int
nouveau_acpi_edid(struct drm_device *dev, struct drm_connector *connector)
{
struct nouveau_connector *nv_connector = nouveau_connector(connector);
struct acpi_device *acpidev;
acpi_handle handle;
int type, ret;
void *edid;
switch (connector->connector_type) {
case DRM_MODE_CONNECTOR_LVDS:
case DRM_MODE_CONNECTOR_eDP:
type = ACPI_VIDEO_DISPLAY_LCD;
break;
default:
return -EINVAL;
}
handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
if (!handle)
return -ENODEV;
ret = acpi_bus_get_device(handle, &acpidev);
if (ret)
return -ENODEV;
ret = acpi_video_get_edid(acpidev, type, -1, &edid);
if (ret < 0)
return ret;
nv_connector->edid = edid;
return 0;
}
void
nouveau_backlight_fini(struct drm_connector *connector)
{
struct nouveau_connector *nv_conn = nouveau_connector(connector);
struct nouveau_backlight *bl = nv_conn->backlight;
if (!bl)
return;
if (bl->id >= 0)
ida_simple_remove(&bl_ida, bl->id);
backlight_device_unregister(bl->dev);
nv_conn->backlight = NULL;
kfree(bl);
}
int
nouveau_backlight_init(struct drm_connector *connector)
{
struct nouveau_drm *drm = nouveau_drm(connector->dev);
struct nouveau_backlight *bl;
struct nouveau_encoder *nv_encoder = NULL;
struct nvif_device *device = &drm->client.device;
char backlight_name[BL_NAME_SIZE];
struct backlight_properties props = {0};
const struct backlight_ops *ops;
int ret;
if (apple_gmux_present()) {
NV_INFO_ONCE(drm, "Apple GMUX detected: not registering Nouveau backlight interface\n");
return 0;
}
if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS)
nv_encoder = find_encoder(connector, DCB_OUTPUT_LVDS);
else if (connector->connector_type == DRM_MODE_CONNECTOR_eDP)
nv_encoder = find_encoder(connector, DCB_OUTPUT_DP);
else
return 0;
if (!nv_encoder)
return 0;
switch (device->info.family) {
case NV_DEVICE_INFO_V0_CURIE:
ret = nv40_backlight_init(nv_encoder, &props, &ops);
break;
case NV_DEVICE_INFO_V0_TESLA:
case NV_DEVICE_INFO_V0_FERMI:
case NV_DEVICE_INFO_V0_KEPLER:
case NV_DEVICE_INFO_V0_MAXWELL:
ret = nv50_backlight_init(nv_encoder, &props, &ops);
break;
default:
return 0;
}
if (ret == -ENODEV)
return 0;
else if (ret)
return ret;
bl = kzalloc(sizeof(*bl), GFP_KERNEL);
if (!bl)
return -ENOMEM;
if (!nouveau_get_backlight_name(backlight_name, bl)) {
NV_ERROR(drm, "Failed to retrieve a unique name for the backlight interface\n");
goto fail_alloc;
}
bl->dev = backlight_device_register(backlight_name, connector->kdev,
nv_encoder, ops, &props);
if (IS_ERR(bl->dev)) {
if (bl->id >= 0)
ida_simple_remove(&bl_ida, bl->id);
ret = PTR_ERR(bl->dev);
goto fail_alloc;
}
nouveau_connector(connector)->backlight = bl;
bl->dev->props.brightness = bl->dev->ops->get_brightness(bl->dev);
backlight_update_status(bl->dev);
return 0;
fail_alloc:
kfree(bl);
return ret;
}