[Intel-gfx] [PATCH v3 1/9] drm/i915/tgl: Add initial dkl pll support
Souza, Jose
jose.souza at intel.com
Tue Sep 24 20:20:19 UTC 2019
On Tue, 2019-09-24 at 17:20 +0300, Imre Deak wrote:
> On Mon, Sep 23, 2019 at 12:55:05PM -0700, José Roberto de Souza
> wrote:
> > From: Lucas De Marchi <lucas.demarchi at intel.com>
> >
> > The disable function can be the same as for MG phy since the same
> > registers are used. The others are different as registers changed,
> > also adding a empty dkl_pll_write() to be implemented later.
> >
> > v2:
> > Setting the right HIP_INDEX_REG bits (José)
> >
> > Acked-by: Lucas De Marchi <lucas.demarchi at intel.com>
> > Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
> > Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
> > ---
> > drivers/gpu/drm/i915/display/intel_dpll_mgr.c | 115
> > +++++++++++++++++-
> > 1 file changed, 114 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
> > b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
> > index 84e734d44828..46dde614bfb5 100644
> > --- a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
> > +++ b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
> > @@ -3086,6 +3086,76 @@ static bool mg_pll_get_hw_state(struct
> > drm_i915_private *dev_priv,
> > return ret;
> > }
> >
> > +static bool dkl_pll_get_hw_state(struct drm_i915_private
> > *dev_priv,
> > + struct intel_shared_dpll *pll,
> > + struct intel_dpll_hw_state *hw_state)
> > +{
> > + const enum intel_dpll_id id = pll->info->id;
> > + enum tc_port tc_port = icl_pll_id_to_tc_port(id);
> > + intel_wakeref_t wakeref;
> > + bool ret = false;
> > + u32 val;
> > +
> > + wakeref = intel_display_power_get_if_enabled(dev_priv,
> > + POWER_DOMAIN_DISPL
> > AY_CORE);
> > + if (!wakeref)
> > + return false;
> > +
> > + val = I915_READ(MG_PLL_ENABLE(tc_port));
> > + if (!(val & PLL_ENABLE))
> > + goto out;
> > +
> > + /*
> > + * All registers read here have the same HIP_INDEX_REG even
> > though
> > + * they are on different building blocks
> > + */
> > + I915_WRITE(HIP_INDEX_REG(tc_port), HIP_INDEX_VAL(tc_port,
> > 0x2));
> > +
> > + hw_state->mg_refclkin_ctl =
> > I915_READ(DKL_REFCLKIN_CTL(tc_port));
> > + hw_state->mg_refclkin_ctl &= MG_REFCLKIN_CTL_OD_2_MUX_MASK;
> > +
> > + hw_state->mg_clktop2_hsclkctl =
> > + I915_READ(DKL_CLKTOP2_HSCLKCTL(tc_port));
> > + hw_state->mg_clktop2_hsclkctl &=
> > + MG_CLKTOP2_HSCLKCTL_TLINEDRV_CLKSEL_MASK |
> > + MG_CLKTOP2_HSCLKCTL_CORE_INPUTSEL_MASK |
> > + MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_MASK |
> > + MG_CLKTOP2_HSCLKCTL_DSDIV_RATIO_MASK;
> > +
> > + hw_state->mg_clktop2_coreclkctl1 =
> > + I915_READ(DKL_CLKTOP2_CORECLKCTL1(tc_port));
> > + hw_state->mg_clktop2_coreclkctl1 &=
> > + MG_CLKTOP2_CORECLKCTL1_A_DIVRATIO_MASK;
> > +
> > + hw_state->mg_pll_div0 = I915_READ(DKL_PLL_DIV0(tc_port));
> > + hw_state->mg_pll_div0 &= (DKL_PLL_DIV0_INTEG_COEFF_MASK |
> > + DKL_PLL_DIV0_PROP_COEFF_MASK |
> > + DKL_PLL_DIV0_FBPREDIV_MASK |
> > + DKL_PLL_DIV0_FBDIV_INT_MASK);
> > +
> > + hw_state->mg_pll_div1 = I915_READ(DKL_PLL_DIV1(tc_port));
> > + hw_state->mg_pll_div1 &= (DKL_PLL_DIV1_IREF_TRIM_MASK |
> > + DKL_PLL_DIV1_TDC_TARGET_CNT_MASK);
> > +
> > + hw_state->mg_pll_ssc = I915_READ(DKL_PLL_SSC(tc_port));
> > + hw_state->mg_pll_ssc &= (DKL_PLL_SSC_IREF_NDIV_RATIO_MASK |
> > + DKL_PLL_SSC_STEP_LEN_MASK |
> > + DKL_PLL_SSC_STEP_NUM_MASK |
> > + DKL_PLL_SSC_EN);
> > +
> > + hw_state->mg_pll_bias = I915_READ(DKL_PLL_BIAS(tc_port));
> > + hw_state->mg_pll_bias &= (DKL_PLL_BIAS_FRAC_EN_H |
> > + DKL_PLL_BIAS_FBDIV_FRAC_MASK);
> > +
> > + hw_state->mg_pll_tdc_coldst_bias =
> > + I915_READ(DKL_PLL_TDC_COLDST_BIAS(tc_port));
>
> For the above masking the computed fields is missing.
