From d11b6a8053361f44bac83573b64408687944ebb1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Date: Wed, 4 Sep 2013 18:25:25 +0300
Subject: drm/i915: Make intel_crtc_active() available outside intel_pm.c
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Move intel_crtc_active() to intel_display.c and make it available
elsewhere as well.

intel_edp_psr_match_conditions() already has one open coded copy,
so replace that one with a call to intel_crtc_active().

v2: Copy paste a big comment from danvet's mail explaining
    when we can ditch the extra checks

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 20ddf6650458d08d42c3c3f8240a0d00a7e9ee97)
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 17 +++++++++++++++++
 drivers/gpu/drm/i915/intel_dp.c      |  3 +--
 drivers/gpu/drm/i915/intel_drv.h     |  2 ++
 drivers/gpu/drm/i915/intel_pm.c      | 11 -----------
 4 files changed, 20 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index b3d136685ba8..aa3b9c6f7a98 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -733,6 +733,23 @@ vlv_find_best_dpll(const intel_limit_t *limit, struct drm_crtc *crtc,
 	return true;
 }
 
+bool intel_crtc_active(struct drm_crtc *crtc)
+{
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+
+	/* Be paranoid as we can arrive here with only partial
+	 * state retrieved from the hardware during setup.
+	 *
+	 * We can ditch the adjusted_mode.clock check as soon
+	 * as Haswell has gained clock readout/fastboot support.
+	 *
+	 * We can ditch the crtc->fb check as soon as we can
+	 * properly reconstruct framebuffers.
+	 */
+	return intel_crtc->active && crtc->fb &&
+		intel_crtc->config.adjusted_mode.clock;
+}
+
 enum transcoder intel_pipe_to_cpu_transcoder(struct drm_i915_private *dev_priv,
 					     enum pipe pipe)
 {
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index a89a6c6f9b23..cbbd36913109 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1639,8 +1639,7 @@ static bool intel_edp_psr_match_conditions(struct intel_dp *intel_dp)
 	}
 
 	intel_crtc = to_intel_crtc(crtc);
-	if (!intel_crtc->active || !crtc->fb ||
-	    !intel_crtc->config.adjusted_mode.clock) {
+	if (!intel_crtc_active(crtc)) {
 		DRM_DEBUG_KMS("crtc not active for PSR\n");
 		dev_priv->no_psr_reason = PSR_CRTC_NOT_ACTIVE;
 		return false;
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 2597027001db..cd7ed03094ee 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -810,4 +810,6 @@ extern void ironlake_check_encoder_dotclock(const struct intel_crtc_config *pipe
 					    int dotclock);
 extern void i915_disable_vga_mem(struct drm_device *dev);
 
+extern bool intel_crtc_active(struct drm_crtc *crtc);
+
 #endif /* __INTEL_DRV_H__ */
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index fb53207af99b..3ecdfef3b619 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -43,17 +43,6 @@
  * i915.i915_enable_fbc parameter
  */
 
-static bool intel_crtc_active(struct drm_crtc *crtc)
-{
-	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
-
-	/* Be paranoid as we can arrive here with only partial
-	 * state retrieved from the hardware during setup.
-	 */
-	return intel_crtc->active && crtc->fb &&
-		intel_crtc->config.adjusted_mode.clock;
-}
-
 static void i8xx_disable_fbc(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
-- 
1.8.5.rc3