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_device *dev,
68 const struct rockchip_crtc_funcs *crtc_funcs,
71 struct rockchip_drm_private *priv = 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_device *dev, int pipe)
84 struct rockchip_drm_private *priv = dev->dev_private;
86 if (pipe > ROCKCHIP_MAX_CRTC)
89 priv->crtc_funcs[pipe] = NULL;
91 EXPORT_SYMBOL_GPL(rockchip_unregister_crtc_funcs);
93 static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm,
96 struct drm_crtc *crtc;
99 list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
106 static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev,
109 struct rockchip_drm_private *priv = dev->dev_private;
110 struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
112 if (crtc && priv->crtc_funcs[pipe] &&
113 priv->crtc_funcs[pipe]->enable_vblank)
114 return priv->crtc_funcs[pipe]->enable_vblank(crtc);
119 static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev,
122 struct rockchip_drm_private *priv = dev->dev_private;
123 struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
125 if (crtc && priv->crtc_funcs[pipe] &&
126 priv->crtc_funcs[pipe]->enable_vblank)
127 priv->crtc_funcs[pipe]->disable_vblank(crtc);
130 static int rockchip_drm_load(struct drm_device *drm_dev, unsigned long flags)
132 struct rockchip_drm_private *private;
133 struct dma_iommu_mapping *mapping;
134 struct device *dev = drm_dev->dev;
135 struct drm_connector *connector;
138 private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
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 ret = rockchip_drm_fbdev_init(drm_dev);
217 goto err_vblank_cleanup;
221 drm_vblank_cleanup(drm_dev);
222 err_kms_helper_poll_fini:
223 drm_kms_helper_poll_fini(drm_dev);
225 component_unbind_all(dev, drm_dev);
227 arm_iommu_detach_device(dev);
229 arm_iommu_release_mapping(dev->archdata.mapping);
231 drm_mode_config_cleanup(drm_dev);
232 drm_dev->dev_private = NULL;
236 static int rockchip_drm_unload(struct drm_device *drm_dev)
238 struct device *dev = drm_dev->dev;
240 rockchip_drm_fbdev_fini(drm_dev);
241 drm_vblank_cleanup(drm_dev);
242 drm_kms_helper_poll_fini(drm_dev);
243 component_unbind_all(dev, drm_dev);
244 arm_iommu_detach_device(dev);
245 arm_iommu_release_mapping(dev->archdata.mapping);
246 drm_mode_config_cleanup(drm_dev);
247 drm_dev->dev_private = NULL;
252 void rockchip_drm_lastclose(struct drm_device *dev)
254 struct rockchip_drm_private *priv = dev->dev_private;
256 drm_fb_helper_restore_fbdev_mode_unlocked(&priv->fbdev_helper);
259 static const struct file_operations rockchip_drm_driver_fops = {
260 .owner = THIS_MODULE,
262 .mmap = rockchip_gem_mmap,
265 .unlocked_ioctl = drm_ioctl,
267 .compat_ioctl = drm_compat_ioctl,
269 .release = drm_release,
272 const struct vm_operations_struct rockchip_drm_vm_ops = {
273 .open = drm_gem_vm_open,
274 .close = drm_gem_vm_close,
277 static struct drm_driver rockchip_drm_driver = {
278 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
279 .load = rockchip_drm_load,
280 .unload = rockchip_drm_unload,
281 .lastclose = rockchip_drm_lastclose,
282 .get_vblank_counter = drm_vblank_no_hw_counter,
283 .enable_vblank = rockchip_drm_crtc_enable_vblank,
284 .disable_vblank = rockchip_drm_crtc_disable_vblank,
285 .gem_vm_ops = &rockchip_drm_vm_ops,
286 .gem_free_object = rockchip_gem_free_object,
287 .dumb_create = rockchip_gem_dumb_create,
288 .dumb_map_offset = rockchip_gem_dumb_map_offset,
289 .dumb_destroy = drm_gem_dumb_destroy,
290 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
291 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
292 .gem_prime_import = drm_gem_prime_import,
293 .gem_prime_export = drm_gem_prime_export,
294 .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
295 .gem_prime_vmap = rockchip_gem_prime_vmap,
296 .gem_prime_vunmap = rockchip_gem_prime_vunmap,
297 .gem_prime_mmap = rockchip_gem_mmap_buf,
298 .fops = &rockchip_drm_driver_fops,
302 .major = DRIVER_MAJOR,
303 .minor = DRIVER_MINOR,
306 #ifdef CONFIG_PM_SLEEP
307 static int rockchip_drm_sys_suspend(struct device *dev)
309 struct drm_device *drm = dev_get_drvdata(dev);
310 struct drm_connector *connector;
315 drm_modeset_lock_all(drm);
316 list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
317 int old_dpms = connector->dpms;
319 if (connector->funcs->dpms)
320 connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
322 /* Set the old mode back to the connector for resume */
323 connector->dpms = old_dpms;
325 drm_modeset_unlock_all(drm);
330 static int rockchip_drm_sys_resume(struct device *dev)
332 struct drm_device *drm = dev_get_drvdata(dev);
333 struct drm_connector *connector;
334 enum drm_connector_status status;
335 bool changed = false;
340 drm_modeset_lock_all(drm);
341 list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
342 int desired_mode = connector->dpms;
345 * at suspend time, we save dpms to connector->dpms,
346 * restore the old_dpms, and at current time, the connector
347 * dpms status must be DRM_MODE_DPMS_OFF.
