The hw just returns garbage. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=49838 Reported-and-tested-by: Vladyslav <DFEW.Entwickler at googlemail.com> Signed-Off-by: Daniel Vetter <daniel.vetter at ffwll.ch> --- drivers/gpu/drm/i915/intel_i2c.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c index e04255e..4a9707d 100644 --- 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); } -- 1.7.10
