Hi
Another round of SimpleDRM patches. I somehow lost track of the last ones and as this is a major rewrite, I'll just start at v1 again.
Some comments up-front:
- @Ingo: Patch #1 and #2 are unchanged from the previous ML discussions. I included them in this series as the other patches depend on them. Could you pick them up for the x86 tree? The other 9 patches won't make it in 3.14 so no reason to put them through the DRM tree. All mentioned issues should be addressed. If there's still sth missing, please let me know.
- The DRM patches depend on my "DRM Anonymous Inode" patches. But it should be trivial to apply them on drm-next (I think only one line needs to be changed: i_mapping => dev_mapping).
- I tested the SimpleDRM fbdev fallback with linux-console+Xorg and it works fine. The DRM backend is only tested with some DRM tests I have locally. I have no idea how to make Xorg pick up a specific /dev/dri/card0 card. It always tells me "no screens found" (as the underlying device is not marked as boot_vga..). If someone knows how to tell Xorg to use card0, I'd gladly test this. But I'm no longer used to writing xorg.confs..
This series introduces two new concepts: sysfb and SimpleDRM Sysfb is just a generalization of the x86-sysfb concept. It allows to register firmware-framebuffers with the system as platform-devices. This way, drivers can properly bind to these devices and we prevent multiple drivers from accessing the same firmware-framebuffer. Sysfb also provides hooks to get a safe handover to real hw-drivers (like i915). Please see the "video: sysfb: add generic firmware-fb interface" patch for a thorough description of the API. This patch also adds a rather verbose documentation of all known firmware-fb facilities.
As second part, this series introduces SimpleDRM. It's a very basic DRM driver that can replace efifb, vesafb, simplefb and friends. It's 100% compatible to the "udl" DRM driver, so user-space like xf86-video-modesetting can pick them up just fine. User-space that cannot deal with drmModeDirtyFB() (like weston and friends) currently cannot use SimpleDRM. However, that's also true for all other DRM drivers which provide shadow framebuffers. We could provide something like FB-DEFIO, but that's just useless overhead to paper of lazy user-space.
I have tested this with all hardware that I have at home, with a lot hand-over combinations (with/without SYSFB, with efifb/vesafb/simplefb, with SimpleDRM, ...) and all worked great so far.
Comments welcome! David
David Herrmann (11): x86: sysfb: fool-proof CONFIG_X86_SYSFB x86: sysfb: remove sysfb when probing real hw fbdev: efifb: add dev->remove() callback fbdev: vesafb: add dev->remove() callback x86: sysfb: store apertures in simplefb platform-data video: sysfb: add generic firmware-fb interface drm: mgag200: remove redundant fbdev removal drm/i915: remove sysfbs early drm: add SimpleDRM driver drm: simpledrm: add fbdev fallback support x86/sysfb: allow sysfb+simpledrm combination
Documentation/firmware-fbs.txt | 236 +++++++++++++++++ MAINTAINERS | 8 + arch/x86/Kconfig | 2 + arch/x86/include/asm/sysfb.h | 6 +- arch/x86/kernel/sysfb.c | 3 +- arch/x86/kernel/sysfb_simplefb.c | 97 ++++--- drivers/gpu/drm/Kconfig | 2 + drivers/gpu/drm/Makefile | 1 + drivers/gpu/drm/i915/i915_drv.c | 6 + drivers/gpu/drm/mgag200/mgag200_main.c | 9 - drivers/gpu/drm/simpledrm/Kconfig | 29 +++ drivers/gpu/drm/simpledrm/Makefile | 4 + drivers/gpu/drm/simpledrm/simpledrm.c | 263 +++++++++++++++++++ drivers/gpu/drm/simpledrm/simpledrm.h | 122 +++++++++ drivers/gpu/drm/simpledrm/simpledrm_damage.c | 306 ++++++++++++++++++++++ drivers/gpu/drm/simpledrm/simpledrm_fbdev.c | 148 +++++++++++ drivers/gpu/drm/simpledrm/simpledrm_gem.c | 282 +++++++++++++++++++++ drivers/gpu/drm/simpledrm/simpledrm_kms.c | 365 +++++++++++++++++++++++++++ drivers/video/Kconfig | 3 + drivers/video/Makefile | 1 + drivers/video/efifb.c | 13 +- drivers/video/fbmem.c | 17 +- drivers/video/simplefb.c | 8 - drivers/video/sysfb.c | 348 +++++++++++++++++++++++++ drivers/video/vesafb.c | 13 +- include/linux/fb.h | 9 +- include/linux/platform_data/simplefb.h | 2 + include/linux/sysfb.h | 62 +++++ 28 files changed, 2299 insertions(+), 66 deletions(-) create mode 100644 Documentation/firmware-fbs.txt create mode 100644 drivers/gpu/drm/simpledrm/Kconfig create mode 100644 drivers/gpu/drm/simpledrm/Makefile create mode 100644 drivers/gpu/drm/simpledrm/simpledrm.c create mode 100644 drivers/gpu/drm/simpledrm/simpledrm.h create mode 100644 drivers/gpu/drm/simpledrm/simpledrm_damage.c create mode 100644 drivers/gpu/drm/simpledrm/simpledrm_fbdev.c create mode 100644 drivers/gpu/drm/simpledrm/simpledrm_gem.c create mode 100644 drivers/gpu/drm/simpledrm/simpledrm_kms.c create mode 100644 drivers/video/sysfb.c create mode 100644 include/linux/sysfb.h