diff options
| author | David E. Box <david.e.box@linux.intel.com> | 2023-04-09 12:25:35 -0700 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2023-04-11 10:41:48 +0200 |
| commit | 336ba968d3e30038c13b03a71f5a672db6c9e303 (patch) | |
| tree | 114e37e7823cad34ba176ca4643cd9c0ac408eb1 /drivers/platform | |
| parent | 8d99129eef8f42377b41c1bacee9f8ce806e9f44 (diff) | |
platform/x86/intel/pmc/mtl: Put GNA/IPU/VPU devices in D3
On Meteor Lake, the GNA, IPU, and VPU devices are booted in D0 power state
and will block the SoC from going into the deepest Package C-state if a
driver is not present. Put each device in D3hot if no driver is found.
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20230409192535.914540-1-david.e.box@linux.intel.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'drivers/platform')
| -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); } |