commit ddbb5313502f89fb41dbec209427f1a21f628441
author Emily Deng <Emily.Deng@amd.com> Mon Aug 21 09:51:10 2017 +0800
committer Alex Deucher <alexander.deucher@amd.com> Tue Aug 29 15:27:38 2017 -0400
tree 9fa0d38ffca83fa416a897cc1c96d8140e76ca4c
parent 38a8791aa7bfaa497e12e56b904a6b45986162d8

drm/amdgpu/virtual_dce: Virtual display doesn't support disable vblank immediately

For virtual display, it uses software timer to emulate the vsync interrupt,
it doesn't have high precision, so doesn't support disable vblank immediately.

BUG: SWDEV-129274

Signed-off-by: Emily Deng <Emily.Deng@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
index 4bdd851..538e5f2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
@@ -221,8 +221,9 @@ int amdgpu_irq_init(struct amdgpu_device *adev)
 
 	spin_lock_init(&adev->irq.lock);
 
-	/* Disable vblank irqs aggressively for power-saving */
-	adev->ddev->vblank_disable_immediate = true;
+	if (!adev->enable_virtual_display)
+		/* Disable vblank irqs aggressively for power-saving */
+		adev->ddev->vblank_disable_immediate = true;
 
 	r = drm_vblank_init(adev->ddev, adev->mode_info.num_crtc);
 	if (r) {