1 files changed, 551 insertions, 0 deletions

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
new file mode 100644
index 000000000000..a798c7c71f91
--- /dev/null
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -0,0 +1,551 @@
+/*
+ * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
+ * Author:Mark Yao <mark.yao@rock-chips.com>
+ *
+ * based on exynos_drm_drv.c
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <asm/dma-iommu.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <linux/dma-mapping.h>
+#include <linux/pm_runtime.h>
+#include <linux/of_graph.h>
+#include <linux/component.h>
+
+#include "rockchip_drm_drv.h"
+#include "rockchip_drm_fb.h"
+#include "rockchip_drm_fbdev.h"
+#include "rockchip_drm_gem.h"
+
+#define DRIVER_NAME     "rockchip"
+#define DRIVER_DESC     "RockChip Soc DRM"
+#define DRIVER_DATE     "20140818"
+#define DRIVER_MAJOR    1
+#define DRIVER_MINOR    0
+
+/*
+ * Attach a (component) device to the shared drm dma mapping from master drm
+ * device.  This is used by the VOPs to map GEM buffers to a common DMA
+ * mapping.
+ */
+int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
+                                   struct device *dev)
+{
+        struct dma_iommu_mapping *mapping = drm_dev->dev->archdata.mapping;
+        int ret;
+
+        ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
+        if (ret)
+                return ret;
+
+        dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
+
+        return arm_iommu_attach_device(dev, mapping);
+}
+EXPORT_SYMBOL_GPL(rockchip_drm_dma_attach_device);
+
+void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
+                                    struct device *dev)
+{
+        arm_iommu_detach_device(dev);
+}
+EXPORT_SYMBOL_GPL(rockchip_drm_dma_detach_device);
+
+int rockchip_register_crtc_funcs(struct drm_device *dev,
+                                 const struct rockchip_crtc_funcs *crtc_funcs,
+                                 int pipe)
+{
+        struct rockchip_drm_private *priv = dev->dev_private;
+
+        if (pipe > ROCKCHIP_MAX_CRTC)
+                return -EINVAL;
+
+        priv->crtc_funcs[pipe] = crtc_funcs;
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(rockchip_register_crtc_funcs);
+
+void rockchip_unregister_crtc_funcs(struct drm_device *dev, int pipe)
+{
+        struct rockchip_drm_private *priv = dev->dev_private;
+
+        if (pipe > ROCKCHIP_MAX_CRTC)
+                return;
+
+        priv->crtc_funcs[pipe] = NULL;
+}
+EXPORT_SYMBOL_GPL(rockchip_unregister_crtc_funcs);
+
+static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm,
+                                                int pipe)
+{
+        struct drm_crtc *crtc;
+        int i = 0;
+
+        list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
+                if (i++ == pipe)
+                        return crtc;
+
+        return NULL;
+}
+
+static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev, int pipe)
+{
+        struct rockchip_drm_private *priv = dev->dev_private;
+        struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
+
+        if (crtc && priv->crtc_funcs[pipe] &&
+            priv->crtc_funcs[pipe]->enable_vblank)
+                return priv->crtc_funcs[pipe]->enable_vblank(crtc);
+
+        return 0;
+}
+
+static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev, int pipe)
+{
+        struct rockchip_drm_private *priv = dev->dev_private;
+        struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
+
+        if (crtc && priv->crtc_funcs[pipe] &&
+            priv->crtc_funcs[pipe]->enable_vblank)
+                priv->crtc_funcs[pipe]->disable_vblank(crtc);
+}
+
+static int rockchip_drm_load(struct drm_device *drm_dev, unsigned long flags)
+{
+        struct rockchip_drm_private *private;
+        struct dma_iommu_mapping *mapping;
+        struct device *dev = drm_dev->dev;
+        int ret;
+
+        private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
+        if (!private)
+                return -ENOMEM;
+
+        drm_dev->dev_private = private;
+
+        drm_mode_config_init(drm_dev);
+
+        rockchip_drm_mode_config_init(drm_dev);
+
+        dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
+                                      GFP_KERNEL);
+        if (!dev->dma_parms) {
+                ret = -ENOMEM;
+                goto err_config_cleanup;
+        }
+
+        /* TODO(djkurtz): fetch the mapping start/size from somewhere */
+        mapping = arm_iommu_create_mapping(&platform_bus_type, 0x00000000,
+                                           SZ_2G);
+        if (IS_ERR(mapping)) {
+                ret = PTR_ERR(mapping);
+                goto err_config_cleanup;
+        }
+
+        ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
+        if (ret)
+                goto err_release_mapping;
+
+        dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
+
+        ret = arm_iommu_attach_device(dev, mapping);
+        if (ret)
+                goto err_release_mapping;
+
+        /* Try to bind all sub drivers. */
+        ret = component_bind_all(dev, drm_dev);
+        if (ret)
+                goto err_detach_device;
+
+        /* init kms poll for handling hpd */
+        drm_kms_helper_poll_init(drm_dev);
+
+        /*
+         * enable drm irq mode.
