[PATCH 4/7] drm/i915/cnl: Extend WM workaround with IPC for CNL

[Mahesh Kumar]

From: "Kumar, Mahesh" <mahesh1.kumar at intel.com>

CNL:A & CNL:B have same workaround as KBL to increase wm level latency
by 4us if IPC is enabled.

Signed-off-by: Mahesh Kumar <mahesh1.kumar at intel.com>
---
 drivers/gpu/drm/i915/intel_pm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index dac0fcf8b54e..f2794d29f217 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4447,7 +4447,8 @@ static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
 	}
 
 	/* Display WA #1141: kbl,cfl */
-	if ((IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv)) &&
+	if ((IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv) ||
+	    IS_CNL_REVID(dev_priv, CNL_REVID_A0, CNL_REVID_B0)) &&
 	    dev_priv->ipc_enabled)
 		latency += 4;
 
-- 
2.13.0