> -----Original Message----- > From: David Herrmann [mailto:dh.herrmann@xxxxxxxxx] > Sent: Friday, August 16, 2013 9:46 AM > To: Haiyang Zhang > Cc: linux-fbdev@xxxxxxxxxxxxxxx; driverdev-devel@xxxxxxxxxxxxxxxxxxxxxx; > Tomi Valkeinen; Jean-Christophe Plagniol-Villard; akpm@linux- > foundation.org; KY Srinivasan > Subject: Re: source code file for the generic vga driver? > > Hi > > On Mon, Aug 5, 2013 at 9:12 PM, Haiyang Zhang <haiyangz@xxxxxxxxxxxxx> > wrote: > > Hi folks, > > > > I'm working on an issue of HyperV synthetic frame buffer driver, which > > seems to have a conflict with the generic vga driver (not the vesa > > driver). I hope to read and trace into the source code for the generic vga > driver... > > > > Can anyone point me to the source code file for the generic vga driver in > the kernel tree? > > Everything lives in ./drivers/video/. The drivers you're probably interested in > are "vesafb.c" or "vga16fb.c". There is also the "vgacon" driver > in ./drivers/video/console/vgacon.c. I am not sure which one you are talking > about. > > You might also want to have a look at the x86 sysfb infrastructure which isn't > merged, yet: > http://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/log/?h=x86/fb > It provides proper platform-devices so drivers no longer conflict on the > vga/vesa/efi.. framebuffer resources. It's x86 only as all the relevant drivers > only work on x86. > > If you give some more information on what you are trying to do, I can point > you to the relevant resources. My guess is that you want to have a look at > remove_conflicting_framebuffers() in ./drivers/video/fbmem.c. Thank you for the detailed reply! I'm looking at a problem of Hyper-V synthetic fb driver (hyperv_fb) which seems to have conflict with some kind of generic video driver. I'm not sure which driver is this. On Suse, the vesafb is removed automatically by remove_conflicting_framebuffers() when hyperv_fb is loaded. We don't have any problem here. On some other Distros, like RHEL, CentOS, Ubuntu, the generic driver seems not to be vesafb -- I can't see any /dev/fb* there. And, the generic video driver seems not be removed when hyperv_fb is loaded. This generic video driver is not vesafb or vga16fb or vgacon, because it supports x-window GUI, and it's still here after I un-configured vesafb and vga16fb. Could point out what is the generic video driver used by RHEL, Ubuntu by default? And, how to let it exit automatically when our FB driver (hyperv_fb) is loaded? Thanks, - Haiyang _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
