summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/panel/panel-sharp-ls043t1le01.c
blob: 494aa9b1628a7275210e9a657522287a76c0e385 (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
/*
 * Copyright (C) 2015 Red Hat
 * Copyright (C) 2015 Sony Mobile Communications Inc.
 * Author: Werner Johansson <werner.johansson@sonymobile.com>
 *
 * Based on AUO panel driver by Rob Clark <robdclark@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <linux/backlight.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>

#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_panel.h>

#include <video/mipi_display.h>

struct sharp_nt_panel {
	struct drm_panel base;
	struct mipi_dsi_device *dsi;

	struct backlight_device *backlight;
	struct regulator *supply;
	struct gpio_desc *reset_gpio;

	bool prepared;
	bool enabled;

	const struct drm_display_mode *mode;
};

static inline struct sharp_nt_panel *to_sharp_nt_panel(struct drm_panel *panel)
{
	return container_of(panel, struct sharp_nt_panel, base);
}

static int sharp_nt_panel_init(struct sharp_nt_panel *sharp_nt)
{
	struct mipi_dsi_device *dsi = sharp_nt->dsi;
	int ret;

	dsi->mode_flags |= MIPI_DSI_MODE_LPM;

	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
	if (ret < 0)
		return ret;

	msleep(120);

	/* Novatek two-lane operation */
	ret = mipi_dsi_dcs_write(dsi, 0xae, (u8[]){ 0x03 }, 1);
	if (ret < 0)
		return ret;

	/* Set both MCU and RGB I/F to 24bpp */
	ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT |
					(MIPI_DCS_PIXEL_FMT_24BIT << 4));
	if (ret < 0)
		return ret;

	return 0;
}

static int sharp_nt_panel_on(struct sharp_nt_panel *sharp_nt)
{
	struct mipi_dsi_device *dsi = sharp_nt->dsi;
	int ret;

	dsi->mode_flags |= MIPI_DSI_MODE_LPM;

	ret = mipi_dsi_dcs_set_display_on(dsi);
	if (ret < 0)
		return ret;

	return 0;
}

static int sharp_nt_panel_off(struct sharp_nt_panel *sharp_nt)
{
	struct mipi_dsi_device *dsi = sharp_nt->dsi;
	int ret;

	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;

	ret = mipi_dsi_dcs_set_display_off(dsi);
	if (ret < 0)
		return ret;

	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
	if (ret < 0)
		return ret;

	return 0;
}


static int sharp_nt_panel_disable(struct drm_panel *panel)
{
	struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);

	if (!sharp_nt->enabled)
		return 0;

	backlight_disable(sharp_nt->backlight);

	sharp_nt->enabled = false;

	return 0;
}

static int sharp_nt_panel_unprepare(struct drm_panel *panel)
{
	struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
	int ret;

	if (!sharp_nt->prepared)
		return 0;

	ret = sharp_nt_panel_off(sharp_nt);
	if (ret < 0) {
		dev_err(panel->dev, "failed to set panel off: %d\n", ret);
		return ret;
	}

	regulator_disable(sharp_nt->supply);
	if (sharp_nt->reset_gpio)
		gpiod_set_value(sharp_nt->reset_gpio, 0);

	sharp_nt->prepared = false;

	return 0;
}

static int sharp_nt_panel_prepare(struct drm_panel *panel)
{
	struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);
	int ret;

	if (sharp_nt->prepared)
		return 0;

	ret = regulator_enable(sharp_nt->supply);
	if (ret < 0)
		return ret;

	msleep(20);

	if (sharp_nt->reset_gpio) {
		gpiod_set_value(sharp_nt->reset_gpio, 1);
		msleep(1);
		gpiod_set_value(sharp_nt->reset_gpio, 0);
		msleep(1);
		gpiod_set_value(sharp_nt->reset_gpio, 1);
		msleep(10);
	}

	ret = sharp_nt_panel_init(sharp_nt);
	if (ret < 0) {
		dev_err(panel->dev, "failed to init panel: %d\n", ret);
		goto poweroff;
	}

	ret = sharp_nt_panel_on(sharp_nt);
	if (ret < 0) {
		dev_err(panel->dev, "failed to set panel on: %d\n", ret);
		goto poweroff;
	}

	sharp_nt->prepared = true;

	return 0;

poweroff:
	regulator_disable(sharp_nt->supply);
	if (sharp_nt->reset_gpio)
		gpiod_set_value(sharp_nt->reset_gpio, 0);
	return ret;
}

static int sharp_nt_panel_enable(struct drm_panel *panel)
{
	struct sharp_nt_panel *sharp_nt = to_sharp_nt_panel(panel);

	if (sharp_nt->enabled)
		return 0;

	backlight_enable(sharp_nt->backlight);

	sharp_nt->enabled = true;

	return 0;
}

static const struct drm_display_mode default_mode = {
	.clock = 41118,
	.hdisplay = 540,
	.hsync_start = 540 + 48,
	.hsync_end = 540 + 48 + 80,
	.htotal = 540 + 48 + 80 + 32,
	.vdisplay = 960,
	.vsync_start = 960 + 3,
	.vsync_end = 960 + 3 + 15,
	.vtotal = 960 + 3 + 15 + 1,
	.vrefresh = 60,
};

