Merge tag 'drm/tegra/for-5.3-rc1' of git://anongit.freedesktop.org/tegra/linux into drm-next

drm/tegra: Changes for v5.3-rc1

This contains a couple of small improvements and cleanups for the Tegra
DRM driver.

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Thierry Reding <thierry.reding@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190621150753.19550-1-thierry.reding@gmail.com

drivers/gpu/host1x/bus.c

@@ -305,6 +305,36 @@ static int host1x_device_match(struct device *dev, struct device_driver *drv)
 	return strcmp(dev_name(dev), drv->name) == 0;
 }
 
+static int host1x_device_uevent(struct device *dev,
+				struct kobj_uevent_env *env)
+{
+	struct device_node *np = dev->parent->of_node;
+	unsigned int count = 0;
+	struct property *p;
+	const char *compat;
+
+	/*
+	 * This duplicates most of of_device_uevent(), but the latter cannot
+	 * be called from modules and operates on dev->of_node, which is not
+	 * available in this case.
+	 *
+	 * Note that this is really only needed for backwards compatibility
+	 * with libdrm, which parses this information from sysfs and will
+	 * fail if it can't find the OF_FULLNAME, specifically.
+	 */
+	add_uevent_var(env, "OF_NAME=%pOFn", np);
+	add_uevent_var(env, "OF_FULLNAME=%pOF", np);
+
+	of_property_for_each_string(np, "compatible", p, compat) {
+		add_uevent_var(env, "OF_COMPATIBLE_%u=%s", count, compat);
+		count++;
+	}
+
+	add_uevent_var(env, "OF_COMPATIBLE_N=%u", count);
+
+	return 0;
+}
+
 static int host1x_dma_configure(struct device *dev)
 {
 	return of_dma_configure(dev, dev->of_node, true);
@@ -322,6 +352,7 @@ static const struct dev_pm_ops host1x_device_pm_ops = {
 struct bus_type host1x_bus_type = {
 	.name = "host1x",
 	.match = host1x_device_match,
+	.uevent = host1x_device_uevent,
 	.dma_configure = host1x_dma_configure,
 	.pm = &host1x_device_pm_ops,
 };
@@ -408,12 +439,14 @@ static int host1x_device_add(struct host1x *host1x,
 	device->dev.dma_mask = &device->dev.coherent_dma_mask;
 	dev_set_name(&device->dev, "%s", driver->driver.name);
 	device->dev.release = host1x_device_release;
-	device->dev.of_node = host1x->dev->of_node;
 	device->dev.bus = &host1x_bus_type;
 	device->dev.parent = host1x->dev;
 
 	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);
+
 	err = host1x_device_parse_dt(device, driver);
 	if (err < 0) {
 		kfree(device);