| What | Removed | Added |
|---|---|---|
| Attachment #75196 is obsolete | 1 |
Comment # 23
on bug 59982
from Lucas Kannebley Tavares
Created attachment 75313 [details] [review] Fixes on the Workaround Hi Jerome, this is the patch I actually used. I had already done what you said and also removed a couple of left shifts you had added upon reading the low words. The results are still the same, though. Right now I'm tracing it by going through the code between the call to DAC1OutputControl on radeon_atom_encoder_dpms_avivo and the call to DPEncoderService on either radeon_dp_encoder_service or radeon_dp_link_train and instrumenting it, not sure which one yet, but I'm guessing the first. This is to make sure the driver is not doing anything else that could be going wrong in between calls, because after that DAC1OutputControl call, everything is still fine, it's somewhere in between those calls that the adapter goes to hell. Another thing that I'd like to ask is, you suggested me to "make sure the pipes are off". I've looked through the registers looking for something to get DAC state or disable them, and have not found it. As far as I can tell, your patch would already make sure we're not doing improper access, but are there any more interesting registers I should be looking into as well? Thanks
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