drm/radeon/kms/r600: clamp vram to aperture size
r6xx and r7xx was missing this. We don't support
non-CPU accessible vram yet.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c
index b574c73..efca509 100644
--- a/drivers/gpu/drm/radeon/rv770.c
+++ b/drivers/gpu/drm/radeon/rv770.c
@@ -801,6 +801,13 @@
/* Setup GPU memory space */
rdev->mc.mc_vram_size = RREG32(CONFIG_MEMSIZE);
rdev->mc.real_vram_size = RREG32(CONFIG_MEMSIZE);
+
+ if (rdev->mc.mc_vram_size > rdev->mc.aper_size)
+ rdev->mc.mc_vram_size = rdev->mc.aper_size;
+
+ if (rdev->mc.real_vram_size > rdev->mc.aper_size)
+ rdev->mc.real_vram_size = rdev->mc.aper_size;
+
if (rdev->flags & RADEON_IS_AGP) {
r = radeon_agp_init(rdev);
if (r)