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96f60e37 RK |
1 | /* |
2 | * Copyright (C) 2012 Russell King | |
3 | * | |
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. | |
7 | */ | |
8 | #include <linux/clk.h> | |
9 | #include <linux/module.h> | |
10 | #include <drm/drmP.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" | |
18 | ||
585b691e RK |
19 | #ifdef CONFIG_DRM_ARMADA_TDA1998X |
20 | #include <drm/i2c/tda998x.h> | |
21 | #include "armada_slave.h" | |
22 | ||
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] | |
29 | */ | |
30 | .swap_a = 2, | |
31 | .swap_b = 3, | |
32 | .swap_c = 4, | |
33 | .swap_d = 5, | |
34 | .swap_e = 0, | |
35 | .swap_f = 1, | |
36 | .audio_cfg = BIT(2), | |
37 | .audio_frame[1] = 1, | |
38 | .audio_format = AFMT_SPDIF, | |
39 | .audio_sample_rate = 44100, | |
40 | }; | |
41 | ||
42 | static const struct armada_drm_slave_config tda19988_config = { | |
43 | .i2c_adapter_id = 0, | |
44 | .crtcs = 1 << 0, /* Only LCD0 at the moment */ | |
45 | .polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT, | |
46 | .interlace_allowed = true, | |
47 | .info = { | |
48 | .type = "tda998x", | |
49 | .addr = 0x70, | |
50 | .platform_data = ¶ms, | |
51 | }, | |
52 | }; | |
53 | #endif | |
54 | ||
96f60e37 RK |
55 | static void armada_drm_unref_work(struct work_struct *work) |
56 | { | |
57 | struct armada_private *priv = | |
58 | container_of(work, struct armada_private, fb_unref_work); | |
59 | struct drm_framebuffer *fb; | |
60 | ||
61 | while (kfifo_get(&priv->fb_unref, &fb)) | |
62 | drm_framebuffer_unreference(fb); | |
63 | } | |
64 | ||
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) | |
68 | { | |
69 | struct armada_private *priv = dev->dev_private; | |
70 | ||
71 | /* | |
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. | |
77 | */ | |
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); | |
81 | } | |
82 | ||
83 | void armada_drm_queue_unref_work(struct drm_device *dev, | |
84 | struct drm_framebuffer *fb) | |
85 | { | |
86 | unsigned long flags; | |
87 | ||
88 | spin_lock_irqsave(&dev->event_lock, flags); | |
89 | __armada_drm_queue_unref_work(dev, fb); | |
90 | spin_unlock_irqrestore(&dev->event_lock, flags); | |
91 | } | |
92 | ||
93 | static int armada_drm_load(struct drm_device *dev, unsigned long flags) | |
94 | { | |
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; | |
99 | int ret, n, i; | |
100 | ||
101 | memset(res, 0, sizeof(res)); | |
102 | ||
103 | for (n = i = 0; ; n++) { | |
104 | struct resource *r = platform_get_resource(dev->platformdev, | |
105 | IORESOURCE_MEM, n); | |
106 | if (!r) | |
107 | break; | |
108 | ||
109 | /* Resources above 64K are graphics memory */ | |
110 | if (resource_size(r) > SZ_64K) | |
111 | mem = r; | |
112 | else if (i < ARRAY_SIZE(priv->dcrtc)) | |
113 | res[i++] = r; | |
114 | else | |
115 | return -EINVAL; | |
116 | } | |
117 | ||
118 | if (!res[0] || !mem) | |
119 | return -ENXIO; | |
120 | ||
121 | if (!devm_request_mem_region(dev->dev, mem->start, | |
122 | resource_size(mem), "armada-drm")) | |
123 | return -EBUSY; | |
124 | ||
125 | priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL); | |
126 | if (!priv) { | |
