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>
diff --git a/drivers/gpu/drm/nouveau/nv50_vram.c b/drivers/gpu/drm/nouveau/nv50_vram.c
index 9da2383..2e45e57 100644
--- a/drivers/gpu/drm/nouveau/nv50_vram.c
+++ b/drivers/gpu/drm/nouveau/nv50_vram.c
@@ -160,7 +160,7 @@
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;