From 98a5c2a3582a86d5acdcdeabbe0e6278e712201e Mon Sep 17 00:00:00 2001 From: Lucas De Marchi Date: Fri, 12 Jul 2019 18:09:19 -0700 Subject: [PATCH] drm/i915/tgl: skip setting PORT_CL_DW12_* on initialization MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit According to the spec when initializing the display in TGL we should not set PORT_CL_DW12 for the Aux channel of the combo PHYs. We will re-use the power well hooks from ICL so only set this register on gen < 12. v2: Generalize check for gen 12 (suggested by José) v3: Rebase after enum phy introduction Cc: Imre Deak Cc: Matt Roper Signed-off-by: Lucas De Marchi Reviewed-by: José Roberto de Souza Reviewed-by: Matt Atwood Link: https://patchwork.freedesktop.org/patch/msgid/20190713010940.17711-2-lucas.demarchi@intel.com --- drivers/gpu/drm/i915/display/intel_display_power.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c index 93a148684c53..dd2a50b8ba0a 100644 --- a/drivers/gpu/drm/i915/display/intel_display_power.c +++ b/drivers/gpu/drm/i915/display/intel_display_power.c @@ -458,8 +458,10 @@ icl_combo_phy_aux_power_well_enable(struct drm_i915_private *dev_priv, val = I915_READ(regs->driver); I915_WRITE(regs->driver, val | HSW_PWR_WELL_CTL_REQ(pw_idx)); - val = I915_READ(ICL_PORT_CL_DW12(phy)); - I915_WRITE(ICL_PORT_CL_DW12(phy), val | ICL_LANE_ENABLE_AUX); + if (INTEL_GEN(dev_priv) < 12) { + val = I915_READ(ICL_PORT_CL_DW12(phy)); + I915_WRITE(ICL_PORT_CL_DW12(phy), val | ICL_LANE_ENABLE_AUX); + } hsw_wait_for_power_well_enable(dev_priv, power_well); @@ -487,8 +489,10 @@ icl_combo_phy_aux_power_well_disable(struct drm_i915_private *dev_priv, enum phy phy = ICL_AUX_PW_TO_PHY(pw_idx); u32 val; - val = I915_READ(ICL_PORT_CL_DW12(phy)); - I915_WRITE(ICL_PORT_CL_DW12(phy), val & ~ICL_LANE_ENABLE_AUX); + if (INTEL_GEN(dev_priv) < 12) { + val = I915_READ(ICL_PORT_CL_DW12(phy)); + I915_WRITE(ICL_PORT_CL_DW12(phy), val & ~ICL_LANE_ENABLE_AUX); + } val = I915_READ(regs->driver); I915_WRITE(regs->driver, val & ~HSW_PWR_WELL_CTL_REQ(pw_idx));