mirror of https://gitee.com/openkylin/linux.git
gpu: host1x: Support sub-devices recursively
The display architecture in Tegra186 changes slightly compared to earlier Tegra generations, which requires that we recursively scan host1x sub-devices from device tree. Signed-off-by: Thierry Reding <treding@nvidia.com>
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7b2c63de20
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@ -45,9 +45,12 @@ struct host1x_subdev {
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* @np: device node
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*/
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static int host1x_subdev_add(struct host1x_device *device,
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struct host1x_driver *driver,
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struct device_node *np)
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{
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struct host1x_subdev *subdev;
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struct device_node *child;
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int err;
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subdev = kzalloc(sizeof(*subdev), GFP_KERNEL);
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if (!subdev)
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@ -60,6 +63,19 @@ static int host1x_subdev_add(struct host1x_device *device,
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list_add_tail(&subdev->list, &device->subdevs);
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mutex_unlock(&device->subdevs_lock);
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/* recursively add children */
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for_each_child_of_node(np, child) {
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if (of_match_node(driver->subdevs, child) &&
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of_device_is_available(child)) {
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err = host1x_subdev_add(device, driver, child);
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if (err < 0) {
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/* XXX cleanup? */
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of_node_put(child);
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return err;
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}
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}
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}
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return 0;
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}
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@ -88,7 +104,7 @@ static int host1x_device_parse_dt(struct host1x_device *device,
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for_each_child_of_node(device->dev.parent->of_node, np) {
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if (of_match_node(driver->subdevs, np) &&
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of_device_is_available(np)) {
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err = host1x_subdev_add(device, np);
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err = host1x_subdev_add(device, driver, np);
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if (err < 0) {
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of_node_put(np);
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return err;
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