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_gem_cma_helper.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>
28 #include <linux/console.h>
30 #include "rockchip_drm_drv.h"
31 #include "rockchip_drm_fb.h"
32 #include "rockchip_drm_fbdev.h"
33 #include "rockchip_drm_gem.h"
35 #define DRIVER_NAME "rockchip"
36 #define DRIVER_DESC "RockChip Soc DRM"
37 #define DRIVER_DATE "20140818"
38 #define DRIVER_MAJOR 1
39 #define DRIVER_MINOR 0
41 static bool is_support_iommu = true;
42 static struct drm_driver rockchip_drm_driver;
45 * Attach a (component) device to the shared drm dma mapping from master drm
46 * device. This is used by the VOPs to map GEM buffers to a common DMA
49 int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
52 struct dma_iommu_mapping *mapping = drm_dev->dev->archdata.mapping;
55 if (!is_support_iommu)
58 ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
62 dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
64 return arm_iommu_attach_device(dev, mapping);
67 void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
70 if (!is_support_iommu)
73 arm_iommu_detach_device(dev);
76 int rockchip_register_crtc_funcs(struct drm_crtc *crtc,
77 const struct rockchip_crtc_funcs *crtc_funcs)
79 int pipe = drm_crtc_index(crtc);
80 struct rockchip_drm_private *priv = crtc->dev->dev_private;
82 if (pipe >= ROCKCHIP_MAX_CRTC)
85 priv->crtc_funcs[pipe] = crtc_funcs;
90 void rockchip_unregister_crtc_funcs(struct drm_crtc *crtc)
92 int pipe = drm_crtc_index(crtc);
93 struct rockchip_drm_private *priv = crtc->dev->dev_private;
95 if (pipe >= ROCKCHIP_MAX_CRTC)
98 priv->crtc_funcs[pipe] = NULL;
101 static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm,
104 struct drm_crtc *crtc;
107 list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
114 static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev,
117 struct rockchip_drm_private *priv = dev->dev_private;
118 struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
120 if (crtc && priv->crtc_funcs[pipe] &&
121 priv->crtc_funcs[pipe]->enable_vblank)
122 return priv->crtc_funcs[pipe]->enable_vblank(crtc);
127 static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev,
130 struct rockchip_drm_private *priv = dev->dev_private;
131 struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
133 if (crtc && priv->crtc_funcs[pipe] &&
134 priv->crtc_funcs[pipe]->enable_vblank)
135 priv->crtc_funcs[pipe]->disable_vblank(crtc);
138 static int rockchip_drm_bind(struct device *dev)
140 struct drm_device *drm_dev;
141 struct rockchip_drm_private *private;
142 struct dma_iommu_mapping *mapping = NULL;
145 drm_dev = drm_dev_alloc(&rockchip_drm_driver, dev);
149 dev_set_drvdata(dev, drm_dev);
151 private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
157 drm_dev->dev_private = private;
159 drm_mode_config_init(drm_dev);
161 rockchip_drm_mode_config_init(drm_dev);
163 dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
165 if (!dev->dma_parms) {
167 goto err_config_cleanup;
170 if (is_support_iommu) {
171 /* TODO(djkurtz): fetch the mapping start/size from somewhere */
172 mapping = arm_iommu_create_mapping(&platform_bus_type,
175 if (IS_ERR(mapping)) {
176 ret = PTR_ERR(mapping);
177 goto err_config_cleanup;
180 ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
182 goto err_release_mapping;
184 dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
186 ret = arm_iommu_attach_device(dev, mapping);
188 goto err_release_mapping;
191 /* Try to bind all sub drivers. */
192 ret = component_bind_all(dev, drm_dev);
194 goto err_detach_device;
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;
209 drm_mode_config_reset(drm_dev);
211 ret = rockchip_drm_fbdev_init(drm_dev);
213 goto err_vblank_cleanup;
215 ret = drm_dev_register(drm_dev, 0);
219 if (is_support_iommu)
220 arm_iommu_release_mapping(mapping);
223 rockchip_drm_fbdev_fini(drm_dev);
225 drm_vblank_cleanup(drm_dev);
226 err_kms_helper_poll_fini:
227 drm_kms_helper_poll_fini(drm_dev);
228 component_unbind_all(dev, drm_dev);
230 if (is_support_iommu)
231 arm_iommu_detach_device(dev);
233 if (is_support_iommu)
234 arm_iommu_release_mapping(mapping);
236 drm_mode_config_cleanup(drm_dev);
237 drm_dev->dev_private = NULL;
239 drm_dev_unref(drm_dev);
243 static void rockchip_drm_unbind(struct device *dev)
245 struct drm_device *drm_dev = dev_get_drvdata(dev);
247 rockchip_drm_fbdev_fini(drm_dev);
248 drm_vblank_cleanup(drm_dev);
249 drm_kms_helper_poll_fini(drm_dev);
250 component_unbind_all(dev, drm_dev);
251 if (is_support_iommu)
252 arm_iommu_detach_device(dev);
253 drm_mode_config_cleanup(drm_dev);
254 drm_dev->dev_private = NULL;
255 drm_dev_unregister(drm_dev);
256 drm_dev_unref(drm_dev);
257 dev_set_drvdata(dev, NULL);
260 static void rockchip_drm_lastclose(struct drm_device *dev)
262 struct rockchip_drm_private *priv = dev->dev_private;
264 drm_fb_helper_restore_fbdev_mode_unlocked(&priv->fbdev_helper);
267 static const struct file_operations rockchip_drm_driver_fops = {
268 .owner = THIS_MODULE,
270 .mmap = rockchip_gem_mmap,
273 .unlocked_ioctl = drm_ioctl,
275 .compat_ioctl = drm_compat_ioctl,
