1 files changed, 369 insertions, 0 deletions
diff --git a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c
new file mode 100644
index 000000000000..d8cc12a3c5d5
--- /dev/null
+++ b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c
@@ -0,0 +1,369 @@
+/*
+ * Hisilicon Kirin SoCs drm master driver
+ *
+ * Copyright (c) 2016 Linaro Limited.
+ * Copyright (c) 2014-2016 Hisilicon Limited.
+ *
+ * Author:
+ *	Xinliang Liu <z.liuxinliang@hisilicon.com>
+ *	Xinliang Liu <xinliang.liu@linaro.org>
+ *	Xinwei Kong <kong.kongxinwei@hisilicon.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/of_platform.h>
+#include <linux/component.h>
+#include <linux/of_graph.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
+
+#include "kirin_drm_drv.h"
+
+static struct kirin_dc_ops *dc_ops;
+
+static int kirin_drm_kms_cleanup(struct drm_device *dev)
+{
+	struct kirin_drm_private *priv = dev->dev_private;
+
+#ifdef CONFIG_DRM_FBDEV_EMULATION
+	if (priv->fbdev) {
+		drm_fbdev_cma_fini(priv->fbdev);
+		priv->fbdev = NULL;
+	}
+#endif
+	drm_kms_helper_poll_fini(dev);
+	drm_vblank_cleanup(dev);
+	dc_ops->cleanup(dev);
+	drm_mode_config_cleanup(dev);
+	devm_kfree(dev->dev, priv);
+	dev->dev_private = NULL;
+
+	return 0;
+}
+
+static void kirin_fbdev_output_poll_changed(struct drm_device *dev)
+{
+#ifdef CONFIG_DRM_FBDEV_EMULATION
+	struct kirin_drm_private *priv = dev->dev_private;
+#endif
+
+	dsi_set_output_client(dev);
+
+#ifdef CONFIG_DRM_FBDEV_EMULATION
+	if (priv->fbdev) {
+		drm_fbdev_cma_hotplug_event(priv->fbdev);
+	} else {
+		priv->fbdev = drm_fbdev_cma_init(dev, 32,
+				dev->mode_config.num_crtc,
+				dev->mode_config.num_connector);
+		if (IS_ERR(priv->fbdev))
+			priv->fbdev = NULL;
+	}
+#endif
+}
+
+static const struct drm_mode_config_funcs kirin_drm_mode_config_funcs = {
+	.fb_create = drm_fb_cma_create,
+	.output_poll_changed = kirin_fbdev_output_poll_changed,
+	.atomic_check = drm_atomic_helper_check,
+	.atomic_commit = drm_atomic_helper_commit,
+};
+
+static void kirin_drm_mode_config_init(struct drm_device *dev)
+{
+	dev->mode_config.min_width = 0;
+	dev->mode_config.min_height = 0;
+
+	dev->mode_config.max_width = 2048;
+	dev->mode_config.max_height = 2048;
+
+	dev->mode_config.funcs = &kirin_drm_mode_config_funcs;
+}
+
+static int kirin_drm_kms_init(struct drm_device *dev)
+{
+	struct kirin_drm_private *priv;
+	int ret;
+
+	priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	dev->dev_private = priv;
+	dev_set_drvdata(dev->dev, dev);
+
+	/* dev->mode_config initialization */
+	drm_mode_config_init(dev);
+	kirin_drm_mode_config_init(dev);
+
+	/* display controller init */
+	ret = dc_ops->init(dev);
+	if (ret)
+		goto err_mode_config_cleanup;
+
+	/* bind and init sub drivers */
+	ret = component_bind_all(dev->dev, dev);
+	if (ret) {
+		DRM_ERROR("failed to bind all component.\n");
+		goto err_dc_cleanup;
+	}
+
+	/* vblank init */
+	ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
+	if (ret) {
+		DRM_ERROR("failed to initialize vblank.\n");
+		goto err_unbind_all;
+	}
+	/* with irq_enabled = true, we can use the vblank feature. */
