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drm/i915: disable gmbus on i830

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The hw just returns garbage.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=49838
Reported-and-tested-by: Vladyslav <DFEW.Entwickler@googlemail.com>
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 2012-05-13 14:44:20 +02:00
parent edc912f58e
commit 83ee9e6458
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/i915/intel_i2c.c
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@ -490,6 +490,10 @@ int intel_setup_gmbus(struct drm_device *dev)
/* By default use a conservative clock rate */ /* By default use a conservative clock rate */
bus->reg0 = port | GMBUS_RATE_100KHZ; bus->reg0 = port | GMBUS_RATE_100KHZ;
/* gmbus seems to be broken on i830 */
if (IS_I830(dev))
bus->force_bit = true;
intel_gpio_setup(bus, port); intel_gpio_setup(bus, port);
} }