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Commit 3eb578e2 authored by Andrzej Hajda's avatar Andrzej Hajda Committed by Inki Dae
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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: default avatarAndrzej Hajda <a.hajda@samsung.com>
Signed-off-by: default avatarInki Dae <inki.dae@samsung.com>
parent e49640da

drivers/gpu/drm/exynos/exynos_drm_fbdev.c

+21 −0
Original line number Diff line number Diff line
@@ -237,6 +237,24 @@ static struct drm_fb_helper_funcs exynos_drm_fb_helper_funcs = { 
	.fb_probe =	exynos_drm_fbdev_create,

};



bool exynos_drm_fbdev_is_anything_connected(struct drm_device *dev)

{

	struct drm_connector *connector;

	bool ret = false;



	mutex_lock(&dev->mode_config.mutex);

	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {

		if (connector->status != connector_status_connected)

			continue;



		ret = true;

		break;

	}

	mutex_unlock(&dev->mode_config.mutex);



	return ret;

}



int exynos_drm_fbdev_init(struct drm_device *dev)

{

	struct exynos_drm_fbdev *fbdev;
@@ -248,6 +266,9 @@ int exynos_drm_fbdev_init(struct drm_device *dev) 
	if (!dev->mode_config.num_crtc || !dev->mode_config.num_connector)

		return 0;



	if (!exynos_drm_fbdev_is_anything_connected(dev))

		return 0;



	fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);

	if (!fbdev)

		return -ENOMEM;