[PATCH 13/20] soundwire: intel_ace2x: configure link PHY

Bard Liao
2023-03-23T05:31:47Z

Unlike previous hardware generations, the glue-to-master transition is
not managed by software, instead the transitions are managed as part
of the power-up/down sequences controlled by SPA/CPA bits.

The only thing that's required is to configure the link PHY for
'normal' operation instead of the PHY test mode.

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: Bard Liao <yung-chuan.liao@linux.intel.com>
---
drivers/soundwire/intel_ace2x.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)

diff --git a/drivers/soundwire/intel_ace2x.c b/drivers/soundwire/intel_ace2x.c
index 01668246b7ba..5deff32976f1 100644
--- a/drivers/soundwire/intel_ace2x.c
+++ b/drivers/soundwire/intel_ace2x.c
@@ -15,6 +15,22 @@
#include "bus.h"
#include "intel.h"

+/*
+ * shim vendor-specific (vs) ops
+ */
+
+static void intel_shim_vs_init(struct sdw_intel *sdw)
+{
+ void __iomem *shim_vs = sdw->link_res->shim_vs;
+ u16 act = 0;
+
+ u16p_replace_bits(&act, 0x1, SDW_SHIM2_INTEL_VS_ACTMCTL_DOAIS);
+ act |= SDW_SHIM2_INTEL_VS_ACTMCTL_DACTQE;
+ act |= SDW_SHIM2_INTEL_VS_ACTMCTL_DODS;
+ intel_writew(shim_vs, SDW_SHIM2_INTEL_VS_ACTMCTL, act);
+ usleep_range(10, 15);
+}
+
static int intel_link_power_up(struct sdw_intel *sdw)
{
struct sdw_bus *bus = &sdw->cdns.bus;
@@ -63,6 +79,9 @@ static int intel_link_power_up(struct sdw_intel *sdw)
*shim_mask |= BIT(link_id);

sdw->cdns.link_up = true;
+
+ intel_shim_vs_init(sdw);
+
out:
mutex_unlock(sdw->link_res->shim_lock);

--
2.25.1