summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/shmobile/shmob_drm_drv.c
blob: 1c350fc4e449715edd5ef997e6eb791722d0f604 (plain)
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
/*
 * shmob_drm_drv.c  --  SH Mobile DRM driver
 *
 * Copyright (C) 2012 Renesas Corporation
 *
 * Laurent Pinchart (laurent.pinchart@ideasonboard.com)
 *
 * 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/io.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/slab.h>

#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_gem_cma_helper.h>

#include "shmob_drm_crtc.h"
#include "shmob_drm_drv.h"
#include "shmob_drm_kms.h"
#include "shmob_drm_plane.h"
#include "shmob_drm_regs.h"

/* -----------------------------------------------------------------------------
 * Hardware initialization
 */

static int __devinit shmob_drm_init_interface(struct shmob_drm_device *sdev)
{
	static const u32 ldmt1r[] = {
		[SHMOB_DRM_IFACE_RGB8] = LDMT1R_MIFTYP_RGB8,
		[SHMOB_DRM_IFACE_RGB9] = LDMT1R_MIFTYP_RGB9,
		[SHMOB_DRM_IFACE_RGB12A] = LDMT1R_MIFTYP_RGB12A,
		[SHMOB_DRM_IFACE_RGB12B] = LDMT1R_MIFTYP_RGB12B,
		[SHMOB_DRM_IFACE_RGB16] = LDMT1R_MIFTYP_RGB16,
		[SHMOB_DRM_IFACE_RGB18] = LDMT1R_MIFTYP_RGB18,
		[SHMOB_DRM_IFACE_RGB24] = LDMT1R_MIFTYP_RGB24,
		[SHMOB_DRM_IFACE_YUV422] = LDMT1R_MIFTYP_YCBCR,
		[SHMOB_DRM_IFACE_SYS8A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8A,
		[SHMOB_DRM_IFACE_SYS8B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8B,
		[SHMOB_DRM_IFACE_SYS8C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8C,
		[SHMOB_DRM_IFACE_SYS8D] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS8D,
		[SHMOB_DRM_IFACE_SYS9] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS9,
		[SHMOB_DRM_IFACE_SYS12] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS12,
		[SHMOB_DRM_IFACE_SYS16A] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16A,
		[SHMOB_DRM_IFACE_SYS16B] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16B,
		[SHMOB_DRM_IFACE_SYS16C] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS16C,
		[SHMOB_DRM_IFACE_SYS18] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS18,
		[SHMOB_DRM_IFACE_SYS24] = LDMT1R_IFM | LDMT1R_MIFTYP_SYS24,
	};

	if (sdev->pdata->iface.interface >= ARRAY_SIZE(ldmt1r)) {
		dev_err(sdev->dev, "invalid interface type %u\n",
			sdev->pdata->iface.interface);
		return -EINVAL;
	}

	sdev->ldmt1r = ldmt1r[sdev->pdata->iface.interface];
	return 0;
}

static int __devinit shmob_drm_setup_clocks(struct shmob_drm_device *sdev,
					    enum shmob_drm_clk_source clksrc)
{
	struct clk *clk;
	char *clkname;

	switch (clksrc) {
	case SHMOB_DRM_CLK_BUS:
		clkname = "bus_clk";
		sdev->lddckr = LDDCKR_ICKSEL_BUS;
		break;
	case SHMOB_DRM_CLK_PERIPHERAL:
		clkname = "peripheral_clk";
		sdev->lddckr = LDDCKR_ICKSEL_MIPI;
		break;
	case SHMOB_DRM_CLK_EXTERNAL:
		clkname = NULL;
		sdev->lddckr = LDDCKR_ICKSEL_HDMI;
		break;
	default:
		return -EINVAL;
	}

	clk = clk_get(sdev->dev, clkname);
	if (IS_ERR(clk)) {
		dev_err(sdev->dev, "cannot get dot clock %s\n", clkname);
		return PTR_ERR(clk);
	}

	sdev->clock = clk;
	return 0;
}

/* -----------------------------------------------------------------------------
 * DRM operations
 */

static int shmob_drm_unload(struct drm_device *dev)
{
	struct shmob_drm_device *sdev = dev->dev_private;

	drm_kms_helper_poll_fini(dev);
	drm_mode_config_cleanup(dev);
	drm_vblank_cleanup(dev);
	drm_irq_uninstall(dev);

	if (sdev->clock)
		clk_put(sdev->clock);

	if (sdev->mmio)
		iounmap(sdev->mmio);

	dev->dev_private = NULL;
	kfree(sdev);

	return 0;
}

static int shmob_drm_load(struct drm_device *dev, unsigned long flags)
{
	struct shmob_drm_platform_data *pdata = dev->dev->platform_data;
	struct platform_device *pdev = dev->platformdev;
	struct shmob_drm_device *sdev;
	struct resource *res;
	unsigned int i;
	int ret;

	if (pdata == NULL) {
		dev_err(dev->dev, "no platform data\n");
		return -EINVAL;
	}

	sdev = kzalloc(sizeof(*sdev), GFP_KERNEL);
	if (sdev == NULL) {
		dev_err(dev->dev, "failed to allocate private data\n");
		return -ENOMEM;
	}

	sdev->dev = &pdev->dev;
	sdev->pdata = pdata;
	spin_lock_init(&sdev->irq_lock);

	sdev->ddev = dev;
	dev->dev_private = sdev;

