Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1111 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
new file mode 100644
index 000000000..e32bd9908
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
@@ -0,0 +1,1111 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright 2012 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#include <linux/pci.h>
+#include <linux/acpi.h>
+#include <linux/slab.h>
+#include <linux/power_supply.h>
+#include <linux/pm_runtime.h>
+#include <linux/suspend.h>
+#include <acpi/video.h>
+#include <acpi/actbl.h>
+
+#include <drm/drm_crtc_helper.h>
+#include "amdgpu.h"
+#include "amdgpu_pm.h"
+#include "amdgpu_display.h"
+#include "amd_acpi.h"
+#include "atom.h"
+
+struct amdgpu_atif_notification_cfg {
+	bool enabled;
+	int command_code;
+};
+
+struct amdgpu_atif_notifications {
+	bool thermal_state;
+	bool forced_power_state;
+	bool system_power_state;
+	bool brightness_change;
+	bool dgpu_display_event;
+	bool gpu_package_power_limit;
+};
+
+struct amdgpu_atif_functions {
+	bool system_params;
+	bool sbios_requests;
+	bool temperature_change;
+	bool query_backlight_transfer_characteristics;
+	bool ready_to_undock;
+	bool external_gpu_information;
+};
+
+struct amdgpu_atif {
+	acpi_handle handle;
+
+	struct amdgpu_atif_notifications notifications;
+	struct amdgpu_atif_functions functions;
+	struct amdgpu_atif_notification_cfg notification_cfg;
+	struct backlight_device *bd;
+	struct amdgpu_dm_backlight_caps backlight_caps;
+};
+
+struct amdgpu_atcs_functions {
+	bool get_ext_state;
+	bool pcie_perf_req;
+	bool pcie_dev_rdy;
+	bool pcie_bus_width;
+	bool power_shift_control;
+};
+
+struct amdgpu_atcs {
+	acpi_handle handle;
+
+	struct amdgpu_atcs_functions functions;
+};
+
+static struct amdgpu_acpi_priv {
+	struct amdgpu_atif atif;
+	struct amdgpu_atcs atcs;
+} amdgpu_acpi_priv;
+
+/* Call the ATIF method
+ */
+/**
+ * amdgpu_atif_call - call an ATIF method
+ *
+ * @atif: atif structure
+ * @function: the ATIF function to execute
+ * @params: ATIF function params
+ *
+ * Executes the requested ATIF function (all asics).
+ * Returns a pointer to the acpi output buffer.
+ */
+static union acpi_object *amdgpu_atif_call(struct amdgpu_atif *atif,
+					   int function,
+					   struct acpi_buffer *params)
+{
+	acpi_status status;
+	union acpi_object atif_arg_elements[2];
+	struct acpi_object_list atif_arg;
+	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+
+	atif_arg.count = 2;
+	atif_arg.pointer = &atif_arg_elements[0];
+
+	atif_arg_elements[0].type = ACPI_TYPE_INTEGER;
+	atif_arg_elements[0].integer.value = function;
+
+	if (params) {
+		atif_arg_elements[1].type = ACPI_TYPE_BUFFER;
+		atif_arg_elements[1].buffer.length = params->length;
+		atif_arg_elements[1].buffer.pointer = params->pointer;
+	} else {
+		/* We need a second fake parameter */
+		atif_arg_elements[1].type = ACPI_TYPE_INTEGER;
+		atif_arg_elements[1].integer.value = 0;
+	}
+
+	status = acpi_evaluate_object(atif->handle, NULL, &atif_arg,
+				      &buffer);
+
+	/* Fail only if calling the method fails and ATIF is supported */
+	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+		DRM_DEBUG_DRIVER("failed to evaluate ATIF got %s\n",
+				 acpi_format_exception(status));
+		kfree(buffer.pointer);
+		return NULL;
+	}
+
+	return buffer.pointer;
+}
+
+/**
+ * amdgpu_atif_parse_notification - parse supported notifications
+ *
+ * @n: supported notifications struct
+ * @mask: supported notifications mask from ATIF
+ *
+ * Use the supported notifications mask from ATIF function
+ * ATIF_FUNCTION_VERIFY_INTERFACE to determine what notifications
+ * are supported (all asics).
