I'm trying to add support for VGA arbitration on newer Intel graphics
devices. The existing code attempts to do this, but appear to have
not been updated since GMCH devices roamed the Earth. On newer
devices like Haswell, we can disable VGA memory through an MSR on the
device, but we rely on the VGA arbiter to manage VGA IO using the PCI
COMMAND register. In trying to unregister legacy VGA memory, I found
that the VGA arbiter still wanted to disable both memory and IO on
the device and that it forgot to actually program the device to
disable IO when the decoding is updated. This series attempts to fix
both of those. Thanks,
Alex
---
Alex Williamson (2):
vgaarb: Don't disable resources that are not owned
vgaarb: Fix VGA decodes changes
drivers/gpu/vga/vgaarb.c | 50 ++++++++++++++++++++--------------------------
1 file changed, 22 insertions(+), 28 deletions(-)
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