[PATCH v6 08/11] modesetting: Suspend and resume flipping with DPMS

[Alex Goins]

DPMS would prevent page flip / vblank events from being raised, freezing
the screen until PRIME flipping was reinitialized. To handle DPMS cleanly,
suspend PRIME page flipping when DPMS mode is not on, and resume it when
DPMS mode is on.

v1: Initial commit
v2: Moved flipping_active check from previous commit to here
v3: Unchanged
v4: Unchanged
v5: Move flipping_active check to sink support commit
v6: Rebase onto ToT

Signed-off-by: Alex Goins <agoins at nvidia.com>
---
 hw/xfree86/drivers/modesetting/drmmode_display.c | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/hw/xfree86/drivers/modesetting/drmmode_display.c b/hw/xfree86/drivers/modesetting/drmmode_display.c
index 0720103..4fa2183 100644
--- a/hw/xfree86/drivers/modesetting/drmmode_display.c
+++ b/hw/xfree86/drivers/modesetting/drmmode_display.c
@@ -1400,12 +1400,22 @@ drmmode_output_dpms(xf86OutputPtr output, int mode)
     drmModeConnectorSetProperty(drmmode->fd, koutput->connector_id,
                                 drmmode_output->dpms_enum_id, mode);
 
-    if (mode == DPMSModeOn && crtc) {
+    if (crtc) {
         drmmode_crtc_private_ptr drmmode_crtc = crtc->driver_private;
-        if (drmmode_crtc->need_modeset)
-            drmmode_set_mode_major(crtc, &crtc->mode, crtc->rotation,
-                                   crtc->x, crtc->y);
+
+        if (mode == DPMSModeOn) {
+            if (drmmode_crtc->need_modeset)
+                drmmode_set_mode_major(crtc, &crtc->mode, crtc->rotation,
+                                       crtc->x, crtc->y);
+
+            if (drmmode_crtc->enable_flipping)
+                drmmode_InitSharedPixmapFlipping(crtc, drmmode_crtc->drmmode);
+        } else {
+            if (drmmode_crtc->enable_flipping)
+                drmmode_FiniSharedPixmapFlipping(crtc, drmmode_crtc->drmmode);
+        }
     }
+
     return;
 }
 
-- 
1.9.1