summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/exynos/exynos_drm_connector.c
blob: 18c271862ca8468a8ce0d3d4b24d8a595d29ad44 (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
384
385
386
387
388
389
390
391
392
393
394
395
/*
 * 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 <drm/drmP.h>
#include <drm/drm_crtc_helper.h>

#include <drm/exynos_drm.h>
#include "exynos_drm_drv.h"
#include "exynos_drm_encoder.h"

#define MAX_EDID 256
#define to_exynos_connector(x)	container_of(x, struct exynos_drm_connector,\
				drm_connector)

struct exynos_drm_connector {
	struct drm_connector	drm_connector;
	uint32_t		encoder_id;
	struct exynos_drm_manager *manager;
	uint32_t		dpms;
};

/* convert exynos_video_timings to drm_display_mode */
static inline void
convert_to_display_mode(struct drm_display_mode *mode,
			struct exynos_drm_panel_info *panel)
{
	struct fb_videomode *timing = &panel->timing;
	DRM_DEBUG_KMS("%s\n", __FILE__);

	mode->clock = timing->pixclock / 1000;
	mode->vrefresh = timing->refresh;

	mode->hdisplay = timing->xres;
	mode->hsync_start = mode->hdisplay + timing->right_margin;
	mode->hsync_end = mode->hsync_start + timing->hsync_len;
	mode->htotal = mode->hsync_end + timing->left_margin;

	mode->vdisplay = timing->yres;
	mode->vsync_start = mode->vdisplay + timing->lower_margin;
	mode->vsync_end = mode->vsync_start + timing->vsync_len;
	mode->vtotal = mode->vsync_end + timing->upper_margin;
	mode->width_mm = panel->width_mm;
	mode->height_mm = panel->height_mm;

	if (timing->vmode & FB_VMODE_INTERLACED)
		mode->flags |= DRM_MODE_FLAG_INTERLACE;

	if (timing->vmode & FB_VMODE_DOUBLE)
		mode->flags |= DRM_MODE_FLAG_DBLSCAN;
}

/* convert drm_display_mode to exynos_video_timings */
static inline void
convert_to_video_timing(struct fb_videomode *timing,
			struct drm_display_mode *mode)
{
	DRM_DEBUG_KMS("%s\n", __FILE__);

	memset(timing, 0, sizeof(*timing));

	timing->pixclock = mode->clock * 1000;
	timing->refresh = drm_mode_vrefresh(mode);

	timing->xres = mode->hdisplay;
	timing->right_margin = mode->hsync_start - mode->hdisplay;
	timing->hsync_len = mode->hsync_end - mode->hsync_start;
	timing->left_margin = mode->htotal - mode->hsync_end;

	timing->yres = mode->vdisplay;
	timing->lower_margin = mode->vsync_start - mode->vdisplay;
	timing->vsync_len = mode->vsync_end - mode->vsync_start;
	timing->upper_margin = mode->vtotal - mode->vsync_end;

	if (mode->flags & DRM_MODE_FLAG_INTERLACE)
		timing->vmode = FB_VMODE_INTERLACED;
	else
		timing->vmode = FB_VMODE_NONINTERLACED;

	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
		timing->vmode |= FB_VMODE_DOUBLE;
}

static int exynos_drm_connector_get_modes(struct drm_connector *connector)
{
	struct exynos_drm_connector *exynos_connector =
					to_exynos_connector(connector);
	struct exynos_drm_manager *manager = exynos_connector->manager;
	struct exynos_drm_display_ops *display_ops = manager->display_ops;
	unsigned int count;

