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drm/nouveau: Fix suspend on some nv4x AGP cards.

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On some nv4x cards (specifically, the ones that use an internal
PCIE->AGP bridge) the AGP controller state isn't preserved after a
suspend/resume cycle, and the AGP control registers have moved from
0x18xx to 0x100xx, so the FW check in nouveau_mem_reset_agp() doesn't
quite work. Check "dev->agp->mode" instead.

Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Francisco Jerez 2010-08-26 16:13:49 +02:00 committed by Ben Skeggs
parent 4a445f291a
commit 316f60a120
1 changed files with 2 additions and 1 deletions
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drivers/gpu/drm/nouveau/nouveau_mem.c
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@ -355,7 +355,8 @@ nouveau_mem_reset_agp(struct drm_device *dev)
/* First of all, disable fast writes, otherwise if it's
* already enabled in the AGP bridge and we disable the card's
* AGP controller we might be locking ourselves out of it. */
if (nv_rd32(dev, NV04_PBUS_PCI_NV_19) & PCI_AGP_COMMAND_FW) {
if ((nv_rd32(dev, NV04_PBUS_PCI_NV_19) |
dev->agp->mode) & PCI_AGP_COMMAND_FW) {
struct drm_agp_info info;
struct drm_agp_mode mode;