[Intel-gfx] [PATCH 2/2] drm/i915: make userspace mode sets asynchronous

[Jesse Barnes]

Now that we can queue CRTC enable/disable calls for later, we can allow
userspace mode sets to return immediately.  This may mean that userspace
will draw into a buffer that's not yet displayed (which is fine) or that
it may draw into a buffer it thinks is no longer displayed (which could
lead to some visual artifacts until the mode set completes, but is
otherwise harmless).  Page flip and cursor activity will synchronize
with any outstanding activity to avoid problems with the display being
off for those operations.

It should be possible to queue those ops as well though and further
de-couple driver updates of the hw state from userspace queueing of
commands.

Signed-off-by: Jesse Barnes <jbarnes at virtuousgeek.org>
---
 drivers/gpu/drm/i915/intel_display.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 8c52038..74310b5 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -10545,10 +10545,6 @@ static int intel_set_mode(struct drm_crtc *crtc,
 
 	ret = __intel_set_mode(crtc, mode, x, y, fb);
 
-	intel_sync_crtcs(crtc->dev->dev_private);
-	if (ret == 0)
-		intel_modeset_check_state(crtc->dev);
-
 	return ret;
 }
 
-- 
1.9.1