SAlex Deucher struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 91d38ceaf9SAlex Deucher 92d38ceaf9SAlex Deucher atif_arg.count = 2; 93d38ceaf9SAlex Deucher atif_arg.pointer = &atif_arg_elements[0]; 94d38ceaf9SAlex Deucher 95d38ceaf9SAlex Deucher atif_arg_elements[0].type = ACPI_TYPE_INTEGER; 96d38ceaf9SAlex Deucher atif_arg_elements[0].integer.value = function; 97d38ceaf9SAlex Deucher 98d38ceaf9SAlex Deucher if (params) { 99d38ceaf9SAlex Deucher atif_arg_elements[1].type = ACPI_TYPE_BUFFER; 100d38ceaf9SAlex Deucher atif_arg_elements[1].buffer.length = params->length; 101d38ceaf9SAlex Deucher atif_arg_elements[1].buffer.pointer = params->pointer; 102d38ceaf9SAlex Deucher } else { 103d38ceaf9SAlex Deucher /* We need a second fake parameter */ 104d38ceaf9SAlex Deucher atif_arg_elements[1].type = ACPI_TYPE_INTEGER; 105d38ceaf9SAlex Deucher atif_arg_elements[1].integer.value = 0; 106d38ceaf9SAlex Deucher } 107d38ceaf9SAlex Deucher 108280cf1a9SLyude Paul status = acpi_evaluate_object(atif->handle, NULL, &atif_arg, 109280cf1a9SLyude Paul &buffer); 110d38ceaf9SAlex Deucher 111d38ceaf9SAlex Deucher /* Fail only if calling the method fails and ATIF is supported */ 112d38ceaf9SAlex Deucher if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 113d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n", 114d38ceaf9SAlex Deucher acpi_format_exception(status)); 115d38ceaf9SAlex Deucher kfree(buffer.pointer); 116d38ceaf9SAlex Deucher return NULL; 117d38ceaf9SAlex Deucher } 118d38ceaf9SAlex Deucher 119d38ceaf9SAlex Deucher return buffer.pointer; 120d38ceaf9SAlex Deucher } 121d38ceaf9SAlex Deucher 122d38ceaf9SAlex Deucher /** 123d38ceaf9SAlex Deucher * amdgpu_atif_parse_notification - parse supported notifications 124d38ceaf9SAlex Deucher * 125d38ceaf9SAlex Deucher * @n: supported notifications struct 126d38ceaf9SAlex Deucher * @mask: supported notifications mask from ATIF 127d38ceaf9SAlex Deucher * 128d38ceaf9SAlex Deucher * Use the supported notifications mask from ATIF function 129d38ceaf9SAlex Deucher * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications 130d38ceaf9SAlex Deucher * are supported (all asics). 131d38ceaf9SAlex Deucher */ 132d38ceaf9SAlex Deucher static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask) 133d38ceaf9SAlex Deucher { 134d38ceaf9SAlex Deucher n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED; 135d38ceaf9SAlex Deucher n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED; 136d38ceaf9SAlex Deucher n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED; 137d38ceaf9SAlex Deucher n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED; 138d38ceaf9SAlex Deucher n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED; 1397349a3afSDavid Francis n->gpu_package_power_limit = mask & ATIF_GPU_PACKAGE_POWER_LIMIT_REQUEST_SUPPORTED; 140d38ceaf9SAlex Deucher } 141d38ceaf9SAlex Deucher 142d38ceaf9SAlex Deucher /** 143d38ceaf9SAlex Deucher * amdgpu_atif_parse_functions - parse supported functions 144d38ceaf9SAlex Deucher * 145d38ceaf9SAlex Deucher * @f: supported functions struct 146d38ceaf9SAlex Deucher * @mask: supported functions mask from ATIF 147d38ceaf9SAlex Deucher * 148d38ceaf9SAlex Deucher * Use the supported functions mask from ATIF function 149d38ceaf9SAlex Deucher * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions 150d38ceaf9SAlex Deucher * are supported (all asics). 151d38ceaf9SAlex Deucher */ 152d38ceaf9SAlex Deucher static void amdgpu_atif_parse_functions(struct amdgpu_atif_functions *f, u32 mask) 153d38ceaf9SAlex Deucher { 154d38ceaf9SAlex Deucher f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED; 155d38ceaf9SAlex Deucher f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED; 156d38ceaf9SAlex Deucher f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED; 1577349a3afSDavid Francis f->query_backlight_transfer_characteristics = 1587349a3afSDavid Francis mask & ATIF_QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS_SUPPORTED; 1597349a3afSDavid Francis f->ready_to_undock = mask & ATIF_READY_TO_UNDOCK_NOTIFICATION_SUPPORTED; 1607349a3afSDavid Francis f->external_gpu_information = mask & ATIF_GET_EXTERNAL_GPU_INFORMATION_SUPPORTED; 161d38ceaf9SAlex Deucher } 162d38ceaf9SAlex Deucher 163d38ceaf9SAlex Deucher /** 164d38ceaf9SAlex Deucher * amdgpu_atif_verify_interface - verify ATIF 165d38ceaf9SAlex Deucher * 166d38ceaf9SAlex Deucher * @handle: acpi handle 167d38ceaf9SAlex Deucher * @atif: amdgpu atif struct 168d38ceaf9SAlex Deucher * 169d38ceaf9SAlex Deucher * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function 170d38ceaf9SAlex Deucher * to initialize ATIF and determine what features are supported 171d38ceaf9SAlex Deucher * (all asics). 172d38ceaf9SAlex Deucher * returns 0 on success, error on failure. 