[PATCH 2/2] drm/tegra: Set the DMA mask

From	Alexandre Courbot <acourbot@nvidia.com>
Newsgroups	linux.kernel
Subject	[PATCH 2/2] drm/tegra: Set the DMA mask
Date	2016-02-23 07:30 +0100
Message-ID	<r5eDU-1jC-3@gated-at.bofh.it> (permalink)
References	<r5eDU-1jC-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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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@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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[PATCH 2/2] drm/tegra: Set the DMA mask Alexandre Courbot <acourbot@nvidia.com> - 2016-02-23 07:30 +0100
  Re: [PATCH 2/2] drm/tegra: Set the DMA mask Thierry Reding <thierry.reding@gmail.com> - 2016-02-23 17:10 +0100
    Re: [PATCH 2/2] drm/tegra: Set the DMA mask Terje Bergstrom <tbergstrom@nvidia.com> - 2016-02-23 17:20 +0100
      Re: [PATCH 2/2] drm/tegra: Set the DMA mask Thierry Reding <thierry.reding@gmail.com> - 2016-02-23 17:30 +0100
    Re: [PATCH 2/2] drm/tegra: Set the DMA mask Alexandre Courbot <acourbot@nvidia.com> - 2016-02-24 09:40 +0100

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