[PATCH 3/5] drm/i915/display: DFSM CDCLK LIMIT is only available in BXT

[José Roberto de Souza]

On GLK those registers are reserved and on another gens it have
another meaning, so renaming it to BXT only.

BSpec: 7548
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
 drivers/gpu/drm/i915/display/intel_cdclk.c | 12 +++++-------
 drivers/gpu/drm/i915/i915_reg.h            | 10 +++++-----
 2 files changed, 10 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c
index 43564295b864..a1787d165467 100644
--- a/drivers/gpu/drm/i915/display/intel_cdclk.c
+++ b/drivers/gpu/drm/i915/display/intel_cdclk.c
@@ -2384,8 +2384,8 @@ void intel_update_max_cdclk(struct drm_i915_private *dev_priv)
 			dev_priv->max_cdclk_freq = 652800;
 	} else if (IS_CANNONLAKE(dev_priv)) {
 		dev_priv->max_cdclk_freq = 528000;
-	} else if (IS_GEN9_BC(dev_priv)) {
-		u32 limit = I915_READ(SKL_DFSM) & SKL_DFSM_CDCLK_LIMIT_MASK;
+	} else if (IS_BROXTON(dev_priv)) {
+		u32 limit = I915_READ(SKL_DFSM) & BXT_DFSM_CDCLK_LIMIT_MASK;
 		int max_cdclk, vco;
 
 		vco = dev_priv->skl_preferred_vco_freq;
@@ -2396,11 +2396,11 @@ void intel_update_max_cdclk(struct drm_i915_private *dev_priv)
 		 * first guess. skl_calc_cdclk() will correct it
 		 * if the preferred vco is 8100 instead.
 		 */
-		if (limit == SKL_DFSM_CDCLK_LIMIT_675)
+		if (limit == BXT_DFSM_CDCLK_LIMIT_675)
 			max_cdclk = 617143;
-		else if (limit == SKL_DFSM_CDCLK_LIMIT_540)
+		else if (limit == BXT_DFSM_CDCLK_LIMIT_540)
 			max_cdclk = 540000;
-		else if (limit == SKL_DFSM_CDCLK_LIMIT_450)
+		else if (limit == BXT_DFSM_CDCLK_LIMIT_450)
 			max_cdclk = 432000;
 		else
 			max_cdclk = 308571;
@@ -2408,8 +2408,6 @@ void intel_update_max_cdclk(struct drm_i915_private *dev_priv)
 		dev_priv->max_cdclk_freq = skl_calc_cdclk(max_cdclk, vco);
 	} else if (IS_GEMINILAKE(dev_priv)) {
 		dev_priv->max_cdclk_freq = 316800;
-	} else if (IS_BROXTON(dev_priv)) {
-		dev_priv->max_cdclk_freq = 624000;
 	} else if (IS_BROADWELL(dev_priv))  {
 		/*
 		 * FIXME with extra cooling we can allow
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index b383511b6231..39c65f051468 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7644,11 +7644,11 @@ enum {
 
 #define SKL_DFSM			_MMIO(0x51000)
 #define SKL_DFSM_DISPLAY_HDCP_DISABLE	(1 << 25)
-#define SKL_DFSM_CDCLK_LIMIT_MASK	(3 << 23)
-#define SKL_DFSM_CDCLK_LIMIT_675	(0 << 23)
-#define SKL_DFSM_CDCLK_LIMIT_540	(1 << 23)
-#define SKL_DFSM_CDCLK_LIMIT_450	(2 << 23)
-#define SKL_DFSM_CDCLK_LIMIT_337_5	(3 << 23)
+#define BXT_DFSM_CDCLK_LIMIT_MASK	(3 << 23)
+#define BXT_DFSM_CDCLK_LIMIT_675	(0 << 23)
+#define BXT_DFSM_CDCLK_LIMIT_540	(1 << 23)
+#define BXT_DFSM_CDCLK_LIMIT_450	(2 << 23)
+#define BXT_DFSM_CDCLK_LIMIT_337_5	(3 << 23)
 #define SKL_DFSM_PIPE_A_DISABLE		(1 << 30)
 #define SKL_DFSM_PIPE_B_DISABLE		(1 << 21)
 #define SKL_DFSM_PIPE_C_DISABLE		(1 << 28)
-- 
2.23.0