[Intel-gfx] [PATCH 2/2]IGD: workaround i2c bus issue in gfx driver side

Eric Anholt eric at anholt.net
Tue Apr 14 01:33:26 CEST 2009

On Tue, 2009-04-07 at 11:02 +0800, Shaohua Li wrote:
> In IGD, DPCUNIT_CLOCK_GATE_DISABLE bit should be set, otherwise i2c
> access will be wrong.

Not sure here, if it might be easier (and more obvious what's going on)
to just wrap the native DDC bus that's implemented with getbits with a
IGD wrapper that sets the gating between start and stop.  i830_sdvo.c
has an example of doing this.

Was the failure with having the gating off reproducible (wondering about
that for both of these patches)

Eric Anholt
eric at anholt.net                         eric.anholt at intel.com

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