diff options
author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2023-04-04 13:41:17 +0300 |
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committer | Mark Brown <broonie@kernel.org> | 2023-04-06 18:45:40 +0300 |
commit | fc7dab8ec0b4a451dd5737aa4f06a0e8bd6efa32 (patch) | |
tree | 44fa547fa0863e4772c48da746b40161c96cd403 /include | |
parent | 4c2d4e446d5673db2c653a6e53ca9be908582c4e (diff) | |
download | linux-fc7dab8ec0b4a451dd5737aa4f06a0e8bd6efa32.tar.xz |
ASoC: SOF: Intel: hda-mlink: introduce helpers for 'extended links' PM
Add helpers to program SPA/CPA bits, using a mutex to access the
shared LCTL register if required.
All links are managed with the same LCTLx.SPA bits. However there are
quite a few implementation details to be aware of:
Legacy HDaudio multi-links are powered-up when exiting reset, which
requires the ref_count to be manually set to one when initializing the
link.
Alternate links for SoundWire/DMIC/SSP need to be explicitly
powered-up before accessing the SHIM/IP/Vendor-Specific SHIM space for
each sublink. DMIC/SSP/SoundWire are all different cases with a
different device/dai/hlink relationship.
SoundWire will handle power management with the auxiliary device
resume/suspend routine. The ref_count is not necessary in this case.
The DMIC/SSP will by contrast handle the power management from DAI
.startup and .shutdown callbacks.
The SSP has a 1:1 mapping between sublink and DAI, but it's
bidirectional so the ref_count will help avoid turning off the sublink
when one of the two directions is still in use.
The DMIC has a single link but two DAIs for data generated at
different sampling frequencies, again the ref_count will make sure the
two DAIs can be used concurrently.
And last the SoundWire Intel require power-up/down and bank switch to
be handled with a lock already taken, so the 'eml_lock' is made
optional with the _unlocked versions of the helpers.
Note that the _check_power_active() implementation is similar to
previous helpers in sound/hda/ext, with sleep duration and timeout
aligned with hardware recommendations. If desired, this helper could
be modified in a second step with .e.g. readl_poll_timeout()
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/20230404104127.5629-9-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include')
-rw-r--r-- | include/sound/hda-mlink.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/sound/hda-mlink.h b/include/sound/hda-mlink.h index 8048bf01c133..6ecb4c29e472 100644 --- a/include/sound/hda-mlink.h +++ b/include/sound/hda-mlink.h @@ -12,6 +12,13 @@ struct hdac_bus; int hda_bus_ml_init(struct hdac_bus *bus); void hda_bus_ml_free(struct hdac_bus *bus); + +int hdac_bus_eml_power_up(struct hdac_bus *bus, bool alt, int elid, int sublink); +int hdac_bus_eml_power_up_unlocked(struct hdac_bus *bus, bool alt, int elid, int sublink); + +int hdac_bus_eml_power_down(struct hdac_bus *bus, bool alt, int elid, int sublink); +int hdac_bus_eml_power_down_unlocked(struct hdac_bus *bus, bool alt, int elid, int sublink); + void hda_bus_ml_put_all(struct hdac_bus *bus); void hda_bus_ml_reset_losidv(struct hdac_bus *bus); int hda_bus_ml_resume(struct hdac_bus *bus); @@ -23,6 +30,31 @@ static inline int hda_bus_ml_init(struct hdac_bus *bus) { return 0; } static inline void hda_bus_ml_free(struct hdac_bus *bus) { } + +static inline int +hdac_bus_eml_power_up(struct hdac_bus *bus, bool alt, int elid, int sublink) +{ + return 0; +} + +static inline int +hdac_bus_eml_power_up_unlocked(struct hdac_bus *bus, bool alt, int elid, int sublink) +{ + return 0; +} + +static inline int +hdac_bus_eml_power_down(struct hdac_bus *bus, bool alt, int elid, int sublink) +{ + return 0; +} + +static inline int +hdac_bus_eml_power_down_unlocked(struct hdac_bus *bus, bool alt, int elid, int sublink) +{ + return 0; +} + static inline void hda_bus_ml_put_all(struct hdac_bus *bus) { } static inline void hda_bus_ml_reset_losidv(struct hdac_bus *bus) { } static inline int hda_bus_ml_resume(struct hdac_bus *bus) { return 0; } |