2 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
3 * Author:Mark Yao <mark.yao@rock-chips.com>
5 * based on exynos_drm_drv.c
7 * This software is licensed under the terms of the GNU General Public
8 * License version 2, as published by the Free Software Foundation, and
9 * may be copied, distributed, and modified under those terms.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
17 #include <asm/dma-iommu.h>
20 #include <drm/drm_crtc_helper.h>
21 #include <drm/drm_fb_helper.h>
22 #include <linux/dma-mapping.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/module.h>
25 #include <linux/of_graph.h>
26 #include <linux/component.h>
28 #include "rockchip_drm_drv.h"
29 #include "rockchip_drm_fb.h"
30 #include "rockchip_drm_fbdev.h"
31 #include "rockchip_drm_gem.h"
33 #define DRIVER_NAME "rockchip"
34 #define DRIVER_DESC "RockChip Soc DRM"
35 #define DRIVER_DATE "20140818"
36 #define DRIVER_MAJOR 1
37 #define DRIVER_MINOR 0
40 * Attach a (component) device to the shared drm dma mapping from master drm
41 * device. This is used by the VOPs to map GEM buffers to a common DMA
44 int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
47 struct dma_iommu_mapping *mapping = drm_dev->dev->archdata.mapping;
50 ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
54 dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
56 return arm_iommu_attach_device(dev, mapping);
58 EXPORT_SYMBOL_GPL(rockchip_drm_dma_attach_device);
60 void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
63 arm_iommu_detach_device(dev);
65 EXPORT_SYMBOL_GPL(rockchip_drm_dma_detach_device);
67 int rockchip_register_crtc_funcs(struct drm_crtc *crtc,
68 const struct rockchip_crtc_funcs *crtc_funcs)
70 int pipe = drm_crtc_index(crtc);
71 struct rockchip_drm_private *priv = crtc->dev->dev_private;
73 if (pipe > ROCKCHIP_MAX_CRTC)
76 priv->crtc_funcs[pipe] = crtc_funcs;
80 EXPORT_SYMBOL_GPL(rockchip_register_crtc_funcs);
82 void rockchip_unregister_crtc_funcs(struct drm_crtc *crtc)
84 int pipe = drm_crtc_index(crtc);
85 struct rockchip_drm_private *priv = crtc->dev->dev_private;
87 if (pipe > ROCKCHIP_MAX_CRTC)
90 priv->crtc_funcs[pipe] = NULL;
92 EXPORT_SYMBOL_GPL(rockchip_unregister_crtc_funcs);
94 static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm,
97 struct drm_crtc *crtc;
100 list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
107 static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev,
110 struct rockchip_drm_private *priv = dev->dev_private;
111 struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
113 if (crtc && priv->crtc_funcs[pipe] &&
114 priv->crtc_funcs[pipe]->enable_vblank)
115 return priv->crtc_funcs[pipe]->enable_vblank(crtc);
120 static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev,
123 struct rockchip_drm_private *priv = dev->dev_private;
124 struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
126 if (crtc && priv->crtc_funcs[pipe] &&
127 priv->crtc_funcs[pipe]->enable_vblank)
128 priv->crtc_funcs[pipe]->disable_vblank(crtc);
131 static int rockchip_drm_load(struct drm_device *drm_dev, unsigned long flags)
133 struct rockchip_drm_private *private;
134 struct dma_iommu_mapping *mapping;
135 struct device *dev = drm_dev->dev;
136 struct drm_connector *connector;
139 private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
143 mutex_init(&private->commit.lock);
144 INIT_WORK(&private->commit.work, rockchip_drm_atomic_work);
146 drm_dev->dev_private = private;
148 drm_mode_config_init(drm_dev);
150 rockchip_drm_mode_config_init(drm_dev);
152 dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
154 if (!dev->dma_parms) {
156 goto err_config_cleanup;
159 /* TODO(djkurtz): fetch the mapping start/size from somewhere */
160 mapping = arm_iommu_create_mapping(&platform_bus_type, 0x00000000,
162 if (IS_ERR(mapping)) {
163 ret = PTR_ERR(mapping);
164 goto err_config_cleanup;
167 ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
169 goto err_release_mapping;
171 dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
173 ret = arm_iommu_attach_device(dev, mapping);
175 goto err_release_mapping;
177 /* Try to bind all sub drivers. */
178 ret = component_bind_all(dev, drm_dev);
180 goto err_detach_device;
183 * All components are now added, we can publish the connector sysfs
184 * entries to userspace. This will generate hotplug events and so
185 * userspace will expect to be able to access DRM at this point.
