Commit 95ec8c1d authored by Riana Tauro's avatar Riana Tauro Committed by Rodrigo Vivi
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drm/xe/pm: add debug logs for D3cold 



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: default avatarRiana Tauro <riana.tauro@intel.com>
Reviewed-by: default avatarBadal Nilawar <badal.nilawar@intel.com>
Signed-off-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240206055917.2629027-1-riana.tauro@intel.com
parent 404669db

drivers/gpu/drm/xe/xe_pm.c

+13 −6
Original line number Diff line number Diff line
@@ -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);