1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
4 * Author:Mark Yao <mark.yao@rock-chips.com>
6 * based on exynos_drm_drv.c
10 #include <drm/drm_fb_helper.h>
11 #include <drm/drm_gem_cma_helper.h>
12 #include <drm/drm_of.h>
13 #include <drm/drm_probe_helper.h>
14 #include <linux/dma-mapping.h>
15 #include <linux/dma-iommu.h>
16 #include <linux/pm_runtime.h>
17 #include <linux/module.h>
18 #include <linux/of_graph.h>
19 #include <linux/of_platform.h>
20 #include <linux/component.h>
21 #include <linux/console.h>
22 #include <linux/iommu.h>
24 #include "rockchip_drm_drv.h"
25 #include "rockchip_drm_fb.h"
26 #include "rockchip_drm_fbdev.h"
27 #include "rockchip_drm_gem.h"
29 #define DRIVER_NAME "rockchip"
30 #define DRIVER_DESC "RockChip Soc DRM"
31 #define DRIVER_DATE "20140818"
32 #define DRIVER_MAJOR 1
33 #define DRIVER_MINOR 0
35 static bool is_support_iommu = true;
36 static struct drm_driver rockchip_drm_driver;
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 rockchip_drm_private *private = drm_dev->dev_private;
49 if (!is_support_iommu)
52 ret = iommu_attach_device(private->domain, dev);
54 DRM_DEV_ERROR(dev, "Failed to attach iommu device\n");
61 void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
64 struct rockchip_drm_private *private = drm_dev->dev_private;
65 struct iommu_domain *domain = private->domain;
67 if (!is_support_iommu)
70 iommu_detach_device(domain, dev);
73 static int rockchip_drm_init_iommu(struct drm_device *drm_dev)
75 struct rockchip_drm_private *private = drm_dev->dev_private;
76 struct iommu_domain_geometry *geometry;
79 if (!is_support_iommu)
82 private->domain = iommu_domain_alloc(&platform_bus_type);
86 geometry = &private->domain->geometry;
87 start = geometry->aperture_start;
88 end = geometry->aperture_end;
90 DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",
92 drm_mm_init(&private->mm, start, end - start + 1);
93 mutex_init(&private->mm_lock);
98 static void rockchip_iommu_cleanup(struct drm_device *drm_dev)
100 struct rockchip_drm_private *private = drm_dev->dev_private;
102 if (!is_support_iommu)
105 drm_mm_takedown(&private->mm);
106 iommu_domain_free(private->domain);
109 static int rockchip_drm_bind(struct device *dev)
111 struct drm_device *drm_dev;
112 struct rockchip_drm_private *private;
115 drm_dev = drm_dev_alloc(&rockchip_drm_driver, dev);
117 return PTR_ERR(drm_dev);
119 dev_set_drvdata(dev, drm_dev);
121 private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
127 drm_dev->dev_private = private;
129 INIT_LIST_HEAD(&private->psr_list);
130 mutex_init(&private->psr_list_lock);
132 ret = rockchip_drm_init_iommu(drm_dev);
136 drm_mode_config_init(drm_dev);
138 rockchip_drm_mode_config_init(drm_dev);
140 /* Try to bind all sub drivers. */
141 ret = component_bind_all(dev, drm_dev);
143 goto err_mode_config_cleanup;
145 ret = drm_vblank_init(drm_dev, drm_dev->mode_config.num_crtc);
149 drm_mode_config_reset(drm_dev);
152 * enable drm irq mode.
153 * - with irq_enabled = true, we can use the vblank feature.
