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ASoC: Intel: Skylake: Disable SRAM Retention before D3

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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>
This commit is contained in:
Dharageswari R 2016-06-03 18:29:37 +05:30 committed by Mark Brown
parent 1ae7ca041a
commit 51a01b8c2e
2 changed files with 5 additions and 0 deletions
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3
sound/soc/intel/skylake/skl.c
View File

@ -186,6 +186,7 @@ static int _skl_suspend(struct hdac_ext_bus *ebus)
{
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 @@ static int _skl_suspend(struct hdac_ext_bus *ebus)
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);

2
sound/soc/intel/skylake/skl.h
View File

@ -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)