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/of_graph.h>
25 #include <linux/component.h>
27 #include "rockchip_drm_drv.h"
28 #include "rockchip_drm_fb.h"
29 #include "rockchip_drm_fbdev.h"
30 #include "rockchip_drm_gem.h"
32 #define DRIVER_NAME "rockchip"
33 #define DRIVER_DESC "RockChip Soc DRM"
34 #define DRIVER_DATE "20140818"
35 #define DRIVER_MAJOR 1
36 #define DRIVER_MINOR 0
39 * Attach a (component) device to the shared drm dma mapping from master drm
40 * device. This is used by the VOPs to map GEM buffers to a common DMA
43 int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
46 struct dma_iommu_mapping *mapping = drm_dev->dev->archdata.mapping;
49 ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
53 dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
55 return arm_iommu_attach_device(dev, mapping);
57 EXPORT_SYMBOL_GPL(rockchip_drm_dma_attach_device);
59 void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
62 arm_iommu_detach_device(dev);
64 EXPORT_SYMBOL_GPL(rockchip_drm_dma_detach_device);
66 int rockchip_register_crtc_funcs(struct drm_device *dev,
67 const struct rockchip_crtc_funcs *crtc_funcs,
70 struct rockchip_drm_private *priv = dev->dev_private;
72 if (pipe > ROCKCHIP_MAX_CRTC)
75 priv->crtc_funcs[pipe] = crtc_funcs;
79 EXPORT_SYMBOL_GPL(rockchip_register_crtc_funcs);
81 void rockchip_unregister_crtc_funcs(struct drm_device *dev, int pipe)
83 struct rockchip_drm_private *priv = dev->dev_private;
85 if (pipe > ROCKCHIP_MAX_CRTC)
88 priv->crtc_funcs[pipe] = NULL;
90 EXPORT_SYMBOL_GPL(rockchip_unregister_crtc_funcs);
92 static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm,
95 struct drm_crtc *crtc;
98 list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
105 static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev, int pipe)
107 struct rockchip_drm_private *priv = dev->dev_private;
108 struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
110 if (crtc && priv->crtc_funcs[pipe] &&
111 priv->crtc_funcs[pipe]->enable_vblank)
112 return priv->crtc_funcs[pipe]->enable_vblank(crtc);
117 static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev, int pipe)
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;
134 private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
138 drm_dev->dev_private = private;
140 drm_mode_config_init(drm_dev);
142 rockchip_drm_mode_config_init(drm_dev);
144 dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
146 if (!dev->dma_parms) {
148 goto err_config_cleanup;
151 /* TODO(djkurtz): fetch the mapping start/size from somewhere */
152 mapping = arm_iommu_create_mapping(&platform_bus_type, 0x00000000,
154 if (IS_ERR(mapping)) {
155 ret = PTR_ERR(mapping);
156 goto err_config_cleanup;
159 ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
161 goto err_release_mapping;
163 dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
165 ret = arm_iommu_attach_device(dev, mapping);
167 goto err_release_mapping;
169 /* Try to bind all sub drivers. */
170 ret = component_bind_all(dev, drm_dev);
172 goto err_detach_device;
174 /* init kms poll for handling hpd */
175 drm_kms_helper_poll_init(drm_dev);
178 * enable drm irq mode.
179 * - with irq_enabled = true, we can use the vblank feature.
