drm/radeon/kms: vram sizing on certain r100 chips needs workaround.

If an rn50/r100/m6/m7 GPU has < 64MB RAM, i.e. 8/16/32, the
aperture used to calculate the MC_FB_LOCATION needs to be worked
out from the CONFIG_APER_SIZE register, and not the actual vram size.

TTM VRAM size was also being initialised wrong, use actual vram size
to initialise it.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
index f3469b96208..15c3531377e 100644
--- a/drivers/gpu/drm/radeon/radeon_ttm.c
+++ b/drivers/gpu/drm/radeon/radeon_ttm.c
@@ -454,7 +454,7 @@ int radeon_ttm_init(struct radeon_device *rdev)
                 return r;
         }
         r = ttm_bo_init_mm(&rdev->mman.bdev, TTM_PL_VRAM, 0,
-                           ((rdev->mc.aper_size) >> PAGE_SHIFT));
+                           ((rdev->mc.real_vram_size) >> PAGE_SHIFT));
         if (r) {
                 DRM_ERROR("Failed initializing VRAM heap.\n");
                 return r;
@@ -471,7 +471,7 @@ int radeon_ttm_init(struct radeon_device *rdev)
                 return r;
         }
         DRM_INFO("radeon: %uM of VRAM memory ready\n",
-                 rdev->mc.vram_size / (1024 * 1024));
+                 rdev->mc.real_vram_size / (1024 * 1024));
         r = ttm_bo_init_mm(&rdev->mman.bdev, TTM_PL_TT, 0,
                            ((rdev->mc.gtt_size) >> PAGE_SHIFT));
         if (r) {