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ASoC: SOF: Intel: hda-mlink: add helper to retrieve eml_lock

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For SoundWire usages, we need to use the global eml_lock to
serialize/protect all accesses to shared registers.  Due to the split
implementation across two subsystems, we need to pass a pointer
around.

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/20230404104127.5629-19-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Pierre-Louis Bossart 2023-04-04 13:41:27 +03:00 committed by Mark Brown
parent 82958c406d
commit 681f27f302
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2 changed files with 17 additions and 0 deletions
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5
include/sound/hda-mlink.h
View File

@ -52,6 +52,8 @@ int hda_bus_ml_suspend(struct hdac_bus *bus);
struct hdac_ext_link *hdac_bus_eml_ssp_get_hlink(struct hdac_bus *bus);
struct hdac_ext_link *hdac_bus_eml_dmic_get_hlink(struct hdac_bus *bus);
struct mutex *hdac_bus_eml_get_mutex(struct hdac_bus *bus, bool alt, int elid);
int hdac_bus_eml_enable_offload(struct hdac_bus *bus, bool alt, int elid, bool enable);
#else
@ -153,6 +155,9 @@ hdac_bus_eml_ssp_get_hlink(struct hdac_bus *bus) { return NULL; }
static inline struct hdac_ext_link *
hdac_bus_eml_dmic_get_hlink(struct hdac_bus *bus) { return NULL; }
static inline struct mutex *
hdac_bus_eml_get_mutex(struct hdac_bus *bus, bool alt, int elid) { return NULL; }
static inline int
hdac_bus_eml_enable_offload(struct hdac_bus *bus, bool alt, int elid, bool enable)
{

12
sound/soc/sof/intel/hda-mlink.c
View File

@ -800,6 +800,18 @@ int hda_bus_ml_suspend(struct hdac_bus *bus)
}
EXPORT_SYMBOL_NS(hda_bus_ml_suspend, SND_SOC_SOF_HDA_MLINK);
struct mutex *hdac_bus_eml_get_mutex(struct hdac_bus *bus, bool alt, int elid)
{
struct hdac_ext2_link *h2link;
h2link = find_ext2_link(bus, alt, elid);
if (!h2link)
return NULL;
return &h2link->eml_lock;
}
EXPORT_SYMBOL_NS(hdac_bus_eml_get_mutex, SND_SOC_SOF_HDA_MLINK);
struct hdac_ext_link *hdac_bus_eml_ssp_get_hlink(struct hdac_bus *bus)
{
struct hdac_ext2_link *h2link;