+         * - with irq_enabled = true, we can use the vblank feature.
+         */
+        drm_dev->irq_enabled = true;
+
+        ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC);
+        if (ret)
+                goto err_kms_helper_poll_fini;
+
+        /*
+         * with vblank_disable_allowed = true, vblank interrupt will be disabled
+         * by drm timer once a current process gives up ownership of
+         * vblank event.(after drm_vblank_put function is called)
+         */
+        drm_dev->vblank_disable_allowed = true;
+
+        ret = rockchip_drm_fbdev_init(drm_dev);
+        if (ret)
+                goto err_vblank_cleanup;
+
+        return 0;
+err_vblank_cleanup:
+        drm_vblank_cleanup(drm_dev);
+err_kms_helper_poll_fini:
+        drm_kms_helper_poll_fini(drm_dev);
+        component_unbind_all(dev, drm_dev);
+err_detach_device:
+        arm_iommu_detach_device(dev);
+err_release_mapping:
+        arm_iommu_release_mapping(dev->archdata.mapping);
+err_config_cleanup:
+        drm_mode_config_cleanup(drm_dev);
+        drm_dev->dev_private = NULL;
+        return ret;
+}
+
+static int rockchip_drm_unload(struct drm_device *drm_dev)
+{
+        struct device *dev = drm_dev->dev;
+
+        rockchip_drm_fbdev_fini(drm_dev);
+        drm_vblank_cleanup(drm_dev);
+        drm_kms_helper_poll_fini(drm_dev);
+        component_unbind_all(dev, drm_dev);
+        arm_iommu_detach_device(dev);
+        arm_iommu_release_mapping(dev->archdata.mapping);
+        drm_mode_config_cleanup(drm_dev);
+        drm_dev->dev_private = NULL;
+
+        return 0;
+}
+
+void rockchip_drm_lastclose(struct drm_device *dev)
+{
+        struct rockchip_drm_private *priv = dev->dev_private;
+
+        drm_fb_helper_restore_fbdev_mode_unlocked(&priv->fbdev_helper);
+}
+
+static const struct file_operations rockchip_drm_driver_fops = {
+        .owner = THIS_MODULE,
+        .open = drm_open,
+        .mmap = rockchip_gem_mmap,
+        .poll = drm_poll,
+        .read = drm_read,
+        .unlocked_ioctl = drm_ioctl,
+#ifdef CONFIG_COMPAT
+        .compat_ioctl = drm_compat_ioctl,
+#endif
+        .release = drm_release,
+};
+
+const struct vm_operations_struct rockchip_drm_vm_ops = {
+        .open = drm_gem_vm_open,
+        .close = drm_gem_vm_close,
+};
+
+static struct drm_driver rockchip_drm_driver = {
+        .driver_features        = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
+        .load                   = rockchip_drm_load,
+        .unload                 = rockchip_drm_unload,
+        .lastclose              = rockchip_drm_lastclose,
+        .get_vblank_counter     = drm_vblank_count,
+        .enable_vblank          = rockchip_drm_crtc_enable_vblank,
+        .disable_vblank         = rockchip_drm_crtc_disable_vblank,
+        .gem_vm_ops             = &rockchip_drm_vm_ops,
+        .gem_free_object        = rockchip_gem_free_object,
+        .dumb_create            = rockchip_gem_dumb_create,
+        .dumb_map_offset        = rockchip_gem_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_import       = drm_gem_prime_import,
+        .gem_prime_export       = drm_gem_prime_export,
+        .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
+        .gem_prime_vmap         = rockchip_gem_prime_vmap,
+        .gem_prime_vunmap       = rockchip_gem_prime_vunmap,
+        .gem_prime_mmap         = rockchip_gem_mmap_buf,
+        .fops                   = &rockchip_drm_driver_fops,
+        .name   = DRIVER_NAME,
+        .desc   = DRIVER_DESC,
+        .date   = DRIVER_DATE,
+        .major  = DRIVER_MAJOR,
+        .minor  = DRIVER_MINOR,
+};
+
+#ifdef CONFIG_PM_SLEEP
+static int rockchip_drm_sys_suspend(struct device *dev)
+{
+        struct drm_device *drm = dev_get_drvdata(dev);
+        struct drm_connector *connector;
+
+        if (!drm)
+                return 0;
+
+        drm_modeset_lock_all(drm);
+        list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
