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drm/i915: disable gmbus on i830
author
Daniel Vetter
<daniel.vetter@ffwll.ch>
Sun, 13 May 2012 12:44:20 +0000
(14:44 +0200)
committer
Daniel Vetter
<daniel.vetter@ffwll.ch>
Sat, 19 May 2012 20:39:55 +0000
(22:39 +0200)
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>
drivers/gpu/drm/i915/intel_i2c.c
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diff --git
a/drivers/gpu/drm/i915/intel_i2c.c
b/drivers/gpu/drm/i915/intel_i2c.c
index
e04255e
..
4a9707d
100644
(file)
--- a/
drivers/gpu/drm/i915/intel_i2c.c
+++ b/
drivers/gpu/drm/i915/intel_i2c.c
@@
-490,6
+490,10
@@
int intel_setup_gmbus(struct drm_device *dev)
/* By default use a conservative clock rate */
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);
}