drm/nouveau: add nv_mask register accessor

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.h b/drivers/gpu/drm/nouveau/nouveau_drv.h
index 11c0778..9d53f3d 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_drv.h
+++ b/drivers/gpu/drm/nouveau/nouveau_drv.h
@@ -1186,6 +1186,14 @@ static inline void nv_wr32(struct drm_device *dev, unsigned reg, u32 val)
        iowrite32_native(val, dev_priv->mmio + reg);
 }
 
+static inline void nv_mask(struct drm_device *dev, u32 reg, u32 mask, u32 val)
+{
+       u32 tmp = nv_rd32(dev, reg);
+       tmp &= ~mask;
+       tmp |= val;
+       nv_wr32(dev, reg, tmp);
+}
+
 static inline u8 nv_rd08(struct drm_device *dev, unsigned reg)
 {
        struct drm_nouveau_private *dev_priv = dev->dev_private;