The src_w / src_h parameters to update_plane include a subpixel offset;
we need to shift off the subpixel bits before comparing to CRTC size
when checking for primary plane scaling.
Signed-off-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
---
drivers/gpu/drm/drm_plane_helper.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/drm_plane_helper.c b/drivers/gpu/drm/drm_plane_helper.c
index e768d35..9eca283 100644
--- a/drivers/gpu/drm/drm_plane_helper.c
+++ b/drivers/gpu/drm/drm_plane_helper.c
@@ -145,6 +145,8 @@ int drm_primary_helper_update(struct drm_plane *plane, struct drm_crtc *crtc,
}
/* Disallow scaling */
+ src_w >>= 16;
+ src_h >>= 16;
if (crtc_w != src_w || crtc_h != src_h) {
DRM_DEBUG_KMS("Can't scale primary plane\n");
return -EINVAL;
--
1.8.5.1
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