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
9 #include <linux/dma-mapping.h>
10 #include <linux/pm_runtime.h>
11 #include <linux/module.h>
12 #include <linux/of_graph.h>
13 #include <linux/of_platform.h>
14 #include <linux/component.h>
15 #include <linux/console.h>
16 #include <linux/iommu.h>
18 #include <drm/drm_aperture.h>
19 #include <drm/drm_drv.h>
20 #include <drm/drm_fb_helper.h>
21 #include <drm/drm_gem_cma_helper.h>
22 #include <drm/drm_of.h>
23 #include <drm/drm_probe_helper.h>
24 #include <drm/drm_vblank.h>
26 #if defined(CONFIG_ARM_DMA_USE_IOMMU)
27 #include <asm/dma-iommu.h>
29 #define arm_iommu_detach_device(...) ({ })
30 #define arm_iommu_release_mapping(...) ({ })
31 #define to_dma_iommu_mapping(dev) NULL
34 #include "rockchip_drm_drv.h"
35 #include "rockchip_drm_fb.h"
36 #include "rockchip_drm_gem.h"
38 #define DRIVER_NAME "rockchip"
39 #define DRIVER_DESC "RockChip Soc DRM"
40 #define DRIVER_DATE "20140818"
41 #define DRIVER_MAJOR 1
42 #define DRIVER_MINOR 0
44 static const struct drm_driver rockchip_drm_driver;
47 * Attach a (component) device to the shared drm dma mapping from master drm
48 * device. This is used by the VOPs to map GEM buffers to a common DMA
51 int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
54 struct rockchip_drm_private *private = drm_dev->dev_private;
60 if (IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)) {
61 struct dma_iommu_mapping *mapping = to_dma_iommu_mapping(dev);
64 arm_iommu_detach_device(dev);
65 arm_iommu_release_mapping(mapping);
69 ret = iommu_attach_device(private->domain, dev);
71 DRM_DEV_ERROR(dev, "Failed to attach iommu device\n");
78 void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
81 struct rockchip_drm_private *private = drm_dev->dev_private;
86 iommu_detach_device(private->domain, dev);
89 void rockchip_drm_dma_init_device(struct drm_device *drm_dev,
92 struct rockchip_drm_private *private = drm_dev->dev_private;
94 if (!device_iommu_mapped(dev))
95 private->iommu_dev = ERR_PTR(-ENODEV);
96 else if (!private->iommu_dev)
97 private->iommu_dev = dev;
100 static int rockchip_drm_init_iommu(struct drm_device *drm_dev)
102 struct rockchip_drm_private *private = drm_dev->dev_private;
103 struct iommu_domain_geometry *geometry;
106 if (IS_ERR_OR_NULL(private->iommu_dev))
109 private->domain = iommu_domain_alloc(private->iommu_dev->bus);
110 if (!private->domain)
113 geometry = &private->domain->geometry;
114 start = geometry->aperture_start;
115 end = geometry->aperture_end;
117 DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",
119 drm_mm_init(&private->mm, start, end - start + 1);
120 mutex_init(&private->mm_lock);
125 static void rockchip_iommu_cleanup(struct drm_device *drm_dev)
127 struct rockchip_drm_private *private = drm_dev->dev_private;
129 if (!private->domain)
132 drm_mm_takedown(&private->mm);
133 iommu_domain_free(private->domain);
136 static int rockchip_drm_bind(struct device *dev)
138 struct drm_device *drm_dev;
139 struct rockchip_drm_private *private;
142 /* Remove existing drivers that may own the framebuffer memory. */
143 ret = drm_aperture_remove_framebuffers(false, &rockchip_drm_driver);
146 "Failed to remove existing framebuffers - %d.\n",
151 drm_dev = drm_dev_alloc(&rockchip_drm_driver, dev);
153 return PTR_ERR(drm_dev);
155 dev_set_drvdata(dev, drm_dev);
157 private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
163 drm_dev->dev_private = private;
165 ret = drmm_mode_config_init(drm_dev);
169 rockchip_drm_mode_config_init(drm_dev);
171 /* Try to bind all sub drivers. */
172 ret = component_bind_all(dev, drm_dev);
176 ret = rockchip_drm_init_iommu(drm_dev);
