-static const char * const bxt_ddi_pll_names[] = {
- "PORT PLL A",
- "PORT PLL B",
- "PORT PLL C",
-};
-
-static void bxt_ddi_pll_enable(struct drm_i915_private *dev_priv,
- struct intel_shared_dpll *pll)
-{
- uint32_t temp;
- enum port port = (enum port)pll->id; /* 1:1 port->PLL mapping */
-
- temp = I915_READ(BXT_PORT_PLL_ENABLE(port));
- temp &= ~PORT_PLL_REF_SEL;
- /* Non-SSC reference */
- I915_WRITE(BXT_PORT_PLL_ENABLE(port), temp);
-
- /* Disable 10 bit clock */
- temp = I915_READ(BXT_PORT_PLL_EBB_4(port));
- temp &= ~PORT_PLL_10BIT_CLK_ENABLE;
- I915_WRITE(BXT_PORT_PLL_EBB_4(port), temp);
-
- /* Write P1 & P2 */
- temp = I915_READ(BXT_PORT_PLL_EBB_0(port));
- temp &= ~(PORT_PLL_P1_MASK | PORT_PLL_P2_MASK);
- temp |= pll->config.hw_state.ebb0;
- I915_WRITE(BXT_PORT_PLL_EBB_0(port), temp);
-
- /* Write M2 integer */
- temp = I915_READ(BXT_PORT_PLL(port, 0));
- temp &= ~PORT_PLL_M2_MASK;
- temp |= pll->config.hw_state.pll0;
- I915_WRITE(BXT_PORT_PLL(port, 0), temp);
-
- /* Write N */
- temp = I915_READ(BXT_PORT_PLL(port, 1));
- temp &= ~PORT_PLL_N_MASK;
- temp |= pll->config.hw_state.pll1;
- I915_WRITE(BXT_PORT_PLL(port, 1), temp);
-
- /* Write M2 fraction */
- temp = I915_READ(BXT_PORT_PLL(port, 2));
- temp &= ~PORT_PLL_M2_FRAC_MASK;
- temp |= pll->config.hw_state.pll2;
- I915_WRITE(BXT_PORT_PLL(port, 2), temp);
-
- /* Write M2 fraction enable */
- temp = I915_READ(BXT_PORT_PLL(port, 3));
- temp &= ~PORT_PLL_M2_FRAC_ENABLE;
- temp |= pll->config.hw_state.pll3;
- I915_WRITE(BXT_PORT_PLL(port, 3), temp);
-
- /* Write coeff */
- temp = I915_READ(BXT_PORT_PLL(port, 6));
- temp &= ~PORT_PLL_PROP_COEFF_MASK;
- temp &= ~PORT_PLL_INT_COEFF_MASK;
- temp &= ~PORT_PLL_GAIN_CTL_MASK;
- temp |= pll->config.hw_state.pll6;
- I915_WRITE(BXT_PORT_PLL(port, 6), temp);
-
- /* Write calibration val */
- temp = I915_READ(BXT_PORT_PLL(port, 8));
- temp &= ~PORT_PLL_TARGET_CNT_MASK;
- temp |= pll->config.hw_state.pll8;
- I915_WRITE(BXT_PORT_PLL(port, 8), temp);
-
- temp = I915_READ(BXT_PORT_PLL(port, 9));
- temp &= ~PORT_PLL_LOCK_THRESHOLD_MASK;
- temp |= pll->config.hw_state.pll9;
- I915_WRITE(BXT_PORT_PLL(port, 9), temp);
-
- temp = I915_READ(BXT_PORT_PLL(port, 10));
- temp &= ~PORT_PLL_DCO_AMP_OVR_EN_H;
- temp &= ~PORT_PLL_DCO_AMP_MASK;
- temp |= pll->config.hw_state.pll10;
- I915_WRITE(BXT_PORT_PLL(port, 10), temp);
-
- /* Recalibrate with new settings */
- temp = I915_READ(BXT_PORT_PLL_EBB_4(port));
- temp |= PORT_PLL_RECALIBRATE;
- I915_WRITE(BXT_PORT_PLL_EBB_4(port), temp);
- temp &= ~PORT_PLL_10BIT_CLK_ENABLE;
- temp |= pll->config.hw_state.ebb4;
- I915_WRITE(BXT_PORT_PLL_EBB_4(port), temp);
-
- /* Enable PLL */
- temp = I915_READ(BXT_PORT_PLL_ENABLE(port));
- temp |= PORT_PLL_ENABLE;
- I915_WRITE(BXT_PORT_PLL_ENABLE(port), temp);
- POSTING_READ(BXT_PORT_PLL_ENABLE(port));
-
- if (wait_for_atomic_us((I915_READ(BXT_PORT_PLL_ENABLE(port)) &
- PORT_PLL_LOCK), 200))
- DRM_ERROR("PLL %d not locked\n", port);
-
- /*
- * While we write to the group register to program all lanes at once we
- * can read only lane registers and we pick lanes 0/1 for that.
