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->irq_enabled = true;
194 dev->vblank_disable_allowed = 1;
196 ret = armada_fbdev_init(dev);
200 drm_kms_helper_poll_init(dev);
205 if (is_componentized(dev->dev))
206 component_unbind_all(dev->dev, dev);
208 drm_mode_config_cleanup(dev);
209 drm_mm_takedown(&priv->linear);
210 flush_work(&priv->fb_unref_work);
215 static int armada_drm_unload(struct drm_device *dev)
217 struct armada_private *priv = dev->dev_private;
219 drm_kms_helper_poll_fini(dev);
220 armada_fbdev_fini(dev);
222 if (is_componentized(dev->dev))
223 component_unbind_all(dev->dev, dev);
225 drm_mode_config_cleanup(dev);
226 drm_mm_takedown(&priv->linear);
227 flush_work(&priv->fb_unref_work);
228 dev->dev_private = NULL;
233 void armada_drm_vbl_event_add(struct armada_crtc *dcrtc,
234 struct armada_vbl_event *evt)
238 spin_lock_irqsave(&dcrtc->irq_lock, flags);
239 if (list_empty(&evt->node)) {
240 list_add_tail(&evt->node, &dcrtc->vbl_list);
242 drm_vblank_get(dcrtc->crtc.dev, dcrtc->num);
244 spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
247 void armada_drm_vbl_event_remove(struct armada_crtc *dcrtc,
248 struct armada_vbl_event *evt)
250 if (!list_empty(&evt->node)) {
251 list_del_init(&evt->node);
252 drm_vblank_put(dcrtc->crtc.dev, dcrtc->num);
256 void armada_drm_vbl_event_remove_unlocked(struct armada_crtc *dcrtc,
257 struct armada_vbl_event *evt)
261 spin_lock_irqsave(&dcrtc->irq_lock, flags);
262 armada_drm_vbl_event_remove(dcrtc, evt);
263 spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
266 /* These are called under the vbl_lock. */
267 static int armada_drm_enable_vblank(struct drm_device *dev, int crtc)
269 struct armada_private *priv = dev->dev_private;
270 armada_drm_crtc_enable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
274 static void armada_drm_disable_vblank(struct drm_device *dev, int crtc)
276 struct armada_private *priv = dev->dev_private;
277 armada_drm_crtc_disable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
280 static struct drm_ioctl_desc armada_ioctls[] = {
281 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,
283 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl,
285 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl,
289 static void armada_drm_lastclose(struct drm_device *dev)
291 armada_fbdev_lastclose(dev);
294 static const struct file_operations armada_drm_fops = {
295 .owner = THIS_MODULE,
299 .unlocked_ioctl = drm_ioctl,
300 .mmap = drm_gem_mmap,
302 .release = drm_release,
305 static struct drm_driver armada_drm_driver = {
306 .load = armada_drm_load,
310 .lastclose = armada_drm_lastclose,
311 .unload = armada_drm_unload,
312 .set_busid = drm_platform_set_busid,
313 .get_vblank_counter = drm_vblank_count,
314 .enable_vblank = armada_drm_enable_vblank,
315 .disable_vblank = armada_drm_disable_vblank,
316 #ifdef CONFIG_DEBUG_FS
317 .debugfs_init = armada_drm_debugfs_init,
318 .debugfs_cleanup = armada_drm_debugfs_cleanup,
320 .gem_free_object = armada_gem_free_object,
321 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
322 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
323 .gem_prime_export = armada_gem_prime_export,
324 .gem_prime_import = armada_gem_prime_import,
325 .dumb_create = armada_gem_dumb_create,
326 .dumb_map_offset = armada_gem_dumb_map_offset,
327 .dumb_destroy = armada_gem_dumb_destroy,
328 .gem_vm_ops = &armada_gem_vm_ops,
331 .name = "armada-drm",
332 .desc = "Armada SoC DRM",
334 .driver_features = DRIVER_GEM | DRIVER_MODESET |
335 DRIVER_HAVE_IRQ | DRIVER_PRIME,
336 .ioctls = armada_ioctls,
337 .fops = &armada_drm_fops,
