summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/panel/panel-xinpeng-xpp055c272.c
blob: 06341deb60ca7b010ecf9be8f0b600dbc36b3ea0 (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
396
397
// SPDX-License-Identifier: GPL-2.0
/*
 * Xinpeng xpp055c272 5.5" MIPI-DSI panel driver
 * Copyright (C) 2019 Theobroma Systems Design und Consulting GmbH
 *
 * based on
 *
 * Rockteck jh057n00900 5.5" MIPI-DSI panel driver
 * Copyright (C) Purism SPC 2019
 */

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

#include <video/display_timing.h>
#include <video/mipi_display.h>

#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/media-bus-format.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regulator/consumer.h>

/* Manufacturer specific Commands send via DSI */
#define XPP055C272_CMD_ALL_PIXEL_OFF	0x22
#define XPP055C272_CMD_ALL_PIXEL_ON	0x23
#define XPP055C272_CMD_SETDISP		0xb2
#define XPP055C272_CMD_SETRGBIF		0xb3
#define XPP055C272_CMD_SETCYC		0xb4
#define XPP055C272_CMD_SETBGP		0xb5
#define XPP055C272_CMD_SETVCOM		0xb6
#define XPP055C272_CMD_SETOTP		0xb7
#define XPP055C272_CMD_SETPOWER_EXT	0xb8
#define XPP055C272_CMD_SETEXTC		0xb9
#define XPP055C272_CMD_SETMIPI		0xbA
#define XPP055C272_CMD_SETVDC		0xbc
#define XPP055C272_CMD_SETPCR		0xbf
#define XPP055C272_CMD_SETSCR		0xc0
#define XPP055C272_CMD_SETPOWER		0xc1
#define XPP055C272_CMD_SETECO		0xc6
#define XPP055C272_CMD_SETPANEL		0xcc
#define XPP055C272_CMD_SETGAMMA		0xe0
#define XPP055C272_CMD_SETEQ		0xe3
#define XPP055C272_CMD_SETGIP1		0xe9
#define XPP055C272_CMD_SETGIP2		0xea

struct xpp055c272 {
	struct device *dev;
	struct drm_panel panel;
	struct gpio_desc *reset_gpio;
	struct regulator *vci;
	struct regulator *iovcc;
	bool prepared;
};

static inline struct xpp055c272 *panel_to_xpp055c272(struct drm_panel *panel)
{
	return container_of(panel, struct xpp055c272, panel);
}

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

static int xpp055c272_init_sequence(struct xpp055c272 *ctx)
{
	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
	struct device *dev = ctx->dev;

	/*
	 * Init sequence was supplied by the panel vendor without much
	 * documentation.
	 */
	dsi_generic_write_seq(dsi, XPP055C272_CMD_SETEXTC, 0xf1, 0x12, 0x83);
	dsi_generic_write_seq(dsi, XPP055C272_CMD_SETMIPI,
			      0x33, 0x81, 0x05, 0xf9, 0x0e, 0x0e, 0x00, 0x00,
			      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x44, 0x25,
			      0x00, 0x91, 0x0a, 0x00, 0x00, 0x02, 0x4f, 0x01,
			      0x00, 0x00, 0x37);
	dsi_generic_write_seq(dsi, XPP055C272_CMD_SETPOWER_EXT, 0x25);
	dsi_generic_write_seq(dsi, XPP055C272_CMD_SETPCR, 0x02, 0x11, 0x00);
	dsi_generic_write_seq(dsi, XPP055C272_CMD_SETRGBIF,
			      0x0c, 0x10, 0x0a, 0x50, 0x03, 0xff, 0x00, 0x00,
			      0x00, 0x00);
	dsi_generic_write_seq(dsi, XPP055C272_CMD_SETSCR,
			      0x73, 0x73, 0x50, 0x50, 0x00, 0x00, 0x08, 0x70,
			      0x00);
	dsi_generic_write_seq(dsi, XPP055C272_CMD_SETVDC, 0x46);
	dsi_generic_write_seq(dsi, XPP055C272_CMD_SETPANEL, 0x0b);
	dsi_generic_write_seq(dsi, XPP055C272_CMD_SETCYC, 0x80);
	dsi_generic_write_seq(dsi, XPP055C272_CMD_SETDISP, 0xc8, 0x12, 0x30);
	dsi_generic_write_seq(dsi, XPP055C272_CMD_SETEQ,
			      0x07, 0x07, 0x0B, 0x0B, 0x03, 0x0B, 0x00, 0x00,
			      0x00, 0x00, 0xFF, 0x00, 0xC0, 0x10);
	dsi_generic_write_seq(dsi, XPP055C272_CMD_SETPOWER,
			      0x53, 0x00, 0x1e, 0x1e, 0x77, 0xe1, 0xcc, 0xdd,
			      0x67, 0x77, 0x33, 0x33);
	dsi_generic_write_seq(dsi, XPP055C272_CMD_SETECO, 0x00, 0x00, 0xff,
			      0xff, 0x01, 0xff);
	dsi_generic_write_seq(dsi, XPP055C272_CMD_SETBGP, 0x09, 0x09);
	msleep(20);