173d38ceaf9SAlex Deucher */ 174280cf1a9SLyude Paul static int amdgpu_atif_verify_interface(struct amdgpu_atif *atif) 175d38ceaf9SAlex Deucher { 176d38ceaf9SAlex Deucher union acpi_object *info; 177d38ceaf9SAlex Deucher struct atif_verify_interface output; 178d38ceaf9SAlex Deucher size_t size; 179d38ceaf9SAlex Deucher int err = 0; 180d38ceaf9SAlex Deucher 181280cf1a9SLyude Paul info = amdgpu_atif_call(atif, ATIF_FUNCTION_VERIFY_INTERFACE, NULL); 182d38ceaf9SAlex Deucher if (!info) 183d38ceaf9SAlex Deucher return -EIO; 184d38ceaf9SAlex Deucher 185d38ceaf9SAlex Deucher memset(&output, 0, sizeof(output)); 186d38ceaf9SAlex Deucher 187d38ceaf9SAlex Deucher size = *(u16 *) info->buffer.pointer; 188d38ceaf9SAlex Deucher if (size < 12) { 189d38ceaf9SAlex Deucher DRM_INFO("ATIF buffer is too small: %zu\n", size); 190d38ceaf9SAlex Deucher err = -EINVAL; 191d38ceaf9SAlex Deucher goto out; 192d38ceaf9SAlex Deucher } 193d38ceaf9SAlex Deucher size = min(sizeof(output), size); 194d38ceaf9SAlex Deucher 195d38ceaf9SAlex Deucher memcpy(&output, info->buffer.pointer, size); 196d38ceaf9SAlex Deucher 197d38ceaf9SAlex Deucher /* TODO: check version? */ 198d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("ATIF version %u\n", output.version); 199d38ceaf9SAlex Deucher 200d38ceaf9SAlex Deucher amdgpu_atif_parse_notification(&atif->notifications, output.notification_mask); 201d38ceaf9SAlex Deucher amdgpu_atif_parse_functions(&atif->functions, output.function_bits); 202d38ceaf9SAlex Deucher 203d38ceaf9SAlex Deucher out: 204d38ceaf9SAlex Deucher kfree(info); 205d38ceaf9SAlex Deucher return err; 206d38ceaf9SAlex Deucher } 207d38ceaf9SAlex Deucher 208280cf1a9SLyude Paul static acpi_handle amdgpu_atif_probe_handle(acpi_handle dhandle) 209280cf1a9SLyude Paul { 210280cf1a9SLyude Paul acpi_handle handle = NULL; 211280cf1a9SLyude Paul char acpi_method_name[255] = { 0 }; 212280cf1a9SLyude Paul struct acpi_buffer buffer = { sizeof(acpi_method_name), acpi_method_name }; 213280cf1a9SLyude Paul acpi_status status; 214280cf1a9SLyude Paul 215280cf1a9SLyude Paul /* For PX/HG systems, ATIF and ATPX are in the iGPU's namespace, on dGPU only 216280cf1a9SLyude Paul * systems, ATIF is in the dGPU's namespace. 217280cf1a9SLyude Paul */ 218280cf1a9SLyude Paul status = acpi_get_handle(dhandle, "ATIF", &handle); 219280cf1a9SLyude Paul if (ACPI_SUCCESS(status)) 220280cf1a9SLyude Paul goto out; 221280cf1a9SLyude Paul 222280cf1a9SLyude Paul if (amdgpu_has_atpx()) { 223280cf1a9SLyude Paul status = acpi_get_handle(amdgpu_atpx_get_dhandle(), "ATIF", 224280cf1a9SLyude Paul &handle); 225280cf1a9SLyude Paul if (ACPI_SUCCESS(status)) 226280cf1a9SLyude Paul goto out; 227280cf1a9SLyude Paul } 228280cf1a9SLyude Paul 229280cf1a9SLyude Paul DRM_DEBUG_DRIVER("No ATIF handle found\n"); 230280cf1a9SLyude Paul return NULL; 231280cf1a9SLyude Paul out: 232280cf1a9SLyude Paul acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); 233280cf1a9SLyude Paul DRM_DEBUG_DRIVER("Found ATIF handle %s\n", acpi_method_name); 234280cf1a9SLyude Paul return handle; 235280cf1a9SLyude Paul } 236280cf1a9SLyude Paul 237d38ceaf9SAlex Deucher /** 238d38ceaf9SAlex Deucher * amdgpu_atif_get_notification_params - determine notify configuration 239d38ceaf9SAlex Deucher * 240d38ceaf9SAlex Deucher * @handle: acpi handle 241d38ceaf9SAlex Deucher * @n: atif notification configuration struct 242d38ceaf9SAlex Deucher * 243d38ceaf9SAlex Deucher * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function 244d38ceaf9SAlex Deucher * to determine if a notifier is used and if so which one 245d38ceaf9SAlex Deucher * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n) 246d38ceaf9SAlex Deucher * where n is specified in the result if a notifier is used. 247d38ceaf9SAlex Deucher * Returns 0 on success, error on failure. 248d38ceaf9SAlex Deucher */ 249280cf1a9SLyude Paul static int amdgpu_atif_get_notification_params(struct amdgpu_atif *atif) 250d38ceaf9SAlex Deucher { 251d38ceaf9SAlex Deucher union acpi_object *info; 252280cf1a9SLyude Paul struct amdgpu_atif_notification_cfg *n = &atif->notification_cfg; 253d38ceaf9SAlex Deucher struct atif_system_params params; 254d38ceaf9SAlex Deucher size_t size; 255d38ceaf9SAlex Deucher int err = 0; 256d38ceaf9SAlex Deucher 257280cf1a9SLyude Paul info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS, 258280cf1a9SLyude Paul NULL); 259d38ceaf9SAlex Deucher if (!info) { 260d38ceaf9SAlex Deucher err = -EIO; 261d38ceaf9SAlex Deucher goto out; 262d38ceaf9SAlex Deucher } 263d38ceaf9SAlex Deucher 264d38ceaf9SAlex Deucher size = *(u16 *) info->buffer.pointer; 265d38ceaf9SAlex Deucher if (size < 10) { 266d38ceaf9SAlex Deucher err = -EINVAL; 267d38ceaf9SAlex Deucher goto out; 268d38ceaf9SAlex Deucher } 269d38ceaf9SAlex Deucher 270d38ceaf9SAlex Deucher memset(¶ms, 0, sizeof(params)); 271d38ceaf9SAlex Deucher size = min(sizeof(params), size); 272d38ceaf9SAlex Deucher memcpy(¶ms, info->buffer.pointer, size); 273d38ceaf9SAlex Deucher 274d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n", 275d38ceaf9SAlex Deucher params.flags, params.valid_mask); 276d38ceaf9SAlex Deucher params.flags = params.flags & params.valid_mask; 277d38ceaf9SAlex Deucher 278d38ceaf9SAlex Deucher