+                int old_dpms = connector->dpms;
+
+                if (connector->funcs->dpms)
+                        connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
+
+                /* Set the old mode back to the connector for resume */
+                connector->dpms = old_dpms;
+        }
+        drm_modeset_unlock_all(drm);
+
+        return 0;
+}
+
+static int rockchip_drm_sys_resume(struct device *dev)
+{
+        struct drm_device *drm = dev_get_drvdata(dev);
+        struct drm_connector *connector;
+        enum drm_connector_status status;
+        bool changed = false;
+
+        if (!drm)
+                return 0;
+
+        drm_modeset_lock_all(drm);
+        list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
+                int desired_mode = connector->dpms;
+
+                /*
+                 * at suspend time, we save dpms to connector->dpms,
+                 * restore the old_dpms, and at current time, the connector
+                 * dpms status must be DRM_MODE_DPMS_OFF.
+                 */
+                connector->dpms = DRM_MODE_DPMS_OFF;
+
+                /*
+                 * If the connector has been disconnected during suspend,
+                 * disconnect it from the encoder and leave it off. We'll notify
+                 * userspace at the end.
+                 */
+                if (desired_mode == DRM_MODE_DPMS_ON) {
+                        status = connector->funcs->detect(connector, true);
+                        if (status == connector_status_disconnected) {
+                                connector->encoder = NULL;
+                                connector->status = status;
+                                changed = true;
+                                continue;
+                        }
+                }
+                if (connector->funcs->dpms)
+                        connector->funcs->dpms(connector, desired_mode);
+        }
+        drm_modeset_unlock_all(drm);
+
+        drm_helper_resume_force_mode(drm);
+
+        if (changed)
+                drm_kms_helper_hotplug_event(drm);
+
+        return 0;
+}
+#endif
+
+static const struct dev_pm_ops rockchip_drm_pm_ops = {
+        SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
+                                rockchip_drm_sys_resume)
+};
+
+/*
+ * @node: device tree node containing encoder input ports
+ * @encoder: drm_encoder
+ */
+int rockchip_drm_encoder_get_mux_id(struct device_node *node,
+                                    struct drm_encoder *encoder)
+{
+        struct device_node *ep = NULL;
+        struct drm_crtc *crtc = encoder->crtc;
+        struct of_endpoint endpoint;
+        struct device_node *port;
+        int ret;
+
+        if (!node || !crtc)
+                return -EINVAL;
+
+        do {
+                ep = of_graph_get_next_endpoint(node, ep);
+                if (!ep)
+                        break;
+
+                port = of_graph_get_remote_port(ep);
+                of_node_put(port);
+                if (port == crtc->port) {
+                        ret = of_graph_parse_endpoint(ep, &endpoint);
+                        return ret ?: endpoint.id;
+                }
+        } while (ep);
+
+        return -EINVAL;
+}
+
+static int compare_of(struct device *dev, void *data)
+{
+        struct device_node *np = data;
+
+        return dev->of_node == np;
+}
+
+static void rockchip_add_endpoints(struct device *dev,
+                                   struct component_match **match,
+                                   struct device_node *port)
+{
+        struct device_node *ep, *remote;
+
+        for_each_child_of_node(port, ep) {
+                remote = of_graph_get_remote_port_parent(ep);
+                if (!remote || !of_device_is_available(remote)) {
+                        of_node_put(remote);
+                        continue;
+                } else if (!of_device_is_available(remote->parent)) {
