summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/exynos/exynos_drm_crtc.c
blob: ee43cc22085304f7f07f267cd63a7d2be05d249a (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
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
/* exynos_drm_crtc.c
 *
 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
 * Authors:
 *	Inki Dae <inki.dae@samsung.com>
 *	Joonyoung Shim <jy0922.shim@samsung.com>
 *	Seung-Woo Kim <sw0312.kim@samsung.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#include "drmP.h"
#include "drm_crtc_helper.h"

#include "exynos_drm_crtc.h"
#include "exynos_drm_drv.h"
#include "exynos_drm_fb.h"
#include "exynos_drm_encoder.h"
#include "exynos_drm_gem.h"
#include "exynos_drm_buf.h"

#define to_exynos_crtc(x)	container_of(x, struct exynos_drm_crtc,\
				drm_crtc)

/*
 * Exynos specific crtc structure.
 *
 * @drm_crtc: crtc object.
 * @overlay: contain information common to display controller and hdmi and
 *	contents of this overlay object would be copied to sub driver size.
 * @pipe: a crtc index created at load() with a new crtc object creation
 *	and the crtc object would be set to private->crtc array
 *	to get a crtc object corresponding to this pipe from private->crtc
 *	array when irq interrupt occured. the reason of using this pipe is that
 *	drm framework doesn't support multiple irq yet.
 *	we can refer to the crtc to current hardware interrupt occured through
 *	this pipe value.
 */
struct exynos_drm_crtc {
	struct drm_crtc			drm_crtc;
	struct exynos_drm_overlay	overlay;
	unsigned int			pipe;
};

static void exynos_drm_crtc_apply(struct drm_crtc *crtc)
{
	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
	struct exynos_drm_overlay *overlay = &exynos_crtc->overlay;

	exynos_drm_fn_encoder(crtc, overlay,
			exynos_drm_encoder_crtc_mode_set);
	exynos_drm_fn_encoder(crtc, &exynos_crtc->pipe,
			exynos_drm_encoder_crtc_commit);
}

int exynos_drm_overlay_update(struct exynos_drm_overlay *overlay,
			      struct drm_framebuffer *fb,
			      struct drm_display_mode *mode,
			      struct exynos_drm_crtc_pos *pos)
{
	struct exynos_drm_gem_buf *buffer;
	unsigned int actual_w;
	unsigned int actual_h;

	buffer = exynos_drm_fb_get_buf(fb);
	if (!buffer) {
		DRM_LOG_KMS("buffer is null.\n");
		return -EFAULT;
	}

	overlay->dma_addr = buffer->dma_addr;
	overlay->vaddr = buffer->kvaddr;

	DRM_DEBUG_KMS("vaddr = 0x%lx, dma_addr = 0x%lx\n",
			(unsigned long)overlay->vaddr,
			(unsigned long)overlay->dma_addr);

	actual_w = min((mode->hdisplay - pos->crtc_x), pos->crtc_w);
	actual_h = min((mode->vdisplay - pos->crtc_y), pos->crtc_h);

	/* set drm framebuffer data. */
	overlay->fb_x = pos->fb_x;
	overlay->fb_y = pos->fb_y;
	overlay->fb_width = fb->width;
	overlay->fb_height = fb->height;
	overlay->bpp = fb->bits_per_pixel;
	overlay->pitch = fb->pitch;

	/* set overlay range to be displayed. */
	overlay->crtc_x = pos->crtc_x;
	overlay->crtc_y = pos->crtc_y;
	overlay->crtc_width = actual_w;
	overlay->crtc_height = actual_h;

	/* set drm mode data. */
	overlay->mode_width = mode->hdisplay;
	overlay->mode_height = mode->vdisplay;
	overlay->refresh = mode->vrefresh;
	overlay->scan_flag = mode->flags;

