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);
59 void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
62 arm_iommu_detach_device(dev);
65 int rockchip_register_crtc_funcs(struct drm_crtc *crtc,
66 const struct rockchip_crtc_funcs *crtc_funcs)
68 int pipe = drm_crtc_index(crtc);
69 struct rockchip_drm_private *priv = crtc->dev->dev_private;
71 if (pipe > ROCKCHIP_MAX_CRTC)
74 priv->crtc_funcs[pipe] = crtc_funcs;
79 void rockchip_unregister_crtc_funcs(struct drm_crtc *crtc)
81 int pipe = drm_crtc_index(crtc);
82 struct rockchip_drm_private *priv = crtc->dev->dev_private;
84 if (pipe > ROCKCHIP_MAX_CRTC)
87 priv->crtc_funcs[pipe] = NULL;
90 static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm,
93 struct drm_crtc *crtc;
96 list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
103 static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev,
106 struct rockchip_drm_private *priv = dev->dev_private;
107 struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
109 if (crtc && priv->crtc_funcs[pipe] &&
110 priv->crtc_funcs[pipe]->enable_vblank)
111 return priv->crtc_funcs[pipe]->enable_vblank(crtc);
116 static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev,
119 struct rockchip_drm_private *priv = dev->dev_private;
120 struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
122 if (crtc && priv->crtc_funcs[pipe] &&
123 priv->crtc_funcs[pipe]->enable_vblank)
124 priv->crtc_funcs[pipe]->disable_vblank(crtc);
127 static int rockchip_drm_load(struct drm_device *drm_dev, unsigned long flags)
129 struct rockchip_drm_private *private;
130 struct dma_iommu_mapping *mapping;
131 struct device *dev = drm_dev->dev;
132 struct drm_connector *connector;
135 private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
139 mutex_init(&private->commit.lock);
140 INIT_WORK(&private->commit.work, rockchip_drm_atomic_work);
142 drm_dev->dev_private = private;
144 drm_mode_config_init(drm_dev);
146 rockchip_drm_mode_config_init(drm_dev);
148 dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
150 if (!dev->dma_parms) {
152 goto err_config_cleanup;
155 /* TODO(djkurtz): fetch the mapping start/size from somewhere */
156 mapping = arm_iommu_create_mapping(&platform_bus_type, 0x00000000,
158 if (IS_ERR(mapping)) {
159 ret = PTR_ERR(mapping);
160 goto err_config_cleanup;
163 ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
165 goto err_release_mapping;
167 dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
169 ret = arm_iommu_attach_device(dev, mapping);
171 goto err_release_mapping;
173 /* Try to bind all sub drivers. */
174 ret = component_bind_all(dev, drm_dev);
176 goto err_detach_device;
179 * All components are now added, we can publish the connector sysfs
180 * entries to userspace. This will generate hotplug events and so
181 * userspace will expect to be able to access DRM at this point.
183 list_for_each_entry(connector, &drm_dev->mode_config.connector_list,
185 ret = drm_connector_register(connector);
187 dev_err(drm_dev->dev,
188 "[CONNECTOR:%d:%s] drm_connector_register failed: %d\n",
190 connector->name, ret);
195 /* init kms poll for handling hpd */
196 drm_kms_helper_poll_init(drm_dev);
199 * enable drm irq mode.
200 * - with irq_enabled = true, we can use the vblank feature.
