From: Michel Dänzer <[email protected]>

The vblank / page flip ioctls don't work as expected for a disabled CRTC.

(ported from radeon commit acc11877423ecd81a6e0a7f38466f80e43efee20)

Signed-off-by: Michel Dänzer <[email protected]>
---
 src/amdgpu_kms.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/amdgpu_kms.c b/src/amdgpu_kms.c
index 2efdbf5..3993591 100644
--- a/src/amdgpu_kms.c
+++ b/src/amdgpu_kms.c
@@ -257,7 +257,8 @@ amdgpu_scanout_do_update(xf86CrtcPtr xf86_crtc, int 
scanout_id)
        GCPtr gc;
        BoxRec extents;
 
-       if (drmmode_crtc->dpms_mode != DPMSModeOn ||
+       if (!xf86_crtc->enabled ||
+           drmmode_crtc->dpms_mode != DPMSModeOn ||
            !drmmode_crtc->scanout[scanout_id].pixmap)
                return FALSE;
 
@@ -323,7 +324,8 @@ amdgpu_scanout_update(xf86CrtcPtr xf86_crtc)
        DrawablePtr pDraw;
        BoxRec extents;
 
-       if (drmmode_crtc->scanout_update_pending ||
+       if (!xf86_crtc->enabled ||
+           drmmode_crtc->scanout_update_pending ||
            !drmmode_crtc->scanout[0].pixmap ||
            drmmode_crtc->dpms_mode != DPMSModeOn)
                return;
-- 
2.6.2

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