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
18 struct 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
panel_to_ctx(struct drm_panel * panel)25 static inline struct visionox_rm69299 *panel_to_ctx(struct drm_panel *panel)
26 {
27 return container_of(panel, struct visionox_rm69299, panel);
28 }
29
visionox_rm69299_power_on(struct visionox_rm69299 * ctx)30 static 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
visionox_rm69299_power_off(struct visionox_rm69299 * ctx)53 static 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
visionox_rm69299_unprepare(struct drm_panel * panel)60 static 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
visionox_rm69299_prepare(struct drm_panel * panel)84 static 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
139 power_off:
140 return ret;
141 }
142
143 static 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
visionox_rm69299_get_modes(struct drm_panel * panel,struct drm_connector * connector)157 static 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
178 static 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
visionox_rm69299_probe(struct mipi_dsi_device * dsi)184 static 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[0].init_load_uA = 32000;
201 ctx->supplies[1].supply = "vdd3p3";
202 ctx->supplies[1].init_load_uA = 13200;
203
204 ret = devm_regulator_bulk_get(ctx->panel.dev, ARRAY_SIZE(ctx->supplies),
205 ctx->supplies);
206 if (ret < 0)
207 return ret;
208
209 ctx->reset_gpio = devm_gpiod_get(ctx->panel.dev,
210 "reset", GPIOD_OUT_LOW);
211 if (IS_ERR(ctx->reset_gpio)) {
212 dev_err(dev, "cannot get reset gpio %ld\n", PTR_ERR(ctx->reset_gpio));
213 return PTR_ERR(ctx->reset_gpio);
214 }
215
216 drm_panel_init(&ctx->panel, dev, &visionox_rm69299_drm_funcs,
217 DRM_MODE_CONNECTOR_DSI);
218 ctx->panel.dev = dev;
219 ctx->panel.funcs = &visionox_rm69299_drm_funcs;
220 drm_panel_add(&ctx->panel);
221
222 dsi->lanes = 4;
223 dsi->format = MIPI_DSI_FMT_RGB888;
224 dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_LPM |
225 MIPI_DSI_CLOCK_NON_CONTINUOUS;
226 ret = mipi_dsi_attach(dsi);
227 if (ret < 0) {
228 dev_err(dev, "dsi attach failed ret = %d\n", ret);
229 goto err_dsi_attach;
230 }
231
232 return 0;
233
234 err_dsi_attach:
235 drm_panel_remove(&ctx->panel);
236 return ret;
237 }
238
visionox_rm69299_remove(struct mipi_dsi_device * dsi)239 static void visionox_rm69299_remove(struct mipi_dsi_device *dsi)
240 {
241 struct visionox_rm69299 *ctx = mipi_dsi_get_drvdata(dsi);
242
243 mipi_dsi_detach(ctx->dsi);
244 drm_panel_remove(&ctx->panel);
245 }
246
247 static const struct of_device_id visionox_rm69299_of_match[] = {
248 { .compatible = "visionox,rm69299-1080p-display", },
249 { /* sentinel */ }
250 };
251 MODULE_DEVICE_TABLE(of, visionox_rm69299_of_match);
252
253 static struct mipi_dsi_driver visionox_rm69299_driver = {
254 .driver = {
255 .name = "panel-visionox-rm69299",
256 .of_match_table = visionox_rm69299_of_match,
257 },
258 .probe = visionox_rm69299_probe,
259 .remove = visionox_rm69299_remove,
260 };
261 module_mipi_dsi_driver(visionox_rm69299_driver);
262
263 MODULE_DESCRIPTION("Visionox RM69299 DSI Panel Driver");
264 MODULE_LICENSE("GPL v2");
265