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drm/i915/icl: Ensure port A combo PHY HW state is correct
authorImre Deak <imre.deak@intel.com>
Fri, 31 May 2019 08:26:26 +0000 (11:26 +0300)
committerImre Deak <imre.deak@intel.com>
Sat, 1 Jun 2019 15:15:37 +0000 (18:15 +0300)
Make sure the HW state of the port A combo PHY is correct wrt. the
IREFGEN setting. This will force a reprogramming during init or a WARN
during uninit if the setting is incorrect.

On my ICL RVP I haven't seen this check failing and leading to a forced
reinit/WARN, but let's add it still for consistency.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190531082626.30640-1-imre.deak@intel.com
drivers/gpu/drm/i915/intel_combo_phy.c

index 98213cc..841708d 100644 (file)
@@ -198,6 +198,10 @@ static bool icl_combo_phy_verify_state(struct drm_i915_private *dev_priv,
 
        ret = cnl_verify_procmon_ref_values(dev_priv, port);
 
+       if (port == PORT_A)
+               ret &= check_phy_reg(dev_priv, port, ICL_PORT_COMP_DW8(port),
+                                    IREFGEN, IREFGEN);
+
        ret &= check_phy_reg(dev_priv, port, ICL_PORT_CL_DW5(port),
                             CL_POWER_DOWN_ENABLE, CL_POWER_DOWN_ENABLE);