187 list_for_each_entry(connector, &drm_dev->mode_config.connector_list,
189 ret = drm_connector_register(connector);
191 dev_err(drm_dev->dev,
192 "[CONNECTOR:%d:%s] drm_connector_register failed: %d\n",
194 connector->name, ret);
199 /* init kms poll for handling hpd */
200 drm_kms_helper_poll_init(drm_dev);
203 * enable drm irq mode.
204 * - with irq_enabled = true, we can use the vblank feature.
206 drm_dev->irq_enabled = true;
208 ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC);
210 goto err_kms_helper_poll_fini;
213 * with vblank_disable_allowed = true, vblank interrupt will be disabled
214 * by drm timer once a current process gives up ownership of
215 * vblank event.(after drm_vblank_put function is called)
217 drm_dev->vblank_disable_allowed = true;
219 drm_mode_config_reset(drm_dev);
221 ret = rockchip_drm_fbdev_init(drm_dev);
223 goto err_vblank_cleanup;
227 drm_vblank_cleanup(drm_dev);
228 err_kms_helper_poll_fini:
229 drm_kms_helper_poll_fini(drm_dev);
231 component_unbind_all(dev, drm_dev);
233 arm_iommu_detach_device(dev);
235 arm_iommu_release_mapping(dev->archdata.mapping);
237 drm_mode_config_cleanup(drm_dev);
238 drm_dev->dev_private = NULL;
242 static int rockchip_drm_unload(struct drm_device *drm_dev)
244 struct device *dev = drm_dev->dev;
246 rockchip_drm_fbdev_fini(drm_dev);
247 drm_vblank_cleanup(drm_dev);
248 drm_kms_helper_poll_fini(drm_dev);
249 component_unbind_all(dev, drm_dev);
250 arm_iommu_detach_device(dev);
251 arm_iommu_release_mapping(dev->archdata.mapping);
252 drm_mode_config_cleanup(drm_dev);
253 drm_dev->dev_private = NULL;
258 void rockchip_drm_lastclose(struct drm_device *dev)
260 struct rockchip_drm_private *priv = dev->dev_private;
262 drm_fb_helper_restore_fbdev_mode_unlocked(&priv->fbdev_helper);
265 static const struct file_operations rockchip_drm_driver_fops = {
266 .owner = THIS_MODULE,
268 .mmap = rockchip_gem_mmap,
271 .unlocked_ioctl = drm_ioctl,
273 .compat_ioctl = drm_compat_ioctl,
275 .release = drm_release,
278 const struct vm_operations_struct rockchip_drm_vm_ops = {
279 .open = drm_gem_vm_open,
280 .close = drm_gem_vm_close,
283 static struct drm_driver rockchip_drm_driver = {
284 .driver_features = DRIVER_MODESET | DRIVER_GEM |
285 DRIVER_PRIME | DRIVER_ATOMIC,
286 .load = rockchip_drm_load,
287 .unload = rockchip_drm_unload,
288 .lastclose = rockchip_drm_lastclose,
289 .get_vblank_counter = drm_vblank_no_hw_counter,
290 .enable_vblank = rockchip_drm_crtc_enable_vblank,
291 .disable_vblank = rockchip_drm_crtc_disable_vblank,
292 .gem_vm_ops = &rockchip_drm_vm_ops,
293 .gem_free_object = rockchip_gem_free_object,
294 .dumb_create = rockchip_gem_dumb_create,
295 .dumb_map_offset = rockchip_gem_dumb_map_offset,
296 .dumb_destroy = drm_gem_dumb_destroy,
297 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
298 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
299 .gem_prime_import = drm_gem_prime_import,
300 .gem_prime_export = drm_gem_prime_export,
301 .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
302 .gem_prime_vmap = rockchip_gem_prime_vmap,
303 .gem_prime_vunmap = rockchip_gem_prime_vunmap,
304 .gem_prime_mmap = rockchip_gem_mmap_buf,
305 .fops = &rockchip_drm_driver_fops,
309 .major = DRIVER_MAJOR,
310 .minor = DRIVER_MINOR,
313 #ifdef CONFIG_PM_SLEEP
314 static int rockchip_drm_sys_suspend(struct device *dev)
316 struct drm_device *drm = dev_get_drvdata(dev);
317 struct drm_connector *connector;
322 drm_modeset_lock_all(drm);
323 list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
324 int old_dpms = connector->dpms;
326 if (connector->funcs->dpms)
327 connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
329 /* Set the old mode back to the connector for resume */
330 connector->dpms = old_dpms;
332 drm_modeset_unlock_all(drm);
337 static int rockchip_drm_sys_resume(struct device *dev)
339 struct drm_device *drm = dev_get_drvdata(dev);
340 struct drm_connector *connector;
341 enum drm_connector_status status;
342 bool changed = false;
347 drm_modeset_lock_all(drm);
348 list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
349 int desired_mode = connector->dpms;
352 * at suspend time, we save dpms to connector->dpms,
353 * restore the old_dpms, and at current time, the connector
354 * dpms status must be DRM_MODE_DPMS_OFF.