181 drm_dev->irq_enabled = true;
183 ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC);
185 goto err_kms_helper_poll_fini;
188 * with vblank_disable_allowed = true, vblank interrupt will be disabled
189 * by drm timer once a current process gives up ownership of
190 * vblank event.(after drm_vblank_put function is called)
192 drm_dev->vblank_disable_allowed = true;
194 ret = rockchip_drm_fbdev_init(drm_dev);
196 goto err_vblank_cleanup;
200 drm_vblank_cleanup(drm_dev);
201 err_kms_helper_poll_fini:
202 drm_kms_helper_poll_fini(drm_dev);
203 component_unbind_all(dev, drm_dev);
205 arm_iommu_detach_device(dev);
207 arm_iommu_release_mapping(dev->archdata.mapping);
209 drm_mode_config_cleanup(drm_dev);
210 drm_dev->dev_private = NULL;
214 static int rockchip_drm_unload(struct drm_device *drm_dev)
216 struct device *dev = drm_dev->dev;
218 rockchip_drm_fbdev_fini(drm_dev);
219 drm_vblank_cleanup(drm_dev);
220 drm_kms_helper_poll_fini(drm_dev);
221 component_unbind_all(dev, drm_dev);
222 arm_iommu_detach_device(dev);
223 arm_iommu_release_mapping(dev->archdata.mapping);
224 drm_mode_config_cleanup(drm_dev);
225 drm_dev->dev_private = NULL;
230 void rockchip_drm_lastclose(struct drm_device *dev)
232 struct rockchip_drm_private *priv = dev->dev_private;
234 drm_fb_helper_restore_fbdev_mode_unlocked(&priv->fbdev_helper);
237 static const struct file_operations rockchip_drm_driver_fops = {
238 .owner = THIS_MODULE,
240 .mmap = rockchip_gem_mmap,
243 .unlocked_ioctl = drm_ioctl,
245 .compat_ioctl = drm_compat_ioctl,
247 .release = drm_release,
250 const struct vm_operations_struct rockchip_drm_vm_ops = {
251 .open = drm_gem_vm_open,
252 .close = drm_gem_vm_close,
255 static struct drm_driver rockchip_drm_driver = {
256 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
257 .load = rockchip_drm_load,
258 .unload = rockchip_drm_unload,
259 .lastclose = rockchip_drm_lastclose,
260 .get_vblank_counter = drm_vblank_count,
261 .enable_vblank = rockchip_drm_crtc_enable_vblank,
262 .disable_vblank = rockchip_drm_crtc_disable_vblank,
263 .gem_vm_ops = &rockchip_drm_vm_ops,
264 .gem_free_object = rockchip_gem_free_object,
265 .dumb_create = rockchip_gem_dumb_create,
266 .dumb_map_offset = rockchip_gem_dumb_map_offset,
267 .dumb_destroy = drm_gem_dumb_destroy,
268 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
269 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
270 .gem_prime_import = drm_gem_prime_import,
271 .gem_prime_export = drm_gem_prime_export,
272 .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
273 .gem_prime_vmap = rockchip_gem_prime_vmap,
274 .gem_prime_vunmap = rockchip_gem_prime_vunmap,
275 .gem_prime_mmap = rockchip_gem_mmap_buf,
276 .fops = &rockchip_drm_driver_fops,
280 .major = DRIVER_MAJOR,
281 .minor = DRIVER_MINOR,
284 #ifdef CONFIG_PM_SLEEP
285 static int rockchip_drm_sys_suspend(struct device *dev)
287 struct drm_device *drm = dev_get_drvdata(dev);
288 struct drm_connector *connector;
293 drm_modeset_lock_all(drm);
294 list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
295 int old_dpms = connector->dpms;
297 if (connector->funcs->dpms)
298 connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
300 /* Set the old mode back to the connector for resume */
301 connector->dpms = old_dpms;
303 drm_modeset_unlock_all(drm);
308 static int rockchip_drm_sys_resume(struct device *dev)
310 struct drm_device *drm = dev_get_drvdata(dev);
311 struct drm_connector *connector;
312 enum drm_connector_status status;
313 bool changed = false;
318 drm_modeset_lock_all(drm);
319 list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
320 int desired_mode = connector->dpms;
323 * at suspend time, we save dpms to connector->dpms,
324 * restore the old_dpms, and at current time, the connector
325 * dpms status must be DRM_MODE_DPMS_OFF.
327 connector->dpms = DRM_MODE_DPMS_OFF;
330 * If the connector has been disconnected during suspend,
331 * disconnect it from the encoder and leave it off. We'll notify
332 * userspace at the end.