- */
- temp = I915_READ(BXT_PORT_PCS_DW12_LN01(port));
- temp &= ~LANE_STAGGER_MASK;
- temp &= ~LANESTAGGER_STRAP_OVRD;
- temp |= pll->config.hw_state.pcsdw12;
- I915_WRITE(BXT_PORT_PCS_DW12_GRP(port), temp);
-}
-
-static void bxt_ddi_pll_disable(struct drm_i915_private *dev_priv,
- struct intel_shared_dpll *pll)
-{
- enum port port = (enum port)pll->id; /* 1:1 port->PLL mapping */
- uint32_t temp;
-
- temp = I915_READ(BXT_PORT_PLL_ENABLE(port));
- temp &= ~PORT_PLL_ENABLE;
- I915_WRITE(BXT_PORT_PLL_ENABLE(port), temp);
- POSTING_READ(BXT_PORT_PLL_ENABLE(port));
-}
-
-static bool bxt_ddi_pll_get_hw_state(struct drm_i915_private *dev_priv,
- struct intel_shared_dpll *pll,
- struct intel_dpll_hw_state *hw_state)
-{
- enum port port = (enum port)pll->id; /* 1:1 port->PLL mapping */
- uint32_t val;
- bool ret;
-
- if (!intel_display_power_get_if_enabled(dev_priv, POWER_DOMAIN_PLLS))
- return false;
-
- ret = false;
-
- val = I915_READ(BXT_PORT_PLL_ENABLE(port));
- if (!(val & PORT_PLL_ENABLE))
- goto out;
-
- hw_state->ebb0 = I915_READ(BXT_PORT_PLL_EBB_0(port));
- hw_state->ebb0 &= PORT_PLL_P1_MASK | PORT_PLL_P2_MASK;
-
- hw_state->ebb4 = I915_READ(BXT_PORT_PLL_EBB_4(port));
- hw_state->ebb4 &= PORT_PLL_10BIT_CLK_ENABLE;
-
- hw_state->pll0 = I915_READ(BXT_PORT_PLL(port, 0));
- hw_state->pll0 &= PORT_PLL_M2_MASK;
-
- hw_state->pll1 = I915_READ(BXT_PORT_PLL(port, 1));
- hw_state->pll1 &= PORT_PLL_N_MASK;
-
- hw_state->pll2 = I915_READ(BXT_PORT_PLL(port, 2));
- hw_state->pll2 &= PORT_PLL_M2_FRAC_MASK;
-
- hw_state->pll3 = I915_READ(BXT_PORT_PLL(port, 3));
- hw_state->pll3 &= PORT_PLL_M2_FRAC_ENABLE;
-
- hw_state->pll6 = I915_READ(BXT_PORT_PLL(port, 6));
- hw_state->pll6 &= PORT_PLL_PROP_COEFF_MASK |
- PORT_PLL_INT_COEFF_MASK |
- PORT_PLL_GAIN_CTL_MASK;
-
- hw_state->pll8 = I915_READ(BXT_PORT_PLL(port, 8));
- hw_state->pll8 &= PORT_PLL_TARGET_CNT_MASK;
-
- hw_state->pll9 = I915_READ(BXT_PORT_PLL(port, 9));
- hw_state->pll9 &= PORT_PLL_LOCK_THRESHOLD_MASK;
-
- hw_state->pll10 = I915_READ(BXT_PORT_PLL(port, 10));
- hw_state->pll10 &= PORT_PLL_DCO_AMP_OVR_EN_H |
- PORT_PLL_DCO_AMP_MASK;
-
- /*
- * While we write to the group register to program all lanes at once we
- * can read only lane registers. We configure all lanes the same way, so
- * here just read out lanes 0/1 and output a note if lanes 2/3 differ.
