2 * Copyright (C) 2012 Russell King
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
9 #include <linux/component.h>
10 #include <linux/module.h>
11 #include <linux/of_graph.h>
13 #include <drm/drm_crtc_helper.h>
14 #include "armada_crtc.h"
15 #include "armada_drm.h"
16 #include "armada_gem.h"
17 #include "armada_hw.h"
18 #include <drm/armada_drm.h>
19 #include "armada_ioctlP.h"
21 #ifdef CONFIG_DRM_ARMADA_TDA1998X
22 #include <drm/i2c/tda998x.h>
23 #include "armada_slave.h"
25 static struct tda998x_encoder_params params = {
26 /* With 0x24, there is no translation between vp_out and int_vp
27 FB LCD out Pins VIP Int Vp
28 R:23:16 R:7:0 VPC7:0 7:0 7:0[R]
29 G:15:8 G:15:8 VPB7:0 23:16 23:16[G]
30 B:7:0 B:23:16 VPA7:0 15:8 15:8[B]
40 .audio_format = AFMT_SPDIF,
41 .audio_sample_rate = 44100,
44 static const struct armada_drm_slave_config tda19988_config = {
46 .crtcs = 1 << 0, /* Only LCD0 at the moment */
47 .polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT,
48 .interlace_allowed = true,
52 .platform_data = ¶ms,
57 static bool is_componentized(struct device *dev)
59 return dev->of_node || dev->platform_data;
62 static void armada_drm_unref_work(struct work_struct *work)
64 struct armada_private *priv =
65 container_of(work, struct armada_private, fb_unref_work);
66 struct drm_framebuffer *fb;
68 while (kfifo_get(&priv->fb_unref, &fb))
69 drm_framebuffer_unreference(fb);
72 /* Must be called with dev->event_lock held */
73 void __armada_drm_queue_unref_work(struct drm_device *dev,
74 struct drm_framebuffer *fb)
76 struct armada_private *priv = dev->dev_private;
78 WARN_ON(!kfifo_put(&priv->fb_unref, fb));
79 schedule_work(&priv->fb_unref_work);
82 void armada_drm_queue_unref_work(struct drm_device *dev,
83 struct drm_framebuffer *fb)
87 spin_lock_irqsave(&dev->event_lock, flags);
88 __armada_drm_queue_unref_work(dev, fb);
89 spin_unlock_irqrestore(&dev->event_lock, flags);
92 static int armada_drm_load(struct drm_device *dev, unsigned long flags)
94 const struct platform_device_id *id;
95 const struct armada_variant *variant;
96 struct armada_private *priv;
97 struct resource *res[ARRAY_SIZE(priv->dcrtc)];
98 struct resource *mem = NULL;
101 memset(res, 0, sizeof(res));
103 for (n = i = 0; ; n++) {
104 struct resource *r = platform_get_resource(dev->platformdev,
109 /* Resources above 64K are graphics memory */
110 if (resource_size(r) > SZ_64K)
112 else if (i < ARRAY_SIZE(priv->dcrtc))
121 if (!devm_request_mem_region(dev->dev, mem->start,
122 resource_size(mem), "armada-drm"))
125 priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
127 DRM_ERROR("failed to allocate private\n");
131 platform_set_drvdata(dev->platformdev, dev);
132 dev->dev_private = priv;
134 /* Get the implementation specific driver data. */
135 id = platform_get_device_id(dev->platformdev);
139 variant = (const struct armada_variant *)id->driver_data;
141 INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
142 INIT_KFIFO(priv->fb_unref);
144 /* Mode setting support */
145 drm_mode_config_init(dev);
146 dev->mode_config.min_width = 320;
147 dev->mode_config.min_height = 200;
150 * With vscale enabled, the maximum width is 1920 due to the
151 * 1920 by 3 lines RAM
153 dev->mode_config.max_width = 1920;
154 dev->mode_config.max_height = 2048;
156 dev->mode_config.preferred_depth = 24;
157 dev->mode_config.funcs = &armada_drm_mode_config_funcs;
158 drm_mm_init(&priv->linear, mem->start, resource_size(mem));
160 /* Create all LCD controllers */
161 for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) {
167 irq = platform_get_irq(dev->platformdev, n);
171 ret = armada_drm_crtc_create(dev, dev->dev, res[n], irq,
