ASoC: Intel: Skylake: Disable SRAM Retention before D3
SW needs to set the PGCTL.LSRMD = 1 to disable LPSRAM retention
feature,otherwise it may lead to SRAM ECC Errors.
Signed-off-by: Dharageswari R <dharageswari.r@intel.com>
Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/intel/skylake/skl.c b/sound/soc/intel/skylake/skl.c
index 55c301b..cb3eb41 100644
--- a/sound/soc/intel/skylake/skl.c
+++ b/sound/soc/intel/skylake/skl.c
@@ -186,6 +186,7 @@
{
struct skl *skl = ebus_to_skl(ebus);
struct hdac_bus *bus = ebus_to_hbus(ebus);
+ struct pci_dev *pci = to_pci_dev(bus->dev);
int ret;
snd_hdac_ext_bus_link_power_down_all(ebus);
@@ -195,6 +196,8 @@
return ret;
snd_hdac_bus_stop_chip(bus);
+ update_pci_dword(pci, AZX_PCIREG_PGCTL,
+ AZX_PGCTL_LSRMD_MASK, AZX_PGCTL_LSRMD_MASK);
skl_enable_miscbdcge(bus->dev, false);
snd_hdac_bus_enter_link_reset(bus);
skl_enable_miscbdcge(bus->dev, true);
diff --git a/sound/soc/intel/skylake/skl.h b/sound/soc/intel/skylake/skl.h
index f66be17..25b8d48 100644
--- a/sound/soc/intel/skylake/skl.h
+++ b/sound/soc/intel/skylake/skl.h
@@ -48,6 +48,8 @@
#define AZX_REG_VS_SDXEFIFOS_XBASE 0x1094
#define AZX_REG_VS_SDXEFIFOS_XINTERVAL 0x20
+#define AZX_PCIREG_PGCTL 0x44
+#define AZX_PGCTL_LSRMD_MASK (1 << 4)
#define AZX_PCIREG_CGCTL 0x48
#define AZX_CGCTL_MISCBDCGE_MASK (1 << 6)