+ */
+static void amdgpu_atif_parse_notification(struct amdgpu_atif_notifications *n, u32 mask)
+{
+	n->thermal_state = mask & ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED;
+	n->forced_power_state = mask & ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED;
+	n->system_power_state = mask & ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED;
+	n->brightness_change = mask & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED;
+	n->dgpu_display_event = mask & ATIF_DGPU_DISPLAY_EVENT_SUPPORTED;
+	n->gpu_package_power_limit = mask & ATIF_GPU_PACKAGE_POWER_LIMIT_REQUEST_SUPPORTED;
+}
+
+/**
+ * amdgpu_atif_parse_functions - parse supported functions
+ *
+ * @f: supported functions struct
+ * @mask: supported functions mask from ATIF
+ *
+ * Use the supported functions mask from ATIF function
+ * ATIF_FUNCTION_VERIFY_INTERFACE to determine what functions
+ * are supported (all asics).
+ */
+static void amdgpu_atif_parse_functions(struct amdgpu_atif_functions *f, u32 mask)
+{
+	f->system_params = mask & ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED;
+	f->sbios_requests = mask & ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED;
+	f->temperature_change = mask & ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED;
+	f->query_backlight_transfer_characteristics =
+		mask & ATIF_QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS_SUPPORTED;
+	f->ready_to_undock = mask & ATIF_READY_TO_UNDOCK_NOTIFICATION_SUPPORTED;
+	f->external_gpu_information = mask & ATIF_GET_EXTERNAL_GPU_INFORMATION_SUPPORTED;
+}
+
+/**
+ * amdgpu_atif_verify_interface - verify ATIF
+ *
+ * @atif: amdgpu atif struct
+ *
+ * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function
+ * to initialize ATIF and determine what features are supported
+ * (all asics).
+ * returns 0 on success, error on failure.
+ */
+static int amdgpu_atif_verify_interface(struct amdgpu_atif *atif)
+{
+	union acpi_object *info;
+	struct atif_verify_interface output;
+	size_t size;
+	int err = 0;
+
+	info = amdgpu_atif_call(atif, ATIF_FUNCTION_VERIFY_INTERFACE, NULL);
+	if (!info)
+		return -EIO;
+
+	memset(&output, 0, sizeof(output));
+
+	size = *(u16 *) info->buffer.pointer;
+	if (size < 12) {
+		DRM_INFO("ATIF buffer is too small: %zu\n", size);
+		err = -EINVAL;
+		goto out;
+	}
+	size = min(sizeof(output), size);
+
+	memcpy(&output, info->buffer.pointer, size);
+
+	/* TODO: check version? */
+	DRM_DEBUG_DRIVER("ATIF version %u\n", output.version);
+
+	amdgpu_atif_parse_notification(&atif->notifications, output.notification_mask);
+	amdgpu_atif_parse_functions(&atif->functions, output.function_bits);
+
+out:
+	kfree(info);
+	return err;
+}
+
+/**
+ * amdgpu_atif_get_notification_params - determine notify configuration
+ *
+ * @atif: acpi handle
+ *
+ * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function
+ * to determine if a notifier is used and if so which one
+ * (all asics).  This is either Notify(VGA, 0x81) or Notify(VGA, n)
+ * where n is specified in the result if a notifier is used.
+ * Returns 0 on success, error on failure.
+ */
+static int amdgpu_atif_get_notification_params(struct amdgpu_atif *atif)
+{
+	union acpi_object *info;
+	struct amdgpu_atif_notification_cfg *n = &atif->notification_cfg;
+	struct atif_system_params params;
+	size_t size;
+	int err = 0;
+
+	info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_PARAMETERS,
+				NULL);
+	if (!info) {
+		err = -EIO;
+		goto out;
+	}
+
+	size = *(u16 *) info->buffer.pointer;
+	if (size < 10) {
+		err = -EINVAL;
+		goto out;
+	}
+
+	memset(&params, 0, sizeof(params));
+	size = min(sizeof(params), size);
+	memcpy(&params, info->buffer.pointer, size);
+
+	DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n",
+			params.flags, params.valid_mask);
+	params.flags = params.flags & params.valid_mask;
+
+	if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) {
+		n->enabled = false;
+		n->command_code = 0;
+	} else if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_81) {
+		n->enabled = true;
+		n->command_code = 0x81;
+	} else {
+		if (size < 11) {
+			err = -EINVAL;
+			goto out;
+		}
+		n->enabled = true;
+		n->command_code = params.command_code;
+	}
+
+out:
+	DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n",
+			(n->enabled ? "enabled" : "disabled"),
+			n->command_code);
+	kfree(info);
+	return err;
+}
+
+/**
+ * amdgpu_atif_query_backlight_caps - get min and max backlight input signal
+ *
+ * @atif: acpi handle
+ *
+ * Execute the QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS ATIF function
+ * to determine the acceptable range of backlight values
+ *
+ * Backlight_caps.caps_valid will be set to true if the query is successful
+ *
+ * The input signals are in range 0-255
+ *
+ * This function assumes the display with backlight is the first LCD
+ *
+ * Returns 0 on success, error on failure.
