[PATCH 05/18] drm/amd/display: Fix warning in disabling vblank irq

[Tom Chung]

From: Alan Liu <haoping.liu at amd.com>

[Why]
During gpu-reset, we toggle vblank irq by calling dc_interrupt_set()
instead of amdgpu_irq_get/put() because we don't want to change the irq
source's refcount. However, we see the warning when vblank irq is enabled
by dc_interrupt_set() during gpu-reset but disabled by amdgpu_irq_put()
after gpu-reset.

[How]
Only in dm_gpureset_toggle_interrupts() we toggle vblank interrupts by
calling dc_interrupt_set(). Apart from this we call dm_set_vblank()
which uses amdgpu_irq_get/put() to operate vblank irq.

Reviewed-by: Bhawanpreet Lakha <bhawanpreet.lakha at amd.com>
Acked-by: Tom Chung <chiahsuan.chung at amd.com>
Signed-off-by: Alan Liu <haoping.liu at amd.com>
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 21 ++++++++++++-------
 .../amd/display/amdgpu_dm/amdgpu_dm_crtc.c    | 16 +++-----------
 2 files changed, 16 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 45b778631430..b8e0fc189002 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2474,20 +2474,25 @@ static void dm_gpureset_toggle_interrupts(struct amdgpu_device *adev,
 		if (acrtc && state->stream_status[i].plane_count != 0) {
 			irq_source = IRQ_TYPE_PFLIP + acrtc->otg_inst;
 			rc = dc_interrupt_set(adev->dm.dc, irq_source, enable) ? 0 : -EBUSY;
-			DRM_DEBUG_VBL("crtc %d - vupdate irq %sabling: r=%d\n",
-				      acrtc->crtc_id, enable ? "en" : "dis", rc);
 			if (rc)
 				DRM_WARN("Failed to %s pflip interrupts\n",
 					 enable ? "enable" : "disable");
 
 			if (enable) {
-				rc = amdgpu_dm_crtc_enable_vblank(&acrtc->base);
-				if (rc)
-					DRM_WARN("Failed to enable vblank interrupts\n");
-			} else {
-				amdgpu_dm_crtc_disable_vblank(&acrtc->base);
-			}
+				if (amdgpu_dm_crtc_vrr_active(to_dm_crtc_state(acrtc->base.state)))
+					rc = amdgpu_dm_crtc_set_vupdate_irq(&acrtc->base, true);
+			} else
+				rc = amdgpu_dm_crtc_set_vupdate_irq(&acrtc->base, false);
 
+			if (rc)
+				DRM_WARN("Failed to %sable vupdate interrupt\n", enable ? "en" : "dis");
+
+			irq_source = IRQ_TYPE_VBLANK + acrtc->otg_inst;
+			/* During gpu-reset we disable and then enable vblank irq, so
+			 * don't use amdgpu_irq_get/put() to avoid refcount change.
+			 */
+			if (!dc_interrupt_set(adev->dm.dc, irq_source, enable))
+				DRM_WARN("Failed to %sable vblank interrupt\n", enable ? "en" : "dis");
 		}
 	}
 
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
index e3762e806617..440fc0869a34 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
@@ -146,7 +146,6 @@ static void vblank_control_worker(struct work_struct *work)
 
 static inline int dm_set_vblank(struct drm_crtc *crtc, bool enable)
 {
-	enum dc_irq_source irq_source;
 	struct amdgpu_crtc *acrtc = to_amdgpu_crtc(crtc);
 	struct amdgpu_device *adev = drm_to_adev(crtc->dev);
 	struct dm_crtc_state *acrtc_state = to_dm_crtc_state(crtc->state);
@@ -169,18 +168,9 @@ static inline int dm_set_vblank(struct drm_crtc *crtc, bool enable)
 	if (rc)
 		return rc;
 
-	if (amdgpu_in_reset(adev)) {
-		irq_source = IRQ_TYPE_VBLANK + acrtc->otg_inst;
-		/* During gpu-reset we disable and then enable vblank irq, so
-		 * don't use amdgpu_irq_get/put() to avoid refcount change.
-		 */
-		if (!dc_interrupt_set(adev->dm.dc, irq_source, enable))
-			rc = -EBUSY;
-	} else {
-		rc = (enable)
-			? amdgpu_irq_get(adev, &adev->crtc_irq, acrtc->crtc_id)
-			: amdgpu_irq_put(adev, &adev->crtc_irq, acrtc->crtc_id);
-	}
+	rc = (enable)
+		? amdgpu_irq_get(adev, &adev->crtc_irq, acrtc->crtc_id)
+		: amdgpu_irq_put(adev, &adev->crtc_irq, acrtc->crtc_id);
 
 	if (rc)
 		return rc;
-- 
2.25.1