On 08/31/2015 01:31 PM, Hans Verkuil wrote: > On 08/30/2015 05:06 AM, Mauro Carvalho Chehab wrote: >> As we'll be removing entity subtypes from the Kernel, we need >> to provide a way for drivers and core to check if a given >> entity is represented by a V4L2 subdev or if it is an V4L2 >> I/O entity (typically with DMA). > > This needs more discussion. The plan (as I understand it) is to have properties > that describe the entity's functionalities. > > The existing entity subtypes will exist only as backwards compat types, but in > the future properties should be used to describe the functionalities. > > This raises the question if we shouldn't use MEDIA_ENT_T_V4L2_SUBDEV to tell > userspace that this is a subdev-controlled entity, and let userspace look at > the properties to figure out what it is exactly? > > It could be that this is a transitional patch, and this will be fixed later. > If so, this should be mentioned in the commit message. FYI, I'm skipping patches that change the MEDIA_ENT_T_V4L2_SUBDEV usage until I understand the long-term plan for this define as discussed above. Regards, Hans -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
