diff options
| -rw-r--r-- | drivers/platform/x86/intel/pmc/mtl.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/platform/x86/intel/pmc/mtl.c b/drivers/platform/x86/intel/pmc/mtl.c index eeb3bd8c2502..e8cc156412ce 100644 --- a/drivers/platform/x86/intel/pmc/mtl.c +++ b/drivers/platform/x86/intel/pmc/mtl.c @@ -8,6 +8,7 @@ * */ +#include <linux/pci.h> #include "core.h" const struct pmc_reg_map mtl_reg_map = { @@ -45,8 +46,38 @@ void mtl_core_configure(struct pmc_dev *pmcdev) pmc_core_send_ltr_ignore(pmcdev, 3); } +#define MTL_GNA_PCI_DEV 0x7e4c +#define MTL_IPU_PCI_DEV 0x7d19 +#define MTL_VPU_PCI_DEV 0x7d1d +static void mtl_set_device_d3(unsigned int device) +{ + struct pci_dev *pcidev; + + pcidev = pci_get_device(PCI_VENDOR_ID_INTEL, device, NULL); + if (pcidev) { + if (!device_trylock(&pcidev->dev)) { + pci_dev_put(pcidev); + return; + } + if (!pcidev->dev.driver) { + dev_info(&pcidev->dev, "Setting to D3hot\n"); + pci_set_power_state(pcidev, PCI_D3hot); + } + device_unlock(&pcidev->dev); + pci_dev_put(pcidev); + } +} + void mtl_core_init(struct pmc_dev *pmcdev) { pmcdev->map = &mtl_reg_map; pmcdev->core_configure = mtl_core_configure; + + /* + * Set power state of select devices that do not have drivers to D3 + * so that they do not block Package C entry. + */ + mtl_set_device_d3(MTL_GNA_PCI_DEV); + mtl_set_device_d3(MTL_IPU_PCI_DEV); + mtl_set_device_d3(MTL_VPU_PCI_DEV); } |