diff options
| author | Paul Mundt <lethal@linux-sh.org> | 2011-03-17 16:44:08 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2011-03-17 16:44:08 +0900 |
| commit | 1d2a1959fe534279cf37aba20b08c24c20840e52 (patch) | |
| tree | 67c0b9aa7fe22a44bf0b4af88947799203eb8f67 /drivers/gpu/drm/i915/i915_dma.c | |
| parent | 5a79ce76e9bb8f4b2cd8106ee36d15ee05013bcf (diff) | |
| parent | 054cfaacf88865bff1dd58d305443d5d6c068a08 (diff) | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into sh-latest
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 17bd766f208..e33d9be7df3 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) { |