	/* I/O resources and clocks */
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (res == NULL) {
		dev_err(&pdev->dev, "failed to get memory resource\n");
		ret = -EINVAL;
		goto done;
	}

	sdev->mmio = ioremap_nocache(res->start, resource_size(res));
	if (sdev->mmio == NULL) {
		dev_err(&pdev->dev, "failed to remap memory resource\n");
		ret = -ENOMEM;
		goto done;
	}

	ret = shmob_drm_setup_clocks(sdev, pdata->clk_source);
	if (ret < 0)
		goto done;

	ret = shmob_drm_init_interface(sdev);
	if (ret < 0)
		goto done;

	ret = shmob_drm_modeset_init(sdev);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to initialize mode setting\n");
		goto done;
	}

	for (i = 0; i < 4; ++i) {
		ret = shmob_drm_plane_create(sdev, i);
		if (ret < 0) {
			dev_err(&pdev->dev, "failed to create plane %u\n", i);
			goto done;
		}
	}

	ret = drm_vblank_init(dev, 1);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to initialize vblank\n");
		goto done;
	}

	ret = drm_irq_install(dev);
	if (ret < 0) {
		dev_err(&pdev->dev, "failed to install IRQ handler\n");
		goto done;
	}

	platform_set_drvdata(pdev, sdev);

done:
	if (ret)
		shmob_drm_unload(dev);

	return ret;
}

static void shmob_drm_preclose(struct drm_device *dev, struct drm_file *file)
{
	struct shmob_drm_device *sdev = dev->dev_private;

	shmob_drm_crtc_cancel_page_flip(&sdev->crtc, file);
}

static irqreturn_t shmob_drm_irq(int irq, void *arg)
{
	struct drm_device *dev = arg;
	struct shmob_drm_device *sdev = dev->dev_private;
	unsigned long flags;
	u32 status;

	/* Acknowledge interrupts. Putting interrupt enable and interrupt flag
	 * bits in the same register is really brain-dead design and requires
	 * taking a spinlock.
	 */
	spin_lock_irqsave(&sdev->irq_lock, flags);
	status = lcdc_read(sdev, LDINTR);
	lcdc_write(sdev, LDINTR, status ^ LDINTR_STATUS_MASK);
	spin_unlock_irqrestore(&sdev->irq_lock, flags);

	if (status & LDINTR_VES) {
		drm_handle_vblank(dev, 0);
		shmob_drm_crtc_finish_page_flip(&sdev->crtc);
	}

	return IRQ_HANDLED;
}

static int shmob_drm_enable_vblank(struct drm_device *dev, int crtc)
{
	struct shmob_drm_device *sdev = dev->dev_private;

	shmob_drm_crtc_enable_vblank(sdev, true);

	return 0;
}

static void shmob_drm_disable_vblank(struct drm_device *dev, int crtc)
{
	struct shmob_drm_device *sdev = dev->dev_private;

	shmob_drm_crtc_enable_vblank(sdev, false);
}

static const struct file_operations shmob_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,
	.fasync		= drm_fasync,
	.llseek		= no_llseek,
	.mmap		= drm_gem_cma_mmap,
};

static struct drm_driver shmob_drm_driver = {
	.driver_features	= DRIVER_HAVE_IRQ | DRIVER_GEM | DRIVER_MODESET,
	.load			= shmob_drm_load,
	.unload			= shmob_drm_unload,
	.preclose		= shmob_drm_preclose,
	.irq_handler		= shmob_drm_irq,
	.get_vblank_counter	= drm_vblank_count,
	.enable_vblank		= shmob_drm_enable_vblank,
	.disable_vblank		= shmob_drm_disable_vblank,
	.gem_free_object	= drm_gem_cma_free_object,
	.gem_vm_ops		= &drm_gem_cma_vm_ops,
	.dumb_create		= drm_gem_cma_dumb_create,
	.dumb_map_offset	= drm_gem_cma_dumb_map_offset,
	.dumb_destroy		= drm_gem_cma_dumb_destroy,
	.fops			= &shmob_drm_fops,
	.name			= "shmob-drm",
	.desc			= "Renesas SH Mobile DRM",
	.date			= "20120424",
	.major			= 1,
	.minor			= 0,
};

/* -----------------------------------------------------------------------------
 * Power management
 */

#if CONFIG_PM_SLEEP
static int shmob_drm_pm_suspend(struct device *dev)
{
	struct shmob_drm_device *sdev = dev_get_drvdata(dev);

	drm_kms_helper_poll_disable(sdev->ddev);
	shmob_drm_crtc_suspend(&sdev->crtc);

	return 0;
}

static int shmob_drm_pm_resume(struct device *dev)
{
	struct shmob_drm_device *sdev = dev_get_drvdata(dev);

	mutex_lock(&sdev->ddev->mode_config.mutex);
	shmob_drm_crtc_resume(&sdev->crtc);
	mutex_unlock(&sdev->ddev->mode_config.mutex);

	drm_kms_helper_poll_enable(sdev->ddev);
	return 0;
}
#endif

static const struct dev_pm_ops shmob_drm_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(shmob_drm_pm_suspend, shmob_drm_pm_resume)
};

/* -----------------------------------------------------------------------------
 * Platform driver
 */

static int __devinit shmob_drm_probe(struct platform_device *pdev)
{
	return drm_platform_init(&shmob_drm_driver, pdev);
}

static int __devexit shmob_drm_remove(struct platform_device *pdev)
{
	drm_platform_exit(&shmob_drm_driver, pdev);

	return 0;
}

static struct platform_driver shmob_drm_platform_driver = {
	.probe		= shmob_drm_probe,
	.remove		= __devexit_p(shmob_drm_remove),
	.driver		= {
		.owner	= THIS_MODULE,
		.name	= "shmob-drm",
		.pm	= &shmob_drm_pm_ops,
	},
};

module_platform_driver(shmob_drm_platform_driver);

MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
MODULE_DESCRIPTION("Renesas SH Mobile DRM Driver");
MODULE_LICENSE("GPL");