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drm/i915: Fix page table entries for Bay Trail. 

On Bay Trail, bit 1 means "writeable by the GPU."  Failing to set that
means basically anything using the GPU will cause hangs.

v2: Drop accidental inline keyword on byt_pte_encode.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Tested-by: Daniel Leung <daniel.leung@linux.intel.com> [v1]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Kenneth Graunke 2013-04-22 00:53:50 -07:00 committed by Daniel Vetter
parent 2d04befb94
commit 93c34e70eb
1 changed files with 31 additions and 2 deletions
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33
drivers/gpu/drm/i915/i915_gem_gtt.c
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@ -73,6 +73,27 @@ static gen6_gtt_pte_t gen6_pte_encode(struct drm_device *dev,
return pte;
}
#define BYT_PTE_WRITEABLE (1 << 1)
#define BYT_PTE_SNOOPED_BY_CPU_CACHES (1 << 2)
static gen6_gtt_pte_t byt_pte_encode(struct drm_device *dev,
dma_addr_t addr,
enum i915_cache_level level)
{
gen6_gtt_pte_t pte = GEN6_PTE_VALID;
pte |= GEN6_PTE_ADDR_ENCODE(addr);
/* Mark the page as writeable. Other platforms don't have a
* setting for read-only/writable, so this matches that behavior.
*/
pte |= BYT_PTE_WRITEABLE;
if (level != I915_CACHE_NONE)
pte |= BYT_PTE_SNOOPED_BY_CPU_CACHES;
return pte;
}
static int gen6_ppgtt_enable(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
@ -234,7 +255,11 @@ static int gen6_ppgtt_init(struct i915_hw_ppgtt *ppgtt)
first_pd_entry_in_global_pt =
gtt_total_entries(dev_priv->gtt) - I915_PPGTT_PD_ENTRIES;
ppgtt->pte_encode = gen6_pte_encode;
if (IS_VALLEYVIEW(dev)) {
ppgtt->pte_encode = byt_pte_encode;
} else {
ppgtt->pte_encode = gen6_pte_encode;
}
ppgtt->num_pd_entries = I915_PPGTT_PD_ENTRIES;
ppgtt->enable = gen6_ppgtt_enable;
ppgtt->clear_range = gen6_ppgtt_clear_range;
@ -824,7 +849,11 @@ int i915_gem_gtt_init(struct drm_device *dev)
} else {
dev_priv->gtt.gtt_probe = gen6_gmch_probe;
dev_priv->gtt.gtt_remove = gen6_gmch_remove;
dev_priv->gtt.pte_encode = gen6_pte_encode;
if (IS_VALLEYVIEW(dev)) {
dev_priv->gtt.pte_encode = byt_pte_encode;
} else {
dev_priv->gtt.pte_encode = gen6_pte_encode;
}
}
ret = dev_priv->gtt.gtt_probe(dev, &dev_priv->gtt.total,