Done, thanks for catching this
>
> > +
> > + ret = true;
> > +out:
> > + intel_display_power_put(dev_priv, POWER_DOMAIN_DISPLAY_CORE,
> > wakeref);
> > + return ret;
> > +}
> > +
> > static bool icl_pll_get_hw_state(struct drm_i915_private
> > *dev_priv,
> > struct intel_shared_dpll *pll,
> > struct intel_dpll_hw_state *hw_state,
> > @@ -3220,6 +3290,12 @@ static void icl_mg_pll_write(struct
> > drm_i915_private *dev_priv,
> > POSTING_READ(MG_PLL_TDC_COLDST_BIAS(tc_port));
> > }
> >
> > +static void dkl_pll_write(struct drm_i915_private *dev_priv,
> > + struct intel_shared_dpll *pll)
> > +{
> > + /* TODO */
> > +}
> > +
> > static void icl_pll_power_enable(struct drm_i915_private
> > *dev_priv,
> > struct intel_shared_dpll *pll,
> > i915_reg_t enable_reg)
> > @@ -3325,6 +3401,32 @@ static void mg_pll_enable(struct
> > drm_i915_private *dev_priv,
> > /* DVFS post sequence would be here. See the comment above. */
> > }
> >
> > +static void dkl_pll_enable(struct drm_i915_private *dev_priv,
> > + struct intel_shared_dpll *pll)
> > +{
> > + /*
> > + * From spec: MG register instances are being used for TypeC in
> > general.
> > + * The same MG register instances should be programmed for
> > Dekel PLLs
> > + * as well.
>
> Imo BSpec Index/49204 should state it explicitly that the MG and DKL
> enable/disable sequence are the same, but let's assume that.
>
> > + */
> > + i915_reg_t enable_reg =
> > + MG_PLL_ENABLE(icl_pll_id_to_tc_port(pll->info->id));
> > +
> > + icl_pll_power_enable(dev_priv, pll, enable_reg);
> > +
> > + dkl_pll_write(dev_priv, pll);
>
> Nit: reusing mg_pll_enable() instead with a platform check here would
> make things more symmetric.
Done
>
> With the above fix:
> Reviewed-by: Imre Deak <imre.deak at intel.com>
Thanks
>
> > +
> > + /*
> > + * DVFS pre sequence would be here, but in our driver the cdclk
> > code
> > + * paths should already be setting the appropriate voltage,
> > hence we do
> > + * nothing here.
> > + */
> > +
> > + icl_pll_enable(dev_priv, pll, enable_reg);
> > +
> > + /* DVFS post sequence would be here. See the comment above. */
> > +}
> > +
> > static void icl_pll_disable(struct drm_i915_private *dev_priv,
> > struct intel_shared_dpll *pll,
> > i915_reg_t enable_reg)
> > @@ -3467,11 +3569,22 @@ static const struct intel_dpll_mgr
> > ehl_pll_mgr = {
> > .dump_hw_state = icl_dump_hw_state,
> > };
> >
> > +static const struct intel_shared_dpll_funcs dkl_pll_funcs = {
> > + .enable = dkl_pll_enable,
> > + .disable = mg_pll_disable,
> > + .get_hw_state = dkl_pll_get_hw_state,
> > +};
> > +
> > static const struct dpll_info tgl_plls[] = {
> > { "DPLL 0", &combo_pll_funcs, DPLL_ID_ICL_DPLL0, 0 },
> > { "DPLL 1", &combo_pll_funcs, DPLL_ID_ICL_DPLL1, 0 },
> > { "TBT PLL", &tbt_pll_funcs, DPLL_ID_ICL_TBTPLL, 0 },
> > - /* TODO: Add typeC plls */
> > + { "TC PLL 1", &dkl_pll_funcs, DPLL_ID_ICL_MGPLL1, 0 },
> > + { "TC PLL 2", &dkl_pll_funcs, DPLL_ID_ICL_MGPLL2, 0 },
> > + { "TC PLL 3", &dkl_pll_funcs, DPLL_ID_ICL_MGPLL3, 0 },
> > + { "TC PLL 4", &dkl_pll_funcs, DPLL_ID_ICL_MGPLL4, 0 },
> > + { "TC PLL 5", &dkl_pll_funcs, DPLL_ID_TGL_MGPLL5, 0 },
> > + { "TC PLL 6", &dkl_pll_funcs, DPLL_ID_TGL_MGPLL6, 0 },
> > { },
> > };
> >
> > --
> > 2.23.0
> >
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> > Intel-gfx at lists.freedesktop.org
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