[Intel-gfx] [PATCH 14/26] drm/i915: refactor FBC deactivation at init

[Paulo Zanoni]

Make sure we deactivate FBC at intel_fbc_init(), so we can remove the
call from intel_display.c.

v2: Keep/improve the comment (Chris).

Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 3 ---
 drivers/gpu/drm/i915/intel_fbc.c     | 8 ++++++--
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 2392f47..d1a5648 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -14948,9 +14948,6 @@ void intel_modeset_init(struct drm_device *dev)
 	i915_disable_vga(dev);
 	intel_setup_outputs(dev);
 
-	/* Just in case the BIOS is doing something questionable. */
-	intel_fbc_disable(dev_priv);
-
 	drm_modeset_lock_all(dev);
 	intel_modeset_setup_hw_state(dev);
 	drm_modeset_unlock_all(dev);
diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c
index 6f020fc..643871d 100644
--- a/drivers/gpu/drm/i915/intel_fbc.c
+++ b/drivers/gpu/drm/i915/intel_fbc.c
@@ -1112,9 +1112,9 @@ void intel_fbc_init(struct drm_i915_private *dev_priv)
 	enum pipe pipe;
 
 	mutex_init(&dev_priv->fbc.lock);
+	dev_priv->fbc.active = false;
 
 	if (!HAS_FBC(dev_priv)) {
-		dev_priv->fbc.active = false;
 		dev_priv->fbc.no_fbc_reason = "unsupported by this chipset";
 		return;
 	}
@@ -1155,5 +1155,9 @@ void intel_fbc_init(struct drm_i915_private *dev_priv)
 		I915_WRITE(FBC_CONTROL, 500 << FBC_CTL_INTERVAL_SHIFT);
 	}
 
-	dev_priv->fbc.active = dev_priv->fbc.is_active(dev_priv);
+	/* We still don't have any sort of hardware state readout for FBC, so
+	 * disable it in case the BIOS enabled it to make sure software matches
+	 * the hardware state. */
+	if (dev_priv->fbc.is_active(dev_priv))
+		dev_priv->fbc.deactivate(dev_priv);
 }
-- 
2.6.1