+                        dev_warn(dev, "parent device of %s is not available\n",
+                                 remote->full_name);
+                        of_node_put(remote);
+                        continue;
+                }
+
+                component_match_add(dev, match, compare_of, remote);
+                of_node_put(remote);
+        }
+}
+
+static int rockchip_drm_bind(struct device *dev)
+{
+        struct drm_device *drm;
+        int ret;
+
+        drm = drm_dev_alloc(&rockchip_drm_driver, dev);
+        if (!drm)
+                return -ENOMEM;
+
+        ret = drm_dev_set_unique(drm, "%s", dev_name(dev));
+        if (ret)
+                goto err_free;
+
+        ret = drm_dev_register(drm, 0);
+        if (ret)
+                goto err_free;
+
+        dev_set_drvdata(dev, drm);
+
+        return 0;
+
+err_free:
+        drm_dev_unref(drm);
+        return ret;
+}
+
+static void rockchip_drm_unbind(struct device *dev)
+{
+        struct drm_device *drm = dev_get_drvdata(dev);
+
+        drm_dev_unregister(drm);
+        drm_dev_unref(drm);
+        dev_set_drvdata(dev, NULL);
+}
+
+static const struct component_master_ops rockchip_drm_ops = {
+        .bind = rockchip_drm_bind,
+        .unbind = rockchip_drm_unbind,
+};
+
+static int rockchip_drm_platform_probe(struct platform_device *pdev)
+{
+        struct device *dev = &pdev->dev;
+        struct component_match *match = NULL;
+        struct device_node *np = dev->of_node;
+        struct device_node *port;
+        int i;
+
+        if (!np)
+                return -ENODEV;
+        /*
+         * Bind the crtc ports first, so that
+         * drm_of_find_possible_crtcs called from encoder .bind callbacks
+         * works as expected.
+         */
+        for (i = 0;; i++) {
+                port = of_parse_phandle(np, "ports", i);
+                if (!port)
+                        break;
+
+                if (!of_device_is_available(port->parent)) {
+                        of_node_put(port);
+                        continue;
+                }
+
+                component_match_add(dev, &match, compare_of, port->parent);
+                of_node_put(port);
+        }
+
+        if (i == 0) {
+                dev_err(dev, "missing 'ports' property\n");
+                return -ENODEV;
+        }
+
+        if (!match) {
+                dev_err(dev, "No available vop found for display-subsystem.\n");
+                return -ENODEV;
+        }
+        /*
+         * For each bound crtc, bind the encoders attached to its
+         * remote endpoint.
+         */
+        for (i = 0;; i++) {
+                port = of_parse_phandle(np, "ports", i);
+                if (!port)
+                        break;
+
+                if (!of_device_is_available(port->parent)) {
+                        of_node_put(port);
+                        continue;
+                }
+
+                rockchip_add_endpoints(dev, &match, port);
+                of_node_put(port);
+        }
+
+        return component_master_add_with_match(dev, &rockchip_drm_ops, match);
+}
+
+static int rockchip_drm_platform_remove(struct platform_device *pdev)
+{
+        component_master_del(&pdev->dev, &rockchip_drm_ops);
+
+        return 0;
+}
+
+static const struct of_device_id rockchip_drm_dt_ids[] = {
+        { .compatible = "rockchip,display-subsystem", },
+        { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
+
+static struct platform_driver rockchip_drm_platform_driver = {
+        .probe = rockchip_drm_platform_probe,
+        .remove = rockchip_drm_platform_remove,
+        .driver = {
+                .owner = THIS_MODULE,
+                .name = "rockchip-drm",
+                .of_match_table = rockchip_drm_dt_ids,
+                .pm = &rockchip_drm_pm_ops,
+        },
+};
+
+module_platform_driver(rockchip_drm_platform_driver);
+
+MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
+MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
+MODULE_LICENSE("GPL v2");