On Wed, 2017-05-31 at 21:08 +0000, Pandiyan, Dhinakaran wrote:
> On Tue, 2017-05-30 at 15:42 -0700, Rodrigo Vivi wrote:
> > As for BXT, PP_DIVISOR was removed from CNP PCH and power
> > cycle delay has been moved to PP_CONTROL.
> >
> > Cc: Jani Nikula <jani.nik...@intel.com>
> > Signed-off-by: Rodrigo Vivi <rodrigo.v...@intel.com>
> > ---
> > drivers/gpu/drm/i915/intel_dp.c | 10 +++++-----
> > 1 file changed, 5 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_dp.c
> > b/drivers/gpu/drm/i915/intel_dp.c
> > index 58dca87..1a27c72 100644
> > --- a/drivers/gpu/drm/i915/intel_dp.c
> > +++ b/drivers/gpu/drm/i915/intel_dp.c
> > @@ -798,7 +798,7 @@ static void intel_pps_get_registers(struct
> > drm_i915_private *dev_priv,
> > regs->pp_stat = PP_STATUS(pps_idx);
>
> We get the PPS index for BXT from bxt_power_sequencer_idx(), but I don't
> see that in this patch for CNP PCH. Does that mean CNP has just one
> power sequencer?
exactly, only one power sequencer for CNP.
>
>
> > regs->pp_on = PP_ON_DELAYS(pps_idx);
> > regs->pp_off = PP_OFF_DELAYS(pps_idx);
> > - if (!IS_GEN9_LP(dev_priv))
> > + if (!IS_GEN9_LP(dev_priv) && !HAS_PCH_CNP(dev_priv))
> > regs->pp_div = PP_DIVISOR(pps_idx);
> > }
> >
> > @@ -5099,7 +5099,7 @@ static void
> > intel_dp_init_panel_power_timestamps(struct intel_dp *intel_dp)
> >
> > pp_on = I915_READ(regs.pp_on);
> > pp_off = I915_READ(regs.pp_off);
> > - if (!IS_GEN9_LP(dev_priv)) {
> > + if (!IS_GEN9_LP(dev_priv) && !HAS_PCH_CNP(dev_priv)) {
> > I915_WRITE(regs.pp_ctrl, pp_ctl);
> > pp_div = I915_READ(regs.pp_div);
> > }
> > @@ -5117,7 +5117,7 @@ static void
> > intel_dp_init_panel_power_timestamps(struct intel_dp *intel_dp)
> > seq->t10 = (pp_off & PANEL_POWER_DOWN_DELAY_MASK) >>
> > PANEL_POWER_DOWN_DELAY_SHIFT;
> >
> > - if (IS_GEN9_LP(dev_priv)) {
> > + if (IS_GEN9_LP(dev_priv) || HAS_PCH_CNP(dev_priv)) {
> > u16 tmp = (pp_ctl & BXT_POWER_CYCLE_DELAY_MASK) >>
> > BXT_POWER_CYCLE_DELAY_SHIFT;
> > if (tmp > 0)
> > @@ -5274,7 +5274,7 @@ static void
> > intel_dp_init_panel_power_timestamps(struct intel_dp *intel_dp)
> > (seq->t10 << PANEL_POWER_DOWN_DELAY_SHIFT);
> > /* Compute the divisor for the pp clock, simply match the Bspec
> > * formula. */
> > - if (IS_GEN9_LP(dev_priv)) {
> > + if (IS_GEN9_LP(dev_priv) || HAS_PCH_CNP(dev_priv)) {
> > pp_div = I915_READ(regs.pp_ctrl);
> > pp_div &= ~BXT_POWER_CYCLE_DELAY_MASK;
> > pp_div |= (DIV_ROUND_UP((seq->t11_t12 + 1), 1000)
>
>
> I am not seeing the I915_WRITE for pp_div.
good catch!
so far we have reusing what BIOS had left there...
Sending a new version...
>
>
> > @@ -5308,7 +5308,7 @@ static void
> > intel_dp_init_panel_power_timestamps(struct intel_dp *intel_dp)
> > DRM_DEBUG_KMS("panel power sequencer register settings: PP_ON %#x,
> > PP_OFF %#x, PP_DIV %#x\n",
> > I915_READ(regs.pp_on),
> > I915_READ(regs.pp_off),
> > - IS_GEN9_LP(dev_priv) ?
> > + (IS_GEN9_LP(dev_priv) || HAS_PCH_CNP(dev_priv)) ?
> > (I915_READ(regs.pp_ctrl) & BXT_POWER_CYCLE_DELAY_MASK) :
> > I915_READ(regs.pp_div));
> > }
>
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