drm/xe/display: Improve s2idle handling.

We accidentally always pass true as s2idle argument, instead of
calculating it in the same way as i915.

Suspend modes were removed to achieve compatibility with i915, but
accidentally left in the source code.

While at it, fix all other cases too, s2idle will go into a D1 state and
setting a lower power state should be handled by PCI core.

Maybe my laptop stops draining so much power during suspend now? I can
only hope..

Signed-off-by: Maarten Lankhorst <[email protected]>
Reviewed-by: Rodrigo Vivi <[email protected]>
Signed-off-by: Rodrigo Vivi <[email protected]>

3 files changed, 4 insertions, 14 deletions

diff --git a/drivers/gpu/drm/xe/compat-i915-headers/intel_runtime_pm.h b/drivers/gpu/drm/xe/compat-i915-headers/intel_runtime_pm.h
index f7f3286e2c53..89da3cc62f39 100644
--- a/drivers/gpu/drm/xe/compat-i915-headers/intel_runtime_pm.h
+++ b/drivers/gpu/drm/xe/compat-i915-headers/intel_runtime_pm.h
@@ -5,12 +5,6 @@
 
 #include "intel_wakeref.h"
 
-enum i915_drm_suspend_mode {
-	I915_DRM_SUSPEND_IDLE,
-	I915_DRM_SUSPEND_MEM,
-	I915_DRM_SUSPEND_HIBERNATE,
-};
-
 #define intel_runtime_pm xe_runtime_pm
 
 static inline void disable_rpm_wakeref_asserts(void *rpm)
diff --git a/drivers/gpu/drm/xe/xe_display.c b/drivers/gpu/drm/xe/xe_display.c
index edfc7fce1ed3..fa20faf3cc83 100644
--- a/drivers/gpu/drm/xe/xe_display.c
+++ b/drivers/gpu/drm/xe/xe_display.c
@@ -321,6 +321,7 @@ static void intel_suspend_encoders(struct xe_device *xe)
 
 void xe_display_pm_suspend(struct xe_device *xe)
 {
+	bool s2idle = acpi_target_system_state() < ACPI_STATE_S3;
 	if (!xe->info.enable_display)
 		return;
 
@@ -340,7 +341,7 @@ void xe_display_pm_suspend(struct xe_device *xe)
 
 	intel_suspend_encoders(xe);
 
-	intel_opregion_suspend(xe, PCI_D3cold);
+	intel_opregion_suspend(xe, s2idle ? PCI_D1 : PCI_D3cold);
 
 	intel_fbdev_set_suspend(&xe->drm, FBINFO_STATE_SUSPENDED, true);
 
@@ -349,10 +350,11 @@ void xe_display_pm_suspend(struct xe_device *xe)
 
 void xe_display_pm_suspend_late(struct xe_device *xe)
 {
+	bool s2idle = acpi_target_system_state() < ACPI_STATE_S3;
 	if (!xe->info.enable_display)
 		return;
 
-	intel_power_domains_suspend(xe, I915_DRM_SUSPEND_MEM);
+	intel_power_domains_suspend(xe, s2idle);
 
 	intel_display_power_suspend_late(xe);
 }
diff --git a/drivers/gpu/drm/xe/xe_pci.c b/drivers/gpu/drm/xe/xe_pci.c
index 05c6b6df8210..097b68598191 100644
--- a/drivers/gpu/drm/xe/xe_pci.c
+++ b/drivers/gpu/drm/xe/xe_pci.c
@@ -795,10 +795,6 @@ static int xe_pci_suspend(struct device *dev)
 	pci_save_state(pdev);
 	pci_disable_device(pdev);
 
-	err = pci_set_power_state(pdev, PCI_D3hot);
-	if (err)
-		return err;
-
 	return 0;
 }
 
@@ -814,8 +810,6 @@ static int xe_pci_resume(struct device *dev)
 	if (err)
 		return err;
 
-	pci_restore_state(pdev);
-
 	err = pci_enable_device(pdev);
 	if (err)
 		return err;