if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) { 279d38ceaf9SAlex Deucher n->enabled = false; 280d38ceaf9SAlex Deucher n->command_code = 0; 281d38ceaf9SAlex Deucher } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) { 282d38ceaf9SAlex Deucher n->enabled = true; 283d38ceaf9SAlex Deucher n->command_code = 0x81; 284d38ceaf9SAlex Deucher } else { 285d38ceaf9SAlex Deucher if (size < 11) { 286d38ceaf9SAlex Deucher err = -EINVAL; 287d38ceaf9SAlex Deucher goto out; 288d38ceaf9SAlex Deucher } 289d38ceaf9SAlex Deucher n->enabled = true; 290d38ceaf9SAlex Deucher n->command_code = params.command_code; 291d38ceaf9SAlex Deucher } 292d38ceaf9SAlex Deucher 293d38ceaf9SAlex Deucher out: 294d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n", 295d38ceaf9SAlex Deucher (n->enabled ? "enabled" : "disabled"), 296d38ceaf9SAlex Deucher n->command_code); 297d38ceaf9SAlex Deucher kfree(info); 298d38ceaf9SAlex Deucher return err; 299d38ceaf9SAlex Deucher } 300d38ceaf9SAlex Deucher 301d38ceaf9SAlex Deucher /** 302206bbafeSDavid Francis * amdgpu_atif_query_backlight_caps - get min and max backlight input signal 303206bbafeSDavid Francis * 304206bbafeSDavid Francis * @handle: acpi handle 305206bbafeSDavid Francis * 306206bbafeSDavid Francis * Execute the QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS ATIF function 307206bbafeSDavid Francis * to determine the acceptable range of backlight values 308206bbafeSDavid Francis * 309206bbafeSDavid Francis * Backlight_caps.caps_valid will be set to true if the query is successful 310206bbafeSDavid Francis * 311206bbafeSDavid Francis * The input signals are in range 0-255 312206bbafeSDavid Francis * 313206bbafeSDavid Francis * This function assumes the display with backlight is the first LCD 314206bbafeSDavid Francis * 315206bbafeSDavid Francis * Returns 0 on success, error on failure. 316206bbafeSDavid Francis */ 317206bbafeSDavid Francis static int amdgpu_atif_query_backlight_caps(struct amdgpu_atif *atif) 318206bbafeSDavid Francis { 319206bbafeSDavid Francis union acpi_object *info; 320206bbafeSDavid Francis struct atif_qbtc_output characteristics; 321206bbafeSDavid Francis struct atif_qbtc_arguments arguments; 322206bbafeSDavid Francis struct acpi_buffer params; 323206bbafeSDavid Francis size_t size; 324206bbafeSDavid Francis int err = 0; 325206bbafeSDavid Francis 326206bbafeSDavid Francis arguments.size = sizeof(arguments); 327206bbafeSDavid Francis arguments.requested_display = ATIF_QBTC_REQUEST_LCD1; 328206bbafeSDavid Francis 329206bbafeSDavid Francis params.length = sizeof(arguments); 330206bbafeSDavid Francis params.pointer = (void *)&arguments; 331206bbafeSDavid Francis 332206bbafeSDavid Francis info = amdgpu_atif_call(atif, 333206bbafeSDavid Francis ATIF_FUNCTION_QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS, 334206bbafeSDavid Francis ¶ms); 335206bbafeSDavid Francis if (!info) { 336206bbafeSDavid Francis err = -EIO; 337206bbafeSDavid Francis goto out; 338206bbafeSDavid Francis } 339206bbafeSDavid Francis 340206bbafeSDavid Francis size = *(u16 *) info->buffer.pointer; 341206bbafeSDavid Francis if (size < 10) { 342206bbafeSDavid Francis err = -EINVAL; 343206bbafeSDavid Francis goto out; 344206bbafeSDavid Francis } 345206bbafeSDavid Francis 346206bbafeSDavid Francis memset(&characteristics, 0, sizeof(characteristics)); 347206bbafeSDavid Francis size = min(sizeof(characteristics), size); 348206bbafeSDavid Francis memcpy(&characteristics, info->buffer.pointer, size); 349206bbafeSDavid Francis 350206bbafeSDavid Francis atif->backlight_caps.caps_valid = true; 351206bbafeSDavid Francis atif->backlight_caps.min_input_signal = 352206bbafeSDavid Francis characteristics.min_input_signal; 353206bbafeSDavid Francis atif->backlight_caps.max_input_signal = 354206bbafeSDavid Francis characteristics.max_input_signal; 355206bbafeSDavid Francis out: 356206bbafeSDavid Francis kfree(info); 357206bbafeSDavid Francis return err; 358206bbafeSDavid Francis } 359206bbafeSDavid Francis 360206bbafeSDavid Francis /** 361d38ceaf9SAlex Deucher * amdgpu_atif_get_sbios_requests - get requested sbios event 362d38ceaf9SAlex Deucher * 363d38ceaf9SAlex Deucher * @handle: acpi handle 364d38ceaf9SAlex Deucher * @req: atif sbios request struct 365d38ceaf9SAlex Deucher * 366d38ceaf9SAlex Deucher * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function 367d38ceaf9SAlex Deucher * to determine what requests the sbios is making to the driver 368d38ceaf9SAlex Deucher * (all asics). 369d38ceaf9SAlex Deucher * Returns 0 on success, error on failure. 