On 09/07/2019 21:13, Vijay Kumar Banerjee wrote: > Hello all, > > First the status : > * The fbd has been ported and it's attaching with the fb0 devie. There's > an fb0 device entry created. > * In the following commit I have added mmap to libbsd. This works like a > wrapper to the mmap in cpukit > : > https://github.com/thelunatic/rtems-libbsd/commit/a8fc3b2b6840465029a000cc4169e9efbd551097 > > Blocker : > * After the fb0 is created and mmap is added, I don't see anything on > the screen. From the FreeBSD, it seemed like the VT driver is needed > and that is responsible for turning on the screen. So I have ported a > minimal version of the VT with only the initialization and allocate parts: > https://github.com/thelunatic/rtems-libbsd/commit/95279e116717973525b581ae2e9550d1d3b8e1ba > > But even after porting the VT driver which initializes well ( As the > message during booting says). I don't see anything on the screen. > I need some ideas on what is missing or how to debug this. > > The app I'm using to test framebuffer is pushed here : > https://github.com/thelunatic/rtems-bbb/tree/master/apps/fb-sample > > Any idea regarding this is greatly appreciated. > > Thanks, > Vijay >
Hello Vijay, did you have a look at the SPI of the HDMI framer? What is it used for according to the data sheet? Is it necessary for the driver? From our chat discussions and my own tests I know that the screen is still not receiving a signal. So I would assume some quite basic problem. If your new mmap wouldn't work, you should still get at least a black screen. Best regards Christian -- -------------------------------------------- embedded brains GmbH Herr Christian Mauderer Dornierstr. 4 D-82178 Puchheim Germany email: christian.maude...@embedded-brains.de Phone: +49-89-18 94 741 - 18 Fax: +49-89-18 94 741 - 08 PGP: Public key available on request. Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG. _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
