summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c
blob: 48e3acaecdf33de5b82c3eea1c44f0409ebf5f8f (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
// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2018 Amarula Solutions
 * Author: Jagan Teki <jagan@amarulasolutions.com>
 */

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

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

#define FEIYANG_INIT_CMD_LEN	2

struct feiyang {
	struct drm_panel	panel;
	struct mipi_dsi_device	*dsi;

	struct regulator	*dvdd;
	struct regulator	*avdd;
	struct gpio_desc	*reset;
};

static inline struct feiyang *panel_to_feiyang(struct drm_panel *panel)
{
	return container_of(panel, struct feiyang, panel);
}

struct feiyang_init_cmd {
	u8 data[FEIYANG_INIT_CMD_LEN];
};

static const struct feiyang_init_cmd feiyang_init_cmds[] = {
	{ .data = { 0x80, 0x58 } },
	{ .data = { 0x81, 0x47 } },
	{ .data = { 0x82, 0xD4 } },
	{ .data = { 0x83, 0x88 } },
	{ .data = { 0x84, 0xA9 } },
	{ .data = { 0x85, 0xC3 } },
	{ .data = { 0x86, 0x82 } },
};

static int feiyang_prepare(struct drm_panel *panel)
{
	struct feiyang *ctx = panel_to_feiyang(panel);
	struct mipi_dsi_device *dsi = ctx->dsi;
	unsigned int i;
	int ret;

	ret = regulator_enable(ctx->dvdd);
	if (ret)
		return ret;

	/* T1 (dvdd start + dvdd rise) 0 < T1 <= 10ms */
	msleep(10);

	ret = regulator_enable(ctx->avdd);
	if (ret)
		return ret;

	/* T3 (dvdd rise + avdd start + avdd rise) T3 >= 20ms */
	msleep(20);

	gpiod_set_value(ctx->reset, 0);

	/*
	 * T5 + T6 (avdd rise + video & logic signal rise)
	 * T5 >= 10ms, 0 < T6 <= 10ms
	 */
	msleep(20);

	gpiod_set_value(ctx->reset, 1);

	/* T12 (video & logic signal rise + backlight rise) T12 >= 200ms */
	msleep(200);

	for (i = 0; i < ARRAY_SIZE(feiyang_init_cmds); i++) {
		const struct feiyang_init_cmd *cmd =
						&feiyang_init_cmds[i];

		ret = mipi_dsi_dcs_write_buffer(dsi, cmd->data,
						FEIYANG_INIT_CMD_LEN);
		if (ret < 0)
			return ret;
	}

	return 0;
}

static int feiyang_enable(struct drm_panel *panel)
{
	struct feiyang *ctx = panel_to_feiyang(panel);

	/* T12 (video & logic signal rise + backlight rise) T12 >= 200ms */
	msleep(200);

	mipi_dsi_dcs_set_display_on(ctx->dsi);

	return 0;
}

static int feiyang_disable(struct drm_panel *panel)
{
	struct feiyang *ctx = panel_to_feiyang(panel);

	return mipi_dsi_dcs_set_display_off(ctx->dsi);
}

static int feiyang_unprepare(struct drm_panel *panel)
{
	struct feiyang *ctx = panel_to_feiyang(panel);
	int ret;

	ret = mipi_dsi_dcs_set_display_off(ctx->dsi);
	if (ret < 0)
		dev_err(panel->dev, "failed to set display off: %d\n", ret);

	ret = mipi_dsi_dcs_enter_sleep_mode(ctx->dsi);
	if (ret < 0)
		dev_err(panel->dev, "failed to enter sleep mode: %d\n", ret);

	/* T13 (backlight fall + video & logic signal fall) T13 >= 200ms */
	msleep(200);

	gpiod_set_value(ctx->reset, 0);

	regulator_disable(ctx->avdd);