127 | DRM_ERROR("failed to allocate private\n"); | |
128 | return -ENOMEM; | |
129 | } | |
130 | ||
131 | dev->dev_private = priv; | |
132 | ||
133 | /* Get the implementation specific driver data. */ | |
134 | id = platform_get_device_id(dev->platformdev); | |
135 | if (!id) | |
136 | return -ENXIO; | |
137 | ||
138 | priv->variant = (struct armada_variant *)id->driver_data; | |
139 | ||
140 | ret = priv->variant->init(priv, dev->dev); | |
141 | if (ret) | |
142 | return ret; | |
143 | ||
144 | INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work); | |
145 | INIT_KFIFO(priv->fb_unref); | |
146 | ||
147 | /* Mode setting support */ | |
148 | drm_mode_config_init(dev); | |
149 | dev->mode_config.min_width = 320; | |
150 | dev->mode_config.min_height = 200; | |
151 | ||
152 | /* | |
153 | * With vscale enabled, the maximum width is 1920 due to the | |
154 | * 1920 by 3 lines RAM | |
155 | */ | |
156 | dev->mode_config.max_width = 1920; | |
157 | dev->mode_config.max_height = 2048; | |
158 | ||
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)); | |
162 | ||
163 | /* Create all LCD controllers */ | |
164 | for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) { | |
165 | if (!res[n]) | |
166 | break; | |
167 | ||
168 | ret = armada_drm_crtc_create(dev, n, res[n]); | |
169 | if (ret) | |
170 | goto err_kms; | |
171 | } | |
172 | ||
585b691e RK |
173 | #ifdef CONFIG_DRM_ARMADA_TDA1998X |
174 | ret = armada_drm_connector_slave_create(dev, &tda19988_config); | |
175 | if (ret) | |
176 | goto err_kms; | |
177 | #endif | |
178 | ||
96f60e37 RK |
179 | ret = drm_vblank_init(dev, n); |
180 | if (ret) | |
181 | goto err_kms; | |
182 | ||
183 | ret = drm_irq_install(dev); | |
184 | if (ret) | |
185 | goto err_kms; | |
186 | ||
187 | dev->vblank_disable_allowed = 1; | |
188 | ||
189 | ret = armada_fbdev_init(dev); | |
190 | if (ret) | |
191 | goto err_irq; | |
192 | ||
193 | drm_kms_helper_poll_init(dev); | |
194 | ||
195 | return 0; | |
196 | ||
197 | err_irq: | |
198 | drm_irq_uninstall(dev); | |
199 | err_kms: | |
200 | drm_mode_config_cleanup(dev); | |
201 | drm_mm_takedown(&priv->linear); | |
202 | flush_work(&priv->fb_unref_work); | |
203 | ||
204 | return ret; | |
205 | } | |
206 | ||
207 | static int armada_drm_unload(struct drm_device *dev) | |
208 | { | |
209 | struct armada_private *priv = dev->dev_private; | |
210 | ||
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; | |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
222 | void armada_drm_vbl_event_add(struct armada_crtc *dcrtc, | |
223 | struct armada_vbl_event *evt) | |
224 | { | |
225 | unsigned long flags; | |
226 | ||
227 | spin_lock_irqsave(&dcrtc->irq_lock, flags); | |
228 | if (list_empty(&evt->node)) { | |
229 | list_add_tail(&evt->node, &dcrtc->vbl_list); | |
230 | ||
231 | drm_vblank_get(dcrtc->crtc.dev, dcrtc->num); | |
232 | } | |
233 | spin_unlock_irqrestore(&dcrtc->irq_lock, flags); | |
234 | } | |
235 | ||
236 | void armada_drm_vbl_event_remove(struct armada_crtc *dcrtc, | |
237 | struct armada_vbl_event *evt) | |
238 | { | |
239 | if (!list_empty(&evt->node)) { | |
240 | list_del_init(&evt->node); | |
241 | drm_vblank_put(dcrtc->crtc.dev, dcrtc->num); | |
242 | } | |
243 | } | |
