From: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxx>
Reviewed-by: Rander Wang <rander.wang@xxxxxxxxx>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@xxxxxxxxxxxxxxx>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxxxxxxxx>
---
include/sound/hda-mlink.h | 18 +++++++++
sound/soc/sof/intel/hda-mlink.c | 70 +++++++++++++++++++++++++++++++++
2 files changed, 88 insertions(+)
diff --git a/include/sound/hda-mlink.h b/include/sound/hda-mlink.h
index 80af2a3996d7..234af269495e 100644
--- a/include/sound/hda-mlink.h
+++ b/include/sound/hda-mlink.h
@@ -23,6 +23,12 @@ int hdac_bus_eml_sdw_set_syncprd_unlocked(struct hdac_bus *bus, u32 syncprd);
int hdac_bus_eml_wait_syncpu_unlocked(struct hdac_bus *bus, bool alt, int elid);
int hdac_bus_eml_sdw_wait_syncpu_unlocked(struct hdac_bus *bus);
+void hdac_bus_eml_sync_arm_unlocked(struct hdac_bus *bus, bool alt, int elid, int sublink);
+void hdac_bus_eml_sdw_sync_arm_unlocked(struct hdac_bus *bus, int sublink);
+
+int hdac_bus_eml_sync_go_unlocked(struct hdac_bus *bus, bool alt, int elid);
+int hdac_bus_eml_sdw_sync_go_unlocked(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);
@@ -74,6 +80,18 @@ hdac_bus_eml_wait_syncpu_unlocked(struct hdac_bus *bus, bool alt, int elid)
static inline int
hdac_bus_eml_sdw_wait_syncpu_unlocked(struct hdac_bus *bus) { return 0; }
+static inline void
+hdac_bus_eml_sync_arm_unlocked(struct hdac_bus *bus, bool alt, int elid, int sublink) { }
+
+static inline void
+hdac_bus_eml_sdw_sync_arm_unlocked(struct hdac_bus *bus, int sublink) { }
+
+static inline int
+hdac_bus_eml_sync_go_unlocked(struct hdac_bus *bus, bool alt, int elid) { return 0; }
+
+static inline int
+hdac_bus_eml_sdw_sync_go_unlocked(struct hdac_bus *bus) { return 0; }
+
static inline int
hdac_bus_eml_power_up(struct hdac_bus *bus, bool alt, int elid, int sublink)
{
diff --git a/sound/soc/sof/intel/hda-mlink.c b/sound/soc/sof/intel/hda-mlink.c
index a364d6b5935d..c8371ab03c0a 100644
--- a/sound/soc/sof/intel/hda-mlink.c
+++ b/sound/soc/sof/intel/hda-mlink.c
@@ -294,6 +294,26 @@ static int hdaml_link_wait_syncpu(u32 __iomem *lsync)
return hdaml_wait_bit(lsync, 0, AZX_REG_ML_LSYNC_SYNCPU, 0);
}
+static void hdaml_link_sync_arm(u32 __iomem *lsync, int sublink)
+{
+ u32 val;
+
+ val = readl(lsync);
+ val |= (AZX_REG_ML_LSYNC_CMDSYNC << sublink);
+
+ writel(val, lsync);
+}
+
+static void hdaml_link_sync_go(u32 __iomem *lsync)
+{
+ u32 val;
+
+ val = readl(lsync);
+ val |= AZX_REG_ML_LSYNC_SYNCGO;
+
+ writel(val, lsync);
+}
+
/* END HDAML section */
static int hda_ml_alloc_h2link(struct hdac_bus *bus, int index)
@@ -492,6 +512,56 @@ int hdac_bus_eml_sdw_wait_syncpu_unlocked(struct hdac_bus *bus)
}
EXPORT_SYMBOL_NS(hdac_bus_eml_sdw_wait_syncpu_unlocked, SND_SOC_SOF_HDA_MLINK);
+void hdac_bus_eml_sync_arm_unlocked(struct hdac_bus *bus, bool alt, int elid, int sublink)
+{
+ struct hdac_ext2_link *h2link;
+ struct hdac_ext_link *hlink;
+
+ h2link = find_ext2_link(bus, alt, elid);
+ if (!h2link)
+ return;
+
+ if (!h2link->lss)
+ return;
+
+ hlink = &h2link->hext_link;
+
+ hdaml_link_sync_arm(hlink->ml_addr + AZX_REG_ML_LSYNC, sublink);
+}
+EXPORT_SYMBOL_NS(hdac_bus_eml_sync_arm_unlocked, SND_SOC_SOF_HDA_MLINK);
+
+void hdac_bus_eml_sdw_sync_arm_unlocked(struct hdac_bus *bus, int sublink)
+{
+ hdac_bus_eml_sync_arm_unlocked(bus, true, AZX_REG_ML_LEPTR_ID_SDW, sublink);
+}
+EXPORT_SYMBOL_NS(hdac_bus_eml_sdw_sync_arm_unlocked, SND_SOC_SOF_HDA_MLINK);
+
+int hdac_bus_eml_sync_go_unlocked(struct hdac_bus *bus, bool alt, int elid)
+{
+ struct hdac_ext2_link *h2link;
+ struct hdac_ext_link *hlink;
+
+ h2link = find_ext2_link(bus, alt, elid);
+ if (!h2link)
+ return 0;
+
+ if (!h2link->lss)
+ return 0;
+
+ hlink = &h2link->hext_link;
+
+ hdaml_link_sync_go(hlink->ml_addr + AZX_REG_ML_LSYNC);
+
+ return 0;
+}
+EXPORT_SYMBOL_NS(hdac_bus_eml_sync_go_unlocked, SND_SOC_SOF_HDA_MLINK);
+
+int hdac_bus_eml_sdw_sync_go_unlocked(struct hdac_bus *bus)
+{
+ return hdac_bus_eml_sync_go_unlocked(bus, true, AZX_REG_ML_LEPTR_ID_SDW);
+}
+EXPORT_SYMBOL_NS(hdac_bus_eml_sdw_sync_go_unlocked, SND_SOC_SOF_HDA_MLINK);
+
static int hdac_bus_eml_power_up_base(struct hdac_bus *bus, bool alt, int elid, int sublink,
bool eml_lock)
{
--
2.40.0
