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>
diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 63a3fe3..045b33b 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -332,8 +332,11 @@
unsigned gtt_location;
unsigned gtt_size;
unsigned vram_location;
- unsigned vram_size;
+ /* for some chips with <= 32MB we need to lie
+ * about vram size near mc fb location */
+ unsigned mc_vram_size;
unsigned vram_width;
+ unsigned real_vram_size;
int vram_mtrr;
bool vram_is_ddr;
};