244 | ||
245 | void armada_drm_vbl_event_remove_unlocked(struct armada_crtc *dcrtc, | |
246 | struct armada_vbl_event *evt) | |
247 | { | |
248 | unsigned long flags; | |
249 | ||
250 | spin_lock_irqsave(&dcrtc->irq_lock, flags); | |
251 | armada_drm_vbl_event_remove(dcrtc, evt); | |
252 | spin_unlock_irqrestore(&dcrtc->irq_lock, flags); | |
253 | } | |
254 | ||
255 | /* These are called under the vbl_lock. */ | |
256 | static int armada_drm_enable_vblank(struct drm_device *dev, int crtc) | |
257 | { | |
258 | struct armada_private *priv = dev->dev_private; | |
259 | armada_drm_crtc_enable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA); | |
260 | return 0; | |
261 | } | |
262 | ||
263 | static void armada_drm_disable_vblank(struct drm_device *dev, int crtc) | |
264 | { | |
265 | struct armada_private *priv = dev->dev_private; | |
266 | armada_drm_crtc_disable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA); | |
267 | } | |
268 | ||
269 | static irqreturn_t armada_drm_irq_handler(int irq, void *arg) | |
270 | { | |
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; | |
276 | ||
277 | /* | |
278 | * This is rediculous - rather than writing bits to clear, we | |
279 | * have to set the actual status register value. This is racy. | |
280 | */ | |
281 | writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR); | |
282 | ||
283 | /* Mask out those interrupts we haven't enabled */ | |
284 | v = stat & dcrtc->irq_ena; | |
285 | ||
286 | if (v & (VSYNC_IRQ|GRA_FRAME_IRQ|DUMB_FRAMEDONE)) { | |
287 | armada_drm_crtc_irq(dcrtc, stat); | |
288 | handled = IRQ_HANDLED; | |
289 | } | |
290 | ||
291 | return handled; | |
292 | } | |
293 | ||
294 | static int armada_drm_irq_postinstall(struct drm_device *dev) | |
295 | { | |
296 | struct armada_private *priv = dev->dev_private; | |
297 | struct armada_crtc *dcrtc = priv->dcrtc[0]; | |
298 | ||
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); | |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
307 | static void armada_drm_irq_uninstall(struct drm_device *dev) | |
308 | { | |
309 | struct armada_private *priv = dev->dev_private; | |
310 | struct armada_crtc *dcrtc = priv->dcrtc[0]; | |
311 | ||
312 | writel(0, dcrtc->base + LCD_SPU_IRQ_ENA); | |
313 | } | |
314 | ||
315 | static struct drm_ioctl_desc armada_ioctls[] = { | |
316 | DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl, | |
317 | DRM_UNLOCKED), | |
318 | DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, | |
319 | DRM_UNLOCKED), | |
320 | DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, | |
321 | DRM_UNLOCKED), | |
322 | }; | |
323 | ||
2f5ae490 RK |
324 | static void armada_drm_lastclose(struct drm_device *dev) |
325 | { | |
326 | armada_fbdev_lastclose(dev); | |
327 | } | |
328 | ||
96f60e37 RK |
329 | static const struct file_operations armada_drm_fops = { |
330 | .owner = THIS_MODULE, | |
331 | .llseek = no_llseek, | |
332 | .read = drm_read, | |
333 | .poll = drm_poll, | |
334 | .unlocked_ioctl = drm_ioctl, | |
335 | .mmap = drm_gem_mmap, | |
336 | .open = drm_open, | |
337 | .release = drm_release, | |
338 | }; | |
339 | ||
340 | static struct drm_driver armada_drm_driver = { | |
341 | .load = armada_drm_load, | |
