gpu: host1x: Do not limit DMA segment size

host1x nor any its clients have any limitations on the DMA segment size,
so don't pretend that they do.
Signed-off-by: Thierry Reding <treding@nvidia.com>

drivers/gpu/host1x/bus.c

@@ -445,7 +445,7 @@ static int host1x_device_add(struct host1x *host1x,
 	of_dma_configure(&device->dev, host1x->dev->of_node, true);
 
 	device->dev.dma_parms = &device->dma_parms;
-	dma_set_max_seg_size(&device->dev, SZ_4M);
+	dma_set_max_seg_size(&device->dev, UINT_MAX);
 
 	err = host1x_device_parse_dt(device, driver);
 	if (err < 0) {

drivers/gpu/host1x/dev.c

@@ -237,6 +237,9 @@ static int host1x_probe(struct platform_device *pdev)
 			return PTR_ERR(host->hv_regs);
 	}
 
+	host->dev->dma_parms = &host->dma_parms;
+	dma_set_max_seg_size(host->dev, UINT_MAX);
+
 	dma_set_mask_and_coherent(host->dev, host->info->dma_mask);
 
 	if (host->info->init) {

drivers/gpu/host1x/dev.h

@@ -140,6 +140,8 @@ struct host1x {
 	struct list_head devices;
 
 	struct list_head list;
+
+	struct device_dma_parameters dma_parms;
 };
 
 void host1x_hypervisor_writel(struct host1x *host1x, u32 r, u32 v);