Hi
This is my second revision of the dvbe driver. I renamed it to SimpleDRM to show the resemblence with the recently introduced simplefb.c fbdev driver. The driver is supposed to be the most basic DRM driver similar to efifb.c, vesafb.c, offb.c, simplefb.c, ... It provides a single virtual CRTC+encoder+connector and allows user-space to create one dumb-buffer at a time and attach it.
The setup changed slightly. It no longer uses shadow buffers but instead maps the framebuffer directly into userspace. Furthermore, a new infrastructure is used to unload firmware drivers during real hardware drivers probe cycles. Only nouveau was changed to use it, yet.
I still have an odd problem when unloading DRM drivers (not just SimpleDRM) with an fbdev fallback. If I call printk() directly after unregister_framebufer(), I get a NULL-deref somewhere in the VT layer (most times hide_cursor()). I haven't figured out exactly where that happens, but I am also very reluctant to spend more time debugging the VT layer.
Anyhow, comments welcome. If someone wants to test it, you probably need to add a line to ./include/linux/platform_data/simplefb.h and add the modeline of your VESA/EFI framebuffer.
Cheers David
David Herrmann (6): fbdev: simplefb: add init through platform_data x86: provide platform-devices for boot-framebuffers drm: add SimpleDRM driver drm: simpledrm: add fbdev fallback support drm: add helpers to kick out firmware drivers drm: nouveau: kick out firmware drivers during probe
MAINTAINERS | 8 + arch/x86/Kconfig | 18 ++ arch/x86/kernel/Makefile | 1 + arch/x86/kernel/sysfb.c | 157 ++++++++++++ drivers/gpu/drm/Kconfig | 2 + drivers/gpu/drm/Makefile | 1 + drivers/gpu/drm/drm_pci.c | 1 + drivers/gpu/drm/drm_platform.c | 1 + drivers/gpu/drm/drm_stub.c | 107 ++++++++ drivers/gpu/drm/drm_usb.c | 1 + drivers/gpu/drm/nouveau/nouveau_drm.c | 29 ++- drivers/gpu/drm/simpledrm/Kconfig | 29 +++ drivers/gpu/drm/simpledrm/Makefile | 9 + drivers/gpu/drm/simpledrm/simpledrm.h | 114 +++++++++ drivers/gpu/drm/simpledrm/simpledrm_drv.c | 231 ++++++++++++++++++ drivers/gpu/drm/simpledrm/simpledrm_fbdev.c | 180 ++++++++++++++ drivers/gpu/drm/simpledrm/simpledrm_main.c | 366 ++++++++++++++++++++++++++++ drivers/gpu/drm/simpledrm/simpledrm_mem.c | 254 +++++++++++++++++++ drivers/video/Kconfig | 5 +- drivers/video/simplefb.c | 45 +++- include/drm/drmP.h | 26 ++ include/linux/platform_data/simplefb.h | 40 +++ 22 files changed, 1604 insertions(+), 21 deletions(-) create mode 100644 arch/x86/kernel/sysfb.c create mode 100644 drivers/gpu/drm/simpledrm/Kconfig create mode 100644 drivers/gpu/drm/simpledrm/Makefile create mode 100644 drivers/gpu/drm/simpledrm/simpledrm.h create mode 100644 drivers/gpu/drm/simpledrm/simpledrm_drv.c create mode 100644 drivers/gpu/drm/simpledrm/simpledrm_fbdev.c create mode 100644 drivers/gpu/drm/simpledrm/simpledrm_main.c create mode 100644 drivers/gpu/drm/simpledrm/simpledrm_mem.c create mode 100644 include/linux/platform_data/simplefb.h