Kenneth Graunke <kenn...@whitecape.org> writes:

> drm-intel-next must have the new software checker turned on, which
> disallows non-whitelisted register writes (along with libva, so it
> can't really be enabled upstream yet).

For what it's worth, I get the EINVAL error even on the stock Fedora 20
kernel on Haswell (and presumably IvyBridge) so I can only assume the
software checker is already upstream, unless I'm misunderstanding
something.

$ uname -r
3.16.7-200.fc20.x86_64
$ modinfo i915 | grep cmd_parser
parm: enable_cmd_parser:Enable command parsing [...]
      (1=enabled [default], 0=disabled) (int)
$ sudo cat /sys/module/i915/parameters/enable_cmd_parser 
1

If I cat 0 to /sys/module/i915/parameters/enable_cmd_parser then I no
longer get the EINVAL error.

- Neil
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