summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/panel/panel-samsung-s6e88a0-ams452ef01.c
blob: ea63799ff2a1e427fc872282e97f573e5e97ec5d (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
// SPDX-License-Identifier: GPL-2.0-only
// Copyright (C) 2019, Michael Srba

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

#include <video/mipi_display.h>

#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>

struct s6e88a0_ams452ef01 {
	struct drm_panel panel;
	struct mipi_dsi_device *dsi;
	struct regulator_bulk_data supplies[2];
	struct gpio_desc *reset_gpio;

	bool prepared;
};

static inline struct
s6e88a0_ams452ef01 *to_s6e88a0_ams452ef01(struct drm_panel *panel)
{
	return container_of(panel, struct s6e88a0_ams452ef01, panel);
}

#define dsi_dcs_write_seq(dsi, seq...) do {				\
		static const u8 d[] = { seq };				\
		int ret;						\
		ret = mipi_dsi_dcs_write_buffer(dsi, d, ARRAY_SIZE(d));	\
		if (ret < 0)						\
			return ret;					\
	} while (0)

static void s6e88a0_ams452ef01_reset(struct s6e88a0_ams452ef01 *ctx)
{
	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
	usleep_range(5000, 6000);
	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
	usleep_range(1000, 2000);
	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
	usleep_range(10000, 11000);
}

static int s6e88a0_ams452ef01_on(struct s6e88a0_ams452ef01 *ctx)
{
	struct mipi_dsi_device *dsi = ctx->dsi;
	struct device *dev = &dsi->dev;
	int ret;

	dsi->mode_flags |= MIPI_DSI_MODE_LPM;

	dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a); // enable LEVEL2 commands
	dsi_dcs_write_seq(dsi, 0xcc, 0x4c); // set Pixel Clock Divider polarity

	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
	if (ret < 0) {
		dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
		return ret;
	}
	msleep(120);

	// set default brightness/gama
	dsi_dcs_write_seq(dsi, 0xca,
			  0x01, 0x00, 0x01, 0x00, 0x01, 0x00,	// V255 RR,GG,BB
			  0x80, 0x80, 0x80,			// V203 R,G,B
			  0x80, 0x80, 0x80,			// V151 R,G,B
			  0x80, 0x80, 0x80,			// V87  R,G,B
			  0x80, 0x80, 0x80,			// V51  R,G,B
			  0x80, 0x80, 0x80,			// V35  R,G,B
			  0x80, 0x80, 0x80,			// V23  R,G,B
			  0x80, 0x80, 0x80,			// V11  R,G,B
			  0x6b, 0x68, 0x71,			// V3   R,G,B
			  0x00, 0x00, 0x00);			// V1   R,G,B
	// set default Amoled Off Ratio
	dsi_dcs_write_seq(dsi, 0xb2, 0x40, 0x0a, 0x17, 0x00, 0x0a);
	dsi_dcs_write_seq(dsi, 0xb6, 0x2c, 0x0b); // set default elvss voltage
	dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
	dsi_dcs_write_seq(dsi, 0xf7, 0x03); // gamma/aor update
	dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5); // disable LEVEL2 commands

	ret = mipi_dsi_dcs_set_display_on(dsi);
	if (ret < 0) {
		dev_err(dev, "Failed to set display on: %d\n", ret);
		return ret;
	}

	return 0;
}

static int s6e88a0_ams452ef01_off(struct s6e88a0_ams452ef01 *ctx)
{
	struct mipi_dsi_device *dsi = ctx->dsi;
	struct device *dev = &dsi->dev;
	int ret;

	dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;

	ret = mipi_dsi_dcs_set_display_off(dsi);
	if (ret < 0) {
		dev_err(dev, "Failed to set display off: %d\n", ret);
		return ret;
	}
	msleep(35);

	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
	if (ret < 0) {
		dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
		return ret;
	}
	msleep(120);

	return 0;
}

static int s6e88a0_ams452ef01_prepare(struct drm_panel *panel)
{
	struct s6e88a0_ams452ef01 *ctx = to_s6e88a0_ams452ef01(panel);
	struct device *dev = &ctx->dsi->dev;
	int ret;

	if (ctx->prepared)
		return 0;

