summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/panel/panel-visionox-rm69299.c
blob: ec228c269146f0c5177de3a16ccbe04010ed8339 (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
// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2019, The Linux Foundation. All rights reserved.
 */

#include <linux/delay.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/gpio/consumer.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 visionox_rm69299 {
	struct drm_panel panel;
	struct regulator_bulk_data supplies[2];
	struct gpio_desc *reset_gpio;
	struct mipi_dsi_device *dsi;
	bool prepared;
	bool enabled;
};

static inline struct visionox_rm69299 *panel_to_ctx(struct drm_panel *panel)
{
	return container_of(panel, struct visionox_rm69299, panel);
}

static int visionox_rm69299_power_on(struct visionox_rm69299 *ctx)
{
	int ret;

	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
	if (ret < 0)
		return ret;

	/*
	 * Reset sequence of visionox panel requires the panel to be
	 * out of reset for 10ms, followed by being held in reset
	 * for 10ms and then out again
	 */
	gpiod_set_value(ctx->reset_gpio, 1);
	usleep_range(10000, 20000);
	gpiod_set_value(ctx->reset_gpio, 0);
	usleep_range(10000, 20000);
	gpiod_set_value(ctx->reset_gpio, 1);
	usleep_range(10000, 20000);

	return 0;
}

static int visionox_rm69299_power_off(struct visionox_rm69299 *ctx)
{
	gpiod_set_value(ctx->reset_gpio, 0);

	return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
}

static int visionox_rm69299_unprepare(struct drm_panel *panel)
{
	struct visionox_rm69299 *ctx = panel_to_ctx(panel);
	int ret;

	ctx->dsi->mode_flags = 0;

	ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_SET_DISPLAY_OFF, NULL, 0);
	if (ret < 0)
		dev_err(ctx->panel.dev, "set_display_off cmd failed ret = %d\n", ret);

	/* 120ms delay required here as per DCS spec */
	msleep(120);

	ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_ENTER_SLEEP_MODE, NULL, 0);
	if (ret < 0) {
		dev_err(ctx->panel.dev, "enter_sleep cmd failed ret = %d\n", ret);
	}

	ret = visionox_rm69299_power_off(ctx);

	ctx->prepared = false;
	return ret;
}

static int visionox_rm69299_prepare(struct drm_panel *panel)
{
	struct visionox_rm69299 *ctx = panel_to_ctx(panel);
	int ret;

	if (ctx->prepared)
		return 0;

	ret = visionox_rm69299_power_on(ctx);
	if (ret < 0)
		return ret;

	ctx->dsi->mode_flags |= MIPI_DSI_MODE_LPM;

	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0xfe, 0x00 }, 2);
	if (ret < 0) {
		dev_err(ctx->panel.dev, "cmd set tx 0 failed, ret = %d\n", ret);
		goto power_off;
	}

	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0xc2, 0x08 }, 2);
	if (ret < 0) {
		dev_err(ctx->panel.dev, "cmd set tx 1 failed, ret = %d\n", ret);
		goto power_off;
	}

	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0x35, 0x00 }, 2);
	if (ret < 0) {
		dev_err(ctx->panel.dev, "cmd set tx 2 failed, ret = %d\n", ret);
		goto power_off;
	}

	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0x51, 0xff }, 2);
	if (ret < 0) {
		dev_err(ctx->panel.dev, "cmd set tx 3 failed, ret = %d\n", ret);
		goto power_off;
	}

	ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_EXIT_SLEEP_MODE, NULL, 0);
	if (ret < 0) {
		dev_err(ctx->panel.dev, "exit_sleep_mode cmd failed ret = %d\n", ret);
		goto power_off;
	}

	/* Per DSI spec wait 120ms after sending exit sleep DCS command */
	msleep(120);

	ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_SET_DISPLAY_ON, NULL, 0);
	if (ret < 0) {
		dev_err(ctx->panel.dev, "set_display_on cmd failed ret = %d\n", ret);
		goto power_off;
	}