	DRM_DEBUG_KMS("overlay : offset_x/y(%d,%d), width/height(%d,%d)",
			overlay->crtc_x, overlay->crtc_y,
			overlay->crtc_width, overlay->crtc_height);

	return 0;
}

static int exynos_drm_crtc_update(struct drm_crtc *crtc)
{
	struct exynos_drm_crtc *exynos_crtc;
	struct exynos_drm_overlay *overlay;
	struct exynos_drm_crtc_pos pos;
	struct drm_display_mode *mode = &crtc->mode;
	struct drm_framebuffer *fb = crtc->fb;

	if (!mode || !fb)
		return -EINVAL;

	exynos_crtc = to_exynos_crtc(crtc);
	overlay = &exynos_crtc->overlay;

	memset(&pos, 0, sizeof(struct exynos_drm_crtc_pos));

	/* it means the offset of framebuffer to be displayed. */
	pos.fb_x = crtc->x;
	pos.fb_y = crtc->y;

	/* OSD position to be displayed. */
	pos.crtc_x = 0;
	pos.crtc_y = 0;
	pos.crtc_w = fb->width - crtc->x;
	pos.crtc_h = fb->height - crtc->y;

	return exynos_drm_overlay_update(overlay, crtc->fb, mode, &pos);
}

static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
{
	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);

	DRM_DEBUG_KMS("crtc[%d] mode[%d]\n", crtc->base.id, mode);

	switch (mode) {
	case DRM_MODE_DPMS_ON:
		exynos_drm_fn_encoder(crtc, &exynos_crtc->pipe,
				exynos_drm_encoder_crtc_commit);
		break;
	case DRM_MODE_DPMS_STANDBY:
	case DRM_MODE_DPMS_SUSPEND:
	case DRM_MODE_DPMS_OFF:
		/* TODO */
		exynos_drm_fn_encoder(crtc, NULL,
				exynos_drm_encoder_crtc_disable);
		break;
	default:
		DRM_DEBUG_KMS("unspecified mode %d\n", mode);
		break;
	}
}

static void exynos_drm_crtc_prepare(struct drm_crtc *crtc)
{
	DRM_DEBUG_KMS("%s\n", __FILE__);

	/* drm framework doesn't check NULL. */
}

static void exynos_drm_crtc_commit(struct drm_crtc *crtc)
{
	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);

	DRM_DEBUG_KMS("%s\n", __FILE__);

	exynos_drm_fn_encoder(crtc, &exynos_crtc->pipe,
			exynos_drm_encoder_crtc_commit);
}

static bool
exynos_drm_crtc_mode_fixup(struct drm_crtc *crtc,
			    struct drm_display_mode *mode,
			    struct drm_display_mode *adjusted_mode)
{
	DRM_DEBUG_KMS("%s\n", __FILE__);

	/* drm framework doesn't check NULL */
	return true;
}

static int
exynos_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
			  struct drm_display_mode *adjusted_mode, int x, int y,
			  struct drm_framebuffer *old_fb)
{
	DRM_DEBUG_KMS("%s\n", __FILE__);

	mode = adjusted_mode;

	return exynos_drm_crtc_update(crtc);
}

static int exynos_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
					  struct drm_framebuffer *old_fb)
{
	int ret;

	DRM_DEBUG_KMS("%s\n", __FILE__);

	ret = exynos_drm_crtc_update(crtc);
	if (ret)
		return ret;

	exynos_drm_crtc_apply(crtc);

	return ret;
}

static void exynos_drm_crtc_load_lut(struct drm_crtc *crtc)
{
	DRM_DEBUG_KMS("%s\n", __FILE__);
	/* drm framework doesn't check NULL */
}

static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = {
	.dpms		= exynos_drm_crtc_dpms,
	.prepare	= exynos_drm_crtc_prepare,
	.commit		= exynos_drm_crtc_commit,
	.mode_fixup	= exynos_drm_crtc_mode_fixup,
	.mode_set	= exynos_drm_crtc_mode_set,
	.mode_set_base	= exynos_drm_crtc_mode_set_base,
	.load_lut	= exynos_drm_crtc_load_lut,
};

static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc,
				      struct drm_framebuffer *fb,
				      struct drm_pending_vblank_event *event)
{
	struct drm_device *dev = crtc->dev;
	struct exynos_drm_private *dev_priv = dev->dev_private;
	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
	struct drm_framebuffer *old_fb = crtc->fb;
	int ret = -EINVAL;

