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109eee2f JW |
1 | /* |
2 | * Copyright 2015 Freescale Semiconductor, Inc. | |
3 | * | |
4 | * Freescale DCU drm device driver | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #include <linux/clk.h> | |
13 | #include <linux/clk-provider.h> | |
14 | #include <linux/io.h> | |
15 | #include <linux/mfd/syscon.h> | |
16 | #include <linux/mm.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/of_platform.h> | |
19 | #include <linux/platform_device.h> | |
20 | #include <linux/pm.h> | |
21 | #include <linux/pm_runtime.h> | |
22 | #include <linux/regmap.h> | |
23 | ||
24 | #include <drm/drmP.h> | |
25 | #include <drm/drm_crtc_helper.h> | |
26 | #include <drm/drm_gem_cma_helper.h> | |
27 | ||
28 | #include "fsl_dcu_drm_crtc.h" | |
29 | #include "fsl_dcu_drm_drv.h" | |
30 | ||
31 | static const struct regmap_config fsl_dcu_regmap_config = { | |
32 | .reg_bits = 32, | |
33 | .reg_stride = 4, | |
34 | .val_bits = 32, | |
35 | .cache_type = REGCACHE_RBTREE, | |
36 | }; | |
37 | ||
38 | static int fsl_dcu_drm_irq_init(struct drm_device *dev) | |
39 | { | |
40 | struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; | |
41 | unsigned int value; | |
42 | int ret; | |
43 | ||
44 | ret = drm_irq_install(dev, fsl_dev->irq); | |
45 | if (ret < 0) | |
46 | dev_err(dev->dev, "failed to install IRQ handler\n"); | |
47 | ||
48 | ret = regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0); | |
49 | if (ret) | |
50 | dev_err(dev->dev, "set DCU_INT_STATUS failed\n"); | |
51 | ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value); | |
52 | if (ret) | |
53 | dev_err(dev->dev, "read DCU_INT_MASK failed\n"); | |
54 | value &= DCU_INT_MASK_VBLANK; | |
55 | ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value); | |
56 | if (ret) | |
57 | dev_err(dev->dev, "set DCU_INT_MASK failed\n"); | |
58 | ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE, | |
59 | DCU_UPDATE_MODE_READREG); | |
60 | if (ret) | |
61 | dev_err(dev->dev, "set DCU_UPDATE_MODE failed\n"); | |
62 | ||
63 | return ret; | |
64 | } | |
65 | ||
66 | static int fsl_dcu_load(struct drm_device *drm, unsigned long flags) | |
67 | { | |
68 | struct device *dev = drm->dev; | |
69 | struct fsl_dcu_drm_device *fsl_dev = drm->dev_private; | |
70 | int ret; | |
71 | ||
72 | ret = fsl_dcu_drm_modeset_init(fsl_dev); | |
73 | if (ret < 0) { | |
74 | dev_err(dev, "failed to initialize mode setting\n"); | |
75 | return ret; | |
76 | } | |
77 | ||
78 | ret = drm_vblank_init(drm, drm->mode_config.num_crtc); | |
79 | if (ret < 0) { | |
80 | dev_err(dev, "failed to initialize vblank\n"); | |
81 | goto done; | |
82 | } | |
83 | drm->vblank_disable_allowed = true; | |
84 | ||
85 | ret = fsl_dcu_drm_irq_init(drm); | |
86 | if (ret < 0) | |
87 | goto done; | |
88 | drm->irq_enabled = true; | |
89 | ||
90 | fsl_dcu_fbdev_init(drm); | |
91 | ||
92 | return 0; | |
93 | done: | |
94 | if (ret) { | |
95 | drm_mode_config_cleanup(drm); | |
96 | drm_vblank_cleanup(drm); | |
97 | drm_irq_uninstall(drm); | |
98 | drm->dev_private = NULL; | |
99 | } | |
100 | ||
101 | return ret; | |
102 | } | |
103 | ||
104 | static int fsl_dcu_unload(struct drm_device *dev) | |
105 | { | |
106 | drm_mode_config_cleanup(dev); | |
107 | drm_vblank_cleanup(dev); | |
108 | drm_irq_uninstall(dev); | |
109 | ||
