summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/nouveau/nouveau_chan.c
diff options
context:
space:
mode:
authorPierre Moreau <pierre.morrow@free.fr>2015-10-03 21:35:16 +0200
committerBen Skeggs <bskeggs@redhat.com>2015-11-03 15:02:18 +1000
commit5d5b43f59bd214506265ea05a013229ff5291101 (patch)
tree48fc6b851325191454ab5404af6608e61aa3898f /drivers/gpu/drm/nouveau/nouveau_chan.c
parent354a22496613366833edfe29300a6bfe6482255c (diff)
downloadblackbird-op-linux-5d5b43f59bd214506265ea05a013229ff5291101.tar.gz
blackbird-op-linux-5d5b43f59bd214506265ea05a013229ff5291101.zip
drm/nouveau/pci: Handle 5-bit and 8-bit tag field
If the hardware supports extended tag field (8-bit ones), then enable it. This is usually done by the VBIOS, but not on some MBPs (see fdo#86537). In case extended tag field is not supported, 5-bit tag field is used which limits the possible number of requests to 32. Apparently bits 7:0 of 0x08841c stores some number of outstanding requests, so cap it to 32 if extended tag is unsupported. Fixes: fdo#86537 v2: Restrict changes to chipsets >= 0x84 v3: * Add nvkm_pci_mask to pci.h * Mask bit 8 before setting it v4: * Rename `add` argument of nvkm_pci_mask to `value` * Move code from nvkm_pci_init to g84_pci_init and remove PCIe and chipset checks v5: * Rebase code on latest PCI structure * Restore PCIe check * Fix namings in nvkm_pci_mask * Rephrase part of the commit message Signed-off-by: Pierre Moreau <pierre.morrow@free.fr> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_chan.c')
0 files changed, 0 insertions, 0 deletions
OpenPOWER on IntegriCloud