drm/nv50/vram: fix incorrect detection of bank count on newer chipsets

NVA3+ has an extra bit here compared to NV50:NVA3 chipsets. Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
git-mirror · Nov 9, 2011 · 7b4b98f · 7b4b98f
1 parent dce411c
commit 7b4b98f
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/gpu/drm/nouveau/nv50_vram.c b/drivers/gpu/drm/nouveau/nv50_vram.c
@@ -160,7 +160,7 @@ nv50_vram_rblock(struct drm_device *dev)
 	colbits  =  (r4 & 0x0000f000) >> 12;
 	rowbitsa = ((r4 & 0x000f0000) >> 16) + 8;
 	rowbitsb = ((r4 & 0x00f00000) >> 20) + 8;
-	banks    = ((r4 & 0x01000000) ? 8 : 4);
+	banks    = 1 << (((r4 & 0x03000000) >> 24) + 2);
 
 	rowsize = parts * banks * (1 << colbits) * 8;
 	predicted = rowsize << rowbitsa;