Needed to make sure we can enter/exit RC6 properly.
v2: move to modeset_init since reset in init_clock_gating is too early
Cc: James Kukunas <james.t.kuku...@intel.com>
Cc: Arjan van de Ven <ar...@linux.intel.com>
Signed-off-by: Jesse Barnes <jbar...@virtuousgeek.org>
---
drivers/gpu/drm/i915/i915_dma.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 80ed751..9330c56 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1321,6 +1321,13 @@ static int i915_load_modeset_init(struct drm_device *dev)
/* We're off and running w/KMS */
dev_priv->mm.suspended = 0;
+ /*
+ * SNB needs to reset after disabling CSunit clock gating or RC6 may
+ * break.
+ */
+ if (IS_GEN6(dev))
+ i915_reset(dev);
+
return 0;
cleanup_irq:
--
1.7.9.5
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