On Thu, Mar 07, 2013 at 11:31:23AM +0200, Ville Syrjälä wrote:
> On Wed, Mar 06, 2013 at 08:03:08PM -0300, Paulo Zanoni wrote:
> > From: Paulo Zanoni <paulo.r.zan...@intel.com>
> >
> > We already have the same check on intel_enable_ddi. This patch
> > prevents "unclaimed register" messages when the power well is
> > disabled.
> >
> > Signed-off-by: Paulo Zanoni <paulo.r.zan...@intel.com>
> > ---
> > drivers/gpu/drm/i915/intel_ddi.c | 9 ++++++---
> > 1 file changed, 6 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_ddi.c
> > b/drivers/gpu/drm/i915/intel_ddi.c
> > index 56bb7cb..cd2f519 100644
> > --- a/drivers/gpu/drm/i915/intel_ddi.c
> > +++ b/drivers/gpu/drm/i915/intel_ddi.c
> > @@ -1347,9 +1347,12 @@ static void intel_disable_ddi(struct intel_encoder
> > *intel_encoder)
> > ironlake_edp_backlight_off(intel_dp);
> > }
> >
> > - tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
> > - tmp &= ~((AUDIO_OUTPUT_ENABLE_A | AUDIO_ELD_VALID_A) << (pipe * 4));
> > - I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
> > + if (intel_crtc->eld_vld) {
> > + tmp = I915_READ(HSW_AUD_PIN_ELD_CP_VLD);
> > + tmp &= ~((AUDIO_OUTPUT_ENABLE_A | AUDIO_ELD_VALID_A) <<
> > + (pipe * 4));
> > + I915_WRITE(HSW_AUD_PIN_ELD_CP_VLD, tmp);
> > + }
>
> We set eld_vld=false before disabling the crtc in intel_crtc_disable().
> I think you need to rearrange that so that we clear eld_vld only
> after ->crtc_disable has been called.
Just looked a bit through the code here and ->eld_vld is another case of
where the ddi encoder needs to know something which only the connector
really knows currently. Since in our dp/hdmi/sdvo code we just check
<connector>->has_audio in the respective modeset function.
And it's not really the only place where the apparently common ddi
functions are just if ladders gropping around in connector details.
I guess we need to eventually clean this mess up, once things have settled
a bit, since I fear the duplication it icky little bugs this fragmentation
of state keeping might (or probably will) cause.
Ideas welcome ;-)
Cheers, Daniel
--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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