Hi This is version 2 of the fblog driver. The fblog driver allows showing the kernel console on all available framebuffers. It's a replacement for CONFIG_VT and fbcon that is much, much smaller and simpler. It should be used for debugging purposes only, therefore, it is currently not optimized for speed. Three patches extract update_attr(), bit_putcs() and get/put_fb_info() so they can be used from fblog, the other patches actually implement fblog. Version 2 addresses the issues from the last series. I extracted bit_putcs() into fbdraw_font() so we have a single function shared between fbcon and fblog to draw text. Furthermore, I reworked the framebuffer-registration logic inside of fblog so there shouldn't be any more races with fbmem.c fb registration. There is also a new configuration parameter that allows enabling fblog only on specific framebuffers as requested from several people. I also redid the whole patch-split so it should be much easier to follow. I am using this driver on my x86_64 machine without any problems. If you remove the "!VT" line in Kconfig then this can even be used with VTs enabled (even though this is kind of racy between fbcon and fblog, obviously). Unloading the module still has to be done with "rmmod -f fblog" as we still have a reference to our own module. I haven't found a way to avoid this. The reason why I wrote this driver is to make CONFIG_VT obsolete. This way I can drop a lot of code from the kernel and make it much smaller. In combination with user-space terminals like "kmscon" there is actually no need for in-kernel terminals anymore. This patchset is built based on linux-next as I have no idea whose tree this is going through. Feedback is appreciated. Regards David David Herrmann (11): fbcon: move update_attr() into separate source file fbcon: move bit_putcs() into separate source file fblog: new framebuffer kernel log dummy driver fbdev: export get_fb_info()/put_fb_info() fblog: register one fblog object per framebuffer fblog: open fb on registration fblog: allow selecting fbs via sysfs fblog: cache framebuffer BLANK and SUSPEND states fblog: register console driver fblog: draw console to framebuffers MAINTAINERS: add fblog entry MAINTAINERS | 6 + drivers/video/Kconfig | 5 +- drivers/video/Makefile | 2 +- drivers/video/console/Kconfig | 37 ++- drivers/video/console/Makefile | 4 +- drivers/video/console/bitblit.c | 149 +-------- drivers/video/console/fbcon.h | 5 +- drivers/video/console/fbdraw.c | 171 +++++++++++ drivers/video/console/fbdraw.h | 30 ++ drivers/video/console/fblog.c | 665 ++++++++++++++++++++++++++++++++++++++++ drivers/video/fbmem.c | 6 +- include/linux/fb.h | 3 + 12 files changed, 925 insertions(+), 158 deletions(-) create mode 100644 drivers/video/console/fbdraw.c create mode 100644 drivers/video/console/fbdraw.h create mode 100644 drivers/video/console/fblog.c -- 1.7.11.1 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
