/* * Copyright 2012 Advanced Micro Devices, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * */ #include <linux/pci.h>#include <linux/acpi.h>#include <linux/slab.h>#include <linux/power_supply.h>#include <linux/vga_switcheroo.h>#include <acpi/video.h>#include <drm/drmP.h>#include <drm/drm_crtc_helper.h>#include "amdgpu.h"#include "amdgpu_acpi.h"#include "atom.h" #define ACPI_AC_CLASS "ac_adapter" extern void amdgpu_pm_acpi_event_handler(struct amdgpu_device *adev); struct atif_verify_interface { u16 size; /* structure size in bytes (includes size field) */ u16 version; /* version */ u32 notification_mask; /* supported notifications mask */ u32 function_bits; /* supported functions bit vector */} __packed; struct atif_system_params { u16 size; /* structure size in bytes (includes size field) */ u32 valid_mask; /* valid flags mask */ u32 flags; /* flags */ u8 command_code; /* notify command code */} __packed; struct atif_sbios_requests { u16 size; /* structure size in bytes (includes size field) */ u32 pending; /* pending sbios requests */ u8 panel_exp_mode; /* panel expansion mode */ u8 thermal_gfx; /* thermal state: target gfx controller */ u8 thermal_state; /* thermal state: state id (0: exit state, non-0: state) */ u8 forced_power_gfx; /* forced power state: target gfx controller */ u8 forced_power_state; /* forced power state: state id */ u8 system_power_src; /* system power source */ u8 backlight_level; /* panel backlight level (0-255) */} __packed; #define ATIF_NOTIFY_MASK 0x3#define ATIF_NOTIFY_NONE 0#define ATIF_NOTIFY_81 1#define ATIF_NOTIFY_N 2 struct atcs_verify_interface { u16 size; /* structure size in bytes (includes size field) */ u16 version; /* version */ u32 function_bits; /* supported functions bit vector */} __packed; #define ATCS_VALID_FLAGS_MASK 0x3 struct atcs_pref_req_input { u16 size; /* structure size in bytes (includes size field) */ u16 client_id; /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */ u16 valid_flags_mask; /* valid flags mask */ u16 flags; /* flags */ u8 req_type; /* request type */ u8 perf_req; /* performance request */} __packed; struct atcs_pref_req_output { u16 size; /* structure size in bytes (includes size field) */ u8 ret_val; /* return value */} __packed; /* Call the ATIF method *//** * amdgpu_atif_call - call an ATIF method * * @handle: acpi handle * @function: the ATIF function to execute * @params: ATIF function params * * Executes the requested ATIF function (all asics). * Returns a pointer to the acpi output buffer. */static union acpi_object *amdgpu_atif_call(acpi_handle handle, int function, struct acpi_buffer *params){ acpi_status status; union acpi_object atif_arg_elements[2]; struct acpi_object_list atif_arg; struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; atif_arg.count = 2; atif_arg.pointer = &atif_arg_elements[0]; atif_arg_elements[0].type = ACPI_TYPE_INTEGER; atif_arg_elements[0].integer.value = function; if (params) { atif_arg_elements[1].type = ACPI_TYPE_BUFFER; atif_arg_elements[1].buffer.length = params->length; atif_arg_elements[1].buffer.pointer = params->pointer; } else { /* We need a second fake parameter */ atif_arg_elements[1].type = ACPI_TYPE_INTEGER; atif_arg_elements[1].integer.value = 0; } status = acpi_evaluate_object(handle, "ATIF", &atif_arg, &buffer); /* Fail only if calling the method fails and ATIF is supported */ if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n", acpi_format_exception(status)); kfree(buffer.pointer); return NULL; } return buffer.pointer;} /** * amdgpu_atif_parse_notification - parse supported notifications * * @n: supported notifications struct * @mask: supported notifications mask from ATIF * * Use the supported notifications mask from ATIF function * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications * are supported (all asics). */static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask){ n->display_switch = mask & ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED; n->expansion_mode_change = mask & ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED; 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->display_conf_change = mask & ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED; n->px_gfx_switch = mask & ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED; n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED; n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_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->select_active_disp = mask & ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED; f->lid_state = mask & ATIF_GET_LID_STATE_SUPPORTED; f->get_tv_standard = mask & ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED; f->set_tv_standard = mask & ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED; f->get_panel_expansion_mode = mask & ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED; f->set_panel_expansion_mode = mask & ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED; f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED; f->graphics_device_types = mask & ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED;} /** * amdgpu_atif_verify_interface - verify ATIF * * @handle: acpi handle * @atif: amdgpu atif struct * * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function * to initialize ATIF and determine what features are supported * (all asics). * returns 0 on success, error on failure. */static int amdgpu_atif_verify_interface(acpi_handle handle, struct amdgpu_atif *atif){ union acpi_object *info; struct atif_verify_interface output; size_t size; int err = 0; info = amdgpu_atif_call(handle, ATIF_FUNCTION_VERIFY_INTERFACE, NULL); if (!info) return -EIO; memset(&output, 0, sizeof(output)); size = *(u16 *) info->buffer.pointer; if (size < 12) { DRM_INFO("ATIF buffer is too small: %zu\n", size); err = -EINVAL; goto out; } size = min(sizeof(output), size); memcpy(&output, info->buffer.pointer, size); /* TODO: check version? */ DRM_DEBUG_DRIVER("ATIF version %u\n", output.version); amdgpu_atif_parse_notification(&atif->notifications, output.notification_mask); amdgpu_atif_parse_functions(&atif->functions, output.function_bits); out: kfree(info); return err;} /** * amdgpu_atif_get_notification_params - determine notify configuration * * @handle: acpi handle * @n: atif notification configuration struct * * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function * to determine if a notifier is used and if so which one * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n) * where n is specified in the result if a notifier is used. * Returns 0 on success, error on failure. */static int amdgpu_atif_get_notification_params(acpi_handle handle, struct amdgpu_atif_notification_cfg *n){ union acpi_object *info; struct atif_system_params params; size_t size; int err = 0; info = amdgpu_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS, NULL); if (!info) { err = -EIO; goto out; } size = *(u16 *) info->buffer.pointer; if (size < 10) { err = -EINVAL; goto out; } memset(¶ms, 0, sizeof(params)); size = min(sizeof(params), size); memcpy(¶ms, info->buffer.pointer, size); DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n", params.flags, params.valid_mask); params.flags = params.flags & params.valid_mask; if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) { n->enabled = false; n->command_code = 0; } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) { n->enabled = true; n->command_code = 0x81; } else { if (size < 11) { err = -EINVAL; goto out; } n->enabled = true; n->command_code = params.command_code; } out: DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n", (n->enabled ? "enabled" : "disabled"), n->command_code); kfree(info); return err;} /** * amdgpu_atif_get_sbios_requests - get requested sbios event * * @handle: 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(acpi_handle handle, struct atif_sbios_requests *req){ union acpi_object *info; size_t size; int count = 0; info = amdgpu_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS, NULL); if (!info) return -EIO; size = *(u16 *)info->buffer.pointer; if (size < 0xd) { count = -EINVAL; goto out; } memset(req, 0, sizeof(*req)); size = min(sizeof(*req), size); memcpy(req, info->buffer.pointer, size); DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending); count = hweight32(req->pending); out: kfree(info); return count;} /** * amdgpu_atif_handler - handle ATIF notify requests * * @adev: amdgpu_device pointer * @event: atif sbios request struct * * Checks the acpi event and if it matches an atif event, * handles it. * Returns NOTIFY code */int amdgpu_atif_handler(struct amdgpu_device *adev, struct acpi_bus_event *event){ struct amdgpu_atif *atif = &adev->atif; struct atif_sbios_requests req; acpi_handle handle; 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; if (!atif->notification_cfg.enabled || event->type != atif->notification_cfg.command_code) /* Not our event */ return NOTIFY_DONE; /* Check pending SBIOS requests */ handle = ACPI_HANDLE(&adev->pdev->dev); count = amdgpu_atif_get_sbios_requests(handle, &req); if (count <= 0) return NOTIFY_DONE; DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count); if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) { struct amdgpu_encoder *enc = atif->encoder_for_bl; if (enc) { struct amdgpu_encoder_atom_dig *dig = enc->enc_priv; DRM_DEBUG_DRIVER("Changing brightness to %d\n", req.backlight_level); amdgpu_display_backlight_set_level(adev, enc, req.backlight_level); #if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE) backlight_force_update(dig->bl_dev, BACKLIGHT_UPDATE_HOTKEY);#endif } } /* TODO: check other events */ /* We've handled the event, stop the notifier chain. The ACPI interface * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to * userspace if the event was generated only to signal a SBIOS * request. */ return NOTIFY_BAD;} /* Call the ATCS method *//** * amdgpu_atcs_call - call an ATCS method * * @handle: acpi handle * @function: the ATCS function to execute * @params: