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Revert "drm/i915: reenable gmbus on gen3+ again"

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This reverts commit c3dfefa0a6.

gmbus in 3.4 has simply too many known issues:
- gmbus is too noisy, we need to rework the logging:
  https://bugs.freedesktop.org/show_bug.cgi?id=48248
- zero-length writes cause an OOPS, and they are
  userspace-triggerable:
  https://lkml.org/lkml/2012/3/30/176
- same for zero-length reads:
  https://bugs.freedesktop.org/show_bug.cgi?id=48269

We can try again for 3.5.

Acked-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2012-04-09 21:10:38 +02:00
parent c486793647
commit 6a562e3dae
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/intel_i2c.c
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@ -390,7 +390,7 @@ int intel_setup_gmbus(struct drm_device *dev)
bus->has_gpio = intel_gpio_setup(bus, i);
/* XXX force bit banging until GMBUS is fully debugged */
if (bus->has_gpio && IS_GEN2(dev))
if (bus->has_gpio)
bus->force_bit = true;
}