Unverified Commit 681f27f3 authored by Pierre-Louis Bossart's avatar Pierre-Louis Bossart Committed by Mark Brown
Browse files

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



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: default avatarPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: default avatarRander Wang <rander.wang@intel.com>
Reviewed-by: default avatarPéter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: default avatarRanjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: default avatarPeter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: default avatarTakashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20230404104127.5629-19-peter.ujfalusi@linux.intel.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 82958c40

include/sound/hda-mlink.h

+5 −0
Original line number Diff line number Diff line
@@ -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)

{

sound/soc/sof/intel/hda-mlink.c

+12 −0
Original line number Diff line number Diff line
@@ -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;