Fix kvm show disconnected if host successively changes resolution

Video::resize() will throw execption if any ioctl failed and it leads
to rfb server stopped. This is the root cause because
VIDIOC_QUERY_DV_TIMINGS always could return error for no signal.

If VIDIOC_QUERY_DV_TIMINGS failed, we can go restart() to avoid this
problem.

Tested: manually tested with the host which changes resolution quickly
and successively.

Signed-off-by: Jammy Huang <jammy_huang@aspeedtech.com>
Change-Id: Ie613f177122b7058e19511a451e4dad9cb1dffbf
1 file changed
tree: 75c4dffb0bab23de84d536babcaf556ee4ad3a61
  1. create_usbhid.sh
  2. ikvm_args.cpp
  3. ikvm_args.hpp
  4. ikvm_input.cpp
  5. ikvm_input.hpp
  6. ikvm_manager.cpp
  7. ikvm_manager.hpp
  8. ikvm_server.cpp
  9. ikvm_server.hpp
  10. ikvm_video.cpp
  11. ikvm_video.hpp
  12. LICENSE
  13. MAINTAINERS
  14. meson.build
  15. obmc-ikvm.cpp
  16. OWNERS
  17. README.md
  18. scancodes.hpp
  19. start-ipkvm.service
README.md

OpenBMC IpKVM Server

The obmc-ikvm application is a VNC server that provides access to the host graphics output. The application interfaces with the video device on the BMC that captures the host graphics, and then serves that video data on the RFB (remote framebuffer, also known as VNC) protocol. The application also interfaces with the BMC USB gadget device to pass HID events from the BMC to the host, allowing the user to interact with the host system.

Usage

Once the host is running and an appropriate HID gadget device is instantiated on the BMC, the application can be started with the following command: obmc-ikvm -v <video device path> -i <HID gadget device path>

For example:

obmc-ikvm -v /dev/video0 -i /dev/hidg0