1 // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
2 // Copyright(c) 2015-2021 Intel Corporation.
16 #include <linux/soundwire/sdw_intel.h>
34 		 "mipi-sdw-link-%hhu-subproperties", idx);  in is_link_enabled()
41 				 "intel-quirk-mask",  in is_link_enabled()
53 	struct acpi_device *adev = acpi_fetch_acpi_dev(info->handle);  in sdw_intel_scan_controller()
58 		return -EINVAL;  in sdw_intel_scan_controller()
60 	/* Found controller, find links supported */  in sdw_intel_scan_controller()
63 					    "mipi-sdw-master-count", &count, 1);  in sdw_intel_scan_controller()
67 	 * hardware, but in that step we cannot assume SoundWire IP is  in sdw_intel_scan_controller()
71 	 * 'master-count' property then all the inits based on link  in sdw_intel_scan_controller()
78 		dev_err(&adev->dev,  in sdw_intel_scan_controller()
79 			"Failed to read mipi-sdw-master-count: %d\n", ret);  in sdw_intel_scan_controller()
80 		return -EINVAL;  in sdw_intel_scan_controller()
85 		dev_err(&adev->dev, "Link count %d exceeds max %d\n",  in sdw_intel_scan_controller()
87 		return -EINVAL;  in sdw_intel_scan_controller()
91 		dev_warn(&adev->dev, "No SoundWire links detected\n");  in sdw_intel_scan_controller()
92 		return -EINVAL;  in sdw_intel_scan_controller()
94 	dev_dbg(&adev->dev, "ACPI reports %d SDW Link devices\n", count);  in sdw_intel_scan_controller()
96 	info->count = count;  in sdw_intel_scan_controller()
97 	info->link_mask = 0;  in sdw_intel_scan_controller()
101 			dev_dbg(&adev->dev,  in sdw_intel_scan_controller()
107 			dev_dbg(&adev->dev,  in sdw_intel_scan_controller()
112 		info->link_mask |= BIT(i);  in sdw_intel_scan_controller()
136 	 * device can be found, but only one of them is the SoundWire  in sdw_intel_acpi_cb()
137 	 * controller. The SNDW device is always exposed with  in sdw_intel_acpi_cb()
139 	 * SoundWire link so filter accordingly  in sdw_intel_acpi_cb()
144 	/* found the correct SoundWire controller */  in sdw_intel_acpi_cb()
145 	info->handle = handle;  in sdw_intel_acpi_cb()
152  * sdw_intel_acpi_scan() - SoundWire Intel init routine
157  * links to enable. A follow-up use of sdw_intel_probe() and
166 	info->handle = NULL;  in sdw_intel_acpi_scan()
177 	if (ACPI_FAILURE(status) || info->handle == NULL)  in sdw_intel_acpi_scan()
178 		return -ENODEV;  in sdw_intel_acpi_scan()
185 MODULE_DESCRIPTION("Intel Soundwire ACPI helpers");