AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-11-30 14:06:51 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

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

Browse Source 
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>
This commit is contained in:
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/gpu/drm/nouveau/nouveau_bios.c
View File

@ -2146,7 +2146,8 @@ init_reset(struct nvbios *bios, uint16_t offset, struct init_exec *iexec)
/* no iexec->execute check by design */ /* no iexec->execute check by design */
pci_nv_19 = bios_rd32(bios, NV_PBUS_PCI_NV_19); 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); bios_wr32(bios, reg, value1);
udelay(10); udelay(10);