drm/i915/icl: add icelake_get_ddi_pll()

Implement the hardware state readout code.

Thanks to Animesh Manna for spotting this problem.

Cc: Animesh Manna <animesh.manna@intel.com>
Credits-to: Animesh Manna <animesh.manna@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180522002558.29262-11-paulo.r.zanoni@intel.com

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 05abd23..1ac3758 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9209,6 +9209,44 @@ static void cannonlake_get_ddi_pll(struct drm_i915_private *dev_priv,
        pipe_config->shared_dpll = intel_get_shared_dpll_by_id(dev_priv, id);
 }
 
+static void icelake_get_ddi_pll(struct drm_i915_private *dev_priv,
+                               enum port port,
+                               struct intel_crtc_state *pipe_config)
+{
+       enum intel_dpll_id id;
+       u32 temp;
+
+       /* TODO: TBT pll not implemented. */
+       switch (port) {
+       case PORT_A:
+       case PORT_B:
+               temp = I915_READ(DPCLKA_CFGCR0_ICL) &
+                      DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port);
+               id = temp >> DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(port);
+
+               if (WARN_ON(id != DPLL_ID_ICL_DPLL0 && id != DPLL_ID_ICL_DPLL1))
+                       return;
+               break;
+       case PORT_C:
+               id = DPLL_ID_ICL_MGPLL1;
+               break;
+       case PORT_D:
+               id = DPLL_ID_ICL_MGPLL2;
+               break;
+       case PORT_E:
+               id = DPLL_ID_ICL_MGPLL3;
+               break;
+       case PORT_F:
+               id = DPLL_ID_ICL_MGPLL4;
+               break;
+       default:
+               MISSING_CASE(port);
+               return;
+       }
+
+       pipe_config->shared_dpll = intel_get_shared_dpll_by_id(dev_priv, id);
+}
+
 static void bxt_get_ddi_pll(struct drm_i915_private *dev_priv,
                                enum port port,
                                struct intel_crtc_state *pipe_config)
@@ -9396,7 +9434,9 @@ static void haswell_get_ddi_port_state(struct intel_crtc *crtc,
 
        port = (tmp & TRANS_DDI_PORT_MASK) >> TRANS_DDI_PORT_SHIFT;
 
-       if (IS_CANNONLAKE(dev_priv))
+       if (IS_ICELAKE(dev_priv))
+               icelake_get_ddi_pll(dev_priv, port, pipe_config);
+       else if (IS_CANNONLAKE(dev_priv))
                cannonlake_get_ddi_pll(dev_priv, port, pipe_config);
        else if (IS_GEN9_BC(dev_priv))
                skylake_get_ddi_pll(dev_priv, port, pipe_config);