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ASoC: SOF: Intel: hda-mlink: add helper to check cmdsync
This helper is an optimization where sync_go is only called when the cmdsync field is actually set to a non-zero value. Since this is also only used by SoundWire for now, only expose the _unlocked version. 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/20230404104127.5629-15-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
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@ -29,6 +29,9 @@ void hdac_bus_eml_sdw_sync_arm_unlocked(struct hdac_bus *bus, int sublink);
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int hdac_bus_eml_sync_go_unlocked(struct hdac_bus *bus, bool alt, int elid);
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int hdac_bus_eml_sdw_sync_go_unlocked(struct hdac_bus *bus);
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bool hdac_bus_eml_check_cmdsync_unlocked(struct hdac_bus *bus, bool alt, int elid);
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bool hdac_bus_eml_sdw_check_cmdsync_unlocked(struct hdac_bus *bus);
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int hdac_bus_eml_power_up(struct hdac_bus *bus, bool alt, int elid, int sublink);
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int hdac_bus_eml_power_up_unlocked(struct hdac_bus *bus, bool alt, int elid, int sublink);
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@ -92,6 +95,12 @@ hdac_bus_eml_sync_go_unlocked(struct hdac_bus *bus, bool alt, int elid) { return
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static inline int
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hdac_bus_eml_sdw_sync_go_unlocked(struct hdac_bus *bus) { return 0; }
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static inline bool
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hdac_bus_eml_check_cmdsync_unlocked(struct hdac_bus *bus, bool alt, int elid) { return false; }
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static inline bool
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hdac_bus_eml_sdw_check_cmdsync_unlocked(struct hdac_bus *bus) { return false; }
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static inline int
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hdac_bus_eml_power_up(struct hdac_bus *bus, bool alt, int elid, int sublink)
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{
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@ -314,6 +314,15 @@ static void hdaml_link_sync_go(u32 __iomem *lsync)
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writel(val, lsync);
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}
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static bool hdaml_link_check_cmdsync(u32 __iomem *lsync, u32 cmdsync_mask)
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{
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u32 val;
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val = readl(lsync);
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return !!(val & cmdsync_mask);
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}
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/* END HDAML section */
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static int hda_ml_alloc_h2link(struct hdac_bus *bus, int index)
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@ -562,6 +571,35 @@ int hdac_bus_eml_sdw_sync_go_unlocked(struct hdac_bus *bus)
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}
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EXPORT_SYMBOL_NS(hdac_bus_eml_sdw_sync_go_unlocked, SND_SOC_SOF_HDA_MLINK);
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bool hdac_bus_eml_check_cmdsync_unlocked(struct hdac_bus *bus, bool alt, int elid)
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{
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struct hdac_ext2_link *h2link;
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struct hdac_ext_link *hlink;
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u32 cmdsync_mask;
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h2link = find_ext2_link(bus, alt, elid);
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if (!h2link)
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return 0;
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if (!h2link->lss)
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return 0;
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hlink = &h2link->hext_link;
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cmdsync_mask = GENMASK(AZX_REG_ML_LSYNC_CMDSYNC_SHIFT + h2link->slcount - 1,
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AZX_REG_ML_LSYNC_CMDSYNC_SHIFT);
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return hdaml_link_check_cmdsync(hlink->ml_addr + AZX_REG_ML_LSYNC,
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cmdsync_mask);
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}
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EXPORT_SYMBOL_NS(hdac_bus_eml_check_cmdsync_unlocked, SND_SOC_SOF_HDA_MLINK);
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bool hdac_bus_eml_sdw_check_cmdsync_unlocked(struct hdac_bus *bus)
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{
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return hdac_bus_eml_check_cmdsync_unlocked(bus, true, AZX_REG_ML_LEPTR_ID_SDW);
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}
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EXPORT_SYMBOL_NS(hdac_bus_eml_sdw_check_cmdsync_unlocked, SND_SOC_SOF_HDA_MLINK);
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static int hdac_bus_eml_power_up_base(struct hdac_bus *bus, bool alt, int elid, int sublink,
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bool eml_lock)
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{
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