[PATCH 2/2] drm/tegra: Set the DMA mask
Alexandre Courbot
acourbot at nvidia.com
Tue Feb 23 06:25:54 UTC 2016
The default DMA mask covers a 32 bits address range, but tegradrm can
address more than that. Set the DMA mask to the actual addressable range
to avoid the use of unneeded bounce buffers.
Signed-off-by: Alexandre Courbot <acourbot at nvidia.com>
---
Thierry, I am not absolutely sure whether the size is correct and applies
to all Tegra generations - please let me know if this needs to be
reworked.
drivers/gpu/drm/tegra/drm.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
index bc0555adecaf..503fc9e73521 100644
--- a/drivers/gpu/drm/tegra/drm.c
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -992,6 +992,7 @@ static int host1x_drm_probe(struct host1x_device *dev)
dev_set_drvdata(&dev->dev, drm);
of_dma_configure(drm->dev, NULL);
+ dma_set_mask(drm->dev, DMA_BIT_MASK(34));
err = drm_dev_register(drm, 0);
if (err < 0)
--
2.7.1
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