diff options
| author | Joel Becker <jlbec@evilplan.org> | 2011-03-28 09:44:26 -0700 |
|---|---|---|
| committer | Joel Becker <jlbec@evilplan.org> | 2011-03-28 09:44:26 -0700 |
| commit | 99bdc3880c611c7f2061fbd5372ef81b40217e26 (patch) | |
| tree | ef68a53e28e9ee53ce9db3642bab5fa5b3d44866 /drivers/gpu/drm/i915/i915_dma.c | |
| parent | ed59992e8d91b70053c53d846a76f7e1ac000454 (diff) | |
| parent | b4e1b7e88b2c87c358c2a88bec0c76d25accc604 (diff) | |
Merge branch 'mlog_replace_for_39' of git://repo.or.cz/taoma-kernel into ocfs2-merge-window-fix
Diffstat (limited to 'drivers/gpu/drm/i915/i915_dma.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_dma.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index 17bd766f2081..e33d9be7df3b 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1895,6 +1895,17 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags) if (IS_GEN2(dev)) dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(30)); + /* 965GM sometimes incorrectly writes to hardware status page (HWS) + * using 32bit addressing, overwriting memory if HWS is located + * above 4GB. + * + * The documentation also mentions an issue with undefined + * behaviour if any general state is accessed within a page above 4GB, + * which also needs to be handled carefully. + */ + if (IS_BROADWATER(dev) || IS_CRESTLINE(dev)) + dma_set_coherent_mask(&dev->pdev->dev, DMA_BIT_MASK(32)); + mmio_bar = IS_GEN2(dev) ? 1 : 0; dev_priv->regs = pci_iomap(dev->pdev, mmio_bar, 0); if (!dev_priv->regs) { |