This patch set:
- splits the default display handling out from VGA arbiter, into its own file and behind its own Kconfig option (and gives the functions better names).
- adds extra detection of default devices. To be nominated, the vga arbiter and platform hooks must not have nominated a default. A card will then only be nominated if it has a driver attached and has IO or memory decoding enabled.
- adds relevant documentation.
The practical impact of this is improved X autoconfiguration on some arm64 systems.
Changes in v3:
- Add documentation - thanks Daniel Vetter for pointing it out.
- Clarify explanations. Thanks to everyone for continuing to bear with my incomplete understanding of PCI and provide some clarity.
- Split refactoring and adding functionality.
Changes in v2: https://www.spinics.net/lists/linux-pci/msg64007.html
Drop all the powerpc patches. [explanation snipped]
v1: https://www.spinics.net/lists/linux-pci/msg63581.html
Regards, Daniel
Daniel Axtens (3): drm: split default display handler out of VGA arbiter drm: add fallback default device detection drm: documentation for default display device
Documentation/gpu/default_display.rst | 93 +++++++++++++++++++ Documentation/gpu/index.rst | 1 + arch/ia64/pci/fixup.c | 6 +- arch/powerpc/kernel/pci-common.c | 6 +- arch/x86/pci/fixup.c | 6 +- arch/x86/video/fbdev.c | 4 +- drivers/gpu/vga/Kconfig | 12 +++ drivers/gpu/vga/Makefile | 1 + drivers/gpu/vga/default_display.c | 163 ++++++++++++++++++++++++++++++++++ drivers/gpu/vga/vga_switcheroo.c | 8 +- drivers/gpu/vga/vgaarb.c | 61 +++---------- drivers/pci/pci-sysfs.c | 4 +- include/linux/default_display.h | 44 +++++++++ include/linux/vgaarb.h | 15 ---- 14 files changed, 344 insertions(+), 80 deletions(-) create mode 100644 Documentation/gpu/default_display.rst create mode 100644 drivers/gpu/vga/default_display.c create mode 100644 include/linux/default_display.h