drm/colorop: Add DRM_COLOROP_1D_CURVE_GAMMA22 to 1D Curve

Add "DRM_COLOROP_1D_CURVE_GAMMA22" and DRM_COLOROP_1D_CURVE_GAMMA22_INV
subtypes to drm_colorop of DRM_COLOROP_1D_CURVE.

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Simon Ser <contact@emersion.fr>
Link: https://patch.msgid.link/20251115000237.3561250-51-alex.hung@amd.com

Author: Alex Hung

drivers/gpu/drm/drm_colorop.c

@@ -77,6 +77,8 @@ static const char * const colorop_curve_1d_type_names[] = {
 	[DRM_COLOROP_1D_CURVE_PQ_125_INV_EOTF] = "PQ 125 Inverse EOTF",
 	[DRM_COLOROP_1D_CURVE_BT2020_INV_OETF] = "BT.2020 Inverse OETF",
 	[DRM_COLOROP_1D_CURVE_BT2020_OETF] = "BT.2020 OETF",
+	[DRM_COLOROP_1D_CURVE_GAMMA22] = "Gamma 2.2",
+	[DRM_COLOROP_1D_CURVE_GAMMA22_INV] = "Gamma 2.2 Inverse",
 };
 
 static const struct drm_prop_enum_list drm_colorop_lut1d_interpolation_list[] = {

include/drm/drm_colorop.h

@@ -108,6 +108,24 @@ enum drm_colorop_curve_1d_type {
 	 */
 	DRM_COLOROP_1D_CURVE_BT2020_OETF,
 
+	/**
+	 * @DRM_COLOROP_1D_CURVE_GAMMA22:
+	 *
+	 * enum string "Gamma 2.2"
+	 *
+	 * A gamma 2.2 power function. This applies a power curve with
+	 * gamma value of 2.2 to the input values.
+	 */
+	DRM_COLOROP_1D_CURVE_GAMMA22,
+
+	/**
+	 * @DRM_COLOROP_1D_CURVE_GAMMA22_INV:
+	 *
+	 * enum string "Gamma 2.2 Inverse"
+	 *
+	 * The inverse of &DRM_COLOROP_1D_CURVE_GAMMA22
+	 */
+	DRM_COLOROP_1D_CURVE_GAMMA22_INV,
 	/**
 	 * @DRM_COLOROP_1D_CURVE_COUNT:
 	 *