static int sharp_nt_panel_get_modes(struct drm_panel *panel)
{
	struct drm_display_mode *mode;

	mode = drm_mode_duplicate(panel->drm, &default_mode);
	if (!mode) {
		dev_err(panel->drm->dev, "failed to add mode %ux%ux@%u\n",
				default_mode.hdisplay, default_mode.vdisplay,
				default_mode.vrefresh);
		return -ENOMEM;
	}

	drm_mode_set_name(mode);

	drm_mode_probed_add(panel->connector, mode);

	panel->connector->display_info.width_mm = 54;
	panel->connector->display_info.height_mm = 95;

	return 1;
}

static const struct drm_panel_funcs sharp_nt_panel_funcs = {
	.disable = sharp_nt_panel_disable,
	.unprepare = sharp_nt_panel_unprepare,
	.prepare = sharp_nt_panel_prepare,
	.enable = sharp_nt_panel_enable,
	.get_modes = sharp_nt_panel_get_modes,
};

static int sharp_nt_panel_add(struct sharp_nt_panel *sharp_nt)
{
	struct device *dev = &sharp_nt->dsi->dev;

	sharp_nt->mode = &default_mode;

	sharp_nt->supply = devm_regulator_get(dev, "avdd");
	if (IS_ERR(sharp_nt->supply))
		return PTR_ERR(sharp_nt->supply);

	sharp_nt->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
	if (IS_ERR(sharp_nt->reset_gpio)) {
		dev_err(dev, "cannot get reset-gpios %ld\n",
			PTR_ERR(sharp_nt->reset_gpio));
		sharp_nt->reset_gpio = NULL;
	} else {
		gpiod_set_value(sharp_nt->reset_gpio, 0);
	}

	sharp_nt->backlight = devm_of_find_backlight(dev);

	if (IS_ERR(sharp_nt->backlight))
		return PTR_ERR(sharp_nt->backlight);

	drm_panel_init(&sharp_nt->base);
	sharp_nt->base.funcs = &sharp_nt_panel_funcs;
	sharp_nt->base.dev = &sharp_nt->dsi->dev;

	return drm_panel_add(&sharp_nt->base);
}

static void sharp_nt_panel_del(struct sharp_nt_panel *sharp_nt)
{
	if (sharp_nt->base.dev)
		drm_panel_remove(&sharp_nt->base);
}

static int sharp_nt_panel_probe(struct mipi_dsi_device *dsi)
{
	struct sharp_nt_panel *sharp_nt;
	int ret;

	dsi->lanes = 2;
	dsi->format = MIPI_DSI_FMT_RGB888;
	dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
			MIPI_DSI_MODE_VIDEO_HSE |
			MIPI_DSI_CLOCK_NON_CONTINUOUS |
			MIPI_DSI_MODE_EOT_PACKET;

	sharp_nt = devm_kzalloc(&dsi->dev, sizeof(*sharp_nt), GFP_KERNEL);
	if (!sharp_nt)
		return -ENOMEM;

	mipi_dsi_set_drvdata(dsi, sharp_nt);

	sharp_nt->dsi = dsi;

	ret = sharp_nt_panel_add(sharp_nt);
	if (ret < 0)
		return ret;

	return mipi_dsi_attach(dsi);
}

static int sharp_nt_panel_remove(struct mipi_dsi_device *dsi)
{
	struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);
	int ret;

	ret = sharp_nt_panel_disable(&sharp_nt->base);
	if (ret < 0)
		dev_err(&dsi->dev, "failed to disable panel: %d\n", ret);

	ret = mipi_dsi_detach(dsi);
	if (ret < 0)
		dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);

	drm_panel_detach(&sharp_nt->base);
	sharp_nt_panel_del(sharp_nt);

	return 0;
}

static void sharp_nt_panel_shutdown(struct mipi_dsi_device *dsi)
{
	struct sharp_nt_panel *sharp_nt = mipi_dsi_get_drvdata(dsi);

	sharp_nt_panel_disable(&sharp_nt->base);
}

static const struct of_device_id sharp_nt_of_match[] = {
	{ .compatible = "sharp,ls043t1le01-qhd", },
	{ }
};
MODULE_DEVICE_TABLE(of, sharp_nt_of_match);

static struct mipi_dsi_driver sharp_nt_panel_driver = {
	.driver = {
		.name = "panel-sharp-ls043t1le01-qhd",
		.of_match_table = sharp_nt_of_match,
	},
	.probe = sharp_nt_panel_probe,
	.remove = sharp_nt_panel_remove,
	.shutdown = sharp_nt_panel_shutdown,
};
module_mipi_dsi_driver(sharp_nt_panel_driver);

MODULE_AUTHOR("Werner Johansson <werner.johansson@sonymobile.com>");
MODULE_DESCRIPTION("Sharp LS043T1LE01 NT35565-based qHD (540x960) video mode panel driver");
MODULE_LICENSE("GPL v2");
OpenPOWER on IntegriCloud