370d38ceaf9SAlex Deucher */ 371280cf1a9SLyude Paul static int amdgpu_atif_get_sbios_requests(struct amdgpu_atif *atif, 372d38ceaf9SAlex Deucher struct atif_sbios_requests *req) 373d38ceaf9SAlex Deucher { 374d38ceaf9SAlex Deucher union acpi_object *info; 375d38ceaf9SAlex Deucher size_t size; 376d38ceaf9SAlex Deucher int count = 0; 377d38ceaf9SAlex Deucher 378280cf1a9SLyude Paul info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS, 379280cf1a9SLyude Paul NULL); 380d38ceaf9SAlex Deucher if (!info) 381d38ceaf9SAlex Deucher return -EIO; 382d38ceaf9SAlex Deucher 383d38ceaf9SAlex Deucher size = *(u16 *)info->buffer.pointer; 384d38ceaf9SAlex Deucher if (size < 0xd) { 385d38ceaf9SAlex Deucher count = -EINVAL; 386d38ceaf9SAlex Deucher goto out; 387d38ceaf9SAlex Deucher } 388d38ceaf9SAlex Deucher memset(req, 0, sizeof(*req)); 389d38ceaf9SAlex Deucher 390d38ceaf9SAlex Deucher size = min(sizeof(*req), size); 391d38ceaf9SAlex Deucher memcpy(req, info->buffer.pointer, size); 392d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending); 393d38ceaf9SAlex Deucher 394d38ceaf9SAlex Deucher count = hweight32(req->pending); 395d38ceaf9SAlex Deucher 396d38ceaf9SAlex Deucher out: 397d38ceaf9SAlex Deucher kfree(info); 398d38ceaf9SAlex Deucher return count; 399d38ceaf9SAlex Deucher } 400d38ceaf9SAlex Deucher 401d38ceaf9SAlex Deucher /** 402d38ceaf9SAlex Deucher * amdgpu_atif_handler - handle ATIF notify requests 403d38ceaf9SAlex Deucher * 404d38ceaf9SAlex Deucher * @adev: amdgpu_device pointer 405d38ceaf9SAlex Deucher * @event: atif sbios request struct 406d38ceaf9SAlex Deucher * 407d38ceaf9SAlex Deucher * Checks the acpi event and if it matches an atif event, 408d38ceaf9SAlex Deucher * handles it. 409582f58deSLyude Paul * 410582f58deSLyude Paul * Returns: 411582f58deSLyude Paul * NOTIFY_BAD or NOTIFY_DONE, depending on the event. 412d38ceaf9SAlex Deucher */ 413b7cecbe8SJean Delvare static int amdgpu_atif_handler(struct amdgpu_device *adev, 414d38ceaf9SAlex Deucher struct acpi_bus_event *event) 415d38ceaf9SAlex Deucher { 416102c16a0SLyude Paul struct amdgpu_atif *atif = adev->atif; 417d38ceaf9SAlex Deucher int count; 418d38ceaf9SAlex Deucher 419d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n", 420d38ceaf9SAlex Deucher event->device_class, event->type); 421d38ceaf9SAlex Deucher 422d38ceaf9SAlex Deucher if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0) 423d38ceaf9SAlex Deucher return NOTIFY_DONE; 424d38ceaf9SAlex Deucher 425582f58deSLyude Paul /* Is this actually our event? */ 426102c16a0SLyude Paul if (!atif || 427102c16a0SLyude Paul !atif->notification_cfg.enabled || 428582f58deSLyude Paul event->type != atif->notification_cfg.command_code) { 429582f58deSLyude Paul /* These events will generate keypresses otherwise */ 430582f58deSLyude Paul if (event->type == ACPI_VIDEO_NOTIFY_PROBE) 431582f58deSLyude Paul return NOTIFY_BAD; 432582f58deSLyude Paul else 433d38ceaf9SAlex Deucher return NOTIFY_DONE; 434582f58deSLyude Paul } 435d38ceaf9SAlex Deucher 4369e7204beSAlex Deucher if (atif->functions.sbios_requests) { 4379e7204beSAlex Deucher struct atif_sbios_requests req; 4389e7204beSAlex Deucher 439d38ceaf9SAlex Deucher /* Check pending SBIOS requests */ 440280cf1a9SLyude Paul count = amdgpu_atif_get_sbios_requests(atif, &req); 441d38ceaf9SAlex Deucher 442d38ceaf9SAlex Deucher if (count <= 0) 443582f58deSLyude Paul return NOTIFY_BAD; 444d38ceaf9SAlex Deucher 445d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count); 446d38ceaf9SAlex Deucher 4475b8eb0edSAlex Deucher /* todo: add DC handling */ 4485b8eb0edSAlex Deucher if ((req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) && 4495b8eb0edSAlex Deucher !amdgpu_device_has_dc_support(adev)) { 450d38ceaf9SAlex Deucher struct amdgpu_encoder *enc = atif->encoder_for_bl; 451d38ceaf9SAlex Deucher 452d38ceaf9SAlex Deucher if (enc) { 453d38ceaf9SAlex Deucher struct amdgpu_encoder_atom_dig *dig = enc->enc_priv; 454d38ceaf9SAlex Deucher 455d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("Changing brightness to %d\n", 456d38ceaf9SAlex Deucher req.backlight_level); 457d38ceaf9SAlex Deucher 458d38ceaf9SAlex Deucher amdgpu_display_backlight_set_level(adev, enc, req.backlight_level); 459d38ceaf9SAlex Deucher 460d38ceaf9SAlex Deucher #if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE) 461d38ceaf9SAlex Deucher backlight_force_update(dig->bl_dev, 462d38ceaf9SAlex Deucher BACKLIGHT_UPDATE_HOTKEY); 463d38ceaf9SAlex Deucher #endif 464d38ceaf9SAlex Deucher } 465d38ceaf9SAlex Deucher } 4661b0f568dSAlex Deucher if (req.pending & ATIF_DGPU_DISPLAY_EVENT) { 467*bdb1ccb0SAaron Liu if (adev->flags & AMD_IS_PX) { 4681b0f568dSAlex Deucher pm_runtime_get_sync(adev->ddev->dev); 4691b0f568dSAlex Deucher /* Just fire off a uevent and let userspace tell us what to do */ 4701b0f568dSAlex Deucher drm_helper_hpd_irq_event(adev->ddev); 4711b0f568dSAlex Deucher pm_runtime_mark_last_busy(adev->ddev->dev); 4721b0f568dSAlex Deucher pm_runtime_put_autosuspend(adev->ddev->dev); 4731b0f568dSAlex Deucher } 4741b0f568dSAlex Deucher } 475d38ceaf9SAlex Deucher /* TODO: check other events */ 4769e7204beSAlex Deucher } 477d38ceaf9SAlex Deucher 478d38ceaf9SAlex Deucher /* We've handled the event, stop the notifier chain. The ACPI interface 479d38ceaf9SAlex Deucher * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to 480d38ceaf9SAlex Deucher * userspace if the event was generated only to signal a SBIOS 481d38ceaf9SAlex Deucher * request. 