Signed-off-by: Ilia Mirkin <imir...@alum.mit.edu>
---
Copied from the (disabled) overlay code in xf86-video-nouveau. I verified that
my nv34 indeed doesn't scale down by more than 2, didn't test the factor of 8.
drivers/gpu/drm/nouveau/dispnv04/overlay.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
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 @@ nv10_update_plane(struct drm_plane *plane, struct drm_crtc
*crtc,
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)
--
1.8.3.2
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