356 connector->dpms = DRM_MODE_DPMS_OFF;
359 * If the connector has been disconnected during suspend,
360 * disconnect it from the encoder and leave it off. We'll notify
361 * userspace at the end.
363 if (desired_mode == DRM_MODE_DPMS_ON) {
364 status = connector->funcs->detect(connector, true);
365 if (status == connector_status_disconnected) {
366 connector->encoder = NULL;
367 connector->status = status;
372 if (connector->funcs->dpms)
373 connector->funcs->dpms(connector, desired_mode);
375 drm_modeset_unlock_all(drm);
377 drm_helper_resume_force_mode(drm);
380 drm_kms_helper_hotplug_event(drm);
386 static const struct dev_pm_ops rockchip_drm_pm_ops = {
387 SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
388 rockchip_drm_sys_resume)
392 * @node: device tree node containing encoder input ports
393 * @encoder: drm_encoder
395 int rockchip_drm_encoder_get_mux_id(struct device_node *node,
396 struct drm_encoder *encoder)
398 struct device_node *ep;
399 struct drm_crtc *crtc = encoder->crtc;
400 struct of_endpoint endpoint;
401 struct device_node *port;
407 for_each_endpoint_of_node(node, ep) {
408 port = of_graph_get_remote_port(ep);
410 if (port == crtc->port) {
411 ret = of_graph_parse_endpoint(ep, &endpoint);
413 return ret ?: endpoint.id;
419 EXPORT_SYMBOL_GPL(rockchip_drm_encoder_get_mux_id);
421 static int compare_of(struct device *dev, void *data)
423 struct device_node *np = data;
425 return dev->of_node == np;
428 static void rockchip_add_endpoints(struct device *dev,
429 struct component_match **match,
430 struct device_node *port)
432 struct device_node *ep, *remote;
434 for_each_child_of_node(port, ep) {
435 remote = of_graph_get_remote_port_parent(ep);
436 if (!remote || !of_device_is_available(remote)) {
439 } else if (!of_device_is_available(remote->parent)) {
440 dev_warn(dev, "parent device of %s is not available\n",
446 component_match_add(dev, match, compare_of, remote);
451 static int rockchip_drm_bind(struct device *dev)
453 struct drm_device *drm;
456 drm = drm_dev_alloc(&rockchip_drm_driver, dev);
460 ret = drm_dev_set_unique(drm, "%s", dev_name(dev));
464 ret = drm_dev_register(drm, 0);
468 dev_set_drvdata(dev, drm);
477 static void rockchip_drm_unbind(struct device *dev)
479 struct drm_device *drm = dev_get_drvdata(dev);
481 drm_dev_unregister(drm);
483 dev_set_drvdata(dev, NULL);
486 static const struct component_master_ops rockchip_drm_ops = {
487 .bind = rockchip_drm_bind,
488 .unbind = rockchip_drm_unbind,
491 static int rockchip_drm_platform_probe(struct platform_device *pdev)
493 struct device *dev = &pdev->dev;
494 struct component_match *match = NULL;
495 struct device_node *np = dev->of_node;
496 struct device_node *port;
502 * Bind the crtc ports first, so that
503 * drm_of_find_possible_crtcs called from encoder .bind callbacks
507 port = of_parse_phandle(np, "ports", i);
511 if (!of_device_is_available(port->parent)) {
516 component_match_add(dev, &match, compare_of, port->parent);
521 dev_err(dev, "missing 'ports' property\n");
526 dev_err(dev, "No available vop found for display-subsystem.\n");
530 * For each bound crtc, bind the encoders attached to its
534 port = of_parse_phandle(np, "ports", i);
538 if (!of_device_is_available(port->parent)) {
543 rockchip_add_endpoints(dev, &match, port);
547 return component_master_add_with_match(dev, &rockchip_drm_ops, match);
550 static int rockchip_drm_platform_remove(struct platform_device *pdev)
552 component_master_del(&pdev->dev, &rockchip_drm_ops);
557 static const struct of_device_id rockchip_drm_dt_ids[] = {
558 { .compatible = "rockchip,display-subsystem", },
561 MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
563 static struct platform_driver rockchip_drm_platform_driver = {
564 .probe = rockchip_drm_platform_probe,
565 .remove = rockchip_drm_platform_remove,
567 .name = "rockchip-drm",
568 .of_match_table = rockchip_drm_dt_ids,
569 .pm = &rockchip_drm_pm_ops,
573 module_platform_driver(rockchip_drm_platform_driver);
575 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
576 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
577 MODULE_LICENSE("GPL v2");