180 ret = drm_vblank_init(drm_dev, drm_dev->mode_config.num_crtc);
182 goto err_iommu_cleanup;
184 drm_mode_config_reset(drm_dev);
186 /* init kms poll for handling hpd */
187 drm_kms_helper_poll_init(drm_dev);
189 ret = drm_dev_register(drm_dev, 0);
191 goto err_kms_helper_poll_fini;
193 drm_fbdev_generic_setup(drm_dev, 0);
196 err_kms_helper_poll_fini:
197 drm_kms_helper_poll_fini(drm_dev);
199 rockchip_iommu_cleanup(drm_dev);
201 component_unbind_all(dev, drm_dev);
203 drm_dev_put(drm_dev);
207 static void rockchip_drm_unbind(struct device *dev)
209 struct drm_device *drm_dev = dev_get_drvdata(dev);
211 drm_dev_unregister(drm_dev);
213 drm_kms_helper_poll_fini(drm_dev);
215 drm_atomic_helper_shutdown(drm_dev);
216 component_unbind_all(dev, drm_dev);
217 rockchip_iommu_cleanup(drm_dev);
219 drm_dev_put(drm_dev);
222 DEFINE_DRM_GEM_FOPS(rockchip_drm_driver_fops);
224 static const struct drm_driver rockchip_drm_driver = {
225 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
226 .dumb_create = rockchip_gem_dumb_create,
227 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
228 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
229 .gem_prime_import_sg_table = rockchip_gem_prime_import_sg_table,
230 .gem_prime_mmap = drm_gem_prime_mmap,
231 .fops = &rockchip_drm_driver_fops,
235 .major = DRIVER_MAJOR,
236 .minor = DRIVER_MINOR,
239 #ifdef CONFIG_PM_SLEEP
240 static int rockchip_drm_sys_suspend(struct device *dev)
242 struct drm_device *drm = dev_get_drvdata(dev);
244 return drm_mode_config_helper_suspend(drm);
247 static int rockchip_drm_sys_resume(struct device *dev)
249 struct drm_device *drm = dev_get_drvdata(dev);
251 return drm_mode_config_helper_resume(drm);
255 static const struct dev_pm_ops rockchip_drm_pm_ops = {
256 SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
257 rockchip_drm_sys_resume)
260 #define MAX_ROCKCHIP_SUB_DRIVERS 16
261 static struct platform_driver *rockchip_sub_drivers[MAX_ROCKCHIP_SUB_DRIVERS];
262 static int num_rockchip_sub_drivers;
265 * Get the endpoint id of the remote endpoint of the given encoder. This
266 * information is used by the VOP2 driver to identify the encoder.
268 * @rkencoder: The encoder to get the remote endpoint id from
269 * @np: The encoder device node
270 * @port: The number of the port leading to the VOP2
271 * @reg: The endpoint number leading to the VOP2
273 int rockchip_drm_encoder_set_crtc_endpoint_id(struct rockchip_encoder *rkencoder,
274 struct device_node *np, int port, int reg)
276 struct of_endpoint ep;
277 struct device_node *en, *ren;
280 en = of_graph_get_endpoint_by_regs(np, port, reg);
284 ren = of_graph_get_remote_endpoint(en);
288 ret = of_graph_parse_endpoint(ren, &ep);
292 rkencoder->crtc_endpoint_id = ep.id;
298 * Check if a vop endpoint is leading to a rockchip subdriver or bridge.
299 * Should be called from the component bind stage of the drivers
300 * to ensure that all subdrivers are probed.
302 * @ep: endpoint of a rockchip vop
304 * returns true if subdriver, false if external bridge and -ENODEV
305 * if remote port does not contain a device.
307 int rockchip_drm_endpoint_is_subdriver(struct device_node *ep)
309 struct device_node *node = of_graph_get_remote_port_parent(ep);
310 struct platform_device *pdev;
311 struct device_driver *drv;
317 /* status disabled will prevent creation of platform-devices */
318 if (!of_device_is_available(node)) {
323 pdev = of_find_device_by_node(node);
326 /* enabled non-platform-devices can immediately return here */
331 * All rockchip subdrivers have probed at this point, so
332 * any device not having a driver now is an external bridge.
