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

H. Nikolaus Schaller hns at goldelico.com
Thu Aug 8 11:57:56 CEST 2019


Hi Christoph,

> Am 08.08.2019 um 09:24 schrieb Christoph Hellwig <hch at lst.de>:
> 
> 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;

Yes, it fixes the issue!

BR and thanks,
Nikolaus


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