From 86044e749be77a3544990027244abb20ddb3caf0 Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Fri, 26 Mar 2021 15:51:32 +0100 Subject: drm/tegra: dc: Inherit DMA mask Inherit the DMA mask from host1x (on Tegra210 and earlier) or the display hub (on Tegra186 and later). This is necessary in order to properly map buffers without SMMU support and use the maximum IOVA space available with SMMU support. Signed-off-by: Thierry Reding --- drivers/gpu/drm/tegra/dc.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'drivers/gpu/drm/tegra/dc.c') diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c index 40bf8f33a2ae..935717e7410d 100644 --- a/drivers/gpu/drm/tegra/dc.c +++ b/drivers/gpu/drm/tegra/dc.c @@ -2538,9 +2538,16 @@ static int tegra_dc_couple(struct tegra_dc *dc) static int tegra_dc_probe(struct platform_device *pdev) { + u64 dma_mask = dma_get_mask(pdev->dev.parent); struct tegra_dc *dc; int err; + err = dma_coerce_mask_and_coherent(&pdev->dev, dma_mask); + if (err < 0) { + dev_err(&pdev->dev, "failed to set DMA mask: %d\n", err); + return err; + } + dc = devm_kzalloc(&pdev->dev, sizeof(*dc), GFP_KERNEL); if (!dc) return -ENOMEM; -- cgit v1.2.3-59-g8ed1b