+ */
+static int amdgpu_atif_query_backlight_caps(struct amdgpu_atif *atif)
+{
+	union acpi_object *info;
+	struct atif_qbtc_output characteristics;
+	struct atif_qbtc_arguments arguments;
+	struct acpi_buffer params;
+	size_t size;
+	int err = 0;
+
+	arguments.size = sizeof(arguments);
+	arguments.requested_display = ATIF_QBTC_REQUEST_LCD1;
+
+	params.length = sizeof(arguments);
+	params.pointer = (void *)&arguments;
+
+	info = amdgpu_atif_call(atif,
+		ATIF_FUNCTION_QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS,
+		&params);
+	if (!info) {
+		err = -EIO;
+		goto out;
+	}
+
+	size = *(u16 *) info->buffer.pointer;
+	if (size < 10) {
+		err = -EINVAL;
+		goto out;
+	}
+
+	memset(&characteristics, 0, sizeof(characteristics));
+	size = min(sizeof(characteristics), size);
+	memcpy(&characteristics, info->buffer.pointer, size);
+
+	atif->backlight_caps.caps_valid = true;
+	atif->backlight_caps.min_input_signal =
+			characteristics.min_input_signal;
+	atif->backlight_caps.max_input_signal =
+			characteristics.max_input_signal;
+out:
+	kfree(info);
+	return err;
+}
+
+/**
+ * amdgpu_atif_get_sbios_requests - get requested sbios event
+ *
+ * @atif: acpi handle
+ * @req: atif sbios request struct
+ *
+ * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function
+ * to determine what requests the sbios is making to the driver
+ * (all asics).
+ * Returns 0 on success, error on failure.
+ */
+static int amdgpu_atif_get_sbios_requests(struct amdgpu_atif *atif,
+					  struct atif_sbios_requests *req)
+{
+	union acpi_object *info;
+	size_t size;
+	int count = 0;
+
+	info = amdgpu_atif_call(atif, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS,
+				NULL);
+	if (!info)
+		return -EIO;
+
+	size = *(u16 *)info->buffer.pointer;
+	if (size < 0xd) {
+		count = -EINVAL;
+		goto out;
+	}
+	memset(req, 0, sizeof(*req));
+
+	size = min(sizeof(*req), size);
+	memcpy(req, info->buffer.pointer, size);
+	DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending);
+
+	count = hweight32(req->pending);
+
+out:
+	kfree(info);
+	return count;
+}
+
+/**
+ * amdgpu_atif_handler - handle ATIF notify requests
+ *
+ * @adev: amdgpu_device pointer
+ * @event: atif sbios request struct
+ *
+ * Checks the acpi event and if it matches an atif event,
+ * handles it.
+ *
+ * Returns:
+ * NOTIFY_BAD or NOTIFY_DONE, depending on the event.
+ */
+static int amdgpu_atif_handler(struct amdgpu_device *adev,
+			       struct acpi_bus_event *event)
+{
+	struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
+	int count;
+
+	DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n",
+			event->device_class, event->type);
+
+	if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
+		return NOTIFY_DONE;
+
+	/* Is this actually our event? */
+	if (!atif->notification_cfg.enabled ||
+	    event->type != atif->notification_cfg.command_code) {
+		/* These events will generate keypresses otherwise */
+		if (event->type == ACPI_VIDEO_NOTIFY_PROBE)
+			return NOTIFY_BAD;
+		else
+			return NOTIFY_DONE;
+	}
+
+	if (atif->functions.sbios_requests) {
+		struct atif_sbios_requests req;
+
+		/* Check pending SBIOS requests */
+		count = amdgpu_atif_get_sbios_requests(atif, &req);
+
+		if (count <= 0)
+			return NOTIFY_BAD;
+
+		DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);
+
+		if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) {
+			if (atif->bd) {
+				DRM_DEBUG_DRIVER("Changing brightness to %d\n",
+						 req.backlight_level);
+				/*
+				 * XXX backlight_device_set_brightness() is
+				 * hardwired to post BACKLIGHT_UPDATE_SYSFS.
