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| author | Takashi Iwai <tiwai@suse.de> | 2009-05-29 11:46:10 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2009-05-29 11:46:10 +0200 |
| commit | e93721a70263afefbac781f575bfe851c6f95d84 (patch) | |
| tree | ab359f12a0688802aa99339bae82c51763dae9f6 /drivers/gpu/drm/i915/intel_i2c.c | |
| parent | ae1ec5e1e97f67d41e641a73380129e5905e41cc (diff) | |
| parent | c87d9732004b3f8fd82d729f12ccfb96c0df279e (diff) | |
Merge branch 'fix/pcm-jiffies-check' into topic/pcm-jiffies-check
Diffstat (limited to 'drivers/gpu/drm/i915/intel_i2c.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_i2c.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c index 5ee9d4c25753..f7061f68d050 100644 --- a/drivers/gpu/drm/i915/intel_i2c.c +++ b/drivers/gpu/drm/i915/intel_i2c.c @@ -34,6 +34,21 @@ #include "i915_drm.h" #include "i915_drv.h" +void intel_i2c_quirk_set(struct drm_device *dev, bool enable) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + /* When using bit bashing for I2C, this bit needs to be set to 1 */ + if (!IS_IGD(dev)) + return; + if (enable) + I915_WRITE(CG_2D_DIS, + I915_READ(CG_2D_DIS) | DPCUNIT_CLOCK_GATE_DISABLE); + else + I915_WRITE(CG_2D_DIS, + I915_READ(CG_2D_DIS) & (~DPCUNIT_CLOCK_GATE_DISABLE)); +} + /* * Intel GPIO access functions */ @@ -153,8 +168,10 @@ struct intel_i2c_chan *intel_i2c_create(struct drm_device *dev, const u32 reg, goto out_free; /* JJJ: raise SCL and SDA? */ + intel_i2c_quirk_set(dev, true); set_data(chan, 1); set_clock(chan, 1); + intel_i2c_quirk_set(dev, false); udelay(20); return chan; |