On Fri, 2015-06-12 at 13:32 +0300, Ville Syrjälä wrote:
> On Fri, Jun 12, 2015 at 03:01:08PM +0530, akash.goel@xxxxxxxxx wrote:
> > From: Akash Goel <akash.goel@xxxxxxxxx>
> >
> > Read the efficient frequency (aka RPe) value through the the mailbox
> > command (0x1A) from the pcode, as done on Haswell and Broadwell.
> > The turbo minimum frequency softlimit is not revised as per the
> > efficient frequency value.
> >
> > v2: Replaced the conditional expression operator with 'if' statement (Tom)
> >
> > Issue: VIZ-5143
> > Signed-off-by: Akash Goel <akash.goel@xxxxxxxxx>
> > ---
> > drivers/gpu/drm/i915/intel_pm.c | 8 ++++++--
> > 1 file changed, 6 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> > index d091fec..21b22a7 100644
> > --- a/drivers/gpu/drm/i915/intel_pm.c
> > +++ b/drivers/gpu/drm/i915/intel_pm.c
> > @@ -4314,16 +4314,20 @@ static void gen6_init_rps_frequencies(struct drm_device *dev)
> > dev_priv->rps.max_freq = dev_priv->rps.rp0_freq;
> >
> > dev_priv->rps.efficient_freq = dev_priv->rps.rp1_freq;
> > - if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
> > + if (IS_HASWELL(dev) || IS_BROADWELL(dev) || IS_SKYLAKE(dev)) {
> > ret = sandybridge_pcode_read(dev_priv,
> > HSW_PCODE_DYNAMIC_DUTY_CYCLE_CONTROL,
> > &ddcc_status);
> > - if (0 == ret)
> > + if (0 == ret) {
> > dev_priv->rps.efficient_freq =
> > clamp_t(u8,
> > ((ddcc_status >> 8) & 0xff),
> > dev_priv->rps.min_freq,
> > dev_priv->rps.max_freq);
>
> That's wrong now since min/max_freq were already multiplied by
> GEN9_FREQ_SCALER.
Thanks for catching this issue. Sorry for the lapse.
> > +
> > + if (IS_SKYLAKE(dev))
> > + dev_priv->rps.efficient_freq *= GEN9_FREQ_SCALER;
> > + }
> > }
>
> I would suggest moving all the GEN9_FREQ_SCALER multiplications here.
>
Fine this will be cleaner.
Can I do this movement as a part of this patch only ?
Best regards
Akash
> >
> > dev_priv->rps.idle_freq = dev_priv->rps.min_freq;
> > --
> > 1.9.2
> >
> > _______________________________________________
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> > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> > http://lists.freedesktop.org/mailman/listinfo/intel-gfx
>
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