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>
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 3d87838..26982d1 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -206,6 +206,8 @@
/* should match the index in the dev_priv->shared_dplls array */
enum intel_dpll_id id;
struct intel_dpll_hw_state hw_state;
+ /* The mode_set hook is optional and should be used together with the
+ * intel_prepare_shared_dpll function. */
void (*mode_set)(struct drm_i915_private *dev_priv,
struct intel_shared_dpll *pll);
void (*enable)(struct drm_i915_private *dev_priv,