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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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996bf834d0
Add a helper function to parse all the Function and Entity information from ACPI. In SDCA each device may have several Functions and each corresponds to a specific audio capability such as say amplifier playback or microphone capture. Each Function then contains a number of Entities that represent individual parts of the audio signal chain and are linked together in a graph similar to DAPM. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.dev> Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.dev> Link: https://patch.msgid.link/20250205113801.3699902-3-ckeepax@opensource.cirrus.com Signed-off-by: Mark Brown <broonie@kernel.org>
68 lines
1.7 KiB
C
68 lines
1.7 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 sdw_slave;
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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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* @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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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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*/
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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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};
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enum sdca_quirk {
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SDCA_QUIRKS_RT712_VB,
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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_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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#else
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static inline void sdca_lookup_functions(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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#endif
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#endif
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