drm/i915: extract crtc_is_valid() on the FBC code

We're going to kill intel_fbc_find_crtc(), that's why a big part of
the logic moved from intel_fbc_find_crtc() to crtc_is_valid().

v2:
  - Rebase due to pipe_a_only change.
  - Split the multiline conditional (Chris).

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1446664257-32012-5-git-send-email-paulo.r.zanoni@intel.com
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c
index 4a21435..b975be0 100644 (file)
--- a/drivers/gpu/drm/i915/intel_fbc.c
+++ b/drivers/gpu/drm/i915/intel_fbc.c
@@ -487,6 +487,22 @@ static void set_no_fbc_reason(struct drm_i915_private *dev_priv,
        DRM_DEBUG_KMS("Disabling FBC: %s\n", reason);
 }
 
+static bool crtc_is_valid(struct intel_crtc *crtc)
+{
+       struct drm_i915_private *dev_priv = crtc->base.dev->dev_private;
+
+       if (fbc_on_pipe_a_only(dev_priv) && crtc->pipe != PIPE_A)
+               return false;
+
+       if (!intel_crtc_active(&crtc->base))
+               return false;
+
+       if (!to_intel_plane_state(crtc->base.primary->state)->visible)
+               return false;
+
+       return true;
+}
+
 static struct drm_crtc *intel_fbc_find_crtc(struct drm_i915_private *dev_priv)
 {
        struct drm_crtc *crtc = NULL, *tmp_crtc;
@@ -495,12 +511,8 @@ static struct drm_crtc *intel_fbc_find_crtc(struct drm_i915_private *dev_priv)
        for_each_pipe(dev_priv, pipe) {
                tmp_crtc = dev_priv->pipe_to_crtc_mapping[pipe];
 
-               if (intel_crtc_active(tmp_crtc) &&
-                   to_intel_plane_state(tmp_crtc->primary->state)->visible)
+               if (crtc_is_valid(to_intel_crtc(tmp_crtc)))
                        crtc = tmp_crtc;
-
-               if (fbc_on_pipe_a_only(dev_priv))
-                       break;
        }
 
        if (!crtc)