On Thu, Nov 01, 2012 at 07:37:36AM -0700, Jesse Barnes wrote:
> > v3: Paulo Zanoni pointed out that this workaround is also required on
> > the LPT PCH. And Arthur Ranyan confirmed that this workaround is
> > requierd for all ports on the pch, not just DP: The important part
> > is that the bit is set whenever the pch transcoder is enabled, and
> > that it is _not_ set while the fdi link is trained. It is also
> > important that the pch transcoder is fully disabled, i.e. we have to
> > wait for bit 30 to clear before clearing the w/a bit.
See above: "Paulo Zanoni pointed out that this workaround is also required
on the LPT PCH".
> > + if (!HAS_PCH_IBX(dev)) {
> > + /* Workaround: Set the timing override bit before enabling the
> > + * pch transcoder. */
> > + reg = TRANS_CHICKEN2(pipe);
> > + val = I915_READ(reg);
> > + val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
> > + I915_WRITE(reg, val);
> > + }
>
> I'd like this better if it were HAS_PCH_CPT; we use that as a synonym
> for PPT elsehwere, and it shouldn't apply to LPT right? I see LPT has
> the bit, but I don't know if it's needed (the changelong and summary
> are misleading if so).
Paulo's vga patch bomb will split this up, so we can use HAS_PCH_CPT
instead of !IBX. But since I've written this patch against dinq without
paulo's patches, hence HAS_CPT would be wrong. So:
What colour would please you most, Sir?
Cheers, Daniel
--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