334 if (desired_mode == DRM_MODE_DPMS_ON) {
335 status = connector->funcs->detect(connector, true);
336 if (status == connector_status_disconnected) {
337 connector->encoder = NULL;
338 connector->status = status;
343 if (connector->funcs->dpms)
344 connector->funcs->dpms(connector, desired_mode);
346 drm_modeset_unlock_all(drm);
348 drm_helper_resume_force_mode(drm);
351 drm_kms_helper_hotplug_event(drm);
357 static const struct dev_pm_ops rockchip_drm_pm_ops = {
358 SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
359 rockchip_drm_sys_resume)
363 * @node: device tree node containing encoder input ports
364 * @encoder: drm_encoder
366 int rockchip_drm_encoder_get_mux_id(struct device_node *node,
367 struct drm_encoder *encoder)
369 struct device_node *ep = NULL;
370 struct drm_crtc *crtc = encoder->crtc;
371 struct of_endpoint endpoint;
372 struct device_node *port;
379 ep = of_graph_get_next_endpoint(node, ep);
383 port = of_graph_get_remote_port(ep);
385 if (port == crtc->port) {
386 ret = of_graph_parse_endpoint(ep, &endpoint);
387 return ret ?: endpoint.id;
394 static int compare_of(struct device *dev, void *data)
396 struct device_node *np = data;
398 return dev->of_node == np;
401 static void rockchip_add_endpoints(struct device *dev,
402 struct component_match **match,
403 struct device_node *port)
405 struct device_node *ep, *remote;
407 for_each_child_of_node(port, ep) {
408 remote = of_graph_get_remote_port_parent(ep);
409 if (!remote || !of_device_is_available(remote)) {
412 } else if (!of_device_is_available(remote->parent)) {
413 dev_warn(dev, "parent device of %s is not available\n",
419 component_match_add(dev, match, compare_of, remote);
424 static int rockchip_drm_bind(struct device *dev)
426 struct drm_device *drm;
429 drm = drm_dev_alloc(&rockchip_drm_driver, dev);
433 ret = drm_dev_set_unique(drm, "%s", dev_name(dev));
437 ret = drm_dev_register(drm, 0);
441 dev_set_drvdata(dev, drm);
450 static void rockchip_drm_unbind(struct device *dev)
452 struct drm_device *drm = dev_get_drvdata(dev);
454 drm_dev_unregister(drm);
456 dev_set_drvdata(dev, NULL);
459 static const struct component_master_ops rockchip_drm_ops = {
460 .bind = rockchip_drm_bind,
461 .unbind = rockchip_drm_unbind,
464 static int rockchip_drm_platform_probe(struct platform_device *pdev)
466 struct device *dev = &pdev->dev;
467 struct component_match *match = NULL;
468 struct device_node *np = dev->of_node;
469 struct device_node *port;
475 * Bind the crtc ports first, so that
476 * drm_of_find_possible_crtcs called from encoder .bind callbacks
480 port = of_parse_phandle(np, "ports", i);
484 if (!of_device_is_available(port->parent)) {
489 component_match_add(dev, &match, compare_of, port->parent);
494 dev_err(dev, "missing 'ports' property\n");
499 dev_err(dev, "No available vop found for display-subsystem.\n");
503 * For each bound crtc, bind the encoders attached to its
507 port = of_parse_phandle(np, "ports", i);
511 if (!of_device_is_available(port->parent)) {
516 rockchip_add_endpoints(dev, &match, port);
520 return component_master_add_with_match(dev, &rockchip_drm_ops, match);
523 static int rockchip_drm_platform_remove(struct platform_device *pdev)
525 component_master_del(&pdev->dev, &rockchip_drm_ops);
530 static const struct of_device_id rockchip_drm_dt_ids[] = {
531 { .compatible = "rockchip,display-subsystem", },
534 MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
536 static struct platform_driver rockchip_drm_platform_driver = {
537 .probe = rockchip_drm_platform_probe,
538 .remove = rockchip_drm_platform_remove,
540 .owner = THIS_MODULE,
541 .name = "rockchip-drm",
542 .of_match_table = rockchip_drm_dt_ids,
543 .pm = &rockchip_drm_pm_ops,
547 module_platform_driver(rockchip_drm_platform_driver);
549 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
550 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
551 MODULE_LICENSE("GPL v2");