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drm/radeon: force dma32 to fix regression rs4xx,rs6xx,rs740 

It seems some of those IGP dislike non dma32 page despite what
documentation says. Fix regression since we allowed non dma32
pages. It seems it only affect some revision of those IGP chips
as we don't know which one just force dma32 for all of them.

https://bugzilla.redhat.com/show_bug.cgi?id=785375

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jerome Glisse 2012-08-28 16:50:22 -04:00 committed by Alex Deucher
parent 0ceb996c9e
commit 4a2b6662c3
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/radeon/radeon_device.c
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@ -1051,7 +1051,7 @@ int radeon_device_init(struct radeon_device *rdev,
if (rdev->flags & RADEON_IS_AGP)
rdev->need_dma32 = true;
if ((rdev->flags & RADEON_IS_PCI) &&
(rdev->family < CHIP_RS400))
(rdev->family <= CHIP_RS740))
rdev->need_dma32 = true;
dma_bits = rdev->need_dma32 ? 32 : 40;