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

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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>

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Francisco Jerez 2010-06-17 12:42:14 +02:00 • committed by Ben Skeggs

parent 2fa67f12e7

commit 190a43783f

1 changed files with 2 additions and 1 deletions

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drivers/gpu/drm/nouveau/nouveau_bios.c

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