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	bool prepared;
24	bool enabled;
25};
26
27static inline struct visionox_rm69299 *panel_to_ctx(struct drm_panel *panel)
28{
29	return container_of(panel, struct visionox_rm69299, panel);
30}
31
32static int visionox_rm69299_power_on(struct visionox_rm69299 *ctx)
33{
34	int ret;
35
36	ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
37	if (ret < 0)
38		return ret;
39
40	/*
41	 * Reset sequence of visionox panel requires the panel to be
42	 * out of reset for 10ms, followed by being held in reset
43	 * for 10ms and then out again
44	 */
45	gpiod_set_value(ctx->reset_gpio, 1);
46	usleep_range(10000, 20000);
47	gpiod_set_value(ctx->reset_gpio, 0);
48	usleep_range(10000, 20000);
49	gpiod_set_value(ctx->reset_gpio, 1);
50	usleep_range(10000, 20000);
51
52	return 0;
53}
54
55static int visionox_rm69299_power_off(struct visionox_rm69299 *ctx)
56{
57	gpiod_set_value(ctx->reset_gpio, 0);
58
59	return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
60}
61
62static int visionox_rm69299_unprepare(struct drm_panel *panel)
63{
64	struct visionox_rm69299 *ctx = panel_to_ctx(panel);
65	int ret;
66
67	ctx->dsi->mode_flags = 0;
68
69	ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_SET_DISPLAY_OFF, NULL, 0);
70	if (ret < 0)
71		dev_err(ctx->panel.dev, "set_display_off cmd failed ret = %d\n", ret);
72
73	/* 120ms delay required here as per DCS spec */
74	msleep(120);
75
76	ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_ENTER_SLEEP_MODE, NULL, 0);
77	if (ret < 0) {
78		dev_err(ctx->panel.dev, "enter_sleep cmd failed ret = %d\n", ret);
79	}
80
81	ret = visionox_rm69299_power_off(ctx);
82
83	ctx->prepared = false;
84	return ret;
85}
86
87static int visionox_rm69299_prepare(struct drm_panel *panel)
88{
89	struct visionox_rm69299 *ctx = panel_to_ctx(panel);
90	int ret;
91
92	if (ctx->prepared)
93		return 0;
94
95	ret = visionox_rm69299_power_on(ctx);
96	if (ret < 0)
97		return ret;
98
99	ctx->dsi->mode_flags |= MIPI_DSI_MODE_LPM;
100
101	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0xfe, 0x00 }, 2);
102	if (ret < 0) {
103		dev_err(ctx->panel.dev, "cmd set tx 0 failed, ret = %d\n", ret);
104		goto power_off;
105	}
106
107	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0xc2, 0x08 }, 2);
108	if (ret < 0) {
109		dev_err(ctx->panel.dev, "cmd set tx 1 failed, ret = %d\n", ret);
110		goto power_off;
111	}
112
113	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0x35, 0x00 }, 2);
114	if (ret < 0) {
115		dev_err(ctx->panel.dev, "cmd set tx 2 failed, ret = %d\n", ret);
116		goto power_off;
117	}
118
119	ret = mipi_dsi_dcs_write_buffer(ctx->dsi, (u8[]) { 0x51, 0xff }, 2);
120	if (ret < 0) {
121		dev_err(ctx->panel.dev, "cmd set tx 3 failed, ret = %d\n", ret);
122		goto power_off;
123	}
124
125	ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_EXIT_SLEEP_MODE, NULL, 0);
126	if (ret < 0) {
127		dev_err(ctx->panel.dev, "exit_sleep_mode cmd failed ret = %d\n", ret);
128		goto power_off;
129	}
130
131	/* Per DSI spec wait 120ms after sending exit sleep DCS command */
132	msleep(120);
133
134	ret = mipi_dsi_dcs_write(ctx->dsi, MIPI_DCS_SET_DISPLAY_ON, NULL, 0);
135	if (ret < 0) {
136		dev_err(ctx->panel.dev, "set_display_on cmd failed ret = %d\n", ret);
137		goto power_off;
138	}
139
140	/* Per DSI spec wait 120ms after sending set_display_on DCS command */
141	msleep(120);
142
143	ctx->prepared = true;
144
145	return 0;
146
147power_off:
148	return ret;
149}
150
151static const struct drm_display_mode visionox_rm69299_1080x2248_60hz = {
152	.name = "1080x2248",
153	.clock = 158695,
154	.hdisplay = 1080,
155	.hsync_start = 1080 + 26,
156	.hsync_end = 1080 + 26 + 2,
157	.htotal = 1080 + 26 + 2 + 36,