110 | dev->dev_private = NULL; | |
111 | ||
112 | return 0; | |
113 | } | |
114 | ||
115 | static void fsl_dcu_drm_preclose(struct drm_device *dev, struct drm_file *file) | |
116 | { | |
117 | } | |
118 | ||
119 | static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg) | |
120 | { | |
121 | struct drm_device *dev = arg; | |
122 | struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; | |
123 | unsigned int int_status; | |
124 | int ret; | |
125 | ||
126 | ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status); | |
127 | if (ret) | |
128 | dev_err(dev->dev, "set DCU_INT_STATUS failed\n"); | |
129 | if (int_status & DCU_INT_STATUS_VBLANK) | |
130 | drm_handle_vblank(dev, 0); | |
131 | ||
132 | ret = regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0xffffffff); | |
133 | if (ret) | |
134 | dev_err(dev->dev, "set DCU_INT_STATUS failed\n"); | |
135 | ret = regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE, | |
136 | DCU_UPDATE_MODE_READREG); | |
137 | if (ret) | |
138 | dev_err(dev->dev, "set DCU_UPDATE_MODE failed\n"); | |
139 | ||
140 | return IRQ_HANDLED; | |
141 | } | |
142 | ||
88e72717 | 143 | static int fsl_dcu_drm_enable_vblank(struct drm_device *dev, unsigned int pipe) |
109eee2f JW |
144 | { |
145 | struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; | |
146 | unsigned int value; | |
147 | int ret; | |
148 | ||
149 | ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value); | |
150 | if (ret) | |
151 | dev_err(dev->dev, "read DCU_INT_MASK failed\n"); | |
152 | value &= ~DCU_INT_MASK_VBLANK; | |
153 | ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value); | |
154 | if (ret) | |
155 | dev_err(dev->dev, "set DCU_INT_MASK failed\n"); | |
156 | return 0; | |
157 | } | |
158 | ||
88e72717 TR |
159 | static void fsl_dcu_drm_disable_vblank(struct drm_device *dev, |
160 | unsigned int pipe) | |
109eee2f JW |
161 | { |
162 | struct fsl_dcu_drm_device *fsl_dev = dev->dev_private; | |
163 | unsigned int value; | |
164 | int ret; | |
165 | ||
166 | ret = regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value); | |
167 | if (ret) | |
168 | dev_err(dev->dev, "read DCU_INT_MASK failed\n"); | |
169 | value |= DCU_INT_MASK_VBLANK; | |
170 | ret = regmap_write(fsl_dev->regmap, DCU_INT_MASK, value); | |
171 | if (ret) | |
172 | dev_err(dev->dev, "set DCU_INT_MASK failed\n"); | |
173 | } | |
174 | ||
175 | static const struct file_operations fsl_dcu_drm_fops = { | |
176 | .owner = THIS_MODULE, | |
177 | .open = drm_open, | |
178 | .release = drm_release, | |
179 | .unlocked_ioctl = drm_ioctl, | |
180 | #ifdef CONFIG_COMPAT | |
181 | .compat_ioctl = drm_compat_ioctl, | |
182 | #endif | |
183 | .poll = drm_poll, | |
184 | .read = drm_read, | |
185 | .llseek = no_llseek, | |
186 | .mmap = drm_gem_cma_mmap, | |
187 | }; | |
188 | ||
189 | static struct drm_driver fsl_dcu_drm_driver = { | |
190 | .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET | |
191 | | DRIVER_PRIME | DRIVER_ATOMIC, | |
192 | .load = fsl_dcu_load, | |
193 | .unload = fsl_dcu_unload, | |
194 | .preclose = fsl_dcu_drm_preclose, | |
195 | .irq_handler = fsl_dcu_drm_irq, | |
b44f8408 | 196 | .get_vblank_counter = drm_vblank_no_hw_counter, |
109eee2f JW |
197 | .enable_vblank = fsl_dcu_drm_enable_vblank, |
198 | .disable_vblank = fsl_dcu_drm_disable_vblank, | |
