compositor-drm: Load calibration values from udev

This allows the values to be associated with an specific input device using
udev rules.

diff --git a/src/compositor-drm.c b/src/compositor-drm.c
index 24a71f1..27f2c7d 100644 (file)
--- a/src/compositor-drm.c
+++ b/src/compositor-drm.c
@@ -1737,6 +1737,7 @@ device_added(struct udev_device *udev_device, struct drm_seat *master)
        struct evdev_device *device;
        const char *devnode;
        const char *device_seat;
+       const char *calibration_values;
        int fd;
 
        device_seat = udev_device_get_property_value(udev_device, "ID_SEAT");
@@ -1765,6 +1766,28 @@ device_added(struct udev_device *udev_device, struct drm_seat *master)
                return;
        }
 
+       calibration_values =
+               udev_device_get_property_value(udev_device,
+                                              "WL_CALIBRATION");
+
+       if (calibration_values && sscanf(calibration_values,
+                                        "%f %f %f %f %f %f",
+                                        &device->abs.calibration[0],
+                                        &device->abs.calibration[1],
+                                        &device->abs.calibration[2],
+                                        &device->abs.calibration[3],
+                                        &device->abs.calibration[4],
+                                        &device->abs.calibration[5]) == 6) {
+               device->abs.apply_calibration = 1;
+               weston_log ("Applying calibration: %f %f %f %f %f %f\n",
+                           device->abs.calibration[0],
+                           device->abs.calibration[1],
+                           device->abs.calibration[2],
+                           device->abs.calibration[3],
+                           device->abs.calibration[4],
+                           device->abs.calibration[5]);
+       }
+
        wl_list_insert(master->devices_list.prev, &device->link);
 }