Hi Dmitry, On 2/18/20 9:27 PM, Dmitry Sepp wrote: > Hi all, > > This is a v4l2 virtio video driver for the virtio-video device > specification v3 [1]. > > The first version of the driver was introduced here [2]. > > Changes v1 -> v2: > * support the v3 spec (mostly) > * add a module parameter to ask for pages from ZONE_DMA > > What is not implemented: > * Plane layout flags should be used to propagate number of planes to > user-space > * There is no real use of stream creation with bitstream format in the > parameter list. The driver just uses the first bitstream format from > the list. > * Setting bitrate is done in a different way compared to the spec. This > is because it has been already agreed on that the way the spec > currently describes it requires changes. > > Potential improvements: > * Do not send stream_create from open. Use corresponding state machine > condition to do this. > * Do not send stream_destroy from close. Do it in reqbufs(0). > * Cache format and control settings. Reduce calls to the device. Some general notes: Before this can be merged it needs to pass v4l2-compliance. I also strongly recommend adding support for V4L2_PIX_FMT_FWHT to allow testing with the vicodec emulation driver. This will also allow testing all sorts of corner cases without requiring special hardware. Regards, Hans > > Best regards, > Dmitry. > > [1] https://markmail.org/message/dmw3pr4fuajvarth > [2] https://markmail.org/message/wnnv6r6myvgb5at6 > >
