Signed-off-by: Thomas Wood <thomas.wood at intel.com>
---
drivers/gpu/drm/drm_sysfs.c | 49 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 49 insertions(+)
diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c
index c22c309..257816e 100644
--- a/drivers/gpu/drm/drm_sysfs.c
+++ b/drivers/gpu/drm/drm_sysfs.c
@@ -338,11 +338,60 @@ static ssize_t select_subconnector_show(struct device
*device,
drm_get_dvi_i_select_name((int)subconnector));
}
+static ssize_t force_show(struct device *device,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct drm_connector *connector = to_drm_connector(device);
+ char *status;
+
+ switch (connector->force) {
+ case DRM_FORCE_ON:
+ status = "on";
+ break;
+
+ case DRM_FORCE_ON_DIGITAL:
+ status = "digital";
+ break;
+
+ case DRM_FORCE_OFF:
+ status = "off";
+ break;
+
+ case DRM_FORCE_UNSPECIFIED:
+ status = "unspecified";
+ break;
+
+ default:
+ return 0;
+ }
+
+ return snprintf(buf, PAGE_SIZE, "%s\n", status);
+}
+
+ssize_t force_store(struct device *device, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct drm_connector *connector = to_drm_connector(device);
+
+ if (strcmp(buf, "on") == 0)
+ connector->force = DRM_FORCE_ON;
+ else if (strcmp(buf, "digital") == 0)
+ connector->force = DRM_FORCE_ON_DIGITAL;
+ else if (strcmp(buf, "off") == 0)
+ connector->force = DRM_FORCE_OFF;
+ else if (strcmp(buf, "unspecified") == 0)
+ connector->force = DRM_FORCE_UNSPECIFIED;
+
+ return count;
+}
+
static struct device_attribute connector_attrs[] = {
__ATTR_RO(status),
__ATTR_RO(enabled),
__ATTR_RO(dpms),
__ATTR_RO(modes),
+ __ATTR_RW(force),
};
/* These attributes are for both DVI-I connectors and all types of tv-out. */
--
1.9.0
