1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2019, The Linux Foundation. All rights reserved.
4 */
5
6#include <linux/delay.h>
7#include <linux/module.h>
8#include <linux/mod_devicetable.h>
9#include <linux/gpio/consumer.h>
10#include <linux/regulator/consumer.h>
11
12#include <video/mipi_display.h>
13
14#include <drm/drm_mipi_dsi.h>
15#include <drm/drm_modes.h>
16#include <drm/drm_panel.h>
17
18struct visionox_rm69299 {
19	struct drm_panel panel;
20	struct regulator_bulk_data supplies[2];
21	struct gpio_desc *reset_gpio;
22	struct mipi_dsi_device *dsi;
23};
24
25static inline struct visionox_rm69299 *panel_to_ctx(struct drm_panel *panel)
26{
27	return container_of(panel, struct visionox_rm69299, panel);
28}
29
30static int visionox_rm69299_power_on(struct visionox_rm69299 *ctx)
31{
32	int ret;
33
34	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
35	if (ret < 0)
36		return ret;
37
38	/*
39	 * Reset sequence of visionox panel requires the panel to be
40	 * out of reset for 10ms, followed by being held in reset
41	 * for 10ms and then out again
42	 */
43	gpiod_set_value(ctx->reset_gpio, 1);
44	usleep_range(10000, 20000);
45	gpiod_set_value(ctx->reset_gpio, 0);
46	usleep_range(10000, 20000);
47	gpiod_set_value(ctx->reset_gpio, 1);
48	usleep_range(10000, 20000);
49
50	return 0;
51}
52
53static int visionox_rm69299_power_off(struct visionox_rm69299 *ctx)
54{
55	gpiod_set_value(ctx->reset_gpio, 0);
56
57	return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
58}
59
60static int visionox_rm69299_unprepare(struct drm_panel *panel)
61{
62	struct visionox_rm69299 *ctx = panel_to_ctx(panel);
63	int ret;
64
65	ctx->dsi->mode_flags = 0;
66
67	ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_SET_DISPLAY_OFF, NULL, 0);
68	if (ret < 0)
69		dev_err(ctx->panel.dev, "set_display_off cmd failed ret = %d\n", ret);
70
71	/* 120ms delay required here as per DCS spec */
72	msleep(120);
73
74	ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_ENTER_SLEEP_MODE, NULL, 0);
75	if (ret < 0) {
76		dev_err(ctx->panel.dev, "enter_sleep cmd failed ret = %d\n", ret);
77	}
78
79	ret = visionox_rm69299_power_off(ctx);
80
81	return ret;
82}
83
84static int visionox_rm69299_prepare(struct drm_panel *panel)
85{
86	struct visionox_rm69299 *ctx = panel_to_ctx(panel);
87	int ret;
88
89	ret = visionox_rm69299_power_on(ctx);
90	if (ret < 0)
91		return ret;
92
93	ctx->dsi->mode_flags |= MIPI_DSI_MODE_LPM;
94
95	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0xfe, 0x00 }, 2);
96	if (ret < 0) {
97		dev_err(ctx->panel.dev, "cmd set tx 0 failed, ret = %d\n", ret);
98		goto power_off;
99	}
100
101	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0xc2, 0x08 }, 2);
102	if (ret < 0) {
103		dev_err(ctx->panel.dev, "cmd set tx 1 failed, ret = %d\n", ret);
104		goto power_off;
105	}
106
107	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0x35, 0x00 }, 2);
108	if (ret < 0) {
109		dev_err(ctx->panel.dev, "cmd set tx 2 failed, ret = %d\n", ret);
110		goto power_off;
111	}
112
113	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0x51, 0xff }, 2);
114	if (ret < 0) {
115		dev_err(ctx->panel.dev, "cmd set tx 3 failed, ret = %d\n", ret);
116		goto power_off;
117	}
118
119	ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_EXIT_SLEEP_MODE, NULL, 0);
120	if (ret < 0) {
121		dev_err(ctx->panel.dev, "exit_sleep_mode cmd failed ret = %d\n", ret);
122		goto power_off;
123	}
124
125	/* Per DSI spec wait 120ms after sending exit sleep DCS command */
126	msleep(120);
127
128	ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_SET_DISPLAY_ON, NULL, 0);
129	if (ret < 0) {
130		dev_err(ctx->panel.dev, "set_display_on cmd failed ret = %d\n", ret);
131		goto power_off;
132	}
133
134	/* Per DSI spec wait 120ms after sending set_display_on DCS command */
135	msleep(120);
136
137	return 0;
138
139power_off:
140	return ret;
141}
142
