From: Thierry Reding <tred...@nvidia.com> This new debugfs file represents the state of host1x bus devices, specifying the list of subdevices and marking which ones have successfully registered.
Signed-off-by: Thierry Reding <tred...@nvidia.com> --- drivers/gpu/host1x/bus.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/drivers/gpu/host1x/bus.c b/drivers/gpu/host1x/bus.c index b4c385d4a6af..103fffc1904b 100644 --- a/drivers/gpu/host1x/bus.c +++ b/drivers/gpu/host1x/bus.c @@ -15,8 +15,10 @@ * along with this program. If not, see <http://www.gnu.org/licenses/>. */ +#include <linux/debugfs.h> #include <linux/host1x.h> #include <linux/of.h> +#include <linux/seq_file.h> #include <linux/slab.h> #include <linux/of_device.h> @@ -500,6 +502,36 @@ static void host1x_detach_driver(struct host1x *host1x, mutex_unlock(&host1x->devices_lock); } +static int host1x_devices_show(struct seq_file *s, void *data) +{ + struct host1x *host1x = s->private; + struct host1x_device *device; + + mutex_lock(&host1x->devices_lock); + + list_for_each_entry(device, &host1x->devices, list) { + struct host1x_subdev *subdev; + + seq_printf(s, "%s\n", dev_name(&device->dev)); + + mutex_lock(&device->subdevs_lock); + + list_for_each_entry(subdev, &device->active, list) + seq_printf(s, " %pOFf: %s\n", subdev->np, + dev_name(subdev->client->dev)); + + list_for_each_entry(subdev, &device->subdevs, list) + seq_printf(s, " %pOFf:\n", subdev->np); + + mutex_unlock(&device->subdevs_lock); + } + + mutex_unlock(&host1x->devices_lock); + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(host1x_devices); + /** * host1x_register() - register a host1x controller * @host1x: host1x controller @@ -523,6 +555,9 @@ int host1x_register(struct host1x *host1x) mutex_unlock(&drivers_lock); + debugfs_create_file("devices", S_IRUGO, host1x->debugfs, host1x, + &host1x_devices_fops); + return 0; } -- 2.19.1 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