+				 * It probably should accept 'reason' parameter.
+				 */
+				backlight_device_set_brightness(atif->bd, req.backlight_level);
+			}
+		}
+
+		if (req.pending & ATIF_DGPU_DISPLAY_EVENT) {
+			if (adev->flags & AMD_IS_PX) {
+				pm_runtime_get_sync(adev_to_drm(adev)->dev);
+				/* Just fire off a uevent and let userspace tell us what to do */
+				drm_helper_hpd_irq_event(adev_to_drm(adev));
+				pm_runtime_mark_last_busy(adev_to_drm(adev)->dev);
+				pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);
+			}
+		}
+		/* TODO: check other events */
+	}
+
+	/* We've handled the event, stop the notifier chain. The ACPI interface
+	 * overloads ACPI_VIDEO_NOTIFY_PROBE, we don't want to send that to
+	 * userspace if the event was generated only to signal a SBIOS
+	 * request.
+	 */
+	return NOTIFY_BAD;
+}
+
+/* Call the ATCS method
+ */
+/**
+ * amdgpu_atcs_call - call an ATCS method
+ *
+ * @atcs: atcs structure
+ * @function: the ATCS function to execute
+ * @params: ATCS function params
+ *
+ * Executes the requested ATCS function (all asics).
+ * Returns a pointer to the acpi output buffer.
+ */
+static union acpi_object *amdgpu_atcs_call(struct amdgpu_atcs *atcs,
+					   int function,
+					   struct acpi_buffer *params)
+{
+	acpi_status status;
+	union acpi_object atcs_arg_elements[2];
+	struct acpi_object_list atcs_arg;
+	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+
+	atcs_arg.count = 2;
+	atcs_arg.pointer = &atcs_arg_elements[0];
+
+	atcs_arg_elements[0].type = ACPI_TYPE_INTEGER;
+	atcs_arg_elements[0].integer.value = function;
+
+	if (params) {
+		atcs_arg_elements[1].type = ACPI_TYPE_BUFFER;
+		atcs_arg_elements[1].buffer.length = params->length;
+		atcs_arg_elements[1].buffer.pointer = params->pointer;
+	} else {
+		/* We need a second fake parameter */
+		atcs_arg_elements[1].type = ACPI_TYPE_INTEGER;
+		atcs_arg_elements[1].integer.value = 0;
+	}
+
+	status = acpi_evaluate_object(atcs->handle, NULL, &atcs_arg, &buffer);
+
+	/* Fail only if calling the method fails and ATIF is supported */
+	if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+		DRM_DEBUG_DRIVER("failed to evaluate ATCS got %s\n",
+				 acpi_format_exception(status));
+		kfree(buffer.pointer);
+		return NULL;
+	}
+
+	return buffer.pointer;
+}
+
+/**
+ * amdgpu_atcs_parse_functions - parse supported functions
+ *
+ * @f: supported functions struct
+ * @mask: supported functions mask from ATCS
+ *
+ * Use the supported functions mask from ATCS function
+ * ATCS_FUNCTION_VERIFY_INTERFACE to determine what functions
+ * are supported (all asics).
+ */
+static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mask)
+{
+	f->get_ext_state = mask & ATCS_GET_EXTERNAL_STATE_SUPPORTED;
+	f->pcie_perf_req = mask & ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED;
+	f->pcie_dev_rdy = mask & ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED;
+	f->pcie_bus_width = mask & ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED;
+	f->power_shift_control = mask & ATCS_SET_POWER_SHIFT_CONTROL_SUPPORTED;
+}
+
+/**
+ * amdgpu_atcs_verify_interface - verify ATCS
+ *
+ * @atcs: amdgpu atcs struct
+ *
+ * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function
+ * to initialize ATCS and determine what features are supported
+ * (all asics).
+ * returns 0 on success, error on failure.
+ */
+static int amdgpu_atcs_verify_interface(struct amdgpu_atcs *atcs)
+{
+	union acpi_object *info;
+	struct atcs_verify_interface output;
+	size_t size;
+	int err = 0;
+
+	info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
+	if (!info)
+		return -EIO;
+
+	memset(&output, 0, sizeof(output));
+
+	size = *(u16 *) info->buffer.pointer;
+	if (size < 8) {
+		DRM_INFO("ATCS buffer is too small: %zu\n", size);
+		err = -EINVAL;
+		goto out;
+	}
+	size = min(sizeof(output), size);
+
+	memcpy(&output, info->buffer.pointer, size);
+
+	/* TODO: check version? */
+	DRM_DEBUG_DRIVER("ATCS version %u\n", output.version);
+
+	amdgpu_atcs_parse_functions(&atcs->functions, output.function_bits);
+
+out:
+	kfree(info);
+	return err;
+}
+
+/**
+ * amdgpu_acpi_is_pcie_performance_request_supported
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Check if the ATCS pcie_perf_req and pcie_dev_rdy methods
+ * are supported (all asics).
