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drm/exynos: disallow fbdev initialization if no device is connected

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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 <[email protected]>
Signed-off-by: Inki Dae <[email protected]>
This commit is contained in:
Andrzej Hajda 2014-03-28 12:52:38 +01:00 • committed by Inki Dae
commit 3eb578e2d5
1 changed files with 21 additions and 0 deletions
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21
drivers/gpu/drm/exynos/exynos_drm_fbdev.c
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@ -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;