1 files changed, 267 insertions, 131 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
index 2e9b16fb3fcd..84a1b4bc9bb4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
@@ -71,12 +71,31 @@ struct amdgpu_atif {
 	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
  *
- * @handle: acpi handle
+ * @atif: atif structure
  * @function: the ATIF function to execute
  * @params: ATIF function params
  *
@@ -166,7 +185,6 @@ static void amdgpu_atif_parse_functions(struct amdgpu_atif_functions *f, u32 mas
 /**
  * amdgpu_atif_verify_interface - verify ATIF
  *
- * @handle: acpi handle
  * @atif: amdgpu atif struct
  *
  * Execute the ATIF_FUNCTION_VERIFY_INTERFACE ATIF function
@@ -208,40 +226,10 @@ out:
 	return err;
 }
 
-static acpi_handle amdgpu_atif_probe_handle(acpi_handle dhandle)
-{
-	acpi_handle handle = NULL;
-	char acpi_method_name[255] = { 0 };
-	struct acpi_buffer buffer = { sizeof(acpi_method_name), acpi_method_name };
-	acpi_status status;
-
-	/* For PX/HG systems, ATIF and ATPX are in the iGPU's namespace, on dGPU only
-	 * systems, ATIF is in the dGPU's namespace.
-	 */
-	status = acpi_get_handle(dhandle, "ATIF", &handle);
-	if (ACPI_SUCCESS(status))
-		goto out;
-
-	if (amdgpu_has_atpx()) {
-		status = acpi_get_handle(amdgpu_atpx_get_dhandle(), "ATIF",
-					 &handle);
-		if (ACPI_SUCCESS(status))
-			goto out;
-	}
-
-	DRM_DEBUG_DRIVER("No ATIF handle found\n");
-	return NULL;
-out:
-	acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
-	DRM_DEBUG_DRIVER("Found ATIF handle %s\n", acpi_method_name);
-	return handle;
-}
-
 /**
  * amdgpu_atif_get_notification_params - determine notify configuration
  *
- * @handle: acpi handle
- * @n: atif notification configuration struct
+ * @atif: acpi handle
  *
  * Execute the ATIF_FUNCTION_GET_SYSTEM_PARAMETERS ATIF function
  * to determine if a notifier is used and if so which one
@@ -304,7 +292,7 @@ out:
 /**
  * amdgpu_atif_query_backlight_caps - get min and max backlight input signal
  *
- * @handle: acpi handle
+ * @atif: acpi handle
  *
  * Execute the QUERY_BRIGHTNESS_TRANSFER_CHARACTERISTICS ATIF function
  * to determine the acceptable range of backlight values
@@ -363,7 +351,7 @@ out:
 /**
  * amdgpu_atif_get_sbios_requests - get requested sbios event
  *
- * @handle: acpi handle
+ * @atif: acpi handle
  * @req: atif sbios request struct
  *
  * Execute the ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS ATIF function
@@ -416,7 +404,7 @@ out:
 static int amdgpu_atif_handler(struct amdgpu_device *adev,
 			       struct acpi_bus_event *event)
 {
-	struct amdgpu_atif *atif = adev->atif;
+	struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
 	int count;
 
 	DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n",
@@ -426,8 +414,7 @@ static int amdgpu_atif_handler(struct amdgpu_device *adev,
 		return NOTIFY_DONE;
 
 	/* Is this actually our event? */
-	if (!atif ||
-	    !atif->notification_cfg.enabled ||
+	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)
@@ -487,14 +474,15 @@ static int amdgpu_atif_handler(struct amdgpu_device *adev,
 /**
  * amdgpu_atcs_call - call an ATCS method
  *
- * @handle: acpi handle
+ * @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(acpi_handle handle, int function,
+static union acpi_object *amdgpu_atcs_call(struct amdgpu_atcs *atcs,
+					   int function,
 					   struct acpi_buffer *params)
 {
 	acpi_status status;
@@ -518,7 +506,7 @@ static union acpi_object *amdgpu_atcs_call(acpi_handle handle, int function,
 		atcs_arg_elements[1].integer.value = 0;
 	}
 
-	status = acpi_evaluate_object(handle, "ATCS", &atcs_arg, &buffer);
+	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) {
@@ -547,12 +535,12 @@ static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mas
 	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
  *
- * @handle: acpi handle
  * @atcs: amdgpu atcs struct
  *
  * Execute the ATCS_FUNCTION_VERIFY_INTERFACE ATCS function
@@ -560,15 +548,14 @@ static void amdgpu_atcs_parse_functions(struct amdgpu_atcs_functions *f, u32 mas
  * (all asics).
  * returns 0 on success, error on failure.
  */
-static int amdgpu_atcs_verify_interface(acpi_handle handle,
-					struct amdgpu_atcs *atcs)
+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(handle, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
+	info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_VERIFY_INTERFACE, NULL);
 	if (!info)
 		return -EIO;
 
@@ -605,7 +592,7 @@ out:
  */
 bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *adev)
 {
-	struct amdgpu_atcs *atcs = &adev->atcs;
+	struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
 
 	if (atcs->functions.pcie_perf_req && atcs->functions.pcie_dev_rdy)
 		return true;
@@ -614,6 +601,18 @@ bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *ade
 }
 
