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17c9b6ec35
Extend hdac_ext_link to store information needed for ALT links. Follow-up patches will include more functional patches for power-up and down. Note that this patch suggests the use of an 'eml_lock' to serialize access to shared registers. SoundWire-specific sequence require the lock to be taken at a higher level, as a result the helpers added in follow-up patches will provide 'unlocked' versions when needed. Also note that the low-level sequences with the 'hdaml_' prefix are taken directly from the hardware specifications - naming conventions included. The code will be split in two, with locking and linked-list management handled separately to avoid mixing required hardware setup and Linux-based resource management. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Rander Wang <rander.wang@intel.com> Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com> Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com> Reviewed-by: Takashi Iwai <tiwai@suse.de> Link: https://lore.kernel.org/r/20230404104127.5629-7-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
32 lines
1 KiB
C
32 lines
1 KiB
C
/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
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/*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* Copyright(c) 2022-2023 Intel Corporation. All rights reserved.
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*/
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struct hdac_bus;
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#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_MLINK)
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int hda_bus_ml_init(struct hdac_bus *bus);
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void hda_bus_ml_free(struct hdac_bus *bus);
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void hda_bus_ml_put_all(struct hdac_bus *bus);
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void hda_bus_ml_reset_losidv(struct hdac_bus *bus);
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int hda_bus_ml_resume(struct hdac_bus *bus);
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int hda_bus_ml_suspend(struct hdac_bus *bus);
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#else
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static inline int
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hda_bus_ml_init(struct hdac_bus *bus) { return 0; }
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static inline void hda_bus_ml_free(struct hdac_bus *bus) { }
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static inline void hda_bus_ml_put_all(struct hdac_bus *bus) { }
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static inline void hda_bus_ml_reset_losidv(struct hdac_bus *bus) { }
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static inline int hda_bus_ml_resume(struct hdac_bus *bus) { return 0; }
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static inline int hda_bus_ml_suspend(struct hdac_bus *bus) { return 0; }
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#endif /* CONFIG_SND_SOC_SOF_HDA */
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