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drm/i915: Document that the pll->mode_set hook is optional
The WRPLLs won't use them. Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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@ -206,6 +206,8 @@ struct intel_shared_dpll {
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/* should match the index in the dev_priv->shared_dplls array */
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enum intel_dpll_id id;
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struct intel_dpll_hw_state hw_state;
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/* The mode_set hook is optional and should be used together with the
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* intel_prepare_shared_dpll function. */
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void (*mode_set)(struct drm_i915_private *dev_priv,
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struct intel_shared_dpll *pll);
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void (*enable)(struct drm_i915_private *dev_priv,
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