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;
71 WARN_ON(!kfifo_put(&priv->fb_unref, fb));
72 schedule_work(&priv->fb_unref_work);
75 void armada_drm_queue_unref_work(struct drm_device *dev,
76 struct drm_framebuffer *fb)
80 spin_lock_irqsave(&dev->event_lock, flags);
81 __armada_drm_queue_unref_work(dev, fb);
82 spin_unlock_irqrestore(&dev->event_lock, flags);
85 static int armada_drm_load(struct drm_device *dev, unsigned long flags)
87 const struct platform_device_id *id;
88 struct armada_private *priv;
89 struct resource *res[ARRAY_SIZE(priv->dcrtc)];
90 struct resource *mem = NULL;
93 memset(res, 0, sizeof(res));
95 for (n = i = 0; ; n++) {
96 struct resource *r = platform_get_resource(dev->platformdev,
101 /* Resources above 64K are graphics memory */
102 if (resource_size(r) > SZ_64K)
104 else if (i < ARRAY_SIZE(priv->dcrtc))
113 if (!devm_request_mem_region(dev->dev, mem->start,
114 resource_size(mem), "armada-drm"))
117 priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
119 DRM_ERROR("failed to allocate private\n");
123 dev->dev_private = priv;
125 /* Get the implementation specific driver data. */
126 id = platform_get_device_id(dev->platformdev);
130 priv->variant = (struct armada_variant *)id->driver_data;
132 ret = priv->variant->init(priv, dev->dev);
136 INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
137 INIT_KFIFO(priv->fb_unref);
139 /* Mode setting support */
140 drm_mode_config_init(dev);
141 dev->mode_config.min_width = 320;
142 dev->mode_config.min_height = 200;
145 * With vscale enabled, the maximum width is 1920 due to the
146 * 1920 by 3 lines RAM
148 dev->mode_config.max_width = 1920;
149 dev->mode_config.max_height = 2048;
151 dev->mode_config.preferred_depth = 24;
152 dev->mode_config.funcs = &armada_drm_mode_config_funcs;
153 drm_mm_init(&priv->linear, mem->start, resource_size(mem));
155 /* Create all LCD controllers */
156 for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) {
160 ret = armada_drm_crtc_create(dev, n, res[n]);
165 #ifdef CONFIG_DRM_ARMADA_TDA1998X
166 ret = armada_drm_connector_slave_create(dev, &tda19988_config);
171 ret = drm_vblank_init(dev, n);
175 ret = drm_irq_install(dev);
179 dev->vblank_disable_allowed = 1;
181 ret = armada_fbdev_init(dev);
185 drm_kms_helper_poll_init(dev);
190 drm_irq_uninstall(dev);
192 drm_mode_config_cleanup(dev);
193 drm_mm_takedown(&priv->linear);
194 flush_work(&priv->fb_unref_work);
199 static int armada_drm_unload(struct drm_device *dev)
201 struct armada_private *priv = dev->dev_private;
203 drm_kms_helper_poll_fini(dev);
204 armada_fbdev_fini(dev);
205 drm_irq_uninstall(dev);
206 drm_mode_config_cleanup(dev);
207 drm_mm_takedown(&priv->linear);
208 flush_work(&priv->fb_unref_work);
209 dev->dev_private = NULL;
214 void armada_drm_vbl_event_add(struct armada_crtc *dcrtc,
215 struct armada_vbl_event *evt)
219 spin_lock_irqsave(&dcrtc->irq_lock, flags);
220 if (list_empty(&evt->node)) {
221 list_add_tail(&evt->node, &dcrtc->vbl_list);
223 drm_vblank_get(dcrtc->crtc.dev, dcrtc->num);
225 spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
228 void armada_drm_vbl_event_remove(struct armada_crtc *dcrtc,
229 struct armada_vbl_event *evt)
231 if (!list_empty(&evt->node)) {
232 list_del_init(&evt->node);
233 drm_vblank_put(dcrtc->crtc.dev, dcrtc->num);
237 void armada_drm_vbl_event_remove_unlocked(struct armada_crtc *dcrtc,
238 struct armada_vbl_event *evt)
242 spin_lock_irqsave(&dcrtc->irq_lock, flags);
243 armada_drm_vbl_event_remove(dcrtc, evt);
244 spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
247 /* These are called under the vbl_lock. */
248 static int armada_drm_enable_vblank(struct drm_device *dev, int crtc)
250 struct armada_private *priv = dev->dev_private;
251 armada_drm_crtc_enable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
255 static void armada_drm_disable_vblank(struct drm_device *dev, int crtc)
257 struct armada_private *priv = dev->dev_private;
258 armada_drm_crtc_disable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
261 static irqreturn_t armada_drm_irq_handler(int irq, void *arg)
263 struct drm_device *dev = arg;
264 struct armada_private *priv = dev->dev_private;
265 struct armada_crtc *dcrtc = priv->dcrtc[0];
266 uint32_t v, stat = readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR);
267 irqreturn_t handled = IRQ_NONE;
270 * This is rediculous - rather than writing bits to clear, we
271 * have to set the actual status register value. This is racy.
