[Intel-gfx] [PATCH] drm/i915: Move hotplug inversion logic into separate helper

[Gustavo Sousa <gustavo.sousa@intel.com>]

Make the code more readable, which will be more apparent as new
platforms with different hotplug inversion needs are added.

Signed-off-by: Gustavo Sousa <gustavo.sousa@intel.com>
---
 drivers/gpu/drm/i915/i915_irq.c | 25 ++++++++++++++++---------
 1 file changed, 16 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index de06f293e173..c53d21ae197f 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -3263,6 +3263,21 @@ static void cherryview_irq_reset(struct drm_i915_private *dev_priv)
 	spin_unlock_irq(&dev_priv->irq_lock);
 }
 
+static void setup_hotplug_inversion(struct drm_i915_private *dev_priv)
+{
+	u32 invert_bits;
+
+	if (HAS_PCH_DG1(dev_priv))
+		invert_bits = INVERT_DDIA_HPD |
+			      INVERT_DDIB_HPD |
+			      INVERT_DDIC_HPD |
+			      INVERT_DDID_HPD;
+	else
+		return;
+
+	intel_uncore_rmw(&dev_priv->uncore, SOUTH_CHICKEN1, 0, invert_bits);
+}
+
 static u32 ibx_hotplug_enables(struct drm_i915_private *i915,
 			       enum hpd_pin pin)
 {
@@ -3413,15 +3428,7 @@ static u32 gen11_hotplug_enables(struct drm_i915_private *i915,
 
 static void dg1_hpd_irq_setup(struct drm_i915_private *dev_priv)
 {
-	u32 val;
-
-	val = intel_uncore_read(&dev_priv->uncore, SOUTH_CHICKEN1);
-	val |= (INVERT_DDIA_HPD |
-		INVERT_DDIB_HPD |
-		INVERT_DDIC_HPD |
-		INVERT_DDID_HPD);
-	intel_uncore_write(&dev_priv->uncore, SOUTH_CHICKEN1, val);
-
+	setup_hotplug_inversion(dev_priv);
 	icp_hpd_irq_setup(dev_priv);
 }
 
-- 
2.37.3