2.6.35 and 2.6.36 do not contain blit support for evergreen asics so if they use unmappable vram, you can end up with an unreachable buffer address. This should not be applied to drm-next as that tree already contains evergreen blit support. This should only be applied to the 2.6.35 and 2.6.36 stable trees.
Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=30188
Signed-off-by: Alex Deucher alexdeucher@gmail.com Cc: stable@kernel.org --- drivers/gpu/drm/radeon/evergreen.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c index 2117cf5..f8c0f15 100644 --- a/drivers/gpu/drm/radeon/evergreen.c +++ b/drivers/gpu/drm/radeon/evergreen.c @@ -1480,6 +1480,8 @@ int evergreen_mc_init(struct radeon_device *rdev) rdev->mc.mc_vram_size = RREG32(CONFIG_MEMSIZE) * 1024 * 1024; rdev->mc.real_vram_size = RREG32(CONFIG_MEMSIZE) * 1024 * 1024; rdev->mc.visible_vram_size = rdev->mc.aper_size; + /* limit it to the aperture size for now as there is no blit support in 2.6.35/36*/ + rdev->mc.real_vram_size = rdev->mc.visible_vram_size; r600_vram_gtt_location(rdev, &rdev->mc); radeon_update_bandwidth_info(rdev);