[PATCH v3 06/11] drm/i915: split intel_crtc_page_flip() into check() and commit()

[Gustavo Padovan <gustavo@padovan.org>]

From: Daniel Stone <daniels@collabora.com>

Start the work of splitting the intel_crtc_page_flip() for later use
by the atomic modesetting API.

Signed-off-by: Daniel Stone <daniels@collabora.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
---
 drivers/gpu/drm/i915/intel_display.c | 51 ++++++++++++++++++++++++++----------
 1 file changed, 37 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index a583abd..3cb092c 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9641,23 +9641,11 @@ void intel_check_page_flip(struct drm_device *dev, int pipe)
 	spin_unlock(&dev->event_lock);
 }
 
-static int intel_crtc_page_flip(struct drm_crtc *crtc,
-				struct drm_framebuffer *fb,
-				struct drm_pending_vblank_event *event,
-				uint32_t page_flip_flags)
+static int intel_crtc_check_page_flip(struct drm_crtc *crtc,
+				      struct drm_framebuffer *fb)
 {
 	struct drm_device *dev = crtc->dev;
-	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct drm_framebuffer *old_fb = crtc->primary->fb;
-	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-	enum pipe pipe = intel_crtc->pipe;
-	struct intel_unpin_work *work;
-	struct intel_engine_cs *ring;
-	int ret;
-
-	//trigger software GT busyness calculation
-	gen8_flip_interrupt(dev);
 
 	/*
 	 * drm_mode_page_flip_ioctl() should already catch this, but double
@@ -9680,6 +9668,27 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
 	     fb->pitches[0] != crtc->primary->fb->pitches[0]))
 		return -EINVAL;
 
+	return 0;
+}
+
+static int intel_crtc_commit_page_flip(struct drm_crtc *crtc,
+				       struct drm_framebuffer *fb,
+				       struct drm_pending_vblank_event *event,
+				       uint32_t page_flip_flags)
+{
+	struct drm_device *dev = crtc->dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct drm_framebuffer *old_fb = crtc->primary->fb;
+	struct drm_i915_gem_object *obj = intel_fb_obj(fb);
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	enum pipe pipe = intel_crtc->pipe;
+	struct intel_unpin_work *work;
+	struct intel_engine_cs *ring;
+	int ret;
+
+	/* trigger software GT busyness calculation */
+	gen8_flip_interrupt(dev);
+
 	if (i915_terminally_wedged(&dev_priv->gpu_error))
 		goto out_hang;
 
@@ -9823,6 +9832,20 @@ out_hang:
 	return ret;
 }
 
+static int intel_crtc_page_flip(struct drm_crtc *crtc,
+				struct drm_framebuffer *fb,
+				struct drm_pending_vblank_event *event,
+				uint32_t page_flip_flags)
+{
+	int ret;
+
+	ret = intel_crtc_check_page_flip(crtc, fb);
+	if (ret)
+		return ret;
+
+	return intel_crtc_commit_page_flip(crtc, fb, event, page_flip_flags);
+}
+
 static struct drm_crtc_helper_funcs intel_helper_funcs = {
 	.mode_set_base_atomic = intel_pipe_set_base_atomic,
 	.load_lut = intel_crtc_load_lut,
-- 
1.9.3