From b0d6a0f27e2ce77dc48527404d3a15ebf1b5d26d Mon Sep 17 00:00:00 2001 From: Anusha Srivatsa Date: Thu, 11 Jan 2018 16:00:07 -0200 Subject: [PATCH] drm/i915/icp: Add Panel Power Sequencing Support ICP, like BXT, has has two panel power sequencers. v2: Simplify the code. Remove unwanted register definitions. Make code as close to BXT style as possible. (Ville) Also, remove the use of ICP_SECOND_PPS_BACKLIGHT for now. Moving forward, if we are sure we need to set this register, we can access it. v3: Use INTEL_GEN(dev_priv), make code more readeable. (Ville) v4 (from Paulo): - Coding style fixes. - Add a missing HAS_PCH_CNP -> gen10+ check. - Rebase. v5: Use per platform checks rather than INTEL_GEN(). v4 of this patch breaks on CoffeeLake, since CFL uses CNP and per platform check makes sense in that case. v6 (from Paulo): - v5 was a patch on top of v4, not a new version. Now v6 is correctly a new version of the original patch. Cc: Ville Syrjala Reviewed-by: Paulo Zanoni Signed-off-by: Anusha Srivatsa Signed-off-by: Paulo Zanoni Link: https://patchwork.freedesktop.org/patch/msgid/20180111180010.24357-6-paulo.r.zanoni@intel.com --- drivers/gpu/drm/i915/intel_dp.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 71721de39e6b..48342a85e500 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -794,7 +794,8 @@ 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)) + if (!IS_GEN9_LP(dev_priv) && !HAS_PCH_CNP(dev_priv) && + !HAS_PCH_ICP(dev_priv)) regs->pp_div = PP_DIVISOR(pps_idx); } @@ -5229,7 +5230,8 @@ 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)) { + if (!IS_GEN9_LP(dev_priv) && !HAS_PCH_CNP(dev_priv) && + !HAS_PCH_ICP(dev_priv)) { I915_WRITE(regs.pp_ctrl, pp_ctl); pp_div = I915_READ(regs.pp_div); } @@ -5247,7 +5249,8 @@ 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)) { + if (IS_GEN9_LP(dev_priv) || HAS_PCH_CNP(dev_priv) || + HAS_PCH_ICP(dev_priv)) { seq->t11_t12 = ((pp_ctl & BXT_POWER_CYCLE_DELAY_MASK) >> BXT_POWER_CYCLE_DELAY_SHIFT) * 1000; } else { @@ -5418,7 +5421,8 @@ intel_dp_init_panel_power_sequencer_registers(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) || HAS_PCH_CNP(dev_priv)) { + 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) @@ -5444,7 +5448,8 @@ 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)) + if (IS_GEN9_LP(dev_priv) || HAS_PCH_CNP(dev_priv) || + HAS_PCH_ICP(dev_priv)) I915_WRITE(regs.pp_ctrl, pp_div); else I915_WRITE(regs.pp_div, pp_div); @@ -5452,7 +5457,8 @@ intel_dp_init_panel_power_sequencer_registers(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) || HAS_PCH_CNP(dev_priv)) ? + (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)); }