202 drm_dev->irq_enabled = true;
204 ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC);
206 goto err_kms_helper_poll_fini;
209 * with vblank_disable_allowed = true, vblank interrupt will be disabled
210 * by drm timer once a current process gives up ownership of
211 * vblank event.(after drm_vblank_put function is called)
213 drm_dev->vblank_disable_allowed = true;
215 drm_mode_config_reset(drm_dev);
217 ret = rockchip_drm_fbdev_init(drm_dev);
219 goto err_vblank_cleanup;
223 drm_vblank_cleanup(drm_dev);
224 err_kms_helper_poll_fini:
225 drm_kms_helper_poll_fini(drm_dev);
227 component_unbind_all(dev, drm_dev);
229 arm_iommu_detach_device(dev);
231 arm_iommu_release_mapping(dev->archdata.mapping);
233 drm_mode_config_cleanup(drm_dev);
234 drm_dev->dev_private = NULL;
238 static int rockchip_drm_unload(struct drm_device *drm_dev)
240 struct device *dev = drm_dev->dev;
242 rockchip_drm_fbdev_fini(drm_dev);
243 drm_vblank_cleanup(drm_dev);
244 drm_kms_helper_poll_fini(drm_dev);
245 component_unbind_all(dev, drm_dev);
246 arm_iommu_detach_device(dev);
247 arm_iommu_release_mapping(dev->archdata.mapping);
248 drm_mode_config_cleanup(drm_dev);
249 drm_dev->dev_private = NULL;
254 static void rockchip_drm_crtc_cancel_pending_vblank(struct drm_crtc *crtc,
255 struct drm_file *file_priv)
257 struct rockchip_drm_private *priv = crtc->dev->dev_private;
258 int pipe = drm_crtc_index(crtc);
260 if (pipe < ROCKCHIP_MAX_CRTC &&
261 priv->crtc_funcs[pipe] &&
262 priv->crtc_funcs[pipe]->cancel_pending_vblank)
263 priv->crtc_funcs[pipe]->cancel_pending_vblank(crtc, file_priv);
266 static void rockchip_drm_preclose(struct drm_device *dev,
267 struct drm_file *file_priv)
269 struct drm_crtc *crtc;
271 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
272 rockchip_drm_crtc_cancel_pending_vblank(crtc, file_priv);
275 void rockchip_drm_lastclose(struct drm_device *dev)
277 struct rockchip_drm_private *priv = dev->dev_private;
279 drm_fb_helper_restore_fbdev_mode_unlocked(&priv->fbdev_helper);
282 static const struct file_operations rockchip_drm_driver_fops = {
283 .owner = THIS_MODULE,
285 .mmap = rockchip_gem_mmap,
288 .unlocked_ioctl = drm_ioctl,
290 .compat_ioctl = drm_compat_ioctl,
292 .release = drm_release,
295 const struct vm_operations_struct rockchip_drm_vm_ops = {
296 .open = drm_gem_vm_open,
297 .close = drm_gem_vm_close,
300 static struct drm_driver rockchip_drm_driver = {
301 .driver_features = DRIVER_MODESET | DRIVER_GEM |
302 DRIVER_PRIME | DRIVER_ATOMIC,
303 .load = rockchip_drm_load,
304 .unload = rockchip_drm_unload,
305 .preclose = rockchip_drm_preclose,
306 .lastclose = rockchip_drm_lastclose,
307 .get_vblank_counter = drm_vblank_no_hw_counter,
308 .enable_vblank = rockchip_drm_crtc_enable_vblank,
309 .disable_vblank = rockchip_drm_crtc_disable_vblank,
310 .gem_vm_ops = &rockchip_drm_vm_ops,
311 .gem_free_object = rockchip_gem_free_object,
312 .dumb_create = rockchip_gem_dumb_create,
313 .dumb_map_offset = rockchip_gem_dumb_map_offset,
314 .dumb_destroy = drm_gem_dumb_destroy,
315 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
316 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
317 .gem_prime_import = drm_gem_prime_import,
318 .gem_prime_export = drm_gem_prime_export,
319 .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
320 .gem_prime_vmap = rockchip_gem_prime_vmap,
321 .gem_prime_vunmap = rockchip_gem_prime_vunmap,
322 .gem_prime_mmap = rockchip_gem_mmap_buf,
323 .fops = &rockchip_drm_driver_fops,
327 .major = DRIVER_MAJOR,
328 .minor = DRIVER_MINOR,
331 #ifdef CONFIG_PM_SLEEP
332 static int rockchip_drm_sys_suspend(struct device *dev)
334 struct drm_device *drm = dev_get_drvdata(dev);
335 struct drm_connector *connector;
340 drm_modeset_lock_all(drm);
341 list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
342 int old_dpms = connector->dpms;
344 if (connector->funcs->dpms)
345 connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
347 /* Set the old mode back to the connector for resume */
348 connector->dpms = old_dpms;
350 drm_modeset_unlock_all(drm);
355 static int rockchip_drm_sys_resume(struct device *dev)
357 struct drm_device *drm = dev_get_drvdata(dev);
358 struct drm_connector *connector;
359 enum drm_connector_status status;
360 bool changed = false;
365 drm_modeset_lock_all(drm);
366 list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
367 int desired_mode = connector->dpms;
370 * at suspend time, we save dpms to connector->dpms,
371 * restore the old_dpms, and at current time, the connector
372 * dpms status must be DRM_MODE_DPMS_OFF.
