1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
|
/*
* Copyright 2015 Freescale Semiconductor, Inc.
*
* Freescale DCU drm device driver
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/io.h>
#include <linux/mfd/syscon.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include "fsl_dcu_drm_crtc.h"
#include "fsl_dcu_drm_drv.h"
#include "fsl_tcon.h"
static bool fsl_dcu_drm_is_volatile_reg(struct device *dev, unsigned int reg)
{
if (reg == DCU_INT_STATUS || reg == DCU_UPDATE_MODE)
return true;
return false;
}
static const struct regmap_config fsl_dcu_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.cache_type = REGCACHE_RBTREE,
.volatile_reg = fsl_dcu_drm_is_volatile_reg,
};
static int fsl_dcu_drm_irq_init(struct drm_device *dev)
{
struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
int ret;
ret = drm_irq_install(dev, fsl_dev->irq);
if (ret < 0)
dev_err(dev->dev, "failed to install IRQ handler\n");
regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0);
regmap_write(fsl_dev->regmap, DCU_INT_MASK, ~0);
regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
DCU_UPDATE_MODE_READREG);
return ret;
}
static int fsl_dcu_load(struct drm_device *dev, unsigned long flags)
{
struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
int ret;
ret = fsl_dcu_drm_modeset_init(fsl_dev);
if (ret < 0) {
dev_err(dev->dev, "failed to initialize mode setting\n");
return ret;
}
ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
if (ret < 0) {
dev_err(dev->dev, "failed to initialize vblank\n");
goto done;
}
dev->vblank_disable_allowed = true;
ret = fsl_dcu_drm_irq_init(dev);
if (ret < 0)
goto done;
dev->irq_enabled = true;
fsl_dcu_fbdev_init(dev);
return 0;
done:
drm_kms_helper_poll_fini(dev);
if (fsl_dev->fbdev)
drm_fbdev_cma_fini(fsl_dev->fbdev);
drm_mode_config_cleanup(dev);
drm_vblank_cleanup(dev);
drm_irq_uninstall(dev);
dev->dev_private = NULL;
return ret;
}
static int fsl_dcu_unload(struct drm_device *dev)
{
struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
drm_kms_helper_poll_fini(dev);
if (fsl_dev->fbdev)
drm_fbdev_cma_fini(fsl_dev->fbdev);
drm_mode_config_cleanup(dev);
drm_vblank_cleanup(dev);
drm_irq_uninstall(dev);
dev->dev_private = NULL;
return 0;
}
static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
{
struct drm_device *dev = arg;
struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
unsigned int int_status;
int ret;
ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status);
if (ret) {
dev_err(dev->dev, "read DCU_INT_STATUS failed\n");
return IRQ_NONE;
}
if (int_status & DCU_INT_STATUS_VBLANK)
drm_handle_vblank(dev, 0);
regmap_write(fsl_dev->regmap, DCU_INT_STATUS, int_status);
regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
DCU_UPDATE_MODE_READREG);
return IRQ_HANDLED;
}
static int fsl_dcu_drm_enable_vblank(struct drm_device *dev, unsigned int pipe)
{
struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
unsigned int value;
regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
value &= ~DCU_INT_MASK_VBLANK;
regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
return 0;
}
static void fsl_dcu_drm_disable_vblank(struct drm_device *dev,
unsigned int pipe)
{
struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
unsigned int value;
regmap_read(fsl_dev->regmap, DCU_INT_MASK, &value);
value |= DCU_INT_MASK_VBLANK;
regmap_write(fsl_dev->regmap, DCU_INT_MASK, value);
}
static const struct file_operations fsl_dcu_drm_fops = {
.owner = THIS_MODULE,
.open = drm_open,
.release = drm_release,
.unlocked_ioctl = drm_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = drm_compat_ioctl,
#endif
.poll = drm_poll,
.read = drm_read,
.llseek = no_llseek,
.mmap = drm_gem_cma_mmap,
};
static struct drm_driver fsl_dcu_drm_driver = {
.driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET
| DRIVER_PRIME | DRIVER_ATOMIC,
.load = fsl_dcu_load,
.unload = fsl_dcu_unload,
.irq_handler = fsl_dcu_drm_irq,
.get_vblank_counter = drm_vblank_no_hw_counter,
.enable_vblank = fsl_dcu_drm_enable_vblank,
.disable_vblank = fsl_dcu_drm_disable_vblank,
.gem_free_object = drm_gem_cma_free_object,
.gem_vm_ops = &drm_gem_cma_vm_ops,
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
.gem_prime_import = drm_gem_prime_import,
.gem_prime_export = drm_gem_prime_export,
.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
.gem_prime_vmap = drm_gem_cma_prime_vmap,
.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
.gem_prime_mmap = drm_gem_cma_prime_mmap,
.dumb_create = drm_gem_cma_dumb_create,
.dumb_map_offset = drm_gem_cma_dumb_map_offset,
.dumb_destroy = drm_gem_dumb_destroy,
.fops = &fsl_dcu_drm_fops,
.name = "fsl-dcu-drm",
.desc = "Freescale DCU DRM",
.date = "20150213",
.major = 1,
.minor = 0,
};
#ifdef CONFIG_PM_SLEEP
