From 3eb578e2d5ab244085638c08c340e9e0084e8688 Mon Sep 17 00:00:00 2001 From: Andrzej Hajda Date: Fri, 28 Mar 2014 12:52:38 +0100 Subject: [PATCH] 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 Signed-off-by: Inki Dae --- drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c index 5fa342e5f963..addbf7536da4 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c +++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c @@ -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; -- 2.20.1