ATCS function params * * Executes the requested ATCS function (all asics). * Returns a pointer to the acpi output buffer. */static union acpi_object *amdgpu_atcs_call(acpi_handle handle, int function, struct acpi_buffer *params){ acpi_status status; union acpi_object atcs_arg_elements[2]; struct acpi_object_list atcs_arg; struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; atcs_arg.count = 2; atcs_arg.pointer = &atcs_arg_elements[0]; atcs_arg_elements[0].type = ACPI_TYPE_INTEGER; atcs_arg_elements[0].integer.value = function; if (params) { atcs_arg_elements[1].type = ACPI_TYPE_BUFFER; atcs_arg_elements[1].buffer.length = params->length; atcs_arg_elements[1].buffer.pointer = params->pointer; } else { /* We need a second fake parameter */ atcs_arg_elements[1].type = ACPI_TYPE_INTEGER; atcs_arg_elements[1].integer.value = 0; } status = acpi_evaluate_object(handle, "ATCS", &atcs_arg, &buffer); /* Fail only if calling the method fails and ATIF is supported */ if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n", acpi_format_exception(status)); kfree(buffer.pointer); return NULL; } return buffer.pointer;} /** * amdgpu_atcs_parse_functions - parse supported functions * * @f: supported functions struct * @mask: supported functions mask from ATCS * * Use the supported functions mask from ATCS function * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions * are supported (all asics). */static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask){ f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED; f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED; f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED; f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED;} /** * amdgpu_atcs_verify_interface - verify ATCS * * @handle: acpi handle * @atcs: amdgpu atcs struct * * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function * to initialize ATCS and determine what features are supported * (all asics). * returns 0 on success, error on failure. */static int amdgpu_atcs_verify_interface(acpi_handle handle, struct amdgpu_atcs *atcs){ union acpi_object *info; struct atcs_verify_interface output; size_t size; int err = 0; info = amdgpu_atcs_call(handle, ATCS_FUNCTION_VERIFY_INTERFACE, NULL); if (!info) return -EIO; memset(&output, 0, sizeof(output)); size = *(u16 *) info->buffer.pointer; if (size < 8) { DRM_INFO("ATCS buffer is too small: %zu\n", size); err = -EINVAL; goto out; }Lines 1–500 of 768. 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/* * Copyright 2012 Advanced Micro Devices, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * */ #include <linux/pci.h> #include <linux/acpi.h> #include <linux/slab.h> #include <linux/power_supply.h> #include <linux/vga_switcheroo.h> #include <acpi/video.h> #include <drm/drmP.h> #include <drm/drm_crtc_helper.h> #include "amdgpu.h" #include "amdgpu_acpi.h" #include "atom.h" #define ACPI_AC_CLASS "ac_adapter" extern void amdgpu_pm_acpi_event_handler(struct amdgpu_device *adev); struct atif_verify_interface { u16 size; /* structure size in bytes (includes size field) */ u16 version; /* version */ u32 notification_mask; /* supported notifications mask */ u32 function_bits; /* supported functions bit vector */ } __packed; struct atif_system_params { u16 size; /* structure size in bytes (includes size field) */ u32 valid_mask; /* valid flags mask */ u32 flags; /* flags */ u8 command_code; /* notify command code */ } __packed; struct atif_sbios_requests { u16 size; /* structure size in bytes (includes size field) */ u32 pending; /* pending sbios requests */ u8 panel_exp_mode; /* panel expansion mode */ u8 thermal_gfx; /* thermal state: target gfx controller */ u8 thermal_state; /* thermal state: state id (0: exit state, non-0: state) */ u8 forced_power_gfx; /* forced power state: target gfx controller */ u8 forced_power_state; /* forced power state: state id */ u8 system_power_src; /* system power source */ u8 backlight_level; /* panel backlight level (0-255) */ } __packed; #define ATIF_NOTIFY_MASK 0x3 #define ATIF_NOTIFY_NONE 0 #define ATIF_NOTIFY_81 1 #define ATIF_NOTIFY_N 2 struct atcs_verify_interface { u16 size; /* structure size in bytes (includes size field) */ u16 version; /* version */ u32 function_bits; /* supported functions bit vector */ } __packed; #define ATCS_VALID_FLAGS_MASK 0x3 struct atcs_pref_req_input { u16 size; /* structure size in bytes (includes size field) */ u16 client_id; /* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */ u16 valid_flags_mask; /* valid flags mask */ u16 flags; /* flags */ u8 req_type; /* request type */ u8 perf_req; /* performance request */ } __packed; struct atcs_pref_req_output { u16 size; /* structure size in bytes (includes size field) */ u8 ret_val; /* return value */ } __packed; /* Call the ATIF method */ /** * amdgpu_atif_call - call an ATIF method * * @handle: acpi handle * @function: the ATIF function to execute * @params: ATIF function params * * Executes the requested ATIF function (all asics). * Returns