+ * returns true if supported, false if not.
+ */
+bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev)
+{
+	struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
+
+	if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy)
+		return true;
+
+	return false;
+}
+
+/**
+ * amdgpu_acpi_is_power_shift_control_supported
+ *
+ * Check if the ATCS power shift control method
+ * is supported.
+ * returns true if supported, false if not.
+ */
+bool amdgpu_acpi_is_power_shift_control_supported(void)
+{
+	return amdgpu_acpi_priv.atcs.functions.power_shift_control;
+}
+
+/**
+ * amdgpu_acpi_pcie_notify_device_ready
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Executes the PCIE_DEVICE_READY_NOTIFICATION method
+ * (all asics).
+ * returns 0 on success, error on failure.
+ */
+int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev)
+{
+	union acpi_object *info;
+	struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
+
+	if (!atcs->functions.pcie_dev_rdy)
+		return -EINVAL;
+
+	info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL);
+	if (!info)
+		return -EIO;
+
+	kfree(info);
+
+	return 0;
+}
+
+/**
+ * amdgpu_acpi_pcie_performance_request
+ *
+ * @adev: amdgpu_device pointer
+ * @perf_req: requested perf level (pcie gen speed)
+ * @advertise: set advertise caps flag if set
+ *
+ * Executes the PCIE_PERFORMANCE_REQUEST method to
+ * change the pcie gen speed (all asics).
+ * returns 0 on success, error on failure.
+ */
+int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev,
+					 u8 perf_req, bool advertise)
+{
+	union acpi_object *info;
+	struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
+	struct atcs_pref_req_input atcs_input;
+	struct atcs_pref_req_output atcs_output;
+	struct acpi_buffer params;
+	size_t size;
+	u32 retry = 3;
+
+	if (amdgpu_acpi_pcie_notify_device_ready(adev))
+		return -EINVAL;
+
+	if (!atcs->functions.pcie_perf_req)
+		return -EINVAL;
+
+	atcs_input.size = sizeof(struct atcs_pref_req_input);
+	/* client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
+	atcs_input.client_id = adev->pdev->devfn | (adev->pdev->bus->number << 8);
+	atcs_input.valid_flags_mask = ATCS_VALID_FLAGS_MASK;
+	atcs_input.flags = ATCS_WAIT_FOR_COMPLETION;
+	if (advertise)
+		atcs_input.flags |= ATCS_ADVERTISE_CAPS;
+	atcs_input.req_type = ATCS_PCIE_LINK_SPEED;
+	atcs_input.perf_req = perf_req;
+
+	params.length = sizeof(struct atcs_pref_req_input);
+	params.pointer = &atcs_input;
+
+	while (retry--) {
+		info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, &params);
+		if (!info)
+			return -EIO;
+
+		memset(&atcs_output, 0, sizeof(atcs_output));
+
+		size = *(u16 *) info->buffer.pointer;
+		if (size < 3) {
+			DRM_INFO("ATCS buffer is too small: %zu\n", size);
+			kfree(info);
+			return -EINVAL;
+		}
+		size = min(sizeof(atcs_output), size);
+
+		memcpy(&atcs_output, info->buffer.pointer, size);
+
+		kfree(info);
+
+		switch (atcs_output.ret_val) {
+		case ATCS_REQUEST_REFUSED:
+		default:
+			return -EINVAL;
+		case ATCS_REQUEST_COMPLETE:
+			return 0;
+		case ATCS_REQUEST_IN_PROGRESS:
+			udelay(10);
+			break;
+		}
+	}
+
+	return 0;
+}
+
+/**
+ * amdgpu_acpi_power_shift_control
+ *
+ * @adev: amdgpu_device pointer
+ * @dev_state: device acpi state
+ * @drv_state: driver state
+ *
+ * Executes the POWER_SHIFT_CONTROL method to
+ * communicate current dGPU device state and
+ * driver state to APU/SBIOS.
+ * returns 0 on success, error on failure.
