[PATCH 2/7] drm/i915: Extract intel_mode_vblank_end()

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

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

Extract intel_mode_vblank_end() in the same vein as
intel_mode_vblank_start(). While we have only one use
of this it seems nicer to unify the approach.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_vblank.c | 16 ++++++++++++----
 drivers/gpu/drm/i915/display/intel_vblank.h |  1 +
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_vblank.c b/drivers/gpu/drm/i915/display/intel_vblank.c
index 1f57596f8208..ba56015f2c40 100644
--- a/drivers/gpu/drm/i915/display/intel_vblank.c
+++ b/drivers/gpu/drm/i915/display/intel_vblank.c
@@ -312,12 +312,10 @@ static bool i915_get_crtc_scanoutpos(struct drm_crtc *_crtc,
 	hsync_start = mode->crtc_hsync_start;
 	vtotal = mode->crtc_vtotal;
 	vbl_start = intel_mode_vblank_start(mode);
-	vbl_end = mode->crtc_vblank_end;
+	vbl_end = intel_mode_vblank_end(mode);
 
-	if (mode->flags & DRM_MODE_FLAG_INTERLACE) {
-		vbl_end /= 2;
+	if (mode->flags & DRM_MODE_FLAG_INTERLACE)
 		vtotal /= 2;
-	}
 
 	/*
 	 * Enter vblank critical section, as we will do multiple
@@ -584,6 +582,16 @@ int intel_mode_vblank_start(const struct drm_display_mode *mode)
 	return vblank_start;
 }
 
+int intel_mode_vblank_end(const struct drm_display_mode *mode)
+{
+	int vblank_end = mode->crtc_vblank_end;
+
+	if (mode->flags & DRM_MODE_FLAG_INTERLACE)
+		vblank_end /= 2;
+
+	return vblank_end;
+}
+
 void intel_vblank_evade_init(const struct intel_crtc_state *old_crtc_state,
 			     const struct intel_crtc_state *new_crtc_state,
 			     struct intel_vblank_evade_ctx *evade)
diff --git a/drivers/gpu/drm/i915/display/intel_vblank.h b/drivers/gpu/drm/i915/display/intel_vblank.h
index 08825a4d8fb7..6f11fd070f19 100644
--- a/drivers/gpu/drm/i915/display/intel_vblank.h
+++ b/drivers/gpu/drm/i915/display/intel_vblank.h
@@ -21,6 +21,7 @@ struct intel_vblank_evade_ctx {
 };
 
 int intel_mode_vblank_start(const struct drm_display_mode *mode);
+int intel_mode_vblank_end(const struct drm_display_mode *mode);
 
 void intel_vblank_evade_init(const struct intel_crtc_state *old_crtc_state,
 			     const struct intel_crtc_state *new_crtc_state,
-- 
2.44.1