On Thu, 27 Aug 2009, Hans Verkuil wrote: > For example a sensor connected to an fpga (doing e.g. color space > conversion or some other type of image processing/image improvement) which > in turn is connected to the bridge. > > How you setup the sensor and how you setup the bridge might not have an > obvious 1-to-1 mapping. While I have not seen setups like this for > sensors, I have seen them for video encoder devices. > > You assume that a sensor is connected directly to a bridge, but that > assumption is simply not true. There may be all sorts of ICs in between. No, I do not assume that, that's why in my original RFC I used "source" and "sink" instead of camera and SoC. In your example you your FPGA is a subdev to the SoC, and the sensor is a subdev to FPGA, right? So, what stops you from applying my format enumeration twice? Say, first the FPGA enumerates sensor formats and synthesises a list of output formats - again, as "source" formats, not "user" formats, because the data is going to be transferred to the host over the image bus, right? It would be a different configuration if you first transfer the data from FPGA to RAM and then let your SoC camera host take the data from there. That would be a different configuration for the host. So, I don't see how your example requires platform data. Thanks Guennadi --- Guennadi Liakhovetski, Ph.D. Freelance Open-Source Software Developer http://www.open-technology.de/ -- 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
