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 <drm/drm_of.h>
23 #include <linux/dma-mapping.h>
24 #include <linux/pm_runtime.h>
25 #include <linux/module.h>
26 #include <linux/of_graph.h>
27 #include <linux/component.h>
29 #include "rockchip_drm_drv.h"
30 #include "rockchip_drm_fb.h"
31 #include "rockchip_drm_fbdev.h"
32 #include "rockchip_drm_gem.h"
34 #define DRIVER_NAME "rockchip"
35 #define DRIVER_DESC "RockChip Soc DRM"
36 #define DRIVER_DATE "20140818"
37 #define DRIVER_MAJOR 1
38 #define DRIVER_MINOR 0
41 * Attach a (component) device to the shared drm dma mapping from master drm
42 * device. This is used by the VOPs to map GEM buffers to a common DMA
45 int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
48 struct dma_iommu_mapping *mapping = drm_dev->dev->archdata.mapping;
51 ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
55 dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
57 return arm_iommu_attach_device(dev, mapping);
59 EXPORT_SYMBOL_GPL(rockchip_drm_dma_attach_device);
61 void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
64 arm_iommu_detach_device(dev);
66 EXPORT_SYMBOL_GPL(rockchip_drm_dma_detach_device);
68 int rockchip_register_crtc_funcs(struct drm_device *dev,
69 const struct rockchip_crtc_funcs *crtc_funcs,
72 struct rockchip_drm_private *priv = dev->dev_private;
74 if (pipe > ROCKCHIP_MAX_CRTC)
77 priv->crtc_funcs[pipe] = crtc_funcs;
81 EXPORT_SYMBOL_GPL(rockchip_register_crtc_funcs);
83 void rockchip_unregister_crtc_funcs(struct drm_device *dev, int pipe)
85 struct rockchip_drm_private *priv = 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 drm_dev->dev_private = private;
145 drm_mode_config_init(drm_dev);
147 rockchip_drm_mode_config_init(drm_dev);
149 dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
151 if (!dev->dma_parms) {
153 goto err_config_cleanup;
156 /* TODO(djkurtz): fetch the mapping start/size from somewhere */
157 mapping = arm_iommu_create_mapping(&platform_bus_type, 0x00000000,
159 if (IS_ERR(mapping)) {
160 ret = PTR_ERR(mapping);
161 goto err_config_cleanup;
164 ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
166 goto err_release_mapping;
168 dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
170 ret = arm_iommu_attach_device(dev, mapping);
172 goto err_release_mapping;
174 /* Try to bind all sub drivers. */
175 ret = component_bind_all(dev, drm_dev);
177 goto err_detach_device;
180 * All components are now added, we can publish the connector sysfs
181 * entries to userspace. This will generate hotplug events and so
182 * userspace will expect to be able to access DRM at this point.
184 list_for_each_entry(connector, &drm_dev->mode_config.connector_list,
186 ret = drm_connector_register(connector);
188 dev_err(drm_dev->dev,
189 "[CONNECTOR:%d:%s] drm_connector_register failed: %d\n",
191 connector->name, ret);
196 /* init kms poll for handling hpd */
197 drm_kms_helper_poll_init(drm_dev);
200 * enable drm irq mode.
201 * - with irq_enabled = true, we can use the vblank feature.
203 drm_dev->irq_enabled = true;
205 ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC);
207 goto err_kms_helper_poll_fini;
210 * with vblank_disable_allowed = true, vblank interrupt will be disabled
211 * by drm timer once a current process gives up ownership of
212 * vblank event.(after drm_vblank_put function is called)
214 drm_dev->vblank_disable_allowed = true;
216 ret = rockchip_drm_fbdev_init(drm_dev);
218 goto err_vblank_cleanup;
222 drm_vblank_cleanup(drm_dev);
223 err_kms_helper_poll_fini:
224 drm_kms_helper_poll_fini(drm_dev);
226 component_unbind_all(dev, drm_dev);
228 arm_iommu_detach_device(dev);
230 arm_iommu_release_mapping(dev->archdata.mapping);
232 drm_mode_config_cleanup(drm_dev);
233 drm_dev->dev_private = NULL;
237 static int rockchip_drm_unload(struct drm_device *drm_dev)
239 struct device *dev = drm_dev->dev;
241 rockchip_drm_fbdev_fini(drm_dev);
242 drm_vblank_cleanup(drm_dev);
243 drm_kms_helper_poll_fini(drm_dev);
244 component_unbind_all(dev, drm_dev);
245 arm_iommu_detach_device(dev);
246 arm_iommu_release_mapping(dev->archdata.mapping);
247 drm_mode_config_cleanup(drm_dev);
248 drm_dev->dev_private = NULL;
253 void rockchip_drm_lastclose(struct drm_device *dev)
255 struct rockchip_drm_private *priv = dev->dev_private;
257 drm_fb_helper_restore_fbdev_mode_unlocked(&priv->fbdev_helper);
260 static const struct file_operations rockchip_drm_driver_fops = {
261 .owner = THIS_MODULE,
263 .mmap = rockchip_gem_mmap,
266 .unlocked_ioctl = drm_ioctl,
268 .compat_ioctl = drm_compat_ioctl,
270 .release = drm_release,
273 const struct vm_operations_struct rockchip_drm_vm_ops = {
274 .open = drm_gem_vm_open,
275 .close = drm_gem_vm_close,
278 static struct drm_driver rockchip_drm_driver = {
279 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
280 .load = rockchip_drm_load,
281 .unload = rockchip_drm_unload,
282 .lastclose = rockchip_drm_lastclose,
