gud
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notro
GUD USB Display
Hi thanks for your great work and contribution. can i use your USB display driver in order to drive ILI9163 FBTFT display panel connected to USB-To-SPI bridge (FT232H for example)...
``` $ sudo dmesg [ 0.000000] Linux version 5.15.0-27-generic (buildd@ubuntu) (gcc (Ubuntu 11.2.0-19ubuntu1) 11.2.0, GNU ld (GNU Binutils for Ubuntu) 2.38) #28-Ubuntu SMP Thu Apr 14 04:55:28 UTC 2022 (Ubuntu...
Unplugging and then plugging in the adapter does not work. The display comes up as black and backlit. But when rebooting the splash comes up. This was working on Ubuntu...
(Split out from #9) Importing buffers from Nvidia GPU does not work: ``` янв 21 20:04:49 Zenith kernel: microcode: microcode updated early to revision 0xea, date = 2021-01-05 янв 21...
> One more note, with usbip, the whole thing can be wireless. The host uses vhci-hcd and the device uses usbip-vudc, then it is IP world: you can go over...
``` drivers/usb/gadget/function/f_gud.c:865:21: warning: conversion from ‘long unsigned int’ to ‘u32’ {aka ‘unsigned int’} changes value fr om ‘18446744073709551615’ to ‘4294967295’ [-Woverflow] 865 | opts->connectors = ~0UL; | ^ ``` Cross...
The patchset available seems to only work on Linux versions up to 5.10, beyond that it fails to compile, seemingly related to some DRM changes that got made in 5.11....
Looks like BE is broken in the host driver (haven't been actually verified yet). https://lore.kernel.org/dri-devel/CAKb7UvihLX0hgBOP3VBG7O+atwZcUVCPVuBdfmDMpg0NjXe-cQ@mail.gmail.com/ v4l has some info about pixel formats and how it's stored in memory: https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/pixfmt-rgb.html
The gadget needs to take the GUD_REQ_SET_DISPLAY_ENABLE state into account when COMMITing state. It needs to set property crtc.ACTIVE=0 in gud_gadget_req_set_state_check() if not enabled. Failing test: https://github.com/notro/gud/blob/024402ba08a7534768000b78655c6c4b13240cdd/tests/test_properties.py#L18-L39
There is support for ROCK Pi 4a board in this repo, but since I have very limited time to spend on testing and maintenance, I haven't released an image.