[Intel-gfx] [RFC v1 7/7] drm/i915: Add multi segment gamma for icl

[Uma Shankar]

Added support for ICL platform multi segment gamma
capabilties and attached the property, exposing the
same to userspace.

Signed-off-by: Uma Shankar <uma.shankar at intel.com>
---
 drivers/gpu/drm/i915/intel_color.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
index 7733c256..1e9f784 100644
--- a/drivers/gpu/drm/i915/intel_color.c
+++ b/drivers/gpu/drm/i915/intel_color.c
@@ -1011,6 +1011,8 @@ int intel_color_check(struct intel_crtc_state *crtc_state)
 void intel_color_init(struct intel_crtc *crtc)
 {
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct multi_segment_gamma_lut multi_segment_lut;
+
 
 	drm_mode_crtc_set_gamma_size(&crtc->base, 256);
 
@@ -1049,6 +1051,24 @@ void intel_color_init(struct intel_crtc *crtc)
 
 	intel_attach_gamma_mode_property(crtc);
 
-	if (INTEL_GEN(dev_priv) >= 11)
+	if (IS_ICELAKE(dev_priv)) {
+		multi_segment_lut.segment_cnt = 3;
+		multi_segment_lut.precision_bits = 16;
+		multi_segment_lut.segment_lut_cnt_ptr = kzalloc(3 * sizeof(int),
+								GFP_KERNEL);
+		if (!multi_segment_lut.segment_lut_cnt_ptr)
+			return;
+		multi_segment_lut.segment_lut_cnt_ptr[0] = 9;
+		multi_segment_lut.segment_lut_cnt_ptr[1] = 256;
+		multi_segment_lut.segment_lut_cnt_ptr[2] = 256;
+
 		intel_attach_multi_segment_gamma_mode_property(crtc);
+
+		drm_property_replace_global_blob(crtc->base.dev,
+						 &crtc->config->multi_segment_gamma_lut,
+						 sizeof(struct multi_segment_gamma_lut),
+						 &multi_segment_lut,
+						 &crtc->base.base,
+						 dev_priv->multi_segment_gamma_mode_property);
+	}
 }
-- 
1.9.1