From ab3517c1eb01cfd97df8c83435fe43329e0cfae3 Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Tue, 5 Mar 2019 15:52:15 +0200 Subject: [PATCH] drm/i915/dp: use single point of truth for PPS divisor register MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Set pp_div field of struct pps_registers to INVALID_MMIO_REG when the register isn't there, and use i915_mmio_reg_valid() instead of repeating the condition all over the place. Use INVALID_MMIO_REG explicitly for documentation purposes, even if the value is unchanged from 0. Cc: Rodrigo Vivi Cc: Ville Syrjälä Reviewed-by: Lucas De Marchi Reviewed-by: Rodrigo Vivi Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/20190305135215.29862-2-jani.nikula@intel.com --- drivers/gpu/drm/i915/intel_dp.c | 73 ++++++++++++++++++--------------- 1 file changed, 39 insertions(+), 34 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index e0f421e76305..f40b3342d82a 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -949,8 +949,12 @@ static void intel_pps_get_registers(struct intel_dp *intel_dp, regs->pp_stat = PP_STATUS(pps_idx); regs->pp_on = PP_ON_DELAYS(pps_idx); regs->pp_off = PP_OFF_DELAYS(pps_idx); - if (!IS_GEN9_LP(dev_priv) && !HAS_PCH_CNP(dev_priv) && - !HAS_PCH_ICP(dev_priv)) + + /* Cycle delay moved from PP_DIVISOR to PP_CONTROL */ + if (IS_GEN9_LP(dev_priv) || HAS_PCH_CNP(dev_priv) || + HAS_PCH_ICP(dev_priv)) + regs->pp_div = INVALID_MMIO_REG; + else regs->pp_div = PP_DIVISOR(pps_idx); } @@ -6420,7 +6424,7 @@ static void intel_pps_readout_hw_state(struct intel_dp *intel_dp, struct edp_power_seq *seq) { struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); - u32 pp_on, pp_off, pp_div = 0, pp_ctl = 0; + u32 pp_on, pp_off, pp_ctl; struct pps_registers regs; intel_pps_get_registers(intel_dp, ®s); @@ -6433,10 +6437,6 @@ intel_pps_readout_hw_state(struct intel_dp *intel_dp, struct edp_power_seq *seq) pp_on = I915_READ(regs.pp_on); pp_off = I915_READ(regs.pp_off); - if (!IS_GEN9_LP(dev_priv) && !HAS_PCH_CNP(dev_priv) && - !HAS_PCH_ICP(dev_priv)) { - pp_div = I915_READ(regs.pp_div); - } /* Pull timing values out of registers */ seq->t1_t3 = (pp_on & PANEL_POWER_UP_DELAY_MASK) >> @@ -6451,13 +6451,17 @@ intel_pps_readout_hw_state(struct intel_dp *intel_dp, struct edp_power_seq *seq) seq->t10 = (pp_off & PANEL_POWER_DOWN_DELAY_MASK) >> PANEL_POWER_DOWN_DELAY_SHIFT; - if (IS_GEN9_LP(dev_priv) || HAS_PCH_CNP(dev_priv) || - HAS_PCH_ICP(dev_priv)) { + if (i915_mmio_reg_valid(regs.pp_div)) { + u32 pp_div; + + pp_div = I915_READ(regs.pp_div); + + seq->t11_t12 = ((pp_div & PANEL_POWER_CYCLE_DELAY_MASK) >> + PANEL_POWER_CYCLE_DELAY_SHIFT) * 1000; + + } else { seq->t11_t12 = ((pp_ctl & BXT_POWER_CYCLE_DELAY_MASK) >> BXT_POWER_CYCLE_DELAY_SHIFT) * 1000; - } else { - seq->t11_t12 = ((pp_div & PANEL_POWER_CYCLE_DELAY_MASK) >> - PANEL_POWER_CYCLE_DELAY_SHIFT) * 1000; } } @@ -6582,7 +6586,7 @@ intel_dp_init_panel_power_sequencer_registers(struct intel_dp *intel_dp, bool force_disable_vdd) { struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); - u32 pp_on, pp_off, pp_div, port_sel = 0; + u32 pp_on, pp_off, port_sel = 0; int div = dev_priv->rawclk_freq / 1000; struct pps_registers regs; enum port port = dp_to_dig_port(intel_dp)->base.port; @@ -6621,19 +6625,6 @@ intel_dp_init_panel_power_sequencer_registers(struct intel_dp *intel_dp, (seq->t8 << PANEL_LIGHT_ON_DELAY_SHIFT); pp_off = (seq->t9 << PANEL_LIGHT_OFF_DELAY_SHIFT) | (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) || HAS_PCH_CNP(dev_priv) || - HAS_PCH_ICP(dev_priv)) { - pp_div = I915_READ(regs.pp_ctrl); - pp_div &= ~BXT_POWER_CYCLE_DELAY_MASK; - pp_div |= (DIV_ROUND_UP(seq->t11_t12, 1000) - << BXT_POWER_CYCLE_DELAY_SHIFT); - } else { - pp_div = ((100 * div)/2 - 1) << PP_REFERENCE_DIVIDER_SHIFT; - pp_div |= (DIV_ROUND_UP(seq->t11_t12, 1000) - << PANEL_POWER_CYCLE_DELAY_SHIFT); - } /* Haswell doesn't have any port selection bits for the panel * power sequencer any more. */ @@ -6660,19 +6651,33 @@ intel_dp_init_panel_power_sequencer_registers(struct intel_dp *intel_dp, I915_WRITE(regs.pp_on, pp_on); I915_WRITE(regs.pp_off, pp_off); - if (IS_GEN9_LP(dev_priv) || HAS_PCH_CNP(dev_priv) || - HAS_PCH_ICP(dev_priv)) - I915_WRITE(regs.pp_ctrl, pp_div); - else + + /* + * Compute the divisor for the pp clock, simply match the Bspec formula. + */ + if (i915_mmio_reg_valid(regs.pp_div)) { + u32 pp_div; + + pp_div = ((100 * div) / 2 - 1) << PP_REFERENCE_DIVIDER_SHIFT; + pp_div |= (DIV_ROUND_UP(seq->t11_t12, 1000) << + PANEL_POWER_CYCLE_DELAY_SHIFT); I915_WRITE(regs.pp_div, pp_div); + } else { + u32 pp_ctl; + + pp_ctl = I915_READ(regs.pp_ctrl); + pp_ctl &= ~BXT_POWER_CYCLE_DELAY_MASK; + pp_ctl |= (DIV_ROUND_UP(seq->t11_t12, 1000) << + BXT_POWER_CYCLE_DELAY_SHIFT); + I915_WRITE(regs.pp_ctrl, pp_ctl); + } 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) || HAS_PCH_CNP(dev_priv) || - HAS_PCH_ICP(dev_priv)) ? - (I915_READ(regs.pp_ctrl) & BXT_POWER_CYCLE_DELAY_MASK) : - I915_READ(regs.pp_div)); + i915_mmio_reg_valid(regs.pp_div) ? + I915_READ(regs.pp_div) : + (I915_READ(regs.pp_ctrl) & BXT_POWER_CYCLE_DELAY_MASK)); } static void intel_dp_pps_init(struct intel_dp *intel_dp) -- 2.30.2