- */
- hw_state->pcsdw12 = I915_READ(BXT_PORT_PCS_DW12_LN01(port));
- if (I915_READ(BXT_PORT_PCS_DW12_LN23(port)) != hw_state->pcsdw12)
- DRM_DEBUG_DRIVER("lane stagger config different for lane 01 (%08x) and 23 (%08x)\n",
- hw_state->pcsdw12,
- I915_READ(BXT_PORT_PCS_DW12_LN23(port)));
- hw_state->pcsdw12 &= LANE_STAGGER_MASK | LANESTAGGER_STRAP_OVRD;
-
- ret = true;
-
-out:
- intel_display_power_put(dev_priv, POWER_DOMAIN_PLLS);
-
- return ret;
-}
-
-static void bxt_shared_dplls_init(struct drm_i915_private *dev_priv)
-{
- int i;
-
- dev_priv->num_shared_dpll = 3;
-
- for (i = 0; i < dev_priv->num_shared_dpll; i++) {
- dev_priv->shared_dplls[i].id = i;
- dev_priv->shared_dplls[i].name = bxt_ddi_pll_names[i];
- dev_priv->shared_dplls[i].disable = bxt_ddi_pll_disable;
- dev_priv->shared_dplls[i].enable = bxt_ddi_pll_enable;
- dev_priv->shared_dplls[i].get_hw_state =
- bxt_ddi_pll_get_hw_state;
- }
-}
-
-void intel_ddi_pll_init(struct drm_device *dev)
-{
- struct drm_i915_private *dev_priv = dev->dev_private;
- uint32_t val = I915_READ(LCPLL_CTL);
-
- if (IS_SKYLAKE(dev) || IS_KABYLAKE(dev))
- skl_shared_dplls_init(dev_priv);
- else if (IS_BROXTON(dev))
- bxt_shared_dplls_init(dev_priv);
- else
- hsw_shared_dplls_init(dev_priv);
-
- if (IS_SKYLAKE(dev) || IS_KABYLAKE(dev)) {
- int cdclk_freq;
-
- cdclk_freq = dev_priv->display.get_display_clock_speed(dev);
- dev_priv->skl_boot_cdclk = cdclk_freq;
- if (skl_sanitize_cdclk(dev_priv))
- DRM_DEBUG_KMS("Sanitized cdclk programmed by pre-os\n");
- if (!(I915_READ(LCPLL1_CTL) & LCPLL_PLL_ENABLE))
- DRM_ERROR("LCPLL1 is disabled\n");
- } else if (IS_BROXTON(dev)) {
- broxton_init_cdclk(dev);
- broxton_ddi_phy_init(dev);
- } else {
- /*
- * The LCPLL register should be turned on by the BIOS. For now
- * let's just check its state and print errors in case
- * something is wrong. Don't even try to turn it on.
- */
-
- if (val & LCPLL_CD_SOURCE_FCLK)
- DRM_ERROR("CDCLK source is not LCPLL\n");
-
- if (val & LCPLL_PLL_DISABLE)
- DRM_ERROR("LCPLL is disabled\n");
- }
-}
-