drm: add extended property types

If we continue to use bitmask for type, we will quickly run out of room
to add new types.  Split this up so existing part of bitmask range
continues to function as before, but reserve a chunk of the remaining
space for an integer type-id.  Wrap this all up in some type-check
helpers to keep the backwards-compat uglyness contained.

Signed-off-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>

2 files changed, 30 insertions, 0 deletions

diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 90bd1a25e2c6..92f6ec2de86a 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -930,6 +930,23 @@ extern void drm_mode_config_cleanup(struct drm_device *dev);
 
 extern int drm_mode_connector_update_edid_property(struct drm_connector *connector,
                                                 struct edid *edid);
+
+static inline bool drm_property_type_is(struct drm_property *property,
+                uint32_t type)
+{
+        /* instanceof for props.. handles extended type vs original types: */
+        if (property->flags & DRM_MODE_PROP_EXTENDED_TYPE)
+                return (property->flags & DRM_MODE_PROP_EXTENDED_TYPE) == type;
+        return property->flags & type;
+}
+
+static inline bool drm_property_type_valid(struct drm_property *property)
+{
+        if (property->flags & DRM_MODE_PROP_EXTENDED_TYPE)
+                return !(property->flags & DRM_MODE_PROP_LEGACY_TYPE);
+        return !!(property->flags & DRM_MODE_PROP_LEGACY_TYPE);
+}
+
 extern int drm_object_property_set_value(struct drm_mode_object *obj,
                                          struct drm_property *property,
                                          uint64_t val);
diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index 719add464f95..caeaa6f7ebde 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -252,6 +252,19 @@ struct drm_mode_get_connector {
 #define DRM_MODE_PROP_BLOB      (1<<4)
 #define DRM_MODE_PROP_BITMASK   (1<<5) /* bitmask of enumerated types */
 
+/* non-extended types: legacy bitmask, one bit per type: */
+#define DRM_MODE_PROP_LEGACY_TYPE  ( \
+                DRM_MODE_PROP_RANGE | \
+                DRM_MODE_PROP_ENUM | \
+                DRM_MODE_PROP_BLOB | \
+                DRM_MODE_PROP_BITMASK)
+
+/* extended-types: rather than continue to consume a bit per type,
+ * grab a chunk of the bits to use as integer type id.
+ */
+#define DRM_MODE_PROP_EXTENDED_TYPE     0x0000ffc0
+#define DRM_MODE_PROP_TYPE(n)           ((n) << 6)
+
 struct drm_mode_property_enum {
         __u64 value;
         char name[DRM_PROP_NAME_LEN];