[Intel-gfx] [PATCH v2 2/6] drm/i915: Introduce i9xx_has_pfit()

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Make the code self-documenting by introducing i9xx_has_pfit().
Also make PNV an exceptional case so that we can unset
.is_mobile for the desktop variant.

v2: s/gen4/gen>=4/ (Tvrtko)

Cc: Tvrtko Ursulin <tvrtko.ursulin at linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 61acbaf2af75..98270d0cd763 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -7961,14 +7961,22 @@ static int vlv_crtc_compute_clock(struct intel_crtc *crtc,
 	return 0;
 }
 
+static bool i9xx_has_pfit(struct drm_i915_private *dev_priv)
+{
+	if (IS_I830(dev_priv))
+		return false;
+
+	return INTEL_GEN(dev_priv) >= 4 ||
+		IS_PINEVIEW(dev_priv) || IS_MOBILE(dev_priv);
+}
+
 static void i9xx_get_pfit_config(struct intel_crtc *crtc,
 				 struct intel_crtc_state *pipe_config)
 {
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	u32 tmp;
 
-	if (INTEL_GEN(dev_priv) <= 3 &&
-	    (IS_I830(dev_priv) || !IS_MOBILE(dev_priv)))
+	if (!i9xx_has_pfit(dev_priv))
 		return;
 
 	tmp = I915_READ(PFIT_CONTROL);
-- 
2.19.2