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platform/x86/intel/pmc/mtl: Put GNA/IPU/VPU devices in D3

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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>
This commit is contained in:
David E. Box 2023-04-09 12:25:35 -07:00 committed by Hans de Goede
parent 8d99129eef
commit 336ba968d3
1 changed files with 31 additions and 0 deletions
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31
drivers/platform/x86/intel/pmc/mtl.c
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@ -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);
}