143static const struct drm_display_mode visionox_rm69299_1080x2248_60hz = {
144	.name = "1080x2248",
145	.clock = 158695,
146	.hdisplay = 1080,
147	.hsync_start = 1080 + 26,
148	.hsync_end = 1080 + 26 + 2,
149	.htotal = 1080 + 26 + 2 + 36,
150	.vdisplay = 2248,
151	.vsync_start = 2248 + 56,
152	.vsync_end = 2248 + 56 + 4,
153	.vtotal = 2248 + 56 + 4 + 4,
154	.flags = 0,
155};
156
157static int visionox_rm69299_get_modes(struct drm_panel *panel,
158				      struct drm_connector *connector)
159{
160	struct visionox_rm69299 *ctx = panel_to_ctx(panel);
161	struct drm_display_mode *mode;
162
163	mode = drm_mode_duplicate(connector->dev,
164				  &visionox_rm69299_1080x2248_60hz);
165	if (!mode) {
166		dev_err(ctx->panel.dev, "failed to create a new display mode\n");
167		return 0;
168	}
169
170	connector->display_info.width_mm = 74;
171	connector->display_info.height_mm = 131;
172	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
173	drm_mode_probed_add(connector, mode);
174
175	return 1;
176}
177
178static const struct drm_panel_funcs visionox_rm69299_drm_funcs = {
179	.unprepare = visionox_rm69299_unprepare,
180	.prepare = visionox_rm69299_prepare,
181	.get_modes = visionox_rm69299_get_modes,
182};
183
184static int visionox_rm69299_probe(struct mipi_dsi_device *dsi)
185{
186	struct device *dev = &dsi->dev;
187	struct visionox_rm69299 *ctx;
188	int ret;
189
190	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
191	if (!ctx)
192		return -ENOMEM;
193
194	mipi_dsi_set_drvdata(dsi, ctx);
195
196	ctx->panel.dev = dev;
197	ctx->dsi = dsi;
198
199	ctx->supplies[0].supply = "vdda";
200	ctx->supplies[1].supply = "vdd3p3";
201
202	ret = devm_regulator_bulk_get(ctx->panel.dev, ARRAY_SIZE(ctx->supplies),
203				      ctx->supplies);
204	if (ret < 0)
205		return ret;
206
207	ctx->reset_gpio = devm_gpiod_get(ctx->panel.dev,
208					 "reset", GPIOD_OUT_LOW);
209	if (IS_ERR(ctx->reset_gpio)) {
210		dev_err(dev, "cannot get reset gpio %ld\n", PTR_ERR(ctx->reset_gpio));
211		return PTR_ERR(ctx->reset_gpio);
212	}
213
214	drm_panel_init(&ctx->panel, dev, &visionox_rm69299_drm_funcs,
215		       DRM_MODE_CONNECTOR_DSI);
216	ctx->panel.dev = dev;
217	ctx->panel.funcs = &visionox_rm69299_drm_funcs;
218	drm_panel_add(&ctx->panel);
219
220	dsi->lanes = 4;
221	dsi->format = MIPI_DSI_FMT_RGB888;
222	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_LPM |
223			  MIPI_DSI_CLOCK_NON_CONTINUOUS;
224	ret = mipi_dsi_attach(dsi);
225	if (ret < 0) {
226		dev_err(dev, "dsi attach failed ret = %d\n", ret);
227		goto err_dsi_attach;
228	}
229
230	ret = regulator_set_load(ctx->supplies[0].consumer, 32000);
231	if (ret) {
232		dev_err(dev, "regulator set load failed for vdda supply ret = %d\n", ret);
233		goto err_set_load;
234	}
235
236	ret = regulator_set_load(ctx->supplies[1].consumer, 13200);
237	if (ret) {
238		dev_err(dev, "regulator set load failed for vdd3p3 supply ret = %d\n", ret);
239		goto err_set_load;
240	}
241
242	return 0;
243
244err_set_load:
245	mipi_dsi_detach(dsi);
246err_dsi_attach:
247	drm_panel_remove(&ctx->panel);
248	return ret;
249}
250
251static void visionox_rm69299_remove(struct mipi_dsi_device *dsi)
252{
253	struct visionox_rm69299 *ctx = mipi_dsi_get_drvdata(dsi);
254
255	mipi_dsi_detach(ctx->dsi);
256	drm_panel_remove(&ctx->panel);
257}
258
259static const struct of_device_id visionox_rm69299_of_match[] = {
260	{ .compatible = "visionox,rm69299-1080p-display", },
261	{ /* sentinel */ }
262};
263MODULE_DEVICE_TABLE(of, visionox_rm69299_of_match);
264
265static struct mipi_dsi_driver visionox_rm69299_driver = {
266	.driver = {
267		.name = "panel-visionox-rm69299",
268		.of_match_table = visionox_rm69299_of_match,
269	},
270	.probe = visionox_rm69299_probe,
271	.remove = visionox_rm69299_remove,
272};
273module_mipi_dsi_driver(visionox_rm69299_driver);
274
275MODULE_DESCRIPTION("Visionox RM69299 DSI Panel Driver");
276MODULE_LICENSE("GPL v2");
277