Multi Segment Gamma Mode is added in Gen11+ platforms.
Added a property interface to enable that.
Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_drv.h | 1 +
drivers/gpu/drm/i915/intel_color.c | 23 +++++++++++++++++++++++
include/uapi/drm/i915_drm.h | 14 ++++++++++++++
3 files changed, 38 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 02231ae..f20d418 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1736,6 +1736,7 @@ struct drm_i915_private {
struct drm_property *force_audio_property;
struct drm_property *gamma_mode_property;
+ struct drm_property *multi_segment_gamma_mode_property;
/* hda/i915 audio component */
struct i915_audio_component *audio_component;
diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
index 9d43d19..399d63d 100644
--- a/drivers/gpu/drm/i915/intel_color.c
+++ b/drivers/gpu/drm/i915/intel_color.c
@@ -149,6 +149,26 @@ static bool crtc_state_is_legacy_gamma(const struct intel_crtc_state *crtc_state
drm_object_attach_property(&crtc->base.base, prop, 0);
}
+void
+intel_attach_multi_segment_gamma_mode_property(struct intel_crtc *crtc)
+{
+ struct drm_device *dev = crtc->base.dev;
+ struct drm_i915_private *dev_priv = to_i915(dev);
+ struct drm_property *prop;
+
+ prop = dev_priv->multi_segment_gamma_mode_property;
+ if (!prop) {
+ prop = drm_property_create(dev, DRM_MODE_PROP_BLOB,
+ "Multi-segment Gamma", 0);
+ if (!prop)
+ return;
+
+ dev_priv->multi_segment_gamma_mode_property = prop;
+ }
+
+ drm_object_attach_property(&crtc->base.base, prop, 0);
+}
+
/*
* When using limited range, multiply the matrix given by userspace by
* the matrix that we would use for the limited range.
@@ -953,4 +973,7 @@ void intel_color_init(struct intel_crtc *crtc)
INTEL_INFO(dev_priv)->color.gamma_lut_size);
intel_attach_gamma_mode_property(crtc);
+
+ if (INTEL_GEN(dev_priv) >= 11)
+ intel_attach_multi_segment_gamma_mode_property(crtc);
}
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index aa2d4c7..8f1974e 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -1842,6 +1842,20 @@ struct drm_i915_query_topology_info {
__u8 data[];
};
+/*
+ * Structure for muti segmented gamma lut
+ */
+struct multi_segment_gamma_lut {
+ /* Number of Lut Segments */
+ __u8 segment_cnt;
+ /* Precison of LUT entries in bits */
+ __u8 precision_bits;
+ /* Pointer having number of LUT elements in each segment */
+ __u32 *segment_lut_cnt_ptr;
+ /* Pointer to store exact lut values for each segment */
+ __u32 *segment_lut_ptr;
+};
+
#if defined(__cplusplus)
}
#endif
--
1.9.1
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