From: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
While the hardware exposes independent bits to power-up each master,
the recommended sequence is to power all links or none. Idle links can
still use the clock stop mode while the master is powered.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Signed-off-by: Bard Liao <yung-chuan.liao@xxxxxxxxxxxxxxx>
---
drivers/soundwire/intel.h | 2 ++
drivers/soundwire/intel_init.c | 1 +
2 files changed, 3 insertions(+)
diff --git a/drivers/soundwire/intel.h b/drivers/soundwire/intel.h
index 23daab9da329..76820d0b9deb 100644
--- a/drivers/soundwire/intel.h
+++ b/drivers/soundwire/intel.h
@@ -18,6 +18,7 @@
* @shim_lock: mutex to handle access to shared SHIM registers
* @shim_mask: global pointer to check SHIM register initialization
* @clock_stop_quirks: mask defining requested behavior on pm_suspend
+ * @link_mask: global mask needed for power-up/down sequences
* @cdns: Cadence master descriptor
* @list: used to walk-through all masters exposed by the same controller
*/
@@ -33,6 +34,7 @@ struct sdw_intel_link_res {
struct mutex *shim_lock; /* protect shared registers */
u32 *shim_mask;
u32 clock_stop_quirks;
+ u32 link_mask;
struct sdw_cdns *cdns;
struct list_head list;
};
diff --git a/drivers/soundwire/intel_init.c b/drivers/soundwire/intel_init.c
index add46d8fc85c..65d9b9bd2106 100644
--- a/drivers/soundwire/intel_init.c
+++ b/drivers/soundwire/intel_init.c
@@ -255,6 +255,7 @@ static struct sdw_intel_ctx
link->clock_stop_quirks = res->clock_stop_quirks;
link->shim_lock = &ctx->shim_lock;
link->shim_mask = &ctx->shim_mask;
+ link->link_mask = link_mask;
memset(&pdevinfo, 0, sizeof(pdevinfo));
--
2.17.1
