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- /*
- * 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/module.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,
- unsigned 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,
- unsigned 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;
- struct drm_connector *connector;
- 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;
- /*
- * All components are now added, we can publish the connector sysfs
- * entries to userspace. This will generate hotplug events and so
- * userspace will expect to be able to access DRM at this point.
- */
- list_for_each_entry(connector, &drm_dev->mode_config.connector_list,
- head) {
- ret = drm_connector_register(connector);
- if (ret) {
- dev_err(drm_dev->dev,
- "[CONNECTOR:%d:%s] drm_connector_register failed: %d\n",
- connector->base.id,
- connector->name, ret);
- goto err_unbind;
- }
- }
- /* 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);
- err_unbind:
- 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_no_hw_counter,
- .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;
- struct drm_crtc *crtc = encoder->crtc;
- struct of_endpoint endpoint;
- struct device_node *port;
- int ret;
- if (!node || !crtc)
- return -EINVAL;
- for_each_endpoint_of_node(node, ep) {
- port = of_graph_get_remote_port(ep);
- of_node_put(port);
- if (port == crtc->port) {
- ret = of_graph_parse_endpoint(ep, &endpoint);
- of_node_put(ep);
- return ret ?: endpoint.id;
- }
- }
- return -EINVAL;
- }
- EXPORT_SYMBOL_GPL(rockchip_drm_encoder_get_mux_id);
- 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 = {
- .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");
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