Add support for generic object properties IOCTLs

New library calls:
- drmModeObjectGetProperties
- drmModeFreeObjectProperties
- drmModeObjectSetProperties

Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-by: Rob Clark <rob@ti.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>

include/drm/drm.h

@@ -731,6 +731,8 @@ struct drm_prime_handle {
 #define DRM_IOCTL_MODE_GETPLANE	DRM_IOWR(0xB6, struct drm_mode_get_plane)
 #define DRM_IOCTL_MODE_SETPLANE	DRM_IOWR(0xB7, struct drm_mode_set_plane)
 #define DRM_IOCTL_MODE_ADDFB2		DRM_IOWR(0xB8, struct drm_mode_fb_cmd2)
+#define DRM_IOCTL_MODE_OBJ_GETPROPERTIES	DRM_IOWR(0xB9, struct drm_mode_obj_get_properties)
+#define DRM_IOCTL_MODE_OBJ_SETPROPERTY	DRM_IOWR(0xBA, struct drm_mode_obj_set_property)
 
 /**
  * Device specific ioctls should only be in their respective headers

include/drm/drm_mode.h

@@ -250,6 +250,30 @@ struct drm_mode_connector_set_property {
 	__u32 connector_id;
 };
 
+#define DRM_MODE_OBJECT_CRTC 0xcccccccc
+#define DRM_MODE_OBJECT_CONNECTOR 0xc0c0c0c0
+#define DRM_MODE_OBJECT_ENCODER 0xe0e0e0e0
+#define DRM_MODE_OBJECT_MODE 0xdededede
+#define DRM_MODE_OBJECT_PROPERTY 0xb0b0b0b0
+#define DRM_MODE_OBJECT_FB 0xfbfbfbfb
+#define DRM_MODE_OBJECT_BLOB 0xbbbbbbbb
+#define DRM_MODE_OBJECT_PLANE 0xeeeeeeee
+
+struct drm_mode_obj_get_properties {
+	__u64 props_ptr;
+	__u64 prop_values_ptr;
+	__u32 count_props;
+	__u32 obj_id;
+	__u32 obj_type;
+};
+
+struct drm_mode_obj_set_property {
+	__u64 value;
+	__u32 prop_id;
+	__u32 obj_id;
+	__u32 obj_type;
+};
+
 struct drm_mode_get_blob {
 	__u32 blob_id;
 	__u32 length;

xf86drmMode.c

@@ -974,3 +974,86 @@ void drmModeFreePlaneResources(drmModePlaneResPtr ptr)
 	drmFree(ptr->planes);
 	drmFree(ptr);
 }
+
+drmModeObjectPropertiesPtr drmModeObjectGetProperties(int fd,
+						      uint32_t object_id,
+						      uint32_t object_type)
+{
+	struct drm_mode_obj_get_properties properties;
+	drmModeObjectPropertiesPtr ret = NULL;
+	uint32_t count;
+
+retry:
+	memset(&properties, 0, sizeof(struct drm_mode_obj_get_properties));
+	properties.obj_id = object_id;
+	properties.obj_type = object_type;
+
+	if (drmIoctl(fd, DRM_IOCTL_MODE_OBJ_GETPROPERTIES, &properties))
+		return 0;
+
+	count = properties.count_props;
+
+	if (count) {
+		properties.props_ptr = VOID2U64(drmMalloc(count *
+							  sizeof(uint32_t)));
+		if (!properties.props_ptr)
+			goto err_allocs;
+		properties.prop_values_ptr = VOID2U64(drmMalloc(count *
+						      sizeof(uint64_t)));
+		if (!properties.prop_values_ptr)
+			goto err_allocs;
+	}
+
+	if (drmIoctl(fd, DRM_IOCTL_MODE_OBJ_GETPROPERTIES, &properties))
+		goto err_allocs;
+
+	if (count < properties.count_props) {
+		drmFree(U642VOID(properties.props_ptr));
+		drmFree(U642VOID(properties.prop_values_ptr));
+		goto retry;
+	}
+	count = properties.count_props;
+
+	ret = drmMalloc(sizeof(*ret));
+	if (!ret)
+		goto err_allocs;
+
+	ret->count_props = count;
+	ret->props = drmAllocCpy(U642VOID(properties.props_ptr),
+				 count, sizeof(uint32_t));
+	ret->prop_values = drmAllocCpy(U642VOID(properties.prop_values_ptr),
+				       count, sizeof(uint64_t));
+	if (ret->count_props && (!ret->props || !ret->prop_values)) {
+		drmFree(ret->props);
+		drmFree(ret->prop_values);
+		drmFree(ret);
+		ret = NULL;
+	}
+
+err_allocs:
+	drmFree(U642VOID(properties.props_ptr));
+	drmFree(U642VOID(properties.prop_values_ptr));
+	return ret;
+}
+
+void drmModeFreeObjectProperties(drmModeObjectPropertiesPtr ptr)
+{
+	if (!ptr)
+		return;
+	drmFree(ptr->props);
+	drmFree(ptr->prop_values);
+	drmFree(ptr);
+}
+
+int drmModeObjectSetProperty(int fd, uint32_t object_id, uint32_t object_type,
+			     uint32_t property_id, uint64_t value)
+{
+	struct drm_mode_obj_set_property prop;
+
+	prop.value = value;
+	prop.prop_id = property_id;
+	prop.obj_id = object_id;
+	prop.obj_type = object_type;
+
+	return DRM_IOCTL(fd, DRM_IOCTL_MODE_OBJ_SETPROPERTY, &prop);
+}

xf86drmMode.h

@@ -281,6 +281,12 @@ typedef struct _drmModeConnector {
 	uint32_t *encoders; /**< List of encoder ids */
 } drmModeConnector, *drmModeConnectorPtr;
 
+typedef struct _drmModeObjectProperties {
+	uint32_t count_props;
+	uint32_t *props;
+	uint64_t *prop_values;
+} drmModeObjectProperties, *drmModeObjectPropertiesPtr;
+
 typedef struct _drmModePlane {
 	uint32_t count_formats;
 	uint32_t *formats;
@@ -428,6 +434,14 @@ extern int drmModeSetPlane(int fd, uint32_t plane_id, uint32_t crtc_id,
 			   uint32_t src_x, uint32_t src_y,
 			   uint32_t src_w, uint32_t src_h);
 
+extern drmModeObjectPropertiesPtr drmModeObjectGetProperties(int fd,
+							uint32_t object_id,
+							uint32_t object_type);
+extern void drmModeFreeObjectProperties(drmModeObjectPropertiesPtr ptr);
+extern int drmModeObjectSetProperty(int fd, uint32_t object_id,
+				    uint32_t object_type, uint32_t property_id,
+				    uint64_t value);
+
 #if defined(__cplusplus) || defined(c_plusplus)
 }
 #endif