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authorThierry Reding <treding@nvidia.com>2019-01-23 12:34:05 +0100
committerThierry Reding <treding@nvidia.com>2019-02-04 08:35:54 +0100
commitf67524caf49949b8d1a219f1fd8ea263854a6683 (patch)
treed50ad57dc340eafe046830c616ee5e7f12e05744 /drivers
parent0747a672a32829809675028ba396f394b104ee31 (diff)
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/host1x/bus.c35
1 files changed, 35 insertions, 0 deletions
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;
}