Francisco Jerez 190a43783f drm/nouveau: Don't clear AGPCMD completely on INIT_RESET. ...

We just need to clear the SBA and ENABLE bits to reset the AGP
controller: If the AGP bridge was configured to use "fast writes",
clearing the FW bit would break the subsequent MMIO writes and
eventually end with a lockup.

Note that all the BIOSes I've seen do the same as we did (it works for
them because they don't use MMIO), OTOH the blob leaves FW untouched.

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

2010-07-13 10:13:04 +10:00

..

drm

drm/nouveau: Don't clear AGPCMD completely on INIT_RESET.

2010-07-13 10:13:04 +10:00

vga

vgaarb: use MIT license

2010-06-03 13:13:34 +10:00

Makefile

PCI/GPU: implement VGA arbitration on Linux

2009-09-09 13:29:36 -07:00