drm/nv10/plane: add downscaling restrictions
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/dispnv04/overlay.c b/drivers/gpu/drm/nouveau/dispnv04/overlay.c
index 514a305..c14afb7 100644
--- a/drivers/gpu/drm/nouveau/dispnv04/overlay.c
+++ b/drivers/gpu/drm/nouveau/dispnv04/overlay.c
@@ -112,7 +112,15 @@
format = ALIGN(src_w * 4, 0x100);
if (format > 0xffff)
- return -EINVAL;
+ return -ERANGE;
+
+ if (dev->chipset >= 0x30) {
+ if (crtc_w < (src_w >> 1) || crtc_h < (src_h >> 1))
+ return -ERANGE;
+ } else {
+ if (crtc_w < (src_w >> 3) || crtc_h < (src_h >> 3))
+ return -ERANGE;
+ }
ret = nouveau_bo_pin(nv_fb->nvbo, TTM_PL_FLAG_VRAM);
if (ret)