	/* T11 (dvdd rise to fall) 0 < T11 <= 10ms  */
	msleep(10);

	regulator_disable(ctx->dvdd);

	return 0;
}

static const struct drm_display_mode feiyang_default_mode = {
	.clock		= 55000,

	.hdisplay	= 1024,
	.hsync_start	= 1024 + 310,
	.hsync_end	= 1024 + 310 + 20,
	.htotal		= 1024 + 310 + 20 + 90,

	.vdisplay	= 600,
	.vsync_start	= 600 + 12,
	.vsync_end	= 600 + 12 + 2,
	.vtotal		= 600 + 12 + 2 + 21,

	.type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
};

static int feiyang_get_modes(struct drm_panel *panel,
			     struct drm_connector *connector)
{
	struct feiyang *ctx = panel_to_feiyang(panel);
	struct drm_display_mode *mode;

	mode = drm_mode_duplicate(connector->dev, &feiyang_default_mode);
	if (!mode) {
		dev_err(&ctx->dsi->dev, "failed to add mode %ux%u@%u\n",
			feiyang_default_mode.hdisplay,
			feiyang_default_mode.vdisplay,
			drm_mode_vrefresh(&feiyang_default_mode));
		return -ENOMEM;
	}

	drm_mode_set_name(mode);

	drm_mode_probed_add(connector, mode);

	return 1;
}

static const struct drm_panel_funcs feiyang_funcs = {
	.disable = feiyang_disable,
	.unprepare = feiyang_unprepare,
	.prepare = feiyang_prepare,
	.enable = feiyang_enable,
	.get_modes = feiyang_get_modes,
};

static int feiyang_dsi_probe(struct mipi_dsi_device *dsi)
{
	struct feiyang *ctx;
	int ret;

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

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

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

	ctx->dvdd = devm_regulator_get(&dsi->dev, "dvdd");
	if (IS_ERR(ctx->dvdd))
		return dev_err_probe(&dsi->dev, PTR_ERR(ctx->dvdd),
				     "Couldn't get dvdd regulator\n");

	ctx->avdd = devm_regulator_get(&dsi->dev, "avdd");
	if (IS_ERR(ctx->avdd))
		return dev_err_probe(&dsi->dev, PTR_ERR(ctx->avdd),
				     "Couldn't get avdd regulator\n");

	ctx->reset = devm_gpiod_get_optional(&dsi->dev, "reset", GPIOD_OUT_LOW);
	if (IS_ERR(ctx->reset))
		return dev_err_probe(&dsi->dev, PTR_ERR(ctx->reset),
				     "Couldn't get our reset GPIO\n");

	ret = drm_panel_of_backlight(&ctx->panel);
	if (ret)
		return ret;

	drm_panel_add(&ctx->panel);

	dsi->mode_flags = MIPI_DSI_MODE_VIDEO_BURST;
	dsi->format = MIPI_DSI_FMT_RGB888;
	dsi->lanes = 4;

	ret = mipi_dsi_attach(dsi);
	if (ret < 0) {
		drm_panel_remove(&ctx->panel);
		return ret;
	}

	return 0;
}

static void feiyang_dsi_remove(struct mipi_dsi_device *dsi)
{
	struct feiyang *ctx = mipi_dsi_get_drvdata(dsi);

	mipi_dsi_detach(dsi);
	drm_panel_remove(&ctx->panel);
}

static const struct of_device_id feiyang_of_match[] = {
	{ .compatible = "feiyang,fy07024di26a30d", },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, feiyang_of_match);

static struct mipi_dsi_driver feiyang_driver = {
	.probe = feiyang_dsi_probe,
	.remove = feiyang_dsi_remove,
	.driver = {
		.name = "feiyang-fy07024di26a30d",
		.of_match_table = feiyang_of_match,
	},
};
module_mipi_dsi_driver(feiyang_driver);

MODULE_AUTHOR("Jagan Teki <jagan@amarulasolutions.com>");
MODULE_DESCRIPTION("Feiyang FY07024DI26A30-D MIPI-DSI LCD panel");
MODULE_LICENSE("GPL");