 /**
+ * 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
@@ -624,19 +623,13 @@ bool amdgpu_acpi_is_pcie_performance_request_supported(struct amdgpu_device *ade
  */
 int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev)
 {
-	acpi_handle handle;
 	union acpi_object *info;
-	struct amdgpu_atcs *atcs = &adev->atcs;
-
-	/* Get the device handle */
-	handle = ACPI_HANDLE(&adev->pdev->dev);
-	if (!handle)
-		return -EINVAL;
+	struct amdgpu_atcs *atcs = &amdgpu_acpi_priv.atcs;
 
 	if (!atcs->functions.pcie_dev_rdy)
 		return -EINVAL;
 
-	info = amdgpu_atcs_call(handle, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL);
+	info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION, NULL);
 	if (!info)
 		return -EIO;
 
@@ -659,9 +652,8 @@ int amdgpu_acpi_pcie_notify_device_ready(struct amdgpu_device *adev)
 int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev,
 					 u8 perf_req, bool advertise)
 {
-	acpi_handle handle;
 	union acpi_object *info;
-	struct amdgpu_atcs *atcs = &adev->atcs;
+	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;
@@ -671,11 +663,6 @@ int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev,
 	if (amdgpu_acpi_pcie_notify_device_ready(adev))
 		return -EINVAL;
 
-	/* Get the device handle */
-	handle = ACPI_HANDLE(&adev->pdev->dev);
-	if (!handle)
-		return -EINVAL;
-
 	if (!atcs->functions.pcie_perf_req)
 		return -EINVAL;
 
@@ -693,7 +680,7 @@ int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev,
 	params.pointer = &atcs_input;
 
 	while (retry--) {
-		info = amdgpu_atcs_call(handle, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, &params);
+		info = amdgpu_atcs_call(atcs, ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST, &params);
 		if (!info)
 			return -EIO;
 
@@ -727,6 +714,96 @@ int amdgpu_acpi_pcie_performance_request(struct amdgpu_device *adev,
 }
 
 /**
+ * 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
@@ -769,50 +846,15 @@ static int amdgpu_acpi_event(struct notifier_block *nb,
  */
 int amdgpu_acpi_init(struct amdgpu_device *adev)
 {
-	acpi_handle handle, atif_handle;
-	struct amdgpu_atif *atif;
-	struct amdgpu_atcs *atcs = &adev->atcs;
-	int ret;
-
-	/* Get the device handle */
-	handle = ACPI_HANDLE(&adev->pdev->dev);
-
-	if (!adev->bios || !handle)
-		return 0;
-
-	/* Call the ATCS method */
-	ret = amdgpu_atcs_verify_interface(handle, atcs);
-	if (ret) {
-		DRM_DEBUG_DRIVER("Call to ATCS verify_interface failed: %d\n", ret);
-	}
-
-	/* Probe for ATIF, and initialize it if found */
-	atif_handle = amdgpu_atif_probe_handle(handle);
-	if (!atif_handle)
-		goto out;
-
-	atif = kzalloc(sizeof(*atif), GFP_KERNEL);
-	if (!atif) {
-		DRM_WARN("Not enough memory to initialize ATIF\n");
-		goto out;
-	}
-	atif->handle = atif_handle;
-
-	/* Call the ATIF method */
-	ret = amdgpu_atif_verify_interface(atif);
-	if (ret) {
-		DRM_DEBUG_DRIVER("Call to ATIF verify_interface failed: %d\n", ret);
-		kfree(atif);
-		goto out;
-	}
-	adev->atif = atif;
+	struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif;
 
 #if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
 	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;
-			atif->bd = dm->backlight_dev;
+			if (dm->backlight_dev)
+				atif->bd = dm->backlight_dev;
 #endif
 		} else {
 			struct drm_encoder *tmp;
@@ -834,6 +876,129 @@ int amdgpu_acpi_init(struct amdgpu_device *adev)
 		}
 	}
 #endif
+	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_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
@@ -863,42 +1028,13 @@ int amdgpu_acpi_init(struct amdgpu_device *adev)
 	} else {
 		atif->backlight_caps.caps_valid = false;
 	}
-
-out:
-	adev->acpi_nb.notifier_call = amdgpu_acpi_event;
-	register_acpi_notifier(&adev->acpi_nb);
-
-	return ret;
-}
-
-void amdgpu_acpi_get_backlight_caps(struct amdgpu_device *adev,
-		struct amdgpu_dm_backlight_caps *caps)
-{
-	if (!adev->atif) {
-		caps->caps_valid = false;
-		return;
-	}
-	caps->caps_valid = adev->atif->backlight_caps.caps_valid;
-	caps->min_input_signal = adev->atif->backlight_caps.min_input_signal;
-	caps->max_input_signal = adev->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);
-	kfree(adev->atif);
 }
 
 /**
  * amdgpu_acpi_is_s0ix_supported
  *
+ * @adev: amdgpu_device_pointer
+ *
  * returns true if supported, false if not.
  */
 bool amdgpu_acpi_is_s0ix_supported(struct amdgpu_device *adev)