177 if (is_componentized(dev->dev)) {
178 ret = component_bind_all(dev->dev, dev);
182 #ifdef CONFIG_DRM_ARMADA_TDA1998X
183 ret = armada_drm_connector_slave_create(dev, &tda19988_config);
189 ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
193 dev->vblank_disable_allowed = 1;
195 ret = armada_fbdev_init(dev);
199 drm_kms_helper_poll_init(dev);
204 if (is_componentized(dev->dev))
205 component_unbind_all(dev->dev, dev);
207 drm_mode_config_cleanup(dev);
208 drm_mm_takedown(&priv->linear);
209 flush_work(&priv->fb_unref_work);
214 static int armada_drm_unload(struct drm_device *dev)
216 struct armada_private *priv = dev->dev_private;
218 drm_kms_helper_poll_fini(dev);
219 armada_fbdev_fini(dev);
221 if (is_componentized(dev->dev))
222 component_unbind_all(dev->dev, dev);
224 drm_mode_config_cleanup(dev);
225 drm_mm_takedown(&priv->linear);
226 flush_work(&priv->fb_unref_work);
227 dev->dev_private = NULL;
232 void armada_drm_vbl_event_add(struct armada_crtc *dcrtc,
233 struct armada_vbl_event *evt)
237 spin_lock_irqsave(&dcrtc->irq_lock, flags);
238 if (list_empty(&evt->node)) {
239 list_add_tail(&evt->node, &dcrtc->vbl_list);
241 drm_vblank_get(dcrtc->crtc.dev, dcrtc->num);
243 spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
246 void armada_drm_vbl_event_remove(struct armada_crtc *dcrtc,
247 struct armada_vbl_event *evt)
249 if (!list_empty(&evt->node)) {
250 list_del_init(&evt->node);
251 drm_vblank_put(dcrtc->crtc.dev, dcrtc->num);
255 void armada_drm_vbl_event_remove_unlocked(struct armada_crtc *dcrtc,
256 struct armada_vbl_event *evt)
260 spin_lock_irqsave(&dcrtc->irq_lock, flags);
261 armada_drm_vbl_event_remove(dcrtc, evt);
262 spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
265 /* These are called under the vbl_lock. */
266 static int armada_drm_enable_vblank(struct drm_device *dev, int crtc)
268 struct armada_private *priv = dev->dev_private;
269 armada_drm_crtc_enable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
273 static void armada_drm_disable_vblank(struct drm_device *dev, int crtc)
275 struct armada_private *priv = dev->dev_private;
276 armada_drm_crtc_disable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
279 static struct drm_ioctl_desc armada_ioctls[] = {
280 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,
282 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl,
284 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl,
288 static void armada_drm_lastclose(struct drm_device *dev)
290 armada_fbdev_lastclose(dev);
293 static const struct file_operations armada_drm_fops = {
294 .owner = THIS_MODULE,
298 .unlocked_ioctl = drm_ioctl,
299 .mmap = drm_gem_mmap,
301 .release = drm_release,
304 static struct drm_driver armada_drm_driver = {
305 .load = armada_drm_load,
309 .lastclose = armada_drm_lastclose,
310 .unload = armada_drm_unload,
311 .get_vblank_counter = drm_vblank_count,
312 .enable_vblank = armada_drm_enable_vblank,
313 .disable_vblank = armada_drm_disable_vblank,
314 #ifdef CONFIG_DEBUG_FS
315 .debugfs_init = armada_drm_debugfs_init,
316 .debugfs_cleanup = armada_drm_debugfs_cleanup,
318 .gem_free_object = armada_gem_free_object,
319 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
320 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
321 .gem_prime_export = armada_gem_prime_export,
322 .gem_prime_import = armada_gem_prime_import,
323 .dumb_create = armada_gem_dumb_create,
324 .dumb_map_offset = armada_gem_dumb_map_offset,
325 .dumb_destroy = armada_gem_dumb_destroy,
326 .gem_vm_ops = &armada_gem_vm_ops,
329 .name = "armada-drm",
330 .desc = "Armada SoC DRM",
332 .driver_features = DRIVER_GEM | DRIVER_MODESET |
334 .ioctls = armada_ioctls,