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

	if (!display_ops) {
		DRM_DEBUG_KMS("display_ops is null.\n");
		return 0;
	}

	/*
	 * if get_edid() exists then get_edid() callback of hdmi side
	 * is called to get edid data through i2c interface else
	 * get timing from the FIMD driver(display controller).
	 *
	 * P.S. in case of lcd panel, count is always 1 if success
	 * because lcd panel has only one mode.
	 */
	if (display_ops->get_edid) {
		int ret;
		void *edid;

		edid = kzalloc(MAX_EDID, GFP_KERNEL);
		if (!edid) {
			DRM_ERROR("failed to allocate edid\n");
			return 0;
		}

		ret = display_ops->get_edid(manager->dev, connector,
						edid, MAX_EDID);
		if (ret < 0) {
			DRM_ERROR("failed to get edid data.\n");
			kfree(edid);
			edid = NULL;
			return 0;
		}

		drm_mode_connector_update_edid_property(connector, edid);
		count = drm_add_edid_modes(connector, edid);
		kfree(edid);
	} else {
		struct exynos_drm_panel_info *panel;
		struct drm_display_mode *mode = drm_mode_create(connector->dev);
		if (!mode) {
			DRM_ERROR("failed to create a new display mode.\n");
			return 0;
		}

		if (display_ops->get_panel)
			panel = display_ops->get_panel(manager->dev);
		else {
			drm_mode_destroy(connector->dev, mode);
			return 0;
		}

		convert_to_display_mode(mode, panel);
		connector->display_info.width_mm = mode->width_mm;
		connector->display_info.height_mm = mode->height_mm;

		mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
		drm_mode_set_name(mode);
		drm_mode_probed_add(connector, mode);

		count = 1;
	}

	return count;
}

static int exynos_drm_connector_mode_valid(struct drm_connector *connector,
					    struct drm_display_mode *mode)
{
	struct exynos_drm_connector *exynos_connector =
					to_exynos_connector(connector);
	struct exynos_drm_manager *manager = exynos_connector->manager;
	struct exynos_drm_display_ops *display_ops = manager->display_ops;
	struct fb_videomode timing;
	int ret = MODE_BAD;

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

	convert_to_video_timing(&timing, mode);

	if (display_ops && display_ops->check_timing)
		if (!display_ops->check_timing(manager->dev, (void *)&timing))
			ret = MODE_OK;

	return ret;
}

struct drm_encoder *exynos_drm_best_encoder(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct exynos_drm_connector *exynos_connector =
					to_exynos_connector(connector);
	struct drm_mode_object *obj;
	struct drm_encoder *encoder;

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

	obj = drm_mode_object_find(dev, exynos_connector->encoder_id,
				   DRM_MODE_OBJECT_ENCODER);
	if (!obj) {
		DRM_DEBUG_KMS("Unknown ENCODER ID %d\n",
				exynos_connector->encoder_id);
		return NULL;
	}

	encoder = obj_to_encoder(obj);

	return encoder;
}

static struct drm_connector_helper_funcs exynos_connector_helper_funcs = {
	.get_modes	= exynos_drm_connector_get_modes,
	.mode_valid	= exynos_drm_connector_mode_valid,
	.best_encoder	= exynos_drm_best_encoder,
};

void exynos_drm_display_power(struct drm_connector *connector, int mode)
{
	struct drm_encoder *encoder = exynos_drm_best_encoder(connector);
	struct exynos_drm_connector *exynos_connector;
	struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
	struct exynos_drm_display_ops *display_ops = manager->display_ops;

	exynos_connector = to_exynos_connector(connector);

	if (exynos_connector->dpms == mode) {
		DRM_DEBUG_KMS("desired dpms mode is same as previous one.\n");
		return;
	}

	if (display_ops && display_ops->power_on)
		display_ops->power_on(manager->dev, mode);

	exynos_connector->dpms = mode;
}

static void exynos_drm_connector_dpms(struct drm_connector *connector,
					int mode)
{
	DRM_DEBUG_KMS("%s\n", __FILE__);

	/*
	 * in case that drm_crtc_helper_set_mode() is called,
	 * encoder/crtc->funcs->dpms() will be just returned
	 * because they already were DRM_MODE_DPMS_ON so only
	 * exynos_drm_display_power() will be called.
	 */
	drm_helper_connector_dpms(connector, mode);

	exynos_drm_display_power(connector, mode);

