drm/colorop: Add 1D Curve subtype

Add a new drm_colorop with DRM_COLOROP_1D_CURVE with two subtypes:
DRM_COLOROP_1D_CURVE_SRGB_EOTF and DRM_COLOROP_1D_CURVE_SRGB_INV_EOTF.

Reviewed-by: Simon Ser <contact@emersion.fr>
Reviewed-by: Louis Chauvet <louis.chauvet@bootlin.com>
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Co-developed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Melissa Wen <mwen@igalia.com>
Reviewed-by: Sebastian Wick <sebastian.wick@redhat.com>
Signed-off-by: Simon Ser <contact@emersion.fr>
Link: https://patch.msgid.link/20251115000237.3561250-7-alex.hung@amd.com

1 files changed, 62 insertions, 0 deletions

diff --git a/include/drm/drm_colorop.h b/include/drm/drm_colorop.h
index 0bda70f4e82a..3594e50cfd68 100644
--- a/include/drm/drm_colorop.h
+++ b/include/drm/drm_colorop.h
@@ -32,6 +32,41 @@
 #include <drm/drm_property.h>
 
 /**
+ * enum drm_colorop_curve_1d_type - type of 1D curve
+ *
+ * Describes a 1D curve to be applied by the DRM_COLOROP_1D_CURVE colorop.
+ */
+enum drm_colorop_curve_1d_type {
+	/**
+	 * @DRM_COLOROP_1D_CURVE_SRGB_EOTF:
+	 *
+	 * enum string "sRGB EOTF"
+	 *
+	 * sRGB piece-wise electro-optical transfer function. Transfer
+	 * characteristics as defined by IEC 61966-2-1 sRGB. Equivalent
+	 * to H.273 TransferCharacteristics code point 13 with
+	 * MatrixCoefficients set to 0.
+	 */
+	DRM_COLOROP_1D_CURVE_SRGB_EOTF,
+
+	/**
+	 * @DRM_COLOROP_1D_CURVE_SRGB_INV_EOTF:
+	 *
+	 * enum string "sRGB Inverse EOTF"
+	 *
+	 * The inverse of &DRM_COLOROP_1D_CURVE_SRGB_EOTF
+	 */
+	DRM_COLOROP_1D_CURVE_SRGB_INV_EOTF,
+
+	/**
+	 * @DRM_COLOROP_1D_CURVE_COUNT:
+	 *
+	 * enum value denoting the size of the enum
+	 */
+	DRM_COLOROP_1D_CURVE_COUNT
+};
+
+/**
  * struct drm_colorop_state - mutable colorop state
  */
 struct drm_colorop_state {
@@ -46,6 +81,13 @@ struct drm_colorop_state {
 	 * information.
 	 */
 
+	/**
+	 * @curve_1d_type:
+	 *
+	 * Type of 1D curve.
+	 */
+	enum drm_colorop_curve_1d_type curve_1d_type;
+
 	/** @state: backpointer to global drm_atomic_state */
 	struct drm_atomic_state *state;
 };
@@ -127,6 +169,14 @@ struct drm_colorop {
 	 * this color operation. The type is enum drm_colorop_type.
 	 */
 	struct drm_property *type_property;
+
+	/**
+	 * @curve_1d_type_property:
+	 *
+	 * Sub-type for DRM_COLOROP_1D_CURVE type.
+	 */
+	struct drm_property *curve_1d_type_property;
+
 };
 
 #define obj_to_colorop(x) container_of(x, struct drm_colorop, base)
@@ -151,6 +201,9 @@ static inline struct drm_colorop *drm_colorop_find(struct drm_device *dev,
 	return mo ? obj_to_colorop(mo) : NULL;
 }
 
+int drm_plane_colorop_curve_1d_init(struct drm_device *dev, struct drm_colorop *colorop,
+				    struct drm_plane *plane, u64 supported_tfs);
+
 struct drm_colorop_state *
 drm_atomic_helper_colorop_duplicate_state(struct drm_colorop *colorop);
 
@@ -190,4 +243,13 @@ static inline unsigned int drm_colorop_index(const struct drm_colorop *colorop)
  */
 const char *drm_get_colorop_type_name(enum drm_colorop_type type);
 
+/**
+ * drm_get_colorop_curve_1d_type_name - return a string for 1D curve type
+ * @type: 1d curve type to compute name of
+ *
+ * In contrast to the other drm_get_*_name functions this one here returns a
+ * const pointer and hence is threadsafe.
+ */
+const char *drm_get_colorop_curve_1d_type_name(enum drm_colorop_curve_1d_type type);
+
 #endif /* __DRM_COLOROP_H__ */