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@xxxxxxxxxx> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
