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

2 files changed, 145 insertions, 4 deletions

diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
index 55b3046c5f1c..e01eaab9b2f7 100644
--- a/drivers/gpu/drm/drm_atomic_uapi.c
+++ b/drivers/gpu/drm/drm_atomic_uapi.c
@@ -655,10 +655,17 @@ static int drm_atomic_colorop_set_property(struct drm_colorop *colorop,
 					   struct drm_property *property,
 					   uint64_t val)
 {
-	drm_dbg_atomic(colorop->dev,
-		       "[COLOROP:%d] unknown property [PROP:%d:%s]]\n",
-		       colorop->base.id, property->base.id, property->name);
-	return -EINVAL;
+	if (property == colorop->curve_1d_type_property) {
+		state->curve_1d_type = val;
+	} else {
+		drm_dbg_atomic(colorop->dev,
+			       "[COLOROP:%d:%d] unknown property [PROP:%d:%s]\n",
+			       colorop->base.id, colorop->type,
+			       property->base.id, property->name);
+		return -EINVAL;
+	}
+
+	return 0;
 }
 
 static int
@@ -668,6 +675,8 @@ drm_atomic_colorop_get_property(struct drm_colorop *colorop,
 {
 	if (property == colorop->type_property)
 		*val = colorop->type;
+	else if (property == colorop->curve_1d_type_property)
+		*val = state->curve_1d_type;
 	else
 		return -EINVAL;
 
diff --git a/drivers/gpu/drm/drm_colorop.c b/drivers/gpu/drm/drm_colorop.c
index d0e839a1df7c..81c55e0639c3 100644
--- a/drivers/gpu/drm/drm_colorop.c
+++ b/drivers/gpu/drm/drm_colorop.c
@@ -31,6 +31,121 @@
 
 #include "drm_crtc_internal.h"
 
+static const struct drm_prop_enum_list drm_colorop_type_enum_list[] = {
+	{ DRM_COLOROP_1D_CURVE, "1D Curve" },
+};
+
+static const char * const colorop_curve_1d_type_names[] = {
+	[DRM_COLOROP_1D_CURVE_SRGB_EOTF] = "sRGB EOTF",
+	[DRM_COLOROP_1D_CURVE_SRGB_INV_EOTF] = "sRGB Inverse EOTF",
+};
+
+/* Init Helpers */
+
+static int drm_plane_colorop_init(struct drm_device *dev, struct drm_colorop *colorop,
+				  struct drm_plane *plane, enum drm_colorop_type type)
+{
+	struct drm_mode_config *config = &dev->mode_config;
+	struct drm_property *prop;
+	int ret = 0;
+
+	ret = drm_mode_object_add(dev, &colorop->base, DRM_MODE_OBJECT_COLOROP);
+	if (ret)
+		return ret;
+
+	colorop->base.properties = &colorop->properties;
+	colorop->dev = dev;
+	colorop->type = type;
+	colorop->plane = plane;
+
+	list_add_tail(&colorop->head, &config->colorop_list);
+	colorop->index = config->num_colorop++;
+
+	/* add properties */
+
+	/* type */
+	prop = drm_property_create_enum(dev,
+					DRM_MODE_PROP_IMMUTABLE,
+					"TYPE", drm_colorop_type_enum_list,
+					ARRAY_SIZE(drm_colorop_type_enum_list));
+
+	if (!prop)
+		return -ENOMEM;
+
+	colorop->type_property = prop;
+
+	drm_object_attach_property(&colorop->base,
+				   colorop->type_property,
+				   colorop->type);
+
+	return ret;
+}
+
+/**
+ * drm_plane_colorop_curve_1d_init - Initialize a DRM_COLOROP_1D_CURVE
+ *
+ * @dev: DRM device
+ * @colorop: The drm_colorop object to initialize
+ * @plane: The associated drm_plane
+ * @supported_tfs: A bitfield of supported drm_plane_colorop_curve_1d_init enum values,
+ *                 created using BIT(curve_type) and combined with the OR '|'
+ *                 operator.
+ * @return zero on success, -E value on failure
+ */
+int drm_plane_colorop_curve_1d_init(struct drm_device *dev, struct drm_colorop *colorop,
+				    struct drm_plane *plane, u64 supported_tfs)
+{
+	struct drm_prop_enum_list enum_list[DRM_COLOROP_1D_CURVE_COUNT];
+	int i, len;
+
+	struct drm_property *prop;
+	int ret;
+
+	if (!supported_tfs) {
+		drm_err(dev,
+			"No supported TFs for new 1D curve colorop on [PLANE:%d:%s]\n",
+			plane->base.id, plane->name);
+		return -EINVAL;
+	}
+
+	if ((supported_tfs & -BIT(DRM_COLOROP_1D_CURVE_COUNT)) != 0) {
+		drm_err(dev, "Unknown TF provided on [PLANE:%d:%s]\n",
+			plane->base.id, plane->name);
+		return -EINVAL;
+	}
+
+	ret = drm_plane_colorop_init(dev, colorop, plane, DRM_COLOROP_1D_CURVE);
+	if (ret)
+		return ret;
+
+	len = 0;
+	for (i = 0; i < DRM_COLOROP_1D_CURVE_COUNT; i++) {
+		if ((supported_tfs & BIT(i)) == 0)
+			continue;
+
+		enum_list[len].type = i;
+		enum_list[len].name = colorop_curve_1d_type_names[i];
+		len++;
+	}
+
+	if (WARN_ON(len <= 0))
+		return -EINVAL;
+
+	/* initialize 1D curve only attribute */
+	prop = drm_property_create_enum(dev, DRM_MODE_PROP_ATOMIC, "CURVE_1D_TYPE",
+					enum_list, len);
+	if (!prop)
+		return -ENOMEM;
+
+	colorop->curve_1d_type_property = prop;
+	drm_object_attach_property(&colorop->base, colorop->curve_1d_type_property,
+				   enum_list[0].type);
+	drm_colorop_reset(colorop);
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_plane_colorop_curve_1d_init);
+
 static void __drm_atomic_helper_colorop_duplicate_state(struct drm_colorop *colorop,
 							struct drm_colorop_state *state)
 {
@@ -69,7 +184,16 @@ void drm_colorop_atomic_destroy_state(struct drm_colorop *colorop,
 static void __drm_colorop_state_reset(struct drm_colorop_state *colorop_state,
 				      struct drm_colorop *colorop)
 {
+	u64 val;
+
 	colorop_state->colorop = colorop;
+
+	if (colorop->curve_1d_type_property) {
+		drm_object_property_get_default_value(&colorop->base,
+						      colorop->curve_1d_type_property,
+						      &val);
+		colorop_state->curve_1d_type = val;
+	}
 }
 
 /**
@@ -113,3 +237,11 @@ const char *drm_get_colorop_type_name(enum drm_colorop_type type)
 
 	return colorop_type_name[type];
 }
+
+const char *drm_get_colorop_curve_1d_type_name(enum drm_colorop_curve_1d_type type)
+{
+	if (WARN_ON(type >= ARRAY_SIZE(colorop_curve_1d_type_names)))
+		return "unknown";
+
+	return colorop_curve_1d_type_names[type];
+}