1 files changed, 272 insertions, 0 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_core.c b/drivers/gpu/drm/exynos/exynos_drm_core.c
new file mode 100644
index 00000000000..661a03571d0
--- /dev/null
+++ b/drivers/gpu/drm/exynos/exynos_drm_core.c
@@ -0,0 +1,272 @@
+/* exynos_drm_core.c
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * Author:
+ *	Inki Dae <inki.dae@samsung.com>
+ *	Joonyoung Shim <jy0922.shim@samsung.com>
+ *	Seung-Woo Kim <sw0312.kim@samsung.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "drmP.h"
+#include "exynos_drm_drv.h"
+#include "exynos_drm_encoder.h"
+#include "exynos_drm_connector.h"
+#include "exynos_drm_fbdev.h"
+
+static DEFINE_MUTEX(exynos_drm_mutex);
+static LIST_HEAD(exynos_drm_subdrv_list);
+static struct drm_device *drm_dev;
+
+static int exynos_drm_subdrv_probe(struct drm_device *dev,
+					struct exynos_drm_subdrv *subdrv)
+{
+	struct drm_encoder *encoder;
+	struct drm_connector *connector;
+
+	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->manager.dev);
+		if (ret)
+			return ret;
+	}
+
+	/* create and initialize a encoder for this sub driver. */
+	encoder = exynos_drm_encoder_create(dev, &subdrv->manager,
+			(1 << MAX_CRTC) - 1);
+	if (!encoder) {
+		DRM_ERROR("failed to create encoder\n");
+		return -EFAULT;
+	}
+
+	/*
+	 * create and initialize a connector for this sub driver and
+	 * attach the encoder created above to the connector.
+	 */
+	connector = exynos_drm_connector_create(dev, encoder);
+	if (!connector) {
+		DRM_ERROR("failed to create connector\n");
+		encoder->funcs->destroy(encoder);
+		return -EFAULT;
+	}
+
+	subdrv->encoder = encoder;
+	subdrv->connector = connector;
+
+	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);
+
+	if (subdrv->encoder) {
+		struct drm_encoder *encoder = subdrv->encoder;
+		encoder->funcs->destroy(encoder);
+		subdrv->encoder = NULL;
+	}
+
+	if (subdrv->connector) {
+		struct drm_connector *connector = subdrv->connector;
+		connector->funcs->destroy(connector);
+		subdrv->connector = NULL;
+	}
+}
+
+int exynos_drm_device_register(struct drm_device *dev)
+{
+	struct exynos_drm_subdrv *subdrv, *n;
+	int err;
+
+	DRM_DEBUG_DRIVER("%s\n", __FILE__);
+
+	if (!dev)
+		return -EINVAL;
+
+	if (drm_dev) {
+		DRM_ERROR("Already drm device were registered\n");
+		return -EBUSY;
+	}
+
+	mutex_lock(&exynos_drm_mutex);
+	list_for_each_entry_safe(subdrv, n, &exynos_drm_subdrv_list, list) {
+		err = exynos_drm_subdrv_probe(dev, subdrv);
+		if (err) {
+			DRM_DEBUG("exynos drm subdrv probe failed.\n");
+			list_del(&subdrv->list);
+		}
+	}
+
+	drm_dev = dev;
+	mutex_unlock(&exynos_drm_mutex);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(exynos_drm_device_register);
+
+int exynos_drm_device_unregister(struct drm_device *dev)
+{
+	struct exynos_drm_subdrv *subdrv;
+
+	DRM_DEBUG_DRIVER("%s\n", __FILE__);
+
+	if (!dev || dev != drm_dev) {
+		WARN(1, "Unexpected drm device unregister!\n");
+		return -EINVAL;
+	}
+
+	mutex_lock(&exynos_drm_mutex);
+	list_for_each_entry(subdrv, &exynos_drm_subdrv_list, list)
+		exynos_drm_subdrv_remove(dev, subdrv);
+
+	drm_dev = NULL;
+	mutex_unlock(&exynos_drm_mutex);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(exynos_drm_device_unregister);
+
+static int exynos_drm_mode_group_reinit(struct drm_device *dev)
+{
+	struct drm_mode_group *group = &dev->primary->mode_group;
+	uint32_t *id_list = group->id_list;
+	int ret;
+
+	DRM_DEBUG_DRIVER("%s\n", __FILE__);
+
+	ret = drm_mode_group_init_legacy_group(dev, group);
+	if (ret < 0)
+		return ret;
+
+	kfree(id_list);
+	return 0;
+}
+
+int exynos_drm_subdrv_register(struct exynos_drm_subdrv *subdrv)
+{
+	int err;
+
+	DRM_DEBUG_DRIVER("%s\n", __FILE__);
+
+	if (!subdrv)
+		return -EINVAL;
+
+	mutex_lock(&exynos_drm_mutex);
+	if (drm_dev) {
+		err = exynos_drm_subdrv_probe(drm_dev, subdrv);
+		if (err) {
+			DRM_ERROR("failed to probe exynos drm subdrv\n");
+			mutex_unlock(&exynos_drm_mutex);
+			return err;
+		}
+
+		/*
+		 * if any specific driver such as fimd or hdmi driver called
+		 * exynos_drm_subdrv_register() later than drm_load(),
+		 * the fb helper should be re-initialized and re-configured.
+		 */
+		err = exynos_drm_fbdev_reinit(drm_dev);
+		if (err) {
+			DRM_ERROR("failed to reinitialize exynos drm fbdev\n");
+			exynos_drm_subdrv_remove(drm_dev, subdrv);
+			mutex_unlock(&exynos_drm_mutex);
+			return err;
+		}
+
+		err = exynos_drm_mode_group_reinit(drm_dev);
+		if (err) {
+			DRM_ERROR("failed to reinitialize mode group\n");
+			exynos_drm_fbdev_fini(drm_dev);
+			exynos_drm_subdrv_remove(drm_dev, subdrv);
+			mutex_unlock(&exynos_drm_mutex);
+			return err;
+		}
+	}
+
+	subdrv->drm_dev = drm_dev;
+
+	list_add_tail(&subdrv->list, &exynos_drm_subdrv_list);
+	mutex_unlock(&exynos_drm_mutex);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(exynos_drm_subdrv_register);
+
+int exynos_drm_subdrv_unregister(struct exynos_drm_subdrv *subdrv)
+{
+	int ret = -EFAULT;
+
+	DRM_DEBUG_DRIVER("%s\n", __FILE__);
+
+	if (!subdrv) {
+		DRM_DEBUG("Unexpected exynos drm subdrv unregister!\n");
+		return ret;
+	}
+
+	mutex_lock(&exynos_drm_mutex);
+	if (drm_dev) {
+		exynos_drm_subdrv_remove(drm_dev, subdrv);
+		list_del(&subdrv->list);
+
+		/*
+		 * fb helper should be updated once a sub driver is released
+		 * to re-configure crtc and connector and also to re-setup
+		 * drm framebuffer.
+		 */
+		ret = exynos_drm_fbdev_reinit(drm_dev);
+		if (ret < 0) {
+			DRM_ERROR("failed fb helper reinit.\n");
+			goto fail;
+		}
+
+		ret = exynos_drm_mode_group_reinit(drm_dev);
+		if (ret < 0) {
+			DRM_ERROR("failed drm mode group reinit.\n");
+			goto fail;
+		}
+	}
+
+fail:
+	mutex_unlock(&exynos_drm_mutex);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(exynos_drm_subdrv_unregister);
+
+MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
+MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
+MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
+MODULE_DESCRIPTION("Samsung SoC DRM Core Driver");
+MODULE_LICENSE("GPL");