482d38ceaf9SAlex Deucher */ 483d38ceaf9SAlex Deucher return NOTIFY_BAD; 484d38ceaf9SAlex Deucher } 485d38ceaf9SAlex Deucher 486d38ceaf9SAlex Deucher /* Call the ATCS method 487d38ceaf9SAlex Deucher */ 488d38ceaf9SAlex Deucher /** 489d38ceaf9SAlex Deucher * amdgpu_atcs_call - call an ATCS method 490d38ceaf9SAlex Deucher * 491d38ceaf9SAlex Deucher * @handle: acpi handle 492d38ceaf9SAlex Deucher * @function: the ATCS function to execute 493d38ceaf9SAlex Deucher * @params: ATCS function params 494d38ceaf9SAlex Deucher * 495d38ceaf9SAlex Deucher * Executes the requested ATCS function (all asics). 496d38ceaf9SAlex Deucher * Returns a pointer to the acpi output buffer. 497d38ceaf9SAlex Deucher */ 498d38ceaf9SAlex Deucher static union acpi_object *amdgpu_atcs_call(acpi_handle handle, int function, 499d38ceaf9SAlex Deucher struct acpi_buffer *params) 500d38ceaf9SAlex Deucher { 501d38ceaf9SAlex Deucher acpi_status status; 502d38ceaf9SAlex Deucher union acpi_object atcs_arg_elements[2]; 503d38ceaf9SAlex Deucher struct acpi_object_list atcs_arg; 504d38ceaf9SAlex Deucher struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 505d38ceaf9SAlex Deucher 506d38ceaf9SAlex Deucher atcs_arg.count = 2; 507d38ceaf9SAlex Deucher atcs_arg.pointer = &atcs_arg_elements[0]; 508d38ceaf9SAlex Deucher 509d38ceaf9SAlex Deucher atcs_arg_elements[0].type = ACPI_TYPE_INTEGER; 510d38ceaf9SAlex Deucher atcs_arg_elements[0].integer.value = function; 511d38ceaf9SAlex Deucher 512d38ceaf9SAlex Deucher if (params) { 513d38ceaf9SAlex Deucher atcs_arg_elements[1].type = ACPI_TYPE_BUFFER; 514d38ceaf9SAlex Deucher atcs_arg_elements[1].buffer.length = params->length; 515d38ceaf9SAlex Deucher atcs_arg_elements[1].buffer.pointer = params->pointer; 516d38ceaf9SAlex Deucher } else { 517d38ceaf9SAlex Deucher /* We need a second fake parameter */ 518d38ceaf9SAlex Deucher atcs_arg_elements[1].type = ACPI_TYPE_INTEGER; 519d38ceaf9SAlex Deucher atcs_arg_elements[1].integer.value = 0; 520d38ceaf9SAlex Deucher } 521d38ceaf9SAlex Deucher 522d38ceaf9SAlex Deucher status = acpi_evaluate_object(handle, "ATCS", &atcs_arg, &buffer); 523d38ceaf9SAlex Deucher 524d38ceaf9SAlex Deucher /* Fail only if calling the method fails and ATIF is supported */ 525d38ceaf9SAlex Deucher if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { 526d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n", 527d38ceaf9SAlex Deucher acpi_format_exception(status)); 528d38ceaf9SAlex Deucher kfree(buffer.pointer); 529d38ceaf9SAlex Deucher return NULL; 530d38ceaf9SAlex Deucher } 531d38ceaf9SAlex Deucher 532d38ceaf9SAlex Deucher return buffer.pointer; 533d38ceaf9SAlex Deucher } 534d38ceaf9SAlex Deucher 535d38ceaf9SAlex Deucher /** 536d38ceaf9SAlex Deucher * amdgpu_atcs_parse_functions - parse supported functions 537d38ceaf9SAlex Deucher * 538d38ceaf9SAlex Deucher * @f: supported functions struct 539d38ceaf9SAlex Deucher * @mask: supported functions mask from ATCS 540d38ceaf9SAlex Deucher * 541d38ceaf9SAlex Deucher * Use the supported functions mask from ATCS function 542d38ceaf9SAlex Deucher * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions 543d38ceaf9SAlex Deucher * are supported (all asics). 544d38ceaf9SAlex Deucher */ 545d38ceaf9SAlex Deucher static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask) 546d38ceaf9SAlex Deucher { 547d38ceaf9SAlex Deucher f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED; 548d38ceaf9SAlex Deucher f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED; 549d38ceaf9SAlex Deucher f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED; 550d38ceaf9SAlex Deucher f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED; 551d38ceaf9SAlex Deucher } 552d38ceaf9SAlex Deucher 553d38ceaf9SAlex Deucher /** 554d38ceaf9SAlex Deucher * amdgpu_atcs_verify_interface - verify ATCS 555d38ceaf9SAlex Deucher * 556d38ceaf9SAlex Deucher * @handle: acpi handle 557d38ceaf9SAlex Deucher * @atcs: amdgpu atcs struct 558d38ceaf9SAlex Deucher * 559d38ceaf9SAlex Deucher * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function 560d38ceaf9SAlex Deucher * to initialize ATCS and determine what features are supported 561d38ceaf9SAlex Deucher * (all asics). 562d38ceaf9SAlex Deucher * returns 0 on success, error on failure. 