[PATCH 3/4] drm/i915: remove useless vblank wait form haswell_crtc_enable

[Paulo Zanoni <przanoni@gmail.com>]

From: Paulo Zanoni <paulo.r.zanoni@intel.com>

This function is called in a point where the pipe is not really
running (the fact that PIPECONF is enabled doesn't mean that the pipe
is actually running), so we pay the full 50ms timeout. Also, I
couldn't find a reason why this is needed, so just skip it.

I do have to notice we still have other vblank waits at later points
of the mode set sequence, and at least some of them make sense.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 2f546f7..69e8bb6 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3509,7 +3509,6 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
 	intel_update_watermarks(crtc);
 	intel_enable_pipe(dev_priv, pipe,
 			  intel_crtc->config.has_pch_encoder, false);
-	intel_wait_for_vblank(dev, pipe);
 
 	if (intel_crtc->config.has_pch_encoder)
 		lpt_pch_enable(crtc);
-- 
1.8.3.1