Hello,
We always use some kind of hack work to make our Video Process
Unit(Multi-format Video Encoder/Decoder) work in kernel. From a
customize driver(vpu service) to the customize V4L2 driver. The V4L2
subsystem is really not suitable for the stateless Video process or it
could make driver too fat.
After talking to some kindness Intel guys and moving our userspace
library to VA-API driver, I find the DRM may the good choice for us.
But I don't know whether it is welcome to to submit a video driver in
DRM subsystem?
Also our VPU(Video process unit) is not just like the Intel's, we
don't have VCS, we based on registers to set the encoder/decoder. I
think we may need a lots of IOCTL then. Also we do have a IOMMU in VPU
but also not a isolated memory for VPU, I don't know I should use TT
memory or GEM memory.
I am actually not a member of the department in charge of VPU, and I
am just beginning to learning DRM(thank the help from Intel again), I am
not so good at memory part as well(I am more familiar with CMA not the
IOMMU way), I may need know guide about the implementations when I am
going to submit driver, I hope I could get help from someone.
--
Randy Li
The third produce department
_______________________________________________
dri-devel mailing list
dri-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/dri-devel
