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drm/radeon/kms: Disable AGP is aperture size < 32M

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radeon KMS need a GART of at least 32M to properly work. This patch
check the AGP aperture size and disable if it's less than 32M. Note
than unlike non KMS path we don't staticaly allocate AGP memory so
we are not wasting memory not used by graphic processing.

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Jerome Glisse 2010-01-13 15:16:39 +01:00 committed by Dave Airlie
parent 30d2d9a54d
commit 0a3f316370
1 changed files with 7 additions and 0 deletions
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7
drivers/gpu/drm/radeon/radeon_agp.c
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@ -133,6 +133,13 @@ int radeon_agp_init(struct radeon_device *rdev)
bool is_v3;
int ret;
if (rdev->ddev->agp->agp_info.aper_size < 32) {
dev_warn(rdev->dev, "AGP aperture to small (%dM) "
"need at least 32M, disabling AGP\n",
rdev->ddev->agp->agp_info.aper_size);
return -EINVAL;
}
/* Acquire AGP. */
if (!rdev->ddev->agp->acquired) {
ret = drm_agp_acquire(rdev->ddev);