diff options
| author | Francisco Jerez <currojerez@riseup.net> | 2010-06-17 12:42:14 +0200 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2010-07-13 10:13:04 +1000 |
| commit | 190a43783f2c43186180c827444d4eac901b4bcf (patch) | |
| tree | 9eb197e45a1991e891c5d56e8b938c515d0a3787 /drivers/gpu/drm/nouveau | |
| parent | 2fa67f12e71d7f8adade7c4e6bb839156dea2365 (diff) | |
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>
Diffstat (limited to 'drivers/gpu/drm/nouveau')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_bios.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.c b/drivers/gpu/drm/nouveau/nouveau_bios.c index fc924b649195..9ab0c83fe9be 100644 --- a/drivers/gpu/drm/nouveau/nouveau_bios.c +++ b/drivers/gpu/drm/nouveau/nouveau_bios.c @@ -2146,7 +2146,8 @@ init_reset(struct nvbios *bios, uint16_t offset, struct init_exec *iexec) /* no iexec->execute check by design */ pci_nv_19 = bios_rd32(bios, NV_PBUS_PCI_NV_19); - bios_wr32(bios, NV_PBUS_PCI_NV_19, 0); + bios_wr32(bios, NV_PBUS_PCI_NV_19, pci_nv_19 & ~0xf00); + bios_wr32(bios, reg, value1); udelay(10); |