335 .fops = &armada_drm_fops,
338 static int armada_drm_bind(struct device *dev)
340 return drm_platform_init(&armada_drm_driver, to_platform_device(dev));
343 static void armada_drm_unbind(struct device *dev)
345 drm_put_dev(dev_get_drvdata(dev));
348 static int compare_of(struct device *dev, void *data)
350 return dev->of_node == data;
353 static int compare_dev_name(struct device *dev, void *data)
355 const char *name = data;
356 return !strcmp(dev_name(dev), name);
359 static void armada_add_endpoints(struct device *dev,
360 struct component_match **match, struct device_node *port)
362 struct device_node *ep, *remote;
364 for_each_child_of_node(port, ep) {
365 remote = of_graph_get_remote_port_parent(ep);
366 if (!remote || !of_device_is_available(remote)) {
369 } else if (!of_device_is_available(remote->parent)) {
370 dev_warn(dev, "parent device of %s is not available\n",
376 component_match_add(dev, match, compare_of, remote);
381 static int armada_drm_find_components(struct device *dev,
382 struct component_match **match)
384 struct device_node *port;
388 struct device_node *np = dev->of_node;
391 port = of_parse_phandle(np, "ports", i);
395 component_match_add(dev, match, compare_of, port);
400 dev_err(dev, "missing 'ports' property\n");
405 port = of_parse_phandle(np, "ports", i);
409 armada_add_endpoints(dev, match, port);
412 } else if (dev->platform_data) {
413 char **devices = dev->platform_data;
416 for (i = 0; devices[i]; i++)
417 component_match_add(dev, match, compare_dev_name,
421 dev_err(dev, "missing 'ports' property\n");
425 for (i = 0; devices[i]; i++) {
426 d = bus_find_device_by_name(&platform_bus_type, NULL,
428 if (d && d->of_node) {
429 for_each_child_of_node(d->of_node, port)
430 armada_add_endpoints(dev, match, port);
439 static const struct component_master_ops armada_master_ops = {
440 .bind = armada_drm_bind,
441 .unbind = armada_drm_unbind,
444 static int armada_drm_probe(struct platform_device *pdev)
446 if (is_componentized(&pdev->dev)) {
447 struct component_match *match = NULL;
450 ret = armada_drm_find_components(&pdev->dev, &match);
454 return component_master_add_with_match(&pdev->dev,
455 &armada_master_ops, match);
457 return drm_platform_init(&armada_drm_driver, pdev);
461 static int armada_drm_remove(struct platform_device *pdev)
463 if (is_componentized(&pdev->dev))
464 component_master_del(&pdev->dev, &armada_master_ops);
466 drm_put_dev(platform_get_drvdata(pdev));
470 static const struct platform_device_id armada_drm_platform_ids[] = {
472 .name = "armada-drm",
473 .driver_data = (unsigned long)&armada510_ops,
475 .name = "armada-510-drm",
476 .driver_data = (unsigned long)&armada510_ops,
480 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
482 static struct platform_driver armada_drm_platform_driver = {
483 .probe = armada_drm_probe,
484 .remove = armada_drm_remove,
486 .name = "armada-drm",
487 .owner = THIS_MODULE,
489 .id_table = armada_drm_platform_ids,
492 static int __init armada_drm_init(void)
496 armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
498 ret = platform_driver_register(&armada_lcd_platform_driver);
501 ret = platform_driver_register(&armada_drm_platform_driver);
503 platform_driver_unregister(&armada_lcd_platform_driver);
506 module_init(armada_drm_init);
508 static void __exit armada_drm_exit(void)
510 platform_driver_unregister(&armada_drm_platform_driver);
511 platform_driver_unregister(&armada_lcd_platform_driver);
513 module_exit(armada_drm_exit);
515 MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
516 MODULE_DESCRIPTION("Armada DRM Driver");
517 MODULE_LICENSE("GPL");
518 MODULE_ALIAS("platform:armada-drm");