[PATCH 1/5] drm/i915/display Add dg2_prog_squash_ctl() helper

[Anusha Srivatsa]

This is a prep patch. Modularising steps and moving them out of
and not cram everything in bxt_set_cdclk().

Signed-off-by: Anusha Srivatsa <anusha.srivatsa at intel.com>
---
 drivers/gpu/drm/i915/display/intel_cdclk.c | 23 +++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c
index ed05070b7307..220d32adbd12 100644
--- a/drivers/gpu/drm/i915/display/intel_cdclk.c
+++ b/drivers/gpu/drm/i915/display/intel_cdclk.c
@@ -1689,6 +1689,18 @@ static u32 cdclk_squash_waveform(struct drm_i915_private *dev_priv,
 	return 0xffff;
 }
 
+static void dg2_prog_squash_ctl(struct drm_i915_private *i915, u16 waveform)
+{
+	u32 squash_ctl = 0;
+
+	if (waveform) {
+		squash_ctl |= CDCLK_SQUASH_ENABLE;
+		squash_ctl |= CDCLK_SQUASH_WINDOW_SIZE(0xf) | waveform;
+	}
+
+	intel_de_write(i915, CDCLK_SQUASH_CTL, squash_ctl);
+}
+
 static void bxt_set_cdclk(struct drm_i915_private *dev_priv,
 			  const struct intel_cdclk_config *cdclk_config,
 			  enum pipe pipe)
@@ -1747,15 +1759,8 @@ static void bxt_set_cdclk(struct drm_i915_private *dev_priv,
 	else
 		clock = cdclk;
 
-	if (has_cdclk_squasher(dev_priv)) {
-		u32 squash_ctl = 0;
-
-		if (waveform)
-			squash_ctl = CDCLK_SQUASH_ENABLE |
-				CDCLK_SQUASH_WINDOW_SIZE(0xf) | waveform;
-
-		intel_de_write(dev_priv, CDCLK_SQUASH_CTL, squash_ctl);
-	}
+	if (has_cdclk_squasher(dev_priv))
+		dg2_prog_squash_ctl(dev_priv, waveform);
 
 	val = bxt_cdclk_cd2x_div_sel(dev_priv, clock, vco) |
 		bxt_cdclk_cd2x_pipe(dev_priv, pipe) |
-- 
2.25.1