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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2011-03-02 02:20:20 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2011-03-02 02:20:20 +0300 |
| commit | 8d3c3ddfa85837e24fad6fa39318617cbb59e843 (patch) | |
| tree | f699dcaac2a11f0c9506ad111ae39fd5e3617c2d /drivers/gpu/drm/i915/i915_dma.c | |
| parent | e8b2c3c47a53348aebbbeb5322e32937df958793 (diff) | |
| parent | 6927faf30920b8c03dfa007e732642a1f1f20089 (diff) | |
| download | linux-8d3c3ddfa85837e24fad6fa39318617cbb59e843.tar.xz | |
Merge branch 'drm-intel-fixes' into drm-intel-next
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 51150692af2d..8924b4bc7369 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -1900,6 +1900,17 @@ 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) { |