[PATCH v4 09/11] drm/xe/pm: D3Cold target state

[Badal Nilawar]

From: Anshuman Gupta <anshuman.gupta at intel.com>

Trade-off D3Cold target state based upon current vram usage.
If vram usage is greater than vram_d3cold_threshold and GPU
is VRSR capable target D3Cold state is D3Cold-VRSR
otherwise target state is D3Cold-Off.

Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>
---
 drivers/gpu/drm/xe/xe_pm.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_pm.c b/drivers/gpu/drm/xe/xe_pm.c
index b86e95493cb5..1e061bfc3e52 100644
--- a/drivers/gpu/drm/xe/xe_pm.c
+++ b/drivers/gpu/drm/xe/xe_pm.c
@@ -113,6 +113,14 @@ static void xe_rpm_lockmap_release(const struct xe_device *xe)
 			 &xe_pm_runtime_d3cold_map);
 }
 
+static void xe_pm_suspend_prepare(struct xe_device *xe)
+{
+	if (pm_suspend_target_state == PM_SUSPEND_TO_IDLE)
+		xe_pm_d3cold_target_state_toggle(xe);
+	else
+		xe->d3cold.target_state = XE_D3COLD_OFF;
+}
+
 /**
  * xe_pm_suspend - Helper for System suspend, i.e. S0->S3 / S0->S2idle
  * @xe: xe device instance
@@ -128,6 +136,8 @@ int xe_pm_suspend(struct xe_device *xe)
 	drm_dbg(&xe->drm, "Suspending device\n");
 	trace_xe_pm_suspend(xe, __builtin_return_address(0));
 
+	xe_pm_suspend_prepare(xe);
+
 	err = xe_pxp_pm_suspend(xe->pxp);
 	if (err)
 		goto err;
@@ -948,10 +958,14 @@ void xe_pm_d3cold_target_state_toggle(struct xe_device *xe)
 
 	if (total_vram_used_mb < xe->d3cold.vram_threshold)
 		xe->d3cold.target_state = XE_D3COLD_OFF;
+	else if (xe->d3cold.vrsr_capable)
+		xe->d3cold.target_state = XE_D3COLD_VRSR;
 	else
 		xe->d3cold.target_state = XE_D3HOT;
 
 	mutex_unlock(&xe->d3cold.lock);
+
+	drm_dbg(&xe->drm, "Xe D3cold target state %d\n", xe->d3cold.target_state);
 }
 
 /**
-- 
2.34.1