[PATCH] drm/sun4i: Add DMA mask and segment size

[Jernej Skrabec]

Kernel occasionally complains that there is mismatch in segment size
when trying to render HW decoded videos and rendering them directly with
sun4i DRM driver.

Fix that by setting DMA mask and segment size.

Signed-off-by: Jernej Skrabec <jernej.skrabec at gmail.com>
---
 drivers/gpu/drm/sun4i/sun4i_drv.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c
index 275f7e4a03ae..83f4e87f77f6 100644
--- a/drivers/gpu/drm/sun4i/sun4i_drv.c
+++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
@@ -7,6 +7,7 @@
  */
 
 #include <linux/component.h>
+#include <linux/dma-mapping.h>
 #include <linux/kfifo.h>
 #include <linux/module.h>
 #include <linux/of_graph.h>
@@ -367,6 +368,9 @@ static int sun4i_drv_probe(struct platform_device *pdev)
 
 	INIT_KFIFO(list.fifo);
 
+	dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+	dma_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32));
+
 	for (i = 0;; i++) {
 		struct device_node *pipeline = of_parse_phandle(np,
 								"allwinner,pipelines",
-- 
2.36.1