334 drv = pdev->dev.driver;
336 platform_device_put(pdev);
340 for (i = 0; i < num_rockchip_sub_drivers; i++) {
341 if (rockchip_sub_drivers[i] == to_platform_driver(drv)) {
342 platform_device_put(pdev);
347 platform_device_put(pdev);
351 static void rockchip_drm_match_remove(struct device *dev)
353 struct device_link *link;
355 list_for_each_entry(link, &dev->links.consumers, s_node)
356 device_link_del(link);
359 static struct component_match *rockchip_drm_match_add(struct device *dev)
361 struct component_match *match = NULL;
364 for (i = 0; i < num_rockchip_sub_drivers; i++) {
365 struct platform_driver *drv = rockchip_sub_drivers[i];
366 struct device *p = NULL, *d;
369 d = platform_find_device_by_driver(p, &drv->driver);
376 device_link_add(dev, d, DL_FLAG_STATELESS);
377 component_match_add(dev, &match, component_compare_dev, d);
382 rockchip_drm_match_remove(dev);
384 return match ?: ERR_PTR(-ENODEV);
387 static const struct component_master_ops rockchip_drm_ops = {
388 .bind = rockchip_drm_bind,
389 .unbind = rockchip_drm_unbind,
392 static int rockchip_drm_platform_of_probe(struct device *dev)
394 struct device_node *np = dev->of_node;
395 struct device_node *port;
403 port = of_parse_phandle(np, "ports", i);
407 if (!of_device_is_available(port->parent)) {
417 DRM_DEV_ERROR(dev, "missing 'ports' property\n");
423 "No available vop found for display-subsystem.\n");
430 static int rockchip_drm_platform_probe(struct platform_device *pdev)
432 struct device *dev = &pdev->dev;
433 struct component_match *match = NULL;
436 ret = rockchip_drm_platform_of_probe(dev);
440 match = rockchip_drm_match_add(dev);
442 return PTR_ERR(match);
444 ret = component_master_add_with_match(dev, &rockchip_drm_ops, match);
446 rockchip_drm_match_remove(dev);
453 static int rockchip_drm_platform_remove(struct platform_device *pdev)
455 component_master_del(&pdev->dev, &rockchip_drm_ops);
457 rockchip_drm_match_remove(&pdev->dev);
462 static void rockchip_drm_platform_shutdown(struct platform_device *pdev)
464 struct drm_device *drm = platform_get_drvdata(pdev);
467 drm_atomic_helper_shutdown(drm);
470 static const struct of_device_id rockchip_drm_dt_ids[] = {
471 { .compatible = "rockchip,display-subsystem", },
474 MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
476 static struct platform_driver rockchip_drm_platform_driver = {
477 .probe = rockchip_drm_platform_probe,
478 .remove = rockchip_drm_platform_remove,
479 .shutdown = rockchip_drm_platform_shutdown,
481 .name = "rockchip-drm",
482 .of_match_table = rockchip_drm_dt_ids,
483 .pm = &rockchip_drm_pm_ops,
487 #define ADD_ROCKCHIP_SUB_DRIVER(drv, cond) { \
488 if (IS_ENABLED(cond) && \
489 !WARN_ON(num_rockchip_sub_drivers >= MAX_ROCKCHIP_SUB_DRIVERS)) \
490 rockchip_sub_drivers[num_rockchip_sub_drivers++] = &drv; \
493 static int __init rockchip_drm_init(void)
497 if (drm_firmware_drivers_only())
500 num_rockchip_sub_drivers = 0;
501 ADD_ROCKCHIP_SUB_DRIVER(vop_platform_driver, CONFIG_ROCKCHIP_VOP);
502 ADD_ROCKCHIP_SUB_DRIVER(vop2_platform_driver, CONFIG_ROCKCHIP_VOP2);
503 ADD_ROCKCHIP_SUB_DRIVER(rockchip_lvds_driver,
504 CONFIG_ROCKCHIP_LVDS);
505 ADD_ROCKCHIP_SUB_DRIVER(rockchip_dp_driver,
506 CONFIG_ROCKCHIP_ANALOGIX_DP);
507 ADD_ROCKCHIP_SUB_DRIVER(cdn_dp_driver, CONFIG_ROCKCHIP_CDN_DP);
508 ADD_ROCKCHIP_SUB_DRIVER(dw_hdmi_rockchip_pltfm_driver,
509 CONFIG_ROCKCHIP_DW_HDMI);
510 ADD_ROCKCHIP_SUB_DRIVER(dw_mipi_dsi_rockchip_driver,
511 CONFIG_ROCKCHIP_DW_MIPI_DSI);
512 ADD_ROCKCHIP_SUB_DRIVER(inno_hdmi_driver, CONFIG_ROCKCHIP_INNO_HDMI);
513 ADD_ROCKCHIP_SUB_DRIVER(rk3066_hdmi_driver,
514 CONFIG_ROCKCHIP_RK3066_HDMI);
516 ret = platform_register_drivers(rockchip_sub_drivers,
517 num_rockchip_sub_drivers);
521 ret = platform_driver_register(&rockchip_drm_platform_driver);
523 goto err_unreg_drivers;
528 platform_unregister_drivers(rockchip_sub_drivers,
529 num_rockchip_sub_drivers);
533 static void __exit rockchip_drm_fini(void)
535 platform_driver_unregister(&rockchip_drm_platform_driver);
537 platform_unregister_drivers(rockchip_sub_drivers,
538 num_rockchip_sub_drivers);
541 module_init(rockchip_drm_init);
542 module_exit(rockchip_drm_fini);
544 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
545 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
546 MODULE_LICENSE("GPL v2");