	DRM_DEBUG_KMS("%s\n", __FILE__);

	mutex_lock(&dev->struct_mutex);

	if (event) {
		/*
		 * the pipe from user always is 0 so we can set pipe number
		 * of current owner to event.
		 */
		event->pipe = exynos_crtc->pipe;

		list_add_tail(&event->base.link,
				&dev_priv->pageflip_event_list);

		ret = drm_vblank_get(dev, exynos_crtc->pipe);
		if (ret) {
			DRM_DEBUG("failed to acquire vblank counter\n");
			list_del(&event->base.link);

			goto out;
		}

		crtc->fb = fb;
		ret = exynos_drm_crtc_update(crtc);
		if (ret) {
			crtc->fb = old_fb;
			drm_vblank_put(dev, exynos_crtc->pipe);
			list_del(&event->base.link);

			goto out;
		}

		/*
		 * the values related to a buffer of the drm framebuffer
		 * to be applied should be set at here. because these values
		 * first, are set to shadow registers and then to
		 * real registers at vsync front porch period.
		 */
		exynos_drm_crtc_apply(crtc);
	}
out:
	mutex_unlock(&dev->struct_mutex);
	return ret;
}

static void exynos_drm_crtc_destroy(struct drm_crtc *crtc)
{
	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);
	struct exynos_drm_private *private = crtc->dev->dev_private;

	DRM_DEBUG_KMS("%s\n", __FILE__);

	private->crtc[exynos_crtc->pipe] = NULL;

	drm_crtc_cleanup(crtc);
	kfree(exynos_crtc);
}

static struct drm_crtc_funcs exynos_crtc_funcs = {
	.set_config	= drm_crtc_helper_set_config,
	.page_flip	= exynos_drm_crtc_page_flip,
	.destroy	= exynos_drm_crtc_destroy,
};

struct exynos_drm_overlay *get_exynos_drm_overlay(struct drm_device *dev,
		struct drm_crtc *crtc)
{
	struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc);

	return &exynos_crtc->overlay;
}

int exynos_drm_crtc_create(struct drm_device *dev, unsigned int nr)
{
	struct exynos_drm_crtc *exynos_crtc;
	struct exynos_drm_private *private = dev->dev_private;
	struct drm_crtc *crtc;

	DRM_DEBUG_KMS("%s\n", __FILE__);

	exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL);
	if (!exynos_crtc) {
		DRM_ERROR("failed to allocate exynos crtc\n");
		return -ENOMEM;
	}

	exynos_crtc->pipe = nr;
	crtc = &exynos_crtc->drm_crtc;

	private->crtc[nr] = crtc;

	drm_crtc_init(dev, crtc, &exynos_crtc_funcs);
	drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs);

	return 0;
}

int exynos_drm_crtc_enable_vblank(struct drm_device *dev, int crtc)
{
	struct exynos_drm_private *private = dev->dev_private;

	DRM_DEBUG_KMS("%s\n", __FILE__);

	exynos_drm_fn_encoder(private->crtc[crtc], &crtc,
			exynos_drm_enable_vblank);

	return 0;
}

void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int crtc)
{
	struct exynos_drm_private *private = dev->dev_private;

	DRM_DEBUG_KMS("%s\n", __FILE__);

	exynos_drm_fn_encoder(private->crtc[crtc], &crtc,
			exynos_drm_disable_vblank);
}

MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
MODULE_DESCRIPTION("Samsung SoC DRM CRTC Driver");
MODULE_LICENSE("GPL");