199 | .gem_free_object = drm_gem_cma_free_object, | |
200 | .gem_vm_ops = &drm_gem_cma_vm_ops, | |
201 | .prime_handle_to_fd = drm_gem_prime_handle_to_fd, | |
202 | .prime_fd_to_handle = drm_gem_prime_fd_to_handle, | |
203 | .gem_prime_import = drm_gem_prime_import, | |
204 | .gem_prime_export = drm_gem_prime_export, | |
205 | .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, | |
206 | .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, | |
207 | .gem_prime_vmap = drm_gem_cma_prime_vmap, | |
208 | .gem_prime_vunmap = drm_gem_cma_prime_vunmap, | |
209 | .gem_prime_mmap = drm_gem_cma_prime_mmap, | |
210 | .dumb_create = drm_gem_cma_dumb_create, | |
211 | .dumb_map_offset = drm_gem_cma_dumb_map_offset, | |
212 | .dumb_destroy = drm_gem_dumb_destroy, | |
213 | .fops = &fsl_dcu_drm_fops, | |
214 | .name = "fsl-dcu-drm", | |
215 | .desc = "Freescale DCU DRM", | |
216 | .date = "20150213", | |
217 | .major = 1, | |
218 | .minor = 0, | |
219 | }; | |
220 | ||
221 | #ifdef CONFIG_PM_SLEEP | |
222 | static int fsl_dcu_drm_pm_suspend(struct device *dev) | |
223 | { | |
224 | struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev); | |
225 | ||
226 | if (!fsl_dev) | |
227 | return 0; | |
228 | ||
229 | drm_kms_helper_poll_disable(fsl_dev->drm); | |
230 | regcache_cache_only(fsl_dev->regmap, true); | |
231 | regcache_mark_dirty(fsl_dev->regmap); | |
232 | clk_disable(fsl_dev->clk); | |
233 | clk_unprepare(fsl_dev->clk); | |
234 | ||
235 | return 0; | |
236 | } | |
237 | ||
238 | static int fsl_dcu_drm_pm_resume(struct device *dev) | |
239 | { | |
240 | struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev); | |
241 | int ret; | |
242 | ||
243 | if (!fsl_dev) | |
244 | return 0; | |
245 | ||
246 | ret = clk_enable(fsl_dev->clk); | |
247 | if (ret < 0) { | |
248 | dev_err(dev, "failed to enable dcu clk\n"); | |
249 | clk_unprepare(fsl_dev->clk); | |
250 | return ret; | |
251 | } | |
252 | ret = clk_prepare(fsl_dev->clk); | |
253 | if (ret < 0) { | |
254 | dev_err(dev, "failed to prepare dcu clk\n"); | |
255 | return ret; | |
256 | } | |
257 | ||
258 | drm_kms_helper_poll_enable(fsl_dev->drm); | |
259 | regcache_cache_only(fsl_dev->regmap, false); | |
260 | regcache_sync(fsl_dev->regmap); | |
261 | ||
262 | return 0; | |
263 | } | |
264 | #endif | |
265 | ||
266 | static const struct dev_pm_ops fsl_dcu_drm_pm_ops = { | |
267 | SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume) | |
268 | }; | |
269 | ||
270 | static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = { | |
271 | .name = "ls1021a", | |
272 | .total_layer = 16, | |
273 | .max_layer = 4, | |
274 | }; | |
275 | ||
276 | static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = { | |
277 | .name = "vf610", | |
278 | .total_layer = 64, | |
279 | .max_layer = 6, | |
280 | }; | |
281 | ||
282 | static const struct of_device_id fsl_dcu_of_match[] = { | |
283 | { | |
284 | .compatible = "fsl,ls1021a-dcu", | |
285 | .data = &fsl_dcu_ls1021a_data, | |
286 | }, { | |
287 | .compatible = "fsl,vf610-dcu", | |
288 | .data = &fsl_dcu_vf610_data, | |
289 | }, { | |
290 | }, | |
291 | }; | |
292 | MODULE_DEVICE_TABLE(of, fsl_dcu_of_match); | |
293 | ||
294 | static int fsl_dcu_drm_probe(struct platform_device *pdev) | |
295 | { | |
296 | struct fsl_dcu_drm_device *fsl_dev; | |
297 | struct drm_device *drm; | |
