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drm/xe/pm: add debug logs for D3cold

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add additional debug logs for PME# capability and
presence of ACPI _PR3 resources. This is to identify
the reason why the card is not capable of D3cold.

No functional changes

Signed-off-by: Riana Tauro <riana.tauro@intel.com>
Reviewed-by: Badal Nilawar <badal.nilawar@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240206055917.2629027-1-riana.tauro@intel.com
This commit is contained in:
Riana Tauro
2024-02-06 11:29:17 +05:30
committed by Rodrigo Vivi
parent 404669db60
commit 95ec8c1d6c
1 changed files with 13 additions and 6 deletions
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19
drivers/gpu/drm/xe/xe_pm.c
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@@ -125,17 +125,26 @@ int xe_pm_resume(struct xe_device *xe)
return 0;
}
static bool xe_pm_pci_d3cold_capable(struct pci_dev *pdev)
static bool xe_pm_pci_d3cold_capable(struct xe_device *xe)
{
struct pci_dev *pdev = to_pci_dev(xe->drm.dev);
struct pci_dev *root_pdev;
root_pdev = pcie_find_root_port(pdev);
if (!root_pdev)
return false;
/* D3Cold requires PME capability and _PR3 power resource */
if (!pci_pme_capable(root_pdev, PCI_D3cold) || !pci_pr3_present(root_pdev))
/* D3Cold requires PME capability */
if (!pci_pme_capable(root_pdev, PCI_D3cold)) {
drm_dbg(&xe->drm, "d3cold: PME# not supported\n");
return false;
}
/* D3Cold requires _PR3 power resource */
if (!pci_pr3_present(root_pdev)) {
drm_dbg(&xe->drm, "d3cold: ACPI _PR3 not present\n");
return false;
}
return true;
}
@@ -171,15 +180,13 @@ void xe_pm_init_early(struct xe_device *xe)
void xe_pm_init(struct xe_device *xe)
{
struct pci_dev *pdev = to_pci_dev(xe->drm.dev);
/* For now suspend/resume is only allowed with GuC */
if (!xe_device_uc_enabled(xe))
return;
drmm_mutex_init(&xe->drm, &xe->d3cold.lock);
xe->d3cold.capable = xe_pm_pci_d3cold_capable(pdev);
xe->d3cold.capable = xe_pm_pci_d3cold_capable(xe);
if (xe->d3cold.capable) {
xe_device_sysfs_init(xe);