static int fsl_dcu_drm_pm_suspend(struct device *dev)
{
struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
if (!fsl_dev)
return 0;
drm_kms_helper_poll_disable(fsl_dev->drm);
regcache_cache_only(fsl_dev->regmap, true);
regcache_mark_dirty(fsl_dev->regmap);
clk_disable(fsl_dev->clk);
clk_unprepare(fsl_dev->clk);
return 0;
}
static int fsl_dcu_drm_pm_resume(struct device *dev)
{
struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
int ret;
if (!fsl_dev)
return 0;
ret = clk_enable(fsl_dev->clk);
if (ret < 0) {
dev_err(dev, "failed to enable dcu clk\n");
clk_unprepare(fsl_dev->clk);
return ret;
}
ret = clk_prepare(fsl_dev->clk);
if (ret < 0) {
dev_err(dev, "failed to prepare dcu clk\n");
return ret;
}
drm_kms_helper_poll_enable(fsl_dev->drm);
regcache_cache_only(fsl_dev->regmap, false);
regcache_sync(fsl_dev->regmap);
return 0;
}
#endif
static const struct dev_pm_ops fsl_dcu_drm_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume)
};
static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = {
.name = "ls1021a",
.total_layer = 16,
.max_layer = 4,
};
static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = {
.name = "vf610",
.total_layer = 64,
.max_layer = 6,
};
static const struct of_device_id fsl_dcu_of_match[] = {
{
.compatible = "fsl,ls1021a-dcu",
.data = &fsl_dcu_ls1021a_data,
}, {
.compatible = "fsl,vf610-dcu",
.data = &fsl_dcu_vf610_data,
}, {
},
};
MODULE_DEVICE_TABLE(of, fsl_dcu_of_match);
static int fsl_dcu_drm_probe(struct platform_device *pdev)
{
struct fsl_dcu_drm_device *fsl_dev;
struct drm_device *drm;
struct device *dev = &pdev->dev;
struct resource *res;
void __iomem *base;
struct drm_driver *driver = &fsl_dcu_drm_driver;
struct clk *pix_clk_in;
char pix_clk_name[32];
const char *pix_clk_in_name;
const struct of_device_id *id;
int ret;
fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL);
if (!fsl_dev)
return -ENOMEM;
id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
if (!id)
return -ENODEV;
fsl_dev->soc = id->data;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(dev, "could not get memory IO resource\n");
return -ENODEV;
}
base = devm_ioremap_resource(dev, res);
if (IS_ERR(base)) {
ret = PTR_ERR(base);
return ret;
}
fsl_dev->irq = platform_get_irq(pdev, 0);
if (fsl_dev->irq < 0) {
dev_err(dev, "failed to get irq\n");
return -ENXIO;
}
fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
&fsl_dcu_regmap_config);
if (IS_ERR(fsl_dev->regmap)) {
dev_err(dev, "regmap init failed\n");
return PTR_ERR(fsl_dev->regmap);
}
fsl_dev->clk = devm_clk_get(dev, "dcu");
if (IS_ERR(fsl_dev->clk)) {
dev_err(dev, "failed to get dcu clock\n");
return PTR_ERR(fsl_dev->clk);
}
ret = clk_prepare_enable(fsl_dev->clk);
if (ret < 0) {
dev_err(dev, "failed to enable dcu clk\n");
return ret;
}
pix_clk_in = devm_clk_get(dev, "pix");
if (IS_ERR(pix_clk_in)) {
/* legancy binding, use dcu clock as pixel clock input */
pix_clk_in = fsl_dev->clk;
}
pix_clk_in_name = __clk_get_name(pix_clk_in);
snprintf(pix_clk_name, sizeof(pix_clk_name), "%s_pix", pix_clk_in_name);
fsl_dev->pix_clk = clk_register_divider(dev, pix_clk_name,
pix_clk_in_name, 0, base + DCU_DIV_RATIO,
0, 8, CLK_DIVIDER_ROUND_CLOSEST, NULL);
if (IS_ERR(fsl_dev->pix_clk)) {
dev_err(dev, "failed to register pix clk\n");
ret = PTR_ERR(fsl_dev->pix_clk);
goto disable_clk;
}
ret = clk_prepare_enable(fsl_dev->pix_clk);
if (ret < 0) {
dev_err(dev, "failed to enable pix clk\n");
goto unregister_pix_clk;
}
fsl_dev->tcon = fsl_tcon_init(dev);
drm = drm_dev_alloc(driver, dev);
if (!drm) {
ret = -ENOMEM;
goto disable_pix_clk;
}
fsl_dev->dev = dev;
fsl_dev->drm = drm;
fsl_dev->np = dev->of_node;
drm->dev_private = fsl_dev;
dev_set_drvdata(dev, fsl_dev);
ret = drm_dev_register(drm, 0);
if (ret < 0)
goto unref;
DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n", driver->name,
driver->major, driver->minor, driver->patchlevel,
driver->date, drm->primary->index);
return 0;
unref:
drm_dev_unref(drm);
disable_pix_clk:
clk_disable_unprepare(fsl_dev->pix_clk);
unregister_pix_clk:
clk_unregister(fsl_dev->pix_clk);
disable_clk:
clk_disable_unprepare(fsl_dev->clk);
return ret;
}
static int fsl_dcu_drm_remove(struct platform_device *pdev)
{
struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
clk_disable_unprepare(fsl_dev->clk);
clk_disable_unprepare(fsl_dev->pix_clk);
clk_unregister(fsl_dev->pix_clk);
drm_put_dev(fsl_dev->drm);
return 0;
}
static struct platform_driver fsl_dcu_drm_platform_driver = {
.probe = fsl_dcu_drm_probe,
.remove = fsl_dcu_drm_remove,
.driver = {
.name = "fsl-dcu",
.pm = &fsl_dcu_drm_pm_ops,
.of_match_table = fsl_dcu_of_match,
},
};
module_platform_driver(fsl_dcu_drm_platform_driver);
MODULE_DESCRIPTION("Freescale DCU DRM Driver");
MODULE_LICENSE("GPL");
|