msm: sde: avoid segmentation of dma_buf mappings



Ensure dma_buf mappings aren't broken in to multiple segments
by setting the devices segment size and boundary.  This will
improve performance and the sg_dma_len() API will now give
the full buffer size.

Change-Id: Ic8a6ac00e839255bee8b9fb09362b4a5c51d1f83
Signed-off-by: Steve Cohen <cohens@codeaurora.org>

parent 068d6b16

drivers/media/platform/msm/sde/rotator/sde_rotator_smmu.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -639,6 +639,13 @@ int sde_smmu_probe(struct platform_device *pdev)
		}
		}

		if (!dev->dma_parms)
		dev->dma_parms = devm_kzalloc(dev,
		sizeof(*dev->dma_parms), GFP_KERNEL);

		dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
		dma_set_seg_boundary(dev, DMA_BIT_MASK(64));

		iommu_set_fault_handler(sde_smmu->mmu_mapping->domain,
		sde_smmu_fault_handler, (void *)sde_smmu);