Commit c630119f authored by Daniel Vetter's avatar Daniel Vetter

drm/i915: don't save/restore HWS_PGA reg for kms

We already do that as part of the ringbuffer re-setup at resume time.
Furthermore the register offset has moved on gen6+ around quite a bit,
and on ilk/gm45 we also need to restore the HWS reg for the bsd ring,
not just the render ring.

So again in kms mode this is only confusing a best, hence don't
bother.

v2: Fixup logic, noticed by Paulo Zanoni.
Reviewed-by: default avatarPaulo Zanoni <paulo.r.zanoni@intel.com>
Tested-by: default avatarPaulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 905c27bb
......@@ -814,6 +814,7 @@ int i915_save_state(struct drm_device *dev)
mutex_lock(&dev->struct_mutex);
/* Hardware status page */
if (!drm_core_check_feature(dev, DRIVER_MODESET))
dev_priv->saveHWS = I915_READ(HWS_PGA);
i915_save_display(dev);
......@@ -867,6 +868,7 @@ int i915_restore_state(struct drm_device *dev)
mutex_lock(&dev->struct_mutex);
/* Hardware status page */
if (!drm_core_check_feature(dev, DRIVER_MODESET))
I915_WRITE(HWS_PGA, dev_priv->saveHWS);
i915_restore_display(dev);
......
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