Introduce the helper to check if the device can signal a wakeup event while runtime suspended. This can avoid scheduling the HPD polling.
Assisted-by: GitHub_Copilot:claude-opus-5 Signed-off-by: Vinod Govindapillai <[email protected]> --- drivers/gpu/drm/xe/xe_pm.c | 21 +++++++++++++++++++++ drivers/gpu/drm/xe/xe_pm.h | 1 + 2 files changed, 22 insertions(+) diff --git a/drivers/gpu/drm/xe/xe_pm.c b/drivers/gpu/drm/xe/xe_pm.c index a5289a9df8d2..635bfb1c7f78 100644 --- a/drivers/gpu/drm/xe/xe_pm.c +++ b/drivers/gpu/drm/xe/xe_pm.c @@ -937,6 +937,27 @@ bool xe_pm_runtime_resume_and_get(struct xe_device *xe) return pm_runtime_resume_and_get(xe->drm.dev) >= 0; } +/** + * xe_pm_pme_supported - Can the device signal PME from its suspend target state? + * @xe: xe device instance + * + * Determine whether the device can generate a Power Management Event while + * runtime suspended. + * + * Return: true if PME is supported from the target state, false otherwise. + */ +bool xe_pm_pme_supported(struct xe_device *xe) +{ + struct pci_dev *pdev = to_pci_dev(xe->drm.dev); + + /* + * pci_dev_run_wake() checks dev->pme_support, verifies + * pci_pme_capable() against the state pci_target_state() picks, and + * walks upstream to confirm the wake can actually be routed. + */ + return pci_dev_run_wake(pdev); +} + /** * xe_pm_assert_unbounded_bridge - Disable PM on unbounded pcie parent bridge * @xe: xe device instance diff --git a/drivers/gpu/drm/xe/xe_pm.h b/drivers/gpu/drm/xe/xe_pm.h index 6d5ab09cb769..16b8699e59ec 100644 --- a/drivers/gpu/drm/xe/xe_pm.h +++ b/drivers/gpu/drm/xe/xe_pm.h @@ -30,6 +30,7 @@ bool xe_pm_runtime_get_if_active(struct xe_device *xe); bool xe_pm_runtime_get_if_in_use(struct xe_device *xe); void xe_pm_runtime_get_noresume(struct xe_device *xe); bool xe_pm_runtime_resume_and_get(struct xe_device *xe); +bool xe_pm_pme_supported(struct xe_device *xe); void xe_pm_assert_unbounded_bridge(struct xe_device *xe); int xe_pm_set_vram_threshold(struct xe_device *xe, u32 threshold); void xe_pm_d3cold_allowed_toggle(struct xe_device *xe); -- 2.43.0