+	dev->irq_enabled = true;
+
+	/* reset all the states of crtc/plane/encoder/connector */
+	drm_mode_config_reset(dev);
+
+	/* init kms poll for handling hpd */
+	drm_kms_helper_poll_init(dev);
+
+	/* force detection after connectors init */
+	(void)drm_helper_hpd_irq_event(dev);
+
+	return 0;
+
+err_unbind_all:
+	component_unbind_all(dev->dev, dev);
+err_dc_cleanup:
+	dc_ops->cleanup(dev);
+err_mode_config_cleanup:
+	drm_mode_config_cleanup(dev);
+	devm_kfree(dev->dev, priv);
+	dev->dev_private = NULL;
+
+	return ret;
+}
+
+static const struct file_operations kirin_drm_fops = {
+	.owner		= THIS_MODULE,
+	.open		= drm_open,
+	.release	= drm_release,
+	.unlocked_ioctl	= drm_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= drm_compat_ioctl,
+#endif
+	.poll		= drm_poll,
+	.read		= drm_read,
+	.llseek		= no_llseek,
+	.mmap		= drm_gem_cma_mmap,
+};
+
+static int kirin_gem_cma_dumb_create(struct drm_file *file,
+				     struct drm_device *dev,
+				     struct drm_mode_create_dumb *args)
+{
+	return drm_gem_cma_dumb_create_internal(file, dev, args);
+}
+
+static struct drm_driver kirin_drm_driver = {
+	.driver_features	= DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
+				  DRIVER_ATOMIC | DRIVER_HAVE_IRQ,
+	.fops			= &kirin_drm_fops,
+	.set_busid		= drm_platform_set_busid,
+
+	.gem_free_object	= drm_gem_cma_free_object,
+	.gem_vm_ops		= &drm_gem_cma_vm_ops,
+	.dumb_create		= kirin_gem_cma_dumb_create,
+	.dumb_map_offset	= drm_gem_cma_dumb_map_offset,
+	.dumb_destroy		= drm_gem_dumb_destroy,
+
+	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
+	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
+	.gem_prime_export	= drm_gem_prime_export,
+	.gem_prime_import	= drm_gem_prime_import,
+	.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
+	.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
+	.gem_prime_vmap		= drm_gem_cma_prime_vmap,
+	.gem_prime_vunmap	= drm_gem_cma_prime_vunmap,
+	.gem_prime_mmap		= drm_gem_cma_prime_mmap,
+
+	.name			= "kirin",
+	.desc			= "Hisilicon Kirin SoCs' DRM Driver",
+	.date			= "20150718",
+	.major			= 1,
+	.minor			= 0,
+};
+
+static int compare_of(struct device *dev, void *data)
+{
+	return dev->of_node == data;
+}
+
+static int kirin_drm_connectors_register(struct drm_device *dev)
+{
+	struct drm_connector *connector;
+	struct drm_connector *failed_connector;
+	int ret;
+
+	mutex_lock(&dev->mode_config.mutex);
+	drm_for_each_connector(connector, dev) {
+		ret = drm_connector_register(connector);
+		if (ret) {
+			failed_connector = connector;
+			goto err;
+		}
+	}
+	mutex_unlock(&dev->mode_config.mutex);
+
+	return 0;
+
+err:
+	drm_for_each_connector(connector, dev) {
+		if (failed_connector == connector)
+			break;
+		drm_connector_unregister(connector);
+	}
+	mutex_unlock(&dev->mode_config.mutex);
+
+	return ret;
+}
+
+static int kirin_drm_bind(struct device *dev)
+{
+	struct drm_driver *driver = &kirin_drm_driver;
+	struct drm_device *drm_dev;
+	int ret;
+
+	drm_dev = drm_dev_alloc(driver, dev);
+	if (!drm_dev)
+		return -ENOMEM;
+
