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ASoC: SOF: Intel: hda-mlink: add helpers for sync_arm/sync_go
The multi-link synchronization uses the same concept and registers, but moved to the HDAudio extended links. Add helpers for sync_arm and sync_go which are the basic for the bus reset, bank switch and clock stop. Since SoundWire is the only user of those helpers, only expose the _unlocked versions for now. Note that SYNCGO is a write-only bit, so no error can be reported. We still return 0 for compatibility with the SoundWire stream management headers. 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/20230404104127.5629-14-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org>
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@ -23,6 +23,12 @@ int hdac_bus_eml_sdw_set_syncprd_unlocked(struct hdac_bus *bus, u32 syncprd);
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int hdac_bus_eml_wait_syncpu_unlocked(struct hdac_bus *bus, bool alt, int elid);
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int hdac_bus_eml_sdw_wait_syncpu_unlocked(struct hdac_bus *bus);
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void hdac_bus_eml_sync_arm_unlocked(struct hdac_bus *bus, bool alt, int elid, int sublink);
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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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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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@ -74,6 +80,18 @@ hdac_bus_eml_wait_syncpu_unlocked(struct hdac_bus *bus, bool alt, int elid)
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static inline int
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hdac_bus_eml_sdw_wait_syncpu_unlocked(struct hdac_bus *bus) { return 0; }
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static inline void
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hdac_bus_eml_sync_arm_unlocked(struct hdac_bus *bus, bool alt, int elid, int sublink) { }
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static inline void
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hdac_bus_eml_sdw_sync_arm_unlocked(struct hdac_bus *bus, int sublink) { }
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static inline int
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hdac_bus_eml_sync_go_unlocked(struct hdac_bus *bus, bool alt, int elid) { return 0; }
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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 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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@ -294,6 +294,26 @@ static int hdaml_link_wait_syncpu(u32 __iomem *lsync)
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return hdaml_wait_bit(lsync, 0, AZX_REG_ML_LSYNC_SYNCPU, 0);
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}
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static void hdaml_link_sync_arm(u32 __iomem *lsync, int sublink)
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{
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u32 val;
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val = readl(lsync);
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val |= (AZX_REG_ML_LSYNC_CMDSYNC << sublink);
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writel(val, lsync);
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}
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static void hdaml_link_sync_go(u32 __iomem *lsync)
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{
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u32 val;
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val = readl(lsync);
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val |= AZX_REG_ML_LSYNC_SYNCGO;
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writel(val, lsync);
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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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@ -492,6 +512,56 @@ int hdac_bus_eml_sdw_wait_syncpu_unlocked(struct hdac_bus *bus)
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}
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EXPORT_SYMBOL_NS(hdac_bus_eml_sdw_wait_syncpu_unlocked, SND_SOC_SOF_HDA_MLINK);
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void hdac_bus_eml_sync_arm_unlocked(struct hdac_bus *bus, bool alt, int elid, int sublink)
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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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h2link = find_ext2_link(bus, alt, elid);
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if (!h2link)
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return;
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if (!h2link->lss)
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return;
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hlink = &h2link->hext_link;
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hdaml_link_sync_arm(hlink->ml_addr + AZX_REG_ML_LSYNC, sublink);
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}
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EXPORT_SYMBOL_NS(hdac_bus_eml_sync_arm_unlocked, SND_SOC_SOF_HDA_MLINK);
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void hdac_bus_eml_sdw_sync_arm_unlocked(struct hdac_bus *bus, int sublink)
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{
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hdac_bus_eml_sync_arm_unlocked(bus, true, AZX_REG_ML_LEPTR_ID_SDW, sublink);
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}
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EXPORT_SYMBOL_NS(hdac_bus_eml_sdw_sync_arm_unlocked, SND_SOC_SOF_HDA_MLINK);
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int hdac_bus_eml_sync_go_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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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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hdaml_link_sync_go(hlink->ml_addr + AZX_REG_ML_LSYNC);
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return 0;
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}
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EXPORT_SYMBOL_NS(hdac_bus_eml_sync_go_unlocked, SND_SOC_SOF_HDA_MLINK);
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int hdac_bus_eml_sdw_sync_go_unlocked(struct hdac_bus *bus)
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{
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return hdac_bus_eml_sync_go_unlocked(bus, true, AZX_REG_ML_LEPTR_ID_SDW);
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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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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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