On Wed, 2015-10-21 at 12:19 +0300, Ville Syrjälä wrote:
> On Wed, Oct 21, 2015 at 10:28:51AM -0700, Rodrigo Vivi wrote:
> > EBUSY retries are already in place at drm level.
> > We don't need to replicate the job here.
> >
> > Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
> > ---
> > drivers/gpu/drm/i915/intel_dp.c | 20 ++------------------
> > 1 file changed, 2 insertions(+), 18 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_dp.c
> > b/drivers/gpu/drm/i915/intel_dp.c
> > index 09bdd94..d054129 100644
> > --- a/drivers/gpu/drm/i915/intel_dp.c
> > +++ b/drivers/gpu/drm/i915/intel_dp.c
> > @@ -818,24 +818,8 @@ intel_dp_aux_ch(struct intel_dp *intel_dp,
> >
> > intel_aux_display_runtime_get(dev_priv);
> >
> > - /* Try to wait for any previous AUX channel activity */
> > - for (try = 0; try < 3; try++) {
> > - status = I915_READ_NOTRACE(ch_ctl);
> > - if ((status & DP_AUX_CH_CTL_SEND_BUSY) == 0)
> > - break;
> > - msleep(1);
>
> The dp helper doesn't sleep at all between the retries, so dropping
> the
> sleep from here may change the behaviour.
hm indeed... what about
+ msleep(1);
+ ret = -EBUSY
+ goto out;
?
>
> > - }
> > -
> > - if (try == 3) {
> > - static u32 last_status = -1;
> > - const u32 status = I915_READ(ch_ctl);
> > -
> > - if (status != last_status) {
> > - WARN(1, "dp_aux_ch not started status
> > 0x%08x\n",
> > - status);
> > - last_status = status;
> > - }
> > -
> > + status = I915_READ_NOTRACE(ch_ctl);
> > + if ((status & DP_AUX_CH_CTL_SEND_BUSY) != 0) {
> > ret = -EBUSY;
> > goto out;
> > }
> > --
> > 2.4.3
> >
> > _______________________________________________
> > Intel-gfx mailing list
> > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> > http://lists.freedesktop.org/mailman/listinfo/intel-gfx
>
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