	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
	if (ret < 0) {
		dev_err(dev, "Failed to enable regulators: %d\n", ret);
		return ret;
	}

	s6e88a0_ams452ef01_reset(ctx);

	ret = s6e88a0_ams452ef01_on(ctx);
	if (ret < 0) {
		dev_err(dev, "Failed to initialize panel: %d\n", ret);
		gpiod_set_value_cansleep(ctx->reset_gpio, 0);
		regulator_bulk_disable(ARRAY_SIZE(ctx->supplies),
				       ctx->supplies);
		return ret;
	}

	ctx->prepared = true;
	return 0;
}

static int s6e88a0_ams452ef01_unprepare(struct drm_panel *panel)
{
	struct s6e88a0_ams452ef01 *ctx = to_s6e88a0_ams452ef01(panel);
	struct device *dev = &ctx->dsi->dev;
	int ret;

	if (!ctx->prepared)
		return 0;

	ret = s6e88a0_ams452ef01_off(ctx);
	if (ret < 0)
		dev_err(dev, "Failed to un-initialize panel: %d\n", ret);

	gpiod_set_value_cansleep(ctx->reset_gpio, 0);
	regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);

	ctx->prepared = false;
	return 0;
}

static const struct drm_display_mode s6e88a0_ams452ef01_mode = {
	.clock = (540 + 88 + 4 + 20) * (960 + 14 + 2 + 8) * 60 / 1000,
	.hdisplay = 540,
	.hsync_start = 540 + 88,
	.hsync_end = 540 + 88 + 4,
	.htotal = 540 + 88 + 4 + 20,
	.vdisplay = 960,
	.vsync_start = 960 + 14,
	.vsync_end = 960 + 14 + 2,
	.vtotal = 960 + 14 + 2 + 8,
	.width_mm = 56,
	.height_mm = 100,
};

static int s6e88a0_ams452ef01_get_modes(struct drm_panel *panel,
					struct drm_connector *connector)
{
	struct drm_display_mode *mode;

	mode = drm_mode_duplicate(connector->dev, &s6e88a0_ams452ef01_mode);
	if (!mode)
		return -ENOMEM;

	drm_mode_set_name(mode);

	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
	connector->display_info.width_mm = mode->width_mm;
	connector->display_info.height_mm = mode->height_mm;
	drm_mode_probed_add(connector, mode);

	return 1;
}

static const struct drm_panel_funcs s6e88a0_ams452ef01_panel_funcs = {
	.unprepare = s6e88a0_ams452ef01_unprepare,
	.prepare = s6e88a0_ams452ef01_prepare,
	.get_modes = s6e88a0_ams452ef01_get_modes,
};

static int s6e88a0_ams452ef01_probe(struct mipi_dsi_device *dsi)
{
	struct device *dev = &dsi->dev;
	struct s6e88a0_ams452ef01 *ctx;
	int ret;

	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
	if (!ctx)
		return -ENOMEM;

	ctx->supplies[0].supply = "vdd3";
	ctx->supplies[1].supply = "vci";
	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
				      ctx->supplies);
	if (ret < 0) {
		dev_err(dev, "Failed to get regulators: %d\n", ret);
		return ret;
	}

	ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
	if (IS_ERR(ctx->reset_gpio)) {
		ret = PTR_ERR(ctx->reset_gpio);
		dev_err(dev, "Failed to get reset-gpios: %d\n", ret);
		return ret;
	}

	ctx->dsi = dsi;
	mipi_dsi_set_drvdata(dsi, ctx);

	dsi->lanes = 2;
	dsi->format = MIPI_DSI_FMT_RGB888;
	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST;

	drm_panel_init(&ctx->panel, dev, &s6e88a0_ams452ef01_panel_funcs,
		       DRM_MODE_CONNECTOR_DSI);

	drm_panel_add(&ctx->panel);

	ret = mipi_dsi_attach(dsi);
	if (ret < 0) {
		dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
		return ret;
	}

	return 0;
}

static int s6e88a0_ams452ef01_remove(struct mipi_dsi_device *dsi)
{
	struct s6e88a0_ams452ef01 *ctx = mipi_dsi_get_drvdata(dsi);
	int ret;

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

	drm_panel_remove(&ctx->panel);

	return 0;
}

static const struct of_device_id s6e88a0_ams452ef01_of_match[] = {
	{ .compatible = "samsung,s6e88a0-ams452ef01" },
	{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, s6e88a0_ams452ef01_of_match);

static struct mipi_dsi_driver s6e88a0_ams452ef01_driver = {
	.probe = s6e88a0_ams452ef01_probe,
	.remove = s6e88a0_ams452ef01_remove,
	.driver = {
		.name = "panel-s6e88a0-ams452ef01",
		.of_match_table = s6e88a0_ams452ef01_of_match,
	},
};
module_mipi_dsi_driver(s6e88a0_ams452ef01_driver);

MODULE_AUTHOR("Michael Srba <Michael.Srba@seznam.cz>");
MODULE_DESCRIPTION("MIPI-DSI based Panel Driver for AMS452EF01 AMOLED LCD with a S6E88A0 controller");
MODULE_LICENSE("GPL v2");