Introduce definition of a hybrid log-gamma electro-optical transfer
function for 1D Curve colorops.

Signed-off-by: Nícolas F. R. A. Prado <redacted>
---
 drivers/gpu/drm/drm_colorop.c |  1 +
 include/drm/drm_colorop.h     | 10 ++++++++++
 2 files changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/drm_colorop.c b/drivers/gpu/drm/drm_colorop.c
index fafe45b93ff8..a19e03fb9c7c 100644
--- a/drivers/gpu/drm/drm_colorop.c
+++ b/drivers/gpu/drm/drm_colorop.c

@@ -79,6 +79,7 @@ static const char * const colorop_curve_1d_type_names[] = {
 	[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",
+	[DRM_COLOROP_1D_CURVE_HLG_EOTF] = "HLG",
 };
 
 static const struct drm_prop_enum_list drm_colorop_lut1d_interpolation_list[] = {

diff --git a/include/drm/drm_colorop.h b/include/drm/drm_colorop.h
index ee6454b08b2d..8ec98521607d 100644
--- a/include/drm/drm_colorop.h
+++ b/include/drm/drm_colorop.h

@@ -126,6 +126,16 @@ enum drm_colorop_curve_1d_type {
 	 * The inverse of &DRM_COLOROP_1D_CURVE_GAMMA22
 	 */
 	DRM_COLOROP_1D_CURVE_GAMMA22_INV,
+
+	/**
+	 * @DRM_COLOROP_1D_CURVE_HLG_EOTF:
+	 *
+	 * enum string "HLG"
+	 *
+	 * Hybrid log-gamma transfer function.
+	 */
+	DRM_COLOROP_1D_CURVE_HLG_EOTF,
+