drm/exynos: disallow fbdev initialization if no device is connected
This patch adds explicit check if there is a connector with connected status before fbdev initialization. It prevents creation of default fbdev 1024x768 which is unusable on panels with bigger resolutions. Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
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@ -237,6 +237,24 @@ static struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = {
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.fb_probe = exynos_drm_fbdev_create,
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};
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bool exynos_drm_fbdev_is_anything_connected(struct drm_device *dev)
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{
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struct drm_connector *connector;
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bool ret = false;
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mutex_lock(&dev->mode_config.mutex);
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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if (connector->status != connector_status_connected)
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continue;
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ret = true;
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break;
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}
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mutex_unlock(&dev->mode_config.mutex);
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return ret;
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}
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int exynos_drm_fbdev_init(struct drm_device *dev)
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{
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struct exynos_drm_fbdev *fbdev;
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@ -248,6 +266,9 @@ int exynos_drm_fbdev_init(struct drm_device *dev)
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if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector)
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return 0;
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if (!exynos_drm_fbdev_is_anything_connected(dev))
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return 0;
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fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
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if (!fbdev)
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return -ENOMEM;
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