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| author | Eric Anholt <eric@anholt.net> | 2009-12-01 11:56:30 -0800 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2009-12-01 11:56:30 -0800 |
| commit | f0217c42c9ab3d772e543f635ce628b9478f70b6 (patch) | |
| tree | 01dfcd607f90f250fb27cb303747b3d770879742 /drivers/gpu/drm/i915/i915_reg.h | |
| parent | d09c23de9f967a7b7dcee0ffc57222ddbd821aba (diff) | |
| download | blackbird-op-linux-f0217c42c9ab3d772e543f635ce628b9478f70b6.tar.gz blackbird-op-linux-f0217c42c9ab3d772e543f635ce628b9478f70b6.zip | |
drm/i915: Fix DDC on some systems by clearing BIOS GMBUS setup.
This is a sync of a fix I made in the old UMS code. If the BIOS uses
the GMBUS and doesn't clear that setup, then our bit-banging I2C can
fail, leading to monitors not being detected.
Signed-off-by: Eric Anholt <eric@anholt.net>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_reg.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 6b596020d362..c4a273513b2f 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -414,6 +414,13 @@ # define GPIO_DATA_VAL_IN (1 << 12) # define GPIO_DATA_PULLUP_DISABLE (1 << 13) +#define GMBUS0 0x5100 +#define GMBUS1 0x5104 +#define GMBUS2 0x5108 +#define GMBUS3 0x510c +#define GMBUS4 0x5110 +#define GMBUS5 0x5120 + /* * Clock control & power management */ @@ -2166,6 +2173,13 @@ #define PCH_GPIOE 0xc5020 #define PCH_GPIOF 0xc5024 +#define PCH_GMBUS0 0xc5100 +#define PCH_GMBUS1 0xc5104 +#define PCH_GMBUS2 0xc5108 +#define PCH_GMBUS3 0xc510c +#define PCH_GMBUS4 0xc5110 +#define PCH_GMBUS5 0xc5120 + #define PCH_DPLL_A 0xc6014 #define PCH_DPLL_B 0xc6018 |