+	drm_dev->platformdev = to_platform_device(dev);
+
+	ret = kirin_drm_kms_init(drm_dev);
+	if (ret)
+		goto err_drm_dev_unref;
+
+	ret = drm_dev_register(drm_dev, 0);
+	if (ret)
+		goto err_kms_cleanup;
+
+	/* connectors should be registered after drm device register */
+	ret = kirin_drm_connectors_register(drm_dev);
+	if (ret)
+		goto err_drm_dev_unregister;
+
+	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
+		 driver->name, driver->major, driver->minor, driver->patchlevel,
+		 driver->date, drm_dev->primary->index);
+
+	return 0;
+
+err_drm_dev_unregister:
+	drm_dev_unregister(drm_dev);
+err_kms_cleanup:
+	kirin_drm_kms_cleanup(drm_dev);
+err_drm_dev_unref:
+	drm_dev_unref(drm_dev);
+
+	return ret;
+}
+
+static void kirin_drm_unbind(struct device *dev)
+{
+	drm_put_dev(dev_get_drvdata(dev));
+}
+
+static const struct component_master_ops kirin_drm_ops = {
+	.bind = kirin_drm_bind,
+	.unbind = kirin_drm_unbind,
+};
+
+static struct device_node *kirin_get_remote_node(struct device_node *np)
+{
+	struct device_node *endpoint, *remote;
+
+	/* get the first endpoint, in our case only one remote node
+	 * is connected to display controller.
+	 */
+	endpoint = of_graph_get_next_endpoint(np, NULL);
+	if (!endpoint) {
+		DRM_ERROR("no valid endpoint node\n");
+		return ERR_PTR(-ENODEV);
+	}
+	of_node_put(endpoint);
+
+	remote = of_graph_get_remote_port_parent(endpoint);
+	if (!remote) {
+		DRM_ERROR("no valid remote node\n");
+		return ERR_PTR(-ENODEV);
+	}
+	of_node_put(remote);
+
+	if (!of_device_is_available(remote)) {
+		DRM_ERROR("not available for remote node\n");
+		return ERR_PTR(-ENODEV);
+	}
+
+	return remote;
+}
+
+static int kirin_drm_platform_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct component_match *match = NULL;
+	struct device_node *remote;
+
+	dc_ops = (struct kirin_dc_ops *)of_device_get_match_data(dev);
+	if (!dc_ops) {
+		DRM_ERROR("failed to get dt id data\n");
+		return -EINVAL;
+	}
+
+	remote = kirin_get_remote_node(np);
+	if (IS_ERR(remote))
+		return PTR_ERR(remote);
+
+	component_match_add(dev, &match, compare_of, remote);
+
+	return component_master_add_with_match(dev, &kirin_drm_ops, match);
+
+	return 0;
+}
+
+static int kirin_drm_platform_remove(struct platform_device *pdev)
+{
+	component_master_del(&pdev->dev, &kirin_drm_ops);
+	dc_ops = NULL;
+	return 0;
+}
+
+static const struct of_device_id kirin_drm_dt_ids[] = {
+	{ .compatible = "hisilicon,hi6220-ade",
+	  .data = &ade_dc_ops,
+	},
+	{ /* end node */ },
+};
+MODULE_DEVICE_TABLE(of, kirin_drm_dt_ids);
+
+static struct platform_driver kirin_drm_platform_driver = {
+	.probe = kirin_drm_platform_probe,
+	.remove = kirin_drm_platform_remove,
+	.driver = {
+		.name = "kirin-drm",
+		.of_match_table = kirin_drm_dt_ids,
+	},
+};
+
+module_platform_driver(kirin_drm_platform_driver);
+
+MODULE_AUTHOR("Xinliang Liu <xinliang.liu@linaro.org>");
+MODULE_AUTHOR("Xinliang Liu <z.liuxinliang@hisilicon.com>");
+MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>");
+MODULE_DESCRIPTION("hisilicon Kirin SoCs' DRM master driver");
+MODULE_LICENSE("GPL v2");