[PATCH 2/9] drm/i915: Reorder drm_vblank_put() vs. need_vlv_dsi_wa

[Ville Syrjala <ville.syrjala@linux.intel.com>]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Drop the vblank reference only after we've done the hideous
need_vlv_dsi_wa stuff. This will make it easier to reuse the
the vblank evasion machinery elsewhere.

Keeping the vblank reference for a bit longer is not a
problem. In fact we might want to not drop it at all until
intel_pipe_update_end(), but we'll leave that idea for later.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_crtc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_crtc.c b/drivers/gpu/drm/i915/display/intel_crtc.c
index d5c3f6078e42..4df8927bb062 100644
--- a/drivers/gpu/drm/i915/display/intel_crtc.c
+++ b/drivers/gpu/drm/i915/display/intel_crtc.c
@@ -614,8 +614,6 @@ void intel_pipe_update_start(struct intel_atomic_state *state,
 
 	finish_wait(wq, &wait);
 
-	drm_crtc_vblank_put(&crtc->base);
-
 	/*
 	 * On VLV/CHV DSI the scanline counter would appear to
 	 * increment approx. 1/3 of a scanline before start of vblank.
@@ -634,6 +632,8 @@ void intel_pipe_update_start(struct intel_atomic_state *state,
 	while (need_vlv_dsi_wa && scanline == vblank_start)
 		scanline = intel_get_crtc_scanline(crtc);
 
+	drm_crtc_vblank_put(&crtc->base);
+
 	crtc->debug.scanline_start = scanline;
 	crtc->debug.start_vbl_time = ktime_get();
 	crtc->debug.start_vbl_count = intel_crtc_get_vblank_counter(crtc);
-- 
2.41.0