Re: [v4,10/11] drm/xe/vrsr: Enable VRSR

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On 24-06-2025 17:15, Poosa, Karthik wrote:

On 29-05-2025 16:46, Badal Nilawar wrote:
From: Anshuman Gupta <anshuman.gupta@xxxxxxxxx>

Enabling VRSR in runtime suspend and also in System wide suspend.

This can be rephrased to -

Integrate VRSR into both system-wide and runtime suspend-resume flows.

I will drop gerund.  So it will be "Enable VRSR  in runtime suspend and in System wide suspend".

Thanks,
Badal


Also fix couple of typo in xe_pm.c.

Signed-off-by: Anshuman Gupta <anshuman.gupta@xxxxxxxxx>
Signed-off-by: Badal Nilawar <badal.nilawar@xxxxxxxxx>
---
  drivers/gpu/drm/xe/xe_pci.c |  4 ++--
  drivers/gpu/drm/xe/xe_pm.c  | 46 +++++++++++++++++++++++++++----------
  2 files changed, 36 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_pci.c b/drivers/gpu/drm/xe/xe_pci.c
index 5ae1df345416..fdf878594fb0 100644
--- a/drivers/gpu/drm/xe/xe_pci.c
+++ b/drivers/gpu/drm/xe/xe_pci.c
@@ -926,7 +926,7 @@ static int xe_pci_suspend(struct device *dev)
        /*
       * Enabling D3Cold is needed for S2Idle/S0ix.
-     * It is save to allow here since xe_pm_suspend has evicted
+     * It is safe to allow here since xe_pm_suspend has evicted
       * the local memory and the direct complete optimization is disabled.
       */
      d3cold_toggle(pdev, D3COLD_ENABLE);
@@ -943,7 +943,7 @@ static int xe_pci_resume(struct device *dev)
      struct pci_dev *pdev = to_pci_dev(dev);
      int err;
  -    /* Give back the D3Cold decision to the runtime P M*/
+    /* Give back the D3Cold decision to the runtime PM */
      d3cold_toggle(pdev, D3COLD_DISABLE);
        err = pci_set_power_state(pdev, PCI_D0);
diff --git a/drivers/gpu/drm/xe/xe_pm.c b/drivers/gpu/drm/xe/xe_pm.c
index 1e061bfc3e52..19596d467298 100644
--- a/drivers/gpu/drm/xe/xe_pm.c
+++ b/drivers/gpu/drm/xe/xe_pm.c
@@ -147,10 +147,12 @@ int xe_pm_suspend(struct xe_device *xe)
        xe_display_pm_suspend(xe);
  -    /* FIXME: Super racey... */
-    err = xe_bo_evict_all(xe);
-    if (err)
-        goto err_pxp;
+    if (xe->d3cold.target_state == XE_D3COLD_OFF) {
+        /* FIXME: Super racey... */
+        err = xe_bo_evict_all(xe);
+        if (err)
+            goto err_pxp;
+    }
        for_each_gt(gt, xe, id) {
          err = xe_gt_suspend(gt);
@@ -162,6 +164,12 @@ int xe_pm_suspend(struct xe_device *xe)
        xe_display_pm_suspend_late(xe);
  +    if (xe->d3cold.target_state == XE_D3COLD_VRSR) {
+        err = xe_pm_vrsr_enable(xe, true);
+            if (err)
+                goto err_display;
+    }
+
      drm_dbg(&xe->drm, "Device suspended\n");
      return 0;
  @@ -203,9 +211,11 @@ int xe_pm_resume(struct xe_device *xe)
       * This only restores pinned memory which is the memory required for the
       * GT(s) to resume.
       */
-    err = xe_bo_restore_early(xe);
-    if (err)
-        goto err;
+    if (xe->d3cold.target_state == XE_D3COLD_OFF) {
+        err = xe_bo_restore_early(xe);
+        if (err)
+            goto err;
+    }
        xe_irq_resume(xe);
  @@ -214,9 +224,11 @@ int xe_pm_resume(struct xe_device *xe)
        xe_display_pm_resume(xe);
  -    err = xe_bo_restore_late(xe);
-    if (err)
-        goto err;
+    if (xe->d3cold.target_state == XE_D3COLD_OFF) {
+        err = xe_bo_restore_late(xe);
+        if (err)
+            goto err;
+    }
        xe_pxp_pm_resume(xe->pxp);
  @@ -616,7 +628,7 @@ int xe_pm_runtime_suspend(struct xe_device *xe)
        xe_display_pm_runtime_suspend(xe);
  -    if (xe->d3cold.target_state) {
+    if (xe->d3cold.target_state == XE_D3COLD_OFF) {
          err = xe_bo_evict_all(xe);
          if (err)
              goto out_resume;
@@ -632,6 +644,14 @@ int xe_pm_runtime_suspend(struct xe_device *xe)
        xe_display_pm_runtime_suspend_late(xe);
  +    if (xe->d3cold.target_state == XE_D3COLD_VRSR) {
+        err = xe_pm_vrsr_enable(xe, true);
+            if (err) {
+                drm_err(&xe->drm, "Failed to enable VRSR: %d\n", err);
+                goto out_resume;
+            }
+    }
+
      xe_rpm_lockmap_release(xe);
      xe_pm_write_callback_task(xe, NULL);
      return 0;
@@ -669,7 +689,9 @@ int xe_pm_runtime_resume(struct xe_device *xe)
              goto out;
            xe_display_pm_resume_early(xe);
+    }
  +    if (xe->d3cold.target_state == XE_D3COLD_OFF) {
          /*
           * This only restores pinned memory which is the memory
           * required for the GT(s) to resume.
@@ -686,7 +708,7 @@ int xe_pm_runtime_resume(struct xe_device *xe)
        xe_display_pm_runtime_resume(xe);
  -    if (xe->d3cold.target_state) {
+    if (xe->d3cold.target_state == XE_D3COLD_OFF) {
          err = xe_bo_restore_late(xe);
          if (err)
              goto out;

Please rephrase commit message. Other than that, code code flow looks fine.

Acked-by: Karthik Poosa <karthik.poosa@xxxxxxxxx>





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