	dsi_generic_write_seq(dsi, XPP055C272_CMD_SETVCOM, 0x87, 0x95);
	dsi_generic_write_seq(dsi, XPP055C272_CMD_SETGIP1,
			      0xc2, 0x10, 0x05, 0x05, 0x10, 0x05, 0xa0, 0x12,
			      0x31, 0x23, 0x3f, 0x81, 0x0a, 0xa0, 0x37, 0x18,
			      0x00, 0x80, 0x01, 0x00, 0x00, 0x00, 0x00, 0x80,
			      0x01, 0x00, 0x00, 0x00, 0x48, 0xf8, 0x86, 0x42,
			      0x08, 0x88, 0x88, 0x80, 0x88, 0x88, 0x88, 0x58,
			      0xf8, 0x87, 0x53, 0x18, 0x88, 0x88, 0x81, 0x88,
			      0x88, 0x88, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00,
			      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
	dsi_generic_write_seq(dsi, XPP055C272_CMD_SETGIP2,
			      0x00, 0x1a, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00,
			      0x00, 0x00, 0x00, 0x00, 0x1f, 0x88, 0x81, 0x35,
			      0x78, 0x88, 0x88, 0x85, 0x88, 0x88, 0x88, 0x0f,
			      0x88, 0x80, 0x24, 0x68, 0x88, 0x88, 0x84, 0x88,
			      0x88, 0x88, 0x23, 0x10, 0x00, 0x00, 0x1c, 0x00,
			      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
			      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x05,
			      0xa0, 0x00, 0x00, 0x00, 0x00);
	dsi_generic_write_seq(dsi, XPP055C272_CMD_SETGAMMA,
			      0x00, 0x06, 0x08, 0x2a, 0x31, 0x3f, 0x38, 0x36,
			      0x07, 0x0c, 0x0d, 0x11, 0x13, 0x12, 0x13, 0x11,
			      0x18, 0x00, 0x06, 0x08, 0x2a, 0x31, 0x3f, 0x38,
			      0x36, 0x07, 0x0c, 0x0d, 0x11, 0x13, 0x12, 0x13,
			      0x11, 0x18);

	msleep(60);

	DRM_DEV_DEBUG_DRIVER(dev, "Panel init sequence done\n");
	return 0;
}

static int xpp055c272_unprepare(struct drm_panel *panel)
{
	struct xpp055c272 *ctx = panel_to_xpp055c272(panel);
	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
	int ret;

	if (!ctx->prepared)
		return 0;

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

	mipi_dsi_dcs_enter_sleep_mode(dsi);
	if (ret < 0) {
		DRM_DEV_ERROR(ctx->dev, "failed to enter sleep mode: %d\n",
			      ret);
		return ret;
	}

	regulator_disable(ctx->iovcc);
	regulator_disable(ctx->vci);

	ctx->prepared = false;

	return 0;
}

static int xpp055c272_prepare(struct drm_panel *panel)
{
	struct xpp055c272 *ctx = panel_to_xpp055c272(panel);
	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
	int ret;

	if (ctx->prepared)
		return 0;

	DRM_DEV_DEBUG_DRIVER(ctx->dev, "Resetting the panel\n");
	ret = regulator_enable(ctx->vci);
	if (ret < 0) {
		DRM_DEV_ERROR(ctx->dev,
			      "Failed to enable vci supply: %d\n", ret);
		return ret;
	}
	ret = regulator_enable(ctx->iovcc);
	if (ret < 0) {
		DRM_DEV_ERROR(ctx->dev,
			      "Failed to enable iovcc supply: %d\n", ret);
		goto disable_vci;
	}

	gpiod_set_value_cansleep(ctx->reset_gpio, 1);
	/* T6: 10us */
	usleep_range(10, 20);
	gpiod_set_value_cansleep(ctx->reset_gpio, 0);

	/* T8: 20ms */
	msleep(20);

	ret = xpp055c272_init_sequence(ctx);
	if (ret < 0) {
		DRM_DEV_ERROR(ctx->dev, "Panel init sequence failed: %d\n",
			      ret);
		goto disable_iovcc;
	}

	ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
	if (ret < 0) {
		DRM_DEV_ERROR(ctx->dev, "Failed to exit sleep mode: %d\n", ret);
		goto disable_iovcc;
	}

