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Use the auxiliary bus to register/unregister subdevices for each function. Each function will be handled with a separate driver, matched using a name. If a vendor wants to override a specific function driver, they could use a custom name to match with a custom function driver. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Tested-by: Bard Liao <yung-chuan.liao@linux.intel.com> Reviewed-by: Maciej Strozek <mstrozek@opensource.cirrus.com> Reviewed-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com> Tested-by: Richard Fitzgerald <rf@opensource.cirrus.com> Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com> Link: https://patch.msgid.link/20251120153023.2105663-12-ckeepax@opensource.cirrus.com Reviewed-by: Vinod Koul <vkoul@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org>
88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
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/*
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* The MIPI SDCA specification is available for public downloads at
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* https://www.mipi.org/mipi-sdca-v1-0-download
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*
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* Copyright(c) 2024 Intel Corporation
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*/
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#ifndef __SDCA_H__
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#define __SDCA_H__
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#include <linux/types.h>
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#include <linux/kconfig.h>
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struct acpi_table_swft;
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struct fwnode_handle;
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struct sdw_slave;
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struct sdca_dev;
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#define SDCA_MAX_FUNCTION_COUNT 8
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/**
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* struct sdca_function_desc - short descriptor for an SDCA Function
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* @node: firmware node for the Function.
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* @func_dev: pointer to SDCA function device.
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* @name: Human-readable string.
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* @type: Function topology type.
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* @adr: ACPI address (used for SDCA register access).
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*/
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struct sdca_function_desc {
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struct fwnode_handle *node;
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struct sdca_dev *func_dev;
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const char *name;
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u32 type;
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u8 adr;
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};
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/**
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* struct sdca_device_data - structure containing all SDCA related information
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* @interface_revision: Value read from _DSD property, mainly to check
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* for changes between silicon versions.
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* @num_functions: Total number of supported SDCA functions. Invalid/unsupported
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* functions will be skipped.
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* @function: Array of function descriptors.
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* @swft: Pointer to the SWFT table, if available.
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*/
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struct sdca_device_data {
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u32 interface_revision;
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int num_functions;
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struct sdca_function_desc function[SDCA_MAX_FUNCTION_COUNT];
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struct acpi_table_swft *swft;
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};
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enum sdca_quirk {
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SDCA_QUIRKS_RT712_VB,
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SDCA_QUIRKS_SKIP_FUNC_TYPE_PATCHING,
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};
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#if IS_ENABLED(CONFIG_ACPI) && IS_ENABLED(CONFIG_SND_SOC_SDCA)
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void sdca_lookup_functions(struct sdw_slave *slave);
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void sdca_lookup_swft(struct sdw_slave *slave);
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void sdca_lookup_interface_revision(struct sdw_slave *slave);
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bool sdca_device_quirk_match(struct sdw_slave *slave, enum sdca_quirk quirk);
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int sdca_dev_register_functions(struct sdw_slave *slave);
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void sdca_dev_unregister_functions(struct sdw_slave *slave);
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#else
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static inline void sdca_lookup_functions(struct sdw_slave *slave) {}
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static inline void sdca_lookup_swft(struct sdw_slave *slave) {}
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static inline void sdca_lookup_interface_revision(struct sdw_slave *slave) {}
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static inline bool sdca_device_quirk_match(struct sdw_slave *slave, enum sdca_quirk quirk)
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{
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return false;
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}
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static inline int sdca_dev_register_functions(struct sdw_slave *slave)
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{
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return 0;
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}
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static inline void sdca_dev_unregister_functions(struct sdw_slave *slave) {}
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#endif
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#endif
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