[Intel-gfx] [PATCH 2/4] drm/i915: Push an fbc disable across suspend

[Adam Jackson]

Restore it on the way back up if we disabled it on the way down.

Signed-off-by: Adam Jackson <ajax at redhat.com>
---
 drivers/gpu/drm/i915/i915_drv.c     |   13 +++++++++++++
 drivers/gpu/drm/i915/i915_drv.h     |    1 +
 drivers/gpu/drm/i915/i915_suspend.c |    2 --
 3 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 01e91ea..412bade 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -233,6 +233,9 @@ static int i915_drm_freeze(struct drm_device *dev)
 		drm_irq_uninstall(dev);
 	}
 
+	dev_priv->fbc_disabled_for_suspend = intel_fbc_enabled(dev);
+	intel_disable_fbc(dev);
+
 	i915_save_state(dev);
 
 	intel_opregion_free(dev, 1);
@@ -276,6 +279,16 @@ static int i915_drm_thaw(struct drm_device *dev)
 
 	i915_restore_state(dev);
 
+	if (dev_priv->fbc_disabled_for_suspend) {
+		struct drm_crtc *crtc;
+
+		/* XXX might not be the plane we compressed at suspend; meh */
+		list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
+			intel_enable_fbc(crtc, 500);
+
+		dev_priv->fbc_disabled_for_suspend = false;
+	}
+
 	intel_opregion_init(dev, 1);
 
 	/* KMS EnterVT equivalent */
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 3a19cb4..e9e8c4a 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -341,6 +341,7 @@ typedef struct drm_i915_private {
 
 	/* Register state */
 	bool modeset_on_lid;
+	bool fbc_disabled_for_suspend;
 	u8 saveLBB;
 	u32 saveDSPACNTR;
 	u32 saveDSPBCNTR;
diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c
index 60a5800..81cdfb4 100644
--- a/drivers/gpu/drm/i915/i915_suspend.c
+++ b/drivers/gpu/drm/i915/i915_suspend.c
@@ -707,10 +707,8 @@ void i915_restore_display(struct drm_device *dev)
 	/* only restore FBC info on the platform that supports FBC*/
 	if (I915_HAS_FBC(dev)) {
 		if (IS_GM45(dev)) {
-			g4x_disable_fbc(dev);
 			I915_WRITE(DPFC_CB_BASE, dev_priv->saveDPFC_CB_BASE);
 		} else {
-			i8xx_disable_fbc(dev);
 			I915_WRITE(FBC_CFB_BASE, dev_priv->saveFBC_CFB_BASE);
 			I915_WRITE(FBC_LL_BASE, dev_priv->saveFBC_LL_BASE);
 			I915_WRITE(FBC_CONTROL2, dev_priv->saveFBC_CONTROL2);
-- 
1.7.0.1