349 connector->dpms = DRM_MODE_DPMS_OFF;
352 * If the connector has been disconnected during suspend,
353 * disconnect it from the encoder and leave it off. We'll notify
354 * userspace at the end.
356 if (desired_mode == DRM_MODE_DPMS_ON) {
357 status = connector->funcs->detect(connector, true);
358 if (status == connector_status_disconnected) {
359 connector->encoder = NULL;
360 connector->status = status;
365 if (connector->funcs->dpms)
366 connector->funcs->dpms(connector, desired_mode);
368 drm_modeset_unlock_all(drm);
370 drm_helper_resume_force_mode(drm);
373 drm_kms_helper_hotplug_event(drm);
379 static const struct dev_pm_ops rockchip_drm_pm_ops = {
380 SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
381 rockchip_drm_sys_resume)
385 * @node: device tree node containing encoder input ports
386 * @encoder: drm_encoder
388 int rockchip_drm_encoder_get_mux_id(struct device_node *node,
389 struct drm_encoder *encoder)
391 struct device_node *ep;
392 struct drm_crtc *crtc = encoder->crtc;
393 struct of_endpoint endpoint;
394 struct device_node *port;
400 for_each_endpoint_of_node(node, ep) {
401 port = of_graph_get_remote_port(ep);
403 if (port == crtc->port) {
404 ret = of_graph_parse_endpoint(ep, &endpoint);
406 return ret ?: endpoint.id;
412 EXPORT_SYMBOL_GPL(rockchip_drm_encoder_get_mux_id);
414 static int compare_of(struct device *dev, void *data)
416 struct device_node *np = data;
418 return dev->of_node == np;
421 static void rockchip_add_endpoints(struct device *dev,
422 struct component_match **match,
423 struct device_node *port)
425 struct device_node *ep, *remote;
427 for_each_child_of_node(port, ep) {
428 remote = of_graph_get_remote_port_parent(ep);
429 if (!remote || !of_device_is_available(remote)) {
432 } else if (!of_device_is_available(remote->parent)) {
433 dev_warn(dev, "parent device of %s is not available\n",
439 component_match_add(dev, match, compare_of, remote);
444 static int rockchip_drm_bind(struct device *dev)
446 struct drm_device *drm;
449 drm = drm_dev_alloc(&rockchip_drm_driver, dev);
453 ret = drm_dev_set_unique(drm, "%s", dev_name(dev));
457 ret = drm_dev_register(drm, 0);
461 dev_set_drvdata(dev, drm);
470 static void rockchip_drm_unbind(struct device *dev)
472 struct drm_device *drm = dev_get_drvdata(dev);
474 drm_dev_unregister(drm);
476 dev_set_drvdata(dev, NULL);
479 static const struct component_master_ops rockchip_drm_ops = {
480 .bind = rockchip_drm_bind,
481 .unbind = rockchip_drm_unbind,
484 static int rockchip_drm_platform_probe(struct platform_device *pdev)
486 struct device *dev = &pdev->dev;
487 struct component_match *match = NULL;
488 struct device_node *np = dev->of_node;
489 struct device_node *port;
495 * Bind the crtc ports first, so that
496 * drm_of_find_possible_crtcs called from encoder .bind callbacks
500 port = of_parse_phandle(np, "ports", i);
504 if (!of_device_is_available(port->parent)) {
509 component_match_add(dev, &match, compare_of, port->parent);
514 dev_err(dev, "missing 'ports' property\n");
519 dev_err(dev, "No available vop found for display-subsystem.\n");
523 * For each bound crtc, bind the encoders attached to its
527 port = of_parse_phandle(np, "ports", i);
531 if (!of_device_is_available(port->parent)) {
536 rockchip_add_endpoints(dev, &match, port);
540 return component_master_add_with_match(dev, &rockchip_drm_ops, match);
543 static int rockchip_drm_platform_remove(struct platform_device *pdev)
545 component_master_del(&pdev->dev, &rockchip_drm_ops);
550 static const struct of_device_id rockchip_drm_dt_ids[] = {
551 { .compatible = "rockchip,display-subsystem", },
554 MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
556 static struct platform_driver rockchip_drm_platform_driver = {
557 .probe = rockchip_drm_platform_probe,
558 .remove = rockchip_drm_platform_remove,
560 .name = "rockchip-drm",
561 .of_match_table = rockchip_drm_dt_ids,
562 .pm = &rockchip_drm_pm_ops,
566 module_platform_driver(rockchip_drm_platform_driver);
568 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
569 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
570 MODULE_LICENSE("GPL v2");