	/* Per DSI spec wait 120ms after sending set_display_on DCS command */
	msleep(120);

	ctx->prepared = true;

	return 0;

power_off:
	return ret;
}

static const struct drm_display_mode visionox_rm69299_1080x2248_60hz = {
	.name = "1080x2248",
	.clock = 158695,
	.hdisplay = 1080,
	.hsync_start = 1080 + 26,
	.hsync_end = 1080 + 26 + 2,
	.htotal = 1080 + 26 + 2 + 36,
	.vdisplay = 2248,
	.vsync_start = 2248 + 56,
	.vsync_end = 2248 + 56 + 4,
	.vtotal = 2248 + 56 + 4 + 4,
	.flags = 0,
};

static int visionox_rm69299_get_modes(struct drm_panel *panel,
				      struct drm_connector *connector)
{
	struct visionox_rm69299 *ctx = panel_to_ctx(panel);
	struct drm_display_mode *mode;

	mode = drm_mode_duplicate(connector->dev,
				  &visionox_rm69299_1080x2248_60hz);
	if (!mode) {
		dev_err(ctx->panel.dev, "failed to create a new display mode\n");
		return 0;
	}

	connector->display_info.width_mm = 74;
	connector->display_info.height_mm = 131;
	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
	drm_mode_probed_add(connector, mode);

	return 1;
}

static const struct drm_panel_funcs visionox_rm69299_drm_funcs = {
	.unprepare = visionox_rm69299_unprepare,
	.prepare = visionox_rm69299_prepare,
	.get_modes = visionox_rm69299_get_modes,
};

static int visionox_rm69299_probe(struct mipi_dsi_device *dsi)
{
	struct device *dev = &dsi->dev;
	struct visionox_rm69299 *ctx;
	int ret;

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

	mipi_dsi_set_drvdata(dsi, ctx);

	ctx->panel.dev = dev;
	ctx->dsi = dsi;

	ctx->supplies[0].supply = "vdda";
	ctx->supplies[1].supply = "vdd3p3";

	ret = devm_regulator_bulk_get(ctx->panel.dev, ARRAY_SIZE(ctx->supplies),
				      ctx->supplies);
	if (ret < 0)
		return ret;

	ctx->reset_gpio = devm_gpiod_get(ctx->panel.dev,
					 "reset", GPIOD_OUT_LOW);
	if (IS_ERR(ctx->reset_gpio)) {
		dev_err(dev, "cannot get reset gpio %ld\n", PTR_ERR(ctx->reset_gpio));
		return PTR_ERR(ctx->reset_gpio);
	}

	drm_panel_init(&ctx->panel, dev, &visionox_rm69299_drm_funcs,
		       DRM_MODE_CONNECTOR_DSI);
	ctx->panel.dev = dev;
	ctx->panel.funcs = &visionox_rm69299_drm_funcs;
	drm_panel_add(&ctx->panel);

	dsi->lanes = 4;
	dsi->format = MIPI_DSI_FMT_RGB888;
	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_LPM |
			  MIPI_DSI_CLOCK_NON_CONTINUOUS;
	ret = mipi_dsi_attach(dsi);
	if (ret < 0) {
		dev_err(dev, "dsi attach failed ret = %d\n", ret);
		goto err_dsi_attach;
	}

	ret = regulator_set_load(ctx->supplies[0].consumer, 32000);
	if (ret) {
		dev_err(dev, "regulator set load failed for vdda supply ret = %d\n", ret);
		goto err_set_load;
	}

	ret = regulator_set_load(ctx->supplies[1].consumer, 13200);
	if (ret) {
		dev_err(dev, "regulator set load failed for vdd3p3 supply ret = %d\n", ret);
		goto err_set_load;
	}

	return 0;

err_set_load:
	mipi_dsi_detach(dsi);
err_dsi_attach:
	drm_panel_remove(&ctx->panel);
	return ret;
}

static void visionox_rm69299_remove(struct mipi_dsi_device *dsi)
{
	struct visionox_rm69299 *ctx = mipi_dsi_get_drvdata(dsi);

	mipi_dsi_detach(ctx->dsi);
	mipi_dsi_device_unregister(ctx->dsi);

	drm_panel_remove(&ctx->panel);
}

static const struct of_device_id visionox_rm69299_of_match[] = {
	{ .compatible = "visionox,rm69299-1080p-display", },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, visionox_rm69299_of_match);

static struct mipi_dsi_driver visionox_rm69299_driver = {
	.driver = {
		.name = "panel-visionox-rm69299",
		.of_match_table = visionox_rm69299_of_match,
	},
	.probe = visionox_rm69299_probe,
	.remove = visionox_rm69299_remove,
};
module_mipi_dsi_driver(visionox_rm69299_driver);

MODULE_DESCRIPTION("Visionox RM69299 DSI Panel Driver");
MODULE_LICENSE("GPL v2");