273 writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR);
275 /* Mask out those interrupts we haven't enabled */
276 v = stat & dcrtc->irq_ena;
278 if (v & (VSYNC_IRQ|GRA_FRAME_IRQ|DUMB_FRAMEDONE)) {
279 armada_drm_crtc_irq(dcrtc, stat);
280 handled = IRQ_HANDLED;
286 static int armada_drm_irq_postinstall(struct drm_device *dev)
288 struct armada_private *priv = dev->dev_private;
289 struct armada_crtc *dcrtc = priv->dcrtc[0];
291 spin_lock_irq(&dev->vbl_lock);
292 writel_relaxed(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
293 writel(0, dcrtc->base + LCD_SPU_IRQ_ISR);
294 spin_unlock_irq(&dev->vbl_lock);
299 static void armada_drm_irq_uninstall(struct drm_device *dev)
301 struct armada_private *priv = dev->dev_private;
302 struct armada_crtc *dcrtc = priv->dcrtc[0];
304 writel(0, dcrtc->base + LCD_SPU_IRQ_ENA);
307 static struct drm_ioctl_desc armada_ioctls[] = {
308 DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,
310 DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl,
312 DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl,
316 static void armada_drm_lastclose(struct drm_device *dev)
318 armada_fbdev_lastclose(dev);
321 static const struct file_operations armada_drm_fops = {
322 .owner = THIS_MODULE,
326 .unlocked_ioctl = drm_ioctl,
327 .mmap = drm_gem_mmap,
329 .release = drm_release,
332 static struct drm_driver armada_drm_driver = {
333 .load = armada_drm_load,
337 .lastclose = armada_drm_lastclose,
338 .unload = armada_drm_unload,
339 .get_vblank_counter = drm_vblank_count,
340 .enable_vblank = armada_drm_enable_vblank,
341 .disable_vblank = armada_drm_disable_vblank,
342 .irq_handler = armada_drm_irq_handler,
343 .irq_postinstall = armada_drm_irq_postinstall,
344 .irq_uninstall = armada_drm_irq_uninstall,
345 #ifdef CONFIG_DEBUG_FS
346 .debugfs_init = armada_drm_debugfs_init,
347 .debugfs_cleanup = armada_drm_debugfs_cleanup,
349 .gem_free_object = armada_gem_free_object,
350 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
351 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
352 .gem_prime_export = armada_gem_prime_export,
353 .gem_prime_import = armada_gem_prime_import,
354 .dumb_create = armada_gem_dumb_create,
355 .dumb_map_offset = armada_gem_dumb_map_offset,
356 .dumb_destroy = armada_gem_dumb_destroy,
357 .gem_vm_ops = &armada_gem_vm_ops,
360 .name = "armada-drm",
361 .desc = "Armada SoC DRM",
363 .driver_features = DRIVER_GEM | DRIVER_MODESET |
364 DRIVER_HAVE_IRQ | DRIVER_PRIME,
365 .ioctls = armada_ioctls,
366 .fops = &armada_drm_fops,
369 static int armada_drm_probe(struct platform_device *pdev)
371 return drm_platform_init(&armada_drm_driver, pdev);
374 static int armada_drm_remove(struct platform_device *pdev)
376 drm_platform_exit(&armada_drm_driver, pdev);
380 static const struct platform_device_id armada_drm_platform_ids[] = {
382 .name = "armada-drm",
383 .driver_data = (unsigned long)&armada510_ops,
385 .name = "armada-510-drm",
386 .driver_data = (unsigned long)&armada510_ops,
390 MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
392 static struct platform_driver armada_drm_platform_driver = {
393 .probe = armada_drm_probe,
394 .remove = armada_drm_remove,
396 .name = "armada-drm",
397 .owner = THIS_MODULE,
399 .id_table = armada_drm_platform_ids,
402 static int __init armada_drm_init(void)
404 armada_drm_driver.num_ioctls = DRM_ARRAY_SIZE(armada_ioctls);
405 return platform_driver_register(&armada_drm_platform_driver);
407 module_init(armada_drm_init);
409 static void __exit armada_drm_exit(void)
411 platform_driver_unregister(&armada_drm_platform_driver);
413 module_exit(armada_drm_exit);
415 MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
416 MODULE_DESCRIPTION("Armada DRM Driver");
417 MODULE_LICENSE("GPL");
418 MODULE_ALIAS("platform:armada-drm");