From: Tilak Tangudu <tilak.tangudu@xxxxxxxxx>
Added lmem deep suspend/resume, which covers lmem
eviction and added GT/GUC deep suspend/resume
using i915_gem_backup_suspend, i915_gem_suspend_late
and i915_gem_resume.
Signed-off-by: Tilak Tangudu <tilak.tangudu@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_driver.c | 74 ++++++++++++++++++++++++------
1 file changed, 61 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c
index 3697ecb2c138..608287bb27ea 100644
--- a/drivers/gpu/drm/i915/i915_driver.c
+++ b/drivers/gpu/drm/i915/i915_driver.c
@@ -1630,6 +1630,7 @@ static int intel_runtime_idle(struct device *kdev)
static int intel_runtime_suspend(struct device *kdev)
{
struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
+ struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
struct intel_runtime_pm *rpm = &dev_priv->runtime_pm;
int ret;
@@ -1644,9 +1645,14 @@ static int intel_runtime_suspend(struct device *kdev)
* We are safe here against re-faults, since the fault handler takes
* an RPM reference.
*/
- i915_gem_runtime_suspend(dev_priv);
-
- intel_gt_runtime_suspend(to_gt(dev_priv));
+ if (rpm->d3_state == INTEL_D3COLD_OFF) {
+ i915_gem_backup_suspend(dev_priv);
+ i915_ggtt_suspend(to_gt(dev_priv)->ggtt);
+ i915_gem_suspend_late(dev_priv);
+ } else {
+ i915_gem_runtime_suspend(dev_priv);
+ intel_gt_runtime_suspend(to_gt(dev_priv));
+ }
intel_runtime_pm_disable_interrupts(dev_priv);
@@ -1691,14 +1697,18 @@ static int intel_runtime_suspend(struct device *kdev)
*/
intel_opregion_notify_adapter(dev_priv, PCI_D3hot);
} else {
- /*
- * current versions of firmware which depend on this opregion
- * notification have repurposed the D1 definition to mean
- * "runtime suspended" vs. what you would normally expect (D3)
- * to distinguish it from notifications that might be sent via
- * the suspend path.
- */
- intel_opregion_notify_adapter(dev_priv, PCI_D1);
+ if (rpm->d3_state == INTEL_D3COLD_OFF) {
+ intel_opregion_suspend(dev_priv, PCI_D3cold);
+ } else {
+ /*
+ * current versions of firmware which depend on this opregion
+ * notification have repurposed the D1 definition to mean
+ * "runtime suspended" vs. what you would normally expect (D3)
+ * to distinguish it from notifications that might be sent via
+ * the suspend path.
+ */
+ intel_opregion_notify_adapter(dev_priv, PCI_D1);
+ }
}
assert_forcewakes_inactive(&dev_priv->uncore);
@@ -1706,6 +1716,12 @@ static int intel_runtime_suspend(struct device *kdev)
if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv))
intel_hpd_poll_enable(dev_priv);
+ if (rpm->d3_state == INTEL_D3COLD_OFF) {
+ i915_save_pci_state(pdev);
+ pci_disable_device(pdev);
+ pci_set_power_state(pdev, PCI_D3cold);
+ }
+
drm_dbg(&dev_priv->drm, "Device suspended\n");
return 0;
}
@@ -1713,6 +1729,7 @@ static int intel_runtime_suspend(struct device *kdev)
static int intel_runtime_resume(struct device *kdev)
{
struct drm_i915_private *dev_priv = kdev_to_i915(kdev);
+ struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
struct intel_runtime_pm *rpm = &dev_priv->runtime_pm;
int ret;
@@ -1724,7 +1741,25 @@ static int intel_runtime_resume(struct device *kdev)
drm_WARN_ON_ONCE(&dev_priv->drm, atomic_read(&rpm->wakeref_count));
disable_rpm_wakeref_asserts(rpm);
- intel_opregion_notify_adapter(dev_priv, PCI_D0);
+ if (rpm->d3_state == INTEL_D3COLD_OFF) {
+ ret = pci_set_power_state(pdev, PCI_D0);
+ if (ret) {
+ drm_err(&dev_priv->drm,
+ "failed to set PCI D0 power state (%d)\n", ret);
+ goto out;
+ }
+
+ i915_load_pci_state(pdev);
+
+ ret = pci_enable_device(pdev);
+ if (ret)
+ goto out;
+ pci_set_master(pdev);
+ intel_opregion_resume(dev_priv);
+ } else {
+ intel_opregion_notify_adapter(dev_priv, PCI_D0);
+ }
+
rpm->suspended = false;
if (intel_uncore_unclaimed_mmio(&dev_priv->uncore))
drm_dbg(&dev_priv->drm,
@@ -1742,8 +1777,20 @@ static int intel_runtime_resume(struct device *kdev)
* No point of rolling back things in case of an error, as the best
* we can do is to hope that things will still work (and disable RPM).
*/
- intel_gt_runtime_resume(to_gt(dev_priv));
+ if (rpm->d3_state == INTEL_D3COLD_OFF) {
+ ret = i915_pcode_init(dev_priv);
+ if (ret)
+ goto out;
+ sanitize_gpu(dev_priv);
+ ret = i915_ggtt_enable_hw(dev_priv);
+ if (ret)
+ drm_err(&dev_priv->drm, "failed to re-enable GGTT\n");
+ i915_ggtt_resume(to_gt(dev_priv)->ggtt);
+ i915_gem_resume(dev_priv);
+ } else {
+ intel_gt_runtime_resume(to_gt(dev_priv));
+ }
/*
* On VLV/CHV display interrupts are part of the display
* power well, so hpd is reinitialized from there. For
@@ -1756,6 +1803,7 @@ static int intel_runtime_resume(struct device *kdev)
intel_enable_ipc(dev_priv);
+out:
enable_rpm_wakeref_asserts(rpm);
if (ret)
--
2.25.1