}

static int exynos_drm_connector_fill_modes(struct drm_connector *connector,
				unsigned int max_width, unsigned int max_height)
{
	struct exynos_drm_connector *exynos_connector =
					to_exynos_connector(connector);
	struct exynos_drm_manager *manager = exynos_connector->manager;
	struct exynos_drm_manager_ops *ops = manager->ops;
	unsigned int width, height;

	width = max_width;
	height = max_height;

	/*
	 * if specific driver want to find desired_mode using maxmum
	 * resolution then get max width and height from that driver.
	 */
	if (ops && ops->get_max_resol)
		ops->get_max_resol(manager->dev, &width, &height);

	return drm_helper_probe_single_connector_modes(connector, width,
							height);
}

/* get detection status of display device. */
static enum drm_connector_status
exynos_drm_connector_detect(struct drm_connector *connector, bool force)
{
	struct exynos_drm_connector *exynos_connector =
					to_exynos_connector(connector);
	struct exynos_drm_manager *manager = exynos_connector->manager;
	struct exynos_drm_display_ops *display_ops =
					manager->display_ops;
	enum drm_connector_status status = connector_status_disconnected;

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

	if (display_ops && display_ops->is_connected) {
		if (display_ops->is_connected(manager->dev))
			status = connector_status_connected;
		else
			status = connector_status_disconnected;
	}

	return status;
}

static void exynos_drm_connector_destroy(struct drm_connector *connector)
{
	struct exynos_drm_connector *exynos_connector =
		to_exynos_connector(connector);

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

	drm_sysfs_connector_remove(connector);
	drm_connector_cleanup(connector);
	kfree(exynos_connector);
}

static struct drm_connector_funcs exynos_connector_funcs = {
	.dpms		= exynos_drm_connector_dpms,
	.fill_modes	= exynos_drm_connector_fill_modes,
	.detect		= exynos_drm_connector_detect,
	.destroy	= exynos_drm_connector_destroy,
};

struct drm_connector *exynos_drm_connector_create(struct drm_device *dev,
						   struct drm_encoder *encoder)
{
	struct exynos_drm_connector *exynos_connector;
	struct exynos_drm_manager *manager = exynos_drm_get_manager(encoder);
	struct drm_connector *connector;
	int type;
	int err;

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

	exynos_connector = kzalloc(sizeof(*exynos_connector), GFP_KERNEL);
	if (!exynos_connector) {
		DRM_ERROR("failed to allocate connector\n");
		return NULL;
	}

	connector = &exynos_connector->drm_connector;

	switch (manager->display_ops->type) {
	case EXYNOS_DISPLAY_TYPE_HDMI:
		type = DRM_MODE_CONNECTOR_HDMIA;
		connector->interlace_allowed = true;
		connector->polled = DRM_CONNECTOR_POLL_HPD;
		break;
	case EXYNOS_DISPLAY_TYPE_VIDI:
		type = DRM_MODE_CONNECTOR_VIRTUAL;
		connector->polled = DRM_CONNECTOR_POLL_HPD;
		break;
	default:
		type = DRM_MODE_CONNECTOR_Unknown;
		break;
	}

	drm_connector_init(dev, connector, &exynos_connector_funcs, type);
	drm_connector_helper_add(connector, &exynos_connector_helper_funcs);

	err = drm_sysfs_connector_add(connector);
	if (err)
		goto err_connector;

	exynos_connector->encoder_id = encoder->base.id;
	exynos_connector->manager = manager;
	exynos_connector->dpms = DRM_MODE_DPMS_OFF;
	connector->encoder = encoder;

	err = drm_mode_connector_attach_encoder(connector, encoder);
	if (err) {
		DRM_ERROR("failed to attach a connector to a encoder\n");
		goto err_sysfs;
	}

	DRM_DEBUG_KMS("connector has been created\n");

	return connector;

err_sysfs:
	drm_sysfs_connector_remove(connector);
err_connector:
	drm_connector_cleanup(connector);
	kfree(exynos_connector);
	return NULL;
}