+ */
+int amdgpu_acpi_power_shift_control(struct amdgpu_device *adev,
+				    u8 dev_state, bool drv_state)
+{
+	union acpi_object *info;
+	struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
+	struct atcs_pwr_shift_input atcs_input;
+	struct acpi_buffer params;
+
+	if (!amdgpu_acpi_is_power_shift_control_supported())
+		return -EINVAL;
+
+	atcs_input.size = sizeof(struct atcs_pwr_shift_input);
+	/* dGPU id (bit 2-0: func num, 7-3: dev num, 15-8: bus num) */
+	atcs_input.dgpu_id = adev->pdev->devfn | (adev->pdev->bus->number << 8);
+	atcs_input.dev_acpi_state = dev_state;
+	atcs_input.drv_state = drv_state;
+
+	params.length = sizeof(struct atcs_pwr_shift_input);
+	params.pointer = &atcs_input;
+
+	info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_POWER_SHIFT_CONTROL, &params);
+	if (!info) {
+		DRM_ERROR("ATCS PSC update failed\n");
+		return -EIO;
+	}
+
+	return 0;
+}
+
+/**
+ * amdgpu_acpi_smart_shift_update - update dGPU device state to SBIOS
+ *
+ * @dev: drm_device pointer
+ * @ss_state: current smart shift event
+ *
+ * returns 0 on success,
+ * otherwise return error number.
+ */
+int amdgpu_acpi_smart_shift_update(struct drm_device *dev, enum amdgpu_ss ss_state)
+{
+	struct amdgpu_device *adev = drm_to_adev(dev);
+	int r;
+
+	if (!amdgpu_device_supports_smart_shift(dev))
+		return 0;
+
+	switch (ss_state) {
+	/* SBIOS trigger “stop”, “enable” and “start” at D0, Driver Operational.
+	 * SBIOS trigger “stop” at D3, Driver Not Operational.
+	 * SBIOS trigger “stop” and “disable” at D0, Driver NOT operational.
+	 */
+	case AMDGPU_SS_DRV_LOAD:
+		r = amdgpu_acpi_power_shift_control(adev,
+						    AMDGPU_ATCS_PSC_DEV_STATE_D0,
+						    AMDGPU_ATCS_PSC_DRV_STATE_OPR);
+		break;
+	case AMDGPU_SS_DEV_D0:
+		r = amdgpu_acpi_power_shift_control(adev,
+						    AMDGPU_ATCS_PSC_DEV_STATE_D0,
+						    AMDGPU_ATCS_PSC_DRV_STATE_OPR);
+		break;
+	case AMDGPU_SS_DEV_D3:
+		r = amdgpu_acpi_power_shift_control(adev,
+						    AMDGPU_ATCS_PSC_DEV_STATE_D3_HOT,
+						    AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
+		break;
+	case AMDGPU_SS_DRV_UNLOAD:
+		r = amdgpu_acpi_power_shift_control(adev,
+						    AMDGPU_ATCS_PSC_DEV_STATE_D0,
+						    AMDGPU_ATCS_PSC_DRV_STATE_NOT_OPR);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return r;
+}
+
+/**
+ * amdgpu_acpi_event - handle notify events
+ *
+ * @nb: notifier block
+ * @val: val
+ * @data: acpi event
+ *
+ * Calls relevant amdgpu functions in response to various
+ * acpi events.
+ * Returns NOTIFY code
+ */
+static int amdgpu_acpi_event(struct notifier_block *nb,
+			     unsigned long val,
+			     void *data)
+{
+	struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb);
+	struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
+
+	if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
+		if (power_supply_is_system_supplied() > 0)
+			DRM_DEBUG_DRIVER("pm: AC\n");
+		else
+			DRM_DEBUG_DRIVER("pm: DC\n");
+
+		amdgpu_pm_acpi_event_handler(adev);
+	}
+
+	/* Check for pending SBIOS requests */
+	return amdgpu_atif_handler(adev, entry);
+}
+
+/* Call all ACPI methods here */
+/**
+ * amdgpu_acpi_init - init driver acpi support
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Verifies the AMD ACPI interfaces and registers with the acpi
+ * notifier chain (all asics).
+ * Returns 0 on success, error on failure.
