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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2012-07-05 23:49:40 +0100 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2012-07-20 12:21:37 +0200 |
| commit | 67b1b57182972f3c89c1ff9a58951582cb6bcca7 (patch) | |
| tree | e7b2bffefa0cd2ecc45d19fb26f9fcdaa9e11471 /drivers/gpu/drm/i915 | |
| parent | 0232e927f8b0b37f5c82648f9bc45e55fb245068 (diff) | |
| download | linux-67b1b57182972f3c89c1ff9a58951582cb6bcca7.tar.gz linux-67b1b57182972f3c89c1ff9a58951582cb6bcca7.tar.bz2 linux-67b1b57182972f3c89c1ff9a58951582cb6bcca7.zip | |
drm/i915: Disable the BLT on pre-production SNB hardware
It never quite worked despite the numerous workarounds, yet I still see
people trying to use this hardware and filing bug reports. As we no
longer even try to implement the workarounds, since 6a233c78878
(drm/i915/ringbuffer: kill snb blt workaround), simply disable the ring.
v2: Add a message to inform the user about the limited capabilities of
their pre-production hardware.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 0fdb3d29cbbb..89d62f635ac8 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -3726,6 +3726,22 @@ void i915_gem_init_ppgtt(struct drm_device *dev) } } +static bool +intel_enable_blt(struct drm_device *dev) +{ + if (!HAS_BLT(dev)) + return false; + + /* The blitter was dysfunctional on early prototypes */ + if (IS_GEN6(dev) && dev->pdev->revision < 8) { + DRM_INFO("BLT not supported on this pre-production hardware;" + " graphics performance will be degraded.\n"); + return false; + } + + return true; +} + int i915_gem_init_hw(struct drm_device *dev) { @@ -3749,7 +3765,7 @@ i915_gem_init_hw(struct drm_device *dev) goto cleanup_render_ring; } - if (HAS_BLT(dev)) { + if (intel_enable_blt(dev)) { ret = intel_init_blt_ring_buffer(dev); if (ret) goto cleanup_bsd_ring; |