From c630119f43471a8ece356b01dabf07f944f453b3 Mon Sep 17 00:00:00 2001 From: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Wed, 17 Oct 2012 11:32:57 +0200 Subject: [PATCH] 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: Paulo Zanoni <paulo.r.zanoni@intel.com> Tested-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> --- drivers/gpu/drm/i915/i915_suspend.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c index 6bd06b72b1dc..4f50d8264753 100644 --- a/drivers/gpu/drm/i915/i915_suspend.c +++ b/drivers/gpu/drm/i915/i915_suspend.c @@ -814,7 +814,8 @@ int i915_save_state(struct drm_device *dev) mutex_lock(&dev->struct_mutex); /* Hardware status page */ - dev_priv->saveHWS = I915_READ(HWS_PGA); + if (!drm_core_check_feature(dev, DRIVER_MODESET)) + dev_priv->saveHWS = I915_READ(HWS_PGA); i915_save_display(dev); @@ -867,7 +868,8 @@ int i915_restore_state(struct drm_device *dev) mutex_lock(&dev->struct_mutex); /* Hardware status page */ - I915_WRITE(HWS_PGA, dev_priv->saveHWS); + if (!drm_core_check_feature(dev, DRIVER_MODESET)) + I915_WRITE(HWS_PGA, dev_priv->saveHWS); i915_restore_display(dev); -- GitLab