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| author | Robert Richter <robert.richter@amd.com> | 2009-06-10 23:47:10 +0400 |
|---|---|---|
| committer | Robert Richter <robert.richter@amd.com> | 2009-06-10 23:47:10 +0400 |
| commit | 0886751c5d8b19fcee2e65d34ae21c9111e652a9 (patch) | |
| tree | 015e8c2b3d44d46e9e8fccd016340c51bc876d3b /drivers/gpu/drm/i915/intel_i2c.c | |
| parent | 7e4e0bd50e80df2fe5501f48f872448376cdd997 (diff) | |
| parent | 07a2039b8eb0af4ff464efd3dfd95de5c02648c6 (diff) | |
| download | linux-0886751c5d8b19fcee2e65d34ae21c9111e652a9.tar.xz | |
Merge commit 'v2.6.30' into oprofile/master
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; |