277 .release = drm_release,
280 static struct drm_driver rockchip_drm_driver = {
281 .driver_features = DRIVER_MODESET | DRIVER_GEM |
282 DRIVER_PRIME | DRIVER_ATOMIC,
283 .lastclose = rockchip_drm_lastclose,
284 .get_vblank_counter = drm_vblank_no_hw_counter,
285 .enable_vblank = rockchip_drm_crtc_enable_vblank,
286 .disable_vblank = rockchip_drm_crtc_disable_vblank,
287 .gem_vm_ops = &drm_gem_cma_vm_ops,
288 .gem_free_object_unlocked = rockchip_gem_free_object,
289 .dumb_create = rockchip_gem_dumb_create,
290 .dumb_map_offset = rockchip_gem_dumb_map_offset,
291 .dumb_destroy = drm_gem_dumb_destroy,
292 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
293 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
294 .gem_prime_import = drm_gem_prime_import,
295 .gem_prime_export = drm_gem_prime_export,
296 .gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
297 .gem_prime_vmap = rockchip_gem_prime_vmap,
298 .gem_prime_vunmap = rockchip_gem_prime_vunmap,
299 .gem_prime_mmap = rockchip_gem_mmap_buf,
300 .fops = &rockchip_drm_driver_fops,
304 .major = DRIVER_MAJOR,
305 .minor = DRIVER_MINOR,
308 #ifdef CONFIG_PM_SLEEP
309 void rockchip_drm_fb_suspend(struct drm_device *drm)
311 struct rockchip_drm_private *priv = drm->dev_private;
314 drm_fb_helper_set_suspend(&priv->fbdev_helper, 1);
318 void rockchip_drm_fb_resume(struct drm_device *drm)
320 struct rockchip_drm_private *priv = drm->dev_private;
323 drm_fb_helper_set_suspend(&priv->fbdev_helper, 0);
327 static int rockchip_drm_sys_suspend(struct device *dev)
329 struct drm_device *drm = dev_get_drvdata(dev);
330 struct rockchip_drm_private *priv = drm->dev_private;
332 drm_kms_helper_poll_disable(drm);
333 rockchip_drm_fb_suspend(drm);
335 priv->state = drm_atomic_helper_suspend(drm);
336 if (IS_ERR(priv->state)) {
337 rockchip_drm_fb_resume(drm);
338 drm_kms_helper_poll_enable(drm);
339 return PTR_ERR(priv->state);
345 static int rockchip_drm_sys_resume(struct device *dev)
347 struct drm_device *drm = dev_get_drvdata(dev);
348 struct rockchip_drm_private *priv = drm->dev_private;
350 drm_atomic_helper_resume(drm, priv->state);
351 rockchip_drm_fb_resume(drm);
352 drm_kms_helper_poll_enable(drm);
358 static const struct dev_pm_ops rockchip_drm_pm_ops = {
359 SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
360 rockchip_drm_sys_resume)
363 static int compare_of(struct device *dev, void *data)
365 struct device_node *np = data;
367 return dev->of_node == np;
370 static void rockchip_add_endpoints(struct device *dev,
371 struct component_match **match,
372 struct device_node *port)
374 struct device_node *ep, *remote;
376 for_each_child_of_node(port, ep) {
377 remote = of_graph_get_remote_port_parent(ep);
378 if (!remote || !of_device_is_available(remote)) {
381 } else if (!of_device_is_available(remote->parent)) {
382 dev_warn(dev, "parent device of %s is not available\n",
388 component_match_add(dev, match, compare_of, remote);
393 static const struct component_master_ops rockchip_drm_ops = {
394 .bind = rockchip_drm_bind,
395 .unbind = rockchip_drm_unbind,
398 static int rockchip_drm_platform_probe(struct platform_device *pdev)
400 struct device *dev = &pdev->dev;
401 struct component_match *match = NULL;
402 struct device_node *np = dev->of_node;
403 struct device_node *port;
409 * Bind the crtc ports first, so that
410 * drm_of_find_possible_crtcs called from encoder .bind callbacks
414 struct device_node *iommu;
416 port = of_parse_phandle(np, "ports", i);
420 if (!of_device_is_available(port->parent)) {
425 iommu = of_parse_phandle(port->parent, "iommus", 0);
426 if (!iommu || !of_device_is_available(iommu->parent)) {
427 dev_dbg(dev, "no iommu attached for %s, using non-iommu buffers\n",
428 port->parent->full_name);
430 * if there is a crtc not support iommu, force set all
431 * crtc use non-iommu buffer.
433 is_support_iommu = false;
437 component_match_add(dev, &match, compare_of, port->parent);
442 dev_err(dev, "missing 'ports' property\n");
447 dev_err(dev, "No available vop found for display-subsystem.\n");
451 * For each bound crtc, bind the encoders attached to its
455 port = of_parse_phandle(np, "ports", i);
459 if (!of_device_is_available(port->parent)) {
464 rockchip_add_endpoints(dev, &match, port);
468 return component_master_add_with_match(dev, &rockchip_drm_ops, match);
471 static int rockchip_drm_platform_remove(struct platform_device *pdev)
473 component_master_del(&pdev->dev, &rockchip_drm_ops);
478 static const struct of_device_id rockchip_drm_dt_ids[] = {
479 { .compatible = "rockchip,display-subsystem", },
482 MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
484 static struct platform_driver rockchip_drm_platform_driver = {
485 .probe = rockchip_drm_platform_probe,
486 .remove = rockchip_drm_platform_remove,
488 .name = "rockchip-drm",
489 .of_match_table = rockchip_drm_dt_ids,
490 .pm = &rockchip_drm_pm_ops,
494 module_platform_driver(rockchip_drm_platform_driver);
496 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
497 MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
498 MODULE_LICENSE("GPL v2");