563d38ceaf9SAlex Deucher */ 564d38ceaf9SAlex Deucher static int amdgpu_atcs_verify_interface(acpi_handle handle, 565d38ceaf9SAlex Deucher struct amdgpu_atcs *atcs) 566d38ceaf9SAlex Deucher { 567d38ceaf9SAlex Deucher union acpi_object *info; 568d38ceaf9SAlex Deucher struct atcs_verify_interface output; 569d38ceaf9SAlex Deucher size_t size; 570d38ceaf9SAlex Deucher int err = 0; 571d38ceaf9SAlex Deucher 572d38ceaf9SAlex Deucher info = amdgpu_atcs_call(handle, ATCS_FUNCTION_VERIFY_INTERFACE, NULL); 573d38ceaf9SAlex Deucher if (!info) 574d38ceaf9SAlex Deucher return -EIO; 575d38ceaf9SAlex Deucher 576d38ceaf9SAlex Deucher memset(&output, 0, sizeof(output)); 577d38ceaf9SAlex Deucher 578d38ceaf9SAlex Deucher size = *(u16 *) info->buffer.pointer; 579d38ceaf9SAlex Deucher if (size < 8) { 580d38ceaf9SAlex Deucher DRM_INFO("ATCS buffer is too small: %zu\n", size); 581d38ceaf9SAlex Deucher err = -EINVAL; 582d38ceaf9SAlex Deucher goto out; 583d38ceaf9SAlex Deucher } 584d38ceaf9SAlex Deucher size = min(sizeof(output), size); 585d38ceaf9SAlex Deucher 586d38ceaf9SAlex Deucher memcpy(&output, info->buffer.pointer, size); 587d38ceaf9SAlex Deucher 588d38ceaf9SAlex Deucher /* TODO: check version? */ 589d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("ATCS version %u\n", output.version); 590d38ceaf9SAlex Deucher 591d38ceaf9SAlex Deucher amdgpu_atcs_parse_functions(&atcs->functions, output.function_bits); 592d38ceaf9SAlex Deucher 593d38ceaf9SAlex Deucher out: 594d38ceaf9SAlex Deucher kfree(info); 595d38ceaf9SAlex Deucher return err; 596d38ceaf9SAlex Deucher } 597d38ceaf9SAlex Deucher 598d38ceaf9SAlex Deucher /** 599d38ceaf9SAlex Deucher * amdgpu_acpi_is_pcie_performance_request_supported 600d38ceaf9SAlex Deucher * 601d38ceaf9SAlex Deucher * @adev: amdgpu_device pointer 602d38ceaf9SAlex Deucher * 603d38ceaf9SAlex Deucher * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods 604d38ceaf9SAlex Deucher * are supported (all asics). 605d38ceaf9SAlex Deucher * returns true if supported, false if not. 606d38ceaf9SAlex Deucher */ 607d38ceaf9SAlex Deucher bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev) 608d38ceaf9SAlex Deucher { 609d38ceaf9SAlex Deucher struct amdgpu_atcs *atcs = &adev->atcs; 610d38ceaf9SAlex Deucher 611d38ceaf9SAlex Deucher if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy) 612d38ceaf9SAlex Deucher return true; 613d38ceaf9SAlex Deucher 614d38ceaf9SAlex Deucher return false; 615d38ceaf9SAlex Deucher } 616d38ceaf9SAlex Deucher 617d38ceaf9SAlex Deucher /** 618d38ceaf9SAlex Deucher * amdgpu_acpi_pcie_notify_device_ready 619d38ceaf9SAlex Deucher * 620d38ceaf9SAlex Deucher * @adev: amdgpu_device pointer 621d38ceaf9SAlex Deucher * 622d38ceaf9SAlex Deucher * Executes the PCIE_DEVICE_READY_NOTIFICATION method 623d38ceaf9SAlex Deucher * (all asics). 624d38ceaf9SAlex Deucher * returns 0 on success, error on failure. 625d38ceaf9SAlex Deucher */ 626d38ceaf9SAlex Deucher int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev) 627d38ceaf9SAlex Deucher { 628d38ceaf9SAlex Deucher acpi_handle handle; 629d38ceaf9SAlex Deucher union acpi_object *info; 630d38ceaf9SAlex Deucher struct amdgpu_atcs *atcs = &adev->atcs; 631d38ceaf9SAlex Deucher 632d38ceaf9SAlex Deucher /* Get the device handle */ 633d38ceaf9SAlex Deucher handle = ACPI_HANDLE(&adev->pdev->dev); 634d38ceaf9SAlex Deucher if (!handle) 635d38ceaf9SAlex Deucher return -EINVAL; 636d38ceaf9SAlex Deucher 637d38ceaf9SAlex Deucher if (!atcs->functions.pcie_dev_rdy) 638d38ceaf9SAlex Deucher return -EINVAL; 639d38ceaf9SAlex Deucher 640d38ceaf9SAlex Deucher info = amdgpu_atcs_call(handle, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL); 641d38ceaf9SAlex Deucher if (!info) 642d38ceaf9SAlex Deucher return -EIO; 643d38ceaf9SAlex Deucher 644d38ceaf9SAlex Deucher kfree(info); 645d38ceaf9SAlex Deucher 646d38ceaf9SAlex Deucher return 0; 647d38ceaf9SAlex Deucher } 648d38ceaf9SAlex Deucher 649d38ceaf9SAlex Deucher /** 650d38ceaf9SAlex Deucher * amdgpu_acpi_pcie_performance_request 651d38ceaf9SAlex Deucher * 652d38ceaf9SAlex Deucher * @adev: amdgpu_device pointer 653d38ceaf9SAlex Deucher * @perf_req: requested perf level (pcie gen speed) 654d38ceaf9SAlex Deucher * @advertise: set advertise caps flag if set 655d38ceaf9SAlex Deucher * 656d38ceaf9SAlex Deucher * Executes the PCIE_PERFORMANCE_REQUEST method to 657d38ceaf9SAlex Deucher * change the pcie gen speed (all asics). 658d38ceaf9SAlex Deucher * returns 0 on success, error on failure. 659d38ceaf9SAlex Deucher */ 660d38ceaf9SAlex Deucher int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev, 661d38ceaf9SAlex Deucher u8 perf_req, bool advertise) 662d38ceaf9SAlex Deucher { 663d38ceaf9SAlex Deucher acpi_handle handle; 664d38ceaf9SAlex Deucher union acpi_object *info; 665d38ceaf9SAlex Deucher struct amdgpu_atcs *atcs = &adev->atcs; 666d38ceaf9SAlex Deucher struct atcs_pref_req_input atcs_input; 667d38ceaf9SAlex Deucher struct atcs_pref_req_output atcs_output; 668d38ceaf9SAlex Deucher struct acpi_buffer params; 669d38ceaf9SAlex Deucher size_t size; 670d38ceaf9SAlex Deucher u32 retry = 3; 671d38ceaf9SAlex Deucher 6721bced75fSRex Zhu if (amdgpu_acpi_pcie_notify_device_ready(adev)) 6731bced75fSRex Zhu return -EINVAL; 6741bced75fSRex Zhu 675d38ceaf9SAlex Deucher /* Get the device handle */ 676d38ceaf9SAlex Deucher handle = ACPI_HANDLE(&adev->pdev->dev); 677d38ceaf9SAlex Deucher if (!handle) 678d38ceaf9SAlex Deucher return -EINVAL; 679d38ceaf9SAlex Deucher 680d38ceaf9SAlex Deucher if (!atcs->functions.pcie_perf_req) 681d38ceaf9SAlex Deucher return -EINVAL; 682d38ceaf9SAlex Deucher 683d38ceaf9SAlex Deucher atcs_input.size = sizeof(struct atcs_pref_req_input); 684d38ceaf9SAlex Deucher /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */ 