diff options
| author | Thierry Reding <treding@nvidia.com> | 2017-08-15 16:46:22 +0300 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2017-08-17 18:57:08 +0300 |
| commit | 25ae30d2a84cf4bc6c8e8bc53c63f261cc190616 (patch) | |
| tree | 0783b2ebba302efccc2063795612e4008bbfaf8b /drivers/gpu/host1x | |
| parent | 7b2c63de20080c18d0de35b292ad61fc9bc8328e (diff) | |
| download | linux-25ae30d2a84cf4bc6c8e8bc53c63f261cc190616.tar.xz | |
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>
Diffstat (limited to 'drivers/gpu/host1x')
| -rw-r--r-- | drivers/gpu/host1x/bus.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/gpu/host1x/bus.c b/drivers/gpu/host1x/bus.c index a048e3ac523d..6693abeca0ed 100644 --- a/drivers/gpu/host1x/bus.c +++ b/drivers/gpu/host1x/bus.c @@ -45,9 +45,12 @@ struct host1x_subdev { * @np: device node */ static int host1x_subdev_add(struct host1x_device *device, + struct host1x_driver *driver, struct device_node *np) { struct host1x_subdev *subdev; + struct device_node *child; + int err; subdev = kzalloc(sizeof(*subdev), GFP_KERNEL); if (!subdev) @@ -60,6 +63,19 @@ static int host1x_subdev_add(struct host1x_device *device, list_add_tail(&subdev->list, &device->subdevs); mutex_unlock(&device->subdevs_lock); + /* recursively add children */ + for_each_child_of_node(np, child) { + if (of_match_node(driver->subdevs, child) && + of_device_is_available(child)) { + err = host1x_subdev_add(device, driver, child); + if (err < 0) { + /* XXX cleanup? */ + of_node_put(child); + return err; + } + } + } + return 0; } @@ -88,7 +104,7 @@ static int host1x_device_parse_dt(struct host1x_device *device, for_each_child_of_node(device->dev.parent->of_node, np) { if (of_match_node(driver->subdevs, np) && of_device_is_available(np)) { - err = host1x_subdev_add(device, np); + err = host1x_subdev_add(device, driver, np); if (err < 0) { of_node_put(np); return err; |