sdca_device.c

  1// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
  2// Copyright(c) 2024 Intel Corporation
  3
  4/*
  5 * The MIPI SDCA specification is available for public downloads at
  6 * https://www.mipi.org/mipi-sdca-v1-0-download
  7 */
  8
  9#include <linux/acpi.h>
 10#include <linux/device.h>
 11#include <linux/dmi.h>
 12#include <linux/module.h>
 13#include <linux/property.h>
 14#include <linux/soundwire/sdw.h>
 15#include <sound/sdca.h>
 16#include <sound/sdca_function.h>
 17
 18void sdca_lookup_interface_revision(struct sdw_slave *slave)
 19{
 20	struct fwnode_handle *fwnode = slave->dev.fwnode;
 21
 22	/*
 23	 * if this property is not present, then the sdca_interface_revision will
 24	 * remain zero, which will be considered as 'not defined' or 'invalid'.
 25	 */
 26	fwnode_property_read_u32(fwnode, "mipi-sdw-sdca-interface-revision",
 27				 &slave->sdca_data.interface_revision);
 28}
 29EXPORT_SYMBOL_NS(sdca_lookup_interface_revision, "SND_SOC_SDCA");
 30
 31static void devm_acpi_table_put(void *ptr)
 32{
 33	acpi_put_table((struct acpi_table_header *)ptr);
 34}
 35
 36void sdca_lookup_swft(struct sdw_slave *slave)
 37{
 38	acpi_status status;
 39
 40	status = acpi_get_table(ACPI_SIG_SWFT, 0,
 41				(struct acpi_table_header **)&slave->sdca_data.swft);
 42	if (ACPI_FAILURE(status))
 43		dev_info(&slave->dev, "SWFT not available\n");
 44	else
 45		devm_add_action_or_reset(&slave->dev, devm_acpi_table_put,
 46					 &slave->sdca_data.swft);
 47}
 48EXPORT_SYMBOL_NS(sdca_lookup_swft, "SND_SOC_SDCA");
 49
 50static bool sdca_device_quirk_rt712_vb(struct sdw_slave *slave)
 51{
 52	struct sdw_slave_id *id = &slave->id;
 53	int i;
 54
 55	/*
 56	 * The RT712_VA relies on the v06r04 draft, and the
 57	 * RT712_VB on a more recent v08r01 draft.
 58	 */
 59	if (slave->sdca_data.interface_revision < 0x0801)
 60		return false;
 61
 62	if (id->mfg_id != 0x025d)
 63		return false;
 64
 65	if (id->part_id != 0x712 &&
 66	    id->part_id != 0x713 &&
 67	    id->part_id != 0x716 &&
 68	    id->part_id != 0x717)
 69		return false;
 70
 71	for (i = 0; i < slave->sdca_data.num_functions; i++) {
 72		if (slave->sdca_data.function[i].type == SDCA_FUNCTION_TYPE_SMART_MIC)
 73			return true;
 74	}
 75
 76	return false;
 77}
 78
 79static bool sdca_device_quirk_skip_func_type_patching(struct sdw_slave *slave)
 80{
 81	const char *vendor, *sku;
 82
 83	vendor = dmi_get_system_info(DMI_SYS_VENDOR);
 84	sku = dmi_get_system_info(DMI_PRODUCT_SKU);
 85
 86	if (vendor && sku &&
 87	    !strcmp(vendor, "Dell Inc.") &&
 88	    (!strcmp(sku, "0C62") || !strcmp(sku, "0C63") || !strcmp(sku, "0C6B")) &&
 89	    slave->sdca_data.interface_revision == 0x061c &&
 90	    slave->id.mfg_id == 0x01fa && slave->id.part_id == 0x4243)
 91		return true;
 92
 93	return false;
 94}
 95
 96bool sdca_device_quirk_match(struct sdw_slave *slave, enum sdca_quirk quirk)
 97{
 98	switch (quirk) {
 99	case SDCA_QUIRKS_RT712_VB:
100		return sdca_device_quirk_rt712_vb(slave);
101	case SDCA_QUIRKS_SKIP_FUNC_TYPE_PATCHING:
102		return sdca_device_quirk_skip_func_type_patching(slave);
103	default:
104		break;
105	}
106	return false;
107}
108EXPORT_SYMBOL_NS(sdca_device_quirk_match, "SND_SOC_SDCA");