Re: [PATCH 2/6] drm/i915: Introduce i9xx_has_pfit()

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On 18/03/2019 16:56, Ville Syrjala wrote:
From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>

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.

Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxxxxxxx>
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
  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..0ddd83dbd768 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 IS_GEN(dev_priv, 4) ||

Shouldn't this be INTEL_GEN() >= 4 || ... ? Or even this check alone as first in the function.

+		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);


Regards,

Tvrtko
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