+ */
+int amdgpu_acpi_init(struct amdgpu_device *adev)
+{
+	struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
+
+	if (atif->notifications.brightness_change) {
+		if (amdgpu_device_has_dc_support(adev)) {
+#if defined(CONFIG_DRM_AMD_DC)
+			struct amdgpu_display_manager *dm = &adev->dm;
+
+			if (dm->backlight_dev[0])
+				atif->bd = dm->backlight_dev[0];
+#endif
+		} else {
+			struct drm_encoder *tmp;
+
+			/* Find the encoder controlling the brightness */
+			list_for_each_entry(tmp, &adev_to_drm(adev)->mode_config.encoder_list,
+					    head) {
+				struct amdgpu_encoder *enc = to_amdgpu_encoder(tmp);
+
+				if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
+				    enc->enc_priv) {
+					struct amdgpu_encoder_atom_dig *dig = enc->enc_priv;
+
+					if (dig->bl_dev) {
+						atif->bd = dig->bl_dev;
+						break;
+					}
+				}
+			}
+		}
+	}
+	adev->acpi_nb.notifier_call = amdgpu_acpi_event;
+	register_acpi_notifier(&adev->acpi_nb);
+
+	return 0;
+}
+
+void amdgpu_acpi_get_backlight_caps(struct amdgpu_dm_backlight_caps *caps)
+{
+	struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
+
+	caps->caps_valid = atif->backlight_caps.caps_valid;
+	caps->min_input_signal = atif->backlight_caps.min_input_signal;
+	caps->max_input_signal = atif->backlight_caps.max_input_signal;
+}
+
+/**
+ * amdgpu_acpi_fini - tear down driver acpi support
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Unregisters with the acpi notifier chain (all asics).
+ */
+void amdgpu_acpi_fini(struct amdgpu_device *adev)
+{
+	unregister_acpi_notifier(&adev->acpi_nb);
+}
+
+/**
+ * amdgpu_atif_pci_probe_handle - look up the ATIF handle
+ *
+ * @pdev: pci device
+ *
+ * Look up the ATIF handles (all asics).
+ * Returns true if the handle is found, false if not.
+ */
+static bool amdgpu_atif_pci_probe_handle(struct pci_dev *pdev)
+{
+	char acpi_method_name[255] = { 0 };
+	struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
+	acpi_handle dhandle, atif_handle;
+	acpi_status status;
+	int ret;
+
+	dhandle = ACPI_HANDLE(&pdev->dev);
+	if (!dhandle)
+		return false;
+
+	status = acpi_get_handle(dhandle, "ATIF", &atif_handle);
+	if (ACPI_FAILURE(status))
+		return false;
+
+	amdgpu_acpi_priv.atif.handle = atif_handle;
+	acpi_get_name(amdgpu_acpi_priv.atif.handle, ACPI_FULL_PATHNAME, &buffer);
+	DRM_DEBUG_DRIVER("Found ATIF handle %s\n", acpi_method_name);
+	ret = amdgpu_atif_verify_interface(&amdgpu_acpi_priv.atif);
+	if (ret) {
+		amdgpu_acpi_priv.atif.handle = 0;
+		return false;
+	}
+	return true;
+}
+
+/**
+ * amdgpu_atcs_pci_probe_handle - look up the ATCS handle
+ *
+ * @pdev: pci device
+ *
+ * Look up the ATCS handles (all asics).
+ * Returns true if the handle is found, false if not.
+ */
+static bool amdgpu_atcs_pci_probe_handle(struct pci_dev *pdev)
+{
+	char acpi_method_name[255] = { 0 };
+	struct acpi_buffer buffer = { sizeof(acpi_method_name), acpi_method_name };
+	acpi_handle dhandle, atcs_handle;
+	acpi_status status;
+	int ret;
+
+	dhandle = ACPI_HANDLE(&pdev->dev);
+	if (!dhandle)
+		return false;
+
+	status = acpi_get_handle(dhandle, "ATCS", &atcs_handle);
+	if (ACPI_FAILURE(status))
+		return false;
+
+	amdgpu_acpi_priv.atcs.handle = atcs_handle;
+	acpi_get_name(amdgpu_acpi_priv.atcs.handle, ACPI_FULL_PATHNAME, &buffer);
+	DRM_DEBUG_DRIVER("Found ATCS handle %s\n", acpi_method_name);
+	ret = amdgpu_atcs_verify_interface(&amdgpu_acpi_priv.atcs);
+	if (ret) {
+		amdgpu_acpi_priv.atcs.handle = 0;
+		return false;
+	}
+	return true;
+}
+
+
+/**
+ * amdgpu_acpi_should_gpu_reset
+ *
+ * @adev: amdgpu_device_pointer
+ *
+ * returns true if should reset GPU, false if not
+ */
+bool amdgpu_acpi_should_gpu_reset(struct amdgpu_device *adev)
+{
+	if ((adev->flags & AMD_IS_APU) &&
+	    adev->gfx.imu.funcs) /* Not need to do mode2 reset for IMU enabled APUs */
+		return false;
+
+	if ((adev->flags & AMD_IS_APU) &&
+	    amdgpu_acpi_is_s3_active(adev))
+		return false;
+
+	if (amdgpu_sriov_vf(adev))
+		return false;
+
+#if IS_ENABLED(CONFIG_SUSPEND)
+	return pm_suspend_target_state != PM_SUSPEND_TO_IDLE;
+#else
+	return true;
+#endif
+}
+
+/*
+ * amdgpu_acpi_detect - detect ACPI ATIF/ATCS methods
+ *
+ * Check if we have the ATIF/ATCS methods and populate
+ * the structures in the driver.
