[RFC PATCH 06/10] drm/colorop: Add NEXT property

[Harry Wentland]

We'll construct color pipelines out of drm_colorop by
chaining them via the NEXT pointer. NEXT will point to
the next drm_colorop in the pipeline, or by 0 if we're
at the end of the pipeline.

Signed-off-by: Harry Wentland <harry.wentland at amd.com>
Cc: Ville Syrjala <ville.syrjala at linux.intel.com>
Cc: Pekka Paalanen <pekka.paalanen at collabora.com>
Cc: Simon Ser <contact at emersion.fr>
Cc: Harry Wentland <harry.wentland at amd.com>
Cc: Melissa Wen <mwen at igalia.com>
Cc: Jonas Ådahl <jadahl at redhat.com>
Cc: Sebastian Wick <sebastian.wick at redhat.com>
Cc: Shashank Sharma <shashank.sharma at amd.com>
Cc: Alexander Goins <agoins at nvidia.com>
Cc: Joshua Ashton <joshua at froggi.es>
Cc: Michel Dänzer <mdaenzer at redhat.com>
Cc: Aleix Pol <aleixpol at kde.org>
Cc: Xaver Hugl <xaver.hugl at gmail.com>
Cc: Victoria Brekenfeld <victoria at system76.com>
Cc: Daniel Vetter <daniel at ffwll.ch>
Cc: Uma Shankar <uma.shankar at intel.com>
Cc: Naseer Ahmed <quic_naseer at quicinc.com>
Cc: Christopher Braga <quic_cbraga at quicinc.com>
---
 drivers/gpu/drm/drm_colorop.c | 27 +++++++++++++++++++++++++++
 include/drm/drm_colorop.h     | 12 ++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/drivers/gpu/drm/drm_colorop.c b/drivers/gpu/drm/drm_colorop.c
index 409df022b256..a92e170aed87 100644
--- a/drivers/gpu/drm/drm_colorop.c
+++ b/drivers/gpu/drm/drm_colorop.c
@@ -104,6 +104,15 @@ int drm_colorop_init(struct drm_device *dev, struct drm_colorop *colorop,
 				   colorop->curve_1d_type_property,
 				   0);
 
+	prop = drm_property_create_object(dev, DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_ATOMIC,
+			"NEXT", DRM_MODE_OBJECT_COLOROP);
+	if (!prop)
+		return -ENOMEM;
+	colorop->next_property = prop;
+	drm_object_attach_property(&colorop->base,
+				   colorop->next_property,
+				   0);
+
 	return ret;
 }
 EXPORT_SYMBOL(drm_colorop_init);
@@ -263,3 +272,21 @@ const char *drm_get_colorop_curve_1d_type_name(enum drm_colorop_curve_1d_type ty
 	return colorop_curve_1d_type_name[type];
 }
 
+
+/**
+ * drm_colorop_set_next_property - sets the next pointer
+ * @colorop: drm colorop
+ * @next: next colorop
+ *
+ * Should be used when constructing the color pipeline
+ */
+void drm_colorop_set_next_property(struct drm_colorop *colorop, struct drm_colorop *next)
+{
+	if (!colorop->next_property)
+		return;
+
+	drm_object_property_set_value(&colorop->base,
+				      colorop->next_property,
+				      next->base.id);
+}
+EXPORT_SYMBOL(drm_colorop_set_next_property);
diff --git a/include/drm/drm_colorop.h b/include/drm/drm_colorop.h
index 69636f6752a0..1ddd0e65fe36 100644
--- a/include/drm/drm_colorop.h
+++ b/include/drm/drm_colorop.h
@@ -162,10 +162,20 @@ struct drm_colorop {
 	 */
 	struct drm_property *curve_1d_type_property;
 
+	/**
+	 * @next_property
+	 *
+	 * Read-only property to next colorop in the pipeline
+	 */
+	struct drm_property *next_property;
+
 };
 
 #define obj_to_colorop(x) container_of(x, struct drm_colorop, base)
 
+
+
+
 /**
  * drm_crtc_find - look up a Colorop object from its ID
  * @dev: DRM device
@@ -212,5 +222,7 @@ static inline unsigned int drm_colorop_index(const struct drm_colorop *colorop)
 #define drm_for_each_colorop(colorop, dev) \
 	list_for_each_entry(colorop, &(dev)->mode_config.colorop_list, head)
 
+void drm_colorop_set_next_property(struct drm_colorop *colorop, struct drm_colorop *next);
+
 
 #endif /* __DRM_COLOROP_H__ */
-- 
2.42.0