[RFC PATCH v3 09/23] drm/color: Add 1D Curve subtype

[Harry Wentland]

Signed-off-by: Harry Wentland <harry.wentland at amd.com>
---
 drivers/gpu/drm/drm_atomic_uapi.c | 18 ++++++++++----
 drivers/gpu/drm/drm_colorop.c     | 39 +++++++++++++++++++++++++++++++
 include/drm/drm_colorop.h         | 20 ++++++++++++++++
 3 files changed, 72 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/drm_atomic_uapi.c b/drivers/gpu/drm/drm_atomic_uapi.c
index f22bd8671236..52b9b48e5757 100644
--- a/drivers/gpu/drm/drm_atomic_uapi.c
+++ b/drivers/gpu/drm/drm_atomic_uapi.c
@@ -670,11 +670,17 @@ static int drm_atomic_colorop_set_property(struct drm_colorop *colorop,
 		struct drm_colorop_state *state, struct drm_file *file_priv,
 		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
@@ -684,6 +690,8 @@ 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 902b13e300fd..b1c271f90a16 100644
--- a/drivers/gpu/drm/drm_colorop.c
+++ b/drivers/gpu/drm/drm_colorop.c
@@ -36,6 +36,11 @@ static const struct drm_prop_enum_list drm_colorop_type_enum_list[] = {
 	{ DRM_COLOROP_1D_CURVE, "1D Curve" },
 };
 
+static const struct drm_prop_enum_list drm_colorop_curve_1d_type_enum_list[] = {
+	{ DRM_COLOROP_1D_CURVE_SRGB_EOTF, "sRGB EOTF" },
+	{ DRM_COLOROP_1D_CURVE_SRGB_INV_EOTF, "sRGB Inverse EOTF" },
+};
+
 /* Init Helpers */
 
 int drm_colorop_init(struct drm_device *dev, struct drm_colorop *colorop,
@@ -73,6 +78,20 @@ int drm_colorop_init(struct drm_device *dev, struct drm_colorop *colorop,
 				   colorop->type_property,
 				   colorop->type);
 
+	/* curve_1d_type */
+	/* TODO move to mode_config? */
+	prop = drm_property_create_enum(dev, DRM_MODE_PROP_ATOMIC,
+					"CURVE_1D_TYPE",
+					drm_colorop_curve_1d_type_enum_list,
+					ARRAY_SIZE(drm_colorop_curve_1d_type_enum_list));
+	if (!prop)
+		return -ENOMEM;
+
+	colorop->curve_1d_type_property = prop;
+	drm_object_attach_property(&colorop->base,
+				   colorop->curve_1d_type_property,
+				   0);
+
 	return ret;
 }
 EXPORT_SYMBOL(drm_colorop_init);
@@ -177,6 +196,11 @@ static const char * const colorop_type_name[] = {
 	[DRM_COLOROP_1D_CURVE] = "1D Curve",
 };
 
+static const char * const colorop_curve_1d_type_name[] = {
+	[DRM_COLOROP_1D_CURVE_SRGB_EOTF] = "sRGB EOTF",
+	[DRM_COLOROP_1D_CURVE_SRGB_INV_EOTF] = "sRGB Inverse EOTF",
+};
+
 /**
  * drm_get_colorop_type_name - return a string for colorop type
  * @type: colorop type to compute name of
@@ -191,3 +215,18 @@ const char *drm_get_colorop_type_name(enum drm_colorop_type type)
 
 	return colorop_type_name[type];
 }
+
+/**
+ * drm_get_colorop_curve_1d_type_name - return a string for 1D curve type
+ * @range: 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)
+{
+	if (WARN_ON(type >= ARRAY_SIZE(colorop_curve_1d_type_name)))
+		return "unknown";
+
+	return colorop_curve_1d_type_name[type];
+}
diff --git a/include/drm/drm_colorop.h b/include/drm/drm_colorop.h
index 0386440afe40..965db7ec488f 100644
--- a/include/drm/drm_colorop.h
+++ b/include/drm/drm_colorop.h
@@ -30,6 +30,11 @@
 #include <drm/drm_mode.h>
 #include <drm/drm_property.h>
 
+enum drm_colorop_curve_1d_type {
+	DRM_COLOROP_1D_CURVE_SRGB_EOTF,
+	DRM_COLOROP_1D_CURVE_SRGB_INV_EOTF
+};
+
 /**
  * struct drm_colorop_state - mutable colorop state
  */
@@ -39,6 +44,13 @@ struct drm_colorop_state {
 
 	/* colorop properties */
 
+	/**
+	 * @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;
 };
@@ -118,6 +130,14 @@ struct drm_colorop {
 	 * this color operation. The type is enum drm_colorop_type.
 	 */
 	struct drm_property *type_property;
+
+	/**
+	 * @curve_1d_type:
+	 *
+	 * 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)
-- 
2.42.1