	/* T9: 120ms */
	msleep(120);

	ret = mipi_dsi_dcs_set_display_on(dsi);
	if (ret < 0) {
		DRM_DEV_ERROR(ctx->dev, "Failed to set display on: %d\n", ret);
		goto disable_iovcc;
	}

	msleep(50);

	ctx->prepared = true;

	return 0;

disable_iovcc:
	regulator_disable(ctx->iovcc);
disable_vci:
	regulator_disable(ctx->vci);
	return ret;
}

static const struct drm_display_mode default_mode = {
	.hdisplay	= 720,
	.hsync_start	= 720 + 40,
	.hsync_end	= 720 + 40 + 10,
	.htotal		= 720 + 40 + 10 + 40,
	.vdisplay	= 1280,
	.vsync_start	= 1280 + 22,
	.vsync_end	= 1280 + 22 + 4,
	.vtotal		= 1280 + 22 + 4 + 11,
	.clock		= 64000,
	.width_mm	= 68,
	.height_mm	= 121,
};

static int xpp055c272_get_modes(struct drm_panel *panel,
				struct drm_connector *connector)
{
	struct xpp055c272 *ctx = panel_to_xpp055c272(panel);
	struct drm_display_mode *mode;

	mode = drm_mode_duplicate(connector->dev, &default_mode);
	if (!mode) {
		DRM_DEV_ERROR(ctx->dev, "Failed to add mode %ux%u@%u\n",
			      default_mode.hdisplay, default_mode.vdisplay,
			      drm_mode_vrefresh(&default_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 xpp055c272_funcs = {
	.unprepare	= xpp055c272_unprepare,
	.prepare	= xpp055c272_prepare,
	.get_modes	= xpp055c272_get_modes,
};

static int xpp055c272_probe(struct mipi_dsi_device *dsi)
{
	struct device *dev = &dsi->dev;
	struct xpp055c272 *ctx;
	int ret;

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

	ctx->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
	if (IS_ERR(ctx->reset_gpio)) {
		DRM_DEV_ERROR(dev, "cannot get reset gpio\n");
		return PTR_ERR(ctx->reset_gpio);
	}

	ctx->vci = devm_regulator_get(dev, "vci");
	if (IS_ERR(ctx->vci)) {
		ret = PTR_ERR(ctx->vci);
		if (ret != -EPROBE_DEFER)
			DRM_DEV_ERROR(dev,
				      "Failed to request vci regulator: %d\n",
				      ret);
		return ret;
	}

	ctx->iovcc = devm_regulator_get(dev, "iovcc");
	if (IS_ERR(ctx->iovcc)) {
		ret = PTR_ERR(ctx->iovcc);
		if (ret != -EPROBE_DEFER)
			DRM_DEV_ERROR(dev,
				      "Failed to request iovcc regulator: %d\n",
				      ret);
		return ret;
	}

	mipi_dsi_set_drvdata(dsi, ctx);

	ctx->dev = dev;

	dsi->lanes = 4;
	dsi->format = MIPI_DSI_FMT_RGB888;
	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
			  MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_EOT_PACKET;

	drm_panel_init(&ctx->panel, &dsi->dev, &xpp055c272_funcs,
		       DRM_MODE_CONNECTOR_DSI);

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

	drm_panel_add(&ctx->panel);

	ret = mipi_dsi_attach(dsi);
	if (ret < 0) {
		DRM_DEV_ERROR(dev, "mipi_dsi_attach failed: %d\n", ret);
		drm_panel_remove(&ctx->panel);
		return ret;
	}

	return 0;
}

static void xpp055c272_shutdown(struct mipi_dsi_device *dsi)
{
	struct xpp055c272 *ctx = mipi_dsi_get_drvdata(dsi);
	int ret;

	ret = drm_panel_unprepare(&ctx->panel);
	if (ret < 0)
		DRM_DEV_ERROR(&dsi->dev, "Failed to unprepare panel: %d\n",
			      ret);

	ret = drm_panel_disable(&ctx->panel);
	if (ret < 0)
		DRM_DEV_ERROR(&dsi->dev, "Failed to disable panel: %d\n",
			      ret);
}

static int xpp055c272_remove(struct mipi_dsi_device *dsi)
{
	struct xpp055c272 *ctx = mipi_dsi_get_drvdata(dsi);
	int ret;

	xpp055c272_shutdown(dsi);

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

	drm_panel_remove(&ctx->panel);

	return 0;
}

static const struct of_device_id xpp055c272_of_match[] = {
	{ .compatible = "xinpeng,xpp055c272" },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, xpp055c272_of_match);

static struct mipi_dsi_driver xpp055c272_driver = {
	.driver = {
		.name = "panel-xinpeng-xpp055c272",
		.of_match_table = xpp055c272_of_match,
	},
	.probe	= xpp055c272_probe,
	.remove = xpp055c272_remove,
	.shutdown = xpp055c272_shutdown,
};
module_mipi_dsi_driver(xpp055c272_driver);

MODULE_AUTHOR("Heiko Stuebner <heiko.stuebner@theobroma-systems.com>");
MODULE_DESCRIPTION("DRM driver for Xinpeng xpp055c272 MIPI DSI panel");
MODULE_LICENSE("GPL v2");