155 drm_dev->irq_enabled = true;
157 ret = rockchip_drm_fbdev_init(drm_dev);
161 /* init kms poll for handling hpd */
162 drm_kms_helper_poll_init(drm_dev);
164 ret = drm_dev_register(drm_dev, 0);
166 goto err_kms_helper_poll_fini;
169 err_kms_helper_poll_fini:
170 drm_kms_helper_poll_fini(drm_dev);
171 rockchip_drm_fbdev_fini(drm_dev);
173 component_unbind_all(dev, drm_dev);
174 err_mode_config_cleanup:
175 drm_mode_config_cleanup(drm_dev);
176 rockchip_iommu_cleanup(drm_dev);
178 drm_dev->dev_private = NULL;
179 dev_set_drvdata(dev, NULL);
180 drm_dev_put(drm_dev);
184 static void rockchip_drm_unbind(struct device *dev)
186 struct drm_device *drm_dev = dev_get_drvdata(dev);
188 drm_dev_unregister(drm_dev);
190 rockchip_drm_fbdev_fini(drm_dev);
191 drm_kms_helper_poll_fini(drm_dev);
193 drm_atomic_helper_shutdown(drm_dev);
194 component_unbind_all(dev, drm_dev);
195 drm_mode_config_cleanup(drm_dev);
196 rockchip_iommu_cleanup(drm_dev);
198 drm_dev->dev_private = NULL;
199 dev_set_drvdata(dev, NULL);
200 drm_dev_put(drm_dev);
203 static const struct file_operations rockchip_drm_driver_fops = {
204 .owner = THIS_MODULE,
206 .mmap = rockchip_gem_mmap,
209 .unlocked_ioctl = drm_ioctl,
210 .compat_ioctl = drm_compat_ioctl,
211 .release = drm_release,
214 static struct drm_driver rockchip_drm_driver = {
215 .driver_features = DRIVER_MODESET | DRIVER_GEM |
216 DRIVER_PRIME | DRIVER_ATOMIC,
217 .lastclose = drm_fb_helper_lastclose,
218 .gem_vm_ops = &drm_gem_cma_vm_ops,
219 .gem_free_object_unlocked = rockchip_gem_free_object,
220 .dumb_create = rockchip_gem_dumb_create,
221 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
222 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
223 .gem_prime_import = drm_gem_prime_import,
224 .gem_prime_export = drm_gem_prime_export,
225 .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
226 .gem_prime_import_sg_table = rockchip_gem_prime_import_sg_table,
227 .gem_prime_vmap = rockchip_gem_prime_vmap,
228 .gem_prime_vunmap = rockchip_gem_prime_vunmap,
229 .gem_prime_mmap = rockchip_gem_mmap_buf,
230 .fops = &rockchip_drm_driver_fops,
234 .major = DRIVER_MAJOR,
235 .minor = DRIVER_MINOR,
238 #ifdef CONFIG_PM_SLEEP
239 static int rockchip_drm_sys_suspend(struct device *dev)
241 struct drm_device *drm = dev_get_drvdata(dev);
243 return drm_mode_config_helper_suspend(drm);
246 static int rockchip_drm_sys_resume(struct device *dev)
248 struct drm_device *drm = dev_get_drvdata(dev);
250 return drm_mode_config_helper_resume(drm);
254 static const struct dev_pm_ops rockchip_drm_pm_ops = {
255 SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
256 rockchip_drm_sys_resume)
259 #define MAX_ROCKCHIP_SUB_DRIVERS 16
260 static struct platform_driver *rockchip_sub_drivers[MAX_ROCKCHIP_SUB_DRIVERS];
261 static int num_rockchip_sub_drivers;
264 * Check if a vop endpoint is leading to a rockchip subdriver or bridge.
265 * Should be called from the component bind stage of the drivers
266 * to ensure that all subdrivers are probed.
268 * @ep: endpoint of a rockchip vop
270 * returns true if subdriver, false if external bridge and -ENODEV
271 * if remote port does not contain a device.
273 int rockchip_drm_endpoint_is_subdriver(struct device_node *ep)
275 struct device_node *node = of_graph_get_remote_port_parent(ep);
276 struct platform_device *pdev;
277 struct device_driver *drv;
283 /* status disabled will prevent creation of platform-devices */
284 pdev = of_find_device_by_node(node);
290 * All rockchip subdrivers have probed at this point, so
291 * any device not having a driver now is an external bridge.
293 drv = pdev->dev.driver;
295 platform_device_put(pdev);
299 for (i = 0; i < num_rockchip_sub_drivers; i++) {
300 if (rockchip_sub_drivers[i] == to_platform_driver(drv)) {
301 platform_device_put(pdev);
306 platform_device_put(pdev);
310 static int compare_dev(struct device *dev, void *data)
312 return dev == (struct device *)data;
315 static void rockchip_drm_match_remove(struct device *dev)
317 struct device_link *link;
319 list_for_each_entry(link, &dev->links.consumers, s_node)
320 device_link_del(link);
323 static struct component_match *rockchip_drm_match_add(struct device *dev)
325 struct component_match *match = NULL;
328 for (i = 0; i < num_rockchip_sub_drivers; i++) {
329 struct platform_driver *drv = rockchip_sub_drivers[i];
330 struct device *p = NULL, *d;
333 d = bus_find_device(&platform_bus_type, p, &drv->driver,
334 (void *)platform_bus_type.match);
341 device_link_add(dev, d, DL_FLAG_STATELESS);
342 component_match_add(dev, &match, compare_dev, d);
347 rockchip_drm_match_remove(dev);
349 return match ?: ERR_PTR(-ENODEV);
352 static const struct component_master_ops rockchip_drm_ops = {
353 .bind = rockchip_drm_bind,
354 .unbind = rockchip_drm_unbind,
357 static int rockchip_drm_platform_of_probe(struct device *dev)
359 struct device_node *np = dev->of_node;
360 struct device_node *port;
368 struct device_node *iommu;
370 port = of_parse_phandle(np, "ports", i);
374 if (!of_device_is_available(port->parent)) {
379 iommu = of_parse_phandle(port->parent, "iommus", 0);
380 if (!iommu || !of_device_is_available(iommu->parent)) {
382 "no iommu attached for %pOF, using non-iommu buffers\n",
385 * if there is a crtc not support iommu, force set all
386 * crtc use non-iommu buffer.
