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/module.h>
11 #include <drm/drm_crtc_helper.h>
12 #include "armada_crtc.h"
13 #include "armada_drm.h"
14 #include "armada_gem.h"
15 #include "armada_hw.h"
16 #include <drm/armada_drm.h>
17 #include "armada_ioctlP.h"
19 #ifdef CONFIG_DRM_ARMADA_TDA1998X
20 #include <drm/i2c/tda998x.h>
21 #include "armada_slave.h"
23 static struct tda998x_encoder_params params = {
24 /* With 0x24, there is no translation between vp_out and int_vp
25 FB LCD out Pins VIP Int Vp
26 R:23:16 R:7:0 VPC7:0 7:0 7:0[R]
27 G:15:8 G:15:8 VPB7:0 23:16 23:16[G]
28 B:7:0 B:23:16 VPA7:0 15:8 15:8[B]
38 .audio_format = AFMT_SPDIF,
39 .audio_sample_rate = 44100,
42 static const struct armada_drm_slave_config tda19988_config = {
44 .crtcs = 1 << 0, /* Only LCD0 at the moment */
45 .polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT,
46 .interlace_allowed = true,
50 .platform_data = ¶ms,
55 static void armada_drm_unref_work(struct work_struct *work)
57 struct armada_private *priv =
58 container_of(work, struct armada_private, fb_unref_work);
59 struct drm_framebuffer *fb;
61 while (kfifo_get(&priv->fb_unref, &fb))
62 drm_framebuffer_unreference(fb);
65 /* Must be called with dev->event_lock held */
66 void __armada_drm_queue_unref_work(struct drm_device *dev,
67 struct drm_framebuffer *fb)
69 struct armada_private *priv = dev->dev_private;
72 * Yes, we really must jump through these hoops just to store a
73 * _pointer_ to something into the kfifo. This is utterly insane
74 * and idiotic, because it kfifo requires the _data_ pointed to by
75 * the pointer const, not the pointer itself. Not only that, but
76 * you have to pass a pointer _to_ the pointer you want stored.
78 const struct drm_framebuffer *silly_api_alert = fb;
79 WARN_ON(!kfifo_put(&priv->fb_unref, &silly_api_alert));
80 schedule_work(&priv->fb_unref_work);
83 void armada_drm_queue_unref_work(struct drm_device *dev,
84 struct drm_framebuffer *fb)
88 spin_lock_irqsave(&dev->event_lock, flags);
89 __armada_drm_queue_unref_work(dev, fb);
90 spin_unlock_irqrestore(&dev->event_lock, flags);
93 static int armada_drm_load(struct drm_device *dev, unsigned long flags)
95 const struct platform_device_id *id;
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 dev->dev_private = priv;
133 /* Get the implementation specific driver data. */
134 id = platform_get_device_id(dev->platformdev);
138 priv->variant = (struct armada_variant *)id->driver_data;
140 ret = priv->variant->init(priv, dev->dev);
144 INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
145 INIT_KFIFO(priv->fb_unref);
147 /* Mode setting support */
148 drm_mode_config_init(dev);
149 dev->mode_config.min_width = 320;
150 dev->mode_config.min_height = 200;
153 * With vscale enabled, the maximum width is 1920 due to the
154 * 1920 by 3 lines RAM
156 dev->mode_config.max_width = 1920;
157 dev->mode_config.max_height = 2048;
159 dev->mode_config.preferred_depth = 24;
160 dev->mode_config.funcs = &armada_drm_mode_config_funcs;
161 drm_mm_init(&priv->linear, mem->start, resource_size(mem));
163 /* Create all LCD controllers */
164 for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) {
168 ret = armada_drm_crtc_create(dev, n, res[n]);
173 #ifdef CONFIG_DRM_ARMADA_TDA1998X
174 ret = armada_drm_connector_slave_create(dev, &tda19988_config);
179 ret = drm_vblank_init(dev, n);
183 ret = drm_irq_install(dev);
187 dev->vblank_disable_allowed = 1;
189 ret = armada_fbdev_init(dev);
193 drm_kms_helper_poll_init(dev);
198 drm_irq_uninstall(dev);
200 drm_mode_config_cleanup(dev);
201 drm_mm_takedown(&priv->linear);
202 flush_work(&priv->fb_unref_work);
207 static int armada_drm_unload(struct drm_device *dev)
209 struct armada_private *priv = dev->dev_private;
211 drm_kms_helper_poll_fini(dev);
212 armada_fbdev_fini(dev);
213 drm_irq_uninstall(dev);
214 drm_mode_config_cleanup(dev);
215 drm_mm_takedown(&priv->linear);
216 flush_work(&priv->fb_unref_work);
217 dev->dev_private = NULL;
222 void armada_drm_vbl_event_add(struct armada_crtc *dcrtc,
223 struct armada_vbl_event *evt)
227 spin_lock_irqsave(&dcrtc->irq_lock, flags);
228 if (list_empty(&evt->node)) {
229 list_add_tail(&evt->node, &dcrtc->vbl_list);
231 drm_vblank_get(dcrtc->crtc.dev, dcrtc->num);
233 spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
236 void armada_drm_vbl_event_remove(struct armada_crtc *dcrtc,
237 struct armada_vbl_event *evt)
239 if (!list_empty(&evt->node)) {
240 list_del_init(&evt->node);
241 drm_vblank_put(dcrtc->crtc.dev, dcrtc->num);
245 void armada_drm_vbl_event_remove_unlocked(struct armada_crtc *dcrtc,
246 struct armada_vbl_event *evt)
250 spin_lock_irqsave(&dcrtc->irq_lock, flags);
251 armada_drm_vbl_event_remove(dcrtc, evt);
252 spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
255 /* These are called under the vbl_lock. */
256 static int armada_drm_enable_vblank(struct drm_device *dev, int crtc)
258 struct armada_private *priv = dev->dev_private;
259 armada_drm_crtc_enable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
263 static void armada_drm_disable_vblank(struct drm_device *dev, int crtc)
265 struct armada_private *priv = dev->dev_private;
266 armada_drm_crtc_disable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
269 static irqreturn_t armada_drm_irq_handler(int irq, void *arg)
271 struct drm_device *dev = arg;
272 struct armada_private *priv = dev->dev_private;
273 struct armada_crtc *dcrtc = priv->dcrtc[0];
274 uint32_t v, stat = readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR);
275 irqreturn_t handled = IRQ_NONE;
278 * This is rediculous - rather than writing bits to clear, we
279 * have to set the actual status register value. This is racy.
