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  1. Bug #362582
  2. Comment #97

Comment 97 for bug 362582

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In , Gilles Dartiguelongue (gilles-dartiguelongue) wrote :

For the record, I'm still working on this from time to time.
I ported the patch to kernel land quite easily, but still can't figure out what is the problem with register read failures.

Example from a 3.3.1 kernel booted with i915.modeset=1 drm.debug=0x04:

Apr 15 17:52:11 mobilix kernel: [drm:ns2501_init], init ns2501 dvo controller successfully!
Apr 15 17:52:11 mobilix kernel: [drm:ns2501_readb], Unable to read register 0x08 from i915 gmbus dpb:38.
Apr 15 17:52:11 mobilix kernel: [drm:ns2501_readb], Unable to read register 0x08 from i915 gmbus dpb:38.
Apr 15 17:52:11 mobilix kernel: [drm:ns2501_readb], Unable to read register 0x08 from i915 gmbus dpb:38.
Apr 15 17:52:11 mobilix kernel: [drm:ns2501_readb], Unable to read register 0x09 from i915 gmbus dpb:38.
Apr 15 17:52:11 mobilix kernel: [drm:ns2501_readb], Unable to read register 0x08 from i915 gmbus dpb:38.

I would really appreciate someone with drm/intel knowledge helping here.
Will post patches later (code is really not that different that my previous post about this).