298 | struct device *dev = &pdev->dev; | |
299 | struct resource *res; | |
300 | void __iomem *base; | |
301 | struct drm_driver *driver = &fsl_dcu_drm_driver; | |
302 | const struct of_device_id *id; | |
303 | int ret; | |
304 | ||
305 | fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL); | |
306 | if (!fsl_dev) | |
307 | return -ENOMEM; | |
308 | ||
309 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
310 | if (!res) { | |
311 | dev_err(dev, "could not get memory IO resource\n"); | |
312 | return -ENODEV; | |
313 | } | |
314 | ||
315 | base = devm_ioremap_resource(dev, res); | |
316 | if (IS_ERR(base)) { | |
317 | ret = PTR_ERR(base); | |
318 | return ret; | |
319 | } | |
320 | ||
321 | fsl_dev->irq = platform_get_irq(pdev, 0); | |
322 | if (fsl_dev->irq < 0) { | |
323 | dev_err(dev, "failed to get irq\n"); | |
324 | return -ENXIO; | |
325 | } | |
326 | ||
327 | fsl_dev->clk = devm_clk_get(dev, "dcu"); | |
328 | if (IS_ERR(fsl_dev->clk)) { | |
329 | ret = PTR_ERR(fsl_dev->clk); | |
330 | dev_err(dev, "failed to get dcu clock\n"); | |
331 | return ret; | |
332 | } | |
333 | ret = clk_prepare(fsl_dev->clk); | |
334 | if (ret < 0) { | |
335 | dev_err(dev, "failed to prepare dcu clk\n"); | |
336 | return ret; | |
337 | } | |
338 | ret = clk_enable(fsl_dev->clk); | |
339 | if (ret < 0) { | |
340 | dev_err(dev, "failed to enable dcu clk\n"); | |
341 | clk_unprepare(fsl_dev->clk); | |
342 | return ret; | |
343 | } | |
344 | ||
345 | fsl_dev->regmap = devm_regmap_init_mmio(dev, base, | |
346 | &fsl_dcu_regmap_config); | |
347 | if (IS_ERR(fsl_dev->regmap)) { | |
348 | dev_err(dev, "regmap init failed\n"); | |
349 | return PTR_ERR(fsl_dev->regmap); | |
350 | } | |
351 | ||
352 | id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node); | |
353 | if (!id) | |
354 | return -ENODEV; | |
355 | fsl_dev->soc = id->data; | |
356 | ||
357 | drm = drm_dev_alloc(driver, dev); | |
358 | if (!drm) | |
359 | return -ENOMEM; | |
360 | ||
361 | fsl_dev->dev = dev; | |
362 | fsl_dev->drm = drm; | |
363 | fsl_dev->np = dev->of_node; | |
364 | drm->dev_private = fsl_dev; | |
365 | dev_set_drvdata(dev, fsl_dev); | |
366 | drm_dev_set_unique(drm, dev_name(dev)); | |
367 | ||
368 | ret = drm_dev_register(drm, 0); | |
369 | if (ret < 0) | |
370 | goto unref; | |
371 | ||
372 | DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name, | |
373 | driver->major, driver->minor, driver->patchlevel, | |
374 | driver->date, drm->primary->index); | |
375 | ||
376 | return 0; | |
377 | ||
378 | unref: | |
379 | drm_dev_unref(drm); | |
380 | return ret; | |
381 | } | |
382 | ||
383 | static int fsl_dcu_drm_remove(struct platform_device *pdev) | |
384 | { | |
385 | struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev); | |
386 | ||
387 | drm_put_dev(fsl_dev->drm); | |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
392 | static struct platform_driver fsl_dcu_drm_platform_driver = { | |
393 | .probe = fsl_dcu_drm_probe, | |
394 | .remove = fsl_dcu_drm_remove, | |
395 | .driver = { | |
396 | .name = "fsl-dcu", | |
397 | .pm = &fsl_dcu_drm_pm_ops, | |
398 | .of_match_table = fsl_dcu_of_match, | |
399 | }, | |
400 | }; | |
401 | ||
402 | module_platform_driver(fsl_dcu_drm_platform_driver); | |
403 | ||
404 | MODULE_DESCRIPTION("Freescale DCU DRM Driver"); | |
405 | MODULE_LICENSE("GPL"); |