This series adds display switching support for Apple laptops. The first two patches contain preparatory changes to vga_switcheroo, and the third contains the changes to support display switching with the gmux.
While these patches will allow switching the display mux, most Macbook owners will not be able to switch GPUs in practice until the graphics drivers are updated to deal with missing or incorrect vbios information on Apple machines. These patches do fix an issue seen by some users of Linux on Macbooks, however. These users will switch to the internal GPU in OS X and then reboot into Linux to save power, but after S3 the gmux gets reset to the discrete GPU. Adding the display mux support will fix this problem by restoring the gmux state during resume.
v2: Disable interrupts during suspend and re-enable them during resume to fix timeouts waiting for switching to complete after S3
Thanks, Seth
Andreas Heider (1): apple-gmux: Add display mux support
Seth Forshee (2): vga_switcheroo: Don't require handler init callback vga_switcheroo: Remove assumptions about registration/unregistration ordering
drivers/gpu/drm/nouveau/nouveau_acpi.c | 6 - drivers/gpu/vga/vga_switcheroo.c | 61 +++++---- drivers/platform/x86/apple-gmux.c | 224 ++++++++++++++++++++++++++++++++ 3 files changed, 262 insertions(+), 29 deletions(-)