+ */
+void amdgpu_acpi_detect(void)
+{
+	struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
+	struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
+	struct pci_dev *pdev = NULL;
+	int ret;
+
+	while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
+		if (!atif->handle)
+			amdgpu_atif_pci_probe_handle(pdev);
+		if (!atcs->handle)
+			amdgpu_atcs_pci_probe_handle(pdev);
+	}
+
+	while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_OTHER << 8, pdev)) != NULL) {
+		if (!atif->handle)
+			amdgpu_atif_pci_probe_handle(pdev);
+		if (!atcs->handle)
+			amdgpu_atcs_pci_probe_handle(pdev);
+	}
+
+	if (atif->functions.sbios_requests && !atif->functions.system_params) {
+		/* XXX check this workraround, if sbios request function is
+		 * present we have to see how it's configured in the system
+		 * params
+		 */
+		atif->functions.system_params = true;
+	}
+
+	if (atif->functions.system_params) {
+		ret = amdgpu_atif_get_notification_params(atif);
+		if (ret) {
+			DRM_DEBUG_DRIVER("Call to GET_SYSTEM_PARAMS failed: %d\n",
+					ret);
+			/* Disable notification */
+			atif->notification_cfg.enabled = false;
+		}
+	}
+
+	if (atif->functions.query_backlight_transfer_characteristics) {
+		ret = amdgpu_atif_query_backlight_caps(atif);
+		if (ret) {
+			DRM_DEBUG_DRIVER("Call to QUERY_BACKLIGHT_TRANSFER_CHARACTERISTICS failed: %d\n",
+					ret);
+			atif->backlight_caps.caps_valid = false;
+		}
+	} else {
+		atif->backlight_caps.caps_valid = false;
+	}
+}
+
+#if IS_ENABLED(CONFIG_SUSPEND)
+/**
+ * amdgpu_acpi_is_s3_active
+ *
+ * @adev: amdgpu_device_pointer
+ *
+ * returns true if supported, false if not.
+ */
+bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev)
+{
+	return !(adev->flags & AMD_IS_APU) ||
+		(pm_suspend_target_state == PM_SUSPEND_MEM);
+}
+
+/**
+ * amdgpu_acpi_is_s0ix_active
+ *
+ * @adev: amdgpu_device_pointer
+ *
+ * returns true if supported, false if not.
+ */
+bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev)
+{
+	if (!(adev->flags & AMD_IS_APU) ||
+	    (pm_suspend_target_state != PM_SUSPEND_TO_IDLE))
+		return false;
+
+	if (adev->asic_type < CHIP_RAVEN)
+		return false;
+
+	/*
+	 * If ACPI_FADT_LOW_POWER_S0 is not set in the FADT, it is generally
+	 * risky to do any special firmware-related preparations for entering
+	 * S0ix even though the system is suspending to idle, so return false
+	 * in that case.
+	 */
+	if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) {
+		dev_warn_once(adev->dev,
+			      "Power consumption will be higher as BIOS has not been configured for suspend-to-idle.\n"
+			      "To use suspend-to-idle change the sleep mode in BIOS setup.\n");
+		return false;
+	}
+
+#if !IS_ENABLED(CONFIG_AMD_PMC)
+	dev_warn_once(adev->dev,
+		      "Power consumption will be higher as the kernel has not been compiled with CONFIG_AMD_PMC.\n");
+	return false;
+#else
+	return true;
+#endif /* CONFIG_AMD_PMC */
+}
+
+#endif /* CONFIG_SUSPEND */