this patch separates exynos_drm_subdrv_probe function into sub driver's probe call and encoder/connector creation so that exynos drm core module can take exception when some operation was failed properly.
Signed-off-by: Inki Dae inki.dae@samsung.com Signed-off-by: Kyungmin Park kyungmin.park@samsung.com --- drivers/gpu/drm/exynos/exynos_drm_core.c | 93 +++++++++++++++++++++--------- 1 files changed, 65 insertions(+), 28 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_core.c b/drivers/gpu/drm/exynos/exynos_drm_core.c index 84dd099..1c8d5fe 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_core.c +++ b/drivers/gpu/drm/exynos/exynos_drm_core.c @@ -34,30 +34,15 @@
static LIST_HEAD(exynos_drm_subdrv_list);
-static int exynos_drm_subdrv_probe(struct drm_device *dev, +static int exynos_drm_create_enc_conn(struct drm_device *dev, struct exynos_drm_subdrv *subdrv) { struct drm_encoder *encoder; struct drm_connector *connector; + int ret;
DRM_DEBUG_DRIVER("%s\n", __FILE__);
- if (subdrv->probe) { - int ret; - - /* - * this probe callback would be called by sub driver - * after setting of all resources to this sub driver, - * such as clock, irq and register map are done or by load() - * of exynos drm driver. - * - * P.S. note that this driver is considered for modularization. - */ - ret = subdrv->probe(dev, subdrv->dev); - if (ret) - return ret; - } - if (!subdrv->manager) return 0;
@@ -78,24 +63,22 @@ static int exynos_drm_subdrv_probe(struct drm_device *dev, connector = exynos_drm_connector_create(dev, encoder); if (!connector) { DRM_ERROR("failed to create connector\n"); - encoder->funcs->destroy(encoder); - return -EFAULT; + ret = -EFAULT; + goto err_destroy_encoder; }
subdrv->encoder = encoder; subdrv->connector = connector;
return 0; + +err_destroy_encoder: + encoder->funcs->destroy(encoder); + return ret; }
-static void exynos_drm_subdrv_remove(struct drm_device *dev, - struct exynos_drm_subdrv *subdrv) +static void exynos_drm_destroy_enc_conn(struct exynos_drm_subdrv *subdrv) { - DRM_DEBUG_DRIVER("%s\n", __FILE__); - - if (subdrv->remove) - subdrv->remove(dev); - if (subdrv->encoder) { struct drm_encoder *encoder = subdrv->encoder; encoder->funcs->destroy(encoder); @@ -109,9 +92,48 @@ static void exynos_drm_subdrv_remove(struct drm_device *dev, } }
+static int exynos_drm_subdrv_probe(struct drm_device *dev, + struct exynos_drm_subdrv *subdrv) +{ + if (subdrv->probe) { + int ret; + + subdrv->drm_dev = dev; + + /* + * this probe callback would be called by sub driver + * after setting of all resources to this sub driver, + * such as clock, irq and register map are done or by load() + * of exynos drm driver. + * + * P.S. note that this driver is considered for modularization. + */ + ret = subdrv->probe(dev, subdrv->dev); + if (ret) + return ret; + } + + if (!subdrv->manager) + return -EINVAL; + + subdrv->manager->dev = subdrv->dev; + + return 0; +} + +static void exynos_drm_subdrv_remove(struct drm_device *dev, + struct exynos_drm_subdrv *subdrv) +{ + DRM_DEBUG_DRIVER("%s\n", __FILE__); + + if (subdrv->remove) + subdrv->remove(dev, subdrv->dev); +} + int exynos_drm_device_register(struct drm_device *dev) { struct exynos_drm_subdrv *subdrv, *n; + unsigned int fine_cnt = 0; int err;
DRM_DEBUG_DRIVER("%s\n", __FILE__); @@ -120,14 +142,27 @@ int exynos_drm_device_register(struct drm_device *dev) return -EINVAL;
list_for_each_entry_safe(subdrv, n, &exynos_drm_subdrv_list, list) { - subdrv->drm_dev = dev; err = exynos_drm_subdrv_probe(dev, subdrv); if (err) { DRM_DEBUG("exynos drm subdrv probe failed.\n"); list_del(&subdrv->list); + continue; } + + err = exynos_drm_create_enc_conn(dev, subdrv); + if (err) { + DRM_DEBUG("failed to create encoder and connector.\n"); + exynos_drm_subdrv_remove(dev, subdrv); + list_del(&subdrv->list); + continue; + } + + fine_cnt++; }
+ if (!fine_cnt) + return -EINVAL; + return 0; } EXPORT_SYMBOL_GPL(exynos_drm_device_register); @@ -143,8 +178,10 @@ int exynos_drm_device_unregister(struct drm_device *dev) return -EINVAL; }
- list_for_each_entry(subdrv, &exynos_drm_subdrv_list, list) + list_for_each_entry(subdrv, &exynos_drm_subdrv_list, list) { exynos_drm_subdrv_remove(dev, subdrv); + exynos_drm_destroy_enc_conn(subdrv); + }
return 0; }