685d38ceaf9SAlex Deucher atcs_input.client_id = adev->pdev->devfn | (adev->pdev->bus->number << 8); 686d38ceaf9SAlex Deucher atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK; 687d38ceaf9SAlex Deucher atcs_input.flags = ATCS_WAIT_FOR_COMPLETION; 688d38ceaf9SAlex Deucher if (advertise) 689d38ceaf9SAlex Deucher atcs_input.flags |= ATCS_ADVERTISE_CAPS; 690d38ceaf9SAlex Deucher atcs_input.req_type = ATCS_PCIE_LINK_SPEED; 691d38ceaf9SAlex Deucher atcs_input.perf_req = perf_req; 692d38ceaf9SAlex Deucher 693d38ceaf9SAlex Deucher params.length = sizeof(struct atcs_pref_req_input); 694d38ceaf9SAlex Deucher params.pointer = &atcs_input; 695d38ceaf9SAlex Deucher 696d38ceaf9SAlex Deucher while (retry--) { 697d38ceaf9SAlex Deucher info = amdgpu_atcs_call(handle, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, ¶ms); 698d38ceaf9SAlex Deucher if (!info) 699d38ceaf9SAlex Deucher return -EIO; 700d38ceaf9SAlex Deucher 701d38ceaf9SAlex Deucher memset(&atcs_output, 0, sizeof(atcs_output)); 702d38ceaf9SAlex Deucher 703d38ceaf9SAlex Deucher size = *(u16 *) info->buffer.pointer; 704d38ceaf9SAlex Deucher if (size < 3) { 705d38ceaf9SAlex Deucher DRM_INFO("ATCS buffer is too small: %zu\n", size); 706d38ceaf9SAlex Deucher kfree(info); 707d38ceaf9SAlex Deucher return -EINVAL; 708d38ceaf9SAlex Deucher } 709d38ceaf9SAlex Deucher size = min(sizeof(atcs_output), size); 710d38ceaf9SAlex Deucher 711d38ceaf9SAlex Deucher memcpy(&atcs_output, info->buffer.pointer, size); 712d38ceaf9SAlex Deucher 713d38ceaf9SAlex Deucher kfree(info); 714d38ceaf9SAlex Deucher 715d38ceaf9SAlex Deucher switch (atcs_output.ret_val) { 716d38ceaf9SAlex Deucher case ATCS_REQUEST_REFUSED: 717d38ceaf9SAlex Deucher default: 718d38ceaf9SAlex Deucher return -EINVAL; 719d38ceaf9SAlex Deucher case ATCS_REQUEST_COMPLETE: 720d38ceaf9SAlex Deucher return 0; 721d38ceaf9SAlex Deucher case ATCS_REQUEST_IN_PROGRESS: 722d38ceaf9SAlex Deucher udelay(10); 723d38ceaf9SAlex Deucher break; 724d38ceaf9SAlex Deucher } 725d38ceaf9SAlex Deucher } 726d38ceaf9SAlex Deucher 727d38ceaf9SAlex Deucher return 0; 728d38ceaf9SAlex Deucher } 729d38ceaf9SAlex Deucher 730d38ceaf9SAlex Deucher /** 731d38ceaf9SAlex Deucher * amdgpu_acpi_event - handle notify events 732d38ceaf9SAlex Deucher * 733d38ceaf9SAlex Deucher * @nb: notifier block 734d38ceaf9SAlex Deucher * @val: val 735d38ceaf9SAlex Deucher * @data: acpi event 736d38ceaf9SAlex Deucher * 737d38ceaf9SAlex Deucher * Calls relevant amdgpu functions in response to various 738d38ceaf9SAlex Deucher * acpi events. 739d38ceaf9SAlex Deucher * Returns NOTIFY code 740d38ceaf9SAlex Deucher */ 741d38ceaf9SAlex Deucher static int amdgpu_acpi_event(struct notifier_block *nb, 742d38ceaf9SAlex Deucher unsigned long val, 743d38ceaf9SAlex Deucher void *data) 744d38ceaf9SAlex Deucher { 745d38ceaf9SAlex Deucher struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb); 746d38ceaf9SAlex Deucher struct acpi_bus_event *entry = (struct acpi_bus_event *)data; 747d38ceaf9SAlex Deucher 748d38ceaf9SAlex Deucher if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) { 749d38ceaf9SAlex Deucher if (power_supply_is_system_supplied() > 0) 750d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("pm: AC\n"); 751d38ceaf9SAlex Deucher else 752d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("pm: DC\n"); 753d38ceaf9SAlex Deucher 754d38ceaf9SAlex Deucher amdgpu_pm_acpi_event_handler(adev); 755d38ceaf9SAlex Deucher } 756d38ceaf9SAlex Deucher 757d38ceaf9SAlex Deucher /* Check for pending SBIOS requests */ 758d38ceaf9SAlex Deucher return amdgpu_atif_handler(adev, entry); 759d38ceaf9SAlex Deucher } 760d38ceaf9SAlex Deucher 761d38ceaf9SAlex Deucher /* Call all ACPI methods here */ 762d38ceaf9SAlex Deucher /** 763d38ceaf9SAlex Deucher * amdgpu_acpi_init - init driver acpi support 764d38ceaf9SAlex Deucher * 765d38ceaf9SAlex Deucher * @adev: amdgpu_device pointer 766d38ceaf9SAlex Deucher * 767d38ceaf9SAlex Deucher * Verifies the AMD ACPI interfaces and registers with the acpi 768d38ceaf9SAlex Deucher * notifier chain (all asics). 769d38ceaf9SAlex Deucher * Returns 0 on success, error on failure. 770d38ceaf9SAlex Deucher */ 771d38ceaf9SAlex Deucher int amdgpu_acpi_init(struct amdgpu_device *adev) 772d38ceaf9SAlex Deucher { 773280cf1a9SLyude Paul acpi_handle handle, atif_handle; 774102c16a0SLyude Paul struct amdgpu_atif *atif; 775d38ceaf9SAlex Deucher struct amdgpu_atcs *atcs = &adev->atcs; 776d38ceaf9SAlex Deucher int ret; 777d38ceaf9SAlex Deucher 778d38ceaf9SAlex Deucher /* Get the device handle */ 779d38ceaf9SAlex Deucher handle = ACPI_HANDLE(&adev->pdev->dev); 780d38ceaf9SAlex Deucher 781d38ceaf9SAlex Deucher if (!adev->bios || !handle) 782d38ceaf9SAlex Deucher return 0; 783d38ceaf9SAlex Deucher 784d38ceaf9SAlex Deucher /* Call the ATCS method */ 785d38ceaf9SAlex Deucher ret = amdgpu_atcs_verify_interface(handle, atcs); 786d38ceaf9SAlex Deucher if (ret) { 787d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("Call to ATCS verify_interface failed: %d\n", ret); 