JiUn Yu wrote:
5. Mixer & Video Processor driver. It is called 's5p-mixer' because of historical reasons. It was decided combine VP and MXR drivers into one because of shared interrupt and very similar interface via V4L2 nodes. The driver is a realization of many-to-many relation between multiple input layers and multiple outputs. All shared resources are kept in struct mxr_device. It provides utilities for management and synchronization of access to resources and reference counting. The outputs are obtained from HDMI/SDO private data. One layer is a single video node. Simple inheritance is applied because there only little difference between layer's types. Every layer type implements set of ops. There are different ops for Mixer layers and other for VP layer.I agreed with subdev of hdmi, hdmiphy, sdo and videoDAC. It is very flexible in case of adding new interface or removing current interface. But 's5p-mixer' driver is not flexible. So, If new scaler is added instead of VP or mixer is someting changed, I think current architecture of tvout driver can't support. How about separating vp and mixer driver?
Hi Yu,The designed architecture TV driver was not prepared for removal of VP, or MIxer input nodes. I decided only to allow flexible outputs because I knew 2 boards with different output configuration (Goni - only SDO, Universal - HDMI and SDO). I need more information about VP substitute before changing design of the whole driver. Some of extensions could be applied by adding extra layer type to existing layer_vp and layer_grp ones.
Best regards Tomasz Stanislawski
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