drm/i915: Extract ilk_csc_limited_range()

Extract a helper which determines if we need to use the
pipe CSC for limited range RGB output.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190218193137.22914-4-ville.syrjala@linux.intel.com
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
index b9cfce4..f27bb5c 100644 (file)
--- a/drivers/gpu/drm/i915/intel_color.c
+++ b/drivers/gpu/drm/i915/intel_color.c
@@ -161,22 +161,28 @@ static void ilk_load_ycbcr_conversion_matrix(struct intel_crtc *crtc)
        }
 }
 
+static bool ilk_csc_limited_range(const struct intel_crtc_state *crtc_state)
+{
+       struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+
+       /*
+        * FIXME if there's a gamma LUT after the CSC, we should
+        * do the range compression using the gamma LUT instead.
+        */
+       return crtc_state->limited_color_range &&
+               (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv) ||
+                IS_GEN_RANGE(dev_priv, 9, 10));
+}
+
 static void ilk_load_csc_matrix(const struct intel_crtc_state *crtc_state)
 {
        struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
        struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
-       bool limited_color_range = false;
+       bool limited_color_range = ilk_csc_limited_range(crtc_state);
        enum pipe pipe = crtc->pipe;
        u16 coeffs[9] = {};
        int i;
 
-       /*
-        * FIXME if there's a gamma LUT after the CSC, we should
-        * do the range compression using the gamma LUT instead.
-        */
-       if (INTEL_GEN(dev_priv) >= 8 || IS_HASWELL(dev_priv))
-               limited_color_range = crtc_state->limited_color_range;
-
        if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420 ||
            crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR444) {
                ilk_load_ycbcr_conversion_matrix(crtc);