340 static int armada_drm_bind(struct device *dev)
342 return drm_platform_init(&armada_drm_driver, to_platform_device(dev));
345 static void armada_drm_unbind(struct device *dev)
347 drm_put_dev(dev_get_drvdata(dev));
350 static int compare_of(struct device *dev, void *data)
352 return dev->of_node == data;
355 static int compare_dev_name(struct device *dev, void *data)
357 const char *name = data;
358 return !strcmp(dev_name(dev), name);
361 static void armada_add_endpoints(struct device *dev,
362 struct component_match **match, struct device_node *port)
364 struct device_node *ep, *remote;
366 for_each_child_of_node(port, ep) {
367 remote = of_graph_get_remote_port_parent(ep);
368 if (!remote || !of_device_is_available(remote)) {
371 } else if (!of_device_is_available(remote->parent)) {
372 dev_warn(dev, "parent device of %s is not available\n",
378 component_match_add(dev, match, compare_of, remote);
383 static int armada_drm_find_components(struct device *dev,
384 struct component_match **match)
386 struct device_node *port;
390 struct device_node *np = dev->of_node;
393 port = of_parse_phandle(np, "ports", i);
397 component_match_add(dev, match, compare_of, port);
402 dev_err(dev, "missing 'ports' property\n");
407 port = of_parse_phandle(np, "ports", i);
411 armada_add_endpoints(dev, match, port);
414 } else if (dev->platform_data) {
415 char **devices = dev->platform_data;
418 for (i = 0; devices[i]; i++)
419 component_match_add(dev, match, compare_dev_name,
423 dev_err(dev, "missing 'ports' property\n");
427 for (i = 0; devices[i]; i++) {
428 d = bus_find_device_by_name(&platform_bus_type, NULL,
430 if (d && d->of_node) {
431 for_each_child_of_node(d->of_node, port)
432 armada_add_endpoints(dev, match, port);
441 static const struct component_master_ops armada_master_ops = {
442 .bind = armada_drm_bind,
443 .unbind = armada_drm_unbind,
446 static int armada_drm_probe(struct platform_device *pdev)
448 if (is_componentized(&pdev->dev)) {
449 struct component_match *match = NULL;
452 ret = armada_drm_find_components(&pdev->dev, &match);
456 return component_master_add_with_match(&pdev->dev,
457 &armada_master_ops, match);
459 return drm_platform_init(&armada_drm_driver, pdev);
463 static int armada_drm_remove(struct platform_device *pdev)
465 if (is_componentized(&pdev->dev))
466 component_master_del(&pdev->dev, &armada_master_ops);
468 drm_put_dev(platform_get_drvdata(pdev));
472 static const struct platform_device_id armada_drm_platform_ids[] = {
474 .name = "armada-drm",
475 .driver_data = (unsigned long)&armada510_ops,
477 .name = "armada-510-drm",
478 .driver_data = (unsigned long)&armada510_ops,
482 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
484 static struct platform_driver armada_drm_platform_driver = {
485 .probe = armada_drm_probe,
486 .remove = armada_drm_remove,
488 .name = "armada-drm",
489 .owner = THIS_MODULE,
491 .id_table = armada_drm_platform_ids,
494 static int __init armada_drm_init(void)
498 armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
500 ret = platform_driver_register(&armada_lcd_platform_driver);
503 ret = platform_driver_register(&armada_drm_platform_driver);
505 platform_driver_unregister(&armada_lcd_platform_driver);
508 module_init(armada_drm_init);
510 static void __exit armada_drm_exit(void)
512 platform_driver_unregister(&armada_drm_platform_driver);
513 platform_driver_unregister(&armada_lcd_platform_driver);
515 module_exit(armada_drm_exit);
517 MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
518 MODULE_DESCRIPTION("Armada DRM Driver");
519 MODULE_LICENSE("GPL");
520 MODULE_ALIAS("platform:armada-drm");