342 | .open = NULL, | |
343 | .preclose = NULL, | |
344 | .postclose = NULL, | |
2f5ae490 | 345 | .lastclose = armada_drm_lastclose, |
96f60e37 RK |
346 | .unload = armada_drm_unload, |
347 | .get_vblank_counter = drm_vblank_count, | |
348 | .enable_vblank = armada_drm_enable_vblank, | |
349 | .disable_vblank = armada_drm_disable_vblank, | |
350 | .irq_handler = armada_drm_irq_handler, | |
351 | .irq_postinstall = armada_drm_irq_postinstall, | |
352 | .irq_uninstall = armada_drm_irq_uninstall, | |
353 | #ifdef CONFIG_DEBUG_FS | |
354 | .debugfs_init = armada_drm_debugfs_init, | |
355 | .debugfs_cleanup = armada_drm_debugfs_cleanup, | |
356 | #endif | |
96f60e37 RK |
357 | .gem_free_object = armada_gem_free_object, |
358 | .prime_handle_to_fd = drm_gem_prime_handle_to_fd, | |
359 | .prime_fd_to_handle = drm_gem_prime_fd_to_handle, | |
360 | .gem_prime_export = armada_gem_prime_export, | |
361 | .gem_prime_import = armada_gem_prime_import, | |
362 | .dumb_create = armada_gem_dumb_create, | |
363 | .dumb_map_offset = armada_gem_dumb_map_offset, | |
364 | .dumb_destroy = armada_gem_dumb_destroy, | |
365 | .gem_vm_ops = &armada_gem_vm_ops, | |
366 | .major = 1, | |
367 | .minor = 0, | |
368 | .name = "armada-drm", | |
369 | .desc = "Armada SoC DRM", | |
370 | .date = "20120730", | |
371 | .driver_features = DRIVER_GEM | DRIVER_MODESET | | |
372 | DRIVER_HAVE_IRQ | DRIVER_PRIME, | |
373 | .ioctls = armada_ioctls, | |
374 | .fops = &armada_drm_fops, | |
375 | }; | |
376 | ||
377 | static int armada_drm_probe(struct platform_device *pdev) | |
378 | { | |
379 | return drm_platform_init(&armada_drm_driver, pdev); | |
380 | } | |
381 | ||
382 | static int armada_drm_remove(struct platform_device *pdev) | |
383 | { | |
384 | drm_platform_exit(&armada_drm_driver, pdev); | |
385 | return 0; | |
386 | } | |
387 | ||
388 | static const struct platform_device_id armada_drm_platform_ids[] = { | |
389 | { | |
390 | .name = "armada-drm", | |
391 | .driver_data = (unsigned long)&armada510_ops, | |
392 | }, { | |
393 | .name = "armada-510-drm", | |
394 | .driver_data = (unsigned long)&armada510_ops, | |
395 | }, | |
396 | { }, | |
397 | }; | |
398 | MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids); | |
399 | ||
400 | static struct platform_driver armada_drm_platform_driver = { | |
401 | .probe = armada_drm_probe, | |
402 | .remove = armada_drm_remove, | |
403 | .driver = { | |
404 | .name = "armada-drm", | |
405 | .owner = THIS_MODULE, | |
406 | }, | |
407 | .id_table = armada_drm_platform_ids, | |
408 | }; | |
409 | ||
410 | static int __init armada_drm_init(void) | |
411 | { | |
412 | armada_drm_driver.num_ioctls = DRM_ARRAY_SIZE(armada_ioctls); | |
413 | return platform_driver_register(&armada_drm_platform_driver); | |
414 | } | |
415 | module_init(armada_drm_init); | |
416 | ||
417 | static void __exit armada_drm_exit(void) | |
418 | { | |
419 | platform_driver_unregister(&armada_drm_platform_driver); | |
420 | } | |
421 | module_exit(armada_drm_exit); | |
422 | ||
423 | MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>"); | |
424 | MODULE_DESCRIPTION("Armada DRM Driver"); | |
425 | MODULE_LICENSE("GPL"); | |
426 | MODULE_ALIAS("platform:armada-drm"); |