374 connector->dpms = DRM_MODE_DPMS_OFF;
377 * If the connector has been disconnected during suspend,
378 * disconnect it from the encoder and leave it off. We'll notify
379 * userspace at the end.
381 if (desired_mode == DRM_MODE_DPMS_ON) {
382 status = connector->funcs->detect(connector, true);
383 if (status == connector_status_disconnected) {
384 connector->encoder = NULL;
385 connector->status = status;
390 if (connector->funcs->dpms)
391 connector->funcs->dpms(connector, desired_mode);
393 drm_modeset_unlock_all(drm);
395 drm_helper_resume_force_mode(drm);
398 drm_kms_helper_hotplug_event(drm);
404 static const struct dev_pm_ops rockchip_drm_pm_ops = {
405 SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
406 rockchip_drm_sys_resume)
410 * @node: device tree node containing encoder input ports
411 * @encoder: drm_encoder
413 int rockchip_drm_encoder_get_mux_id(struct device_node *node,
414 struct drm_encoder *encoder)
416 struct device_node *ep;
417 struct drm_crtc *crtc = encoder->crtc;
418 struct of_endpoint endpoint;
419 struct device_node *port;
425 for_each_endpoint_of_node(node, ep) {
426 port = of_graph_get_remote_port(ep);
428 if (port == crtc->port) {
429 ret = of_graph_parse_endpoint(ep, &endpoint);
431 return ret ?: endpoint.id;
437 EXPORT_SYMBOL_GPL(rockchip_drm_encoder_get_mux_id);
439 static int compare_of(struct device *dev, void *data)
441 struct device_node *np = data;
443 return dev->of_node == np;
446 static void rockchip_add_endpoints(struct device *dev,
447 struct component_match **match,
448 struct device_node *port)
450 struct device_node *ep, *remote;
452 for_each_child_of_node(port, ep) {
453 remote = of_graph_get_remote_port_parent(ep);
454 if (!remote || !of_device_is_available(remote)) {
457 } else if (!of_device_is_available(remote->parent)) {
458 dev_warn(dev, "parent device of %s is not available\n",
464 component_match_add(dev, match, compare_of, remote);
469 static int rockchip_drm_bind(struct device *dev)
471 struct drm_device *drm;
474 drm = drm_dev_alloc(&rockchip_drm_driver, dev);
478 ret = drm_dev_set_unique(drm, "%s", dev_name(dev));
482 ret = drm_dev_register(drm, 0);
486 dev_set_drvdata(dev, drm);
495 static void rockchip_drm_unbind(struct device *dev)
497 struct drm_device *drm = dev_get_drvdata(dev);
499 drm_dev_unregister(drm);
501 dev_set_drvdata(dev, NULL);
504 static const struct component_master_ops rockchip_drm_ops = {
505 .bind = rockchip_drm_bind,
506 .unbind = rockchip_drm_unbind,
509 static int rockchip_drm_platform_probe(struct platform_device *pdev)
511 struct device *dev = &pdev->dev;
512 struct component_match *match = NULL;
513 struct device_node *np = dev->of_node;
514 struct device_node *port;
520 * Bind the crtc ports first, so that
521 * drm_of_find_possible_crtcs called from encoder .bind callbacks
525 port = of_parse_phandle(np, "ports", i);
529 if (!of_device_is_available(port->parent)) {
534 component_match_add(dev, &match, compare_of, port->parent);
539 dev_err(dev, "missing 'ports' property\n");
544 dev_err(dev, "No available vop found for display-subsystem.\n");
548 * For each bound crtc, bind the encoders attached to its
552 port = of_parse_phandle(np, "ports", i);
556 if (!of_device_is_available(port->parent)) {
561 rockchip_add_endpoints(dev, &match, port);
565 return component_master_add_with_match(dev, &rockchip_drm_ops, match);
568 static int rockchip_drm_platform_remove(struct platform_device *pdev)
570 component_master_del(&pdev->dev, &rockchip_drm_ops);
575 static const struct of_device_id rockchip_drm_dt_ids[] = {
576 { .compatible = "rockchip,display-subsystem", },
579 MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
581 static struct platform_driver rockchip_drm_platform_driver = {
582 .probe = rockchip_drm_platform_probe,
583 .remove = rockchip_drm_platform_remove,
585 .name = "rockchip-drm",
586 .of_match_table = rockchip_drm_dt_ids,
587 .pm = &rockchip_drm_pm_ops,
591 module_platform_driver(rockchip_drm_platform_driver);
593 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
594 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
595 MODULE_LICENSE("GPL v2");