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

[Christoph Hellwig <hch@xxxxxx>]

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;