Re: [Bug] v5.3-rc3: arm: omap5: omapdss: omap_fbdev_init fails with lpae config and reports dma_mask error

[Christoph Hellwig]

Hi Nikolaus,

please try the patch below:

diff --git a/drivers/gpu/drm/omapdrm/omap_fbdev.c 
b/drivers/gpu/drm/omapdrm/omap_fbdev.c
index 561c4812545b..2c8abf07e617 100644
--- a/drivers/gpu/drm/omapdrm/omap_fbdev.c
+++ b/drivers/gpu/drm/omapdrm/omap_fbdev.c
@@ -232,6 +232,8 @@ void omap_fbdev_init(struct drm_device *dev)
        if (!priv->num_pipes)
                return;
 
+       dma_coerce_mask_and_coherent(dev->dev, DMA_BIT_MASK(32));
+
        fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
        if (!fbdev)
                goto fail;