[RFC 4/6] drm/xe/vrsr: Refactor d3cold.allowed to a enum

[Anshuman Gupta <anshuman.gupta@xxxxxxxxx>]

Add xe_d3_state enum to add support for VRAM Self Refresh
d3cold state.

Signed-off-by: Anshuman Gupta <anshuman.gupta@xxxxxxxxx>
---
 drivers/gpu/drm/xe/xe_device_types.h | 5 +++--
 drivers/gpu/drm/xe/xe_pm.c           | 6 +++---
 drivers/gpu/drm/xe/xe_pm.h           | 6 ++++++
 3 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_device_types.h b/drivers/gpu/drm/xe/xe_device_types.h
index da7946b75cd5..937461939ecc 100644
--- a/drivers/gpu/drm/xe/xe_device_types.h
+++ b/drivers/gpu/drm/xe/xe_device_types.h
@@ -19,6 +19,7 @@
 #include "xe_memirq_types.h"
 #include "xe_oa_types.h"
 #include "xe_platform_types.h"
+#include "xe_pm.h"
 #include "xe_pmu_types.h"
 #include "xe_pt_types.h"
 #include "xe_sriov_types.h"
@@ -488,8 +489,8 @@ struct xe_device {
 		/** @d3cold.capable: Indicates if root port is d3cold capable */
 		bool capable;
 
-		/** @d3cold.allowed: Indicates if d3cold is a valid device state */
-		bool allowed;
+		/** @d3cold.allowed: Indicates d3cold target state */
+		enum xe_d3_state allowed;
 
 		/** @d3cold.vrsr_capable: Indicates if d3cold VRAM Self Refresh is supported */
 		bool vrsr_capable;
diff --git a/drivers/gpu/drm/xe/xe_pm.c b/drivers/gpu/drm/xe/xe_pm.c
index 32583651988f..81e67b5693dc 100644
--- a/drivers/gpu/drm/xe/xe_pm.c
+++ b/drivers/gpu/drm/xe/xe_pm.c
@@ -859,7 +859,7 @@ void xe_pm_d3cold_allowed_toggle(struct xe_device *xe)
 	int i;
 
 	if (!xe->d3cold.capable) {
-		xe->d3cold.allowed = false;
+		xe->d3cold.allowed = XE_D3HOT;
 		return;
 	}
 
@@ -874,9 +874,9 @@ void xe_pm_d3cold_allowed_toggle(struct xe_device *xe)
 	mutex_lock(&xe->d3cold.lock);
 
 	if (total_vram_used_mb < xe->d3cold.vram_threshold)
-		xe->d3cold.allowed = true;
+		xe->d3cold.allowed = XE_D3COLD_OFF;
 	else
-		xe->d3cold.allowed = false;
+		xe->d3cold.allowed = XE_D3HOT;
 
 	mutex_unlock(&xe->d3cold.lock);
 }
diff --git a/drivers/gpu/drm/xe/xe_pm.h b/drivers/gpu/drm/xe/xe_pm.h
index c9f176912b46..b7b74757ce21 100644
--- a/drivers/gpu/drm/xe/xe_pm.h
+++ b/drivers/gpu/drm/xe/xe_pm.h
@@ -12,6 +12,12 @@
 
 struct xe_device;
 
+enum xe_d3_state {
+	XE_D3HOT = 0,
+	XE_D3COLD_OFF,
+	XE_D3COLD_VRSR,
+};
+
 int xe_pm_suspend(struct xe_device *xe);
 int xe_pm_resume(struct xe_device *xe);
 
-- 
2.34.1