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drm/i915: Disable LVDS i2c probing when using GPIO bit banging

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This check only appears to succeed when using GMBUS, so we need to skip
it if we have fallen back to using GPIO bit banging.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2010-09-28 16:41:32 +01:00
parent e0e41598b4
commit b8232e9063
2 changed files with 7 additions and 0 deletions
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4
drivers/gpu/drm/i915/i915_drv.h
View File

@ -1108,6 +1108,10 @@ extern int intel_setup_gmbus(struct drm_device *dev);
extern void intel_teardown_gmbus(struct drm_device *dev);
extern void intel_gmbus_set_speed(struct i2c_adapter *adapter, int speed);
extern void intel_gmbus_force_bit(struct i2c_adapter *adapter, bool force_bit);
extern inline bool intel_gmbus_is_forced_bit(struct i2c_adapter *adapter)
{
return container_of(adapter, struct intel_gmbus, adapter)->force_bit;
}
extern void intel_i2c_reset(struct drm_device *dev);
/* intel_opregion.c */

3
drivers/gpu/drm/i915/intel_lvds.c
View File

@ -827,6 +827,9 @@ static bool intel_lvds_ddc_probe(struct drm_device *dev, u8 pin)
},
};
struct i2c_adapter *i2c = &dev_priv->gmbus[pin].adapter;
/* XXX this only appears to work when using GMBUS */
if (intel_gmbus_is_forced_bit(i2c))
return true;
return i2c_transfer(i2c, msgs, 1) == 1;
}