drm/i915: rip out the HWSTAM missed irq workaround

With the new ducttape of much finer quality, this seems to be no
longer necessary.

Tested on my ivb and snb machine with the usual suspects of testcases.

(v2 by keithp -- limited change to IVB only for now)

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 5d433fc11ace138748907b17cbb3a9932732b46b..5bd4361ea84dd2e5e4a0e39a6af249ccd7786573 100644 (file)
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -1751,7 +1751,8 @@ static void ironlake_irq_preinstall(struct drm_device *dev)
                INIT_WORK(&dev_priv->rps_work, gen6_pm_rps_work);
 
        I915_WRITE(HWSTAM, 0xeffe);
-       if (IS_GEN6(dev) || IS_GEN7(dev)) {
+
+       if (IS_GEN6(dev)) {
                /* Workaround stalls observed on Sandy Bridge GPUs by
                 * making the blitter command streamer generate a
                 * write to the Hardware Status Page for