281 writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR);
283 /* Mask out those interrupts we haven't enabled */
284 v = stat & dcrtc->irq_ena;
286 if (v & (VSYNC_IRQ|GRA_FRAME_IRQ|DUMB_FRAMEDONE)) {
287 armada_drm_crtc_irq(dcrtc, stat);
288 handled = IRQ_HANDLED;
294 static int armada_drm_irq_postinstall(struct drm_device *dev)
296 struct armada_private *priv = dev->dev_private;
297 struct armada_crtc *dcrtc = priv->dcrtc[0];
299 spin_lock_irq(&dev->vbl_lock);
300 writel_relaxed(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
301 writel(0, dcrtc->base + LCD_SPU_IRQ_ISR);
302 spin_unlock_irq(&dev->vbl_lock);
307 static void armada_drm_irq_uninstall(struct drm_device *dev)
309 struct armada_private *priv = dev->dev_private;
310 struct armada_crtc *dcrtc = priv->dcrtc[0];
312 writel(0, dcrtc->base + LCD_SPU_IRQ_ENA);
315 static struct drm_ioctl_desc armada_ioctls[] = {
316 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,
318 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl,
320 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl,
324 static const struct file_operations armada_drm_fops = {
325 .owner = THIS_MODULE,
329 .unlocked_ioctl = drm_ioctl,
330 .mmap = drm_gem_mmap,
332 .release = drm_release,
335 static struct drm_driver armada_drm_driver = {
336 .load = armada_drm_load,
341 .unload = armada_drm_unload,
342 .get_vblank_counter = drm_vblank_count,
343 .enable_vblank = armada_drm_enable_vblank,
344 .disable_vblank = armada_drm_disable_vblank,
345 .irq_handler = armada_drm_irq_handler,
346 .irq_postinstall = armada_drm_irq_postinstall,
347 .irq_uninstall = armada_drm_irq_uninstall,
348 #ifdef CONFIG_DEBUG_FS
349 .debugfs_init = armada_drm_debugfs_init,
350 .debugfs_cleanup = armada_drm_debugfs_cleanup,
352 .gem_free_object = armada_gem_free_object,
353 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
354 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
355 .gem_prime_export = armada_gem_prime_export,
356 .gem_prime_import = armada_gem_prime_import,
357 .dumb_create = armada_gem_dumb_create,
358 .dumb_map_offset = armada_gem_dumb_map_offset,
359 .dumb_destroy = armada_gem_dumb_destroy,
360 .gem_vm_ops = &armada_gem_vm_ops,
363 .name = "armada-drm",
364 .desc = "Armada SoC DRM",
366 .driver_features = DRIVER_GEM | DRIVER_MODESET |
367 DRIVER_HAVE_IRQ | DRIVER_PRIME,
368 .ioctls = armada_ioctls,
369 .fops = &armada_drm_fops,
372 static int armada_drm_probe(struct platform_device *pdev)
374 return drm_platform_init(&armada_drm_driver, pdev);
377 static int armada_drm_remove(struct platform_device *pdev)
379 drm_platform_exit(&armada_drm_driver, pdev);
383 static const struct platform_device_id armada_drm_platform_ids[] = {
385 .name = "armada-drm",
386 .driver_data = (unsigned long)&armada510_ops,
388 .name = "armada-510-drm",
389 .driver_data = (unsigned long)&armada510_ops,
393 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
395 static struct platform_driver armada_drm_platform_driver = {
396 .probe = armada_drm_probe,
397 .remove = armada_drm_remove,
399 .name = "armada-drm",
400 .owner = THIS_MODULE,
402 .id_table = armada_drm_platform_ids,
405 static int __init armada_drm_init(void)
407 armada_drm_driver.num_ioctls = DRM_ARRAY_SIZE(armada_ioctls);
408 return platform_driver_register(&armada_drm_platform_driver);
410 module_init(armada_drm_init);
412 static void __exit armada_drm_exit(void)
414 platform_driver_unregister(&armada_drm_platform_driver);
416 module_exit(armada_drm_exit);
418 MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
419 MODULE_DESCRIPTION("Armada DRM Driver");
420 MODULE_LICENSE("GPL");
421 MODULE_ALIAS("platform:armada-drm");