788d38ceaf9SAlex Deucher } 789d38ceaf9SAlex Deucher 790280cf1a9SLyude Paul /* Probe for ATIF, and initialize it if found */ 791280cf1a9SLyude Paul atif_handle = amdgpu_atif_probe_handle(handle); 792280cf1a9SLyude Paul if (!atif_handle) 793280cf1a9SLyude Paul goto out; 794280cf1a9SLyude Paul 795102c16a0SLyude Paul atif = kzalloc(sizeof(*atif), GFP_KERNEL); 796102c16a0SLyude Paul if (!atif) { 797102c16a0SLyude Paul DRM_WARN("Not enough memory to initialize ATIF\n"); 798102c16a0SLyude Paul goto out; 799102c16a0SLyude Paul } 800280cf1a9SLyude Paul atif->handle = atif_handle; 801102c16a0SLyude Paul 802280cf1a9SLyude Paul /* Call the ATIF method */ 803280cf1a9SLyude Paul ret = amdgpu_atif_verify_interface(atif); 804d38ceaf9SAlex Deucher if (ret) { 805d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("Call to ATIF verify_interface failed: %d\n", ret); 806102c16a0SLyude Paul kfree(atif); 807d38ceaf9SAlex Deucher goto out; 808d38ceaf9SAlex Deucher } 809102c16a0SLyude Paul adev->atif = atif; 810d38ceaf9SAlex Deucher 811d38ceaf9SAlex Deucher if (atif->notifications.brightness_change) { 812d38ceaf9SAlex Deucher struct drm_encoder *tmp; 813d38ceaf9SAlex Deucher 814d38ceaf9SAlex Deucher /* Find the encoder controlling the brightness */ 815d38ceaf9SAlex Deucher list_for_each_entry(tmp, &adev->ddev->mode_config.encoder_list, 816d38ceaf9SAlex Deucher head) { 817d38ceaf9SAlex Deucher struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp); 818d38ceaf9SAlex Deucher 819d38ceaf9SAlex Deucher if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) && 820d38ceaf9SAlex Deucher enc->enc_priv) { 821d38ceaf9SAlex Deucher struct amdgpu_encoder_atom_dig *dig = enc->enc_priv; 822d38ceaf9SAlex Deucher if (dig->bl_dev) { 823d38ceaf9SAlex Deucher atif->encoder_for_bl = enc; 824d38ceaf9SAlex Deucher break; 825d38ceaf9SAlex Deucher } 826d38ceaf9SAlex Deucher } 827d38ceaf9SAlex Deucher } 828d38ceaf9SAlex Deucher } 829d38ceaf9SAlex Deucher 830d38ceaf9SAlex Deucher if (atif->functions.sbios_requests && !atif->functions.system_params) { 831d38ceaf9SAlex Deucher /* XXX check this workraround, if sbios request function is 832d38ceaf9SAlex Deucher * present we have to see how it's configured in the system 833d38ceaf9SAlex Deucher * params 834d38ceaf9SAlex Deucher */ 835d38ceaf9SAlex Deucher atif->functions.system_params = true; 836d38ceaf9SAlex Deucher } 837d38ceaf9SAlex Deucher 838d38ceaf9SAlex Deucher if (atif->functions.system_params) { 839280cf1a9SLyude Paul ret = amdgpu_atif_get_notification_params(atif); 840d38ceaf9SAlex Deucher if (ret) { 841d38ceaf9SAlex Deucher DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n", 842d38ceaf9SAlex Deucher ret); 843d38ceaf9SAlex Deucher /* Disable notification */ 844d38ceaf9SAlex Deucher atif->notification_cfg.enabled = false; 845d38ceaf9SAlex Deucher } 846d38ceaf9SAlex Deucher } 847d38ceaf9SAlex Deucher 848206bbafeSDavid Francis if (atif->functions.query_backlight_transfer_characteristics) { 849206bbafeSDavid Francis ret = amdgpu_atif_query_backlight_caps(atif); 850206bbafeSDavid Francis if (ret) { 851206bbafeSDavid Francis DRM_DEBUG_DRIVER("Call to QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS failed: %d\n", 852206bbafeSDavid Francis ret); 853206bbafeSDavid Francis atif->backlight_caps.caps_valid = false; 854206bbafeSDavid Francis } 855206bbafeSDavid Francis } else { 856206bbafeSDavid Francis atif->backlight_caps.caps_valid = false; 857206bbafeSDavid Francis } 858206bbafeSDavid Francis 859d38ceaf9SAlex Deucher out: 860d38ceaf9SAlex Deucher adev->acpi_nb.notifier_call = amdgpu_acpi_event; 861d38ceaf9SAlex Deucher register_acpi_notifier(&adev->acpi_nb); 862d38ceaf9SAlex Deucher 863d38ceaf9SAlex Deucher return ret; 864d38ceaf9SAlex Deucher } 865d38ceaf9SAlex Deucher 866206bbafeSDavid Francis void amdgpu_acpi_get_backlight_caps(struct amdgpu_device *adev, 867206bbafeSDavid Francis struct amdgpu_dm_backlight_caps *caps) 868206bbafeSDavid Francis { 869206bbafeSDavid Francis if (!adev->atif) { 870206bbafeSDavid Francis caps->caps_valid = false; 871206bbafeSDavid Francis return; 872206bbafeSDavid Francis } 873206bbafeSDavid Francis caps->caps_valid = adev->atif->backlight_caps.caps_valid; 874206bbafeSDavid Francis caps->min_input_signal = adev->atif->backlight_caps.min_input_signal; 875206bbafeSDavid Francis caps->max_input_signal = adev->atif->backlight_caps.max_input_signal; 876206bbafeSDavid Francis } 877206bbafeSDavid Francis 878d38ceaf9SAlex Deucher /** 879d38ceaf9SAlex Deucher * amdgpu_acpi_fini - tear down driver acpi support 880d38ceaf9SAlex Deucher * 881d38ceaf9SAlex Deucher * @adev: amdgpu_device pointer 882d38ceaf9SAlex Deucher * 883d38ceaf9SAlex Deucher * Unregisters with the acpi notifier chain (all asics). 884d38ceaf9SAlex Deucher */ 885d38ceaf9SAlex Deucher void amdgpu_acpi_fini(struct amdgpu_device *adev) 886d38ceaf9SAlex Deucher { 887d38ceaf9SAlex Deucher unregister_acpi_notifier(&adev->acpi_nb); 888102c16a0SLyude Paul kfree(adev->atif); 889d38ceaf9SAlex Deucher } 890