158	.vdisplay = 2248,
159	.vsync_start = 2248 + 56,
160	.vsync_end = 2248 + 56 + 4,
161	.vtotal = 2248 + 56 + 4 + 4,
162	.flags = 0,
163};
164
165static int visionox_rm69299_get_modes(struct drm_panel *panel,
166				      struct drm_connector *connector)
167{
168	struct visionox_rm69299 *ctx = panel_to_ctx(panel);
169	struct drm_display_mode *mode;
170
171	mode = drm_mode_duplicate(connector->dev,
172				  &visionox_rm69299_1080x2248_60hz);
173	if (!mode) {
174		dev_err(ctx->panel.dev, "failed to create a new display mode\n");
175		return 0;
176	}
177
178	connector->display_info.width_mm = 74;
179	connector->display_info.height_mm = 131;
180	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
181	drm_mode_probed_add(connector, mode);
182
183	return 1;
184}
185
186static const struct drm_panel_funcs visionox_rm69299_drm_funcs = {
187	.unprepare = visionox_rm69299_unprepare,
188	.prepare = visionox_rm69299_prepare,
189	.get_modes = visionox_rm69299_get_modes,
190};
191
192static int visionox_rm69299_probe(struct mipi_dsi_device *dsi)
193{
194	struct device *dev = &dsi->dev;
195	struct visionox_rm69299 *ctx;
196	int ret;
197
198	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
199	if (!ctx)
200		return -ENOMEM;
201
202	mipi_dsi_set_drvdata(dsi, ctx);
203
204	ctx->panel.dev = dev;
205	ctx->dsi = dsi;
206
207	ctx->supplies[0].supply = "vdda";
208	ctx->supplies[1].supply = "vdd3p3";
209
210	ret = devm_regulator_bulk_get(ctx->panel.dev, ARRAY_SIZE(ctx->supplies),
211				      ctx->supplies);
212	if (ret < 0)
213		return ret;
214
215	ctx->reset_gpio = devm_gpiod_get(ctx->panel.dev,
216					 "reset", GPIOD_OUT_LOW);
217	if (IS_ERR(ctx->reset_gpio)) {
218		dev_err(dev, "cannot get reset gpio %ld\n", PTR_ERR(ctx->reset_gpio));
219		return PTR_ERR(ctx->reset_gpio);
220	}
221
222	drm_panel_init(&ctx->panel, dev, &visionox_rm69299_drm_funcs,
223		       DRM_MODE_CONNECTOR_DSI);
224	ctx->panel.dev = dev;
225	ctx->panel.funcs = &visionox_rm69299_drm_funcs;
226	drm_panel_add(&ctx->panel);
227
228	dsi->lanes = 4;
229	dsi->format = MIPI_DSI_FMT_RGB888;
230	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_LPM |
231			  MIPI_DSI_CLOCK_NON_CONTINUOUS;
232	ret = mipi_dsi_attach(dsi);
233	if (ret < 0) {
234		dev_err(dev, "dsi attach failed ret = %d\n", ret);
235		goto err_dsi_attach;
236	}
237
238	ret = regulator_set_load(ctx->supplies[0].consumer, 32000);
239	if (ret) {
240		dev_err(dev, "regulator set load failed for vdda supply ret = %d\n", ret);
241		goto err_set_load;
242	}
243
244	ret = regulator_set_load(ctx->supplies[1].consumer, 13200);
245	if (ret) {
246		dev_err(dev, "regulator set load failed for vdd3p3 supply ret = %d\n", ret);
247		goto err_set_load;
248	}
249
250	return 0;
251
252err_set_load:
253	mipi_dsi_detach(dsi);
254err_dsi_attach:
255	drm_panel_remove(&ctx->panel);
256	return ret;
257}
258
259static void visionox_rm69299_remove(struct mipi_dsi_device *dsi)
260{
261	struct visionox_rm69299 *ctx = mipi_dsi_get_drvdata(dsi);
262
263	mipi_dsi_detach(ctx->dsi);
264	mipi_dsi_device_unregister(ctx->dsi);
265
266	drm_panel_remove(&ctx->panel);
267}
268
269static const struct of_device_id visionox_rm69299_of_match[] = {
270	{ .compatible = "visionox,rm69299-1080p-display", },
271	{ /* sentinel */ }
272};
273MODULE_DEVICE_TABLE(of, visionox_rm69299_of_match);
274
275static struct mipi_dsi_driver visionox_rm69299_driver = {
276	.driver = {
277		.name = "panel-visionox-rm69299",
278		.of_match_table = visionox_rm69299_of_match,
279	},
280	.probe = visionox_rm69299_probe,
281	.remove = visionox_rm69299_remove,
282};
283module_mipi_dsi_driver(visionox_rm69299_driver);
284
285MODULE_DESCRIPTION("Visionox RM69299 DSI Panel Driver");
286MODULE_LICENSE("GPL v2");
287