283 .get_vblank_counter = drm_vblank_no_hw_counter,
284 .enable_vblank = rockchip_drm_crtc_enable_vblank,
285 .disable_vblank = rockchip_drm_crtc_disable_vblank,
286 .gem_vm_ops = &rockchip_drm_vm_ops,
287 .gem_free_object = rockchip_gem_free_object,
288 .dumb_create = rockchip_gem_dumb_create,
289 .dumb_map_offset = rockchip_gem_dumb_map_offset,
290 .dumb_destroy = drm_gem_dumb_destroy,
291 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
292 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
293 .gem_prime_import = drm_gem_prime_import,
294 .gem_prime_export = drm_gem_prime_export,
295 .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
296 .gem_prime_vmap = rockchip_gem_prime_vmap,
297 .gem_prime_vunmap = rockchip_gem_prime_vunmap,
298 .gem_prime_mmap = rockchip_gem_mmap_buf,
299 .fops = &rockchip_drm_driver_fops,
303 .major = DRIVER_MAJOR,
304 .minor = DRIVER_MINOR,
307 #ifdef CONFIG_PM_SLEEP
308 static int rockchip_drm_sys_suspend(struct device *dev)
310 struct drm_device *drm = dev_get_drvdata(dev);
311 struct drm_connector *connector;
316 drm_modeset_lock_all(drm);
317 list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
318 int old_dpms = connector->dpms;
320 if (connector->funcs->dpms)
321 connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
323 /* Set the old mode back to the connector for resume */
324 connector->dpms = old_dpms;
326 drm_modeset_unlock_all(drm);
331 static int rockchip_drm_sys_resume(struct device *dev)
333 struct drm_device *drm = dev_get_drvdata(dev);
334 struct drm_connector *connector;
335 enum drm_connector_status status;
336 bool changed = false;
341 drm_modeset_lock_all(drm);
342 list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
343 int desired_mode = connector->dpms;
346 * at suspend time, we save dpms to connector->dpms,
347 * restore the old_dpms, and at current time, the connector
348 * dpms status must be DRM_MODE_DPMS_OFF.
350 connector->dpms = DRM_MODE_DPMS_OFF;
353 * If the connector has been disconnected during suspend,
354 * disconnect it from the encoder and leave it off. We'll notify
355 * userspace at the end.
357 if (desired_mode == DRM_MODE_DPMS_ON) {
358 status = connector->funcs->detect(connector, true);
359 if (status == connector_status_disconnected) {
360 connector->encoder = NULL;
361 connector->status = status;
366 if (connector->funcs->dpms)
367 connector->funcs->dpms(connector, desired_mode);
369 drm_modeset_unlock_all(drm);
371 drm_helper_resume_force_mode(drm);
374 drm_kms_helper_hotplug_event(drm);
380 static const struct dev_pm_ops rockchip_drm_pm_ops = {
381 SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
382 rockchip_drm_sys_resume)
386 * @node: device tree node containing encoder input ports
387 * @encoder: drm_encoder
389 int rockchip_drm_encoder_get_mux_id(struct device_node *node,
390 struct drm_encoder *encoder)
392 struct device_node *ep;
393 struct drm_crtc *crtc = encoder->crtc;
394 struct of_endpoint endpoint;
395 struct device_node *port;
401 for_each_endpoint_of_node(node, ep) {
402 port = of_graph_get_remote_port(ep);
404 if (port == crtc->port) {
405 ret = of_graph_parse_endpoint(ep, &endpoint);
407 return ret ?: endpoint.id;
413 EXPORT_SYMBOL_GPL(rockchip_drm_encoder_get_mux_id);
415 static int compare_of(struct device *dev, void *data)
417 struct device_node *np = data;
419 return dev->of_node == np;
422 static int rockchip_drm_bind(struct device *dev)
424 struct drm_device *drm;
427 drm = drm_dev_alloc(&rockchip_drm_driver, dev);
431 ret = drm_dev_set_unique(drm, "%s", dev_name(dev));
435 ret = drm_dev_register(drm, 0);
439 dev_set_drvdata(dev, drm);
448 static void rockchip_drm_unbind(struct device *dev)
450 struct drm_device *drm = dev_get_drvdata(dev);
452 drm_dev_unregister(drm);
454 dev_set_drvdata(dev, NULL);
457 static const struct component_master_ops rockchip_drm_ops = {
458 .bind = rockchip_drm_bind,
459 .unbind = rockchip_drm_unbind,
462 static int rockchip_drm_platform_probe(struct platform_device *pdev)
464 int ret = drm_of_component_probe(&pdev->dev, compare_of,
467 /* keep compatibility with old code that was returning -ENODEV */
474 static int rockchip_drm_platform_remove(struct platform_device *pdev)
476 component_master_del(&pdev->dev, &rockchip_drm_ops);
481 static const struct of_device_id rockchip_drm_dt_ids[] = {
482 { .compatible = "rockchip,display-subsystem", },
485 MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
487 static struct platform_driver rockchip_drm_platform_driver = {
488 .probe = rockchip_drm_platform_probe,
489 .remove = rockchip_drm_platform_remove,
491 .name = "rockchip-drm",
492 .of_match_table = rockchip_drm_dt_ids,
493 .pm = &rockchip_drm_pm_ops,
497 module_platform_driver(rockchip_drm_platform_driver);
499 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
500 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
501 MODULE_LICENSE("GPL v2");