diff mbox

[0367/1094] drm/i915: Reset forcewake before suspend

Message ID 1413889294-31328-368-git-send-email-dheerajx.s.jamwal@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Dheeraj Jamwal Oct. 21, 2014, 10:49 a.m. UTC 
From: Chris Wilson <chris@chris-wilson.co.uk>

Now that we regularly defer the forcewake dance to a timer func, it is
likely to fire after we disable the device during suspend. This
generates an oops as we detect inconsistency in the hardware state. So
before suspend, we want to complete the outstanding dance and generally
sanitize the registers before handing back to the BIOS.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 28d85cd367a3f5b4d891ebe9aaaa88a5c73a3a96)

Signed-off-by: Dheeraj Jamwal <dheerajx.s.jamwal@intel.com>
---
 drivers/gpu/drm/i915/i915_drv.c     |    1 +
 drivers/gpu/drm/i915/intel_uncore.c |    4 ++++
 2 files changed, 5 insertions(+)
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 658fe24..5a0d34c 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -467,6 +467,7 @@  static int i915_drm_freeze(struct drm_device *dev)
 	i915_save_state(dev);
 
 	intel_opregion_fini(dev);
+	intel_uncore_fini(dev);
 
 	console_lock();
 	intel_fbdev_set_suspend(dev, FBINFO_STATE_SUSPENDED);
diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index 7861d97..361d1ea 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -805,6 +805,10 @@  void intel_uncore_fini(struct drm_device *dev)
 	/* Paranoia: make sure we have disabled everything before we exit. */
 	intel_uncore_sanitize(dev);
 	intel_uncore_forcewake_reset(dev);
+
+	dev_priv->uncore.forcewake_count = 0;
+	dev_priv->uncore.fw_rendercount = 0;
+	dev_priv->uncore.fw_mediacount = 0;
 }
 
 static const struct register_whitelist {