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gpu: host1x: Represent host1x bus devices in debugfs 

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 <treding@nvidia.com>
hifive-unleashed-5.1
Thierry Reding 2019-01-23 12:34:05 +01:00
parent 0747a672a3
commit f67524caf4
1 changed files with 35 additions and 0 deletions
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35
drivers/gpu/host1x/bus.c
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@ -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;
}