a pointer to the acpi output buffer. */ static union acpi_object *amdgpu_atif_call(acpi_handle handle, int function, struct acpi_buffer *params) { acpi_status status; union acpi_object atif_arg_elements[2]; struct acpi_object_list atif_arg; struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; atif_arg.count = 2; atif_arg.pointer = &atif_arg_elements[0]; atif_arg_elements[0].type = ACPI_TYPE_INTEGER; atif_arg_elements[0].integer.value = function; if (params) { atif_arg_elements[1].type = ACPI_TYPE_BUFFER; atif_arg_elements[1].buffer.length = params->length; atif_arg_elements[1].buffer.pointer = params->pointer; } else { /* We need a second fake parameter */ atif_arg_elements[1].type = ACPI_TYPE_INTEGER; atif_arg_elements[1].integer.value = 0; } status = acpi_evaluate_object(handle, "ATIF", &atif_arg, &buffer); /* Fail only if calling the method fails and ATIF is supported */ if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n", acpi_format_exception(status)); kfree(buffer.pointer); return NULL; } return buffer.pointer; } /** * amdgpu_atif_parse_notification - parse supported notifications * * @n: supported notifications struct * @mask: supported notifications mask from ATIF * * Use the supported notifications mask from ATIF function * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications * are supported (all asics). */ static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask) { n->display_switch = mask & ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED; n->expansion_mode_change = mask & ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED; 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->display_conf_change = mask & ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED; n->px_gfx_switch = mask & ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED; n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED; n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_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->select_active_disp = mask & ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED; f->lid_state = mask & ATIF_GET_LID_STATE_SUPPORTED; f->get_tv_standard = mask & ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED; f->set_tv_standard = mask & ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED; f->get_panel_expansion_mode = mask & ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED; f->set_panel_expansion_mode = mask & ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED; f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED; f->graphics_device_types = mask & ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED; } /** * amdgpu_atif_verify_interface - verify ATIF * * @handle: acpi handle * @atif: amdgpu atif struct * * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function * to initialize ATIF and determine what features are supported * (all asics). * returns 0 on success, error on failure. */ static int amdgpu_atif_verify_interface(acpi_handle handle, struct amdgpu_atif *atif) { union acpi_object *info; struct atif_verify_interface output; size_t size; int err = 0; info = amdgpu_atif_call(handle, ATIF_FUNCTION_VERIFY_INTERFACE, NULL); if (!info) return -EIO; memset(&output, 0, sizeof(output)); size = *(u16 *) info->buffer.pointer; if (size < 12) { DRM_INFO("ATIF buffer is too small: %zu\n", size); err = -EINVAL; goto out; } size = min(sizeof(output), size); memcpy(&output, info->buffer.pointer, size); /* TODO: check version? */ DRM_DEBUG_DRIVER("ATIF version %u\n", output.version); amdgpu_atif_parse_notification(&atif->notifications, output.notification_mask); amdgpu_atif_parse_functions(&atif->functions, output.function_bits); out: kfree(info); return err; } /** * amdgpu_atif_get_notification_params - determine notify configuration * * @handle: acpi handle * @n: atif notification configuration struct * * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function * to determine if a notifier is used and if so which one * (all asics). This is either Notify(VGA, 0x81) or Notify(VGA, n) * where n is specified in the result if a notifier is used. * Returns 0 on success, error on failure. */ static int amdgpu_atif_get_notification_params(acpi_handle handle, struct amdgpu_atif_notification_cfg *n) { union acpi_object *info; struct atif_system_params params; size_t size; int err = 0; info = amdgpu_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS, NULL); if (!info) { err = -EIO; goto out; } size = *(u16 *) info->buffer.pointer; if (size < 10) { err = -EINVAL; goto out; } memset(¶ms, 0, sizeof(params)); size = min(sizeof(params), size); memcpy(¶ms, info->buffer.pointer, size); DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n", params.flags, params.valid_mask); params.flags = params.flags & params.valid_mask; if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) { n->enabled = false; n->command_code = 0; } else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) { n->enabled = true; n->command_code = 0x81; } else { if (size < 11) { err = -EINVAL; goto out; } n->enabled = true; n->command_code = params.command_code; } out: DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n", (n->enabled ? "enabled" : "disabled"), n->command_code); kfree(info); return err; } /** * amdgpu_atif_get_sbios_requests - get requested sbios event * * @handle: 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(acpi_handle handle, struct atif_sbios_requests *req) { union acpi_object *info; size_t size; int count = 0; info = amdgpu_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS, NULL); if (!info) return -EIO; size = *(u16 *)info->buffer.pointer; if (size < 0xd) { count = -EINVAL; goto out; } memset(req, 0, sizeof(*req)); size = min(sizeof(*req), size); memcpy(req, info->buffer.pointer, size); DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending); count = hweight32(req->pending); out: kfree(info); return count; } /** * amdgpu_atif_handler - handle ATIF notify requests * * @adev: amdgpu_device pointer * @event: atif sbios request struct * * Checks the acpi event and if it matches an atif event, * handles it. * Returns NOTIFY code */ int amdgpu_atif_handler(struct amdgpu_device *adev, struct acpi_bus_event *event) { struct amdgpu_atif *atif = &adev->atif; struct atif_sbios_requests req; acpi_handle handle; 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; if (!atif->notification_cfg.enabled || event->type != atif->notification_cfg.command_code) /* Not our event */ return NOTIFY_DONE; /* Check pending SBIOS requests */ handle = ACPI_HANDLE(&adev->pdev->dev); count = amdgpu_atif_get_sbios_requests(handle, &req); if (count <= 0) return NOTIFY_DONE; DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count); if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) { struct amdgpu_encoder *enc = atif->encoder_for_bl; if (enc) { struct amdgpu_encoder_atom_dig *dig = enc->enc_priv; DRM_DEBUG_DRIVER("Changing brightness to %d\n", req.backlight_level); amdgpu_display_backlight_set_level(adev, enc, req.backlight_level); #if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE) backlight_force_update(dig->bl_dev, BACKLIGHT_UPDATE_HOTKEY); #endif } } /* TODO: check other events */ /* We've handled the event, stop the notifier chain. The ACPI interface * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to * userspace if the event was generated only to signal a SBIOS * request. */ return NOTIFY_BAD; } /* Call the ATCS method */ /** * amdgpu_atcs_call - call an ATCS method * * @handle: acpi handle * @function: the ATCS function to execute * @params: ATCS function params * * Executes the requested ATCS function (all asics). * Returns a pointer to the acpi output buffer. */ static union acpi_object *amdgpu_atcs_call(acpi_handle handle, int function, struct acpi_buffer *params) { acpi_status status; union acpi_object atcs_arg_elements[2]; struct acpi_object_list atcs_arg; struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; atcs_arg.count = 2; atcs_arg.pointer = &atcs_arg_elements[0]; atcs_arg_elements[0].type = ACPI_TYPE_INTEGER; atcs_arg_elements[0].integer.value = function; if (params) { atcs_arg_elements[1].type = ACPI_TYPE_BUFFER; atcs_arg_elements[1].buffer.length = params->length; atcs_arg_elements[1].buffer.pointer = params->pointer; } else { /* We need a second fake parameter */ atcs_arg_elements[1].type = ACPI_TYPE_INTEGER; atcs_arg_elements[1].integer.value = 0; } status = acpi_evaluate_object(handle, "ATCS", &atcs_arg, &buffer); /* Fail only if calling the method fails and ATIF is supported */ if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n", acpi_format_exception(status)); kfree(buffer.pointer); return NULL; } return buffer.pointer; } /** * amdgpu_atcs_parse_functions - parse supported functions * * @f: supported functions struct * @mask: supported functions mask from ATCS * * Use the supported functions mask from ATCS function * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions * are supported (all asics). */ static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask) { f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED; f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED; f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED; f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED; } /** * amdgpu_atcs_verify_interface - verify ATCS * * @handle: acpi handle * @atcs: amdgpu atcs struct * * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function * to initialize ATCS and determine what features are supported * (all asics). * returns 0 on success, error on failure. */ static int amdgpu_atcs_verify_interface(acpi_handle handle, struct amdgpu_atcs *atcs) { union acpi_object *info; struct atcs_verify_interface output; size_t size; int err = 0; info = amdgpu_atcs_call(handle, ATCS_FUNCTION_VERIFY_INTERFACE, NULL); if (!info) return -EIO; memset(&output, 0, sizeof(output)); size = *(u16 *) info->buffer.pointer; if (size < 8) { DRM_INFO("ATCS buffer is too small: %zu\n", size); err = -EINVAL; goto out; }