388 is_support_iommu = false;
398 DRM_DEV_ERROR(dev, "missing 'ports' property\n");
404 "No available vop found for display-subsystem.\n");
411 static int rockchip_drm_platform_probe(struct platform_device *pdev)
413 struct device *dev = &pdev->dev;
414 struct component_match *match = NULL;
417 ret = rockchip_drm_platform_of_probe(dev);
421 match = rockchip_drm_match_add(dev);
423 return PTR_ERR(match);
425 ret = component_master_add_with_match(dev, &rockchip_drm_ops, match);
427 rockchip_drm_match_remove(dev);
434 static int rockchip_drm_platform_remove(struct platform_device *pdev)
436 component_master_del(&pdev->dev, &rockchip_drm_ops);
438 rockchip_drm_match_remove(&pdev->dev);
443 static void rockchip_drm_platform_shutdown(struct platform_device *pdev)
445 struct drm_device *drm = platform_get_drvdata(pdev);
448 drm_atomic_helper_shutdown(drm);
451 static const struct of_device_id rockchip_drm_dt_ids[] = {
452 { .compatible = "rockchip,display-subsystem", },
455 MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
457 static struct platform_driver rockchip_drm_platform_driver = {
458 .probe = rockchip_drm_platform_probe,
459 .remove = rockchip_drm_platform_remove,
460 .shutdown = rockchip_drm_platform_shutdown,
462 .name = "rockchip-drm",
463 .of_match_table = rockchip_drm_dt_ids,
464 .pm = &rockchip_drm_pm_ops,
468 #define ADD_ROCKCHIP_SUB_DRIVER(drv, cond) { \
469 if (IS_ENABLED(cond) && \
470 !WARN_ON(num_rockchip_sub_drivers >= MAX_ROCKCHIP_SUB_DRIVERS)) \
471 rockchip_sub_drivers[num_rockchip_sub_drivers++] = &drv; \
474 static int __init rockchip_drm_init(void)
478 num_rockchip_sub_drivers = 0;
479 ADD_ROCKCHIP_SUB_DRIVER(vop_platform_driver, CONFIG_DRM_ROCKCHIP);
480 ADD_ROCKCHIP_SUB_DRIVER(rockchip_lvds_driver,
481 CONFIG_ROCKCHIP_LVDS);
482 ADD_ROCKCHIP_SUB_DRIVER(rockchip_dp_driver,
483 CONFIG_ROCKCHIP_ANALOGIX_DP);
484 ADD_ROCKCHIP_SUB_DRIVER(cdn_dp_driver, CONFIG_ROCKCHIP_CDN_DP);
485 ADD_ROCKCHIP_SUB_DRIVER(dw_hdmi_rockchip_pltfm_driver,
486 CONFIG_ROCKCHIP_DW_HDMI);
487 ADD_ROCKCHIP_SUB_DRIVER(dw_mipi_dsi_rockchip_driver,
488 CONFIG_ROCKCHIP_DW_MIPI_DSI);
489 ADD_ROCKCHIP_SUB_DRIVER(inno_hdmi_driver, CONFIG_ROCKCHIP_INNO_HDMI);
490 ADD_ROCKCHIP_SUB_DRIVER(rk3066_hdmi_driver,
491 CONFIG_ROCKCHIP_RK3066_HDMI);
493 ret = platform_register_drivers(rockchip_sub_drivers,
494 num_rockchip_sub_drivers);
498 ret = platform_driver_register(&rockchip_drm_platform_driver);
500 goto err_unreg_drivers;
505 platform_unregister_drivers(rockchip_sub_drivers,
506 num_rockchip_sub_drivers);
510 static void __exit rockchip_drm_fini(void)
512 platform_driver_unregister(&rockchip_drm_platform_driver);
514 platform_unregister_drivers(rockchip_sub_drivers,
515 num_rockchip_sub_drivers);
518 module_init(rockchip_drm_init);
519 module_exit(rockchip_drm_fini);
521 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
522 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
523 MODULE_LICENSE("GPL v2");