From: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com
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 --- include/sound/hda-mlink.h | 5 +++++ sound/soc/sof/intel/hda-mlink.c | 12 ++++++++++++ 2 files changed, 17 insertions(+)
diff --git a/include/sound/hda-mlink.h b/include/sound/hda-mlink.h index fee42c432fa3..dbc47af08135 100644 --- a/include/sound/hda-mlink.h +++ b/include/sound/hda-mlink.h @@ -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) { diff --git a/sound/soc/sof/intel/hda-mlink.c b/sound/soc/sof/intel/hda-mlink.c index b9ce07c38bb5..775582ab7494 100644 --- a/sound/soc/sof/intel/hda-mlink.c +++ b/sound/soc/sof/intel/hda-mlink.c @@ -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;