[PATCH 7/7] drm/i915/display: Add intel_cdclk_modeset()

[Anusha Srivatsa]

Signed-off-by: Anusha Srivatsa <anusha.srivatsa at intel.com>
---
 drivers/gpu/drm/i915/display/intel_cdclk.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c
index 33e99cc5403a..d61937fd0953 100644
--- a/drivers/gpu/drm/i915/display/intel_cdclk.c
+++ b/drivers/gpu/drm/i915/display/intel_cdclk.c
@@ -2006,6 +2006,21 @@ static bool intel_cdclk_can_squash(struct drm_i915_private *dev_priv,
 		a->ref == b->ref;
 }
 
+static void intel_cdclk_modeset(const struct intel_cdclk_config *a,
+			       const struct intel_cdclk_config *b,
+			       struct intel_cdclk_state *new_cdclk)
+{
+	struct cdclk_step *cdclk_transition = new_cdclk->steps;
+
+	if (a->cdclk != b->cdclk || a->vco != b->vco ||
+	    a->ref != b->ref) {
+		cdclk_transition->action = CDCLK_LEGACY;
+		cdclk_transition->cdclk = b->cdclk;
+
+	}
+	return;
+}
+
 /**
  * intel_cdclk_needs_modeset - Determine if changong between the CDCLK
  *                             configurations requires a modeset on all pipes
@@ -2798,6 +2813,9 @@ int intel_modeset_calc_cdclk(struct intel_atomic_state *state)
 			    pipe_name(pipe));
 	} else if (intel_cdclk_needs_modeset(&old_cdclk_state->actual,
 					     &new_cdclk_state->actual)) {
+		intel_cdclk_modeset(&old_cdclk_state->actual,
+				    &new_cdclk_state->actual,
+				    new_cdclk_state);
 		/* All pipes must be switched off while we change the cdclk. */
 		ret = intel_modeset_all_pipes(state);
 		if (ret)
-- 
2.25.1