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| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2015-09-11 21:14:29 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-09-14 15:24:18 +0200 |
| commit | d7884d69a524b92d9770bcdc03df3c5a6120c2d0 (patch) | |
| tree | c4f8d9c8d2bc0551fd1200b0225751df9989da41 /drivers/gpu/drm/i915/i915_gem_stolen.c | |
| parent | 374887bae861be2e691381f704b3d6068a54457c (diff) | |
| download | lwn-d7884d69a524b92d9770bcdc03df3c5a6120c2d0.tar.gz lwn-d7884d69a524b92d9770bcdc03df3c5a6120c2d0.zip | |
drm/i915: Set stolen reserved to 0 for pre-g4x platforms
This stolen reserved stuff was introduced on g4x, so no need to waste
stolen on older platforms. Unfortunately configdb is no more so I can't
look up the right way to detect this stuff. I do have one hint as to
where the register might be on ctg, but I don't have a ctg to test it,
and on the elk I have here it doesn't contain sensible looking data.
For ilk grits suggegsts it might be in the same place as on snb (the
original PCI reg, not the mirror) but I can't be entirely sure about it
The register shows a round zero on my ilk.
So when there's no really good data for any of these platforms leave the
current "assume 1MiB" approach in place.
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_stolen.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_stolen.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c index f361c4a56995..bf26ecc3781b 100644 --- a/drivers/gpu/drm/i915/i915_gem_stolen.c +++ b/drivers/gpu/drm/i915/i915_gem_stolen.c @@ -281,7 +281,7 @@ static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv, int i915_gem_init_stolen(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; - unsigned long reserved_total, reserved_base, reserved_size; + unsigned long reserved_total, reserved_base = 0, reserved_size; unsigned long stolen_top; mutex_init(&dev_priv->mm.stolen_lock); @@ -306,6 +306,9 @@ int i915_gem_init_stolen(struct drm_device *dev) case 2: case 3: case 4: + if (!IS_G4X(dev)) + break; + /* fall through */ case 5: /* Assume the gen6 maximum for the older platforms. */ reserved_size = 1024 * 1024; |